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- /* Alpha specific support for 64-bit ELF
- Copyright (C) 1996-2022 Free Software Foundation, Inc.
- Contributed by Richard Henderson <rth@tamu.edu>.
- This file is part of BFD, the Binary File Descriptor library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
- /* We need a published ABI spec for this. Until one comes out, don't
- assume this'll remain unchanged forever. */
- #include "sysdep.h"
- #include "bfd.h"
- #include "libbfd.h"
- #include "elf-bfd.h"
- #include "ecoff-bfd.h"
- #include "elf/alpha.h"
- #define ALPHAECOFF
- #define NO_COFF_RELOCS
- #define NO_COFF_SYMBOLS
- #define NO_COFF_LINENOS
- /* Get the ECOFF swapping routines. Needed for the debug information. */
- #include "coff/internal.h"
- #include "coff/sym.h"
- #include "coff/symconst.h"
- #include "coff/ecoff.h"
- #include "coff/alpha.h"
- #include "aout/ar.h"
- #include "libcoff.h"
- #include "libecoff.h"
- #define ECOFF_64
- #include "ecoffswap.h"
- /* Instruction data for plt generation and relaxation. */
- #define OP_LDA 0x08U
- #define OP_LDAH 0x09U
- #define OP_LDQ 0x29U
- #define OP_BR 0x30U
- #define OP_BSR 0x34U
- #define INSN_LDA (OP_LDA << 26)
- #define INSN_LDAH (OP_LDAH << 26)
- #define INSN_LDQ (OP_LDQ << 26)
- #define INSN_BR (OP_BR << 26)
- #define INSN_ADDQ 0x40000400
- #define INSN_RDUNIQ 0x0000009e
- #define INSN_SUBQ 0x40000520
- #define INSN_S4SUBQ 0x40000560
- #define INSN_UNOP 0x2ffe0000
- #define INSN_JSR 0x68004000
- #define INSN_JMP 0x68000000
- #define INSN_JSR_MASK 0xfc00c000
- #define INSN_A(I,A) (I | ((unsigned) A << 21))
- #define INSN_AB(I,A,B) (INSN_A (I, A) | (B << 16))
- #define INSN_ABC(I,A,B,C) (INSN_A (I, A) | (B << 16) | C)
- #define INSN_ABO(I,A,B,O) (INSN_A (I, A) | (B << 16) | ((O) & 0xffff))
- #define INSN_AD(I,A,D) (INSN_A (I, A) | (((D) >> 2) & 0x1fffff))
- /* PLT/GOT Stuff */
- /* Set by ld emulation. Putting this into the link_info or hash structure
- is simply working too hard. */
- #ifdef USE_SECUREPLT
- bool elf64_alpha_use_secureplt = true;
- #else
- bool elf64_alpha_use_secureplt = false;
- #endif
- #define OLD_PLT_HEADER_SIZE 32
- #define OLD_PLT_ENTRY_SIZE 12
- #define NEW_PLT_HEADER_SIZE 36
- #define NEW_PLT_ENTRY_SIZE 4
- #define PLT_HEADER_SIZE \
- (elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE)
- #define PLT_ENTRY_SIZE \
- (elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE)
- #define MAX_GOT_SIZE (64*1024)
- #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
- /* Used to implement multiple .got subsections. */
- struct alpha_elf_got_entry
- {
- struct alpha_elf_got_entry *next;
- /* Which .got subsection? */
- bfd *gotobj;
- /* The addend in effect for this entry. */
- bfd_vma addend;
- /* The .got offset for this entry. */
- int got_offset;
- /* The .plt offset for this entry. */
- int plt_offset;
- /* How many references to this entry? */
- int use_count;
- /* The relocation type of this entry. */
- unsigned char reloc_type;
- /* How a LITERAL is used. */
- unsigned char flags;
- /* Have we initialized the dynamic relocation for this entry? */
- unsigned char reloc_done;
- /* Have we adjusted this entry for SEC_MERGE? */
- unsigned char reloc_xlated;
- };
- struct alpha_elf_reloc_entry
- {
- struct alpha_elf_reloc_entry *next;
- /* Which .reloc section? */
- asection *srel;
- /* Which section this relocation is against? */
- asection *sec;
- /* How many did we find? */
- unsigned long count;
- /* What kind of relocation? */
- unsigned int rtype;
- };
- struct alpha_elf_link_hash_entry
- {
- struct elf_link_hash_entry root;
- /* External symbol information. */
- EXTR esym;
- /* Cumulative flags for all the .got entries. */
- int flags;
- /* Contexts in which a literal was referenced. */
- #define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
- #define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
- #define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
- #define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
- #define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
- #define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
- #define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40
- #define ALPHA_ELF_LINK_HASH_LU_PLT 0x38
- #define ALPHA_ELF_LINK_HASH_TLS_IE 0x80
- /* Used to implement multiple .got subsections. */
- struct alpha_elf_got_entry *got_entries;
- /* Used to count non-got, non-plt relocations for delayed sizing
- of relocation sections. */
- struct alpha_elf_reloc_entry *reloc_entries;
- };
- /* Alpha ELF linker hash table. */
- struct alpha_elf_link_hash_table
- {
- struct elf_link_hash_table root;
- /* The head of a list of .got subsections linked through
- alpha_elf_tdata(abfd)->got_link_next. */
- bfd *got_list;
- /* The most recent relax pass that we've seen. The GOTs
- should be regenerated if this doesn't match. */
- int relax_trip;
- };
- /* Look up an entry in a Alpha ELF linker hash table. */
- #define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \
- ((struct alpha_elf_link_hash_entry *) \
- elf_link_hash_lookup (&(table)->root, (string), (create), \
- (copy), (follow)))
- /* Traverse a Alpha ELF linker hash table. */
- #define alpha_elf_link_hash_traverse(table, func, info) \
- (elf_link_hash_traverse \
- (&(table)->root, \
- (bool (*) (struct elf_link_hash_entry *, void *)) (func), \
- (info)))
- /* Get the Alpha ELF linker hash table from a link_info structure. */
- #define alpha_elf_hash_table(p) \
- ((is_elf_hash_table ((p)->hash) \
- && elf_hash_table_id (elf_hash_table (p)) == ALPHA_ELF_DATA) \
- ? (struct alpha_elf_link_hash_table *) (p)->hash : NULL)
- /* Get the object's symbols as our own entry type. */
- #define alpha_elf_sym_hashes(abfd) \
- ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
- /* Should we do dynamic things to this symbol? This differs from the
- generic version in that we never need to consider function pointer
- equality wrt PLT entries -- we don't create a PLT entry if a symbol's
- address is ever taken. */
- static inline bool
- alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry *h,
- struct bfd_link_info *info)
- {
- return _bfd_elf_dynamic_symbol_p (h, info, 0);
- }
- /* Create an entry in a Alpha ELF linker hash table. */
- static struct bfd_hash_entry *
- elf64_alpha_link_hash_newfunc (struct bfd_hash_entry *entry,
- struct bfd_hash_table *table,
- const char *string)
- {
- struct alpha_elf_link_hash_entry *ret =
- (struct alpha_elf_link_hash_entry *) entry;
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (ret == (struct alpha_elf_link_hash_entry *) NULL)
- ret = ((struct alpha_elf_link_hash_entry *)
- bfd_hash_allocate (table,
- sizeof (struct alpha_elf_link_hash_entry)));
- if (ret == (struct alpha_elf_link_hash_entry *) NULL)
- return (struct bfd_hash_entry *) ret;
- /* Call the allocation method of the superclass. */
- ret = ((struct alpha_elf_link_hash_entry *)
- _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
- table, string));
- if (ret != (struct alpha_elf_link_hash_entry *) NULL)
- {
- /* Set local fields. */
- memset (&ret->esym, 0, sizeof (EXTR));
- /* We use -2 as a marker to indicate that the information has
- not been set. -1 means there is no associated ifd. */
- ret->esym.ifd = -2;
- ret->flags = 0;
- ret->got_entries = NULL;
- ret->reloc_entries = NULL;
- }
- return (struct bfd_hash_entry *) ret;
- }
- /* Create a Alpha ELF linker hash table. */
- static struct bfd_link_hash_table *
- elf64_alpha_bfd_link_hash_table_create (bfd *abfd)
- {
- struct alpha_elf_link_hash_table *ret;
- size_t amt = sizeof (struct alpha_elf_link_hash_table);
- ret = (struct alpha_elf_link_hash_table *) bfd_zmalloc (amt);
- if (ret == (struct alpha_elf_link_hash_table *) NULL)
- return NULL;
- if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
- elf64_alpha_link_hash_newfunc,
- sizeof (struct alpha_elf_link_hash_entry),
- ALPHA_ELF_DATA))
- {
- free (ret);
- return NULL;
- }
- return &ret->root.root;
- }
- /* Alpha ELF follows MIPS ELF in using a special find_nearest_line
- routine in order to handle the ECOFF debugging information. */
- struct alpha_elf_find_line
- {
- struct ecoff_debug_info d;
- struct ecoff_find_line i;
- };
- /* We have some private fields hanging off of the elf_tdata structure. */
- struct alpha_elf_obj_tdata
- {
- struct elf_obj_tdata root;
- /* For every input file, these are the got entries for that object's
- local symbols. */
- struct alpha_elf_got_entry ** local_got_entries;
- /* For every input file, this is the object that owns the got that
- this input file uses. */
- bfd *gotobj;
- /* For every got, this is a linked list through the objects using this got */
- bfd *in_got_link_next;
- /* For every got, this is a link to the next got subsegment. */
- bfd *got_link_next;
- /* For every got, this is the section. */
- asection *got;
- /* For every got, this is it's total number of words. */
- int total_got_size;
- /* For every got, this is the sum of the number of words required
- to hold all of the member object's local got. */
- int local_got_size;
- /* Used by elf64_alpha_find_nearest_line entry point. */
- struct alpha_elf_find_line *find_line_info;
- };
- #define alpha_elf_tdata(abfd) \
- ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
- #define is_alpha_elf(bfd) \
- (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
- && elf_tdata (bfd) != NULL \
- && elf_object_id (bfd) == ALPHA_ELF_DATA)
- static bool
- elf64_alpha_mkobject (bfd *abfd)
- {
- return bfd_elf_allocate_object (abfd, sizeof (struct alpha_elf_obj_tdata),
- ALPHA_ELF_DATA);
- }
- static bool
- elf64_alpha_object_p (bfd *abfd)
- {
- /* Set the right machine number for an Alpha ELF file. */
- return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
- }
- /* A relocation function which doesn't do anything. */
- static bfd_reloc_status_type
- elf64_alpha_reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
- asymbol *sym ATTRIBUTE_UNUSED,
- void * data ATTRIBUTE_UNUSED, asection *sec,
- bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
- {
- if (output_bfd)
- reloc->address += sec->output_offset;
- return bfd_reloc_ok;
- }
- /* A relocation function used for an unsupported reloc. */
- static bfd_reloc_status_type
- elf64_alpha_reloc_bad (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
- asymbol *sym ATTRIBUTE_UNUSED,
- void * data ATTRIBUTE_UNUSED, asection *sec,
- bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
- {
- if (output_bfd)
- reloc->address += sec->output_offset;
- return bfd_reloc_notsupported;
- }
- /* Do the work of the GPDISP relocation. */
- static bfd_reloc_status_type
- elf64_alpha_do_reloc_gpdisp (bfd *abfd, bfd_vma gpdisp, bfd_byte *p_ldah,
- bfd_byte *p_lda)
- {
- bfd_reloc_status_type ret = bfd_reloc_ok;
- bfd_vma addend;
- unsigned long i_ldah, i_lda;
- i_ldah = bfd_get_32 (abfd, p_ldah);
- i_lda = bfd_get_32 (abfd, p_lda);
- /* Complain if the instructions are not correct. */
- if (((i_ldah >> 26) & 0x3f) != 0x09
- || ((i_lda >> 26) & 0x3f) != 0x08)
- ret = bfd_reloc_dangerous;
- /* Extract the user-supplied offset, mirroring the sign extensions
- that the instructions perform. */
- addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
- addend = (addend ^ 0x80008000) - 0x80008000;
- gpdisp += addend;
- if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
- || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
- ret = bfd_reloc_overflow;
- /* compensate for the sign extension again. */
- i_ldah = ((i_ldah & 0xffff0000)
- | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
- i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
- bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah);
- bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda);
- return ret;
- }
- /* The special function for the GPDISP reloc. */
- static bfd_reloc_status_type
- elf64_alpha_reloc_gpdisp (bfd *abfd, arelent *reloc_entry,
- asymbol *sym ATTRIBUTE_UNUSED, void * data,
- asection *input_section, bfd *output_bfd,
- char **err_msg)
- {
- bfd_reloc_status_type ret;
- bfd_vma gp, relocation;
- bfd_vma high_address;
- bfd_byte *p_ldah, *p_lda;
- /* Don't do anything if we're not doing a final link. */
- if (output_bfd)
- {
- reloc_entry->address += input_section->output_offset;
- return bfd_reloc_ok;
- }
- high_address = bfd_get_section_limit (abfd, input_section);
- if (reloc_entry->address > high_address
- || reloc_entry->address + reloc_entry->addend > high_address)
- return bfd_reloc_outofrange;
- /* The gp used in the portion of the output object to which this
- input object belongs is cached on the input bfd. */
- gp = _bfd_get_gp_value (abfd);
- relocation = (input_section->output_section->vma
- + input_section->output_offset
- + reloc_entry->address);
- p_ldah = (bfd_byte *) data + reloc_entry->address;
- p_lda = p_ldah + reloc_entry->addend;
- ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
- /* Complain if the instructions are not correct. */
- if (ret == bfd_reloc_dangerous)
- *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
- return ret;
- }
- /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
- from smaller values. Start with zero, widen, *then* decrement. */
- #define MINUS_ONE (((bfd_vma)0) - 1)
- #define SKIP_HOWTO(N) \
- HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
- static reloc_howto_type elf64_alpha_howto_table[] =
- {
- HOWTO (R_ALPHA_NONE, /* type */
- 0, /* rightshift */
- 3, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_nil, /* special_function */
- "NONE", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- true), /* pcrel_offset */
- /* A 32 bit reference to a symbol. */
- HOWTO (R_ALPHA_REFLONG, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "REFLONG", /* name */
- false, /* partial_inplace */
- 0xffffffff, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- /* A 64 bit reference to a symbol. */
- HOWTO (R_ALPHA_REFQUAD, /* type */
- 0, /* rightshift */
- 4, /* size (0 = byte, 1 = short, 2 = long) */
- 64, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "REFQUAD", /* name */
- false, /* partial_inplace */
- MINUS_ONE, /* src_mask */
- MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
- /* A 32 bit GP relative offset. This is just like REFLONG except
- that when the value is used the value of the gp register will be
- added in. */
- HOWTO (R_ALPHA_GPREL32, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "GPREL32", /* name */
- false, /* partial_inplace */
- 0xffffffff, /* src_mask */
- 0xffffffff, /* dst_mask */
- false), /* pcrel_offset */
- /* Used for an instruction that refers to memory off the GP register. */
- HOWTO (R_ALPHA_LITERAL, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "ELF_LITERAL", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* This reloc only appears immediately following an ELF_LITERAL reloc.
- It identifies a use of the literal. The symbol index is special:
- 1 means the literal address is in the base register of a memory
- format instruction; 2 means the literal address is in the byte
- offset register of a byte-manipulation instruction; 3 means the
- literal address is in the target register of a jsr instruction.
- This does not actually do any relocation. */
- HOWTO (R_ALPHA_LITUSE, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_nil, /* special_function */
- "LITUSE", /* name */
- false, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- false), /* pcrel_offset */
- /* Load the gp register. This is always used for a ldah instruction
- which loads the upper 16 bits of the gp register. The symbol
- index of the GPDISP instruction is an offset in bytes to the lda
- instruction that loads the lower 16 bits. The value to use for
- the relocation is the difference between the GP value and the
- current location; the load will always be done against a register
- holding the current address.
- NOTE: Unlike ECOFF, partial in-place relocation is not done. If
- any offset is present in the instructions, it is an offset from
- the register to the ldah instruction. This lets us avoid any
- stupid hackery like inventing a gp value to do partial relocation
- against. Also unlike ECOFF, we do the whole relocation off of
- the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd,
- space consuming bit, that, since all the information was present
- in the GPDISP_HI16 reloc. */
- HOWTO (R_ALPHA_GPDISP, /* type */
- 16, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- elf64_alpha_reloc_gpdisp, /* special_function */
- "GPDISP", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- /* A 21 bit branch. */
- HOWTO (R_ALPHA_BRADDR, /* type */
- 2, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 21, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "BRADDR", /* name */
- false, /* partial_inplace */
- 0x1fffff, /* src_mask */
- 0x1fffff, /* dst_mask */
- true), /* pcrel_offset */
- /* A hint for a jump to a register. */
- HOWTO (R_ALPHA_HINT, /* type */
- 2, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 14, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "HINT", /* name */
- false, /* partial_inplace */
- 0x3fff, /* src_mask */
- 0x3fff, /* dst_mask */
- true), /* pcrel_offset */
- /* 16 bit PC relative offset. */
- HOWTO (R_ALPHA_SREL16, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "SREL16", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- true), /* pcrel_offset */
- /* 32 bit PC relative offset. */
- HOWTO (R_ALPHA_SREL32, /* type */
- 0, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 32, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "SREL32", /* name */
- false, /* partial_inplace */
- 0xffffffff, /* src_mask */
- 0xffffffff, /* dst_mask */
- true), /* pcrel_offset */
- /* A 64 bit PC relative offset. */
- HOWTO (R_ALPHA_SREL64, /* type */
- 0, /* rightshift */
- 4, /* size (0 = byte, 1 = short, 2 = long) */
- 64, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "SREL64", /* name */
- false, /* partial_inplace */
- MINUS_ONE, /* src_mask */
- MINUS_ONE, /* dst_mask */
- true), /* pcrel_offset */
- /* Skip 12 - 16; deprecated ECOFF relocs. */
- SKIP_HOWTO (12),
- SKIP_HOWTO (13),
- SKIP_HOWTO (14),
- SKIP_HOWTO (15),
- SKIP_HOWTO (16),
- /* The high 16 bits of the displacement from GP to the target. */
- HOWTO (R_ALPHA_GPRELHIGH,
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "GPRELHIGH", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* The low 16 bits of the displacement from GP to the target. */
- HOWTO (R_ALPHA_GPRELLOW,
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "GPRELLOW", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* A 16-bit displacement from the GP to the target. */
- HOWTO (R_ALPHA_GPREL16,
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "GPREL16", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* Skip 20 - 23; deprecated ECOFF relocs. */
- SKIP_HOWTO (20),
- SKIP_HOWTO (21),
- SKIP_HOWTO (22),
- SKIP_HOWTO (23),
- /* Misc ELF relocations. */
- /* A dynamic relocation to copy the target into our .dynbss section. */
- /* Not generated, as all Alpha objects use PIC, so it is not needed. It
- is present because every other ELF has one, but should not be used
- because .dynbss is an ugly thing. */
- HOWTO (R_ALPHA_COPY,
- 0,
- 0,
- 0,
- false,
- 0,
- complain_overflow_dont,
- bfd_elf_generic_reloc,
- "COPY",
- false,
- 0,
- 0,
- true),
- /* A dynamic relocation for a .got entry. */
- HOWTO (R_ALPHA_GLOB_DAT,
- 0,
- 0,
- 0,
- false,
- 0,
- complain_overflow_dont,
- bfd_elf_generic_reloc,
- "GLOB_DAT",
- false,
- 0,
- 0,
- true),
- /* A dynamic relocation for a .plt entry. */
- HOWTO (R_ALPHA_JMP_SLOT,
- 0,
- 0,
- 0,
- false,
- 0,
- complain_overflow_dont,
- bfd_elf_generic_reloc,
- "JMP_SLOT",
- false,
- 0,
- 0,
- true),
- /* A dynamic relocation to add the base of the DSO to a 64-bit field. */
- HOWTO (R_ALPHA_RELATIVE,
- 0,
- 0,
- 0,
- false,
- 0,
- complain_overflow_dont,
- bfd_elf_generic_reloc,
- "RELATIVE",
- false,
- 0,
- 0,
- true),
- /* A 21 bit branch that adjusts for gp loads. */
- HOWTO (R_ALPHA_BRSGP, /* type */
- 2, /* rightshift */
- 2, /* size (0 = byte, 1 = short, 2 = long) */
- 21, /* bitsize */
- true, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "BRSGP", /* name */
- false, /* partial_inplace */
- 0x1fffff, /* src_mask */
- 0x1fffff, /* dst_mask */
- true), /* pcrel_offset */
- /* Creates a tls_index for the symbol in the got. */
- HOWTO (R_ALPHA_TLSGD, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "TLSGD", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* Creates a tls_index for the (current) module in the got. */
- HOWTO (R_ALPHA_TLSLDM, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "TLSLDM", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* A dynamic relocation for a DTP module entry. */
- HOWTO (R_ALPHA_DTPMOD64, /* type */
- 0, /* rightshift */
- 4, /* size (0 = byte, 1 = short, 2 = long) */
- 64, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "DTPMOD64", /* name */
- false, /* partial_inplace */
- MINUS_ONE, /* src_mask */
- MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
- /* Creates a 64-bit offset in the got for the displacement
- from DTP to the target. */
- HOWTO (R_ALPHA_GOTDTPREL, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "GOTDTPREL", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* A dynamic relocation for a displacement from DTP to the target. */
- HOWTO (R_ALPHA_DTPREL64, /* type */
- 0, /* rightshift */
- 4, /* size (0 = byte, 1 = short, 2 = long) */
- 64, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "DTPREL64", /* name */
- false, /* partial_inplace */
- MINUS_ONE, /* src_mask */
- MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
- /* The high 16 bits of the displacement from DTP to the target. */
- HOWTO (R_ALPHA_DTPRELHI, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "DTPRELHI", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* The low 16 bits of the displacement from DTP to the target. */
- HOWTO (R_ALPHA_DTPRELLO, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "DTPRELLO", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* A 16-bit displacement from DTP to the target. */
- HOWTO (R_ALPHA_DTPREL16, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "DTPREL16", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* Creates a 64-bit offset in the got for the displacement
- from TP to the target. */
- HOWTO (R_ALPHA_GOTTPREL, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "GOTTPREL", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* A dynamic relocation for a displacement from TP to the target. */
- HOWTO (R_ALPHA_TPREL64, /* type */
- 0, /* rightshift */
- 4, /* size (0 = byte, 1 = short, 2 = long) */
- 64, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "TPREL64", /* name */
- false, /* partial_inplace */
- MINUS_ONE, /* src_mask */
- MINUS_ONE, /* dst_mask */
- false), /* pcrel_offset */
- /* The high 16 bits of the displacement from TP to the target. */
- HOWTO (R_ALPHA_TPRELHI, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "TPRELHI", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* The low 16 bits of the displacement from TP to the target. */
- HOWTO (R_ALPHA_TPRELLO, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "TPRELLO", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- /* A 16-bit displacement from TP to the target. */
- HOWTO (R_ALPHA_TPREL16, /* type */
- 0, /* rightshift */
- 1, /* size (0 = byte, 1 = short, 2 = long) */
- 16, /* bitsize */
- false, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_signed, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "TPREL16", /* name */
- false, /* partial_inplace */
- 0xffff, /* src_mask */
- 0xffff, /* dst_mask */
- false), /* pcrel_offset */
- };
- /* A mapping from BFD reloc types to Alpha ELF reloc types. */
- struct elf_reloc_map
- {
- bfd_reloc_code_real_type bfd_reloc_val;
- int elf_reloc_val;
- };
- static const struct elf_reloc_map elf64_alpha_reloc_map[] =
- {
- {BFD_RELOC_NONE, R_ALPHA_NONE},
- {BFD_RELOC_32, R_ALPHA_REFLONG},
- {BFD_RELOC_64, R_ALPHA_REFQUAD},
- {BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
- {BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
- {BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
- {BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
- {BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
- {BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
- {BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
- {BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
- {BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
- {BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
- {BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH},
- {BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW},
- {BFD_RELOC_GPREL16, R_ALPHA_GPREL16},
- {BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP},
- {BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD},
- {BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM},
- {BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64},
- {BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL},
- {BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64},
- {BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI},
- {BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO},
- {BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16},
- {BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL},
- {BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64},
- {BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI},
- {BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO},
- {BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16},
- };
- /* Given a BFD reloc type, return a HOWTO structure. */
- static reloc_howto_type *
- elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- bfd_reloc_code_real_type code)
- {
- const struct elf_reloc_map *i, *e;
- i = e = elf64_alpha_reloc_map;
- e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
- for (; i != e; ++i)
- {
- if (i->bfd_reloc_val == code)
- return &elf64_alpha_howto_table[i->elf_reloc_val];
- }
- return 0;
- }
- static reloc_howto_type *
- elf64_alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- const char *r_name)
- {
- unsigned int i;
- for (i = 0;
- i < (sizeof (elf64_alpha_howto_table)
- / sizeof (elf64_alpha_howto_table[0]));
- i++)
- if (elf64_alpha_howto_table[i].name != NULL
- && strcasecmp (elf64_alpha_howto_table[i].name, r_name) == 0)
- return &elf64_alpha_howto_table[i];
- return NULL;
- }
- /* Given an Alpha ELF reloc type, fill in an arelent structure. */
- static bool
- elf64_alpha_info_to_howto (bfd *abfd, arelent *cache_ptr,
- Elf_Internal_Rela *dst)
- {
- unsigned r_type = ELF64_R_TYPE(dst->r_info);
- if (r_type >= R_ALPHA_max)
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
- abfd, r_type);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- cache_ptr->howto = &elf64_alpha_howto_table[r_type];
- return true;
- }
- /* These two relocations create a two-word entry in the got. */
- #define alpha_got_entry_size(r_type) \
- (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
- /* This is PT_TLS segment p_vaddr. */
- #define alpha_get_dtprel_base(info) \
- (elf_hash_table (info)->tls_sec->vma)
- /* Main program TLS (whose template starts at PT_TLS p_vaddr)
- is assigned offset round(16, PT_TLS p_align). */
- #define alpha_get_tprel_base(info) \
- (elf_hash_table (info)->tls_sec->vma \
- - align_power ((bfd_vma) 16, \
- elf_hash_table (info)->tls_sec->alignment_power))
- /* Handle an Alpha specific section when reading an object file. This
- is called when bfd_section_from_shdr finds a section with an unknown
- type. */
- static bool
- elf64_alpha_section_from_shdr (bfd *abfd,
- Elf_Internal_Shdr *hdr,
- const char *name,
- int shindex)
- {
- asection *newsect;
- /* There ought to be a place to keep ELF backend specific flags, but
- at the moment there isn't one. We just keep track of the
- sections by their name, instead. Fortunately, the ABI gives
- suggested names for all the MIPS specific sections, so we will
- probably get away with this. */
- switch (hdr->sh_type)
- {
- case SHT_ALPHA_DEBUG:
- if (strcmp (name, ".mdebug") != 0)
- return false;
- break;
- default:
- return false;
- }
- if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
- return false;
- newsect = hdr->bfd_section;
- if (hdr->sh_type == SHT_ALPHA_DEBUG)
- {
- if (!bfd_set_section_flags (newsect,
- bfd_section_flags (newsect) | SEC_DEBUGGING))
- return false;
- }
- return true;
- }
- /* Convert Alpha specific section flags to bfd internal section flags. */
- static bool
- elf64_alpha_section_flags (const Elf_Internal_Shdr *hdr)
- {
- if (hdr->sh_flags & SHF_ALPHA_GPREL)
- hdr->bfd_section->flags |= SEC_SMALL_DATA;
- return true;
- }
- /* Set the correct type for an Alpha ELF section. We do this by the
- section name, which is a hack, but ought to work. */
- static bool
- elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec)
- {
- register const char *name;
- name = bfd_section_name (sec);
- if (strcmp (name, ".mdebug") == 0)
- {
- hdr->sh_type = SHT_ALPHA_DEBUG;
- /* In a shared object on Irix 5.3, the .mdebug section has an
- entsize of 0. FIXME: Does this matter? */
- if ((abfd->flags & DYNAMIC) != 0 )
- hdr->sh_entsize = 0;
- else
- hdr->sh_entsize = 1;
- }
- else if ((sec->flags & SEC_SMALL_DATA)
- || strcmp (name, ".sdata") == 0
- || strcmp (name, ".sbss") == 0
- || strcmp (name, ".lit4") == 0
- || strcmp (name, ".lit8") == 0)
- hdr->sh_flags |= SHF_ALPHA_GPREL;
- return true;
- }
- /* Hook called by the linker routine which adds symbols from an object
- file. We use it to put .comm items in .sbss, and not .bss. */
- static bool
- elf64_alpha_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
- Elf_Internal_Sym *sym,
- const char **namep ATTRIBUTE_UNUSED,
- flagword *flagsp ATTRIBUTE_UNUSED,
- asection **secp, bfd_vma *valp)
- {
- if (sym->st_shndx == SHN_COMMON
- && !bfd_link_relocatable (info)
- && sym->st_size <= elf_gp_size (abfd))
- {
- /* Common symbols less than or equal to -G nn bytes are
- automatically put into .sbss. */
- asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
- if (scomm == NULL)
- {
- scomm = bfd_make_section_with_flags (abfd, ".scommon",
- (SEC_ALLOC
- | SEC_IS_COMMON
- | SEC_SMALL_DATA
- | SEC_LINKER_CREATED));
- if (scomm == NULL)
- return false;
- }
- *secp = scomm;
- *valp = sym->st_size;
- }
- return true;
- }
- /* Create the .got section. */
- static bool
- elf64_alpha_create_got_section (bfd *abfd,
- struct bfd_link_info *info ATTRIBUTE_UNUSED)
- {
- flagword flags;
- asection *s;
- if (! is_alpha_elf (abfd))
- return false;
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED);
- s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
- if (s == NULL
- || !bfd_set_section_alignment (s, 3))
- return false;
- alpha_elf_tdata (abfd)->got = s;
- /* Make sure the object's gotobj is set to itself so that we default
- to every object with its own .got. We'll merge .gots later once
- we've collected each object's info. */
- alpha_elf_tdata (abfd)->gotobj = abfd;
- return true;
- }
- /* Create all the dynamic sections. */
- static bool
- elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
- {
- asection *s;
- flagword flags;
- struct elf_link_hash_entry *h;
- if (! is_alpha_elf (abfd))
- return false;
- /* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
- flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED
- | (elf64_alpha_use_secureplt ? SEC_READONLY : 0));
- s = bfd_make_section_anyway_with_flags (abfd, ".plt", flags);
- elf_hash_table (info)->splt = s;
- if (s == NULL || ! bfd_set_section_alignment (s, 4))
- return false;
- /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
- .plt section. */
- h = _bfd_elf_define_linkage_sym (abfd, info, s,
- "_PROCEDURE_LINKAGE_TABLE_");
- elf_hash_table (info)->hplt = h;
- if (h == NULL)
- return false;
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED | SEC_READONLY);
- s = bfd_make_section_anyway_with_flags (abfd, ".rela.plt", flags);
- elf_hash_table (info)->srelplt = s;
- if (s == NULL || ! bfd_set_section_alignment (s, 3))
- return false;
- if (elf64_alpha_use_secureplt)
- {
- flags = SEC_ALLOC | SEC_LINKER_CREATED;
- s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
- elf_hash_table (info)->sgotplt = s;
- if (s == NULL || ! bfd_set_section_alignment (s, 3))
- return false;
- }
- /* We may or may not have created a .got section for this object, but
- we definitely havn't done the rest of the work. */
- if (alpha_elf_tdata(abfd)->gotobj == NULL)
- {
- if (!elf64_alpha_create_got_section (abfd, info))
- return false;
- }
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED | SEC_READONLY);
- s = bfd_make_section_anyway_with_flags (abfd, ".rela.got", flags);
- elf_hash_table (info)->srelgot = s;
- if (s == NULL
- || !bfd_set_section_alignment (s, 3))
- return false;
- /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
- dynobj's .got section. We don't do this in the linker script
- because we don't want to define the symbol if we are not creating
- a global offset table. */
- h = _bfd_elf_define_linkage_sym (abfd, info, alpha_elf_tdata(abfd)->got,
- "_GLOBAL_OFFSET_TABLE_");
- elf_hash_table (info)->hgot = h;
- if (h == NULL)
- return false;
- return true;
- }
- /* Read ECOFF debugging information from a .mdebug section into a
- ecoff_debug_info structure. */
- static bool
- elf64_alpha_read_ecoff_info (bfd *abfd, asection *section,
- struct ecoff_debug_info *debug)
- {
- HDRR *symhdr;
- const struct ecoff_debug_swap *swap;
- char *ext_hdr = NULL;
- swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
- memset (debug, 0, sizeof (*debug));
- ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
- if (ext_hdr == NULL && swap->external_hdr_size != 0)
- goto error_return;
- if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
- swap->external_hdr_size))
- goto error_return;
- symhdr = &debug->symbolic_header;
- (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
- /* The symbolic header contains absolute file offsets and sizes to
- read. */
- #define READ(ptr, offset, count, size, type) \
- do \
- { \
- size_t amt; \
- debug->ptr = NULL; \
- if (symhdr->count == 0) \
- break; \
- if (_bfd_mul_overflow (size, symhdr->count, &amt)) \
- { \
- bfd_set_error (bfd_error_file_too_big); \
- goto error_return; \
- } \
- if (bfd_seek (abfd, symhdr->offset, SEEK_SET) != 0) \
- goto error_return; \
- debug->ptr = (type) _bfd_malloc_and_read (abfd, amt, amt); \
- if (debug->ptr == NULL) \
- goto error_return; \
- } while (0)
- READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
- READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, void *);
- READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, void *);
- READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, void *);
- READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, void *);
- READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
- union aux_ext *);
- READ (ss, cbSsOffset, issMax, sizeof (char), char *);
- READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
- READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, void *);
- READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, void *);
- READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, void *);
- #undef READ
- debug->fdr = NULL;
- return true;
- error_return:
- free (ext_hdr);
- free (debug->line);
- free (debug->external_dnr);
- free (debug->external_pdr);
- free (debug->external_sym);
- free (debug->external_opt);
- free (debug->external_aux);
- free (debug->ss);
- free (debug->ssext);
- free (debug->external_fdr);
- free (debug->external_rfd);
- free (debug->external_ext);
- return false;
- }
- /* Alpha ELF local labels start with '$'. */
- static bool
- elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
- {
- return name[0] == '$';
- }
- static bool
- elf64_alpha_find_nearest_line (bfd *abfd, asymbol **symbols,
- asection *section, bfd_vma offset,
- const char **filename_ptr,
- const char **functionname_ptr,
- unsigned int *line_ptr,
- unsigned int *discriminator_ptr)
- {
- asection *msec;
- if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
- filename_ptr, functionname_ptr,
- line_ptr, discriminator_ptr,
- dwarf_debug_sections,
- &elf_tdata (abfd)->dwarf2_find_line_info)
- == 1)
- return true;
- msec = bfd_get_section_by_name (abfd, ".mdebug");
- if (msec != NULL)
- {
- flagword origflags;
- struct alpha_elf_find_line *fi;
- const struct ecoff_debug_swap * const swap =
- get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
- /* If we are called during a link, alpha_elf_final_link may have
- cleared the SEC_HAS_CONTENTS field. We force it back on here
- if appropriate (which it normally will be). */
- origflags = msec->flags;
- if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
- msec->flags |= SEC_HAS_CONTENTS;
- fi = alpha_elf_tdata (abfd)->find_line_info;
- if (fi == NULL)
- {
- bfd_size_type external_fdr_size;
- char *fraw_src;
- char *fraw_end;
- struct fdr *fdr_ptr;
- bfd_size_type amt = sizeof (struct alpha_elf_find_line);
- fi = (struct alpha_elf_find_line *) bfd_zalloc (abfd, amt);
- if (fi == NULL)
- {
- msec->flags = origflags;
- return false;
- }
- if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
- {
- msec->flags = origflags;
- return false;
- }
- /* Swap in the FDR information. */
- amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
- fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt);
- if (fi->d.fdr == NULL)
- {
- msec->flags = origflags;
- return false;
- }
- external_fdr_size = swap->external_fdr_size;
- fdr_ptr = fi->d.fdr;
- fraw_src = (char *) fi->d.external_fdr;
- fraw_end = (fraw_src
- + fi->d.symbolic_header.ifdMax * external_fdr_size);
- for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
- (*swap->swap_fdr_in) (abfd, fraw_src, fdr_ptr);
- alpha_elf_tdata (abfd)->find_line_info = fi;
- /* Note that we don't bother to ever free this information.
- find_nearest_line is either called all the time, as in
- objdump -l, so the information should be saved, or it is
- rarely called, as in ld error messages, so the memory
- wasted is unimportant. Still, it would probably be a
- good idea for free_cached_info to throw it away. */
- }
- if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
- &fi->i, filename_ptr, functionname_ptr,
- line_ptr))
- {
- msec->flags = origflags;
- return true;
- }
- msec->flags = origflags;
- }
- /* Fall back on the generic ELF find_nearest_line routine. */
- return _bfd_elf_find_nearest_line (abfd, symbols, section, offset,
- filename_ptr, functionname_ptr,
- line_ptr, discriminator_ptr);
- }
- /* Structure used to pass information to alpha_elf_output_extsym. */
- struct extsym_info
- {
- bfd *abfd;
- struct bfd_link_info *info;
- struct ecoff_debug_info *debug;
- const struct ecoff_debug_swap *swap;
- bool failed;
- };
- static bool
- elf64_alpha_output_extsym (struct elf_link_hash_entry *x, void * data)
- {
- struct alpha_elf_link_hash_entry *h = (struct alpha_elf_link_hash_entry *) x;
- struct extsym_info *einfo = (struct extsym_info *) data;
- bool strip;
- asection *sec, *output_section;
- if (h->root.indx == -2)
- strip = false;
- else if ((h->root.def_dynamic
- || h->root.ref_dynamic
- || h->root.root.type == bfd_link_hash_new)
- && !h->root.def_regular
- && !h->root.ref_regular)
- strip = true;
- else if (einfo->info->strip == strip_all
- || (einfo->info->strip == strip_some
- && bfd_hash_lookup (einfo->info->keep_hash,
- h->root.root.root.string,
- false, false) == NULL))
- strip = true;
- else
- strip = false;
- if (strip)
- return true;
- if (h->esym.ifd == -2)
- {
- h->esym.jmptbl = 0;
- h->esym.cobol_main = 0;
- h->esym.weakext = 0;
- h->esym.reserved = 0;
- h->esym.ifd = ifdNil;
- h->esym.asym.value = 0;
- h->esym.asym.st = stGlobal;
- if (h->root.root.type != bfd_link_hash_defined
- && h->root.root.type != bfd_link_hash_defweak)
- h->esym.asym.sc = scAbs;
- else
- {
- const char *name;
- sec = h->root.root.u.def.section;
- output_section = sec->output_section;
- /* When making a shared library and symbol h is the one from
- the another shared library, OUTPUT_SECTION may be null. */
- if (output_section == NULL)
- h->esym.asym.sc = scUndefined;
- else
- {
- name = bfd_section_name (output_section);
- if (strcmp (name, ".text") == 0)
- h->esym.asym.sc = scText;
- else if (strcmp (name, ".data") == 0)
- h->esym.asym.sc = scData;
- else if (strcmp (name, ".sdata") == 0)
- h->esym.asym.sc = scSData;
- else if (strcmp (name, ".rodata") == 0
- || strcmp (name, ".rdata") == 0)
- h->esym.asym.sc = scRData;
- else if (strcmp (name, ".bss") == 0)
- h->esym.asym.sc = scBss;
- else if (strcmp (name, ".sbss") == 0)
- h->esym.asym.sc = scSBss;
- else if (strcmp (name, ".init") == 0)
- h->esym.asym.sc = scInit;
- else if (strcmp (name, ".fini") == 0)
- h->esym.asym.sc = scFini;
- else
- h->esym.asym.sc = scAbs;
- }
- }
- h->esym.asym.reserved = 0;
- h->esym.asym.index = indexNil;
- }
- if (h->root.root.type == bfd_link_hash_common)
- h->esym.asym.value = h->root.root.u.c.size;
- else if (h->root.root.type == bfd_link_hash_defined
- || h->root.root.type == bfd_link_hash_defweak)
- {
- if (h->esym.asym.sc == scCommon)
- h->esym.asym.sc = scBss;
- else if (h->esym.asym.sc == scSCommon)
- h->esym.asym.sc = scSBss;
- sec = h->root.root.u.def.section;
- output_section = sec->output_section;
- if (output_section != NULL)
- h->esym.asym.value = (h->root.root.u.def.value
- + sec->output_offset
- + output_section->vma);
- else
- h->esym.asym.value = 0;
- }
- if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
- h->root.root.root.string,
- &h->esym))
- {
- einfo->failed = true;
- return false;
- }
- return true;
- }
- /* Search for and possibly create a got entry. */
- static struct alpha_elf_got_entry *
- get_got_entry (bfd *abfd, struct alpha_elf_link_hash_entry *h,
- unsigned long r_type, unsigned long r_symndx,
- bfd_vma r_addend)
- {
- struct alpha_elf_got_entry *gotent;
- struct alpha_elf_got_entry **slot;
- if (h)
- slot = &h->got_entries;
- else
- {
- /* This is a local .got entry -- record for merge. */
- struct alpha_elf_got_entry **local_got_entries;
- local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
- if (!local_got_entries)
- {
- bfd_size_type size;
- Elf_Internal_Shdr *symtab_hdr;
- symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
- size = symtab_hdr->sh_info;
- size *= sizeof (struct alpha_elf_got_entry *);
- local_got_entries
- = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size);
- if (!local_got_entries)
- return NULL;
- alpha_elf_tdata (abfd)->local_got_entries = local_got_entries;
- }
- slot = &local_got_entries[r_symndx];
- }
- for (gotent = *slot; gotent ; gotent = gotent->next)
- if (gotent->gotobj == abfd
- && gotent->reloc_type == r_type
- && gotent->addend == r_addend)
- break;
- if (!gotent)
- {
- int entry_size;
- size_t amt;
- amt = sizeof (struct alpha_elf_got_entry);
- gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt);
- if (!gotent)
- return NULL;
- gotent->gotobj = abfd;
- gotent->addend = r_addend;
- gotent->got_offset = -1;
- gotent->plt_offset = -1;
- gotent->use_count = 1;
- gotent->reloc_type = r_type;
- gotent->reloc_done = 0;
- gotent->reloc_xlated = 0;
- gotent->next = *slot;
- *slot = gotent;
- entry_size = alpha_got_entry_size (r_type);
- alpha_elf_tdata (abfd)->total_got_size += entry_size;
- if (!h)
- alpha_elf_tdata(abfd)->local_got_size += entry_size;
- }
- else
- gotent->use_count += 1;
- return gotent;
- }
- static bool
- elf64_alpha_want_plt (struct alpha_elf_link_hash_entry *ah)
- {
- return ((ah->root.type == STT_FUNC
- || ah->root.root.type == bfd_link_hash_undefweak
- || ah->root.root.type == bfd_link_hash_undefined)
- && (ah->flags & ALPHA_ELF_LINK_HASH_LU_PLT) != 0
- && (ah->flags & ~ALPHA_ELF_LINK_HASH_LU_PLT) == 0);
- }
- /* Whether to sort relocs output by ld -r or ld --emit-relocs, by r_offset.
- Don't do so for code sections. We want to keep ordering of LITERAL/LITUSE
- as is. On the other hand, elf-eh-frame.c processing requires .eh_frame
- relocs to be sorted. */
- static bool
- elf64_alpha_sort_relocs_p (asection *sec)
- {
- return (sec->flags & SEC_CODE) == 0;
- }
- /* Handle dynamic relocations when doing an Alpha ELF link. */
- static bool
- elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info,
- asection *sec, const Elf_Internal_Rela *relocs)
- {
- bfd *dynobj;
- asection *sreloc;
- Elf_Internal_Shdr *symtab_hdr;
- struct alpha_elf_link_hash_entry **sym_hashes;
- const Elf_Internal_Rela *rel, *relend;
- if (bfd_link_relocatable (info))
- return true;
- BFD_ASSERT (is_alpha_elf (abfd));
- dynobj = elf_hash_table (info)->dynobj;
- if (dynobj == NULL)
- elf_hash_table (info)->dynobj = dynobj = abfd;
- sreloc = NULL;
- symtab_hdr = &elf_symtab_hdr (abfd);
- sym_hashes = alpha_elf_sym_hashes (abfd);
- relend = relocs + sec->reloc_count;
- for (rel = relocs; rel < relend; ++rel)
- {
- enum {
- NEED_GOT = 1,
- NEED_GOT_ENTRY = 2,
- NEED_DYNREL = 4
- };
- unsigned long r_symndx, r_type;
- struct alpha_elf_link_hash_entry *h;
- unsigned int gotent_flags;
- bool maybe_dynamic;
- unsigned int need;
- bfd_vma addend;
- r_symndx = ELF64_R_SYM (rel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- else
- {
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
- /* PR15323, ref flags aren't set for references in the same
- object. */
- h->root.ref_regular = 1;
- }
- /* We can only get preliminary data on whether a symbol is
- locally or externally defined, as not all of the input files
- have yet been processed. Do something with what we know, as
- this may help reduce memory usage and processing time later. */
- maybe_dynamic = false;
- if (h && ((bfd_link_pic (info)
- && (!info->symbolic
- || info->unresolved_syms_in_shared_libs == RM_IGNORE))
- || !h->root.def_regular
- || h->root.root.type == bfd_link_hash_defweak))
- maybe_dynamic = true;
- need = 0;
- gotent_flags = 0;
- r_type = ELF64_R_TYPE (rel->r_info);
- addend = rel->r_addend;
- switch (r_type)
- {
- case R_ALPHA_LITERAL:
- need = NEED_GOT | NEED_GOT_ENTRY;
- /* Remember how this literal is used from its LITUSEs.
- This will be important when it comes to decide if we can
- create a .plt entry for a function symbol. */
- while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE)
- if (rel->r_addend >= 1 && rel->r_addend <= 6)
- gotent_flags |= 1 << rel->r_addend;
- --rel;
- /* No LITUSEs -- presumably the address is used somehow. */
- if (gotent_flags == 0)
- gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
- break;
- case R_ALPHA_GPDISP:
- case R_ALPHA_GPREL16:
- case R_ALPHA_GPREL32:
- case R_ALPHA_GPRELHIGH:
- case R_ALPHA_GPRELLOW:
- case R_ALPHA_BRSGP:
- need = NEED_GOT;
- break;
- case R_ALPHA_REFLONG:
- case R_ALPHA_REFQUAD:
- if (bfd_link_pic (info) || maybe_dynamic)
- need = NEED_DYNREL;
- break;
- case R_ALPHA_TLSLDM:
- /* The symbol for a TLSLDM reloc is ignored. Collapse the
- reloc to the STN_UNDEF (0) symbol so that they all match. */
- r_symndx = STN_UNDEF;
- h = 0;
- maybe_dynamic = false;
- /* FALLTHRU */
- case R_ALPHA_TLSGD:
- case R_ALPHA_GOTDTPREL:
- need = NEED_GOT | NEED_GOT_ENTRY;
- break;
- case R_ALPHA_GOTTPREL:
- need = NEED_GOT | NEED_GOT_ENTRY;
- gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE;
- if (bfd_link_pic (info))
- info->flags |= DF_STATIC_TLS;
- break;
- case R_ALPHA_TPREL64:
- if (bfd_link_dll (info))
- {
- info->flags |= DF_STATIC_TLS;
- need = NEED_DYNREL;
- }
- else if (maybe_dynamic)
- need = NEED_DYNREL;
- break;
- }
- if (need & NEED_GOT)
- {
- if (alpha_elf_tdata(abfd)->gotobj == NULL)
- {
- if (!elf64_alpha_create_got_section (abfd, info))
- return false;
- }
- }
- if (need & NEED_GOT_ENTRY)
- {
- struct alpha_elf_got_entry *gotent;
- gotent = get_got_entry (abfd, h, r_type, r_symndx, addend);
- if (!gotent)
- return false;
- if (gotent_flags)
- {
- gotent->flags |= gotent_flags;
- if (h)
- {
- gotent_flags |= h->flags;
- h->flags = gotent_flags;
- /* Make a guess as to whether a .plt entry is needed. */
- /* ??? It appears that we won't make it into
- adjust_dynamic_symbol for symbols that remain
- totally undefined. Copying this check here means
- we can create a plt entry for them too. */
- h->root.needs_plt
- = (maybe_dynamic && elf64_alpha_want_plt (h));
- }
- }
- }
- if (need & NEED_DYNREL)
- {
- /* We need to create the section here now whether we eventually
- use it or not so that it gets mapped to an output section by
- the linker. If not used, we'll kill it in size_dynamic_sections. */
- if (sreloc == NULL)
- {
- sreloc = _bfd_elf_make_dynamic_reloc_section
- (sec, dynobj, 3, abfd, /*rela?*/ true);
- if (sreloc == NULL)
- return false;
- }
- if (h)
- {
- /* Since we havn't seen all of the input symbols yet, we
- don't know whether we'll actually need a dynamic relocation
- entry for this reloc. So make a record of it. Once we
- find out if this thing needs dynamic relocation we'll
- expand the relocation sections by the appropriate amount. */
- struct alpha_elf_reloc_entry *rent;
- for (rent = h->reloc_entries; rent; rent = rent->next)
- if (rent->rtype == r_type && rent->srel == sreloc)
- break;
- if (!rent)
- {
- size_t amt = sizeof (struct alpha_elf_reloc_entry);
- rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
- if (!rent)
- return false;
- rent->srel = sreloc;
- rent->sec = sec;
- rent->rtype = r_type;
- rent->count = 1;
- rent->next = h->reloc_entries;
- h->reloc_entries = rent;
- }
- else
- rent->count++;
- }
- else if (bfd_link_pic (info))
- {
- /* If this is a shared library, and the section is to be
- loaded into memory, we need a RELATIVE reloc. */
- sreloc->size += sizeof (Elf64_External_Rela);
- if (sec->flags & SEC_READONLY)
- {
- info->flags |= DF_TEXTREL;
- info->callbacks->minfo
- (_("%pB: dynamic relocation against `%pT' in "
- "read-only section `%pA'\n"),
- sec->owner, h->root.root.root.string, sec);
- }
- }
- }
- }
- return true;
- }
- /* Return the section that should be marked against GC for a given
- relocation. */
- static asection *
- elf64_alpha_gc_mark_hook (asection *sec, struct bfd_link_info *info,
- Elf_Internal_Rela *rel,
- struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)
- {
- /* These relocations don't really reference a symbol. Instead we store
- extra data in their addend slot. Ignore the symbol. */
- switch (ELF64_R_TYPE (rel->r_info))
- {
- case R_ALPHA_LITUSE:
- case R_ALPHA_GPDISP:
- case R_ALPHA_HINT:
- return NULL;
- }
- return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
- }
- /* Adjust a symbol defined by a dynamic object and referenced by a
- regular object. The current definition is in some section of the
- dynamic object, but we're not including those sections. We have to
- change the definition to something the rest of the link can
- understand. */
- static bool
- elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *h)
- {
- bfd *dynobj;
- asection *s;
- struct alpha_elf_link_hash_entry *ah;
- dynobj = elf_hash_table(info)->dynobj;
- ah = (struct alpha_elf_link_hash_entry *)h;
- /* Now that we've seen all of the input symbols, finalize our decision
- about whether this symbol should get a .plt entry. Irritatingly, it
- is common for folk to leave undefined symbols in shared libraries,
- and they still expect lazy binding; accept undefined symbols in lieu
- of STT_FUNC. */
- if (alpha_elf_dynamic_symbol_p (h, info) && elf64_alpha_want_plt (ah))
- {
- h->needs_plt = true;
- s = elf_hash_table(info)->splt;
- if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
- return false;
- /* We need one plt entry per got subsection. Delay allocation of
- the actual plt entries until size_plt_section, called from
- size_dynamic_sections or during relaxation. */
- return true;
- }
- else
- h->needs_plt = false;
- /* If this is a weak symbol, and there is a real definition, the
- processor independent code will have arranged for us to see the
- real definition first, and we can just use the same value. */
- if (h->is_weakalias)
- {
- struct elf_link_hash_entry *def = weakdef (h);
- BFD_ASSERT (def->root.type == bfd_link_hash_defined);
- h->root.u.def.section = def->root.u.def.section;
- h->root.u.def.value = def->root.u.def.value;
- return true;
- }
- /* This is a reference to a symbol defined by a dynamic object which
- is not a function. The Alpha, since it uses .got entries for all
- symbols even in regular objects, does not need the hackery of a
- .dynbss section and COPY dynamic relocations. */
- return true;
- }
- /* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
- static void
- elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry *h,
- unsigned int st_other,
- bool definition,
- bool dynamic)
- {
- if (!dynamic && definition)
- h->other = ((h->other & ELF_ST_VISIBILITY (-1))
- | (st_other & ~ELF_ST_VISIBILITY (-1)));
- }
- /* Symbol versioning can create new symbols, and make our old symbols
- indirect to the new ones. Consolidate the got and reloc information
- in these situations. */
- static void
- elf64_alpha_copy_indirect_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *dir,
- struct elf_link_hash_entry *ind)
- {
- struct alpha_elf_link_hash_entry *hi
- = (struct alpha_elf_link_hash_entry *) ind;
- struct alpha_elf_link_hash_entry *hs
- = (struct alpha_elf_link_hash_entry *) dir;
- /* Do the merging in the superclass. */
- _bfd_elf_link_hash_copy_indirect(info, dir, ind);
- /* Merge the flags. Whee. */
- hs->flags |= hi->flags;
- /* ??? It's unclear to me what's really supposed to happen when
- "merging" defweak and defined symbols, given that we don't
- actually throw away the defweak. This more-or-less copies
- the logic related to got and plt entries in the superclass. */
- if (ind->root.type != bfd_link_hash_indirect)
- return;
- /* Merge the .got entries. Cannibalize the old symbol's list in
- doing so, since we don't need it anymore. */
- if (hs->got_entries == NULL)
- hs->got_entries = hi->got_entries;
- else
- {
- struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
- gsh = hs->got_entries;
- for (gi = hi->got_entries; gi ; gi = gin)
- {
- gin = gi->next;
- for (gs = gsh; gs ; gs = gs->next)
- if (gi->gotobj == gs->gotobj
- && gi->reloc_type == gs->reloc_type
- && gi->addend == gs->addend)
- {
- gs->use_count += gi->use_count;
- goto got_found;
- }
- gi->next = hs->got_entries;
- hs->got_entries = gi;
- got_found:;
- }
- }
- hi->got_entries = NULL;
- /* And similar for the reloc entries. */
- if (hs->reloc_entries == NULL)
- hs->reloc_entries = hi->reloc_entries;
- else
- {
- struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
- rsh = hs->reloc_entries;
- for (ri = hi->reloc_entries; ri ; ri = rin)
- {
- rin = ri->next;
- for (rs = rsh; rs ; rs = rs->next)
- if (ri->rtype == rs->rtype && ri->srel == rs->srel)
- {
- rs->count += ri->count;
- goto found_reloc;
- }
- ri->next = hs->reloc_entries;
- hs->reloc_entries = ri;
- found_reloc:;
- }
- }
- hi->reloc_entries = NULL;
- }
- /* Is it possible to merge two object file's .got tables? */
- static bool
- elf64_alpha_can_merge_gots (bfd *a, bfd *b)
- {
- int total = alpha_elf_tdata (a)->total_got_size;
- bfd *bsub;
- /* Trivial quick fallout test. */
- if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE)
- return true;
- /* By their nature, local .got entries cannot be merged. */
- if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE)
- return false;
- /* Failing the common trivial comparison, we must effectively
- perform the merge. Not actually performing the merge means that
- we don't have to store undo information in case we fail. */
- for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
- {
- struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
- Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
- int i, n;
- n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
- for (i = 0; i < n; ++i)
- {
- struct alpha_elf_got_entry *ae, *be;
- struct alpha_elf_link_hash_entry *h;
- h = hashes[i];
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
- for (be = h->got_entries; be ; be = be->next)
- {
- if (be->use_count == 0)
- continue;
- if (be->gotobj != b)
- continue;
- for (ae = h->got_entries; ae ; ae = ae->next)
- if (ae->gotobj == a
- && ae->reloc_type == be->reloc_type
- && ae->addend == be->addend)
- goto global_found;
- total += alpha_got_entry_size (be->reloc_type);
- if (total > MAX_GOT_SIZE)
- return false;
- global_found:;
- }
- }
- }
- return true;
- }
- /* Actually merge two .got tables. */
- static void
- elf64_alpha_merge_gots (bfd *a, bfd *b)
- {
- int total = alpha_elf_tdata (a)->total_got_size;
- bfd *bsub;
- /* Remember local expansion. */
- {
- int e = alpha_elf_tdata (b)->local_got_size;
- total += e;
- alpha_elf_tdata (a)->local_got_size += e;
- }
- for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
- {
- struct alpha_elf_got_entry **local_got_entries;
- struct alpha_elf_link_hash_entry **hashes;
- Elf_Internal_Shdr *symtab_hdr;
- int i, n;
- /* Let the local .got entries know they are part of a new subsegment. */
- local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
- if (local_got_entries)
- {
- n = elf_tdata (bsub)->symtab_hdr.sh_info;
- for (i = 0; i < n; ++i)
- {
- struct alpha_elf_got_entry *ent;
- for (ent = local_got_entries[i]; ent; ent = ent->next)
- ent->gotobj = a;
- }
- }
- /* Merge the global .got entries. */
- hashes = alpha_elf_sym_hashes (bsub);
- symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
- n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
- for (i = 0; i < n; ++i)
- {
- struct alpha_elf_got_entry *ae, *be, **pbe, **start;
- struct alpha_elf_link_hash_entry *h;
- h = hashes[i];
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
- pbe = start = &h->got_entries;
- while ((be = *pbe) != NULL)
- {
- if (be->use_count == 0)
- {
- *pbe = be->next;
- memset (be, 0xa5, sizeof (*be));
- goto kill;
- }
- if (be->gotobj != b)
- goto next;
- for (ae = *start; ae ; ae = ae->next)
- if (ae->gotobj == a
- && ae->reloc_type == be->reloc_type
- && ae->addend == be->addend)
- {
- ae->flags |= be->flags;
- ae->use_count += be->use_count;
- *pbe = be->next;
- memset (be, 0xa5, sizeof (*be));
- goto kill;
- }
- be->gotobj = a;
- total += alpha_got_entry_size (be->reloc_type);
- next:;
- pbe = &be->next;
- kill:;
- }
- }
- alpha_elf_tdata (bsub)->gotobj = a;
- }
- alpha_elf_tdata (a)->total_got_size = total;
- /* Merge the two in_got chains. */
- {
- bfd *next;
- bsub = a;
- while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
- bsub = next;
- alpha_elf_tdata (bsub)->in_got_link_next = b;
- }
- }
- /* Calculate the offsets for the got entries. */
- static bool
- elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h,
- void * arg ATTRIBUTE_UNUSED)
- {
- struct alpha_elf_got_entry *gotent;
- for (gotent = h->got_entries; gotent; gotent = gotent->next)
- if (gotent->use_count > 0)
- {
- struct alpha_elf_obj_tdata *td;
- bfd_size_type *plge;
- td = alpha_elf_tdata (gotent->gotobj);
- plge = &td->got->size;
- gotent->got_offset = *plge;
- *plge += alpha_got_entry_size (gotent->reloc_type);
- }
- return true;
- }
- static void
- elf64_alpha_calc_got_offsets (struct bfd_link_info *info)
- {
- bfd *i, *got_list;
- struct alpha_elf_link_hash_table * htab;
- htab = alpha_elf_hash_table (info);
- if (htab == NULL)
- return;
- got_list = htab->got_list;
- /* First, zero out the .got sizes, as we may be recalculating the
- .got after optimizing it. */
- for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
- alpha_elf_tdata(i)->got->size = 0;
- /* Next, fill in the offsets for all the global entries. */
- alpha_elf_link_hash_traverse (htab,
- elf64_alpha_calc_got_offsets_for_symbol,
- NULL);
- /* Finally, fill in the offsets for the local entries. */
- for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
- {
- bfd_size_type got_offset = alpha_elf_tdata(i)->got->size;
- bfd *j;
- for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
- {
- struct alpha_elf_got_entry **local_got_entries, *gotent;
- int k, n;
- local_got_entries = alpha_elf_tdata(j)->local_got_entries;
- if (!local_got_entries)
- continue;
- for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
- for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
- if (gotent->use_count > 0)
- {
- gotent->got_offset = got_offset;
- got_offset += alpha_got_entry_size (gotent->reloc_type);
- }
- }
- alpha_elf_tdata(i)->got->size = got_offset;
- }
- }
- /* Constructs the gots. */
- static bool
- elf64_alpha_size_got_sections (struct bfd_link_info *info,
- bool may_merge)
- {
- bfd *i, *got_list, *cur_got_obj = NULL;
- struct alpha_elf_link_hash_table * htab;
- htab = alpha_elf_hash_table (info);
- if (htab == NULL)
- return false;
- got_list = htab->got_list;
- /* On the first time through, pretend we have an existing got list
- consisting of all of the input files. */
- if (got_list == NULL)
- {
- for (i = info->input_bfds; i ; i = i->link.next)
- {
- bfd *this_got;
- if (! is_alpha_elf (i))
- continue;
- this_got = alpha_elf_tdata (i)->gotobj;
- if (this_got == NULL)
- continue;
- /* We are assuming no merging has yet occurred. */
- BFD_ASSERT (this_got == i);
- if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE)
- {
- /* Yikes! A single object file has too many entries. */
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: .got subsegment exceeds 64K (size %d)"),
- i, alpha_elf_tdata (this_got)->total_got_size);
- return false;
- }
- if (got_list == NULL)
- got_list = this_got;
- else
- alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
- cur_got_obj = this_got;
- }
- /* Strange degenerate case of no got references. */
- if (got_list == NULL)
- return true;
- htab->got_list = got_list;
- }
- cur_got_obj = got_list;
- if (cur_got_obj == NULL)
- return false;
- if (may_merge)
- {
- i = alpha_elf_tdata(cur_got_obj)->got_link_next;
- while (i != NULL)
- {
- if (elf64_alpha_can_merge_gots (cur_got_obj, i))
- {
- elf64_alpha_merge_gots (cur_got_obj, i);
- alpha_elf_tdata(i)->got->size = 0;
- i = alpha_elf_tdata(i)->got_link_next;
- alpha_elf_tdata(cur_got_obj)->got_link_next = i;
- }
- else
- {
- cur_got_obj = i;
- i = alpha_elf_tdata(i)->got_link_next;
- }
- }
- }
- /* Once the gots have been merged, fill in the got offsets for
- everything therein. */
- elf64_alpha_calc_got_offsets (info);
- return true;
- }
- static bool
- elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h,
- void * data)
- {
- asection *splt = (asection *) data;
- struct alpha_elf_got_entry *gotent;
- bool saw_one = false;
- /* If we didn't need an entry before, we still don't. */
- if (!h->root.needs_plt)
- return true;
- /* For each LITERAL got entry still in use, allocate a plt entry. */
- for (gotent = h->got_entries; gotent ; gotent = gotent->next)
- if (gotent->reloc_type == R_ALPHA_LITERAL
- && gotent->use_count > 0)
- {
- if (splt->size == 0)
- splt->size = PLT_HEADER_SIZE;
- gotent->plt_offset = splt->size;
- splt->size += PLT_ENTRY_SIZE;
- saw_one = true;
- }
- /* If there weren't any, there's no longer a need for the PLT entry. */
- if (!saw_one)
- h->root.needs_plt = false;
- return true;
- }
- /* Called from relax_section to rebuild the PLT in light of potential changes
- in the function's status. */
- static void
- elf64_alpha_size_plt_section (struct bfd_link_info *info)
- {
- asection *splt, *spltrel, *sgotplt;
- unsigned long entries;
- struct alpha_elf_link_hash_table * htab;
- htab = alpha_elf_hash_table (info);
- if (htab == NULL)
- return;
- splt = elf_hash_table(info)->splt;
- if (splt == NULL)
- return;
- splt->size = 0;
- alpha_elf_link_hash_traverse (htab,
- elf64_alpha_size_plt_section_1, splt);
- /* Every plt entry requires a JMP_SLOT relocation. */
- spltrel = elf_hash_table(info)->srelplt;
- entries = 0;
- if (splt->size)
- {
- if (elf64_alpha_use_secureplt)
- entries = (splt->size - NEW_PLT_HEADER_SIZE) / NEW_PLT_ENTRY_SIZE;
- else
- entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE;
- }
- spltrel->size = entries * sizeof (Elf64_External_Rela);
- /* When using the secureplt, we need two words somewhere in the data
- segment for the dynamic linker to tell us where to go. This is the
- entire contents of the .got.plt section. */
- if (elf64_alpha_use_secureplt)
- {
- sgotplt = elf_hash_table(info)->sgotplt;
- sgotplt->size = entries ? 16 : 0;
- }
- }
- static bool
- elf64_alpha_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
- struct bfd_link_info *info)
- {
- bfd *i;
- struct alpha_elf_link_hash_table * htab;
- if (bfd_link_relocatable (info))
- return true;
- htab = alpha_elf_hash_table (info);
- if (htab == NULL)
- return false;
- if (!elf64_alpha_size_got_sections (info, true))
- return false;
- /* Allocate space for all of the .got subsections. */
- i = htab->got_list;
- for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
- {
- asection *s = alpha_elf_tdata(i)->got;
- if (s->size > 0)
- {
- s->contents = (bfd_byte *) bfd_zalloc (i, s->size);
- if (s->contents == NULL)
- return false;
- }
- }
- return true;
- }
- /* The number of dynamic relocations required by a static relocation. */
- static int
- alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared, int pie)
- {
- switch (r_type)
- {
- /* May appear in GOT entries. */
- case R_ALPHA_TLSGD:
- return (dynamic ? 2 : shared ? 1 : 0);
- case R_ALPHA_TLSLDM:
- return shared;
- case R_ALPHA_LITERAL:
- return dynamic || shared;
- case R_ALPHA_GOTTPREL:
- return dynamic || (shared && !pie);
- case R_ALPHA_GOTDTPREL:
- return dynamic;
- /* May appear in data sections. */
- case R_ALPHA_REFLONG:
- case R_ALPHA_REFQUAD:
- return dynamic || shared;
- case R_ALPHA_TPREL64:
- return dynamic || (shared && !pie);
- /* Everything else is illegal. We'll issue an error during
- relocate_section. */
- default:
- return 0;
- }
- }
- /* Work out the sizes of the dynamic relocation entries. */
- static bool
- elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry *h,
- struct bfd_link_info *info)
- {
- bool dynamic;
- struct alpha_elf_reloc_entry *relent;
- unsigned long entries;
- /* If the symbol was defined as a common symbol in a regular object
- file, and there was no definition in any dynamic object, then the
- linker will have allocated space for the symbol in a common
- section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
- set. This is done for dynamic symbols in
- elf_adjust_dynamic_symbol but this is not done for non-dynamic
- symbols, somehow. */
- if (!h->root.def_regular
- && h->root.ref_regular
- && !h->root.def_dynamic
- && (h->root.root.type == bfd_link_hash_defined
- || h->root.root.type == bfd_link_hash_defweak)
- && !(h->root.root.u.def.section->owner->flags & DYNAMIC))
- h->root.def_regular = 1;
- /* If the symbol is dynamic, we'll need all the relocations in their
- natural form. If this is a shared object, and it has been forced
- local, we'll need the same number of RELATIVE relocations. */
- dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
- /* If the symbol is a hidden undefined weak, then we never have any
- relocations. Avoid the loop which may want to add RELATIVE relocs
- based on bfd_link_pic (info). */
- if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
- return true;
- for (relent = h->reloc_entries; relent; relent = relent->next)
- {
- entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic,
- bfd_link_pic (info),
- bfd_link_pie (info));
- if (entries)
- {
- asection *sec = relent->sec;
- relent->srel->size +=
- entries * sizeof (Elf64_External_Rela) * relent->count;
- if ((sec->flags & SEC_READONLY) != 0)
- {
- info->flags |= DT_TEXTREL;
- info->callbacks->minfo
- (_("%pB: dynamic relocation against `%pT' in "
- "read-only section `%pA'\n"),
- sec->owner, h->root.root.root.string, sec);
- }
- }
- }
- return true;
- }
- /* Subroutine of elf64_alpha_size_rela_got_section for doing the
- global symbols. */
- static bool
- elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry *h,
- struct bfd_link_info *info)
- {
- bool dynamic;
- struct alpha_elf_got_entry *gotent;
- unsigned long entries;
- /* If we're using a plt for this symbol, then all of its relocations
- for its got entries go into .rela.plt. */
- if (h->root.needs_plt)
- return true;
- /* If the symbol is dynamic, we'll need all the relocations in their
- natural form. If this is a shared object, and it has been forced
- local, we'll need the same number of RELATIVE relocations. */
- dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
- /* If the symbol is a hidden undefined weak, then we never have any
- relocations. Avoid the loop which may want to add RELATIVE relocs
- based on bfd_link_pic (info). */
- if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
- return true;
- entries = 0;
- for (gotent = h->got_entries; gotent ; gotent = gotent->next)
- if (gotent->use_count > 0)
- entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type, dynamic,
- bfd_link_pic (info),
- bfd_link_pie (info));
- if (entries > 0)
- {
- asection *srel = elf_hash_table(info)->srelgot;
- BFD_ASSERT (srel != NULL);
- srel->size += sizeof (Elf64_External_Rela) * entries;
- }
- return true;
- }
- /* Set the sizes of the dynamic relocation sections. */
- static void
- elf64_alpha_size_rela_got_section (struct bfd_link_info *info)
- {
- unsigned long entries;
- bfd *i;
- asection *srel;
- struct alpha_elf_link_hash_table * htab;
- htab = alpha_elf_hash_table (info);
- if (htab == NULL)
- return;
- /* Shared libraries often require RELATIVE relocs, and some relocs
- require attention for the main application as well. */
- entries = 0;
- for (i = htab->got_list;
- i ; i = alpha_elf_tdata(i)->got_link_next)
- {
- bfd *j;
- for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
- {
- struct alpha_elf_got_entry **local_got_entries, *gotent;
- int k, n;
- local_got_entries = alpha_elf_tdata(j)->local_got_entries;
- if (!local_got_entries)
- continue;
- for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
- for (gotent = local_got_entries[k];
- gotent ; gotent = gotent->next)
- if (gotent->use_count > 0)
- entries += (alpha_dynamic_entries_for_reloc
- (gotent->reloc_type, 0, bfd_link_pic (info),
- bfd_link_pie (info)));
- }
- }
- srel = elf_hash_table(info)->srelgot;
- if (!srel)
- {
- BFD_ASSERT (entries == 0);
- return;
- }
- srel->size = sizeof (Elf64_External_Rela) * entries;
- /* Now do the non-local symbols. */
- alpha_elf_link_hash_traverse (htab,
- elf64_alpha_size_rela_got_1, info);
- }
- /* Set the sizes of the dynamic sections. */
- static bool
- elf64_alpha_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
- struct bfd_link_info *info)
- {
- bfd *dynobj;
- asection *s;
- bool relplt, relocs;
- struct alpha_elf_link_hash_table * htab;
- htab = alpha_elf_hash_table (info);
- if (htab == NULL)
- return false;
- dynobj = elf_hash_table(info)->dynobj;
- BFD_ASSERT(dynobj != NULL);
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- /* Set the contents of the .interp section to the interpreter. */
- if (bfd_link_executable (info) && !info->nointerp)
- {
- s = bfd_get_linker_section (dynobj, ".interp");
- BFD_ASSERT (s != NULL);
- s->size = sizeof ELF_DYNAMIC_INTERPRETER;
- s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
- }
- /* Now that we've seen all of the input files, we can decide which
- symbols need dynamic relocation entries and which don't. We've
- collected information in check_relocs that we can now apply to
- size the dynamic relocation sections. */
- alpha_elf_link_hash_traverse (htab,
- elf64_alpha_calc_dynrel_sizes, info);
- elf64_alpha_size_rela_got_section (info);
- elf64_alpha_size_plt_section (info);
- }
- /* else we're not dynamic and by definition we don't need such things. */
- /* The check_relocs and adjust_dynamic_symbol entry points have
- determined the sizes of the various dynamic sections. Allocate
- memory for them. */
- relplt = false;
- relocs = false;
- for (s = dynobj->sections; s != NULL; s = s->next)
- {
- const char *name;
- if (!(s->flags & SEC_LINKER_CREATED))
- continue;
- /* It's OK to base decisions on the section name, because none
- of the dynobj section names depend upon the input files. */
- name = bfd_section_name (s);
- if (startswith (name, ".rela"))
- {
- if (s->size != 0)
- {
- if (strcmp (name, ".rela.plt") == 0)
- relplt = true;
- else
- relocs = true;
- /* We use the reloc_count field as a counter if we need
- to copy relocs into the output file. */
- s->reloc_count = 0;
- }
- }
- else if (! startswith (name, ".got")
- && strcmp (name, ".plt") != 0
- && strcmp (name, ".dynbss") != 0)
- {
- /* It's not one of our dynamic sections, so don't allocate space. */
- continue;
- }
- if (s->size == 0)
- {
- /* If we don't need this section, strip it from the output file.
- This is to handle .rela.bss and .rela.plt. We must create it
- in create_dynamic_sections, because it must be created before
- the linker maps input sections to output sections. The
- linker does that before adjust_dynamic_symbol is called, and
- it is that function which decides whether anything needs to
- go into these sections. */
- if (!startswith (name, ".got"))
- s->flags |= SEC_EXCLUDE;
- }
- else if ((s->flags & SEC_HAS_CONTENTS) != 0)
- {
- /* Allocate memory for the section contents. */
- s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
- if (s->contents == NULL)
- return false;
- }
- }
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- /* Add some entries to the .dynamic section. We fill in the
- values later, in elf64_alpha_finish_dynamic_sections, but we
- must add the entries now so that we get the correct size for
- the .dynamic section. The DT_DEBUG entry is filled in by the
- dynamic linker and used by the debugger. */
- #define add_dynamic_entry(TAG, VAL) \
- _bfd_elf_add_dynamic_entry (info, TAG, VAL)
- if (!_bfd_elf_add_dynamic_tags (output_bfd, info,
- relocs || relplt))
- return false;
- if (relplt
- && elf64_alpha_use_secureplt
- && !add_dynamic_entry (DT_ALPHA_PLTRO, 1))
- return false;
- }
- #undef add_dynamic_entry
- return true;
- }
- /* These functions do relaxation for Alpha ELF.
- Currently I'm only handling what I can do with existing compiler
- and assembler support, which means no instructions are removed,
- though some may be nopped. At this time GCC does not emit enough
- information to do all of the relaxing that is possible. It will
- take some not small amount of work for that to happen.
- There are a couple of interesting papers that I once read on this
- subject, that I cannot find references to at the moment, that
- related to Alpha in particular. They are by David Wall, then of
- DEC WRL. */
- struct alpha_relax_info
- {
- bfd *abfd;
- asection *sec;
- bfd_byte *contents;
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Rela *relocs, *relend;
- struct bfd_link_info *link_info;
- bfd_vma gp;
- bfd *gotobj;
- asection *tsec;
- struct alpha_elf_link_hash_entry *h;
- struct alpha_elf_got_entry **first_gotent;
- struct alpha_elf_got_entry *gotent;
- bool changed_contents;
- bool changed_relocs;
- unsigned char other;
- };
- static Elf_Internal_Rela *
- elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela *rel,
- Elf_Internal_Rela *relend,
- bfd_vma offset, int type)
- {
- while (rel < relend)
- {
- if (rel->r_offset == offset
- && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
- return rel;
- ++rel;
- }
- return NULL;
- }
- static bool
- elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval,
- Elf_Internal_Rela *irel, unsigned long r_type)
- {
- unsigned int insn;
- bfd_signed_vma disp;
- /* Get the instruction. */
- insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
- if (insn >> 26 != OP_LDQ)
- {
- reloc_howto_type *howto = elf64_alpha_howto_table + r_type;
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: %pA+%#" PRIx64 ": warning: "
- "%s relocation against unexpected insn"),
- info->abfd, info->sec, (uint64_t) irel->r_offset, howto->name);
- return true;
- }
- /* Can't relax dynamic symbols. */
- if (info->h != NULL
- && alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
- return true;
- /* Can't use local-exec relocations in shared libraries. */
- if (r_type == R_ALPHA_GOTTPREL
- && bfd_link_dll (info->link_info))
- return true;
- if (r_type == R_ALPHA_LITERAL)
- {
- /* Look for nice constant addresses. This includes the not-uncommon
- special case of 0 for undefweak symbols. */
- if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak)
- || (!bfd_link_pic (info->link_info)
- && (symval >= (bfd_vma)-0x8000 || symval < 0x8000)))
- {
- disp = 0;
- insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
- insn |= (symval & 0xffff);
- r_type = R_ALPHA_NONE;
- }
- else
- {
- /* We may only create GPREL relocs during the second pass. */
- if (info->link_info->relax_pass == 0)
- return true;
- disp = symval - info->gp;
- insn = (OP_LDA << 26) | (insn & 0x03ff0000);
- r_type = R_ALPHA_GPREL16;
- }
- }
- else
- {
- bfd_vma dtp_base, tp_base;
- BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
- dtp_base = alpha_get_dtprel_base (info->link_info);
- tp_base = alpha_get_tprel_base (info->link_info);
- disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
- insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
- switch (r_type)
- {
- case R_ALPHA_GOTDTPREL:
- r_type = R_ALPHA_DTPREL16;
- break;
- case R_ALPHA_GOTTPREL:
- r_type = R_ALPHA_TPREL16;
- break;
- default:
- BFD_ASSERT (0);
- return false;
- }
- }
- if (disp < -0x8000 || disp >= 0x8000)
- return true;
- bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
- info->changed_contents = true;
- /* Reduce the use count on this got entry by one, possibly
- eliminating it. */
- if (--info->gotent->use_count == 0)
- {
- int sz = alpha_got_entry_size (r_type);
- alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
- if (!info->h)
- alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
- }
- /* Smash the existing GOT relocation for its 16-bit immediate pair. */
- irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type);
- info->changed_relocs = true;
- /* ??? Search forward through this basic block looking for insns
- that use the target register. Stop after an insn modifying the
- register is seen, or after a branch or call.
- Any such memory load insn may be substituted by a load directly
- off the GP. This allows the memory load insn to be issued before
- the calculated GP register would otherwise be ready.
- Any such jsr insn can be replaced by a bsr if it is in range.
- This would mean that we'd have to _add_ relocations, the pain of
- which gives one pause. */
- return true;
- }
- static bfd_vma
- elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval)
- {
- /* If the function has the same gp, and we can identify that the
- function does not use its function pointer, we can eliminate the
- address load. */
- /* If the symbol is marked NOPV, we are being told the function never
- needs its procedure value. */
- if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV)
- return symval;
- /* If the symbol is marked STD_GP, we are being told the function does
- a normal ldgp in the first two words. */
- else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD)
- ;
- /* Otherwise, we may be able to identify a GP load in the first two
- words, which we can then skip. */
- else
- {
- Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
- bfd_vma ofs;
- /* Load the relocations from the section that the target symbol is in. */
- if (info->sec == info->tsec)
- {
- tsec_relocs = info->relocs;
- tsec_relend = info->relend;
- tsec_free = NULL;
- }
- else
- {
- tsec_relocs = (_bfd_elf_link_read_relocs
- (info->abfd, info->tsec, NULL,
- (Elf_Internal_Rela *) NULL,
- info->link_info->keep_memory));
- if (tsec_relocs == NULL)
- return 0;
- tsec_relend = tsec_relocs + info->tsec->reloc_count;
- tsec_free = (elf_section_data (info->tsec)->relocs == tsec_relocs
- ? NULL
- : tsec_relocs);
- }
- /* Recover the symbol's offset within the section. */
- ofs = (symval - info->tsec->output_section->vma
- - info->tsec->output_offset);
- /* Look for a GPDISP reloc. */
- gpdisp = (elf64_alpha_find_reloc_at_ofs
- (tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
- if (!gpdisp || gpdisp->r_addend != 4)
- {
- free (tsec_free);
- return 0;
- }
- free (tsec_free);
- }
- /* We've now determined that we can skip an initial gp load. Verify
- that the call and the target use the same gp. */
- if (info->link_info->output_bfd->xvec != info->tsec->owner->xvec
- || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj)
- return 0;
- return symval + 8;
- }
- static bool
- elf64_alpha_relax_with_lituse (struct alpha_relax_info *info,
- bfd_vma symval, Elf_Internal_Rela *irel)
- {
- Elf_Internal_Rela *urel, *erel, *irelend = info->relend;
- int flags;
- bfd_signed_vma disp;
- bool fits16;
- bool fits32;
- bool lit_reused = false;
- bool all_optimized = true;
- bool changed_contents;
- bool changed_relocs;
- bfd_byte *contents = info->contents;
- bfd *abfd = info->abfd;
- bfd_vma sec_output_vma;
- unsigned int lit_insn;
- int relax_pass;
- lit_insn = bfd_get_32 (abfd, contents + irel->r_offset);
- if (lit_insn >> 26 != OP_LDQ)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: %pA+%#" PRIx64 ": warning: "
- "%s relocation against unexpected insn"),
- abfd, info->sec, (uint64_t) irel->r_offset, "LITERAL");
- return true;
- }
- /* Can't relax dynamic symbols. */
- if (info->h != NULL
- && alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
- return true;
- changed_contents = info->changed_contents;
- changed_relocs = info->changed_relocs;
- sec_output_vma = info->sec->output_section->vma + info->sec->output_offset;
- relax_pass = info->link_info->relax_pass;
- /* Summarize how this particular LITERAL is used. */
- for (erel = irel+1, flags = 0; erel < irelend; ++erel)
- {
- if (ELF64_R_TYPE (erel->r_info) != R_ALPHA_LITUSE)
- break;
- if (erel->r_addend <= 6)
- flags |= 1 << erel->r_addend;
- }
- /* A little preparation for the loop... */
- disp = symval - info->gp;
- for (urel = irel+1; urel < erel; ++urel)
- {
- bfd_vma urel_r_offset = urel->r_offset;
- unsigned int insn;
- int insn_disp;
- bfd_signed_vma xdisp;
- Elf_Internal_Rela nrel;
- insn = bfd_get_32 (abfd, contents + urel_r_offset);
- switch (urel->r_addend)
- {
- case LITUSE_ALPHA_ADDR:
- default:
- /* This type is really just a placeholder to note that all
- uses cannot be optimized, but to still allow some. */
- all_optimized = false;
- break;
- case LITUSE_ALPHA_BASE:
- /* We may only create GPREL relocs during the second pass. */
- if (relax_pass == 0)
- {
- all_optimized = false;
- break;
- }
- /* We can always optimize 16-bit displacements. */
- /* Extract the displacement from the instruction, sign-extending
- it if necessary, then test whether it is within 16 or 32 bits
- displacement from GP. */
- insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000;
- xdisp = disp + insn_disp;
- fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000);
- fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000
- && xdisp < 0x7fff8000);
- if (fits16)
- {
- /* Take the op code and dest from this insn, take the base
- register from the literal insn. Leave the offset alone. */
- insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
- bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
- changed_contents = true;
- nrel = *urel;
- nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPREL16);
- nrel.r_addend = irel->r_addend;
- /* As we adjust, move the reloc to the end so that we don't
- break the LITERAL+LITUSE chain. */
- if (urel < --erel)
- *urel-- = *erel;
- *erel = nrel;
- changed_relocs = true;
- }
- /* If all mem+byte, we can optimize 32-bit mem displacements. */
- else if (fits32 && !(flags & ~6))
- {
- /* FIXME: sanity check that lit insn Ra is mem insn Rb. */
- irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPRELHIGH);
- lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
- bfd_put_32 (abfd, (bfd_vma) lit_insn, contents + irel->r_offset);
- lit_reused = true;
- changed_contents = true;
- /* Since all relocs must be optimized, don't bother swapping
- this relocation to the end. */
- urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_GPRELLOW);
- urel->r_addend = irel->r_addend;
- changed_relocs = true;
- }
- else
- all_optimized = false;
- break;
- case LITUSE_ALPHA_BYTOFF:
- /* We can always optimize byte instructions. */
- /* FIXME: sanity check the insn for byte op. Check that the
- literal dest reg is indeed Rb in the byte insn. */
- insn &= ~ (unsigned) 0x001ff000;
- insn |= ((symval & 7) << 13) | 0x1000;
- bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
- changed_contents = true;
- nrel = *urel;
- nrel.r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- nrel.r_addend = 0;
- /* As we adjust, move the reloc to the end so that we don't
- break the LITERAL+LITUSE chain. */
- if (urel < --erel)
- *urel-- = *erel;
- *erel = nrel;
- changed_relocs = true;
- break;
- case LITUSE_ALPHA_JSR:
- case LITUSE_ALPHA_TLSGD:
- case LITUSE_ALPHA_TLSLDM:
- case LITUSE_ALPHA_JSRDIRECT:
- {
- bfd_vma optdest, org;
- bfd_signed_vma odisp;
- /* For undefined weak symbols, we're mostly interested in getting
- rid of the got entry whenever possible, so optimize this to a
- use of the zero register. */
- if (info->h && info->h->root.root.type == bfd_link_hash_undefweak)
- {
- insn |= 31 << 16;
- bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
- changed_contents = true;
- break;
- }
- /* If not zero, place to jump without needing pv. */
- optdest = elf64_alpha_relax_opt_call (info, symval);
- org = sec_output_vma + urel_r_offset + 4;
- odisp = (optdest ? optdest : symval) - org;
- if (odisp >= -0x400000 && odisp < 0x400000)
- {
- Elf_Internal_Rela *xrel;
- /* Preserve branch prediction call stack when possible. */
- if ((insn & INSN_JSR_MASK) == INSN_JSR)
- insn = (OP_BSR << 26) | (insn & 0x03e00000);
- else
- insn = (OP_BR << 26) | (insn & 0x03e00000);
- bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
- changed_contents = true;
- nrel = *urel;
- nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
- R_ALPHA_BRADDR);
- nrel.r_addend = irel->r_addend;
- if (optdest)
- nrel.r_addend += optdest - symval;
- else
- all_optimized = false;
- /* Kill any HINT reloc that might exist for this insn. */
- xrel = (elf64_alpha_find_reloc_at_ofs
- (info->relocs, info->relend, urel_r_offset,
- R_ALPHA_HINT));
- if (xrel)
- xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- /* As we adjust, move the reloc to the end so that we don't
- break the LITERAL+LITUSE chain. */
- if (urel < --erel)
- *urel-- = *erel;
- *erel = nrel;
- info->changed_relocs = true;
- }
- else
- all_optimized = false;
- /* Even if the target is not in range for a direct branch,
- if we share a GP, we can eliminate the gp reload. */
- if (optdest)
- {
- Elf_Internal_Rela *gpdisp
- = (elf64_alpha_find_reloc_at_ofs
- (info->relocs, irelend, urel_r_offset + 4,
- R_ALPHA_GPDISP));
- if (gpdisp)
- {
- bfd_byte *p_ldah = contents + gpdisp->r_offset;
- bfd_byte *p_lda = p_ldah + gpdisp->r_addend;
- unsigned int ldah = bfd_get_32 (abfd, p_ldah);
- unsigned int lda = bfd_get_32 (abfd, p_lda);
- /* Verify that the instruction is "ldah $29,0($26)".
- Consider a function that ends in a noreturn call,
- and that the next function begins with an ldgp,
- and that by accident there is no padding between.
- In that case the insn would use $27 as the base. */
- if (ldah == 0x27ba0000 && lda == 0x23bd0000)
- {
- bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, p_ldah);
- bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, p_lda);
- gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- changed_contents = true;
- changed_relocs = true;
- }
- }
- }
- }
- break;
- }
- }
- /* If we reused the literal instruction, we must have optimized all. */
- BFD_ASSERT(!lit_reused || all_optimized);
- /* If all cases were optimized, we can reduce the use count on this
- got entry by one, possibly eliminating it. */
- if (all_optimized)
- {
- if (--info->gotent->use_count == 0)
- {
- int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
- alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
- if (!info->h)
- alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
- }
- /* If the literal instruction is no longer needed (it may have been
- reused. We can eliminate it. */
- /* ??? For now, I don't want to deal with compacting the section,
- so just nop it out. */
- if (!lit_reused)
- {
- irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- changed_relocs = true;
- bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, contents + irel->r_offset);
- changed_contents = true;
- }
- }
- info->changed_contents = changed_contents;
- info->changed_relocs = changed_relocs;
- if (all_optimized || relax_pass == 0)
- return true;
- return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL);
- }
- static bool
- elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval,
- Elf_Internal_Rela *irel, bool is_gd)
- {
- bfd_byte *pos[5];
- unsigned int insn, tlsgd_reg;
- Elf_Internal_Rela *gpdisp, *hint;
- bool dynamic, use_gottprel;
- unsigned long new_symndx;
- dynamic = (info->h != NULL
- && alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info));
- /* If a TLS symbol is accessed using IE at least once, there is no point
- to use dynamic model for it. */
- if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE))
- ;
- /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
- then we might as well relax to IE. */
- else if (bfd_link_pic (info->link_info) && !dynamic
- && (info->link_info->flags & DF_STATIC_TLS))
- ;
- /* Otherwise we must be building an executable to do anything. */
- else if (bfd_link_pic (info->link_info))
- return true;
- /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
- the matching LITUSE_TLS relocations. */
- if (irel + 2 >= info->relend)
- return true;
- if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL
- || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE
- || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM))
- return true;
- /* There must be a GPDISP relocation positioned immediately after the
- LITUSE relocation. */
- gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
- irel[2].r_offset + 4, R_ALPHA_GPDISP);
- if (!gpdisp)
- return true;
- pos[0] = info->contents + irel[0].r_offset;
- pos[1] = info->contents + irel[1].r_offset;
- pos[2] = info->contents + irel[2].r_offset;
- pos[3] = info->contents + gpdisp->r_offset;
- pos[4] = pos[3] + gpdisp->r_addend;
- /* Beware of the compiler hoisting part of the sequence out a loop
- and adjusting the destination register for the TLSGD insn. If this
- happens, there will be a move into $16 before the JSR insn, so only
- transformations of the first insn pair should use this register. */
- tlsgd_reg = bfd_get_32 (info->abfd, pos[0]);
- tlsgd_reg = (tlsgd_reg >> 21) & 31;
- /* Generally, the positions are not allowed to be out of order, lest the
- modified insn sequence have different register lifetimes. We can make
- an exception when pos 1 is adjacent to pos 0. */
- if (pos[1] + 4 == pos[0])
- {
- bfd_byte *tmp = pos[0];
- pos[0] = pos[1];
- pos[1] = tmp;
- }
- if (pos[1] >= pos[2] || pos[2] >= pos[3])
- return true;
- /* Reduce the use count on the LITERAL relocation. Do this before we
- smash the symndx when we adjust the relocations below. */
- {
- struct alpha_elf_got_entry *lit_gotent;
- struct alpha_elf_link_hash_entry *lit_h;
- unsigned long indx;
- BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info);
- indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info;
- lit_h = alpha_elf_sym_hashes (info->abfd)[indx];
- while (lit_h->root.root.type == bfd_link_hash_indirect
- || lit_h->root.root.type == bfd_link_hash_warning)
- lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link;
- for (lit_gotent = lit_h->got_entries; lit_gotent ;
- lit_gotent = lit_gotent->next)
- if (lit_gotent->gotobj == info->gotobj
- && lit_gotent->reloc_type == R_ALPHA_LITERAL
- && lit_gotent->addend == irel[1].r_addend)
- break;
- BFD_ASSERT (lit_gotent);
- if (--lit_gotent->use_count == 0)
- {
- int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
- alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
- }
- }
- /* Change
- lda $16,x($gp) !tlsgd!1
- ldq $27,__tls_get_addr($gp) !literal!1
- jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
- ldah $29,0($26) !gpdisp!2
- lda $29,0($29) !gpdisp!2
- to
- ldq $16,x($gp) !gottprel
- unop
- call_pal rduniq
- addq $16,$0,$0
- unop
- or the first pair to
- lda $16,x($gp) !tprel
- unop
- or
- ldah $16,x($gp) !tprelhi
- lda $16,x($16) !tprello
- as appropriate. */
- use_gottprel = false;
- new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : STN_UNDEF;
- /* Some compilers warn about a Boolean-looking expression being
- used in a switch. The explicit cast silences them. */
- switch ((int) (!dynamic && !bfd_link_pic (info->link_info)))
- {
- case 1:
- {
- bfd_vma tp_base;
- bfd_signed_vma disp;
- BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
- tp_base = alpha_get_tprel_base (info->link_info);
- disp = symval - tp_base;
- if (disp >= -0x8000 && disp < 0x8000)
- {
- insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (31 << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
- irel[0].r_offset = pos[0] - info->contents;
- irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16);
- irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- break;
- }
- else if (disp >= -(bfd_signed_vma) 0x80000000
- && disp < (bfd_signed_vma) 0x7fff8000
- && pos[0] + 4 == pos[1])
- {
- insn = (OP_LDAH << 26) | (tlsgd_reg << 21) | (31 << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
- insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (tlsgd_reg << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]);
- irel[0].r_offset = pos[0] - info->contents;
- irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI);
- irel[1].r_offset = pos[1] - info->contents;
- irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO);
- break;
- }
- }
- /* FALLTHRU */
- default:
- use_gottprel = true;
- insn = (OP_LDQ << 26) | (tlsgd_reg << 21) | (29 << 16);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
- irel[0].r_offset = pos[0] - info->contents;
- irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL);
- irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- break;
- }
- bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]);
- insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0);
- bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]);
- bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]);
- irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
- irel[2].r_offset, R_ALPHA_HINT);
- if (hint)
- hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
- info->changed_contents = true;
- info->changed_relocs = true;
- /* Reduce the use count on the TLSGD/TLSLDM relocation. */
- if (--info->gotent->use_count == 0)
- {
- int sz = alpha_got_entry_size (info->gotent->reloc_type);
- alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
- if (!info->h)
- alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
- }
- /* If we've switched to a GOTTPREL relocation, increment the reference
- count on that got entry. */
- if (use_gottprel)
- {
- struct alpha_elf_got_entry *tprel_gotent;
- for (tprel_gotent = *info->first_gotent; tprel_gotent ;
- tprel_gotent = tprel_gotent->next)
- if (tprel_gotent->gotobj == info->gotobj
- && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL
- && tprel_gotent->addend == irel->r_addend)
- break;
- if (tprel_gotent)
- tprel_gotent->use_count++;
- else
- {
- if (info->gotent->use_count == 0)
- tprel_gotent = info->gotent;
- else
- {
- tprel_gotent = (struct alpha_elf_got_entry *)
- bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry));
- if (!tprel_gotent)
- return false;
- tprel_gotent->next = *info->first_gotent;
- *info->first_gotent = tprel_gotent;
- tprel_gotent->gotobj = info->gotobj;
- tprel_gotent->addend = irel->r_addend;
- tprel_gotent->got_offset = -1;
- tprel_gotent->reloc_done = 0;
- tprel_gotent->reloc_xlated = 0;
- }
- tprel_gotent->use_count = 1;
- tprel_gotent->reloc_type = R_ALPHA_GOTTPREL;
- }
- }
- return true;
- }
- static bool
- elf64_alpha_relax_section (bfd *abfd, asection *sec,
- struct bfd_link_info *link_info, bool *again)
- {
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Rela *internal_relocs;
- Elf_Internal_Rela *irel, *irelend;
- Elf_Internal_Sym *isymbuf = NULL;
- struct alpha_elf_got_entry **local_got_entries;
- struct alpha_relax_info info;
- struct alpha_elf_link_hash_table * htab;
- int relax_pass;
- htab = alpha_elf_hash_table (link_info);
- if (htab == NULL)
- return false;
- /* There's nothing to change, yet. */
- *again = false;
- if (bfd_link_relocatable (link_info)
- || ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC))
- != (SEC_CODE | SEC_RELOC | SEC_ALLOC))
- || sec->reloc_count == 0)
- return true;
- BFD_ASSERT (is_alpha_elf (abfd));
- relax_pass = link_info->relax_pass;
- /* Make sure our GOT and PLT tables are up-to-date. */
- if (htab->relax_trip != link_info->relax_trip)
- {
- htab->relax_trip = link_info->relax_trip;
- /* This should never fail after the initial round, since the only error
- is GOT overflow, and relaxation only shrinks the table. However, we
- may only merge got sections during the first pass. If we merge
- sections after we've created GPREL relocs, the GP for the merged
- section backs up which may put the relocs out of range. */
- if (!elf64_alpha_size_got_sections (link_info, relax_pass == 0))
- abort ();
- if (elf_hash_table (link_info)->dynamic_sections_created)
- {
- elf64_alpha_size_plt_section (link_info);
- elf64_alpha_size_rela_got_section (link_info);
- }
- }
- symtab_hdr = &elf_symtab_hdr (abfd);
- local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
- /* Load the relocations for this section. */
- internal_relocs = (_bfd_elf_link_read_relocs
- (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
- link_info->keep_memory));
- if (internal_relocs == NULL)
- return false;
- memset(&info, 0, sizeof (info));
- info.abfd = abfd;
- info.sec = sec;
- info.link_info = link_info;
- info.symtab_hdr = symtab_hdr;
- info.relocs = internal_relocs;
- info.relend = irelend = internal_relocs + sec->reloc_count;
- /* Find the GP for this object. Do not store the result back via
- _bfd_set_gp_value, since this could change again before final. */
- info.gotobj = alpha_elf_tdata (abfd)->gotobj;
- if (info.gotobj)
- {
- asection *sgot = alpha_elf_tdata (info.gotobj)->got;
- info.gp = (sgot->output_section->vma
- + sgot->output_offset
- + 0x8000);
- }
- /* Get the section contents. */
- if (elf_section_data (sec)->this_hdr.contents != NULL)
- info.contents = elf_section_data (sec)->this_hdr.contents;
- else
- {
- if (!bfd_malloc_and_get_section (abfd, sec, &info.contents))
- goto error_return;
- }
- for (irel = internal_relocs; irel < irelend; irel++)
- {
- bfd_vma symval;
- struct alpha_elf_got_entry *gotent;
- unsigned long r_type = ELF64_R_TYPE (irel->r_info);
- unsigned long r_symndx = ELF64_R_SYM (irel->r_info);
- /* Early exit for unhandled or unrelaxable relocations. */
- if (r_type != R_ALPHA_LITERAL)
- {
- /* We complete everything except LITERAL in the first pass. */
- if (relax_pass != 0)
- continue;
- if (r_type == R_ALPHA_TLSLDM)
- {
- /* The symbol for a TLSLDM reloc is ignored. Collapse the
- reloc to the STN_UNDEF (0) symbol so that they all match. */
- r_symndx = STN_UNDEF;
- }
- else if (r_type != R_ALPHA_GOTDTPREL
- && r_type != R_ALPHA_GOTTPREL
- && r_type != R_ALPHA_TLSGD)
- continue;
- }
- /* Get the value of the symbol referred to by the reloc. */
- if (r_symndx < symtab_hdr->sh_info)
- {
- /* A local symbol. */
- Elf_Internal_Sym *isym;
- /* Read this BFD's local symbols. */
- if (isymbuf == NULL)
- {
- isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
- if (isymbuf == NULL)
- isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
- symtab_hdr->sh_info, 0,
- NULL, NULL, NULL);
- if (isymbuf == NULL)
- goto error_return;
- }
- isym = isymbuf + r_symndx;
- /* Given the symbol for a TLSLDM reloc is ignored, this also
- means forcing the symbol value to the tp base. */
- if (r_type == R_ALPHA_TLSLDM)
- {
- info.tsec = bfd_abs_section_ptr;
- symval = alpha_get_tprel_base (info.link_info);
- }
- else
- {
- symval = isym->st_value;
- if (isym->st_shndx == SHN_UNDEF)
- continue;
- else if (isym->st_shndx == SHN_ABS)
- info.tsec = bfd_abs_section_ptr;
- else if (isym->st_shndx == SHN_COMMON)
- info.tsec = bfd_com_section_ptr;
- else
- info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
- }
- info.h = NULL;
- info.other = isym->st_other;
- if (local_got_entries)
- info.first_gotent = &local_got_entries[r_symndx];
- else
- {
- info.first_gotent = &info.gotent;
- info.gotent = NULL;
- }
- }
- else
- {
- unsigned long indx;
- struct alpha_elf_link_hash_entry *h;
- indx = r_symndx - symtab_hdr->sh_info;
- h = alpha_elf_sym_hashes (abfd)[indx];
- BFD_ASSERT (h != NULL);
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
- /* If the symbol is undefined, we can't do anything with it. */
- if (h->root.root.type == bfd_link_hash_undefined)
- continue;
- /* If the symbol isn't defined in the current module,
- again we can't do anything. */
- if (h->root.root.type == bfd_link_hash_undefweak)
- {
- info.tsec = bfd_abs_section_ptr;
- symval = 0;
- }
- else if (!h->root.def_regular)
- {
- /* Except for TLSGD relocs, which can sometimes be
- relaxed to GOTTPREL relocs. */
- if (r_type != R_ALPHA_TLSGD)
- continue;
- info.tsec = bfd_abs_section_ptr;
- symval = 0;
- }
- else
- {
- info.tsec = h->root.root.u.def.section;
- symval = h->root.root.u.def.value;
- }
- info.h = h;
- info.other = h->root.other;
- info.first_gotent = &h->got_entries;
- }
- /* Search for the got entry to be used by this relocation. */
- for (gotent = *info.first_gotent; gotent ; gotent = gotent->next)
- if (gotent->gotobj == info.gotobj
- && gotent->reloc_type == r_type
- && gotent->addend == irel->r_addend)
- break;
- info.gotent = gotent;
- symval += info.tsec->output_section->vma + info.tsec->output_offset;
- symval += irel->r_addend;
- switch (r_type)
- {
- case R_ALPHA_LITERAL:
- BFD_ASSERT(info.gotent != NULL);
- /* If there exist LITUSE relocations immediately following, this
- opens up all sorts of interesting optimizations, because we
- now know every location that this address load is used. */
- if (irel+1 < irelend
- && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
- {
- if (!elf64_alpha_relax_with_lituse (&info, symval, irel))
- goto error_return;
- }
- else
- {
- if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
- goto error_return;
- }
- break;
- case R_ALPHA_GOTDTPREL:
- case R_ALPHA_GOTTPREL:
- BFD_ASSERT(info.gotent != NULL);
- if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
- goto error_return;
- break;
- case R_ALPHA_TLSGD:
- case R_ALPHA_TLSLDM:
- BFD_ASSERT(info.gotent != NULL);
- if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel,
- r_type == R_ALPHA_TLSGD))
- goto error_return;
- break;
- }
- }
- if (isymbuf != NULL
- && symtab_hdr->contents != (unsigned char *) isymbuf)
- {
- if (!link_info->keep_memory)
- free (isymbuf);
- else
- {
- /* Cache the symbols for elf_link_input_bfd. */
- symtab_hdr->contents = (unsigned char *) isymbuf;
- }
- }
- if (info.contents != NULL
- && elf_section_data (sec)->this_hdr.contents != info.contents)
- {
- if (!info.changed_contents && !link_info->keep_memory)
- free (info.contents);
- else
- {
- /* Cache the section contents for elf_link_input_bfd. */
- elf_section_data (sec)->this_hdr.contents = info.contents;
- }
- }
- if (elf_section_data (sec)->relocs != internal_relocs)
- {
- if (!info.changed_relocs)
- free (internal_relocs);
- else
- elf_section_data (sec)->relocs = internal_relocs;
- }
- *again = info.changed_contents || info.changed_relocs;
- return true;
- error_return:
- if (symtab_hdr->contents != (unsigned char *) isymbuf)
- free (isymbuf);
- if (elf_section_data (sec)->this_hdr.contents != info.contents)
- free (info.contents);
- if (elf_section_data (sec)->relocs != internal_relocs)
- free (internal_relocs);
- return false;
- }
- /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
- into the next available slot in SREL. */
- static void
- elf64_alpha_emit_dynrel (bfd *abfd, struct bfd_link_info *info,
- asection *sec, asection *srel, bfd_vma offset,
- long dynindx, long rtype, bfd_vma addend)
- {
- Elf_Internal_Rela outrel;
- bfd_byte *loc;
- BFD_ASSERT (srel != NULL);
- outrel.r_info = ELF64_R_INFO (dynindx, rtype);
- outrel.r_addend = addend;
- offset = _bfd_elf_section_offset (abfd, info, sec, offset);
- if ((offset | 1) != (bfd_vma) -1)
- outrel.r_offset = sec->output_section->vma + sec->output_offset + offset;
- else
- memset (&outrel, 0, sizeof (outrel));
- loc = srel->contents;
- loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (abfd, &outrel, loc);
- BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count <= srel->size);
- }
- /* Relocate an Alpha ELF section for a relocatable link.
- We don't have to change anything unless the reloc is against a section
- symbol, in which case we have to adjust according to where the section
- symbol winds up in the output section. */
- static int
- elf64_alpha_relocate_section_r (bfd *output_bfd ATTRIBUTE_UNUSED,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- bfd *input_bfd, asection *input_section,
- bfd_byte *contents ATTRIBUTE_UNUSED,
- Elf_Internal_Rela *relocs,
- Elf_Internal_Sym *local_syms,
- asection **local_sections)
- {
- unsigned long symtab_hdr_sh_info;
- Elf_Internal_Rela *rel;
- Elf_Internal_Rela *relend;
- struct elf_link_hash_entry **sym_hashes;
- bool ret_val = true;
- symtab_hdr_sh_info = elf_symtab_hdr (input_bfd).sh_info;
- sym_hashes = elf_sym_hashes (input_bfd);
- relend = relocs + input_section->reloc_count;
- for (rel = relocs; rel < relend; rel++)
- {
- unsigned long r_symndx;
- Elf_Internal_Sym *sym;
- asection *sec;
- unsigned long r_type;
- r_type = ELF64_R_TYPE (rel->r_info);
- if (r_type >= R_ALPHA_max)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: unsupported relocation type %#x"),
- input_bfd, (int) r_type);
- bfd_set_error (bfd_error_bad_value);
- ret_val = false;
- continue;
- }
- /* The symbol associated with GPDISP and LITUSE is
- immaterial. Only the addend is significant. */
- if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE)
- continue;
- r_symndx = ELF64_R_SYM (rel->r_info);
- if (r_symndx < symtab_hdr_sh_info)
- {
- sym = local_syms + r_symndx;
- sec = local_sections[r_symndx];
- }
- else
- {
- struct elf_link_hash_entry *h;
- h = sym_hashes[r_symndx - symtab_hdr_sh_info];
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- if (h->root.type != bfd_link_hash_defined
- && h->root.type != bfd_link_hash_defweak)
- continue;
- sym = NULL;
- sec = h->root.u.def.section;
- }
- if (sec != NULL && discarded_section (sec))
- RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
- rel, 1, relend,
- elf64_alpha_howto_table + r_type, 0,
- contents);
- if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
- rel->r_addend += sec->output_offset;
- }
- return ret_val;
- }
- /* Relocate an Alpha ELF section. */
- static int
- elf64_alpha_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
- bfd *input_bfd, asection *input_section,
- bfd_byte *contents, Elf_Internal_Rela *relocs,
- Elf_Internal_Sym *local_syms,
- asection **local_sections)
- {
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Rela *rel;
- Elf_Internal_Rela *relend;
- asection *sgot, *srel, *srelgot;
- bfd *dynobj, *gotobj;
- bfd_vma gp, tp_base, dtp_base;
- struct alpha_elf_got_entry **local_got_entries;
- bool ret_val;
- BFD_ASSERT (is_alpha_elf (input_bfd));
- /* Handle relocatable links with a smaller loop. */
- if (bfd_link_relocatable (info))
- return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd,
- input_section, contents, relocs,
- local_syms, local_sections);
- /* This is a final link. */
- ret_val = true;
- symtab_hdr = &elf_symtab_hdr (input_bfd);
- dynobj = elf_hash_table (info)->dynobj;
- srelgot = elf_hash_table (info)->srelgot;
- if (input_section->flags & SEC_ALLOC)
- {
- const char *section_name;
- section_name = (bfd_elf_string_from_elf_section
- (input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
- _bfd_elf_single_rel_hdr (input_section)->sh_name));
- BFD_ASSERT(section_name != NULL);
- srel = bfd_get_linker_section (dynobj, section_name);
- }
- else
- srel = NULL;
- /* Find the gp value for this input bfd. */
- gotobj = alpha_elf_tdata (input_bfd)->gotobj;
- if (gotobj)
- {
- sgot = alpha_elf_tdata (gotobj)->got;
- gp = _bfd_get_gp_value (gotobj);
- if (gp == 0)
- {
- gp = (sgot->output_section->vma
- + sgot->output_offset
- + 0x8000);
- _bfd_set_gp_value (gotobj, gp);
- }
- }
- else
- {
- sgot = NULL;
- gp = 0;
- }
- local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries;
- if (elf_hash_table (info)->tls_sec != NULL)
- {
- dtp_base = alpha_get_dtprel_base (info);
- tp_base = alpha_get_tprel_base (info);
- }
- else
- dtp_base = tp_base = 0;
- relend = relocs + input_section->reloc_count;
- for (rel = relocs; rel < relend; rel++)
- {
- struct alpha_elf_link_hash_entry *h = NULL;
- struct alpha_elf_got_entry *gotent;
- bfd_reloc_status_type r;
- reloc_howto_type *howto;
- unsigned long r_symndx;
- Elf_Internal_Sym *sym = NULL;
- asection *sec = NULL;
- bfd_vma value;
- bfd_vma addend;
- bool dynamic_symbol_p;
- bool unresolved_reloc = false;
- bool undef_weak_ref = false;
- unsigned long r_type;
- r_type = ELF64_R_TYPE(rel->r_info);
- if (r_type >= R_ALPHA_max)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: unsupported relocation type %#x"),
- input_bfd, (int) r_type);
- bfd_set_error (bfd_error_bad_value);
- ret_val = false;
- continue;
- }
- howto = elf64_alpha_howto_table + r_type;
- r_symndx = ELF64_R_SYM(rel->r_info);
- /* The symbol for a TLSLDM reloc is ignored. Collapse the
- reloc to the STN_UNDEF (0) symbol so that they all match. */
- if (r_type == R_ALPHA_TLSLDM)
- r_symndx = STN_UNDEF;
- if (r_symndx < symtab_hdr->sh_info)
- {
- asection *msec;
- sym = local_syms + r_symndx;
- sec = local_sections[r_symndx];
- msec = sec;
- value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel);
- /* If this is a tp-relative relocation against sym STN_UNDEF (0),
- this is hackery from relax_section. Force the value to
- be the tls module base. */
- if (r_symndx == STN_UNDEF
- && (r_type == R_ALPHA_TLSLDM
- || r_type == R_ALPHA_GOTTPREL
- || r_type == R_ALPHA_TPREL64
- || r_type == R_ALPHA_TPRELHI
- || r_type == R_ALPHA_TPRELLO
- || r_type == R_ALPHA_TPREL16))
- value = dtp_base;
- if (local_got_entries)
- gotent = local_got_entries[r_symndx];
- else
- gotent = NULL;
- /* Need to adjust local GOT entries' addends for SEC_MERGE
- unless it has been done already. */
- if ((sec->flags & SEC_MERGE)
- && ELF_ST_TYPE (sym->st_info) == STT_SECTION
- && sec->sec_info_type == SEC_INFO_TYPE_MERGE
- && gotent
- && !gotent->reloc_xlated)
- {
- struct alpha_elf_got_entry *ent;
- for (ent = gotent; ent; ent = ent->next)
- {
- ent->reloc_xlated = 1;
- if (ent->use_count == 0)
- continue;
- msec = sec;
- ent->addend =
- _bfd_merged_section_offset (output_bfd, &msec,
- elf_section_data (sec)->
- sec_info,
- sym->st_value + ent->addend);
- ent->addend -= sym->st_value;
- ent->addend += msec->output_section->vma
- + msec->output_offset
- - sec->output_section->vma
- - sec->output_offset;
- }
- }
- dynamic_symbol_p = false;
- }
- else
- {
- bool warned, ignored;
- struct elf_link_hash_entry *hh;
- struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
- RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
- r_symndx, symtab_hdr, sym_hashes,
- hh, sec, value,
- unresolved_reloc, warned, ignored);
- if (warned)
- continue;
- if (value == 0
- && ! unresolved_reloc
- && hh->root.type == bfd_link_hash_undefweak)
- undef_weak_ref = true;
- h = (struct alpha_elf_link_hash_entry *) hh;
- dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info);
- gotent = h->got_entries;
- }
- if (sec != NULL && discarded_section (sec))
- RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
- rel, 1, relend, howto, 0, contents);
- addend = rel->r_addend;
- value += addend;
- /* Search for the proper got entry. */
- for (; gotent ; gotent = gotent->next)
- if (gotent->gotobj == gotobj
- && gotent->reloc_type == r_type
- && gotent->addend == addend)
- break;
- switch (r_type)
- {
- case R_ALPHA_GPDISP:
- {
- bfd_byte *p_ldah, *p_lda;
- BFD_ASSERT(gp != 0);
- value = (input_section->output_section->vma
- + input_section->output_offset
- + rel->r_offset);
- p_ldah = contents + rel->r_offset;
- p_lda = p_ldah + rel->r_addend;
- r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - value,
- p_ldah, p_lda);
- }
- break;
- case R_ALPHA_LITERAL:
- BFD_ASSERT(sgot != NULL);
- BFD_ASSERT(gp != 0);
- BFD_ASSERT(gotent != NULL);
- BFD_ASSERT(gotent->use_count >= 1);
- if (!gotent->reloc_done)
- {
- gotent->reloc_done = 1;
- bfd_put_64 (output_bfd, value,
- sgot->contents + gotent->got_offset);
- /* If the symbol has been forced local, output a
- RELATIVE reloc, otherwise it will be handled in
- finish_dynamic_symbol. */
- if (bfd_link_pic (info)
- && !dynamic_symbol_p
- && !undef_weak_ref)
- elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
- gotent->got_offset, 0,
- R_ALPHA_RELATIVE, value);
- }
- value = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- value -= gp;
- goto default_reloc;
- case R_ALPHA_GPREL32:
- case R_ALPHA_GPREL16:
- case R_ALPHA_GPRELLOW:
- if (dynamic_symbol_p)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: gp-relative relocation against dynamic symbol %s"),
- input_bfd, h->root.root.root.string);
- ret_val = false;
- }
- BFD_ASSERT(gp != 0);
- value -= gp;
- goto default_reloc;
- case R_ALPHA_GPRELHIGH:
- if (dynamic_symbol_p)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: gp-relative relocation against dynamic symbol %s"),
- input_bfd, h->root.root.root.string);
- ret_val = false;
- }
- BFD_ASSERT(gp != 0);
- value -= gp;
- value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
- goto default_reloc;
- case R_ALPHA_HINT:
- /* A call to a dynamic symbol is definitely out of range of
- the 16-bit displacement. Don't bother writing anything. */
- if (dynamic_symbol_p)
- {
- r = bfd_reloc_ok;
- break;
- }
- /* The regular PC-relative stuff measures from the start of
- the instruction rather than the end. */
- value -= 4;
- goto default_reloc;
- case R_ALPHA_BRADDR:
- if (dynamic_symbol_p)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: pc-relative relocation against dynamic symbol %s"),
- input_bfd, h->root.root.root.string);
- ret_val = false;
- }
- /* The regular PC-relative stuff measures from the start of
- the instruction rather than the end. */
- value -= 4;
- goto default_reloc;
- case R_ALPHA_BRSGP:
- {
- int other;
- const char *name;
- /* The regular PC-relative stuff measures from the start of
- the instruction rather than the end. */
- value -= 4;
- /* The source and destination gp must be the same. Note that
- the source will always have an assigned gp, since we forced
- one in check_relocs, but that the destination may not, as
- it might not have had any relocations at all. Also take
- care not to crash if H is an undefined symbol. */
- if (h != NULL && sec != NULL
- && alpha_elf_tdata (sec->owner)->gotobj
- && gotobj != alpha_elf_tdata (sec->owner)->gotobj)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: change in gp: BRSGP %s"),
- input_bfd, h->root.root.root.string);
- ret_val = false;
- }
- /* The symbol should be marked either NOPV or STD_GPLOAD. */
- if (h != NULL)
- other = h->root.other;
- else
- other = sym->st_other;
- switch (other & STO_ALPHA_STD_GPLOAD)
- {
- case STO_ALPHA_NOPV:
- break;
- case STO_ALPHA_STD_GPLOAD:
- value += 8;
- break;
- default:
- if (h != NULL)
- name = h->root.root.root.string;
- else
- {
- name = (bfd_elf_string_from_elf_section
- (input_bfd, symtab_hdr->sh_link, sym->st_name));
- if (name == NULL)
- name = _("<unknown>");
- else if (name[0] == 0)
- name = bfd_section_name (sec);
- }
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: !samegp reloc against symbol without .prologue: %s"),
- input_bfd, name);
- ret_val = false;
- break;
- }
- goto default_reloc;
- }
- case R_ALPHA_REFLONG:
- case R_ALPHA_REFQUAD:
- case R_ALPHA_DTPREL64:
- case R_ALPHA_TPREL64:
- {
- long dynindx, dyntype = r_type;
- bfd_vma dynaddend;
- /* Careful here to remember RELATIVE relocations for global
- variables for symbolic shared objects. */
- if (dynamic_symbol_p)
- {
- BFD_ASSERT(h->root.dynindx != -1);
- dynindx = h->root.dynindx;
- dynaddend = addend;
- addend = 0, value = 0;
- }
- else if (r_type == R_ALPHA_DTPREL64)
- {
- BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
- value -= dtp_base;
- goto default_reloc;
- }
- else if (r_type == R_ALPHA_TPREL64)
- {
- BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
- if (!bfd_link_dll (info))
- {
- value -= tp_base;
- goto default_reloc;
- }
- dynindx = 0;
- dynaddend = value - dtp_base;
- }
- else if (bfd_link_pic (info)
- && r_symndx != STN_UNDEF
- && (input_section->flags & SEC_ALLOC)
- && !undef_weak_ref
- && !(unresolved_reloc
- && (_bfd_elf_section_offset (output_bfd, info,
- input_section,
- rel->r_offset)
- == (bfd_vma) -1)))
- {
- if (r_type == R_ALPHA_REFLONG)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: unhandled dynamic relocation against %s"),
- input_bfd,
- h->root.root.root.string);
- ret_val = false;
- }
- dynindx = 0;
- dyntype = R_ALPHA_RELATIVE;
- dynaddend = value;
- }
- else
- goto default_reloc;
- if (input_section->flags & SEC_ALLOC)
- elf64_alpha_emit_dynrel (output_bfd, info, input_section,
- srel, rel->r_offset, dynindx,
- dyntype, dynaddend);
- }
- goto default_reloc;
- case R_ALPHA_SREL16:
- case R_ALPHA_SREL32:
- case R_ALPHA_SREL64:
- if (dynamic_symbol_p)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: pc-relative relocation against dynamic symbol %s"),
- input_bfd, h->root.root.root.string);
- ret_val = false;
- }
- else if (bfd_link_pic (info)
- && undef_weak_ref)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: pc-relative relocation against undefined weak symbol %s"),
- input_bfd, h->root.root.root.string);
- ret_val = false;
- }
- /* ??? .eh_frame references to discarded sections will be smashed
- to relocations against SHN_UNDEF. The .eh_frame format allows
- NULL to be encoded as 0 in any format, so this works here. */
- if (r_symndx == STN_UNDEF
- || (unresolved_reloc
- && _bfd_elf_section_offset (output_bfd, info,
- input_section,
- rel->r_offset) == (bfd_vma) -1))
- howto = (elf64_alpha_howto_table
- + (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG));
- goto default_reloc;
- case R_ALPHA_TLSLDM:
- /* Ignore the symbol for the relocation. The result is always
- the current module. */
- dynamic_symbol_p = 0;
- /* FALLTHRU */
- case R_ALPHA_TLSGD:
- if (!gotent->reloc_done)
- {
- gotent->reloc_done = 1;
- /* Note that the module index for the main program is 1. */
- bfd_put_64 (output_bfd,
- !bfd_link_pic (info) && !dynamic_symbol_p,
- sgot->contents + gotent->got_offset);
- /* If the symbol has been forced local, output a
- DTPMOD64 reloc, otherwise it will be handled in
- finish_dynamic_symbol. */
- if (bfd_link_pic (info) && !dynamic_symbol_p)
- elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
- gotent->got_offset, 0,
- R_ALPHA_DTPMOD64, 0);
- if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM)
- value = 0;
- else
- {
- BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
- value -= dtp_base;
- }
- bfd_put_64 (output_bfd, value,
- sgot->contents + gotent->got_offset + 8);
- }
- value = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- value -= gp;
- goto default_reloc;
- case R_ALPHA_DTPRELHI:
- case R_ALPHA_DTPRELLO:
- case R_ALPHA_DTPREL16:
- if (dynamic_symbol_p)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: dtp-relative relocation against dynamic symbol %s"),
- input_bfd, h->root.root.root.string);
- ret_val = false;
- }
- BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
- value -= dtp_base;
- if (r_type == R_ALPHA_DTPRELHI)
- value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
- goto default_reloc;
- case R_ALPHA_TPRELHI:
- case R_ALPHA_TPRELLO:
- case R_ALPHA_TPREL16:
- if (bfd_link_dll (info))
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: TLS local exec code cannot be linked into shared objects"),
- input_bfd);
- ret_val = false;
- }
- else if (dynamic_symbol_p)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: tp-relative relocation against dynamic symbol %s"),
- input_bfd, h->root.root.root.string);
- ret_val = false;
- }
- BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
- value -= tp_base;
- if (r_type == R_ALPHA_TPRELHI)
- value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
- goto default_reloc;
- case R_ALPHA_GOTDTPREL:
- case R_ALPHA_GOTTPREL:
- BFD_ASSERT(sgot != NULL);
- BFD_ASSERT(gp != 0);
- BFD_ASSERT(gotent != NULL);
- BFD_ASSERT(gotent->use_count >= 1);
- if (!gotent->reloc_done)
- {
- gotent->reloc_done = 1;
- if (dynamic_symbol_p)
- value = 0;
- else
- {
- BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
- if (r_type == R_ALPHA_GOTDTPREL)
- value -= dtp_base;
- else if (bfd_link_executable (info))
- value -= tp_base;
- else
- {
- elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
- gotent->got_offset, 0,
- R_ALPHA_TPREL64,
- value - dtp_base);
- value = 0;
- }
- }
- bfd_put_64 (output_bfd, value,
- sgot->contents + gotent->got_offset);
- }
- value = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- value -= gp;
- goto default_reloc;
- default:
- default_reloc:
- r = _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents, rel->r_offset, value, 0);
- break;
- }
- switch (r)
- {
- case bfd_reloc_ok:
- break;
- case bfd_reloc_overflow:
- {
- const char *name;
- /* Don't warn if the overflow is due to pc relative reloc
- against discarded section. Section optimization code should
- handle it. */
- if (r_symndx < symtab_hdr->sh_info
- && sec != NULL && howto->pc_relative
- && discarded_section (sec))
- break;
- if (h != NULL)
- name = NULL;
- else
- {
- name = (bfd_elf_string_from_elf_section
- (input_bfd, symtab_hdr->sh_link, sym->st_name));
- if (name == NULL)
- return false;
- if (*name == '\0')
- name = bfd_section_name (sec);
- }
- (*info->callbacks->reloc_overflow)
- (info, (h ? &h->root.root : NULL), name, howto->name,
- (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
- }
- break;
- default:
- case bfd_reloc_outofrange:
- abort ();
- }
- }
- return ret_val;
- }
- /* Finish up dynamic symbol handling. We set the contents of various
- dynamic sections here. */
- static bool
- elf64_alpha_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
- {
- struct alpha_elf_link_hash_entry *ah = (struct alpha_elf_link_hash_entry *)h;
- if (h->needs_plt)
- {
- /* Fill in the .plt entry for this symbol. */
- asection *splt, *sgot, *srel;
- Elf_Internal_Rela outrel;
- bfd_byte *loc;
- bfd_vma got_addr, plt_addr;
- bfd_vma plt_index;
- struct alpha_elf_got_entry *gotent;
- BFD_ASSERT (h->dynindx != -1);
- splt = elf_hash_table (info)->splt;
- BFD_ASSERT (splt != NULL);
- srel = elf_hash_table (info)->srelplt;
- BFD_ASSERT (srel != NULL);
- for (gotent = ah->got_entries; gotent ; gotent = gotent->next)
- if (gotent->reloc_type == R_ALPHA_LITERAL
- && gotent->use_count > 0)
- {
- unsigned int insn;
- int disp;
- sgot = alpha_elf_tdata (gotent->gotobj)->got;
- BFD_ASSERT (sgot != NULL);
- BFD_ASSERT (gotent->got_offset != -1);
- BFD_ASSERT (gotent->plt_offset != -1);
- got_addr = (sgot->output_section->vma
- + sgot->output_offset
- + gotent->got_offset);
- plt_addr = (splt->output_section->vma
- + splt->output_offset
- + gotent->plt_offset);
- plt_index = (gotent->plt_offset-PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
- /* Fill in the entry in the procedure linkage table. */
- if (elf64_alpha_use_secureplt)
- {
- disp = (PLT_HEADER_SIZE - 4) - (gotent->plt_offset + 4);
- insn = INSN_AD (INSN_BR, 31, disp);
- bfd_put_32 (output_bfd, insn,
- splt->contents + gotent->plt_offset);
- plt_index = ((gotent->plt_offset - NEW_PLT_HEADER_SIZE)
- / NEW_PLT_ENTRY_SIZE);
- }
- else
- {
- disp = -(gotent->plt_offset + 4);
- insn = INSN_AD (INSN_BR, 28, disp);
- bfd_put_32 (output_bfd, insn,
- splt->contents + gotent->plt_offset);
- bfd_put_32 (output_bfd, INSN_UNOP,
- splt->contents + gotent->plt_offset + 4);
- bfd_put_32 (output_bfd, INSN_UNOP,
- splt->contents + gotent->plt_offset + 8);
- plt_index = ((gotent->plt_offset - OLD_PLT_HEADER_SIZE)
- / OLD_PLT_ENTRY_SIZE);
- }
- /* Fill in the entry in the .rela.plt section. */
- outrel.r_offset = got_addr;
- outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
- outrel.r_addend = 0;
- loc = srel->contents + plt_index * sizeof (Elf64_External_Rela);
- bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
- /* Fill in the entry in the .got. */
- bfd_put_64 (output_bfd, plt_addr,
- sgot->contents + gotent->got_offset);
- }
- }
- else if (alpha_elf_dynamic_symbol_p (h, info))
- {
- /* Fill in the dynamic relocations for this symbol's .got entries. */
- asection *srel;
- struct alpha_elf_got_entry *gotent;
- srel = elf_hash_table (info)->srelgot;
- BFD_ASSERT (srel != NULL);
- for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
- gotent != NULL;
- gotent = gotent->next)
- {
- asection *sgot;
- long r_type;
- if (gotent->use_count == 0)
- continue;
- sgot = alpha_elf_tdata (gotent->gotobj)->got;
- r_type = gotent->reloc_type;
- switch (r_type)
- {
- case R_ALPHA_LITERAL:
- r_type = R_ALPHA_GLOB_DAT;
- break;
- case R_ALPHA_TLSGD:
- r_type = R_ALPHA_DTPMOD64;
- break;
- case R_ALPHA_GOTDTPREL:
- r_type = R_ALPHA_DTPREL64;
- break;
- case R_ALPHA_GOTTPREL:
- r_type = R_ALPHA_TPREL64;
- break;
- case R_ALPHA_TLSLDM:
- default:
- abort ();
- }
- elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
- gotent->got_offset, h->dynindx,
- r_type, gotent->addend);
- if (gotent->reloc_type == R_ALPHA_TLSGD)
- elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
- gotent->got_offset + 8, h->dynindx,
- R_ALPHA_DTPREL64, gotent->addend);
- }
- }
- /* Mark some specially defined symbols as absolute. */
- if (h == elf_hash_table (info)->hdynamic
- || h == elf_hash_table (info)->hgot
- || h == elf_hash_table (info)->hplt)
- sym->st_shndx = SHN_ABS;
- return true;
- }
- /* Finish up the dynamic sections. */
- static bool
- elf64_alpha_finish_dynamic_sections (bfd *output_bfd,
- struct bfd_link_info *info)
- {
- bfd *dynobj;
- asection *sdyn;
- dynobj = elf_hash_table (info)->dynobj;
- sdyn = bfd_get_linker_section (dynobj, ".dynamic");
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- asection *splt, *sgotplt, *srelaplt;
- Elf64_External_Dyn *dyncon, *dynconend;
- bfd_vma plt_vma, gotplt_vma;
- splt = elf_hash_table (info)->splt;
- srelaplt = elf_hash_table (info)->srelplt;
- BFD_ASSERT (splt != NULL && sdyn != NULL);
- plt_vma = splt->output_section->vma + splt->output_offset;
- gotplt_vma = 0;
- if (elf64_alpha_use_secureplt)
- {
- sgotplt = elf_hash_table (info)->sgotplt;
- BFD_ASSERT (sgotplt != NULL);
- if (sgotplt->size > 0)
- gotplt_vma = sgotplt->output_section->vma + sgotplt->output_offset;
- }
- dyncon = (Elf64_External_Dyn *) sdyn->contents;
- dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
- bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
- switch (dyn.d_tag)
- {
- case DT_PLTGOT:
- dyn.d_un.d_ptr
- = elf64_alpha_use_secureplt ? gotplt_vma : plt_vma;
- break;
- case DT_PLTRELSZ:
- dyn.d_un.d_val = srelaplt ? srelaplt->size : 0;
- break;
- case DT_JMPREL:
- dyn.d_un.d_ptr = srelaplt ? (srelaplt->output_section->vma
- + srelaplt->output_offset) : 0;
- break;
- }
- bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
- }
- /* Initialize the plt header. */
- if (splt->size > 0)
- {
- unsigned int insn;
- int ofs;
- if (elf64_alpha_use_secureplt)
- {
- ofs = gotplt_vma - (plt_vma + PLT_HEADER_SIZE);
- insn = INSN_ABC (INSN_SUBQ, 27, 28, 25);
- bfd_put_32 (output_bfd, insn, splt->contents);
- insn = INSN_ABO (INSN_LDAH, 28, 28, (ofs + 0x8000) >> 16);
- bfd_put_32 (output_bfd, insn, splt->contents + 4);
- insn = INSN_ABC (INSN_S4SUBQ, 25, 25, 25);
- bfd_put_32 (output_bfd, insn, splt->contents + 8);
- insn = INSN_ABO (INSN_LDA, 28, 28, ofs);
- bfd_put_32 (output_bfd, insn, splt->contents + 12);
- insn = INSN_ABO (INSN_LDQ, 27, 28, 0);
- bfd_put_32 (output_bfd, insn, splt->contents + 16);
- insn = INSN_ABC (INSN_ADDQ, 25, 25, 25);
- bfd_put_32 (output_bfd, insn, splt->contents + 20);
- insn = INSN_ABO (INSN_LDQ, 28, 28, 8);
- bfd_put_32 (output_bfd, insn, splt->contents + 24);
- insn = INSN_AB (INSN_JMP, 31, 27);
- bfd_put_32 (output_bfd, insn, splt->contents + 28);
- insn = INSN_AD (INSN_BR, 28, -PLT_HEADER_SIZE);
- bfd_put_32 (output_bfd, insn, splt->contents + 32);
- }
- else
- {
- insn = INSN_AD (INSN_BR, 27, 0); /* br $27, .+4 */
- bfd_put_32 (output_bfd, insn, splt->contents);
- insn = INSN_ABO (INSN_LDQ, 27, 27, 12);
- bfd_put_32 (output_bfd, insn, splt->contents + 4);
- insn = INSN_UNOP;
- bfd_put_32 (output_bfd, insn, splt->contents + 8);
- insn = INSN_AB (INSN_JMP, 27, 27);
- bfd_put_32 (output_bfd, insn, splt->contents + 12);
- /* The next two words will be filled in by ld.so. */
- bfd_put_64 (output_bfd, 0, splt->contents + 16);
- bfd_put_64 (output_bfd, 0, splt->contents + 24);
- }
- elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0;
- }
- }
- return true;
- }
- /* We need to use a special link routine to handle the .mdebug section.
- We need to merge all instances of these sections together, not write
- them all out sequentially. */
- static bool
- elf64_alpha_final_link (bfd *abfd, struct bfd_link_info *info)
- {
- asection *o;
- struct bfd_link_order *p;
- asection *mdebug_sec;
- struct ecoff_debug_info debug;
- const struct ecoff_debug_swap *swap
- = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
- HDRR *symhdr = &debug.symbolic_header;
- void * mdebug_handle = NULL;
- struct alpha_elf_link_hash_table * htab;
- htab = alpha_elf_hash_table (info);
- if (htab == NULL)
- return false;
- /* Go through the sections and collect the mdebug information. */
- mdebug_sec = NULL;
- for (o = abfd->sections; o != (asection *) NULL; o = o->next)
- {
- if (strcmp (o->name, ".mdebug") == 0)
- {
- struct extsym_info einfo;
- /* We have found the .mdebug section in the output file.
- Look through all the link_orders comprising it and merge
- the information together. */
- symhdr->magic = swap->sym_magic;
- /* FIXME: What should the version stamp be? */
- symhdr->vstamp = 0;
- symhdr->ilineMax = 0;
- symhdr->cbLine = 0;
- symhdr->idnMax = 0;
- symhdr->ipdMax = 0;
- symhdr->isymMax = 0;
- symhdr->ioptMax = 0;
- symhdr->iauxMax = 0;
- symhdr->issMax = 0;
- symhdr->issExtMax = 0;
- symhdr->ifdMax = 0;
- symhdr->crfd = 0;
- symhdr->iextMax = 0;
- /* We accumulate the debugging information itself in the
- debug_info structure. */
- debug.line = NULL;
- debug.external_dnr = NULL;
- debug.external_pdr = NULL;
- debug.external_sym = NULL;
- debug.external_opt = NULL;
- debug.external_aux = NULL;
- debug.ss = NULL;
- debug.ssext = debug.ssext_end = NULL;
- debug.external_fdr = NULL;
- debug.external_rfd = NULL;
- debug.external_ext = debug.external_ext_end = NULL;
- mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
- if (mdebug_handle == NULL)
- return false;
- if (1)
- {
- asection *s;
- EXTR esym;
- bfd_vma last = 0;
- unsigned int i;
- static const char * const name[] =
- {
- ".text", ".init", ".fini", ".data",
- ".rodata", ".sdata", ".sbss", ".bss"
- };
- static const int sc[] = { scText, scInit, scFini, scData,
- scRData, scSData, scSBss, scBss };
- esym.jmptbl = 0;
- esym.cobol_main = 0;
- esym.weakext = 0;
- esym.reserved = 0;
- esym.ifd = ifdNil;
- esym.asym.iss = issNil;
- esym.asym.st = stLocal;
- esym.asym.reserved = 0;
- esym.asym.index = indexNil;
- for (i = 0; i < 8; i++)
- {
- esym.asym.sc = sc[i];
- s = bfd_get_section_by_name (abfd, name[i]);
- if (s != NULL)
- {
- esym.asym.value = s->vma;
- last = s->vma + s->size;
- }
- else
- esym.asym.value = last;
- if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
- name[i], &esym))
- return false;
- }
- }
- for (p = o->map_head.link_order;
- p != (struct bfd_link_order *) NULL;
- p = p->next)
- {
- asection *input_section;
- bfd *input_bfd;
- const struct ecoff_debug_swap *input_swap;
- struct ecoff_debug_info input_debug;
- char *eraw_src;
- char *eraw_end;
- if (p->type != bfd_indirect_link_order)
- {
- if (p->type == bfd_data_link_order)
- continue;
- abort ();
- }
- input_section = p->u.indirect.section;
- input_bfd = input_section->owner;
- if (! is_alpha_elf (input_bfd))
- /* I don't know what a non ALPHA ELF bfd would be
- doing with a .mdebug section, but I don't really
- want to deal with it. */
- continue;
- input_swap = (get_elf_backend_data (input_bfd)
- ->elf_backend_ecoff_debug_swap);
- BFD_ASSERT (p->size == input_section->size);
- /* The ECOFF linking code expects that we have already
- read in the debugging information and set up an
- ecoff_debug_info structure, so we do that now. */
- if (!elf64_alpha_read_ecoff_info (input_bfd, input_section,
- &input_debug))
- return false;
- if (! (bfd_ecoff_debug_accumulate
- (mdebug_handle, abfd, &debug, swap, input_bfd,
- &input_debug, input_swap, info)))
- return false;
- /* Loop through the external symbols. For each one with
- interesting information, try to find the symbol in
- the linker global hash table and save the information
- for the output external symbols. */
- eraw_src = (char *) input_debug.external_ext;
- eraw_end = (eraw_src
- + (input_debug.symbolic_header.iextMax
- * input_swap->external_ext_size));
- for (;
- eraw_src < eraw_end;
- eraw_src += input_swap->external_ext_size)
- {
- EXTR ext;
- const char *name;
- struct alpha_elf_link_hash_entry *h;
- (*input_swap->swap_ext_in) (input_bfd, eraw_src, &ext);
- if (ext.asym.sc == scNil
- || ext.asym.sc == scUndefined
- || ext.asym.sc == scSUndefined)
- continue;
- name = input_debug.ssext + ext.asym.iss;
- h = alpha_elf_link_hash_lookup (htab, name, false, false, true);
- if (h == NULL || h->esym.ifd != -2)
- continue;
- if (ext.ifd != -1)
- {
- BFD_ASSERT (ext.ifd
- < input_debug.symbolic_header.ifdMax);
- ext.ifd = input_debug.ifdmap[ext.ifd];
- }
- h->esym = ext;
- }
- /* Free up the information we just read. */
- free (input_debug.line);
- free (input_debug.external_dnr);
- free (input_debug.external_pdr);
- free (input_debug.external_sym);
- free (input_debug.external_opt);
- free (input_debug.external_aux);
- free (input_debug.ss);
- free (input_debug.ssext);
- free (input_debug.external_fdr);
- free (input_debug.external_rfd);
- free (input_debug.external_ext);
- /* Hack: reset the SEC_HAS_CONTENTS flag so that
- elf_link_input_bfd ignores this section. */
- input_section->flags &=~ SEC_HAS_CONTENTS;
- }
- /* Build the external symbol information. */
- einfo.abfd = abfd;
- einfo.info = info;
- einfo.debug = &debug;
- einfo.swap = swap;
- einfo.failed = false;
- elf_link_hash_traverse (elf_hash_table (info),
- elf64_alpha_output_extsym,
- &einfo);
- if (einfo.failed)
- return false;
- /* Set the size of the .mdebug section. */
- o->size = bfd_ecoff_debug_size (abfd, &debug, swap);
- /* Skip this section later on (I don't think this currently
- matters, but someday it might). */
- o->map_head.link_order = (struct bfd_link_order *) NULL;
- mdebug_sec = o;
- }
- }
- /* Invoke the regular ELF backend linker to do all the work. */
- if (! bfd_elf_final_link (abfd, info))
- return false;
- /* Now write out the computed sections. */
- /* The .got subsections... */
- {
- bfd *i, *dynobj = elf_hash_table(info)->dynobj;
- for (i = htab->got_list;
- i != NULL;
- i = alpha_elf_tdata(i)->got_link_next)
- {
- asection *sgot;
- /* elf_bfd_final_link already did everything in dynobj. */
- if (i == dynobj)
- continue;
- sgot = alpha_elf_tdata(i)->got;
- if (! bfd_set_section_contents (abfd, sgot->output_section,
- sgot->contents,
- (file_ptr) sgot->output_offset,
- sgot->size))
- return false;
- }
- }
- if (mdebug_sec != (asection *) NULL)
- {
- BFD_ASSERT (abfd->output_has_begun);
- if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
- swap, info,
- mdebug_sec->filepos))
- return false;
- bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
- }
- return true;
- }
- static enum elf_reloc_type_class
- elf64_alpha_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
- const asection *rel_sec ATTRIBUTE_UNUSED,
- const Elf_Internal_Rela *rela)
- {
- switch ((int) ELF64_R_TYPE (rela->r_info))
- {
- case R_ALPHA_RELATIVE:
- return reloc_class_relative;
- case R_ALPHA_JMP_SLOT:
- return reloc_class_plt;
- case R_ALPHA_COPY:
- return reloc_class_copy;
- default:
- return reloc_class_normal;
- }
- }
- static const struct bfd_elf_special_section elf64_alpha_special_sections[] =
- {
- { STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
- { STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
- { NULL, 0, 0, 0, 0 }
- };
- /* ECOFF swapping routines. These are used when dealing with the
- .mdebug section, which is in the ECOFF debugging format. Copied
- from elf32-mips.c. */
- static const struct ecoff_debug_swap
- elf64_alpha_ecoff_debug_swap =
- {
- /* Symbol table magic number. */
- magicSym2,
- /* Alignment of debugging information. E.g., 4. */
- 8,
- /* Sizes of external symbolic information. */
- sizeof (struct hdr_ext),
- sizeof (struct dnr_ext),
- sizeof (struct pdr_ext),
- sizeof (struct sym_ext),
- sizeof (struct opt_ext),
- sizeof (struct fdr_ext),
- sizeof (struct rfd_ext),
- sizeof (struct ext_ext),
- /* Functions to swap in external symbolic data. */
- ecoff_swap_hdr_in,
- ecoff_swap_dnr_in,
- ecoff_swap_pdr_in,
- ecoff_swap_sym_in,
- ecoff_swap_opt_in,
- ecoff_swap_fdr_in,
- ecoff_swap_rfd_in,
- ecoff_swap_ext_in,
- _bfd_ecoff_swap_tir_in,
- _bfd_ecoff_swap_rndx_in,
- /* Functions to swap out external symbolic data. */
- ecoff_swap_hdr_out,
- ecoff_swap_dnr_out,
- ecoff_swap_pdr_out,
- ecoff_swap_sym_out,
- ecoff_swap_opt_out,
- ecoff_swap_fdr_out,
- ecoff_swap_rfd_out,
- ecoff_swap_ext_out,
- _bfd_ecoff_swap_tir_out,
- _bfd_ecoff_swap_rndx_out,
- /* Function to read in symbolic data. */
- elf64_alpha_read_ecoff_info
- };
- /* Use a non-standard hash bucket size of 8. */
- static const struct elf_size_info alpha_elf_size_info =
- {
- sizeof (Elf64_External_Ehdr),
- sizeof (Elf64_External_Phdr),
- sizeof (Elf64_External_Shdr),
- sizeof (Elf64_External_Rel),
- sizeof (Elf64_External_Rela),
- sizeof (Elf64_External_Sym),
- sizeof (Elf64_External_Dyn),
- sizeof (Elf_External_Note),
- 8,
- 1,
- 64, 3,
- ELFCLASS64, EV_CURRENT,
- bfd_elf64_write_out_phdrs,
- bfd_elf64_write_shdrs_and_ehdr,
- bfd_elf64_checksum_contents,
- bfd_elf64_write_relocs,
- bfd_elf64_swap_symbol_in,
- bfd_elf64_swap_symbol_out,
- bfd_elf64_slurp_reloc_table,
- bfd_elf64_slurp_symbol_table,
- bfd_elf64_swap_dyn_in,
- bfd_elf64_swap_dyn_out,
- bfd_elf64_swap_reloc_in,
- bfd_elf64_swap_reloc_out,
- bfd_elf64_swap_reloca_in,
- bfd_elf64_swap_reloca_out
- };
- #define TARGET_LITTLE_SYM alpha_elf64_vec
- #define TARGET_LITTLE_NAME "elf64-alpha"
- #define ELF_ARCH bfd_arch_alpha
- #define ELF_TARGET_ID ALPHA_ELF_DATA
- #define ELF_MACHINE_CODE EM_ALPHA
- #define ELF_MAXPAGESIZE 0x10000
- #define ELF_COMMONPAGESIZE 0x2000
- #define bfd_elf64_bfd_link_hash_table_create \
- elf64_alpha_bfd_link_hash_table_create
- #define bfd_elf64_bfd_reloc_type_lookup \
- elf64_alpha_bfd_reloc_type_lookup
- #define bfd_elf64_bfd_reloc_name_lookup \
- elf64_alpha_bfd_reloc_name_lookup
- #define elf_info_to_howto \
- elf64_alpha_info_to_howto
- #define bfd_elf64_mkobject \
- elf64_alpha_mkobject
- #define elf_backend_object_p \
- elf64_alpha_object_p
- #define elf_backend_section_from_shdr \
- elf64_alpha_section_from_shdr
- #define elf_backend_section_flags \
- elf64_alpha_section_flags
- #define elf_backend_fake_sections \
- elf64_alpha_fake_sections
- #define bfd_elf64_bfd_is_local_label_name \
- elf64_alpha_is_local_label_name
- #define bfd_elf64_find_nearest_line \
- elf64_alpha_find_nearest_line
- #define bfd_elf64_bfd_relax_section \
- elf64_alpha_relax_section
- #define elf_backend_add_symbol_hook \
- elf64_alpha_add_symbol_hook
- #define elf_backend_relocs_compatible \
- _bfd_elf_relocs_compatible
- #define elf_backend_sort_relocs_p \
- elf64_alpha_sort_relocs_p
- #define elf_backend_check_relocs \
- elf64_alpha_check_relocs
- #define elf_backend_create_dynamic_sections \
- elf64_alpha_create_dynamic_sections
- #define elf_backend_adjust_dynamic_symbol \
- elf64_alpha_adjust_dynamic_symbol
- #define elf_backend_merge_symbol_attribute \
- elf64_alpha_merge_symbol_attribute
- #define elf_backend_copy_indirect_symbol \
- elf64_alpha_copy_indirect_symbol
- #define elf_backend_always_size_sections \
- elf64_alpha_always_size_sections
- #define elf_backend_size_dynamic_sections \
- elf64_alpha_size_dynamic_sections
- #define elf_backend_omit_section_dynsym \
- _bfd_elf_omit_section_dynsym_all
- #define elf_backend_relocate_section \
- elf64_alpha_relocate_section
- #define elf_backend_finish_dynamic_symbol \
- elf64_alpha_finish_dynamic_symbol
- #define elf_backend_finish_dynamic_sections \
- elf64_alpha_finish_dynamic_sections
- #define bfd_elf64_bfd_final_link \
- elf64_alpha_final_link
- #define elf_backend_reloc_type_class \
- elf64_alpha_reloc_type_class
- #define elf_backend_can_gc_sections 1
- #define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
- #define elf_backend_ecoff_debug_swap \
- &elf64_alpha_ecoff_debug_swap
- #define elf_backend_size_info \
- alpha_elf_size_info
- #define elf_backend_special_sections \
- elf64_alpha_special_sections
- #define elf_backend_strip_zero_sized_dynamic_sections \
- _bfd_elf_strip_zero_sized_dynamic_sections
- /* A few constants that determine how the .plt section is set up. */
- #define elf_backend_want_got_plt 0
- #define elf_backend_plt_readonly 0
- #define elf_backend_want_plt_sym 1
- #define elf_backend_got_header_size 0
- #define elf_backend_dtrel_excludes_plt 1
- #include "elf64-target.h"
- /* FreeBSD support. */
- #undef TARGET_LITTLE_SYM
- #define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec
- #undef TARGET_LITTLE_NAME
- #define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
- #undef ELF_OSABI
- #define ELF_OSABI ELFOSABI_FREEBSD
- /* The kernel recognizes executables as valid only if they carry a
- "FreeBSD" label in the ELF header. So we put this label on all
- executables and (for simplicity) also all other object files. */
- static bool
- elf64_alpha_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info)
- {
- Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
- if (!_bfd_elf_init_file_header (abfd, info))
- return false;
- i_ehdrp = elf_elfheader (abfd);
- /* Put an ABI label supported by FreeBSD >= 4.1. */
- i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
- #ifdef OLD_FREEBSD_ABI_LABEL
- /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
- memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
- #endif
- return true;
- }
- #undef elf_backend_init_file_header
- #define elf_backend_init_file_header \
- elf64_alpha_fbsd_init_file_header
- #undef elf64_bed
- #define elf64_bed elf64_alpha_fbsd_bed
- #include "elf64-target.h"
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