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|
- /* BFD back-end for PDP-11 a.out binaries.
- Copyright (C) 2001-2022 Free Software Foundation, Inc.
- 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. */
- /* BFD backend for PDP-11, running 2.11BSD in particular.
- This file was hacked up by looking hard at the existing vaxnetbsd
- back end and the header files in 2.11BSD. The symbol table format
- of 2.11BSD has been extended to accommodate .stab symbols. See
- struct pdp11_external_nlist below for details.
- TODO
- * support for V7 file formats
- * support for overlay object files (see 2.11 a.out(5))
- * support for old and very old archives
- (see 2.11 ar(5), historical section)
- Search for TODO to find other areas needing more work. */
- #define BYTES_IN_WORD 2
- #define BYTES_IN_LONG 4
- #define ARCH_SIZE 16
- #undef TARGET_IS_BIG_ENDIAN_P
- #define TARGET_PAGE_SIZE 8192
- #define SEGMENT__SIZE TARGET_PAGE_SIZE
- #define DEFAULT_ARCH bfd_arch_pdp11
- #define DEFAULT_MID M_PDP11
- /* Do not "beautify" the CONCAT* macro args. Traditional C will not
- remove whitespace added here, and thus will fail to concatenate
- the tokens. */
- #define MY(OP) CONCAT2 (pdp11_aout_,OP)
- /* This needs to start with a.out so GDB knows it is an a.out variant. */
- #define TARGETNAME "a.out-pdp11"
- /* This is the normal load address for executables. */
- #define TEXT_START_ADDR 0
- /* The header is not included in the text segment. */
- #define N_HEADER_IN_TEXT(x) 0
- /* There is no flags field. */
- #define N_FLAGS(execp) 0
- #define N_SET_FLAGS(execp, flags) do { } while (0)
- #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
- && N_MAGIC(x) != NMAGIC \
- && N_MAGIC(x) != IMAGIC \
- && N_MAGIC(x) != ZMAGIC)
- #include "sysdep.h"
- #include <limits.h>
- #include "bfd.h"
- #define external_exec pdp11_external_exec
- struct pdp11_external_exec
- {
- bfd_byte e_info[2]; /* Magic number. */
- bfd_byte e_text[2]; /* Length of text section in bytes. */
- bfd_byte e_data[2]; /* Length of data section in bytes. */
- bfd_byte e_bss[2]; /* Length of bss area in bytes. */
- bfd_byte e_syms[2]; /* Length of symbol table in bytes. */
- bfd_byte e_entry[2]; /* Start address. */
- bfd_byte e_unused[2]; /* Not used. */
- bfd_byte e_flag[2]; /* Relocation info stripped. */
- bfd_byte e_relocatable; /* Ugly hack. */
- };
- #define EXEC_BYTES_SIZE (8 * 2)
- #define A_MAGIC1 OMAGIC
- #define OMAGIC 0407 /* ...object file or impure executable. */
- #define A_MAGIC2 NMAGIC
- #define NMAGIC 0410 /* Pure executable. */
- #define ZMAGIC 0413 /* Demand-paged executable. */
- #define IMAGIC 0411 /* Separated I&D. */
- #define A_MAGIC3 IMAGIC
- #define A_MAGIC4 0405 /* Overlay. */
- #define A_MAGIC5 0430 /* Auto-overlay (nonseparate). */
- #define A_MAGIC6 0431 /* Auto-overlay (separate). */
- #define QMAGIC 0
- #define BMAGIC 0
- #define A_FLAG_RELOC_STRIPPED 0x0001
- /* The following struct defines the format of an entry in the object file
- symbol table. In the original 2.11BSD struct the index into the string
- table is stored as a long, but the PDP11 C convention for storing a long in
- memory placed the most significant word first even though the bytes within a
- word are stored least significant first. So here the string table index is
- considered to be just 16 bits and the first two bytes of the struct were
- previously named e_unused. To extend the symbol table format to accommodate
- .stab symbols, the e_unused bytes are renamed e_desc to store the desc field
- of the .stab symbol. The GDP Project's STABS document says that the "other"
- field is almost always unused and can be set to zero; the only nonzero cases
- identified were for stabs in their own sections, which does not apply for
- pdp11 a.out format, and for a special case of GNU Modula2 which is not
- supported for the PDP11. */
- #define external_nlist pdp11_external_nlist
- struct pdp11_external_nlist
- {
- bfd_byte e_desc[2]; /* The desc field for .stab symbols, else 0. */
- bfd_byte e_strx[2]; /* Index into string table of name. */
- bfd_byte e_type[1]; /* Type of symbol. */
- bfd_byte e_ovly[1]; /* Overlay number. */
- bfd_byte e_value[2]; /* Value of symbol. */
- };
- #define EXTERNAL_NLIST_SIZE 8
- #define N_TXTOFF(x) (EXEC_BYTES_SIZE)
- #define N_DATOFF(x) (N_TXTOFF(x) + (x)->a_text)
- #define N_TRELOFF(x) (N_DATOFF(x) + (x)->a_data)
- #define N_DRELOFF(x) (N_TRELOFF(x) + (x)->a_trsize)
- #define N_SYMOFF(x) (N_DRELOFF(x) + (x)->a_drsize)
- #define N_STROFF(x) (N_SYMOFF(x) + (x)->a_syms)
- #define WRITE_HEADERS(abfd, execp) pdp11_aout_write_headers (abfd, execp)
- #include "libbfd.h"
- #include "libaout.h"
- #define SWAP_MAGIC(ext) bfd_getl16 (ext)
- #define MY_entry_is_text_address 1
- #define MY_write_object_contents MY(write_object_contents)
- static bool MY(write_object_contents) (bfd *);
- #define MY_text_includes_header 1
- #define MY_BFD_TARGET
- #include "aout-target.h"
- /* Start of modified aoutx.h. */
- #define KEEPIT udata.i
- #include <string.h> /* For strchr and friends. */
- #include "bfd.h"
- #include "sysdep.h"
- #include "safe-ctype.h"
- #include "bfdlink.h"
- #include "libaout.h"
- #include "aout/aout64.h"
- #include "aout/stab_gnu.h"
- #include "aout/ar.h"
- /* The symbol type numbers for the 16-bit a.out format from 2.11BSD differ from
- those defined in aout64.h so we must redefine them here. N_EXT changes from
- 0x01 to 0x20 which creates a conflict with some .stab values, in particular
- between undefined externals (N_UNDF+N_EXT) vs. global variables (N_GYSM) and
- between external bss symbols (N_BSS+N_EXT) vs. function names (N_FUN). We
- disambiguate those conflicts with a hack in is_stab() to look for the ':' in
- the global variable or function name string. */
- #undef N_TYPE
- #undef N_UNDF
- #undef N_ABS
- #undef N_TEXT
- #undef N_DATA
- #undef N_BSS
- #undef N_REG
- #undef N_FN
- #undef N_EXT
- #undef N_STAB
- #define N_TYPE 0x1f /* Type mask. */
- #define N_UNDF 0x00 /* Undefined. */
- #define N_ABS 0x01 /* Absolute. */
- #define N_TEXT 0x02 /* Text segment. */
- #define N_DATA 0x03 /* Data segment. */
- #define N_BSS 0x04 /* Bss segment. */
- #define N_REG 0x14 /* Register symbol. */
- #define N_FN 0x1f /* File name. */
- #define N_EXT 0x20 /* External flag. */
- /* Type numbers from .stab entries that could conflict:
- N_GSYM 0x20 Global variable [conflict with external undef]
- N_FNAME 0x22 Function name (for BSD Fortran) [ignored]
- N_FUN 0x24 Function name [conflict with external BSS]
- N_NOMAP 0x34 No DST map for sym. [ext. reg. doesn't exist]
- */
- #define RELOC_SIZE 2
- #define RELFLG 0x0001 /* PC-relative flag. */
- #define RTYPE 0x000e /* Type mask. */
- #define RIDXMASK 0xfff0 /* Index mask. */
- #define RABS 0x00 /* Absolute. */
- #define RTEXT 0x02 /* Text. */
- #define RDATA 0x04 /* Data. */
- #define RBSS 0x06 /* Bss. */
- #define REXT 0x08 /* External. */
- #define RINDEX(x) (((x) & 0xfff0) >> 4)
- #ifndef MY_final_link_relocate
- #define MY_final_link_relocate _bfd_final_link_relocate
- #endif
- #ifndef MY_relocate_contents
- #define MY_relocate_contents _bfd_relocate_contents
- #endif
- /* A hash table used for header files with N_BINCL entries. */
- struct aout_link_includes_table
- {
- struct bfd_hash_table root;
- };
- /* A linked list of totals that we have found for a particular header
- file. */
- struct aout_link_includes_totals
- {
- struct aout_link_includes_totals *next;
- bfd_vma total;
- };
- /* An entry in the header file hash table. */
- struct aout_link_includes_entry
- {
- struct bfd_hash_entry root;
- /* List of totals we have found for this file. */
- struct aout_link_includes_totals *totals;
- };
- /* During the final link step we need to pass around a bunch of
- information, so we do it in an instance of this structure. */
- struct aout_final_link_info
- {
- /* General link information. */
- struct bfd_link_info *info;
- /* Output bfd. */
- bfd *output_bfd;
- /* Reloc file positions. */
- file_ptr treloff, dreloff;
- /* File position of symbols. */
- file_ptr symoff;
- /* String table. */
- struct bfd_strtab_hash *strtab;
- /* Header file hash table. */
- struct aout_link_includes_table includes;
- /* A buffer large enough to hold the contents of any section. */
- bfd_byte *contents;
- /* A buffer large enough to hold the relocs of any section. */
- void * relocs;
- /* A buffer large enough to hold the symbol map of any input BFD. */
- int *symbol_map;
- /* A buffer large enough to hold output symbols of any input BFD. */
- struct external_nlist *output_syms;
- };
- /* Copy of the link_info.separate_code boolean to select the output format with
- separate instruction and data spaces selected by --imagic */
- static bool separate_i_d = false;
- reloc_howto_type howto_table_pdp11[] =
- {
- /* type rs size bsz pcrel bitpos ovrf sf name part_inpl readmask setmask pcdone */
- HOWTO( 0, 0, 1, 16, false, 0, complain_overflow_signed,0,"16", true, 0x0000ffff,0x0000ffff, false),
- HOWTO( 1, 0, 1, 16, true, 0, complain_overflow_signed,0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
- HOWTO( 2, 0, 2, 32, false, 0, complain_overflow_signed,0,"32", true, 0x0000ffff,0x0000ffff, false),
- };
- #define TABLE_SIZE(TABLE) (sizeof(TABLE)/sizeof(TABLE[0]))
- static bool aout_link_check_archive_element (bfd *, struct bfd_link_info *,
- struct bfd_link_hash_entry *,
- const char *, bool *);
- static bool aout_link_add_object_symbols (bfd *, struct bfd_link_info *);
- static bool aout_link_add_symbols (bfd *, struct bfd_link_info *);
- static bool aout_link_write_symbols (struct aout_final_link_info *, bfd *);
- reloc_howto_type *
- NAME (aout, reloc_type_lookup) (bfd * abfd ATTRIBUTE_UNUSED,
- bfd_reloc_code_real_type code)
- {
- switch (code)
- {
- case BFD_RELOC_16:
- return &howto_table_pdp11[0];
- case BFD_RELOC_16_PCREL:
- return &howto_table_pdp11[1];
- case BFD_RELOC_32:
- return &howto_table_pdp11[2];
- default:
- return NULL;
- }
- }
- reloc_howto_type *
- NAME (aout, reloc_name_lookup) (bfd *abfd ATTRIBUTE_UNUSED,
- const char *r_name)
- {
- unsigned int i;
- for (i = 0;
- i < sizeof (howto_table_pdp11) / sizeof (howto_table_pdp11[0]);
- i++)
- if (howto_table_pdp11[i].name != NULL
- && strcasecmp (howto_table_pdp11[i].name, r_name) == 0)
- return &howto_table_pdp11[i];
- return NULL;
- }
- /* Disambiguate conflicts between normal symbol types and .stab symbol types
- (undefined externals N_UNDF+N_EXT vs. global variables N_GYSM and external
- bss symbols N_BSS+N_EXT vs. function names N_FUN) with a hack to look for
- the ':' in the global variable or function name string. */
- static int
- is_stab (int type, const char *name)
- {
- if (type == N_GSYM || type == N_FUN)
- return strchr (name, ':') != NULL;
- return type > N_FUN;
- }
- static int
- pdp11_aout_write_headers (bfd *abfd, struct internal_exec *execp)
- {
- struct external_exec exec_bytes;
- if (adata(abfd).magic == undecided_magic)
- NAME (aout, adjust_sizes_and_vmas) (abfd);
- execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE;
- execp->a_entry = bfd_get_start_address (abfd);
- if (obj_textsec (abfd)->reloc_count > 0
- || obj_datasec (abfd)->reloc_count > 0)
- {
- execp->a_trsize = execp->a_text;
- execp->a_drsize = execp->a_data;
- }
- else
- {
- execp->a_trsize = 0;
- execp->a_drsize = 0;
- }
- NAME (aout, swap_exec_header_out) (abfd, execp, & exec_bytes);
- if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
- return false;
- if (bfd_bwrite ((void *) &exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE, abfd)
- != EXEC_BYTES_SIZE)
- return false;
- /* Now write out reloc info, followed by syms and strings. */
- if (bfd_get_outsymbols (abfd) != NULL
- && bfd_get_symcount (abfd) != 0)
- {
- if (bfd_seek (abfd, (file_ptr) (N_SYMOFF (execp)), SEEK_SET) != 0)
- return false;
- if (! NAME (aout, write_syms) (abfd))
- return false;
- }
- if (obj_textsec (abfd)->reloc_count > 0
- || obj_datasec (abfd)->reloc_count > 0)
- {
- if (bfd_seek (abfd, (file_ptr) (N_TRELOFF (execp)), SEEK_SET) != 0
- || !NAME (aout, squirt_out_relocs) (abfd, obj_textsec (abfd))
- || bfd_seek (abfd, (file_ptr) (N_DRELOFF (execp)), SEEK_SET) != 0
- || !NAME (aout, squirt_out_relocs) (abfd, obj_datasec (abfd)))
- return false;
- }
- return true;
- }
- /* Write an object file.
- Section contents have already been written. We write the
- file header, symbols, and relocation. */
- static bool
- MY(write_object_contents) (bfd *abfd)
- {
- struct internal_exec *execp = exec_hdr (abfd);
- /* We must make certain that the magic number has been set. This
- will normally have been done by set_section_contents, but only if
- there actually are some section contents. */
- if (! abfd->output_has_begun)
- NAME (aout, adjust_sizes_and_vmas) (abfd);
- obj_reloc_entry_size (abfd) = RELOC_SIZE;
- return WRITE_HEADERS (abfd, execp);
- }
- /* Swap the information in an executable header @var{raw_bytes} taken
- from a raw byte stream memory image into the internal exec header
- structure "execp". */
- #ifndef NAME_swap_exec_header_in
- void
- NAME (aout, swap_exec_header_in) (bfd *abfd,
- struct external_exec *bytes,
- struct internal_exec *execp)
- {
- /* The internal_exec structure has some fields that are unused in this
- configuration (IE for i960), so ensure that all such uninitialized
- fields are zero'd out. There are places where two of these structs
- are memcmp'd, and thus the contents do matter. */
- memset ((void *) execp, 0, sizeof (struct internal_exec));
- /* Now fill in fields in the execp, from the bytes in the raw data. */
- execp->a_info = GET_MAGIC (abfd, bytes->e_info);
- execp->a_text = GET_WORD (abfd, bytes->e_text);
- execp->a_data = GET_WORD (abfd, bytes->e_data);
- execp->a_bss = GET_WORD (abfd, bytes->e_bss);
- execp->a_syms = GET_WORD (abfd, bytes->e_syms);
- execp->a_entry = GET_WORD (abfd, bytes->e_entry);
- if (GET_WORD (abfd, bytes->e_flag) & A_FLAG_RELOC_STRIPPED)
- {
- execp->a_trsize = 0;
- execp->a_drsize = 0;
- }
- else
- {
- execp->a_trsize = execp->a_text;
- execp->a_drsize = execp->a_data;
- }
- }
- #define NAME_swap_exec_header_in NAME (aout, swap_exec_header_in)
- #endif
- /* Swap the information in an internal exec header structure
- "execp" into the buffer "bytes" ready for writing to disk. */
- void
- NAME (aout, swap_exec_header_out) (bfd *abfd,
- struct internal_exec *execp,
- struct external_exec *bytes)
- {
- /* Now fill in fields in the raw data, from the fields in the exec struct. */
- PUT_MAGIC (abfd, execp->a_info, bytes->e_info);
- PUT_WORD (abfd, execp->a_text, bytes->e_text);
- PUT_WORD (abfd, execp->a_data, bytes->e_data);
- PUT_WORD (abfd, execp->a_bss, bytes->e_bss);
- PUT_WORD (abfd, execp->a_syms, bytes->e_syms);
- PUT_WORD (abfd, execp->a_entry, bytes->e_entry);
- PUT_WORD (abfd, 0, bytes->e_unused);
- if ((execp->a_trsize == 0 || execp->a_text == 0)
- && (execp->a_drsize == 0 || execp->a_data == 0))
- PUT_WORD (abfd, A_FLAG_RELOC_STRIPPED, bytes->e_flag);
- else if (execp->a_trsize == execp->a_text
- && execp->a_drsize == execp->a_data)
- PUT_WORD (abfd, 0, bytes->e_flag);
- else
- {
- /* TODO: print a proper warning message. */
- fprintf (stderr, "BFD:%s:%d: internal error\n", __FILE__, __LINE__);
- PUT_WORD (abfd, 0, bytes->e_flag);
- }
- }
- /* Make all the section for an a.out file. */
- bool
- NAME (aout, make_sections) (bfd *abfd)
- {
- if (obj_textsec (abfd) == NULL && bfd_make_section (abfd, ".text") == NULL)
- return false;
- if (obj_datasec (abfd) == NULL && bfd_make_section (abfd, ".data") == NULL)
- return false;
- if (obj_bsssec (abfd) == NULL && bfd_make_section (abfd, ".bss") == NULL)
- return false;
- return true;
- }
- /* Some a.out variant thinks that the file open in ABFD
- checking is an a.out file. Do some more checking, and set up
- for access if it really is. Call back to the calling
- environment's "finish up" function just before returning, to
- handle any last-minute setup. */
- bfd_cleanup
- NAME (aout, some_aout_object_p) (bfd *abfd,
- struct internal_exec *execp,
- bfd_cleanup (*callback_to_real_object_p) (bfd *))
- {
- struct aout_data_struct *rawptr, *oldrawptr;
- bfd_cleanup cleanup;
- size_t amt = sizeof (struct aout_data_struct);
- rawptr = bfd_zalloc (abfd, amt);
- if (rawptr == NULL)
- return 0;
- oldrawptr = abfd->tdata.aout_data;
- abfd->tdata.aout_data = rawptr;
- /* Copy the contents of the old tdata struct. */
- if (oldrawptr != NULL)
- *abfd->tdata.aout_data = *oldrawptr;
- abfd->tdata.aout_data->a.hdr = &rawptr->e;
- *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct. */
- execp = abfd->tdata.aout_data->a.hdr;
- /* Set the file flags. */
- abfd->flags = BFD_NO_FLAGS;
- if (execp->a_drsize || execp->a_trsize)
- abfd->flags |= HAS_RELOC;
- /* Setting of EXEC_P has been deferred to the bottom of this function. */
- if (execp->a_syms)
- abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
- if (N_DYNAMIC (execp))
- abfd->flags |= DYNAMIC;
- if (N_MAGIC (execp) == ZMAGIC)
- {
- abfd->flags |= D_PAGED | WP_TEXT;
- adata (abfd).magic = z_magic;
- }
- else if (N_MAGIC (execp) == NMAGIC)
- {
- abfd->flags |= WP_TEXT;
- adata (abfd).magic = n_magic;
- }
- else if (N_MAGIC (execp) == OMAGIC)
- adata (abfd).magic = o_magic;
- else if (N_MAGIC (execp) == IMAGIC)
- adata (abfd).magic = i_magic;
- else
- {
- /* Should have been checked with N_BADMAG before this routine
- was called. */
- abort ();
- }
- abfd->start_address = execp->a_entry;
- obj_aout_symbols (abfd) = NULL;
- abfd->symcount = execp->a_syms / sizeof (struct external_nlist);
- /* The default relocation entry size is that of traditional V7 Unix. */
- obj_reloc_entry_size (abfd) = RELOC_SIZE;
- /* The default symbol entry size is that of traditional Unix. */
- obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
- #ifdef USE_MMAP
- bfd_init_window (&obj_aout_sym_window (abfd));
- bfd_init_window (&obj_aout_string_window (abfd));
- #endif
- obj_aout_external_syms (abfd) = NULL;
- obj_aout_external_strings (abfd) = NULL;
- obj_aout_sym_hashes (abfd) = NULL;
- if (! NAME (aout, make_sections) (abfd))
- return NULL;
- obj_datasec (abfd)->size = execp->a_data;
- obj_bsssec (abfd)->size = execp->a_bss;
- obj_textsec (abfd)->flags =
- (execp->a_trsize != 0
- ? (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC)
- : (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
- obj_datasec (abfd)->flags =
- (execp->a_drsize != 0
- ? (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC)
- : (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
- obj_bsssec (abfd)->flags = SEC_ALLOC;
- #ifdef THIS_IS_ONLY_DOCUMENTATION
- /* The common code can't fill in these things because they depend
- on either the start address of the text segment, the rounding
- up of virtual addresses between segments, or the starting file
- position of the text segment -- all of which varies among different
- versions of a.out. */
- /* Call back to the format-dependent code to fill in the rest of the
- fields and do any further cleanup. Things that should be filled
- in by the callback: */
- struct exec *execp = exec_hdr (abfd);
- obj_textsec (abfd)->size = N_TXTSIZE (execp);
- /* Data and bss are already filled in since they're so standard. */
- /* The virtual memory addresses of the sections. */
- obj_textsec (abfd)->vma = N_TXTADDR (execp);
- obj_datasec (abfd)->vma = N_DATADDR (execp);
- obj_bsssec (abfd)->vma = N_BSSADDR (execp);
- /* The file offsets of the sections. */
- obj_textsec (abfd)->filepos = N_TXTOFF (execp);
- obj_datasec (abfd)->filepos = N_DATOFF (execp);
- /* The file offsets of the relocation info. */
- obj_textsec (abfd)->rel_filepos = N_TRELOFF (execp);
- obj_datasec (abfd)->rel_filepos = N_DRELOFF (execp);
- /* The file offsets of the string table and symbol table. */
- obj_str_filepos (abfd) = N_STROFF (execp);
- obj_sym_filepos (abfd) = N_SYMOFF (execp);
- /* Determine the architecture and machine type of the object file. */
- abfd->obj_arch = bfd_arch_obscure;
- adata(abfd)->page_size = TARGET_PAGE_SIZE;
- adata(abfd)->segment_size = SEGMENT_SIZE;
- adata(abfd)->exec_bytes_size = EXEC_BYTES_SIZE;
- return _bfd_no_cleanup;
- /* The architecture is encoded in various ways in various a.out variants,
- or is not encoded at all in some of them. The relocation size depends
- on the architecture and the a.out variant. Finally, the return value
- is the bfd_target vector in use. If an error occurs, return zero and
- set bfd_error to the appropriate error code.
- Formats such as b.out, which have additional fields in the a.out
- header, should cope with them in this callback as well. */
- #endif /* DOCUMENTATION */
- cleanup = (*callback_to_real_object_p)(abfd);
- /* Now that the segment addresses have been worked out, take a better
- guess at whether the file is executable. If the entry point
- is within the text segment, assume it is. (This makes files
- executable even if their entry point address is 0, as long as
- their text starts at zero.).
- This test had to be changed to deal with systems where the text segment
- runs at a different location than the default. The problem is that the
- entry address can appear to be outside the text segment, thus causing an
- erroneous conclusion that the file isn't executable.
- To fix this, we now accept any non-zero entry point as an indication of
- executability. This will work most of the time, since only the linker
- sets the entry point, and that is likely to be non-zero for most systems. */
- if (execp->a_entry != 0
- || (execp->a_entry >= obj_textsec (abfd)->vma
- && execp->a_entry < (obj_textsec (abfd)->vma
- + obj_textsec (abfd)->size)
- && execp->a_trsize == 0
- && execp->a_drsize == 0))
- abfd->flags |= EXEC_P;
- #ifdef STAT_FOR_EXEC
- else
- {
- struct stat stat_buf;
- /* The original heuristic doesn't work in some important cases.
- The a.out file has no information about the text start
- address. For files (like kernels) linked to non-standard
- addresses (ld -Ttext nnn) the entry point may not be between
- the default text start (obj_textsec(abfd)->vma) and
- (obj_textsec(abfd)->vma) + text size. This is not just a mach
- issue. Many kernels are loaded at non standard addresses. */
- if (abfd->iostream != NULL
- && (abfd->flags & BFD_IN_MEMORY) == 0
- && (fstat(fileno((FILE *) (abfd->iostream)), &stat_buf) == 0)
- && ((stat_buf.st_mode & 0111) != 0))
- abfd->flags |= EXEC_P;
- }
- #endif /* STAT_FOR_EXEC */
- if (!cleanup)
- {
- free (rawptr);
- abfd->tdata.aout_data = oldrawptr;
- }
- return cleanup;
- }
- /* Initialize ABFD for use with a.out files. */
- bool
- NAME (aout, mkobject) (bfd *abfd)
- {
- struct aout_data_struct *rawptr;
- size_t amt = sizeof (struct aout_data_struct);
- bfd_set_error (bfd_error_system_call);
- /* Use an intermediate variable for clarity. */
- rawptr = bfd_zalloc (abfd, amt);
- if (rawptr == NULL)
- return false;
- abfd->tdata.aout_data = rawptr;
- exec_hdr (abfd) = &(rawptr->e);
- obj_textsec (abfd) = NULL;
- obj_datasec (abfd) = NULL;
- obj_bsssec (abfd) = NULL;
- return true;
- }
- /* Keep track of machine architecture and machine type for
- a.out's. Return the <<machine_type>> for a particular
- architecture and machine, or <<M_UNKNOWN>> if that exact architecture
- and machine can't be represented in a.out format.
- If the architecture is understood, machine type 0 (default)
- is always understood. */
- enum machine_type
- NAME (aout, machine_type) (enum bfd_architecture arch,
- unsigned long machine,
- bool *unknown)
- {
- enum machine_type arch_flags;
- arch_flags = M_UNKNOWN;
- *unknown = true;
- switch (arch)
- {
- case bfd_arch_sparc:
- if (machine == 0
- || machine == bfd_mach_sparc
- || machine == bfd_mach_sparc_sparclite
- || machine == bfd_mach_sparc_v9)
- arch_flags = M_SPARC;
- else if (machine == bfd_mach_sparc_sparclet)
- arch_flags = M_SPARCLET;
- break;
- case bfd_arch_i386:
- if (machine == 0
- || machine == bfd_mach_i386_i386
- || machine == bfd_mach_i386_i386_intel_syntax)
- arch_flags = M_386;
- break;
- case bfd_arch_arm:
- if (machine == 0) arch_flags = M_ARM;
- break;
- case bfd_arch_mips:
- switch (machine)
- {
- case 0:
- case 2000:
- case bfd_mach_mips3000:
- arch_flags = M_MIPS1;
- break;
- case bfd_mach_mips4000: /* MIPS3 */
- case bfd_mach_mips4400:
- case bfd_mach_mips8000: /* MIPS4 */
- case bfd_mach_mips6000: /* Real MIPS2: */
- arch_flags = M_MIPS2;
- break;
- default:
- arch_flags = M_UNKNOWN;
- break;
- }
- break;
- case bfd_arch_ns32k:
- switch (machine)
- {
- case 0: arch_flags = M_NS32532; break;
- case 32032: arch_flags = M_NS32032; break;
- case 32532: arch_flags = M_NS32532; break;
- default: arch_flags = M_UNKNOWN; break;
- }
- break;
- case bfd_arch_pdp11:
- /* TODO: arch_flags = M_PDP11; */
- *unknown = false;
- break;
- case bfd_arch_vax:
- *unknown = false;
- break;
- default:
- arch_flags = M_UNKNOWN;
- }
- if (arch_flags != M_UNKNOWN)
- *unknown = false;
- return arch_flags;
- }
- /* Set the architecture and the machine of the ABFD to the
- values ARCH and MACHINE. Verify that @ABFD's format
- can support the architecture required. */
- bool
- NAME (aout, set_arch_mach) (bfd *abfd,
- enum bfd_architecture arch,
- unsigned long machine)
- {
- if (! bfd_default_set_arch_mach (abfd, arch, machine))
- return false;
- if (arch != bfd_arch_unknown)
- {
- bool unknown;
- NAME (aout, machine_type) (arch, machine, &unknown);
- if (unknown)
- return false;
- }
- obj_reloc_entry_size (abfd) = RELOC_SIZE;
- return (*aout_backend_info(abfd)->set_sizes) (abfd);
- }
- static void
- adjust_o_magic (bfd *abfd, struct internal_exec *execp)
- {
- file_ptr pos = adata (abfd).exec_bytes_size;
- bfd_vma vma = 0;
- int pad = 0;
- asection *text = obj_textsec (abfd);
- asection *data = obj_datasec (abfd);
- asection *bss = obj_bsssec (abfd);
- /* Text. */
- text->filepos = pos;
- if (!text->user_set_vma)
- text->vma = vma;
- else
- vma = text->vma;
- pos += execp->a_text;
- vma += execp->a_text;
- /* Data. */
- if (!data->user_set_vma)
- {
- pos += pad;
- vma += pad;
- data->vma = vma;
- }
- else
- vma = data->vma;
- execp->a_text += pad;
- data->filepos = pos;
- pos += data->size;
- vma += data->size;
- /* BSS. */
- if (!bss->user_set_vma)
- {
- pos += pad;
- vma += pad;
- bss->vma = vma;
- }
- else if (data->size > 0 || bss->size > 0) /* PR25677: for objcopy --extract-symbol */
- {
- /* The VMA of the .bss section is set by the VMA of the
- .data section plus the size of the .data section. We may
- need to add padding bytes to make this true. */
- pad = bss->vma - vma;
- if (pad < 0)
- pad = 0;
- pos += pad;
- }
- execp->a_data = data->size + pad;
- bss->filepos = pos;
- execp->a_bss = bss->size;
- N_SET_MAGIC (execp, OMAGIC);
- }
- static void
- adjust_z_magic (bfd *abfd, struct internal_exec *execp)
- {
- bfd_size_type data_pad, text_pad;
- file_ptr text_end;
- const struct aout_backend_data *abdp;
- /* TRUE if text includes exec header. */
- bool ztih;
- asection *text = obj_textsec (abfd);
- asection *data = obj_datasec (abfd);
- asection *bss = obj_bsssec (abfd);
- abdp = aout_backend_info (abfd);
- /* Text. */
- ztih = (abdp != NULL
- && (abdp->text_includes_header
- || obj_aout_subformat (abfd) == q_magic_format));
- text->filepos = (ztih
- ? adata (abfd).exec_bytes_size
- : adata (abfd).zmagic_disk_block_size);
- if (!text->user_set_vma)
- {
- /* ?? Do we really need to check for relocs here? */
- text->vma = ((abfd->flags & HAS_RELOC)
- ? 0
- : (ztih
- ? abdp->default_text_vma + adata (abfd).exec_bytes_size
- : abdp->default_text_vma));
- text_pad = 0;
- }
- else
- {
- /* The .text section is being loaded at an unusual address. We
- may need to pad it such that the .data section starts at a page
- boundary. */
- if (ztih)
- text_pad = ((text->filepos - text->vma)
- & (adata (abfd).page_size - 1));
- else
- text_pad = (-text->vma
- & (adata (abfd).page_size - 1));
- }
- /* Find start of data. */
- if (ztih)
- {
- text_end = text->filepos + execp->a_text;
- text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
- }
- else
- {
- /* Note that if page_size == zmagic_disk_block_size, then
- filepos == page_size, and this case is the same as the ztih
- case. */
- text_end = execp->a_text;
- text_pad += BFD_ALIGN (text_end, adata (abfd).page_size) - text_end;
- text_end += text->filepos;
- }
- execp->a_text += text_pad;
- /* Data. */
- if (!data->user_set_vma)
- {
- bfd_vma vma;
- vma = text->vma + execp->a_text;
- data->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
- }
- if (abdp && abdp->zmagic_mapped_contiguous)
- {
- text_pad = data->vma - (text->vma + execp->a_text);
- /* Only pad the text section if the data
- section is going to be placed after it. */
- if (text_pad > 0)
- execp->a_text += text_pad;
- }
- data->filepos = text->filepos + execp->a_text;
- /* Fix up exec header while we're at it. */
- if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
- execp->a_text += adata (abfd).exec_bytes_size;
- N_SET_MAGIC (execp, ZMAGIC);
- /* Spec says data section should be rounded up to page boundary. */
- execp->a_data = align_power (data->size, bss->alignment_power);
- execp->a_data = BFD_ALIGN (execp->a_data, adata (abfd).page_size);
- data_pad = execp->a_data - data->size;
- /* BSS. */
- if (!bss->user_set_vma)
- bss->vma = data->vma + execp->a_data;
- /* If the BSS immediately follows the data section and extra space
- in the page is left after the data section, fudge data
- in the header so that the bss section looks smaller by that
- amount. We'll start the bss section there, and lie to the OS.
- (Note that a linker script, as well as the above assignment,
- could have explicitly set the BSS vma to immediately follow
- the data section.) */
- if (align_power (bss->vma, bss->alignment_power) == data->vma + execp->a_data)
- execp->a_bss = data_pad > bss->size ? 0 : bss->size - data_pad;
- else
- execp->a_bss = bss->size;
- }
- static void
- adjust_n_magic (bfd *abfd, struct internal_exec *execp)
- {
- file_ptr pos = adata (abfd).exec_bytes_size;
- bfd_vma vma = 0;
- int pad;
- asection *text = obj_textsec (abfd);
- asection *data = obj_datasec (abfd);
- asection *bss = obj_bsssec (abfd);
- /* Text. */
- text->filepos = pos;
- if (!text->user_set_vma)
- text->vma = vma;
- else
- vma = text->vma;
- pos += execp->a_text;
- vma += execp->a_text;
- /* Data. */
- data->filepos = pos;
- if (!data->user_set_vma)
- data->vma = BFD_ALIGN (vma, adata (abfd).segment_size);
- vma = data->vma;
- /* Since BSS follows data immediately, see if it needs alignment. */
- vma += data->size;
- pad = align_power (vma, bss->alignment_power) - vma;
- execp->a_data = data->size + pad;
- pos += execp->a_data;
- /* BSS. */
- if (!bss->user_set_vma)
- bss->vma = vma;
- else
- vma = bss->vma;
- /* Fix up exec header. */
- execp->a_bss = bss->size;
- N_SET_MAGIC (execp, NMAGIC);
- }
- static void
- adjust_i_magic (bfd *abfd, struct internal_exec *execp)
- {
- file_ptr pos = adata (abfd).exec_bytes_size;
- bfd_vma vma = 0;
- int pad;
- asection *text = obj_textsec (abfd);
- asection *data = obj_datasec (abfd);
- asection *bss = obj_bsssec (abfd);
- /* Text. */
- text->filepos = pos;
- if (!text->user_set_vma)
- text->vma = vma;
- else
- vma = text->vma;
- pos += execp->a_text;
- /* Data. */
- data->filepos = pos;
- if (!data->user_set_vma)
- data->vma = 0;
- vma = data->vma;
- /* Since BSS follows data immediately, see if it needs alignment. */
- vma += data->size;
- pad = align_power (vma, bss->alignment_power) - vma;
- execp->a_data = data->size + pad;
- pos += execp->a_data;
- /* BSS. */
- if (!bss->user_set_vma)
- bss->vma = vma;
- else
- vma = bss->vma;
- /* Fix up exec header. */
- execp->a_bss = bss->size;
- N_SET_MAGIC (execp, IMAGIC);
- }
- bool
- NAME (aout, adjust_sizes_and_vmas) (bfd *abfd)
- {
- struct internal_exec *execp = exec_hdr (abfd);
- if (! NAME (aout, make_sections) (abfd))
- return false;
- if (adata (abfd).magic != undecided_magic)
- return true;
- execp->a_text = align_power (obj_textsec (abfd)->size,
- obj_textsec (abfd)->alignment_power);
- /* Rule (heuristic) for when to pad to a new page. Note that there
- are (at least) two ways demand-paged (ZMAGIC) files have been
- handled. Most Berkeley-based systems start the text segment at
- (TARGET_PAGE_SIZE). However, newer versions of SUNOS start the text
- segment right after the exec header; the latter is counted in the
- text segment size, and is paged in by the kernel with the rest of
- the text. */
- /* This perhaps isn't the right way to do this, but made it simpler for me
- to understand enough to implement it. Better would probably be to go
- right from BFD flags to alignment/positioning characteristics. But the
- old code was sloppy enough about handling the flags, and had enough
- other magic, that it was a little hard for me to understand. I think
- I understand it better now, but I haven't time to do the cleanup this
- minute. */
- if (separate_i_d)
- adata (abfd).magic = i_magic;
- else if (abfd->flags & WP_TEXT)
- adata (abfd).magic = n_magic;
- else
- adata (abfd).magic = o_magic;
- #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
- #if __GNUC__ >= 2
- fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
- ({ char *str;
- switch (adata (abfd).magic)
- {
- case n_magic: str = "NMAGIC"; break;
- case o_magic: str = "OMAGIC"; break;
- case i_magic: str = "IMAGIC"; break;
- case z_magic: str = "ZMAGIC"; break;
- default: abort ();
- }
- str;
- }),
- obj_textsec (abfd)->vma, obj_textsec (abfd)->size,
- obj_textsec (abfd)->alignment_power,
- obj_datasec (abfd)->vma, obj_datasec (abfd)->size,
- obj_datasec (abfd)->alignment_power,
- obj_bsssec (abfd)->vma, obj_bsssec (abfd)->size,
- obj_bsssec (abfd)->alignment_power);
- #endif
- #endif
- switch (adata (abfd).magic)
- {
- case o_magic:
- adjust_o_magic (abfd, execp);
- break;
- case z_magic:
- adjust_z_magic (abfd, execp);
- break;
- case n_magic:
- adjust_n_magic (abfd, execp);
- break;
- case i_magic:
- adjust_i_magic (abfd, execp);
- break;
- default:
- abort ();
- }
- #ifdef BFD_AOUT_DEBUG
- fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
- obj_textsec (abfd)->vma, execp->a_text,
- obj_textsec (abfd)->filepos,
- obj_datasec (abfd)->vma, execp->a_data,
- obj_datasec (abfd)->filepos,
- obj_bsssec (abfd)->vma, execp->a_bss);
- #endif
- return true;
- }
- /* Called by the BFD in response to a bfd_make_section request. */
- bool
- NAME (aout, new_section_hook) (bfd *abfd, asection *newsect)
- {
- /* Align to double at least. */
- newsect->alignment_power = bfd_get_arch_info(abfd)->section_align_power;
- if (bfd_get_format (abfd) == bfd_object)
- {
- if (obj_textsec (abfd) == NULL
- && !strcmp (newsect->name, ".text"))
- {
- obj_textsec(abfd)= newsect;
- newsect->target_index = N_TEXT;
- }
- else if (obj_datasec (abfd) == NULL
- && !strcmp (newsect->name, ".data"))
- {
- obj_datasec (abfd) = newsect;
- newsect->target_index = N_DATA;
- }
- else if (obj_bsssec (abfd) == NULL
- && !strcmp (newsect->name, ".bss"))
- {
- obj_bsssec (abfd) = newsect;
- newsect->target_index = N_BSS;
- }
- }
- /* We allow more than three sections internally. */
- return _bfd_generic_new_section_hook (abfd, newsect);
- }
- bool
- NAME (aout, set_section_contents) (bfd *abfd,
- sec_ptr section,
- const void * location,
- file_ptr offset,
- bfd_size_type count)
- {
- if (! abfd->output_has_begun)
- {
- if (! NAME (aout, adjust_sizes_and_vmas) (abfd))
- return false;
- }
- if (section == obj_bsssec (abfd))
- {
- bfd_set_error (bfd_error_no_contents);
- return false;
- }
- if (section != obj_textsec (abfd)
- && section != obj_datasec (abfd))
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: can not represent section `%pA' in a.out object file format"),
- abfd, section);
- bfd_set_error (bfd_error_nonrepresentable_section);
- return false;
- }
- if (count != 0)
- {
- if (bfd_seek (abfd, section->filepos + offset, SEEK_SET) != 0
- || bfd_bwrite (location, count, abfd) != count)
- return false;
- }
- return true;
- }
- /* Read the external symbols from an a.out file. */
- static bool
- aout_get_external_symbols (bfd *abfd)
- {
- if (obj_aout_external_syms (abfd) == NULL)
- {
- bfd_size_type count;
- struct external_nlist *syms;
- count = exec_hdr (abfd)->a_syms / EXTERNAL_NLIST_SIZE;
- /* PR 17512: file: 011f5a08. */
- if (count == 0)
- {
- obj_aout_external_syms (abfd) = NULL;
- obj_aout_external_sym_count (abfd) = count;
- return true;
- }
- #ifdef USE_MMAP
- if (! bfd_get_file_window (abfd, obj_sym_filepos (abfd),
- exec_hdr (abfd)->a_syms,
- &obj_aout_sym_window (abfd), true))
- return false;
- syms = (struct external_nlist *) obj_aout_sym_window (abfd).data;
- #else
- /* We allocate using malloc to make the values easy to free
- later on. If we put them on the objalloc it might not be
- possible to free them. */
- if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0)
- return false;
- syms = (struct external_nlist *)
- _bfd_malloc_and_read (abfd, count * EXTERNAL_NLIST_SIZE,
- count * EXTERNAL_NLIST_SIZE);
- if (syms == NULL)
- return false;
- #endif
- obj_aout_external_syms (abfd) = syms;
- obj_aout_external_sym_count (abfd) = count;
- }
- if (obj_aout_external_strings (abfd) == NULL
- && exec_hdr (abfd)->a_syms != 0)
- {
- unsigned char string_chars[BYTES_IN_LONG];
- bfd_size_type stringsize;
- char *strings;
- bfd_size_type amt = BYTES_IN_LONG;
- /* Get the size of the strings. */
- if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
- || bfd_bread ((void *) string_chars, amt, abfd) != amt)
- return false;
- stringsize = H_GET_32 (abfd, string_chars);
- if (stringsize == 0)
- stringsize = 1;
- else if (stringsize < BYTES_IN_LONG
- || (size_t) stringsize != stringsize)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- #ifdef USE_MMAP
- if (stringsize >= BYTES_IN_LONG)
- {
- if (! bfd_get_file_window (abfd, obj_str_filepos (abfd), stringsize + 1,
- &obj_aout_string_window (abfd), true))
- return false;
- strings = (char *) obj_aout_string_window (abfd).data;
- }
- else
- #endif
- {
- strings = (char *) bfd_malloc (stringsize + 1);
- if (strings == NULL)
- return false;
- if (stringsize >= BYTES_IN_LONG)
- {
- amt = stringsize - BYTES_IN_LONG;
- if (bfd_bread (strings + BYTES_IN_LONG, amt, abfd) != amt)
- {
- free (strings);
- return false;
- }
- }
- }
- /* Ensure that a zero index yields an empty string. */
- if (stringsize >= BYTES_IN_WORD)
- memset (strings, 0, BYTES_IN_LONG);
- /* Ensure that the string buffer is NUL terminated. */
- strings[stringsize] = 0;
- obj_aout_external_strings (abfd) = strings;
- obj_aout_external_string_size (abfd) = stringsize;
- }
- return true;
- }
- /* Translate an a.out symbol into a BFD symbol. The desc, other, type
- and symbol->value fields of CACHE_PTR will be set from the a.out
- nlist structure. This function is responsible for setting
- symbol->flags and symbol->section, and adjusting symbol->value. */
- static bool
- translate_from_native_sym_flags (bfd *abfd,
- aout_symbol_type *cache_ptr)
- {
- flagword visible;
- if (is_stab (cache_ptr->type, cache_ptr->symbol.name))
- {
- asection *sec;
- /* This is a debugging symbol. */
- cache_ptr->symbol.flags = BSF_DEBUGGING;
- /* Work out the symbol section. */
- switch (cache_ptr->type)
- {
- case N_SO:
- case N_SOL:
- case N_FUN:
- case N_ENTRY:
- case N_SLINE:
- case N_FN:
- sec = obj_textsec (abfd);
- break;
- case N_STSYM:
- case N_DSLINE:
- sec = obj_datasec (abfd);
- break;
- case N_LCSYM:
- case N_BSLINE:
- sec = obj_bsssec (abfd);
- break;
- default:
- sec = bfd_abs_section_ptr;
- break;
- }
- cache_ptr->symbol.section = sec;
- cache_ptr->symbol.value -= sec->vma;
- return true;
- }
- /* Get the default visibility. This does not apply to all types, so
- we just hold it in a local variable to use if wanted. */
- if ((cache_ptr->type & N_EXT) == 0)
- visible = BSF_LOCAL;
- else
- visible = BSF_GLOBAL;
- switch (cache_ptr->type)
- {
- default:
- case N_ABS: case N_ABS | N_EXT:
- cache_ptr->symbol.section = bfd_abs_section_ptr;
- cache_ptr->symbol.flags = visible;
- break;
- case N_UNDF | N_EXT:
- if (cache_ptr->symbol.value != 0)
- {
- /* This is a common symbol. */
- cache_ptr->symbol.flags = BSF_GLOBAL;
- cache_ptr->symbol.section = bfd_com_section_ptr;
- }
- else
- {
- cache_ptr->symbol.flags = 0;
- cache_ptr->symbol.section = bfd_und_section_ptr;
- }
- break;
- case N_TEXT: case N_TEXT | N_EXT:
- cache_ptr->symbol.section = obj_textsec (abfd);
- cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
- cache_ptr->symbol.flags = visible;
- break;
- case N_DATA: case N_DATA | N_EXT:
- cache_ptr->symbol.section = obj_datasec (abfd);
- cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
- cache_ptr->symbol.flags = visible;
- break;
- case N_BSS: case N_BSS | N_EXT:
- cache_ptr->symbol.section = obj_bsssec (abfd);
- cache_ptr->symbol.value -= cache_ptr->symbol.section->vma;
- cache_ptr->symbol.flags = visible;
- break;
- }
- return true;
- }
- /* Set the fields of SYM_POINTER according to CACHE_PTR. */
- static bool
- translate_to_native_sym_flags (bfd *abfd,
- asymbol *cache_ptr,
- struct external_nlist *sym_pointer)
- {
- bfd_vma value = cache_ptr->value;
- asection *sec;
- bfd_vma off;
- const char *name = cache_ptr->name != NULL ? cache_ptr->name : "*unknown*";
- /* Mask out any existing type bits in case copying from one section
- to another. */
- if (!is_stab (sym_pointer->e_type[0], name))
- sym_pointer->e_type[0] &= ~N_TYPE;
- sec = bfd_asymbol_section (cache_ptr);
- off = 0;
- if (sec == NULL)
- {
- /* This case occurs, e.g., for the *DEBUG* section of a COFF
- file. */
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: can not represent section for symbol `%s' in a.out object file format"),
- abfd, name);
- bfd_set_error (bfd_error_nonrepresentable_section);
- return false;
- }
- if (sec->output_section != NULL)
- {
- off = sec->output_offset;
- sec = sec->output_section;
- }
- if (bfd_is_abs_section (sec))
- sym_pointer->e_type[0] |= N_ABS;
- else if (sec == obj_textsec (abfd))
- sym_pointer->e_type[0] |= N_TEXT;
- else if (sec == obj_datasec (abfd))
- sym_pointer->e_type[0] |= N_DATA;
- else if (sec == obj_bsssec (abfd))
- sym_pointer->e_type[0] |= N_BSS;
- else if (bfd_is_und_section (sec))
- sym_pointer->e_type[0] = N_UNDF | N_EXT;
- else if (bfd_is_com_section (sec))
- sym_pointer->e_type[0] = N_UNDF | N_EXT;
- else
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: can not represent section `%pA' in a.out object file format"),
- abfd, sec);
- bfd_set_error (bfd_error_nonrepresentable_section);
- return false;
- }
- /* Turn the symbol from section relative to absolute again */
- value += sec->vma + off;
- if ((cache_ptr->flags & BSF_DEBUGGING) != 0)
- sym_pointer->e_type[0] = ((aout_symbol_type *) cache_ptr)->type;
- else if ((cache_ptr->flags & BSF_GLOBAL) != 0)
- sym_pointer->e_type[0] |= N_EXT;
- PUT_WORD(abfd, value, sym_pointer->e_value);
- return true;
- }
- /* Native-level interface to symbols. */
- asymbol *
- NAME (aout, make_empty_symbol) (bfd *abfd)
- {
- size_t amt = sizeof (aout_symbol_type);
- aout_symbol_type *new_symbol_type = bfd_zalloc (abfd, amt);
- if (!new_symbol_type)
- return NULL;
- new_symbol_type->symbol.the_bfd = abfd;
- return &new_symbol_type->symbol;
- }
- /* Translate a set of external symbols into internal symbols. */
- bool
- NAME (aout, translate_symbol_table) (bfd *abfd,
- aout_symbol_type *in,
- struct external_nlist *ext,
- bfd_size_type count,
- char *str,
- bfd_size_type strsize,
- bool dynamic)
- {
- struct external_nlist *ext_end;
- ext_end = ext + count;
- for (; ext < ext_end; ext++, in++)
- {
- bfd_vma x;
- int ovly;
- x = GET_WORD (abfd, ext->e_strx);
- in->symbol.the_bfd = abfd;
- /* For the normal symbols, the zero index points at the number
- of bytes in the string table but is to be interpreted as the
- null string. For the dynamic symbols, the number of bytes in
- the string table is stored in the __DYNAMIC structure and the
- zero index points at an actual string. */
- if (x == 0 && ! dynamic)
- in->symbol.name = "";
- else if (x < strsize)
- in->symbol.name = str + x;
- else
- {
- _bfd_error_handler
- (_("%pB: invalid string offset %" PRIu64 " >= %" PRIu64),
- abfd, (uint64_t) x, (uint64_t) strsize);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- ovly = H_GET_8 (abfd, ext->e_ovly);
- if (ovly != 0)
- {
- _bfd_error_handler
- (_("%pB: symbol indicates overlay (not supported)"), abfd);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- in->symbol.value = GET_WORD (abfd, ext->e_value);
- /* e_desc is zero for normal symbols but for .stab symbols it
- carries the desc field in our extended 2.11BSD format. */
- in->desc = H_GET_16 (abfd, ext->e_desc);
- in->other = 0;
- in->type = H_GET_8 (abfd, ext->e_type);
- in->symbol.udata.p = NULL;
- if (! translate_from_native_sym_flags (abfd, in))
- return false;
- if (dynamic)
- in->symbol.flags |= BSF_DYNAMIC;
- }
- return true;
- }
- /* We read the symbols into a buffer, which is discarded when this
- function exits. We read the strings into a buffer large enough to
- hold them all plus all the cached symbol entries. */
- bool
- NAME (aout, slurp_symbol_table) (bfd *abfd)
- {
- struct external_nlist *old_external_syms;
- aout_symbol_type *cached;
- bfd_size_type cached_size;
- /* If there's no work to be done, don't do any. */
- if (obj_aout_symbols (abfd) != NULL)
- return true;
- old_external_syms = obj_aout_external_syms (abfd);
- if (! aout_get_external_symbols (abfd))
- return false;
- cached_size = obj_aout_external_sym_count (abfd);
- cached_size *= sizeof (aout_symbol_type);
- cached = bfd_zmalloc (cached_size);
- if (cached == NULL && cached_size != 0)
- return false;
- /* Convert from external symbol information to internal. */
- if (! (NAME (aout, translate_symbol_table)
- (abfd, cached,
- obj_aout_external_syms (abfd),
- obj_aout_external_sym_count (abfd),
- obj_aout_external_strings (abfd),
- obj_aout_external_string_size (abfd),
- false)))
- {
- free (cached);
- return false;
- }
- abfd->symcount = obj_aout_external_sym_count (abfd);
- obj_aout_symbols (abfd) = cached;
- /* It is very likely that anybody who calls this function will not
- want the external symbol information, so if it was allocated
- because of our call to aout_get_external_symbols, we free it up
- right away to save space. */
- if (old_external_syms == NULL
- && obj_aout_external_syms (abfd) != NULL)
- {
- #ifdef USE_MMAP
- bfd_free_window (&obj_aout_sym_window (abfd));
- #else
- free (obj_aout_external_syms (abfd));
- #endif
- obj_aout_external_syms (abfd) = NULL;
- }
- return true;
- }
- /* We use a hash table when writing out symbols so that we only write
- out a particular string once. This helps particularly when the
- linker writes out stabs debugging entries, because each different
- contributing object file tends to have many duplicate stabs
- strings.
- This hash table code breaks dbx on SunOS 4.1.3, so we don't do it
- if BFD_TRADITIONAL_FORMAT is set. */
- /* Get the index of a string in a strtab, adding it if it is not
- already present. */
- static inline bfd_size_type
- add_to_stringtab (bfd *abfd,
- struct bfd_strtab_hash *tab,
- const char *str,
- bool copy)
- {
- bool hash;
- bfd_size_type str_index;
- /* An index of 0 always means the empty string. */
- if (str == 0 || *str == '\0')
- return 0;
- /* Don't hash if BFD_TRADITIONAL_FORMAT is set, because SunOS dbx
- doesn't understand a hashed string table. */
- hash = true;
- if ((abfd->flags & BFD_TRADITIONAL_FORMAT) != 0)
- hash = false;
- str_index = _bfd_stringtab_add (tab, str, hash, copy);
- if (str_index != (bfd_size_type) -1)
- /* Add BYTES_IN_LONG to the return value to account for the
- space taken up by the string table size. */
- str_index += BYTES_IN_LONG;
- return str_index;
- }
- /* Write out a strtab. ABFD is already at the right location in the
- file. */
- static bool
- emit_stringtab (bfd *abfd, struct bfd_strtab_hash *tab)
- {
- bfd_byte buffer[BYTES_IN_LONG];
- /* The string table starts with the size. */
- H_PUT_32 (abfd, _bfd_stringtab_size (tab) + BYTES_IN_LONG, buffer);
- if (bfd_bwrite ((void *) buffer, (bfd_size_type) BYTES_IN_LONG, abfd)
- != BYTES_IN_LONG)
- return false;
- return _bfd_stringtab_emit (abfd, tab);
- }
- bool
- NAME (aout, write_syms) (bfd *abfd)
- {
- unsigned int count ;
- asymbol **generic = bfd_get_outsymbols (abfd);
- struct bfd_strtab_hash *strtab;
- strtab = _bfd_stringtab_init ();
- if (strtab == NULL)
- return false;
- for (count = 0; count < bfd_get_symcount (abfd); count++)
- {
- asymbol *g = generic[count];
- bfd_size_type indx;
- struct external_nlist nsp;
- indx = add_to_stringtab (abfd, strtab, g->name, false);
- if (indx == (bfd_size_type) -1)
- goto error_return;
- PUT_WORD (abfd, indx, nsp.e_strx);
- if (bfd_asymbol_flavour(g) == abfd->xvec->flavour)
- {
- H_PUT_16 (abfd, aout_symbol (g)->desc, nsp.e_desc);
- H_PUT_8 (abfd, 0, nsp.e_ovly);
- H_PUT_8 (abfd, aout_symbol (g)->type, nsp.e_type);
- }
- else
- {
- H_PUT_16 (abfd, 0, nsp.e_desc);
- H_PUT_8 (abfd, 0, nsp.e_ovly);
- H_PUT_8 (abfd, 0, nsp.e_type);
- }
- if (! translate_to_native_sym_flags (abfd, g, &nsp))
- goto error_return;
- if (bfd_bwrite ((void *)&nsp, (bfd_size_type) EXTERNAL_NLIST_SIZE, abfd)
- != EXTERNAL_NLIST_SIZE)
- goto error_return;
- /* NB: `KEEPIT' currently overlays `udata.p', so set this only
- here, at the end. */
- g->KEEPIT = count;
- }
- if (! emit_stringtab (abfd, strtab))
- goto error_return;
- _bfd_stringtab_free (strtab);
- return true;
- error_return:
- _bfd_stringtab_free (strtab);
- return false;
- }
- long
- NAME (aout, canonicalize_symtab) (bfd *abfd, asymbol **location)
- {
- unsigned int counter = 0;
- aout_symbol_type *symbase;
- if (!NAME (aout, slurp_symbol_table) (abfd))
- return -1;
- for (symbase = obj_aout_symbols (abfd); counter++ < bfd_get_symcount (abfd);)
- *(location++) = (asymbol *)(symbase++);
- *location++ =0;
- return bfd_get_symcount (abfd);
- }
- /* Output extended relocation information to a file in target byte order. */
- static void
- pdp11_aout_swap_reloc_out (bfd *abfd, arelent *g, bfd_byte *natptr)
- {
- int r_index;
- int r_pcrel;
- int reloc_entry;
- int r_type;
- asymbol *sym = *(g->sym_ptr_ptr);
- asection *output_section = sym->section->output_section;
- if (g->addend != 0)
- fprintf (stderr, "BFD: can't do this reloc addend stuff\n");
- r_pcrel = g->howto->pc_relative;
- if (bfd_is_abs_section (output_section))
- r_type = RABS;
- else if (output_section == obj_textsec (abfd))
- r_type = RTEXT;
- else if (output_section == obj_datasec (abfd))
- r_type = RDATA;
- else if (output_section == obj_bsssec (abfd))
- r_type = RBSS;
- else if (bfd_is_und_section (output_section))
- r_type = REXT;
- else if (bfd_is_com_section (output_section))
- r_type = REXT;
- else
- r_type = -1;
- BFD_ASSERT (r_type != -1);
- if (r_type == RABS)
- r_index = 0;
- else
- r_index = (*(g->sym_ptr_ptr))->KEEPIT;
- reloc_entry = r_index << 4 | r_type | r_pcrel;
- PUT_WORD (abfd, reloc_entry, natptr);
- }
- /* BFD deals internally with all things based from the section they're
- in. so, something in 10 bytes into a text section with a base of
- 50 would have a symbol (.text+10) and know .text vma was 50.
- Aout keeps all it's symbols based from zero, so the symbol would
- contain 60. This macro subs the base of each section from the value
- to give the true offset from the section */
- #define MOVE_ADDRESS(ad) \
- if (r_extern) \
- { \
- /* Undefined symbol. */ \
- if (r_index < bfd_get_symcount (abfd)) \
- cache_ptr->sym_ptr_ptr = symbols + r_index; \
- cache_ptr->addend = ad; \
- } \
- else \
- { \
- /* Defined, section relative. replace symbol with pointer to \
- symbol which points to section. */ \
- switch (r_index) \
- { \
- case N_TEXT: \
- case N_TEXT | N_EXT: \
- cache_ptr->sym_ptr_ptr = obj_textsec (abfd)->symbol_ptr_ptr; \
- cache_ptr->addend = ad - su->textsec->vma; \
- break; \
- case N_DATA: \
- case N_DATA | N_EXT: \
- cache_ptr->sym_ptr_ptr = obj_datasec (abfd)->symbol_ptr_ptr; \
- cache_ptr->addend = ad - su->datasec->vma; \
- break; \
- case N_BSS: \
- case N_BSS | N_EXT: \
- cache_ptr->sym_ptr_ptr = obj_bsssec (abfd)->symbol_ptr_ptr; \
- cache_ptr->addend = ad - su->bsssec->vma; \
- break; \
- default: \
- case N_ABS: \
- case N_ABS | N_EXT: \
- cache_ptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; \
- cache_ptr->addend = ad; \
- break; \
- } \
- }
- static void
- pdp11_aout_swap_reloc_in (bfd * abfd,
- bfd_byte * bytes,
- arelent * cache_ptr,
- bfd_size_type offset,
- asymbol ** symbols,
- bfd_size_type symcount)
- {
- struct aoutdata *su = &(abfd->tdata.aout_data->a);
- unsigned int r_index;
- int reloc_entry;
- int r_extern;
- int r_pcrel;
- reloc_entry = GET_WORD (abfd, (void *) bytes);
- r_pcrel = reloc_entry & RELFLG;
- cache_ptr->address = offset;
- cache_ptr->howto = howto_table_pdp11 + (r_pcrel ? 1 : 0);
- if ((reloc_entry & RTYPE) == RABS)
- r_index = N_ABS;
- else
- r_index = RINDEX (reloc_entry);
- /* r_extern reflects whether the symbol the reloc is against is
- local or global. */
- r_extern = (reloc_entry & RTYPE) == REXT;
- if (r_extern && r_index >= symcount)
- {
- /* We could arrange to return an error, but it might be useful
- to see the file even if it is bad. FIXME: Of course this
- means that objdump -r *doesn't* see the actual reloc, and
- objcopy silently writes a different reloc. */
- r_extern = 0;
- r_index = N_ABS;
- }
- MOVE_ADDRESS(0);
- }
- /* Read and swap the relocs for a section. */
- bool
- NAME (aout, slurp_reloc_table) (bfd *abfd, sec_ptr asect, asymbol **symbols)
- {
- bfd_byte *rptr;
- bfd_size_type count;
- bfd_size_type reloc_size;
- void * relocs;
- arelent *reloc_cache;
- size_t each_size;
- unsigned int counter = 0;
- arelent *cache_ptr;
- if (asect->relocation)
- return true;
- if (asect->flags & SEC_CONSTRUCTOR)
- return true;
- if (asect == obj_datasec (abfd))
- reloc_size = exec_hdr(abfd)->a_drsize;
- else if (asect == obj_textsec (abfd))
- reloc_size = exec_hdr(abfd)->a_trsize;
- else if (asect == obj_bsssec (abfd))
- reloc_size = 0;
- else
- {
- bfd_set_error (bfd_error_invalid_operation);
- return false;
- }
- if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0)
- return false;
- relocs = _bfd_malloc_and_read (abfd, reloc_size, reloc_size);
- if (relocs == NULL && reloc_size != 0)
- return false;
- each_size = obj_reloc_entry_size (abfd);
- count = reloc_size / each_size;
- /* Count the number of NON-ZERO relocs, this is the count we want. */
- {
- unsigned int real_count = 0;
- for (counter = 0; counter < count; counter++)
- {
- int x;
- x = GET_WORD (abfd, (char *) relocs + each_size * counter);
- if (x != 0)
- real_count++;
- }
- count = real_count;
- }
- reloc_cache = bfd_zmalloc (count * sizeof (arelent));
- if (reloc_cache == NULL && count != 0)
- return false;
- cache_ptr = reloc_cache;
- rptr = relocs;
- for (counter = 0;
- counter < count;
- counter++, rptr += RELOC_SIZE, cache_ptr++)
- {
- while (GET_WORD (abfd, (void *) rptr) == 0)
- {
- rptr += RELOC_SIZE;
- if ((char *) rptr >= (char *) relocs + reloc_size)
- goto done;
- }
- pdp11_aout_swap_reloc_in (abfd, rptr, cache_ptr,
- (bfd_size_type) ((char *) rptr - (char *) relocs),
- symbols,
- (bfd_size_type) bfd_get_symcount (abfd));
- }
- done:
- /* Just in case, if rptr >= relocs + reloc_size should happen
- too early. */
- BFD_ASSERT (counter == count);
- free (relocs);
- asect->relocation = reloc_cache;
- asect->reloc_count = cache_ptr - reloc_cache;
- return true;
- }
- /* Write out a relocation section into an object file. */
- bool
- NAME (aout, squirt_out_relocs) (bfd *abfd, asection *section)
- {
- arelent **generic;
- unsigned char *native;
- unsigned int count = section->reloc_count;
- bfd_size_type natsize;
- natsize = section->size;
- native = bfd_zalloc (abfd, natsize);
- if (!native)
- return false;
- generic = section->orelocation;
- if (generic != NULL)
- {
- while (count > 0)
- {
- bfd_byte *r;
- if ((*generic)->howto == NULL
- || (*generic)->sym_ptr_ptr == NULL)
- {
- bfd_set_error (bfd_error_invalid_operation);
- _bfd_error_handler (_("%pB: attempt to write out "
- "unknown reloc type"), abfd);
- bfd_release (abfd, native);
- return false;
- }
- r = native + (*generic)->address;
- pdp11_aout_swap_reloc_out (abfd, *generic, r);
- count--;
- generic++;
- }
- }
- if (bfd_bwrite ((void *) native, natsize, abfd) != natsize)
- {
- bfd_release (abfd, native);
- return false;
- }
- bfd_release (abfd, native);
- return true;
- }
- /* This is stupid. This function should be a boolean predicate. */
- long
- NAME (aout, canonicalize_reloc) (bfd *abfd,
- sec_ptr section,
- arelent **relptr,
- asymbol **symbols)
- {
- arelent *tblptr = section->relocation;
- unsigned int count;
- if (section == obj_bsssec (abfd))
- {
- *relptr = NULL;
- return 0;
- }
- if (!(tblptr || NAME (aout, slurp_reloc_table)(abfd, section, symbols)))
- return -1;
- if (section->flags & SEC_CONSTRUCTOR)
- {
- arelent_chain *chain = section->constructor_chain;
- for (count = 0; count < section->reloc_count; count ++)
- {
- *relptr ++ = &chain->relent;
- chain = chain->next;
- }
- }
- else
- {
- tblptr = section->relocation;
- for (count = 0; count++ < section->reloc_count;)
- *relptr++ = tblptr++;
- }
- *relptr = 0;
- return section->reloc_count;
- }
- long
- NAME (aout, get_reloc_upper_bound) (bfd *abfd, sec_ptr asect)
- {
- bfd_size_type count;
- if (bfd_get_format (abfd) != bfd_object)
- {
- bfd_set_error (bfd_error_invalid_operation);
- return -1;
- }
- if (asect->flags & SEC_CONSTRUCTOR)
- count = asect->reloc_count;
- else if (asect == obj_datasec (abfd))
- count = exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
- else if (asect == obj_textsec (abfd))
- count = exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
- else if (asect == obj_bsssec (abfd))
- count = 0;
- else
- {
- bfd_set_error (bfd_error_invalid_operation);
- return -1;
- }
- if (count >= LONG_MAX / sizeof (arelent *))
- {
- bfd_set_error (bfd_error_file_too_big);
- return -1;
- }
- return (count + 1) * sizeof (arelent *);
- }
- long
- NAME (aout, get_symtab_upper_bound) (bfd *abfd)
- {
- if (!NAME (aout, slurp_symbol_table) (abfd))
- return -1;
- return (bfd_get_symcount (abfd) + 1) * (sizeof (aout_symbol_type *));
- }
- alent *
- NAME (aout, get_lineno) (bfd * abfd ATTRIBUTE_UNUSED,
- asymbol * symbol ATTRIBUTE_UNUSED)
- {
- return NULL;
- }
- void
- NAME (aout, get_symbol_info) (bfd * abfd ATTRIBUTE_UNUSED,
- asymbol *symbol,
- symbol_info *ret)
- {
- bfd_symbol_info (symbol, ret);
- if (ret->type == '?')
- {
- int type_code = aout_symbol(symbol)->type & 0xff;
- const char *stab_name = bfd_get_stab_name (type_code);
- static char buf[10];
- if (stab_name == NULL)
- {
- sprintf(buf, "(%d)", type_code);
- stab_name = buf;
- }
- ret->type = '-';
- ret->stab_type = type_code;
- ret->stab_other = (unsigned) (aout_symbol(symbol)->other & 0xff);
- ret->stab_desc = (unsigned) (aout_symbol(symbol)->desc & 0xffff);
- ret->stab_name = stab_name;
- }
- }
- void
- NAME (aout, print_symbol) (bfd * abfd,
- void * afile,
- asymbol *symbol,
- bfd_print_symbol_type how)
- {
- FILE *file = (FILE *) afile;
- switch (how)
- {
- case bfd_print_symbol_name:
- if (symbol->name)
- fprintf(file,"%s", symbol->name);
- break;
- case bfd_print_symbol_more:
- fprintf(file,"%4x %2x %2x",
- (unsigned) (aout_symbol (symbol)->desc & 0xffff),
- (unsigned) (aout_symbol (symbol)->other & 0xff),
- (unsigned) (aout_symbol (symbol)->type));
- break;
- case bfd_print_symbol_all:
- {
- const char *section_name = symbol->section->name;
- bfd_print_symbol_vandf (abfd, (void *) file, symbol);
- fprintf (file," %-5s %04x %02x %02x",
- section_name,
- (unsigned) (aout_symbol (symbol)->desc & 0xffff),
- (unsigned) (aout_symbol (symbol)->other & 0xff),
- (unsigned) (aout_symbol (symbol)->type & 0xff));
- if (symbol->name)
- fprintf(file," %s", symbol->name);
- }
- break;
- }
- }
- /* If we don't have to allocate more than 1MB to hold the generic
- symbols, we use the generic minisymbol method: it's faster, since
- it only translates the symbols once, not multiple times. */
- #define MINISYM_THRESHOLD (1000000 / sizeof (asymbol))
- /* Read minisymbols. For minisymbols, we use the unmodified a.out
- symbols. The minisymbol_to_symbol function translates these into
- BFD asymbol structures. */
- long
- NAME (aout, read_minisymbols) (bfd *abfd,
- bool dynamic,
- void * *minisymsp,
- unsigned int *sizep)
- {
- if (dynamic)
- /* We could handle the dynamic symbols here as well, but it's
- easier to hand them off. */
- return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
- if (! aout_get_external_symbols (abfd))
- return -1;
- if (obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
- return _bfd_generic_read_minisymbols (abfd, dynamic, minisymsp, sizep);
- *minisymsp = (void *) obj_aout_external_syms (abfd);
- /* By passing the external symbols back from this routine, we are
- giving up control over the memory block. Clear
- obj_aout_external_syms, so that we do not try to free it
- ourselves. */
- obj_aout_external_syms (abfd) = NULL;
- *sizep = EXTERNAL_NLIST_SIZE;
- return obj_aout_external_sym_count (abfd);
- }
- /* Convert a minisymbol to a BFD asymbol. A minisymbol is just an
- unmodified a.out symbol. The SYM argument is a structure returned
- by bfd_make_empty_symbol, which we fill in here. */
- asymbol *
- NAME (aout, minisymbol_to_symbol) (bfd *abfd,
- bool dynamic,
- const void * minisym,
- asymbol *sym)
- {
- if (dynamic
- || obj_aout_external_sym_count (abfd) < MINISYM_THRESHOLD)
- return _bfd_generic_minisymbol_to_symbol (abfd, dynamic, minisym, sym);
- memset (sym, 0, sizeof (aout_symbol_type));
- /* We call translate_symbol_table to translate a single symbol. */
- if (! (NAME (aout, translate_symbol_table)
- (abfd,
- (aout_symbol_type *) sym,
- (struct external_nlist *) minisym,
- (bfd_size_type) 1,
- obj_aout_external_strings (abfd),
- obj_aout_external_string_size (abfd),
- false)))
- return NULL;
- return sym;
- }
- /* Provided a BFD, a section and an offset into the section, calculate
- and return the name of the source file and the line nearest to the
- wanted location. */
- bool
- NAME (aout, 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)
- {
- /* Run down the file looking for the filename, function and linenumber. */
- asymbol **p;
- const char *directory_name = NULL;
- const char *main_file_name = NULL;
- const char *current_file_name = NULL;
- const char *line_file_name = NULL; /* Value of current_file_name at line number. */
- bfd_vma low_line_vma = 0;
- bfd_vma low_func_vma = 0;
- asymbol *func = 0;
- size_t filelen, funclen;
- char *buf;
- *filename_ptr = bfd_get_filename (abfd);
- *functionname_ptr = NULL;
- *line_ptr = 0;
- if (discriminator_ptr)
- *discriminator_ptr = 0;
- if (symbols != NULL)
- {
- for (p = symbols; *p; p++)
- {
- aout_symbol_type *q = (aout_symbol_type *)(*p);
- next:
- switch (q->type)
- {
- case N_TEXT:
- /* If this looks like a file name symbol, and it comes after
- the line number we have found so far, but before the
- offset, then we have probably not found the right line
- number. */
- if (q->symbol.value <= offset
- && ((q->symbol.value > low_line_vma
- && (line_file_name != NULL
- || *line_ptr != 0))
- || (q->symbol.value > low_func_vma
- && func != NULL)))
- {
- const char * symname;
- symname = q->symbol.name;
- if (symname != NULL
- && strlen (symname) > 2
- && strcmp (symname + strlen (symname) - 2, ".o") == 0)
- {
- if (q->symbol.value > low_line_vma)
- {
- *line_ptr = 0;
- line_file_name = NULL;
- }
- if (q->symbol.value > low_func_vma)
- func = NULL;
- }
- }
- break;
- case N_SO:
- /* If this symbol is less than the offset, but greater than
- the line number we have found so far, then we have not
- found the right line number. */
- if (q->symbol.value <= offset)
- {
- if (q->symbol.value > low_line_vma)
- {
- *line_ptr = 0;
- line_file_name = NULL;
- }
- if (q->symbol.value > low_func_vma)
- func = NULL;
- }
- main_file_name = current_file_name = q->symbol.name;
- /* Look ahead to next symbol to check if that too is an N_SO. */
- p++;
- if (*p == NULL)
- goto done;
- q = (aout_symbol_type *)(*p);
- if (q->type != (int) N_SO)
- goto next;
- /* Found a second N_SO First is directory; second is filename. */
- directory_name = current_file_name;
- main_file_name = current_file_name = q->symbol.name;
- if (obj_textsec(abfd) != section)
- goto done;
- break;
- case N_SOL:
- current_file_name = q->symbol.name;
- break;
- case N_SLINE:
- case N_DSLINE:
- case N_BSLINE:
- /* We'll keep this if it resolves nearer than the one we have
- already. */
- if (q->symbol.value >= low_line_vma
- && q->symbol.value <= offset)
- {
- *line_ptr = q->desc;
- low_line_vma = q->symbol.value;
- line_file_name = current_file_name;
- }
- break;
- case N_FUN:
- {
- /* We'll keep this if it is nearer than the one we have already. */
- if (q->symbol.value >= low_func_vma &&
- q->symbol.value <= offset)
- {
- low_func_vma = q->symbol.value;
- func = (asymbol *) q;
- }
- else if (q->symbol.value > offset)
- goto done;
- }
- break;
- }
- }
- }
- done:
- if (*line_ptr != 0)
- main_file_name = line_file_name;
- if (main_file_name == NULL
- || main_file_name[0] == '/'
- || directory_name == NULL)
- filelen = 0;
- else
- filelen = strlen (directory_name) + strlen (main_file_name);
- if (func == NULL)
- funclen = 0;
- else
- funclen = strlen (bfd_asymbol_name (func));
- free (adata (abfd).line_buf);
- if (filelen + funclen == 0)
- adata (abfd).line_buf = buf = NULL;
- else
- {
- buf = bfd_malloc ((bfd_size_type) filelen + funclen + 3);
- adata (abfd).line_buf = buf;
- if (buf == NULL)
- return false;
- }
- if (main_file_name != NULL)
- {
- if (main_file_name[0] == '/' || directory_name == NULL)
- *filename_ptr = main_file_name;
- else
- {
- if (buf == NULL)
- /* PR binutils/20891: In a corrupt input file both
- main_file_name and directory_name can be empty... */
- * filename_ptr = NULL;
- else
- {
- snprintf (buf, filelen + 1, "%s%s", directory_name,
- main_file_name);
- *filename_ptr = buf;
- buf += filelen + 1;
- }
- }
- }
- if (func)
- {
- const char *function = func->name;
- char *colon;
- if (buf == NULL)
- {
- /* PR binutils/20892: In a corrupt input file func can be empty. */
- * functionname_ptr = NULL;
- return true;
- }
- /* The caller expects a symbol name. We actually have a
- function name, without the leading underscore. Put the
- underscore back in, so that the caller gets a symbol name. */
- if (bfd_get_symbol_leading_char (abfd) == '\0')
- strcpy (buf, function);
- else
- {
- buf[0] = bfd_get_symbol_leading_char (abfd);
- strcpy (buf + 1, function);
- }
- /* Have to remove : stuff. */
- colon = strchr (buf, ':');
- if (colon != NULL)
- *colon = '\0';
- *functionname_ptr = buf;
- }
- return true;
- }
- int
- NAME (aout, sizeof_headers) (bfd *abfd,
- struct bfd_link_info *info ATTRIBUTE_UNUSED)
- {
- return adata (abfd).exec_bytes_size;
- }
- /* Free all information we have cached for this BFD. We can always
- read it again later if we need it. */
- bool
- NAME (aout, bfd_free_cached_info) (bfd *abfd)
- {
- asection *o;
- if (bfd_get_format (abfd) != bfd_object)
- return true;
- #define BFCI_FREE(x) do { free (x); x = NULL; } while (0)
- BFCI_FREE (obj_aout_symbols (abfd));
- #ifdef USE_MMAP
- obj_aout_external_syms (abfd) = 0;
- bfd_free_window (&obj_aout_sym_window (abfd));
- bfd_free_window (&obj_aout_string_window (abfd));
- obj_aout_external_strings (abfd) = 0;
- #else
- BFCI_FREE (obj_aout_external_syms (abfd));
- BFCI_FREE (obj_aout_external_strings (abfd));
- #endif
- for (o = abfd->sections; o != NULL; o = o->next)
- BFCI_FREE (o->relocation);
- #undef BFCI_FREE
- return true;
- }
- /* Routine to create an entry in an a.out link hash table. */
- struct bfd_hash_entry *
- NAME (aout, link_hash_newfunc) (struct bfd_hash_entry *entry,
- struct bfd_hash_table *table,
- const char *string)
- {
- struct aout_link_hash_entry *ret = (struct aout_link_hash_entry *) entry;
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (ret == NULL)
- ret = bfd_hash_allocate (table, sizeof (* ret));
- if (ret == NULL)
- return NULL;
- /* Call the allocation method of the superclass. */
- ret = (struct aout_link_hash_entry *)
- _bfd_link_hash_newfunc ((struct bfd_hash_entry *) ret, table, string);
- if (ret)
- {
- /* Set local fields. */
- ret->written = false;
- ret->indx = -1;
- }
- return (struct bfd_hash_entry *) ret;
- }
- /* Initialize an a.out link hash table. */
- bool
- NAME (aout, link_hash_table_init) (struct aout_link_hash_table *table,
- bfd *abfd,
- struct bfd_hash_entry *(*newfunc) (struct bfd_hash_entry *,
- struct bfd_hash_table *,
- const char *),
- unsigned int entsize)
- {
- return _bfd_link_hash_table_init (&table->root, abfd, newfunc, entsize);
- }
- /* Create an a.out link hash table. */
- struct bfd_link_hash_table *
- NAME (aout, link_hash_table_create) (bfd *abfd)
- {
- struct aout_link_hash_table *ret;
- size_t amt = sizeof (struct aout_link_hash_table);
- ret = bfd_malloc (amt);
- if (ret == NULL)
- return NULL;
- if (! NAME (aout, link_hash_table_init) (ret, abfd,
- NAME (aout, link_hash_newfunc),
- sizeof (struct aout_link_hash_entry)))
- {
- free (ret);
- return NULL;
- }
- return &ret->root;
- }
- /* Free up the internal symbols read from an a.out file. */
- static bool
- aout_link_free_symbols (bfd *abfd)
- {
- if (obj_aout_external_syms (abfd) != NULL)
- {
- #ifdef USE_MMAP
- bfd_free_window (&obj_aout_sym_window (abfd));
- #else
- free ((void *) obj_aout_external_syms (abfd));
- #endif
- obj_aout_external_syms (abfd) = NULL;
- }
- if (obj_aout_external_strings (abfd) != NULL)
- {
- #ifdef USE_MMAP
- bfd_free_window (&obj_aout_string_window (abfd));
- #else
- free ((void *) obj_aout_external_strings (abfd));
- #endif
- obj_aout_external_strings (abfd) = NULL;
- }
- return true;
- }
- /* Given an a.out BFD, add symbols to the global hash table as
- appropriate. */
- bool
- NAME (aout, link_add_symbols) (bfd *abfd, struct bfd_link_info *info)
- {
- switch (bfd_get_format (abfd))
- {
- case bfd_object:
- return aout_link_add_object_symbols (abfd, info);
- case bfd_archive:
- return _bfd_generic_link_add_archive_symbols
- (abfd, info, aout_link_check_archive_element);
- default:
- bfd_set_error (bfd_error_wrong_format);
- return false;
- }
- }
- /* Add symbols from an a.out object file. */
- static bool
- aout_link_add_object_symbols (bfd *abfd, struct bfd_link_info *info)
- {
- if (! aout_get_external_symbols (abfd))
- return false;
- if (! aout_link_add_symbols (abfd, info))
- return false;
- if (! info->keep_memory)
- {
- if (! aout_link_free_symbols (abfd))
- return false;
- }
- return true;
- }
- /* Look through the internal symbols to see if this object file should
- be included in the link. We should include this object file if it
- defines any symbols which are currently undefined. If this object
- file defines a common symbol, then we may adjust the size of the
- known symbol but we do not include the object file in the link
- (unless there is some other reason to include it). */
- static bool
- aout_link_check_ar_symbols (bfd *abfd,
- struct bfd_link_info *info,
- bool *pneeded,
- bfd **subsbfd)
- {
- struct external_nlist *p;
- struct external_nlist *pend;
- char *strings;
- *pneeded = false;
- /* Look through all the symbols. */
- p = obj_aout_external_syms (abfd);
- pend = p + obj_aout_external_sym_count (abfd);
- strings = obj_aout_external_strings (abfd);
- for (; p < pend; p++)
- {
- int type = H_GET_8 (abfd, p->e_type);
- const char *name = strings + GET_WORD (abfd, p->e_strx);
- struct bfd_link_hash_entry *h;
- /* Ignore symbols that are not externally visible. This is an
- optimization only, as we check the type more thoroughly
- below. */
- if ((type & N_EXT) == 0
- || is_stab(type, name)
- || type == N_FN)
- continue;
- h = bfd_link_hash_lookup (info->hash, name, false, false, true);
- /* We are only interested in symbols that are currently
- undefined or common. */
- if (h == NULL
- || (h->type != bfd_link_hash_undefined
- && h->type != bfd_link_hash_common))
- continue;
- if (type == (N_TEXT | N_EXT)
- || type == (N_DATA | N_EXT)
- || type == (N_BSS | N_EXT)
- || type == (N_ABS | N_EXT))
- {
- /* This object file defines this symbol. We must link it
- in. This is true regardless of whether the current
- definition of the symbol is undefined or common. If the
- current definition is common, we have a case in which we
- have already seen an object file including
- int a;
- and this object file from the archive includes
- int a = 5;
- In such a case we must include this object file.
- FIXME: The SunOS 4.1.3 linker will pull in the archive
- element if the symbol is defined in the .data section,
- but not if it is defined in the .text section. That
- seems a bit crazy to me, and I haven't implemented it.
- However, it might be correct. */
- if (!(*info->callbacks
- ->add_archive_element) (info, abfd, name, subsbfd))
- continue;
- *pneeded = true;
- return true;
- }
- if (type == (N_UNDF | N_EXT))
- {
- bfd_vma value;
- value = GET_WORD (abfd, p->e_value);
- if (value != 0)
- {
- /* This symbol is common in the object from the archive
- file. */
- if (h->type == bfd_link_hash_undefined)
- {
- bfd *symbfd;
- unsigned int power;
- symbfd = h->u.undef.abfd;
- if (symbfd == NULL)
- {
- /* This symbol was created as undefined from
- outside BFD. We assume that we should link
- in the object file. This is done for the -u
- option in the linker. */
- if (!(*info->callbacks
- ->add_archive_element) (info, abfd, name, subsbfd))
- return false;
- *pneeded = true;
- return true;
- }
- /* Turn the current link symbol into a common
- symbol. It is already on the undefs list. */
- h->type = bfd_link_hash_common;
- h->u.c.p = bfd_hash_allocate (&info->hash->table,
- sizeof (struct bfd_link_hash_common_entry));
- if (h->u.c.p == NULL)
- return false;
- h->u.c.size = value;
- /* FIXME: This isn't quite right. The maximum
- alignment of a common symbol should be set by the
- architecture of the output file, not of the input
- file. */
- power = bfd_log2 (value);
- if (power > bfd_get_arch_info (abfd)->section_align_power)
- power = bfd_get_arch_info (abfd)->section_align_power;
- h->u.c.p->alignment_power = power;
- h->u.c.p->section = bfd_make_section_old_way (symbfd,
- "COMMON");
- }
- else
- {
- /* Adjust the size of the common symbol if
- necessary. */
- if (value > h->u.c.size)
- h->u.c.size = value;
- }
- }
- }
- }
- /* We do not need this object file. */
- return true;
- }
- /* Check a single archive element to see if we need to include it in
- the link. *PNEEDED is set according to whether this element is
- needed in the link or not. This is called from
- _bfd_generic_link_add_archive_symbols. */
- static bool
- aout_link_check_archive_element (bfd *abfd,
- struct bfd_link_info *info,
- struct bfd_link_hash_entry *h ATTRIBUTE_UNUSED,
- const char *name ATTRIBUTE_UNUSED,
- bool *pneeded)
- {
- bfd *oldbfd;
- bool needed;
- if (!aout_get_external_symbols (abfd))
- return false;
- oldbfd = abfd;
- if (!aout_link_check_ar_symbols (abfd, info, pneeded, &abfd))
- return false;
- needed = *pneeded;
- if (needed)
- {
- /* Potentially, the add_archive_element hook may have set a
- substitute BFD for us. */
- if (abfd != oldbfd)
- {
- if (!info->keep_memory
- && !aout_link_free_symbols (oldbfd))
- return false;
- if (!aout_get_external_symbols (abfd))
- return false;
- }
- if (!aout_link_add_symbols (abfd, info))
- return false;
- }
- if (!info->keep_memory || !needed)
- {
- if (!aout_link_free_symbols (abfd))
- return false;
- }
- return true;
- }
- /* Add all symbols from an object file to the hash table. */
- static bool
- aout_link_add_symbols (bfd *abfd, struct bfd_link_info *info)
- {
- bool (*add_one_symbol)
- (struct bfd_link_info *, bfd *, const char *, flagword, asection *,
- bfd_vma, const char *, bool, bool, struct bfd_link_hash_entry **);
- struct external_nlist *syms;
- bfd_size_type sym_count;
- char *strings;
- bool copy;
- struct aout_link_hash_entry **sym_hash;
- struct external_nlist *p;
- struct external_nlist *pend;
- syms = obj_aout_external_syms (abfd);
- sym_count = obj_aout_external_sym_count (abfd);
- strings = obj_aout_external_strings (abfd);
- if (info->keep_memory)
- copy = false;
- else
- copy = true;
- if (aout_backend_info (abfd)->add_dynamic_symbols != NULL)
- {
- if (! ((*aout_backend_info (abfd)->add_dynamic_symbols)
- (abfd, info, &syms, &sym_count, &strings)))
- return false;
- }
- /* We keep a list of the linker hash table entries that correspond
- to particular symbols. We could just look them up in the hash
- table, but keeping the list is more efficient. Perhaps this
- should be conditional on info->keep_memory. */
- sym_hash = bfd_alloc (abfd,
- sym_count * sizeof (struct aout_link_hash_entry *));
- if (sym_hash == NULL && sym_count != 0)
- return false;
- obj_aout_sym_hashes (abfd) = sym_hash;
- add_one_symbol = aout_backend_info (abfd)->add_one_symbol;
- if (add_one_symbol == NULL)
- add_one_symbol = _bfd_generic_link_add_one_symbol;
- p = syms;
- pend = p + sym_count;
- for (; p < pend; p++, sym_hash++)
- {
- int type;
- const char *name;
- bfd_vma value;
- asection *section;
- flagword flags;
- const char *string;
- *sym_hash = NULL;
- type = H_GET_8 (abfd, p->e_type);
- /* PR 19629: Corrupt binaries can contain illegal string offsets. */
- if (GET_WORD (abfd, p->e_strx) >= obj_aout_external_string_size (abfd))
- return false;
- name = strings + GET_WORD (abfd, p->e_strx);
- /* Ignore debugging symbols. */
- if (is_stab (type, name))
- continue;
- value = GET_WORD (abfd, p->e_value);
- flags = BSF_GLOBAL;
- string = NULL;
- switch (type)
- {
- default:
- /* Shouldn't be any types not covered. */
- BFD_ASSERT (0);
- continue;
- case N_UNDF:
- case N_ABS:
- case N_TEXT:
- case N_DATA:
- case N_BSS:
- case N_REG:
- case N_FN:
- /* Ignore symbols that are not externally visible. */
- continue;
- case N_UNDF | N_EXT:
- if (value == 0)
- {
- section = bfd_und_section_ptr;
- flags = 0;
- }
- else
- section = bfd_com_section_ptr;
- break;
- case N_ABS | N_EXT:
- section = bfd_abs_section_ptr;
- break;
- case N_TEXT | N_EXT:
- section = obj_textsec (abfd);
- value -= bfd_section_vma (section);
- break;
- case N_DATA | N_EXT:
- /* Treat N_SETV symbols as N_DATA symbol; see comment in
- translate_from_native_sym_flags. */
- section = obj_datasec (abfd);
- value -= bfd_section_vma (section);
- break;
- case N_BSS | N_EXT:
- section = obj_bsssec (abfd);
- value -= bfd_section_vma (section);
- break;
- }
- if (! ((*add_one_symbol)
- (info, abfd, name, flags, section, value, string, copy, false,
- (struct bfd_link_hash_entry **) sym_hash)))
- return false;
- /* Restrict the maximum alignment of a common symbol based on
- the architecture, since a.out has no way to represent
- alignment requirements of a section in a .o file. FIXME:
- This isn't quite right: it should use the architecture of the
- output file, not the input files. */
- if ((*sym_hash)->root.type == bfd_link_hash_common
- && ((*sym_hash)->root.u.c.p->alignment_power >
- bfd_get_arch_info (abfd)->section_align_power))
- (*sym_hash)->root.u.c.p->alignment_power =
- bfd_get_arch_info (abfd)->section_align_power;
- /* If this is a set symbol, and we are not building sets, then
- it is possible for the hash entry to not have been set. In
- such a case, treat the symbol as not globally defined. */
- if ((*sym_hash)->root.type == bfd_link_hash_new)
- {
- BFD_ASSERT ((flags & BSF_CONSTRUCTOR) != 0);
- *sym_hash = NULL;
- }
- }
- return true;
- }
- /* Look up an entry in an the header file hash table. */
- #define aout_link_includes_lookup(table, string, create, copy) \
- ((struct aout_link_includes_entry *) \
- bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
- /* The function to create a new entry in the header file hash table. */
- static struct bfd_hash_entry *
- aout_link_includes_newfunc (struct bfd_hash_entry *entry,
- struct bfd_hash_table *table,
- const char *string)
- {
- struct aout_link_includes_entry * ret =
- (struct aout_link_includes_entry *) entry;
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (ret == NULL)
- ret = bfd_hash_allocate (table,
- sizeof (struct aout_link_includes_entry));
- if (ret == NULL)
- return NULL;
- /* Call the allocation method of the superclass. */
- ret = ((struct aout_link_includes_entry *)
- bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
- if (ret)
- /* Set local fields. */
- ret->totals = NULL;
- return (struct bfd_hash_entry *) ret;
- }
- /* Write out a symbol that was not associated with an a.out input
- object. */
- static bool
- aout_link_write_other_symbol (struct bfd_hash_entry *bh, void *data)
- {
- struct aout_link_hash_entry *h = (struct aout_link_hash_entry *) bh;
- struct aout_final_link_info *flaginfo = (struct aout_final_link_info *) data;
- bfd *output_bfd;
- int type;
- bfd_vma val;
- struct external_nlist outsym;
- bfd_size_type indx;
- size_t amt;
- if (h->root.type == bfd_link_hash_warning)
- {
- h = (struct aout_link_hash_entry *) h->root.u.i.link;
- if (h->root.type == bfd_link_hash_new)
- return true;
- }
- output_bfd = flaginfo->output_bfd;
- if (aout_backend_info (output_bfd)->write_dynamic_symbol != NULL)
- {
- if (! ((*aout_backend_info (output_bfd)->write_dynamic_symbol)
- (output_bfd, flaginfo->info, h)))
- {
- /* FIXME: No way to handle errors. */
- abort ();
- }
- }
- if (h->written)
- return true;
- h->written = true;
- /* An indx of -2 means the symbol must be written. */
- if (h->indx != -2
- && (flaginfo->info->strip == strip_all
- || (flaginfo->info->strip == strip_some
- && bfd_hash_lookup (flaginfo->info->keep_hash, h->root.root.string,
- false, false) == NULL)))
- return true;
- switch (h->root.type)
- {
- default:
- abort ();
- /* Avoid variable not initialized warnings. */
- return true;
- case bfd_link_hash_new:
- /* This can happen for set symbols when sets are not being
- built. */
- return true;
- case bfd_link_hash_undefined:
- type = N_UNDF | N_EXT;
- val = 0;
- break;
- case bfd_link_hash_defined:
- case bfd_link_hash_defweak:
- {
- asection *sec;
- sec = h->root.u.def.section->output_section;
- BFD_ASSERT (bfd_is_abs_section (sec)
- || sec->owner == output_bfd);
- if (sec == obj_textsec (output_bfd))
- type = h->root.type == bfd_link_hash_defined ? N_TEXT : N_WEAKT;
- else if (sec == obj_datasec (output_bfd))
- type = h->root.type == bfd_link_hash_defined ? N_DATA : N_WEAKD;
- else if (sec == obj_bsssec (output_bfd))
- type = h->root.type == bfd_link_hash_defined ? N_BSS : N_WEAKB;
- else
- type = h->root.type == bfd_link_hash_defined ? N_ABS : N_WEAKA;
- type |= N_EXT;
- val = (h->root.u.def.value
- + sec->vma
- + h->root.u.def.section->output_offset);
- }
- break;
- case bfd_link_hash_common:
- type = N_UNDF | N_EXT;
- val = h->root.u.c.size;
- break;
- case bfd_link_hash_undefweak:
- type = N_WEAKU;
- val = 0;
- /* Fall through. */
- case bfd_link_hash_indirect:
- case bfd_link_hash_warning:
- /* FIXME: Ignore these for now. The circumstances under which
- they should be written out are not clear to me. */
- return true;
- }
- H_PUT_8 (output_bfd, type, outsym.e_type);
- H_PUT_8 (output_bfd, 0, outsym.e_ovly);
- indx = add_to_stringtab (output_bfd, flaginfo->strtab, h->root.root.string,
- false);
- if (indx == (bfd_size_type) -1)
- /* FIXME: No way to handle errors. */
- abort ();
- PUT_WORD (output_bfd, 0, outsym.e_desc);
- PUT_WORD (output_bfd, indx, outsym.e_strx);
- PUT_WORD (output_bfd, val, outsym.e_value);
- amt = EXTERNAL_NLIST_SIZE;
- if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0
- || bfd_bwrite ((void *) &outsym, amt, output_bfd) != amt)
- /* FIXME: No way to handle errors. */
- abort ();
- flaginfo->symoff += amt;
- h->indx = obj_aout_external_sym_count (output_bfd);
- ++obj_aout_external_sym_count (output_bfd);
- return true;
- }
- /* Handle a link order which is supposed to generate a reloc. */
- static bool
- aout_link_reloc_link_order (struct aout_final_link_info *flaginfo,
- asection *o,
- struct bfd_link_order *p)
- {
- struct bfd_link_order_reloc *pr;
- int r_index;
- int r_extern;
- reloc_howto_type *howto;
- file_ptr *reloff_ptr;
- struct reloc_std_external srel;
- void * rel_ptr;
- bfd_size_type rel_size;
- pr = p->u.reloc.p;
- if (p->type == bfd_section_reloc_link_order)
- {
- r_extern = 0;
- if (bfd_is_abs_section (pr->u.section))
- r_index = N_ABS | N_EXT;
- else
- {
- BFD_ASSERT (pr->u.section->owner == flaginfo->output_bfd);
- r_index = pr->u.section->target_index;
- }
- }
- else
- {
- struct aout_link_hash_entry *h;
- BFD_ASSERT (p->type == bfd_symbol_reloc_link_order);
- r_extern = 1;
- h = ((struct aout_link_hash_entry *)
- bfd_wrapped_link_hash_lookup (flaginfo->output_bfd, flaginfo->info,
- pr->u.name, false, false, true));
- if (h != NULL
- && h->indx >= 0)
- r_index = h->indx;
- else if (h != NULL)
- {
- /* We decided to strip this symbol, but it turns out that we
- can't. Note that we lose the other and desc information
- here. I don't think that will ever matter for a global
- symbol. */
- h->indx = -2;
- h->written = false;
- if (!aout_link_write_other_symbol (&h->root.root, flaginfo))
- return false;
- r_index = h->indx;
- }
- else
- {
- (*flaginfo->info->callbacks->unattached_reloc)
- (flaginfo->info, pr->u.name, NULL, NULL, (bfd_vma) 0);
- r_index = 0;
- }
- }
- howto = bfd_reloc_type_lookup (flaginfo->output_bfd, pr->reloc);
- if (howto == 0)
- {
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- if (o == obj_textsec (flaginfo->output_bfd))
- reloff_ptr = &flaginfo->treloff;
- else if (o == obj_datasec (flaginfo->output_bfd))
- reloff_ptr = &flaginfo->dreloff;
- else
- abort ();
- #ifdef MY_put_reloc
- MY_put_reloc(flaginfo->output_bfd, r_extern, r_index, p->offset, howto,
- &srel);
- #else
- {
- int r_pcrel;
- int r_baserel;
- int r_jmptable;
- int r_relative;
- int r_length;
- fprintf (stderr, "TODO: line %d in bfd/pdp11.c\n", __LINE__);
- r_pcrel = howto->pc_relative;
- r_baserel = (howto->type & 8) != 0;
- r_jmptable = (howto->type & 16) != 0;
- r_relative = (howto->type & 32) != 0;
- r_length = howto->size;
- PUT_WORD (flaginfo->output_bfd, p->offset, srel.r_address);
- if (bfd_header_big_endian (flaginfo->output_bfd))
- {
- srel.r_index[0] = r_index >> 16;
- srel.r_index[1] = r_index >> 8;
- srel.r_index[2] = r_index;
- srel.r_type[0] =
- ((r_extern ? RELOC_STD_BITS_EXTERN_BIG : 0)
- | (r_pcrel ? RELOC_STD_BITS_PCREL_BIG : 0)
- | (r_baserel ? RELOC_STD_BITS_BASEREL_BIG : 0)
- | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_BIG : 0)
- | (r_relative ? RELOC_STD_BITS_RELATIVE_BIG : 0)
- | (r_length << RELOC_STD_BITS_LENGTH_SH_BIG));
- }
- else
- {
- srel.r_index[2] = r_index >> 16;
- srel.r_index[1] = r_index >> 8;
- srel.r_index[0] = r_index;
- srel.r_type[0] =
- ((r_extern ? RELOC_STD_BITS_EXTERN_LITTLE : 0)
- | (r_pcrel ? RELOC_STD_BITS_PCREL_LITTLE : 0)
- | (r_baserel ? RELOC_STD_BITS_BASEREL_LITTLE : 0)
- | (r_jmptable ? RELOC_STD_BITS_JMPTABLE_LITTLE : 0)
- | (r_relative ? RELOC_STD_BITS_RELATIVE_LITTLE : 0)
- | (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE));
- }
- }
- #endif
- rel_ptr = (void *) &srel;
- /* We have to write the addend into the object file, since
- standard a.out relocs are in place. It would be more
- reliable if we had the current contents of the file here,
- rather than assuming zeroes, but we can't read the file since
- it was opened using bfd_openw. */
- if (pr->addend != 0)
- {
- bfd_size_type size;
- bfd_reloc_status_type r;
- bfd_byte *buf;
- bool ok;
- size = bfd_get_reloc_size (howto);
- buf = bfd_zmalloc (size);
- if (buf == NULL && size != 0)
- return false;
- r = MY_relocate_contents (howto, flaginfo->output_bfd,
- pr->addend, buf);
- switch (r)
- {
- case bfd_reloc_ok:
- break;
- default:
- case bfd_reloc_outofrange:
- abort ();
- case bfd_reloc_overflow:
- (*flaginfo->info->callbacks->reloc_overflow)
- (flaginfo->info, NULL,
- (p->type == bfd_section_reloc_link_order
- ? bfd_section_name (pr->u.section)
- : pr->u.name),
- howto->name, pr->addend, NULL,
- (asection *) NULL, (bfd_vma) 0);
- break;
- }
- ok = bfd_set_section_contents (flaginfo->output_bfd, o,
- (void *) buf,
- (file_ptr) p->offset,
- size);
- free (buf);
- if (! ok)
- return false;
- }
- rel_size = obj_reloc_entry_size (flaginfo->output_bfd);
- if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0
- || bfd_bwrite (rel_ptr, rel_size, flaginfo->output_bfd) != rel_size)
- return false;
- *reloff_ptr += rel_size;
- /* Assert that the relocs have not run into the symbols, and that n
- the text relocs have not run into the data relocs. */
- BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
- && (reloff_ptr != &flaginfo->treloff
- || (*reloff_ptr
- <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
- return true;
- }
- /* Get the section corresponding to a reloc index. */
- static inline asection *
- aout_reloc_type_to_section (bfd *abfd, int type)
- {
- switch (type)
- {
- case RTEXT: return obj_textsec (abfd);
- case RDATA: return obj_datasec (abfd);
- case RBSS: return obj_bsssec (abfd);
- case RABS: return bfd_abs_section_ptr;
- case REXT: return bfd_und_section_ptr;
- default: abort ();
- }
- }
- static bool
- pdp11_aout_link_input_section (struct aout_final_link_info *flaginfo,
- bfd *input_bfd,
- asection *input_section,
- bfd_byte *relocs,
- bfd_size_type rel_size,
- bfd_byte *contents)
- {
- bool (*check_dynamic_reloc)
- (struct bfd_link_info *, bfd *, asection *,
- struct aout_link_hash_entry *, void *, bfd_byte *, bool *, bfd_vma *);
- bfd *output_bfd;
- bool relocatable;
- struct external_nlist *syms;
- char *strings;
- struct aout_link_hash_entry **sym_hashes;
- int *symbol_map;
- bfd_byte *rel;
- bfd_byte *rel_end;
- output_bfd = flaginfo->output_bfd;
- check_dynamic_reloc = aout_backend_info (output_bfd)->check_dynamic_reloc;
- BFD_ASSERT (obj_reloc_entry_size (input_bfd) == RELOC_SIZE);
- BFD_ASSERT (input_bfd->xvec->header_byteorder
- == output_bfd->xvec->header_byteorder);
- relocatable = bfd_link_relocatable (flaginfo->info);
- syms = obj_aout_external_syms (input_bfd);
- strings = obj_aout_external_strings (input_bfd);
- sym_hashes = obj_aout_sym_hashes (input_bfd);
- symbol_map = flaginfo->symbol_map;
- rel = relocs;
- rel_end = rel + rel_size;
- for (; rel < rel_end; rel += RELOC_SIZE)
- {
- bfd_vma r_addr;
- int r_index;
- int r_type;
- int r_pcrel;
- int r_extern;
- reloc_howto_type *howto;
- struct aout_link_hash_entry *h = NULL;
- bfd_vma relocation;
- bfd_reloc_status_type r;
- int reloc_entry;
- reloc_entry = GET_WORD (input_bfd, (void *) rel);
- if (reloc_entry == 0)
- continue;
- {
- unsigned int howto_idx;
- r_index = (reloc_entry & RIDXMASK) >> 4;
- r_type = reloc_entry & RTYPE;
- r_pcrel = reloc_entry & RELFLG;
- r_addr = (char *) rel - (char *) relocs;
- r_extern = (r_type == REXT);
- howto_idx = r_pcrel;
- if (howto_idx < TABLE_SIZE (howto_table_pdp11))
- howto = howto_table_pdp11 + howto_idx;
- else
- {
- _bfd_error_handler (_("%pB: unsupported relocation type"),
- input_bfd);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- }
- if (relocatable)
- {
- /* We are generating a relocatable output file, and must
- modify the reloc accordingly. */
- if (r_extern)
- {
- /* If we know the symbol this relocation is against,
- convert it into a relocation against a section. This
- is what the native linker does. */
- h = sym_hashes[r_index];
- if (h != NULL
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak))
- {
- asection *output_section;
- /* Compute a new r_index. */
- output_section = h->root.u.def.section->output_section;
- if (output_section == obj_textsec (output_bfd))
- r_type = N_TEXT;
- else if (output_section == obj_datasec (output_bfd))
- r_type = N_DATA;
- else if (output_section == obj_bsssec (output_bfd))
- r_type = N_BSS;
- else
- r_type = N_ABS;
- /* Add the symbol value and the section VMA to the
- addend stored in the contents. */
- relocation = (h->root.u.def.value
- + output_section->vma
- + h->root.u.def.section->output_offset);
- }
- else
- {
- /* We must change r_index according to the symbol
- map. */
- r_index = symbol_map[r_index];
- if (r_index == -1)
- {
- if (h != NULL)
- {
- /* We decided to strip this symbol, but it
- turns out that we can't. Note that we
- lose the other and desc information here.
- I don't think that will ever matter for a
- global symbol. */
- if (h->indx < 0)
- {
- h->indx = -2;
- h->written = false;
- if (!aout_link_write_other_symbol (&h->root.root,
- flaginfo))
- return false;
- }
- r_index = h->indx;
- }
- else
- {
- const char *name;
- name = strings + GET_WORD (input_bfd,
- syms[r_index].e_strx);
- (*flaginfo->info->callbacks->unattached_reloc)
- (flaginfo->info, name, input_bfd, input_section,
- r_addr);
- r_index = 0;
- }
- }
- relocation = 0;
- }
- /* Write out the new r_index value. */
- reloc_entry = GET_WORD (input_bfd, rel);
- reloc_entry &= RIDXMASK;
- reloc_entry |= r_index << 4;
- PUT_WORD (input_bfd, reloc_entry, rel);
- }
- else
- {
- asection *section;
- /* This is a relocation against a section. We must
- adjust by the amount that the section moved. */
- section = aout_reloc_type_to_section (input_bfd, r_type);
- relocation = (section->output_section->vma
- + section->output_offset
- - section->vma);
- }
- /* Change the address of the relocation. */
- fprintf (stderr, "TODO: change the address of the relocation\n");
- /* Adjust a PC relative relocation by removing the reference
- to the original address in the section and including the
- reference to the new address. */
- if (r_pcrel)
- relocation -= (input_section->output_section->vma
- + input_section->output_offset
- - input_section->vma);
- #ifdef MY_relocatable_reloc
- MY_relocatable_reloc (howto, output_bfd, rel, relocation, r_addr);
- #endif
- if (relocation == 0)
- r = bfd_reloc_ok;
- else
- r = MY_relocate_contents (howto,
- input_bfd, relocation,
- contents + r_addr);
- }
- else
- {
- bool hundef;
- /* We are generating an executable, and must do a full
- relocation. */
- hundef = false;
- if (r_extern)
- {
- h = sym_hashes[r_index];
- if (h != NULL
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak))
- {
- relocation = (h->root.u.def.value
- + h->root.u.def.section->output_section->vma
- + h->root.u.def.section->output_offset);
- }
- else if (h != NULL
- && h->root.type == bfd_link_hash_undefweak)
- relocation = 0;
- else
- {
- hundef = true;
- relocation = 0;
- }
- }
- else
- {
- asection *section;
- section = aout_reloc_type_to_section (input_bfd, r_type);
- relocation = (section->output_section->vma
- + section->output_offset
- - section->vma);
- if (r_pcrel)
- relocation += input_section->vma;
- }
- if (check_dynamic_reloc != NULL)
- {
- bool skip;
- if (! ((*check_dynamic_reloc)
- (flaginfo->info, input_bfd, input_section, h,
- (void *) rel, contents, &skip, &relocation)))
- return false;
- if (skip)
- continue;
- }
- /* Now warn if a global symbol is undefined. We could not
- do this earlier, because check_dynamic_reloc might want
- to skip this reloc. */
- if (hundef && ! bfd_link_pic (flaginfo->info))
- {
- const char *name;
- if (h != NULL)
- name = h->root.root.string;
- else
- name = strings + GET_WORD (input_bfd, syms[r_index].e_strx);
- (*flaginfo->info->callbacks->undefined_symbol)
- (flaginfo->info, name, input_bfd, input_section,
- r_addr, true);
- }
- r = MY_final_link_relocate (howto,
- input_bfd, input_section,
- contents, r_addr, relocation,
- (bfd_vma) 0);
- }
- if (r != bfd_reloc_ok)
- {
- switch (r)
- {
- default:
- case bfd_reloc_outofrange:
- abort ();
- case bfd_reloc_overflow:
- {
- const char *name;
- if (h != NULL)
- name = NULL;
- else if (r_extern)
- name = strings + GET_WORD (input_bfd,
- syms[r_index].e_strx);
- else
- {
- asection *s;
- s = aout_reloc_type_to_section (input_bfd, r_type);
- name = bfd_section_name (s);
- }
- (*flaginfo->info->callbacks->reloc_overflow)
- (flaginfo->info, (h ? &h->root : NULL), name, howto->name,
- (bfd_vma) 0, input_bfd, input_section, r_addr);
- }
- break;
- }
- }
- }
- return true;
- }
- /* Link an a.out section into the output file. */
- static bool
- aout_link_input_section (struct aout_final_link_info *flaginfo,
- bfd *input_bfd,
- asection *input_section,
- file_ptr *reloff_ptr,
- bfd_size_type rel_size)
- {
- bfd_size_type input_size;
- void * relocs;
- /* Get the section contents. */
- input_size = input_section->size;
- if (! bfd_get_section_contents (input_bfd, input_section,
- (void *) flaginfo->contents,
- (file_ptr) 0, input_size))
- return false;
- /* Read in the relocs if we haven't already done it. */
- if (aout_section_data (input_section) != NULL
- && aout_section_data (input_section)->relocs != NULL)
- relocs = aout_section_data (input_section)->relocs;
- else
- {
- relocs = flaginfo->relocs;
- if (rel_size > 0)
- {
- if (bfd_seek (input_bfd, input_section->rel_filepos, SEEK_SET) != 0
- || bfd_bread (relocs, rel_size, input_bfd) != rel_size)
- return false;
- }
- }
- /* Relocate the section contents. */
- if (! pdp11_aout_link_input_section (flaginfo, input_bfd, input_section,
- (bfd_byte *) relocs,
- rel_size, flaginfo->contents))
- return false;
- /* Write out the section contents. */
- if (! bfd_set_section_contents (flaginfo->output_bfd,
- input_section->output_section,
- (void *) flaginfo->contents,
- (file_ptr) input_section->output_offset,
- input_size))
- return false;
- /* If we are producing relocatable output, the relocs were
- modified, and we now write them out. */
- if (bfd_link_relocatable (flaginfo->info) && rel_size > 0)
- {
- if (bfd_seek (flaginfo->output_bfd, *reloff_ptr, SEEK_SET) != 0)
- return false;
- if (bfd_bwrite (relocs, rel_size, flaginfo->output_bfd) != rel_size)
- return false;
- *reloff_ptr += rel_size;
- /* Assert that the relocs have not run into the symbols, and
- that if these are the text relocs they have not run into the
- data relocs. */
- BFD_ASSERT (*reloff_ptr <= obj_sym_filepos (flaginfo->output_bfd)
- && (reloff_ptr != &flaginfo->treloff
- || (*reloff_ptr
- <= obj_datasec (flaginfo->output_bfd)->rel_filepos)));
- }
- return true;
- }
- /* Link an a.out input BFD into the output file. */
- static bool
- aout_link_input_bfd (struct aout_final_link_info *flaginfo, bfd *input_bfd)
- {
- BFD_ASSERT (bfd_get_format (input_bfd) == bfd_object);
- /* If this is a dynamic object, it may need special handling. */
- if ((input_bfd->flags & DYNAMIC) != 0
- && aout_backend_info (input_bfd)->link_dynamic_object != NULL)
- return ((*aout_backend_info (input_bfd)->link_dynamic_object)
- (flaginfo->info, input_bfd));
- /* Get the symbols. We probably have them already, unless
- flaginfo->info->keep_memory is FALSE. */
- if (! aout_get_external_symbols (input_bfd))
- return false;
- /* Write out the symbols and get a map of the new indices. The map
- is placed into flaginfo->symbol_map. */
- if (! aout_link_write_symbols (flaginfo, input_bfd))
- return false;
- /* Relocate and write out the sections. These functions use the
- symbol map created by aout_link_write_symbols. The linker_mark
- field will be set if these sections are to be included in the
- link, which will normally be the case. */
- if (obj_textsec (input_bfd)->linker_mark)
- {
- if (! aout_link_input_section (flaginfo, input_bfd,
- obj_textsec (input_bfd),
- &flaginfo->treloff,
- exec_hdr (input_bfd)->a_trsize))
- return false;
- }
- if (obj_datasec (input_bfd)->linker_mark)
- {
- if (! aout_link_input_section (flaginfo, input_bfd,
- obj_datasec (input_bfd),
- &flaginfo->dreloff,
- exec_hdr (input_bfd)->a_drsize))
- return false;
- }
- /* If we are not keeping memory, we don't need the symbols any
- longer. We still need them if we are keeping memory, because the
- strings in the hash table point into them. */
- if (! flaginfo->info->keep_memory)
- {
- if (! aout_link_free_symbols (input_bfd))
- return false;
- }
- return true;
- }
- /* Do the final link step. This is called on the output BFD. The
- INFO structure should point to a list of BFDs linked through the
- link.next field which can be used to find each BFD which takes part
- in the output. Also, each section in ABFD should point to a list
- of bfd_link_order structures which list all the input sections for
- the output section. */
- bool
- NAME (aout, final_link) (bfd *abfd,
- struct bfd_link_info *info,
- void (*callback) (bfd *, file_ptr *, file_ptr *, file_ptr *))
- {
- struct aout_final_link_info aout_info;
- bool includes_hash_initialized = false;
- bfd *sub;
- bfd_size_type trsize, drsize;
- bfd_size_type max_contents_size;
- bfd_size_type max_relocs_size;
- bfd_size_type max_sym_count;
- struct bfd_link_order *p;
- asection *o;
- bool have_link_order_relocs;
- if (bfd_link_pic (info))
- abfd->flags |= DYNAMIC;
- separate_i_d = info->separate_code;
- aout_info.info = info;
- aout_info.output_bfd = abfd;
- aout_info.contents = NULL;
- aout_info.relocs = NULL;
- aout_info.symbol_map = NULL;
- aout_info.output_syms = NULL;
- if (!bfd_hash_table_init_n (&aout_info.includes.root,
- aout_link_includes_newfunc,
- sizeof (struct aout_link_includes_entry),
- 251))
- goto error_return;
- includes_hash_initialized = true;
- /* Figure out the largest section size. Also, if generating
- relocatable output, count the relocs. */
- trsize = 0;
- drsize = 0;
- max_contents_size = 0;
- max_relocs_size = 0;
- max_sym_count = 0;
- for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
- {
- size_t sz;
- if (bfd_link_relocatable (info))
- {
- if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
- {
- trsize += exec_hdr (sub)->a_trsize;
- drsize += exec_hdr (sub)->a_drsize;
- }
- else
- {
- /* FIXME: We need to identify the .text and .data sections
- and call get_reloc_upper_bound and canonicalize_reloc to
- work out the number of relocs needed, and then multiply
- by the reloc size. */
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: relocatable link from %s to %s not supported"),
- abfd, sub->xvec->name, abfd->xvec->name);
- bfd_set_error (bfd_error_invalid_operation);
- goto error_return;
- }
- }
- if (bfd_get_flavour (sub) == bfd_target_aout_flavour)
- {
- sz = obj_textsec (sub)->size;
- if (sz > max_contents_size)
- max_contents_size = sz;
- sz = obj_datasec (sub)->size;
- if (sz > max_contents_size)
- max_contents_size = sz;
- sz = exec_hdr (sub)->a_trsize;
- if (sz > max_relocs_size)
- max_relocs_size = sz;
- sz = exec_hdr (sub)->a_drsize;
- if (sz > max_relocs_size)
- max_relocs_size = sz;
- sz = obj_aout_external_sym_count (sub);
- if (sz > max_sym_count)
- max_sym_count = sz;
- }
- }
- if (bfd_link_relocatable (info))
- {
- if (obj_textsec (abfd) != NULL)
- trsize += (_bfd_count_link_order_relocs (obj_textsec (abfd)
- ->map_head.link_order)
- * obj_reloc_entry_size (abfd));
- if (obj_datasec (abfd) != NULL)
- drsize += (_bfd_count_link_order_relocs (obj_datasec (abfd)
- ->map_head.link_order)
- * obj_reloc_entry_size (abfd));
- }
- exec_hdr (abfd)->a_trsize = trsize;
- exec_hdr (abfd)->a_drsize = drsize;
- exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
- /* Adjust the section sizes and vmas according to the magic number.
- This sets a_text, a_data and a_bss in the exec_hdr and sets the
- filepos for each section. */
- if (! NAME (aout, adjust_sizes_and_vmas) (abfd))
- goto error_return;
- /* The relocation and symbol file positions differ among a.out
- targets. We are passed a callback routine from the backend
- specific code to handle this.
- FIXME: At this point we do not know how much space the symbol
- table will require. This will not work for any (nonstandard)
- a.out target that needs to know the symbol table size before it
- can compute the relocation file positions. */
- (*callback) (abfd, &aout_info.treloff, &aout_info.dreloff,
- &aout_info.symoff);
- obj_textsec (abfd)->rel_filepos = aout_info.treloff;
- obj_datasec (abfd)->rel_filepos = aout_info.dreloff;
- obj_sym_filepos (abfd) = aout_info.symoff;
- /* We keep a count of the symbols as we output them. */
- obj_aout_external_sym_count (abfd) = 0;
- /* We accumulate the string table as we write out the symbols. */
- aout_info.strtab = _bfd_stringtab_init ();
- if (aout_info.strtab == NULL)
- goto error_return;
- /* Allocate buffers to hold section contents and relocs. */
- aout_info.contents = bfd_malloc (max_contents_size);
- aout_info.relocs = bfd_malloc (max_relocs_size);
- aout_info.symbol_map = bfd_malloc (max_sym_count * sizeof (int *));
- aout_info.output_syms = bfd_malloc ((max_sym_count + 1)
- * sizeof (struct external_nlist));
- if ((aout_info.contents == NULL && max_contents_size != 0)
- || (aout_info.relocs == NULL && max_relocs_size != 0)
- || (aout_info.symbol_map == NULL && max_sym_count != 0)
- || aout_info.output_syms == NULL)
- goto error_return;
- /* If we have a symbol named __DYNAMIC, force it out now. This is
- required by SunOS. Doing this here rather than in sunos.c is a
- hack, but it's easier than exporting everything which would be
- needed. */
- {
- struct aout_link_hash_entry *h;
- h = aout_link_hash_lookup (aout_hash_table (info), "__DYNAMIC",
- false, false, false);
- if (h != NULL)
- aout_link_write_other_symbol (&h->root.root, &aout_info);
- }
- /* The most time efficient way to do the link would be to read all
- the input object files into memory and then sort out the
- information into the output file. Unfortunately, that will
- probably use too much memory. Another method would be to step
- through everything that composes the text section and write it
- out, and then everything that composes the data section and write
- it out, and then write out the relocs, and then write out the
- symbols. Unfortunately, that requires reading stuff from each
- input file several times, and we will not be able to keep all the
- input files open simultaneously, and reopening them will be slow.
- What we do is basically process one input file at a time. We do
- everything we need to do with an input file once--copy over the
- section contents, handle the relocation information, and write
- out the symbols--and then we throw away the information we read
- from it. This approach requires a lot of lseeks of the output
- file, which is unfortunate but still faster than reopening a lot
- of files.
- We use the output_has_begun field of the input BFDs to see
- whether we have already handled it. */
- for (sub = info->input_bfds; sub != NULL; sub = sub->link.next)
- sub->output_has_begun = false;
- /* Mark all sections which are to be included in the link. This
- will normally be every section. We need to do this so that we
- can identify any sections which the linker has decided to not
- include. */
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- for (p = o->map_head.link_order; p != NULL; p = p->next)
- if (p->type == bfd_indirect_link_order)
- p->u.indirect.section->linker_mark = true;
- }
- have_link_order_relocs = false;
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- for (p = o->map_head.link_order;
- p != NULL;
- p = p->next)
- {
- if (p->type == bfd_indirect_link_order
- && (bfd_get_flavour (p->u.indirect.section->owner)
- == bfd_target_aout_flavour))
- {
- bfd *input_bfd;
- input_bfd = p->u.indirect.section->owner;
- if (! input_bfd->output_has_begun)
- {
- if (! aout_link_input_bfd (&aout_info, input_bfd))
- goto error_return;
- input_bfd->output_has_begun = true;
- }
- }
- else if (p->type == bfd_section_reloc_link_order
- || p->type == bfd_symbol_reloc_link_order)
- /* These are handled below. */
- have_link_order_relocs = true;
- else
- {
- if (! _bfd_default_link_order (abfd, info, o, p))
- goto error_return;
- }
- }
- }
- /* Write out any symbols that we have not already written out. */
- bfd_hash_traverse (&info->hash->table,
- aout_link_write_other_symbol,
- &aout_info);
- /* Now handle any relocs we were asked to create by the linker.
- These did not come from any input file. We must do these after
- we have written out all the symbols, so that we know the symbol
- indices to use. */
- if (have_link_order_relocs)
- {
- for (o = abfd->sections; o != NULL; o = o->next)
- {
- for (p = o->map_head.link_order;
- p != NULL;
- p = p->next)
- {
- if (p->type == bfd_section_reloc_link_order
- || p->type == bfd_symbol_reloc_link_order)
- {
- if (! aout_link_reloc_link_order (&aout_info, o, p))
- goto error_return;
- }
- }
- }
- }
- free (aout_info.contents);
- aout_info.contents = NULL;
- free (aout_info.relocs);
- aout_info.relocs = NULL;
- free (aout_info.symbol_map);
- aout_info.symbol_map = NULL;
- free (aout_info.output_syms);
- aout_info.output_syms = NULL;
- if (includes_hash_initialized)
- {
- bfd_hash_table_free (&aout_info.includes.root);
- includes_hash_initialized = false;
- }
- /* Finish up any dynamic linking we may be doing. */
- if (aout_backend_info (abfd)->finish_dynamic_link != NULL)
- {
- if (! (*aout_backend_info (abfd)->finish_dynamic_link) (abfd, info))
- goto error_return;
- }
- /* Update the header information. */
- abfd->symcount = obj_aout_external_sym_count (abfd);
- exec_hdr (abfd)->a_syms = abfd->symcount * EXTERNAL_NLIST_SIZE;
- obj_str_filepos (abfd) = obj_sym_filepos (abfd) + exec_hdr (abfd)->a_syms;
- obj_textsec (abfd)->reloc_count =
- exec_hdr (abfd)->a_trsize / obj_reloc_entry_size (abfd);
- obj_datasec (abfd)->reloc_count =
- exec_hdr (abfd)->a_drsize / obj_reloc_entry_size (abfd);
- /* Write out the string table, unless there are no symbols. */
- if (abfd->symcount > 0)
- {
- if (bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET) != 0
- || ! emit_stringtab (abfd, aout_info.strtab))
- goto error_return;
- }
- else if (obj_textsec (abfd)->reloc_count == 0
- && obj_datasec (abfd)->reloc_count == 0)
- {
- /* The layout of a typical a.out file is header, text, data,
- relocs, symbols, string table. When there are no relocs,
- symbols or string table, the last thing in the file is data
- and a_data may be rounded up. However we may have a smaller
- sized .data section and thus not written final padding. The
- same thing can happen with text if there is no data. Write
- final padding here to extend the file. */
- file_ptr pos = 0;
- if (exec_hdr (abfd)->a_data > obj_datasec (abfd)->size)
- pos = obj_datasec (abfd)->filepos + exec_hdr (abfd)->a_data;
- else if (obj_datasec (abfd)->size == 0
- && exec_hdr (abfd)->a_text > obj_textsec (abfd)->size)
- pos = obj_textsec (abfd)->filepos + exec_hdr (abfd)->a_text;
- if (pos != 0)
- {
- bfd_byte b = 0;
- if (bfd_seek (abfd, pos - 1, SEEK_SET) != 0
- || bfd_bwrite (&b, (bfd_size_type) 1, abfd) != 1)
- goto error_return;
- }
- }
- return true;
- error_return:
- free (aout_info.contents);
- free (aout_info.relocs);
- free (aout_info.symbol_map);
- free (aout_info.output_syms);
- if (includes_hash_initialized)
- bfd_hash_table_free (&aout_info.includes.root);
- return false;
- }
- /* Adjust and write out the symbols for an a.out file. Set the new
- symbol indices into a symbol_map. */
- static bool
- aout_link_write_symbols (struct aout_final_link_info *flaginfo, bfd *input_bfd)
- {
- bfd *output_bfd;
- bfd_size_type sym_count;
- char *strings;
- enum bfd_link_strip strip;
- enum bfd_link_discard discard;
- struct external_nlist *outsym;
- bfd_size_type strtab_index;
- struct external_nlist *sym;
- struct external_nlist *sym_end;
- struct aout_link_hash_entry **sym_hash;
- int *symbol_map;
- bool pass;
- bool skip_next;
- output_bfd = flaginfo->output_bfd;
- sym_count = obj_aout_external_sym_count (input_bfd);
- strings = obj_aout_external_strings (input_bfd);
- strip = flaginfo->info->strip;
- discard = flaginfo->info->discard;
- outsym = flaginfo->output_syms;
- /* First write out a symbol for this object file, unless we are
- discarding such symbols. */
- if (strip != strip_all
- && (strip != strip_some
- || bfd_hash_lookup (flaginfo->info->keep_hash,
- bfd_get_filename (input_bfd),
- false, false) != NULL)
- && discard != discard_all)
- {
- H_PUT_8 (output_bfd, N_TEXT, outsym->e_type);
- H_PUT_8 (output_bfd, 0, outsym->e_ovly);
- H_PUT_16 (output_bfd, 0, outsym->e_desc);
- strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
- bfd_get_filename (input_bfd), false);
- if (strtab_index == (bfd_size_type) -1)
- return false;
- PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
- PUT_WORD (output_bfd,
- (bfd_section_vma (obj_textsec (input_bfd)->output_section)
- + obj_textsec (input_bfd)->output_offset),
- outsym->e_value);
- ++obj_aout_external_sym_count (output_bfd);
- ++outsym;
- }
- pass = false;
- skip_next = false;
- sym = obj_aout_external_syms (input_bfd);
- sym_end = sym + sym_count;
- sym_hash = obj_aout_sym_hashes (input_bfd);
- symbol_map = flaginfo->symbol_map;
- memset (symbol_map, 0, (size_t) sym_count * sizeof *symbol_map);
- for (; sym < sym_end; sym++, sym_hash++, symbol_map++)
- {
- const char *name;
- int type;
- struct aout_link_hash_entry *h;
- bool skip;
- asection *symsec;
- bfd_vma val = 0;
- bool copy;
- /* We set *symbol_map to 0 above for all symbols. If it has
- already been set to -1 for this symbol, it means that we are
- discarding it because it appears in a duplicate header file.
- See the N_BINCL code below. */
- if (*symbol_map == -1)
- continue;
- /* Initialize *symbol_map to -1, which means that the symbol was
- not copied into the output file. We will change it later if
- we do copy the symbol over. */
- *symbol_map = -1;
- type = H_GET_8 (input_bfd, sym->e_type);
- name = strings + GET_WORD (input_bfd, sym->e_strx);
- h = NULL;
- if (pass)
- {
- /* Pass this symbol through. It is the target of an
- indirect or warning symbol. */
- val = GET_WORD (input_bfd, sym->e_value);
- pass = false;
- }
- else if (skip_next)
- {
- /* Skip this symbol, which is the target of an indirect
- symbol that we have changed to no longer be an indirect
- symbol. */
- skip_next = false;
- continue;
- }
- else
- {
- struct aout_link_hash_entry *hresolve;
- /* We have saved the hash table entry for this symbol, if
- there is one. Note that we could just look it up again
- in the hash table, provided we first check that it is an
- external symbol. */
- h = *sym_hash;
- /* Use the name from the hash table, in case the symbol was
- wrapped. */
- if (h != NULL)
- name = h->root.root.string;
- /* If this is an indirect or warning symbol, then change
- hresolve to the base symbol. We also change *sym_hash so
- that the relocation routines relocate against the real
- symbol. */
- hresolve = h;
- if (h != NULL
- && (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning))
- {
- hresolve = (struct aout_link_hash_entry *) h->root.u.i.link;
- while (hresolve->root.type == bfd_link_hash_indirect
- || hresolve->root.type == bfd_link_hash_warning)
- hresolve = ((struct aout_link_hash_entry *)
- hresolve->root.u.i.link);
- *sym_hash = hresolve;
- }
- /* If the symbol has already been written out, skip it. */
- if (h != NULL
- && h->root.type != bfd_link_hash_warning
- && h->written)
- {
- if ((type & N_TYPE) == N_INDR
- || type == N_WARNING)
- skip_next = true;
- *symbol_map = h->indx;
- continue;
- }
- /* See if we are stripping this symbol. */
- skip = false;
- switch (strip)
- {
- case strip_none:
- break;
- case strip_debugger:
- if (is_stab (type, name))
- skip = true;
- break;
- case strip_some:
- if (bfd_hash_lookup (flaginfo->info->keep_hash, name,
- false, false) == NULL)
- skip = true;
- break;
- case strip_all:
- skip = true;
- break;
- }
- if (skip)
- {
- if (h != NULL)
- h->written = true;
- continue;
- }
- /* Get the value of the symbol. */
- if (is_stab (type, name))
- {
- switch (type)
- {
- default:
- symsec = bfd_abs_section_ptr;
- break;
- case N_SO:
- case N_SOL:
- case N_FUN:
- case N_ENTRY:
- case N_SLINE:
- case N_FN:
- symsec = obj_textsec (input_bfd);
- break;
- case N_STSYM:
- case N_DSLINE:
- symsec = obj_datasec (input_bfd);
- break;
- case N_LCSYM:
- case N_BSLINE:
- symsec = obj_bsssec (input_bfd);
- break;
- }
- val = GET_WORD (input_bfd, sym->e_value);
- }
- else if ((type & N_TYPE) == N_TEXT
- || type == N_WEAKT)
- symsec = obj_textsec (input_bfd);
- else if ((type & N_TYPE) == N_DATA
- || type == N_WEAKD)
- symsec = obj_datasec (input_bfd);
- else if ((type & N_TYPE) == N_BSS
- || type == N_WEAKB)
- symsec = obj_bsssec (input_bfd);
- else if ((type & N_TYPE) == N_ABS
- || type == N_WEAKA)
- symsec = bfd_abs_section_ptr;
- else if (((type & N_TYPE) == N_INDR
- && (hresolve == NULL
- || (hresolve->root.type != bfd_link_hash_defined
- && hresolve->root.type != bfd_link_hash_defweak
- && hresolve->root.type != bfd_link_hash_common)))
- || type == N_WARNING)
- {
- /* Pass the next symbol through unchanged. The
- condition above for indirect symbols is so that if
- the indirect symbol was defined, we output it with
- the correct definition so the debugger will
- understand it. */
- pass = true;
- val = GET_WORD (input_bfd, sym->e_value);
- symsec = NULL;
- }
- else
- {
- /* If we get here with an indirect symbol, it means that
- we are outputting it with a real definition. In such
- a case we do not want to output the next symbol,
- which is the target of the indirection. */
- if ((type & N_TYPE) == N_INDR)
- skip_next = true;
- symsec = NULL;
- /* We need to get the value from the hash table. We use
- hresolve so that if we have defined an indirect
- symbol we output the final definition. */
- if (h == NULL)
- {
- switch (type & N_TYPE)
- {
- case N_SETT:
- symsec = obj_textsec (input_bfd);
- break;
- case N_SETD:
- symsec = obj_datasec (input_bfd);
- break;
- case N_SETB:
- symsec = obj_bsssec (input_bfd);
- break;
- case N_SETA:
- symsec = bfd_abs_section_ptr;
- break;
- default:
- val = 0;
- break;
- }
- }
- else if (hresolve->root.type == bfd_link_hash_defined
- || hresolve->root.type == bfd_link_hash_defweak)
- {
- asection *input_section;
- asection *output_section;
- /* This case usually means a common symbol which was
- turned into a defined symbol. */
- input_section = hresolve->root.u.def.section;
- output_section = input_section->output_section;
- BFD_ASSERT (bfd_is_abs_section (output_section)
- || output_section->owner == output_bfd);
- val = (hresolve->root.u.def.value
- + bfd_section_vma (output_section)
- + input_section->output_offset);
- /* Get the correct type based on the section. If
- this is a constructed set, force it to be
- globally visible. */
- if (type == N_SETT
- || type == N_SETD
- || type == N_SETB
- || type == N_SETA)
- type |= N_EXT;
- type &=~ N_TYPE;
- if (output_section == obj_textsec (output_bfd))
- type |= (hresolve->root.type == bfd_link_hash_defined
- ? N_TEXT
- : N_WEAKT);
- else if (output_section == obj_datasec (output_bfd))
- type |= (hresolve->root.type == bfd_link_hash_defined
- ? N_DATA
- : N_WEAKD);
- else if (output_section == obj_bsssec (output_bfd))
- type |= (hresolve->root.type == bfd_link_hash_defined
- ? N_BSS
- : N_WEAKB);
- else
- type |= (hresolve->root.type == bfd_link_hash_defined
- ? N_ABS
- : N_WEAKA);
- }
- else if (hresolve->root.type == bfd_link_hash_common)
- val = hresolve->root.u.c.size;
- else if (hresolve->root.type == bfd_link_hash_undefweak)
- {
- val = 0;
- type = N_WEAKU;
- }
- else
- val = 0;
- }
- if (symsec != NULL)
- val = (symsec->output_section->vma
- + symsec->output_offset
- + (GET_WORD (input_bfd, sym->e_value)
- - symsec->vma));
- /* If this is a global symbol set the written flag, and if
- it is a local symbol see if we should discard it. */
- if (h != NULL)
- {
- h->written = true;
- h->indx = obj_aout_external_sym_count (output_bfd);
- }
- else if ((type & N_TYPE) != N_SETT
- && (type & N_TYPE) != N_SETD
- && (type & N_TYPE) != N_SETB
- && (type & N_TYPE) != N_SETA)
- {
- switch (discard)
- {
- case discard_none:
- case discard_sec_merge:
- break;
- case discard_l:
- if (!is_stab (type, name)
- && bfd_is_local_label_name (input_bfd, name))
- skip = true;
- break;
- case discard_all:
- skip = true;
- break;
- }
- if (skip)
- {
- pass = false;
- continue;
- }
- }
- /* An N_BINCL symbol indicates the start of the stabs
- entries for a header file. We need to scan ahead to the
- next N_EINCL symbol, ignoring nesting, adding up all the
- characters in the symbol names, not including the file
- numbers in types (the first number after an open
- parenthesis). */
- if (type == N_BINCL)
- {
- struct external_nlist *incl_sym;
- int nest;
- struct aout_link_includes_entry *incl_entry;
- struct aout_link_includes_totals *t;
- val = 0;
- nest = 0;
- for (incl_sym = sym + 1; incl_sym < sym_end; incl_sym++)
- {
- int incl_type;
- incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
- if (incl_type == N_EINCL)
- {
- if (nest == 0)
- break;
- --nest;
- }
- else if (incl_type == N_BINCL)
- ++nest;
- else if (nest == 0)
- {
- const char *s;
- s = strings + GET_WORD (input_bfd, incl_sym->e_strx);
- for (; *s != '\0'; s++)
- {
- val += *s;
- if (*s == '(')
- {
- /* Skip the file number. */
- ++s;
- while (ISDIGIT (*s))
- ++s;
- --s;
- }
- }
- }
- }
- /* If we have already included a header file with the
- same value, then replace this one with an N_EXCL
- symbol. */
- copy = ! flaginfo->info->keep_memory;
- incl_entry = aout_link_includes_lookup (&flaginfo->includes,
- name, true, copy);
- if (incl_entry == NULL)
- return false;
- for (t = incl_entry->totals; t != NULL; t = t->next)
- if (t->total == val)
- break;
- if (t == NULL)
- {
- /* This is the first time we have seen this header
- file with this set of stabs strings. */
- t = bfd_hash_allocate (&flaginfo->includes.root,
- sizeof *t);
- if (t == NULL)
- return false;
- t->total = val;
- t->next = incl_entry->totals;
- incl_entry->totals = t;
- }
- else
- {
- int *incl_map;
- /* This is a duplicate header file. We must change
- it to be an N_EXCL entry, and mark all the
- included symbols to prevent outputting them. */
- type = N_EXCL;
- nest = 0;
- for (incl_sym = sym + 1, incl_map = symbol_map + 1;
- incl_sym < sym_end;
- incl_sym++, incl_map++)
- {
- int incl_type;
- incl_type = H_GET_8 (input_bfd, incl_sym->e_type);
- if (incl_type == N_EINCL)
- {
- if (nest == 0)
- {
- *incl_map = -1;
- break;
- }
- --nest;
- }
- else if (incl_type == N_BINCL)
- ++nest;
- else if (nest == 0)
- *incl_map = -1;
- }
- }
- }
- }
- /* Copy this symbol into the list of symbols we are going to
- write out. */
- H_PUT_8 (output_bfd, type, outsym->e_type);
- H_PUT_8 (output_bfd, H_GET_8 (input_bfd, sym->e_ovly), outsym->e_ovly);
- H_PUT_16 (output_bfd, H_GET_16 (input_bfd, sym->e_desc), outsym->e_desc);
- copy = false;
- if (! flaginfo->info->keep_memory)
- {
- /* name points into a string table which we are going to
- free. If there is a hash table entry, use that string.
- Otherwise, copy name into memory. */
- if (h != NULL)
- name = h->root.root.string;
- else
- copy = true;
- }
- strtab_index = add_to_stringtab (output_bfd, flaginfo->strtab,
- name, copy);
- if (strtab_index == (bfd_size_type) -1)
- return false;
- PUT_WORD (output_bfd, strtab_index, outsym->e_strx);
- PUT_WORD (output_bfd, val, outsym->e_value);
- *symbol_map = obj_aout_external_sym_count (output_bfd);
- ++obj_aout_external_sym_count (output_bfd);
- ++outsym;
- }
- /* Write out the output symbols we have just constructed. */
- if (outsym > flaginfo->output_syms)
- {
- bfd_size_type size;
- if (bfd_seek (output_bfd, flaginfo->symoff, SEEK_SET) != 0)
- return false;
- size = outsym - flaginfo->output_syms;
- size *= EXTERNAL_NLIST_SIZE;
- if (bfd_bwrite ((void *) flaginfo->output_syms, size, output_bfd) != size)
- return false;
- flaginfo->symoff += size;
- }
- return true;
- }
- /* Write out a symbol that was not associated with an a.out input
- object. */
- static bfd_vma
- bfd_getp32 (const void *p)
- {
- const bfd_byte *addr = p;
- unsigned long v;
- v = (unsigned long) addr[1] << 24;
- v |= (unsigned long) addr[0] << 16;
- v |= (unsigned long) addr[3] << 8;
- v |= (unsigned long) addr[2];
- return v;
- }
- #define COERCE32(x) (((bfd_signed_vma) (x) ^ 0x80000000) - 0x80000000)
- static bfd_signed_vma
- bfd_getp_signed_32 (const void *p)
- {
- const bfd_byte *addr = p;
- unsigned long v;
- v = (unsigned long) addr[1] << 24;
- v |= (unsigned long) addr[0] << 16;
- v |= (unsigned long) addr[3] << 8;
- v |= (unsigned long) addr[2];
- return COERCE32 (v);
- }
- static void
- bfd_putp32 (bfd_vma data, void *p)
- {
- bfd_byte *addr = p;
- addr[0] = (data >> 16) & 0xff;
- addr[1] = (data >> 24) & 0xff;
- addr[2] = (data >> 0) & 0xff;
- addr[3] = (data >> 8) & 0xff;
- }
- const bfd_target MY (vec) =
- {
- TARGETNAME, /* Name. */
- bfd_target_aout_flavour,
- BFD_ENDIAN_LITTLE, /* Target byte order (little). */
- BFD_ENDIAN_LITTLE, /* Target headers byte order (little). */
- (HAS_RELOC | EXEC_P | /* Object flags. */
- HAS_LINENO | HAS_DEBUG |
- HAS_SYMS | HAS_LOCALS | WP_TEXT),
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
- MY_symbol_leading_char,
- AR_PAD_CHAR, /* AR_pad_char. */
- 15, /* AR_max_namelen. */
- 0, /* match priority. */
- TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */
- bfd_getl64, bfd_getl_signed_64, bfd_putl64,
- bfd_getp32, bfd_getp_signed_32, bfd_putp32,
- bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Data. */
- bfd_getl64, bfd_getl_signed_64, bfd_putl64,
- bfd_getp32, bfd_getp_signed_32, bfd_putp32,
- bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* Headers. */
- { /* bfd_check_format. */
- _bfd_dummy_target,
- MY_object_p,
- bfd_generic_archive_p,
- MY_core_file_p
- },
- { /* bfd_set_format. */
- _bfd_bool_bfd_false_error,
- MY_mkobject,
- _bfd_generic_mkarchive,
- _bfd_bool_bfd_false_error
- },
- { /* bfd_write_contents. */
- _bfd_bool_bfd_false_error,
- MY_write_object_contents,
- _bfd_write_archive_contents,
- _bfd_bool_bfd_false_error
- },
- BFD_JUMP_TABLE_GENERIC (MY),
- BFD_JUMP_TABLE_COPY (MY),
- BFD_JUMP_TABLE_CORE (MY),
- BFD_JUMP_TABLE_ARCHIVE (MY),
- BFD_JUMP_TABLE_SYMBOLS (MY),
- BFD_JUMP_TABLE_RELOCS (MY),
- BFD_JUMP_TABLE_WRITE (MY),
- BFD_JUMP_TABLE_LINK (MY),
- BFD_JUMP_TABLE_DYNAMIC (MY),
- /* Alternative_target. */
- NULL,
- (void *) MY_backend_data
- };
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