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- /* read.c - read a source file -
- Copyright (C) 1986-2022 Free Software Foundation, Inc.
- This file is part of GAS, the GNU Assembler.
- GAS 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, or (at your option)
- any later version.
- GAS 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 GAS; see the file COPYING. If not, write to the Free
- Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
- 02110-1301, USA. */
- /* If your chars aren't 8 bits, you will change this a bit (eg. to 0xFF).
- But then, GNU isn't supposed to run on your machine anyway.
- (RMS is so shortsighted sometimes.) */
- #define MASK_CHAR ((int)(unsigned char) -1)
- /* This is the largest known floating point format (for now). It will
- grow when we do 4361 style flonums. */
- #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16)
- /* Routines that read assembler source text to build spaghetti in memory.
- Another group of these functions is in the expr.c module. */
- #include "as.h"
- #include "safe-ctype.h"
- #include "subsegs.h"
- #include "sb.h"
- #include "macro.h"
- #include "obstack.h"
- #include "ecoff.h"
- #include "dw2gencfi.h"
- #include "wchar.h"
- #include <limits.h>
- #ifndef TC_START_LABEL
- #define TC_START_LABEL(STR, NUL_CHAR, NEXT_CHAR) (NEXT_CHAR == ':')
- #endif
- /* Set by the object-format or the target. */
- #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT
- #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \
- do \
- { \
- if ((SIZE) >= 8) \
- (P2VAR) = 3; \
- else if ((SIZE) >= 4) \
- (P2VAR) = 2; \
- else if ((SIZE) >= 2) \
- (P2VAR) = 1; \
- else \
- (P2VAR) = 0; \
- } \
- while (0)
- #endif
- char *input_line_pointer; /*->next char of source file to parse. */
- bool input_from_string = false;
- #if BITS_PER_CHAR != 8
- /* The following table is indexed by[(char)] and will break if
- a char does not have exactly 256 states (hopefully 0:255!)! */
- die horribly;
- #endif
- #ifndef LEX_AT
- #define LEX_AT 0
- #endif
- #ifndef LEX_BR
- /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */
- #define LEX_BR 0
- #endif
- #ifndef LEX_PCT
- /* The Delta 68k assembler permits % inside label names. */
- #define LEX_PCT 0
- #endif
- #ifndef LEX_QM
- /* The PowerPC Windows NT assemblers permits ? inside label names. */
- #define LEX_QM 0
- #endif
- #ifndef LEX_HASH
- /* The IA-64 assembler uses # as a suffix designating a symbol. We include
- it in the symbol and strip it out in tc_canonicalize_symbol_name. */
- #define LEX_HASH 0
- #endif
- #ifndef LEX_DOLLAR
- #define LEX_DOLLAR 3
- #endif
- #ifndef LEX_TILDE
- /* The Delta 68k assembler permits ~ at start of label names. */
- #define LEX_TILDE 0
- #endif
- /* Used by is_... macros. our ctype[]. */
- char lex_type[256] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */
- 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */
- LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */
- 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3
- };
- /* In: a character.
- Out: 1 if this character ends a line.
- 2 if this character is a line separator. */
- char is_end_of_line[256] = {
- #ifdef CR_EOL
- 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */
- #else
- 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */
- #endif
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 /* */
- };
- #ifndef TC_CASE_SENSITIVE
- char original_case_string[128];
- #endif
- /* Functions private to this file. */
- static char *buffer; /* 1st char of each buffer of lines is here. */
- static char *buffer_limit; /*->1 + last char in buffer. */
- /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1
- in the tc-<CPU>.h file. See the "Porting GAS" section of the
- internals manual. */
- int target_big_endian = TARGET_BYTES_BIG_ENDIAN;
- /* Variables for handling include file directory table. */
- /* Table of pointers to directories to search for .include's. */
- const char **include_dirs;
- /* How many are in the table. */
- int include_dir_count;
- /* Length of longest in table. */
- int include_dir_maxlen = 1;
- #ifndef WORKING_DOT_WORD
- struct broken_word *broken_words;
- int new_broken_words;
- #endif
- /* The current offset into the absolute section. We don't try to
- build frags in the absolute section, since no data can be stored
- there. We just keep track of the current offset. */
- addressT abs_section_offset;
- /* If this line had an MRI style label, it is stored in this variable.
- This is used by some of the MRI pseudo-ops. */
- symbolS *line_label;
- /* This global variable is used to support MRI common sections. We
- translate such sections into a common symbol. This variable is
- non-NULL when we are in an MRI common section. */
- symbolS *mri_common_symbol;
- /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we
- need to align to an even byte boundary unless the next pseudo-op is
- dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment
- may be needed. */
- static int mri_pending_align;
- #ifndef NO_LISTING
- #ifdef OBJ_ELF
- /* This variable is set to be non-zero if the next string we see might
- be the name of the source file in DWARF debugging information. See
- the comment in emit_expr for the format we look for. */
- static int dwarf_file_string;
- #endif
- #endif
- /* If the target defines the md_frag_max_var hook then we know
- enough to implement the .bundle_align_mode features. */
- #ifdef md_frag_max_var
- # define HANDLE_BUNDLE
- #endif
- #ifdef HANDLE_BUNDLE
- /* .bundle_align_mode sets this. Normally it's zero. When nonzero,
- it's the exponent of the bundle size, and aligned instruction bundle
- mode is in effect. */
- static unsigned int bundle_align_p2;
- /* These are set by .bundle_lock and .bundle_unlock. .bundle_lock sets
- bundle_lock_frag to frag_now and then starts a new frag with
- frag_align_code. At the same time, bundle_lock_frain gets frchain_now,
- so that .bundle_unlock can verify that we didn't change segments.
- .bundle_unlock resets both to NULL. If we detect a bundling violation,
- then we reset bundle_lock_frchain to NULL as an indicator that we've
- already diagnosed the error with as_bad and don't need a cascade of
- redundant errors, but bundle_lock_frag remains set to indicate that
- we are expecting to see .bundle_unlock. */
- static fragS *bundle_lock_frag;
- static frchainS *bundle_lock_frchain;
- /* This is incremented by .bundle_lock and decremented by .bundle_unlock,
- to allow nesting. */
- static unsigned int bundle_lock_depth;
- #endif
- static void do_s_func (int end_p, const char *default_prefix);
- static void s_align (int, int);
- static void s_altmacro (int);
- static void s_bad_end (int);
- static void s_reloc (int);
- static int hex_float (int, char *);
- static segT get_known_segmented_expression (expressionS * expP);
- static void pobegin (void);
- static size_t get_non_macro_line_sb (sb *);
- static void generate_file_debug (void);
- static char *_find_end_of_line (char *, int, int, int);
- void
- read_begin (void)
- {
- const char *p;
- pobegin ();
- obj_read_begin_hook ();
- /* Something close -- but not too close -- to a multiple of 1024.
- The debugging malloc I'm using has 24 bytes of overhead. */
- obstack_begin (¬es, chunksize);
- obstack_begin (&cond_obstack, chunksize);
- #ifndef tc_line_separator_chars
- #define tc_line_separator_chars line_separator_chars
- #endif
- /* Use machine dependent syntax. */
- for (p = tc_line_separator_chars; *p; p++)
- is_end_of_line[(unsigned char) *p] = 2;
- /* Use more. FIXME-SOMEDAY. */
- if (flag_mri)
- lex_type['?'] = 3;
- }
- #ifndef TC_ADDRESS_BYTES
- #define TC_ADDRESS_BYTES address_bytes
- static inline int
- address_bytes (void)
- {
- /* Choose smallest of 1, 2, 4, 8 bytes that is large enough to
- contain an address. */
- int n = (stdoutput->arch_info->bits_per_address - 1) / 8;
- n |= n >> 1;
- n |= n >> 2;
- n += 1;
- return n;
- }
- #endif
- /* Set up pseudo-op tables. */
- struct po_entry
- {
- const char *poc_name;
- const pseudo_typeS *pop;
- };
- typedef struct po_entry po_entry_t;
- /* Hash function for a po_entry. */
- static hashval_t
- hash_po_entry (const void *e)
- {
- const po_entry_t *entry = (const po_entry_t *) e;
- return htab_hash_string (entry->poc_name);
- }
- /* Equality function for a po_entry. */
- static int
- eq_po_entry (const void *a, const void *b)
- {
- const po_entry_t *ea = (const po_entry_t *) a;
- const po_entry_t *eb = (const po_entry_t *) b;
- return strcmp (ea->poc_name, eb->poc_name) == 0;
- }
- static po_entry_t *
- po_entry_alloc (const char *poc_name, const pseudo_typeS *pop)
- {
- po_entry_t *entry = XNEW (po_entry_t);
- entry->poc_name = poc_name;
- entry->pop = pop;
- return entry;
- }
- static const pseudo_typeS *
- po_entry_find (htab_t table, const char *poc_name)
- {
- po_entry_t needle = { poc_name, NULL };
- po_entry_t *entry = htab_find (table, &needle);
- return entry != NULL ? entry->pop : NULL;
- }
- static struct htab *po_hash;
- static const pseudo_typeS potable[] = {
- {"abort", s_abort, 0},
- {"align", s_align_ptwo, 0},
- {"altmacro", s_altmacro, 1},
- {"ascii", stringer, 8+0},
- {"asciz", stringer, 8+1},
- {"balign", s_align_bytes, 0},
- {"balignw", s_align_bytes, -2},
- {"balignl", s_align_bytes, -4},
- /* block */
- #ifdef HANDLE_BUNDLE
- {"bundle_align_mode", s_bundle_align_mode, 0},
- {"bundle_lock", s_bundle_lock, 0},
- {"bundle_unlock", s_bundle_unlock, 0},
- #endif
- {"byte", cons, 1},
- {"comm", s_comm, 0},
- {"common", s_mri_common, 0},
- {"common.s", s_mri_common, 1},
- {"data", s_data, 0},
- {"dc", cons, 2},
- {"dc.a", cons, 0},
- {"dc.b", cons, 1},
- {"dc.d", float_cons, 'd'},
- {"dc.l", cons, 4},
- {"dc.s", float_cons, 'f'},
- {"dc.w", cons, 2},
- {"dc.x", float_cons, 'x'},
- {"dcb", s_space, 2},
- {"dcb.b", s_space, 1},
- {"dcb.d", s_float_space, 'd'},
- {"dcb.l", s_space, 4},
- {"dcb.s", s_float_space, 'f'},
- {"dcb.w", s_space, 2},
- {"dcb.x", s_float_space, 'x'},
- {"ds", s_space, 2},
- {"ds.b", s_space, 1},
- {"ds.d", s_space, 8},
- {"ds.l", s_space, 4},
- {"ds.p", s_space, 'p'},
- {"ds.s", s_space, 4},
- {"ds.w", s_space, 2},
- {"ds.x", s_space, 'x'},
- {"debug", s_ignore, 0},
- #ifdef S_SET_DESC
- {"desc", s_desc, 0},
- #endif
- /* dim */
- {"double", float_cons, 'd'},
- /* dsect */
- {"eject", listing_eject, 0}, /* Formfeed listing. */
- {"else", s_else, 0},
- {"elsec", s_else, 0},
- {"elseif", s_elseif, (int) O_ne},
- {"end", s_end, 0},
- {"endc", s_endif, 0},
- {"endfunc", s_func, 1},
- {"endif", s_endif, 0},
- {"endm", s_bad_end, 0},
- {"endr", s_bad_end, 1},
- /* endef */
- {"equ", s_set, 0},
- {"equiv", s_set, 1},
- {"eqv", s_set, -1},
- {"err", s_err, 0},
- {"error", s_errwarn, 1},
- {"exitm", s_mexit, 0},
- /* extend */
- {"extern", s_ignore, 0}, /* We treat all undef as ext. */
- {"appfile", s_app_file, 1},
- {"appline", s_app_line, 1},
- {"fail", s_fail, 0},
- {"file", s_app_file, 0},
- {"fill", s_fill, 0},
- {"float", float_cons, 'f'},
- {"format", s_ignore, 0},
- {"func", s_func, 0},
- {"global", s_globl, 0},
- {"globl", s_globl, 0},
- {"hword", cons, 2},
- {"if", s_if, (int) O_ne},
- {"ifb", s_ifb, 1},
- {"ifc", s_ifc, 0},
- {"ifdef", s_ifdef, 0},
- {"ifeq", s_if, (int) O_eq},
- {"ifeqs", s_ifeqs, 0},
- {"ifge", s_if, (int) O_ge},
- {"ifgt", s_if, (int) O_gt},
- {"ifle", s_if, (int) O_le},
- {"iflt", s_if, (int) O_lt},
- {"ifnb", s_ifb, 0},
- {"ifnc", s_ifc, 1},
- {"ifndef", s_ifdef, 1},
- {"ifne", s_if, (int) O_ne},
- {"ifnes", s_ifeqs, 1},
- {"ifnotdef", s_ifdef, 1},
- {"incbin", s_incbin, 0},
- {"include", s_include, 0},
- {"int", cons, 4},
- {"irp", s_irp, 0},
- {"irep", s_irp, 0},
- {"irpc", s_irp, 1},
- {"irepc", s_irp, 1},
- {"lcomm", s_lcomm, 0},
- {"lflags", s_ignore, 0}, /* Listing flags. */
- {"linefile", s_app_line, 0},
- {"linkonce", s_linkonce, 0},
- {"list", listing_list, 1}, /* Turn listing on. */
- {"llen", listing_psize, 1},
- {"long", cons, 4},
- {"lsym", s_lsym, 0},
- {"macro", s_macro, 0},
- {"mexit", s_mexit, 0},
- {"mri", s_mri, 0},
- {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */
- {"name", s_ignore, 0},
- {"noaltmacro", s_altmacro, 0},
- {"noformat", s_ignore, 0},
- {"nolist", listing_list, 0}, /* Turn listing off. */
- {"nopage", listing_nopage, 0},
- {"nop", s_nop, 0},
- {"nops", s_nops, 0},
- {"octa", cons, 16},
- {"offset", s_struct, 0},
- {"org", s_org, 0},
- {"p2align", s_align_ptwo, 0},
- {"p2alignw", s_align_ptwo, -2},
- {"p2alignl", s_align_ptwo, -4},
- {"page", listing_eject, 0},
- {"plen", listing_psize, 0},
- {"print", s_print, 0},
- {"psize", listing_psize, 0}, /* Set paper size. */
- {"purgem", s_purgem, 0},
- {"quad", cons, 8},
- {"reloc", s_reloc, 0},
- {"rep", s_rept, 0},
- {"rept", s_rept, 0},
- {"rva", s_rva, 4},
- {"sbttl", listing_title, 1}, /* Subtitle of listing. */
- /* scl */
- /* sect */
- {"set", s_set, 0},
- {"short", cons, 2},
- {"single", float_cons, 'f'},
- /* size */
- {"space", s_space, 0},
- {"skip", s_space, 0},
- {"sleb128", s_leb128, 1},
- {"spc", s_ignore, 0},
- {"stabd", s_stab, 'd'},
- {"stabn", s_stab, 'n'},
- {"stabs", s_stab, 's'},
- {"string", stringer, 8+1},
- {"string8", stringer, 8+1},
- {"string16", stringer, 16+1},
- {"string32", stringer, 32+1},
- {"string64", stringer, 64+1},
- {"struct", s_struct, 0},
- /* tag */
- {"text", s_text, 0},
- /* This is for gcc to use. It's only just been added (2/94), so gcc
- won't be able to use it for a while -- probably a year or more.
- But once this has been released, check with gcc maintainers
- before deleting it or even changing the spelling. */
- {"this_GCC_requires_the_GNU_assembler", s_ignore, 0},
- /* If we're folding case -- done for some targets, not necessarily
- all -- the above string in an input file will be converted to
- this one. Match it either way... */
- {"this_gcc_requires_the_gnu_assembler", s_ignore, 0},
- {"title", listing_title, 0}, /* Listing title. */
- {"ttl", listing_title, 0},
- /* type */
- {"uleb128", s_leb128, 0},
- /* use */
- /* val */
- {"xcom", s_comm, 0},
- {"xdef", s_globl, 0},
- {"xref", s_ignore, 0},
- {"xstabs", s_xstab, 's'},
- {"warning", s_errwarn, 0},
- {"weakref", s_weakref, 0},
- {"word", cons, 2},
- {"zero", s_space, 0},
- {"2byte", cons, 2},
- {"4byte", cons, 4},
- {"8byte", cons, 8},
- {NULL, NULL, 0} /* End sentinel. */
- };
- static offsetT
- get_absolute_expr (expressionS *exp)
- {
- expression_and_evaluate (exp);
- if (exp->X_op != O_constant)
- {
- if (exp->X_op != O_absent)
- as_bad (_("bad or irreducible absolute expression"));
- exp->X_add_number = 0;
- }
- return exp->X_add_number;
- }
- offsetT
- get_absolute_expression (void)
- {
- expressionS exp;
- return get_absolute_expr (&exp);
- }
- static int pop_override_ok = 0;
- static const char *pop_table_name;
- void
- pop_insert (const pseudo_typeS *table)
- {
- const pseudo_typeS *pop;
- for (pop = table; pop->poc_name; pop++)
- {
- po_entry_t *elt = po_entry_alloc (pop->poc_name, pop);
- if (htab_insert (po_hash, elt, 0) != NULL)
- {
- free (elt);
- if (!pop_override_ok)
- as_fatal (_("error constructing %s pseudo-op table"),
- pop_table_name);
- }
- }
- }
- #ifndef md_pop_insert
- #define md_pop_insert() pop_insert(md_pseudo_table)
- #endif
- #ifndef obj_pop_insert
- #define obj_pop_insert() pop_insert(obj_pseudo_table)
- #endif
- #ifndef cfi_pop_insert
- #define cfi_pop_insert() pop_insert(cfi_pseudo_table)
- #endif
- static void
- pobegin (void)
- {
- po_hash = htab_create_alloc (16, hash_po_entry, eq_po_entry, NULL,
- xcalloc, xfree);
- /* Do the target-specific pseudo ops. */
- pop_table_name = "md";
- md_pop_insert ();
- /* Now object specific. Skip any that were in the target table. */
- pop_table_name = "obj";
- pop_override_ok = 1;
- obj_pop_insert ();
- /* Now portable ones. Skip any that we've seen already. */
- pop_table_name = "standard";
- pop_insert (potable);
- /* Now CFI ones. */
- pop_table_name = "cfi";
- pop_override_ok = 1;
- cfi_pop_insert ();
- }
- #define HANDLE_CONDITIONAL_ASSEMBLY(num_read) \
- if (ignore_input ()) \
- { \
- char *eol = find_end_of_line (input_line_pointer - (num_read), \
- flag_m68k_mri); \
- input_line_pointer = (input_line_pointer <= buffer_limit \
- && eol >= buffer_limit) \
- ? buffer_limit \
- : eol + 1; \
- continue; \
- }
- /* This function is used when scrubbing the characters between #APP
- and #NO_APP. */
- static char *scrub_string;
- static char *scrub_string_end;
- static size_t
- scrub_from_string (char *buf, size_t buflen)
- {
- size_t copy;
- copy = scrub_string_end - scrub_string;
- if (copy > buflen)
- copy = buflen;
- memcpy (buf, scrub_string, copy);
- scrub_string += copy;
- return copy;
- }
- /* Helper function of read_a_source_file, which tries to expand a macro. */
- static int
- try_macro (char term, const char *line)
- {
- sb out;
- const char *err;
- macro_entry *macro;
- if (check_macro (line, &out, &err, ¯o))
- {
- if (err != NULL)
- as_bad ("%s", err);
- *input_line_pointer++ = term;
- input_scrub_include_sb (&out,
- input_line_pointer, 1);
- sb_kill (&out);
- buffer_limit =
- input_scrub_next_buffer (&input_line_pointer);
- #ifdef md_macro_info
- md_macro_info (macro);
- #endif
- return 1;
- }
- return 0;
- }
- #ifdef HANDLE_BUNDLE
- /* Start a new instruction bundle. Returns the rs_align_code frag that
- will be used to align the new bundle. */
- static fragS *
- start_bundle (void)
- {
- fragS *frag = frag_now;
- frag_align_code (0, 0);
- while (frag->fr_type != rs_align_code)
- frag = frag->fr_next;
- gas_assert (frag != frag_now);
- return frag;
- }
- /* Calculate the maximum size after relaxation of the region starting
- at the given frag and extending through frag_now (which is unfinished). */
- static unsigned int
- pending_bundle_size (fragS *frag)
- {
- unsigned int offset = frag->fr_fix;
- unsigned int size = 0;
- gas_assert (frag != frag_now);
- gas_assert (frag->fr_type == rs_align_code);
- while (frag != frag_now)
- {
- /* This should only happen in what will later become an error case. */
- if (frag == NULL)
- return 0;
- size += frag->fr_fix;
- if (frag->fr_type == rs_machine_dependent)
- size += md_frag_max_var (frag);
- frag = frag->fr_next;
- }
- gas_assert (frag == frag_now);
- size += frag_now_fix ();
- if (frag->fr_type == rs_machine_dependent)
- size += md_frag_max_var (frag);
- gas_assert (size >= offset);
- return size - offset;
- }
- /* Finish off the frag created to ensure bundle alignment. */
- static void
- finish_bundle (fragS *frag, unsigned int size)
- {
- gas_assert (bundle_align_p2 > 0);
- gas_assert (frag->fr_type == rs_align_code);
- if (size > 1)
- {
- /* If there is more than a single byte, then we need to set up the
- alignment frag. Otherwise we leave it at its initial state from
- calling frag_align_code (0, 0), so that it does nothing. */
- frag->fr_offset = bundle_align_p2;
- frag->fr_subtype = size - 1;
- }
- /* We do this every time rather than just in s_bundle_align_mode
- so that we catch any affected section without needing hooks all
- over for all paths that do section changes. It's cheap enough. */
- if (bundle_align_p2 > OCTETS_PER_BYTE_POWER)
- record_alignment (now_seg, bundle_align_p2 - OCTETS_PER_BYTE_POWER);
- }
- /* Assemble one instruction. This takes care of the bundle features
- around calling md_assemble. */
- static void
- assemble_one (char *line)
- {
- fragS *insn_start_frag = NULL;
- if (bundle_lock_frchain != NULL && bundle_lock_frchain != frchain_now)
- {
- as_bad (_("cannot change section or subsection inside .bundle_lock"));
- /* Clearing this serves as a marker that we have already complained. */
- bundle_lock_frchain = NULL;
- }
- if (bundle_lock_frchain == NULL && bundle_align_p2 > 0)
- insn_start_frag = start_bundle ();
- md_assemble (line);
- if (bundle_lock_frchain != NULL)
- {
- /* Make sure this hasn't pushed the locked sequence
- past the bundle size. */
- unsigned int bundle_size = pending_bundle_size (bundle_lock_frag);
- if (bundle_size > 1U << bundle_align_p2)
- as_bad (_ (".bundle_lock sequence at %u bytes, "
- "but .bundle_align_mode limit is %u bytes"),
- bundle_size, 1U << bundle_align_p2);
- }
- else if (bundle_align_p2 > 0)
- {
- unsigned int insn_size = pending_bundle_size (insn_start_frag);
- if (insn_size > 1U << bundle_align_p2)
- as_bad (_("single instruction is %u bytes long, "
- "but .bundle_align_mode limit is %u bytes"),
- insn_size, 1U << bundle_align_p2);
- finish_bundle (insn_start_frag, insn_size);
- }
- }
- #else /* !HANDLE_BUNDLE */
- # define assemble_one(line) md_assemble(line)
- #endif /* HANDLE_BUNDLE */
- static bool
- in_bss (void)
- {
- flagword flags = bfd_section_flags (now_seg);
- return (flags & SEC_ALLOC) && !(flags & (SEC_LOAD | SEC_HAS_CONTENTS));
- }
- /* Guts of .align directive:
- N is the power of two to which to align. A value of zero is accepted but
- ignored: the default alignment of the section will be at least this.
- FILL may be NULL, or it may point to the bytes of the fill pattern.
- LEN is the length of whatever FILL points to, if anything. If LEN is zero
- but FILL is not NULL then LEN is treated as if it were one.
- MAX is the maximum number of characters to skip when doing the alignment,
- or 0 if there is no maximum. */
- void
- do_align (unsigned int n, char *fill, unsigned int len, unsigned int max)
- {
- if (now_seg == absolute_section || in_bss ())
- {
- if (fill != NULL)
- while (len-- > 0)
- if (*fill++ != '\0')
- {
- if (now_seg == absolute_section)
- as_warn (_("ignoring fill value in absolute section"));
- else
- as_warn (_("ignoring fill value in section `%s'"),
- segment_name (now_seg));
- break;
- }
- fill = NULL;
- len = 0;
- }
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- #ifdef md_do_align
- md_do_align (n, fill, len, max, just_record_alignment);
- #endif
- /* Only make a frag if we HAVE to... */
- if ((n > OCTETS_PER_BYTE_POWER) && !need_pass_2)
- {
- if (fill == NULL)
- {
- if (subseg_text_p (now_seg))
- frag_align_code (n, max);
- else
- frag_align (n, 0, max);
- }
- else if (len <= 1)
- frag_align (n, *fill, max);
- else
- frag_align_pattern (n, fill, len, max);
- }
- #ifdef md_do_align
- just_record_alignment: ATTRIBUTE_UNUSED_LABEL
- #endif
- if (n > OCTETS_PER_BYTE_POWER)
- record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER);
- }
- /* We read the file, putting things into a web that represents what we
- have been reading. */
- void
- read_a_source_file (const char *name)
- {
- char nul_char;
- char next_char;
- char *s; /* String of symbol, '\0' appended. */
- long temp;
- const pseudo_typeS *pop;
- #ifdef WARN_COMMENTS
- found_comment = 0;
- #endif
- buffer = input_scrub_new_file (name);
- listing_file (name);
- listing_newline (NULL);
- register_dependency (name);
- /* Generate debugging information before we've read anything in to denote
- this file as the "main" source file and not a subordinate one
- (e.g. N_SO vs N_SOL in stabs). */
- generate_file_debug ();
- while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0)
- { /* We have another line to parse. */
- #ifndef NO_LISTING
- /* In order to avoid listing macro expansion lines with labels
- multiple times, keep track of which line was last issued. */
- static char *last_eol;
- last_eol = NULL;
- #endif
- while (input_line_pointer < buffer_limit)
- {
- bool was_new_line;
- /* We have more of this buffer to parse. */
- /* We now have input_line_pointer->1st char of next line.
- If input_line_pointer [-1] == '\n' then we just
- scanned another line: so bump line counters. */
- was_new_line = is_end_of_line[(unsigned char) input_line_pointer[-1]];
- if (was_new_line)
- {
- symbol_set_value_now (&dot_symbol);
- #ifdef md_start_line_hook
- md_start_line_hook ();
- #endif
- if (input_line_pointer[-1] == '\n')
- bump_line_counters ();
- }
- #ifndef NO_LISTING
- /* If listing is on, and we are expanding a macro, then give
- the listing code the contents of the expanded line. */
- if (listing)
- {
- if ((listing & LISTING_MACEXP) && macro_nest > 0)
- {
- /* Find the end of the current expanded macro line. */
- s = find_end_of_line (input_line_pointer, flag_m68k_mri);
- if (s != last_eol)
- {
- char *copy;
- int len;
- last_eol = s;
- /* Copy it for safe keeping. Also give an indication of
- how much macro nesting is involved at this point. */
- len = s - input_line_pointer;
- copy = XNEWVEC (char, len + macro_nest + 2);
- memset (copy, '>', macro_nest);
- copy[macro_nest] = ' ';
- memcpy (copy + macro_nest + 1, input_line_pointer, len);
- copy[macro_nest + 1 + len] = '\0';
- /* Install the line with the listing facility. */
- listing_newline (copy);
- }
- }
- else
- listing_newline (NULL);
- }
- #endif
- if (was_new_line)
- {
- line_label = NULL;
- if (LABELS_WITHOUT_COLONS || flag_m68k_mri)
- {
- next_char = * input_line_pointer;
- /* Text at the start of a line must be a label, we
- run down and stick a colon in. */
- if (is_name_beginner (next_char) || next_char == '"')
- {
- char *line_start;
- int mri_line_macro;
- HANDLE_CONDITIONAL_ASSEMBLY (0);
- nul_char = get_symbol_name (& line_start);
- next_char = (nul_char == '"' ? input_line_pointer[1] : nul_char);
- /* In MRI mode, the EQU and MACRO pseudoops must
- be handled specially. */
- mri_line_macro = 0;
- if (flag_m68k_mri)
- {
- char *rest = input_line_pointer + 1;
- if (*rest == ':')
- ++rest;
- if (*rest == ' ' || *rest == '\t')
- ++rest;
- if ((strncasecmp (rest, "EQU", 3) == 0
- || strncasecmp (rest, "SET", 3) == 0)
- && (rest[3] == ' ' || rest[3] == '\t'))
- {
- input_line_pointer = rest + 3;
- equals (line_start,
- strncasecmp (rest, "SET", 3) == 0);
- continue;
- }
- if (strncasecmp (rest, "MACRO", 5) == 0
- && (rest[5] == ' '
- || rest[5] == '\t'
- || is_end_of_line[(unsigned char) rest[5]]))
- mri_line_macro = 1;
- }
- /* In MRI mode, we need to handle the MACRO
- pseudo-op specially: we don't want to put the
- symbol in the symbol table. */
- if (!mri_line_macro
- #ifdef TC_START_LABEL_WITHOUT_COLON
- && TC_START_LABEL_WITHOUT_COLON (nul_char, next_char)
- #endif
- )
- line_label = colon (line_start);
- else
- line_label = symbol_create (line_start,
- absolute_section,
- &zero_address_frag, 0);
- next_char = restore_line_pointer (nul_char);
- if (next_char == ':')
- input_line_pointer++;
- }
- }
- }
- /* We are at the beginning of a line, or similar place.
- We expect a well-formed assembler statement.
- A "symbol-name:" is a statement.
- Depending on what compiler is used, the order of these tests
- may vary to catch most common case 1st.
- Each test is independent of all other tests at the (top)
- level. */
- do
- nul_char = next_char = *input_line_pointer++;
- while (next_char == '\t' || next_char == ' ' || next_char == '\f');
- /* C is the 1st significant character.
- Input_line_pointer points after that character. */
- if (is_name_beginner (next_char) || next_char == '"')
- {
- char *rest;
- /* Want user-defined label or pseudo/opcode. */
- HANDLE_CONDITIONAL_ASSEMBLY (1);
- --input_line_pointer;
- nul_char = get_symbol_name (& s); /* name's delimiter. */
- next_char = (nul_char == '"' ? input_line_pointer[1] : nul_char);
- rest = input_line_pointer + (nul_char == '"' ? 2 : 1);
- /* NEXT_CHAR is character after symbol.
- The end of symbol in the input line is now '\0'.
- S points to the beginning of the symbol.
- [In case of pseudo-op, s->'.'.]
- Input_line_pointer->'\0' where NUL_CHAR was. */
- if (TC_START_LABEL (s, nul_char, next_char))
- {
- if (flag_m68k_mri)
- {
- /* In MRI mode, \tsym: set 0 is permitted. */
- if (*rest == ':')
- ++rest;
- if (*rest == ' ' || *rest == '\t')
- ++rest;
- if ((strncasecmp (rest, "EQU", 3) == 0
- || strncasecmp (rest, "SET", 3) == 0)
- && (rest[3] == ' ' || rest[3] == '\t'))
- {
- input_line_pointer = rest + 3;
- equals (s, 1);
- continue;
- }
- }
- line_label = colon (s); /* User-defined label. */
- restore_line_pointer (nul_char);
- ++ input_line_pointer;
- #ifdef tc_check_label
- tc_check_label (line_label);
- #endif
- /* Input_line_pointer->after ':'. */
- SKIP_WHITESPACE ();
- }
- else if ((next_char == '=' && *rest == '=')
- || ((next_char == ' ' || next_char == '\t')
- && rest[0] == '='
- && rest[1] == '='))
- {
- equals (s, -1);
- demand_empty_rest_of_line ();
- }
- else if ((next_char == '='
- || ((next_char == ' ' || next_char == '\t')
- && *rest == '='))
- #ifdef TC_EQUAL_IN_INSN
- && !TC_EQUAL_IN_INSN (next_char, s)
- #endif
- )
- {
- equals (s, 1);
- demand_empty_rest_of_line ();
- }
- else
- {
- /* Expect pseudo-op or machine instruction. */
- pop = NULL;
- #ifndef TC_CASE_SENSITIVE
- {
- char *s2 = s;
- strncpy (original_case_string, s2,
- sizeof (original_case_string) - 1);
- original_case_string[sizeof (original_case_string) - 1] = 0;
- while (*s2)
- {
- *s2 = TOLOWER (*s2);
- s2++;
- }
- }
- #endif
- if (NO_PSEUDO_DOT || flag_m68k_mri)
- {
- /* The MRI assembler uses pseudo-ops without
- a period. */
- pop = po_entry_find (po_hash, s);
- if (pop != NULL && pop->poc_handler == NULL)
- pop = NULL;
- }
- if (pop != NULL
- || (!flag_m68k_mri && *s == '.'))
- {
- /* PSEUDO - OP.
- WARNING: next_char may be end-of-line.
- We lookup the pseudo-op table with s+1 because we
- already know that the pseudo-op begins with a '.'. */
- if (pop == NULL)
- pop = po_entry_find (po_hash, s + 1);
- if (pop && !pop->poc_handler)
- pop = NULL;
- /* In MRI mode, we may need to insert an
- automatic alignment directive. What a hack
- this is. */
- if (mri_pending_align
- && (pop == NULL
- || !((pop->poc_handler == cons
- && pop->poc_val == 1)
- || (pop->poc_handler == s_space
- && pop->poc_val == 1)
- #ifdef tc_conditional_pseudoop
- || tc_conditional_pseudoop (pop)
- #endif
- || pop->poc_handler == s_if
- || pop->poc_handler == s_ifdef
- || pop->poc_handler == s_ifc
- || pop->poc_handler == s_ifeqs
- || pop->poc_handler == s_else
- || pop->poc_handler == s_endif
- || pop->poc_handler == s_globl
- || pop->poc_handler == s_ignore)))
- {
- do_align (1, (char *) NULL, 0, 0);
- mri_pending_align = 0;
- if (line_label != NULL)
- {
- symbol_set_frag (line_label, frag_now);
- S_SET_VALUE (line_label, frag_now_fix ());
- }
- }
- /* Print the error msg now, while we still can. */
- if (pop == NULL)
- {
- char *end = input_line_pointer;
- (void) restore_line_pointer (nul_char);
- s_ignore (0);
- nul_char = next_char = *--input_line_pointer;
- *input_line_pointer = '\0';
- if (! macro_defined || ! try_macro (next_char, s))
- {
- *end = '\0';
- as_bad (_("unknown pseudo-op: `%s'"), s);
- *input_line_pointer++ = nul_char;
- }
- continue;
- }
- /* Put it back for error messages etc. */
- next_char = restore_line_pointer (nul_char);
- /* The following skip of whitespace is compulsory.
- A well shaped space is sometimes all that separates
- keyword from operands. */
- if (next_char == ' ' || next_char == '\t')
- input_line_pointer++;
- /* Input_line is restored.
- Input_line_pointer->1st non-blank char
- after pseudo-operation. */
- (*pop->poc_handler) (pop->poc_val);
- /* If that was .end, just get out now. */
- if (pop->poc_handler == s_end)
- goto quit;
- }
- else
- {
- /* WARNING: next_char may be end-of-line. */
- /* Also: input_line_pointer->`\0` where nul_char was. */
- (void) restore_line_pointer (nul_char);
- input_line_pointer = _find_end_of_line (input_line_pointer, flag_m68k_mri, 1, 0);
- next_char = nul_char = *input_line_pointer;
- *input_line_pointer = '\0';
- generate_lineno_debug ();
- if (macro_defined && try_macro (next_char, s))
- continue;
- if (mri_pending_align)
- {
- do_align (1, (char *) NULL, 0, 0);
- mri_pending_align = 0;
- if (line_label != NULL)
- {
- symbol_set_frag (line_label, frag_now);
- S_SET_VALUE (line_label, frag_now_fix ());
- }
- }
- assemble_one (s); /* Assemble 1 instruction. */
- /* PR 19630: The backend may have set ilp to NULL
- if it encountered a catastrophic failure. */
- if (input_line_pointer == NULL)
- as_fatal (_("unable to continue with assembly."));
-
- *input_line_pointer++ = nul_char;
- /* We resume loop AFTER the end-of-line from
- this instruction. */
- }
- }
- continue;
- }
- /* Empty statement? */
- if (is_end_of_line[(unsigned char) next_char])
- continue;
- if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) && ISDIGIT (next_char))
- {
- /* local label ("4:") */
- char *backup = input_line_pointer;
- HANDLE_CONDITIONAL_ASSEMBLY (1);
- temp = next_char - '0';
- if (nul_char == '"')
- ++ input_line_pointer;
- /* Read the whole number. */
- while (ISDIGIT (*input_line_pointer))
- {
- const long digit = *input_line_pointer - '0';
- if (temp > (INT_MAX - digit) / 10)
- {
- as_bad (_("local label too large near %s"), backup);
- temp = -1;
- break;
- }
- temp = temp * 10 + digit;
- ++input_line_pointer;
- }
- /* Overflow: stop processing the label. */
- if (temp == -1)
- {
- ignore_rest_of_line ();
- continue;
- }
- if (LOCAL_LABELS_DOLLAR
- && *input_line_pointer == '$'
- && *(input_line_pointer + 1) == ':')
- {
- input_line_pointer += 2;
- if (dollar_label_defined (temp))
- {
- as_fatal (_("label \"%ld$\" redefined"), temp);
- }
- define_dollar_label (temp);
- colon (dollar_label_name (temp, 0));
- continue;
- }
- if (LOCAL_LABELS_FB
- && *input_line_pointer++ == ':')
- {
- fb_label_instance_inc (temp);
- colon (fb_label_name (temp, 0));
- continue;
- }
- input_line_pointer = backup;
- }
- if (next_char && strchr (line_comment_chars, next_char))
- { /* Its a comment. Better say APP or NO_APP. */
- sb sbuf;
- char *ends;
- char *new_buf;
- char *new_tmp;
- unsigned int new_length;
- char *tmp_buf = 0;
- s = input_line_pointer;
- if (!startswith (s, "APP\n"))
- {
- /* We ignore it. */
- ignore_rest_of_line ();
- continue;
- }
- bump_line_counters ();
- s += 4;
- ends = strstr (s, "#NO_APP\n");
- if (!ends)
- {
- unsigned int tmp_len;
- unsigned int num;
- /* The end of the #APP wasn't in this buffer. We
- keep reading in buffers until we find the #NO_APP
- that goes with this #APP There is one. The specs
- guarantee it... */
- tmp_len = buffer_limit - s;
- tmp_buf = XNEWVEC (char, tmp_len + 1);
- memcpy (tmp_buf, s, tmp_len);
- do
- {
- new_tmp = input_scrub_next_buffer (&buffer);
- if (!new_tmp)
- break;
- else
- buffer_limit = new_tmp;
- input_line_pointer = buffer;
- ends = strstr (buffer, "#NO_APP\n");
- if (ends)
- num = ends - buffer;
- else
- num = buffer_limit - buffer;
- tmp_buf = XRESIZEVEC (char, tmp_buf, tmp_len + num);
- memcpy (tmp_buf + tmp_len, buffer, num);
- tmp_len += num;
- }
- while (!ends);
- input_line_pointer = ends ? ends + 8 : NULL;
- s = tmp_buf;
- ends = s + tmp_len;
- }
- else
- {
- input_line_pointer = ends + 8;
- }
- scrub_string = s;
- scrub_string_end = ends;
- new_length = ends - s;
- new_buf = XNEWVEC (char, new_length);
- new_tmp = new_buf;
- for (;;)
- {
- size_t space;
- size_t size;
- space = (new_buf + new_length) - new_tmp;
- size = do_scrub_chars (scrub_from_string, new_tmp, space);
- if (size < space)
- {
- new_tmp[size] = 0;
- new_length = new_tmp + size - new_buf;
- break;
- }
- new_buf = XRESIZEVEC (char, new_buf, new_length + 100);
- new_tmp = new_buf + new_length;
- new_length += 100;
- }
- free (tmp_buf);
- /* We've "scrubbed" input to the preferred format. In the
- process we may have consumed the whole of the remaining
- file (and included files). We handle this formatted
- input similar to that of macro expansion, letting
- actual macro expansion (possibly nested) and other
- input expansion work. Beware that in messages, line
- numbers and possibly file names will be incorrect. */
- sb_build (&sbuf, new_length);
- sb_add_buffer (&sbuf, new_buf, new_length);
- input_scrub_include_sb (&sbuf, input_line_pointer, 0);
- sb_kill (&sbuf);
- buffer_limit = input_scrub_next_buffer (&input_line_pointer);
- free (new_buf);
- continue;
- }
- HANDLE_CONDITIONAL_ASSEMBLY (1);
- #ifdef tc_unrecognized_line
- if (tc_unrecognized_line (next_char))
- continue;
- #endif
- input_line_pointer--;
- /* Report unknown char as error. */
- demand_empty_rest_of_line ();
- }
- }
- quit:
- symbol_set_value_now (&dot_symbol);
- #ifdef HANDLE_BUNDLE
- if (bundle_lock_frag != NULL)
- {
- as_bad_where (bundle_lock_frag->fr_file, bundle_lock_frag->fr_line,
- _(".bundle_lock with no matching .bundle_unlock"));
- bundle_lock_frag = NULL;
- bundle_lock_frchain = NULL;
- bundle_lock_depth = 0;
- }
- #endif
- #ifdef md_cleanup
- md_cleanup ();
- #endif
- /* Close the input file. */
- input_scrub_close ();
- #ifdef WARN_COMMENTS
- {
- if (warn_comment && found_comment)
- as_warn_where (found_comment_file, found_comment,
- "first comment found here");
- }
- #endif
- }
- /* Convert O_constant expression EXP into the equivalent O_big representation.
- Take the sign of the number from SIGN rather than X_add_number. */
- static void
- convert_to_bignum (expressionS *exp, int sign)
- {
- valueT value;
- unsigned int i;
- value = exp->X_add_number;
- for (i = 0; i < sizeof (exp->X_add_number) / CHARS_PER_LITTLENUM; i++)
- {
- generic_bignum[i] = value & LITTLENUM_MASK;
- value >>= LITTLENUM_NUMBER_OF_BITS;
- }
- /* Add a sequence of sign bits if the top bit of X_add_number is not
- the sign of the original value. */
- if ((exp->X_add_number < 0) == !sign)
- generic_bignum[i++] = sign ? LITTLENUM_MASK : 0;
- exp->X_op = O_big;
- exp->X_add_number = i;
- }
- /* For most MRI pseudo-ops, the line actually ends at the first
- nonquoted space. This function looks for that point, stuffs a null
- in, and sets *STOPCP to the character that used to be there, and
- returns the location.
- Until I hear otherwise, I am going to assume that this is only true
- for the m68k MRI assembler. */
- char *
- mri_comment_field (char *stopcp)
- {
- char *s;
- #ifdef TC_M68K
- int inquote = 0;
- know (flag_m68k_mri);
- for (s = input_line_pointer;
- ((!is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t')
- || inquote);
- s++)
- {
- if (*s == '\'')
- inquote = !inquote;
- }
- #else
- for (s = input_line_pointer;
- !is_end_of_line[(unsigned char) *s];
- s++)
- ;
- #endif
- *stopcp = *s;
- *s = '\0';
- return s;
- }
- /* Skip to the end of an MRI comment field. */
- void
- mri_comment_end (char *stop, int stopc)
- {
- know (flag_mri);
- input_line_pointer = stop;
- *stop = stopc;
- while (!is_end_of_line[(unsigned char) *input_line_pointer])
- ++input_line_pointer;
- }
- void
- s_abort (int ignore ATTRIBUTE_UNUSED)
- {
- as_fatal (_(".abort detected. Abandoning ship."));
- }
- /* Handle the .align pseudo-op. A positive ARG is a default alignment
- (in bytes). A negative ARG is the negative of the length of the
- fill pattern. BYTES_P is non-zero if the alignment value should be
- interpreted as the byte boundary, rather than the power of 2. */
- #ifndef TC_ALIGN_LIMIT
- #define TC_ALIGN_LIMIT (stdoutput->arch_info->bits_per_address - 1)
- #endif
- static void
- s_align (signed int arg, int bytes_p)
- {
- unsigned int align_limit = TC_ALIGN_LIMIT;
- addressT align;
- char *stop = NULL;
- char stopc = 0;
- offsetT fill = 0;
- unsigned int max;
- int fill_p;
- if (flag_mri)
- stop = mri_comment_field (&stopc);
- if (is_end_of_line[(unsigned char) *input_line_pointer])
- {
- if (arg < 0)
- align = 0;
- else
- align = arg; /* Default value from pseudo-op table. */
- }
- else
- {
- align = get_absolute_expression ();
- SKIP_WHITESPACE ();
- #ifdef TC_ALIGN_ZERO_IS_DEFAULT
- if (arg > 0 && align == 0)
- align = arg;
- #endif
- }
- if (bytes_p)
- {
- /* Convert to a power of 2. */
- if (align != 0)
- {
- unsigned int i;
- for (i = 0; (align & 1) == 0; align >>= 1, ++i)
- ;
- if (align != 1)
- as_bad (_("alignment not a power of 2"));
- align = i;
- }
- }
- if (align > align_limit)
- {
- align = align_limit;
- as_warn (_("alignment too large: %u assumed"), align_limit);
- }
- if (*input_line_pointer != ',')
- {
- fill_p = 0;
- max = 0;
- }
- else
- {
- ++input_line_pointer;
- if (*input_line_pointer == ',')
- fill_p = 0;
- else
- {
- fill = get_absolute_expression ();
- SKIP_WHITESPACE ();
- fill_p = 1;
- }
- if (*input_line_pointer != ',')
- max = 0;
- else
- {
- ++input_line_pointer;
- max = get_absolute_expression ();
- }
- }
- if (!fill_p)
- {
- if (arg < 0)
- as_warn (_("expected fill pattern missing"));
- do_align (align, (char *) NULL, 0, max);
- }
- else
- {
- unsigned int fill_len;
- if (arg >= 0)
- fill_len = 1;
- else
- fill_len = -arg;
- if (fill_len <= 1)
- {
- char fill_char = 0;
- fill_char = fill;
- do_align (align, &fill_char, fill_len, max);
- }
- else
- {
- char ab[16];
- if ((size_t) fill_len > sizeof ab)
- {
- as_warn (_("fill pattern too long, truncating to %u"),
- (unsigned) sizeof ab);
- fill_len = sizeof ab;
- }
- md_number_to_chars (ab, fill, fill_len);
- do_align (align, ab, fill_len, max);
- }
- }
- demand_empty_rest_of_line ();
- if (flag_mri)
- mri_comment_end (stop, stopc);
- }
- /* Handle the .align pseudo-op on machines where ".align 4" means
- align to a 4 byte boundary. */
- void
- s_align_bytes (int arg)
- {
- s_align (arg, 1);
- }
- /* Handle the .align pseudo-op on machines where ".align 4" means align
- to a 2**4 boundary. */
- void
- s_align_ptwo (int arg)
- {
- s_align (arg, 0);
- }
- /* Switch in and out of alternate macro mode. */
- static void
- s_altmacro (int on)
- {
- demand_empty_rest_of_line ();
- macro_set_alternate (on);
- }
- /* Read a symbol name from input_line_pointer.
- Stores the symbol name in a buffer and returns a pointer to this buffer.
- The buffer is xalloc'ed. It is the caller's responsibility to free
- this buffer.
- The name is not left in the i_l_p buffer as it may need processing
- to handle escape characters.
- Advances i_l_p to the next non-whitespace character.
- If a symbol name could not be read, the routine issues an error
- messages, skips to the end of the line and returns NULL. */
- char *
- read_symbol_name (void)
- {
- char * name;
- char * start;
- char c;
- c = *input_line_pointer++;
- if (c == '"')
- {
- #define SYM_NAME_CHUNK_LEN 128
- ptrdiff_t len = SYM_NAME_CHUNK_LEN;
- char * name_end;
- unsigned int C;
- start = name = XNEWVEC (char, len + 1);
- name_end = name + SYM_NAME_CHUNK_LEN;
- while (is_a_char (C = next_char_of_string ()))
- {
- if (name >= name_end)
- {
- ptrdiff_t sofar;
- sofar = name - start;
- len += SYM_NAME_CHUNK_LEN;
- start = XRESIZEVEC (char, start, len + 1);
- name_end = start + len;
- name = start + sofar;
- }
- *name++ = (char) C;
- }
- *name = 0;
- /* Since quoted symbol names can contain non-ASCII characters,
- check the string and warn if it cannot be recognised by the
- current character set. */
- if (mbstowcs (NULL, name, len) == (size_t) -1)
- as_warn (_("symbol name not recognised in the current locale"));
- }
- else if (is_name_beginner (c) || (input_from_string && c == FAKE_LABEL_CHAR))
- {
- ptrdiff_t len;
- name = input_line_pointer - 1;
- /* We accept FAKE_LABEL_CHAR in a name in case this is
- being called with a constructed string. */
- while (is_part_of_name (c = *input_line_pointer++)
- || (input_from_string && c == FAKE_LABEL_CHAR))
- ;
- len = (input_line_pointer - name) - 1;
- start = XNEWVEC (char, len + 1);
- memcpy (start, name, len);
- start[len] = 0;
- /* Skip a name ender char if one is present. */
- if (! is_name_ender (c))
- --input_line_pointer;
- }
- else
- name = start = NULL;
- if (name == start)
- {
- as_bad (_("expected symbol name"));
- ignore_rest_of_line ();
- return NULL;
- }
- SKIP_WHITESPACE ();
- return start;
- }
- symbolS *
- s_comm_internal (int param,
- symbolS *(*comm_parse_extra) (int, symbolS *, addressT))
- {
- char *name;
- offsetT temp, size;
- symbolS *symbolP = NULL;
- char *stop = NULL;
- char stopc = 0;
- expressionS exp;
- if (flag_mri)
- stop = mri_comment_field (&stopc);
- if ((name = read_symbol_name ()) == NULL)
- goto out;
- /* Accept an optional comma after the name. The comma used to be
- required, but Irix 5 cc does not generate it for .lcomm. */
- if (*input_line_pointer == ',')
- input_line_pointer++;
- temp = get_absolute_expr (&exp);
- size = temp;
- size &= ((addressT) 2 << (stdoutput->arch_info->bits_per_address - 1)) - 1;
- if (exp.X_op == O_absent)
- {
- as_bad (_("missing size expression"));
- ignore_rest_of_line ();
- goto out;
- }
- else if (temp != size || !exp.X_unsigned)
- {
- as_warn (_("size (%ld) out of range, ignored"), (long) temp);
- ignore_rest_of_line ();
- goto out;
- }
- symbolP = symbol_find_or_make (name);
- if ((S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
- && !S_IS_COMMON (symbolP))
- {
- if (!S_IS_VOLATILE (symbolP))
- {
- symbolP = NULL;
- as_bad (_("symbol `%s' is already defined"), name);
- ignore_rest_of_line ();
- goto out;
- }
- symbolP = symbol_clone (symbolP, 1);
- S_SET_SEGMENT (symbolP, undefined_section);
- S_SET_VALUE (symbolP, 0);
- symbol_set_frag (symbolP, &zero_address_frag);
- S_CLEAR_VOLATILE (symbolP);
- }
- size = S_GET_VALUE (symbolP);
- if (size == 0)
- size = temp;
- else if (size != temp)
- as_warn (_("size of \"%s\" is already %ld; not changing to %ld"),
- name, (long) size, (long) temp);
- if (comm_parse_extra != NULL)
- symbolP = (*comm_parse_extra) (param, symbolP, size);
- else
- {
- S_SET_VALUE (symbolP, (valueT) size);
- S_SET_EXTERNAL (symbolP);
- S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
- }
- demand_empty_rest_of_line ();
- out:
- if (flag_mri)
- mri_comment_end (stop, stopc);
- free (name);
- return symbolP;
- }
- void
- s_comm (int ignore)
- {
- s_comm_internal (ignore, NULL);
- }
- /* The MRI COMMON pseudo-op. We handle this by creating a common
- symbol with the appropriate name. We make s_space do the right
- thing by increasing the size. */
- void
- s_mri_common (int small ATTRIBUTE_UNUSED)
- {
- char *name;
- char c;
- char *alc = NULL;
- symbolS *sym;
- offsetT align;
- char *stop = NULL;
- char stopc = 0;
- if (!flag_mri)
- {
- s_comm (0);
- return;
- }
- stop = mri_comment_field (&stopc);
- SKIP_WHITESPACE ();
- name = input_line_pointer;
- if (!ISDIGIT (*name))
- c = get_symbol_name (& name);
- else
- {
- do
- {
- ++input_line_pointer;
- }
- while (ISDIGIT (*input_line_pointer));
- c = *input_line_pointer;
- *input_line_pointer = '\0';
- if (line_label != NULL)
- {
- alc = XNEWVEC (char, strlen (S_GET_NAME (line_label))
- + (input_line_pointer - name) + 1);
- sprintf (alc, "%s%s", name, S_GET_NAME (line_label));
- name = alc;
- }
- }
- sym = symbol_find_or_make (name);
- c = restore_line_pointer (c);
- free (alc);
- if (*input_line_pointer != ',')
- align = 0;
- else
- {
- ++input_line_pointer;
- align = get_absolute_expression ();
- }
- if (S_IS_DEFINED (sym) && !S_IS_COMMON (sym))
- {
- as_bad (_("symbol `%s' is already defined"), S_GET_NAME (sym));
- mri_comment_end (stop, stopc);
- return;
- }
- S_SET_EXTERNAL (sym);
- S_SET_SEGMENT (sym, bfd_com_section_ptr);
- mri_common_symbol = sym;
- #ifdef S_SET_ALIGN
- if (align != 0)
- S_SET_ALIGN (sym, align);
- #else
- (void) align;
- #endif
- if (line_label != NULL)
- {
- expressionS exp;
- exp.X_op = O_symbol;
- exp.X_add_symbol = sym;
- exp.X_add_number = 0;
- symbol_set_value_expression (line_label, &exp);
- symbol_set_frag (line_label, &zero_address_frag);
- S_SET_SEGMENT (line_label, expr_section);
- }
- /* FIXME: We just ignore the small argument, which distinguishes
- COMMON and COMMON.S. I don't know what we can do about it. */
- /* Ignore the type and hptype. */
- if (*input_line_pointer == ',')
- input_line_pointer += 2;
- if (*input_line_pointer == ',')
- input_line_pointer += 2;
- demand_empty_rest_of_line ();
- mri_comment_end (stop, stopc);
- }
- void
- s_data (int ignore ATTRIBUTE_UNUSED)
- {
- segT section;
- int temp;
- temp = get_absolute_expression ();
- if (flag_readonly_data_in_text)
- {
- section = text_section;
- temp += 1000;
- }
- else
- section = data_section;
- subseg_set (section, (subsegT) temp);
- demand_empty_rest_of_line ();
- }
- /* Handle the .appfile pseudo-op. This is automatically generated by
- do_scrub_chars when a preprocessor # line comment is seen with a
- file name. This default definition may be overridden by the object
- or CPU specific pseudo-ops. This function is also the default
- definition for .file; the APPFILE argument is 1 for .appfile, 0 for
- .file. */
- void
- s_app_file_string (char *file, int appfile ATTRIBUTE_UNUSED)
- {
- #ifdef LISTING
- if (listing)
- listing_source_file (file);
- #endif
- register_dependency (file);
- #ifdef obj_app_file
- obj_app_file (file, appfile);
- #endif
- }
- void
- s_app_file (int appfile)
- {
- char *s;
- int length;
- /* Some assemblers tolerate immediately following '"'. */
- if ((s = demand_copy_string (&length)) != 0)
- {
- int may_omit
- = (!new_logical_line_flags (s, -1, 1) && appfile);
- /* In MRI mode, the preprocessor may have inserted an extraneous
- backquote. */
- if (flag_m68k_mri
- && *input_line_pointer == '\''
- && is_end_of_line[(unsigned char) input_line_pointer[1]])
- ++input_line_pointer;
- demand_empty_rest_of_line ();
- if (!may_omit)
- s_app_file_string (s, appfile);
- }
- }
- static int
- get_linefile_number (int *flag)
- {
- SKIP_WHITESPACE ();
- if (*input_line_pointer < '0' || *input_line_pointer > '9')
- return 0;
- *flag = get_absolute_expression ();
- return 1;
- }
- /* Handle the .appline pseudo-op. This is automatically generated by
- do_scrub_chars when a preprocessor # line comment is seen. This
- default definition may be overridden by the object or CPU specific
- pseudo-ops. */
- void
- s_app_line (int appline)
- {
- char *file = NULL;
- int linenum;
- /* The given number is that of the next line. */
- if (appline)
- linenum = get_absolute_expression ();
- else if (!get_linefile_number (&linenum))
- {
- ignore_rest_of_line ();
- return;
- }
- if (linenum < 0)
- /* Some of the back ends can't deal with non-positive line numbers.
- Besides, it's silly. GCC however will generate a line number of
- zero when it is pre-processing builtins for assembler-with-cpp files:
- # 0 "<built-in>"
- We do not want to barf on this, especially since such files are used
- in the GCC and GDB testsuites. So we check for negative line numbers
- rather than non-positive line numbers. */
- as_warn (_("line numbers must be positive; line number %d rejected"),
- linenum);
- else
- {
- int flags = 0;
- int length = 0;
- if (!appline)
- {
- SKIP_WHITESPACE ();
- if (*input_line_pointer == '"')
- file = demand_copy_string (&length);
- if (file)
- {
- int this_flag;
- while (get_linefile_number (&this_flag))
- switch (this_flag)
- {
- /* From GCC's cpp documentation:
- 1: start of a new file.
- 2: returning to a file after having included
- another file.
- 3: following text comes from a system header file.
- 4: following text should be treated as extern "C".
- 4 is nonsensical for the assembler; 3, we don't
- care about, so we ignore it just in case a
- system header file is included while
- preprocessing assembly. So 1 and 2 are all we
- care about, and they are mutually incompatible.
- new_logical_line_flags() demands this. */
- case 1:
- case 2:
- if (flags && flags != (1 << this_flag))
- as_warn (_("incompatible flag %i in line directive"),
- this_flag);
- else
- flags |= 1 << this_flag;
- break;
- case 3:
- case 4:
- /* We ignore these. */
- break;
- default:
- as_warn (_("unsupported flag %i in line directive"),
- this_flag);
- break;
- }
- if (!is_end_of_line[(unsigned char)*input_line_pointer])
- file = 0;
- }
- }
- if (appline || file)
- {
- linenum--;
- new_logical_line_flags (file, linenum, flags);
- #ifdef LISTING
- if (listing)
- listing_source_line (linenum);
- #endif
- }
- }
- if (appline || file)
- demand_empty_rest_of_line ();
- else
- ignore_rest_of_line ();
- }
- /* Handle the .end pseudo-op. Actually, the real work is done in
- read_a_source_file. */
- void
- s_end (int ignore ATTRIBUTE_UNUSED)
- {
- if (flag_mri)
- {
- /* The MRI assembler permits the start symbol to follow .end,
- but we don't support that. */
- SKIP_WHITESPACE ();
- if (!is_end_of_line[(unsigned char) *input_line_pointer]
- && *input_line_pointer != '*'
- && *input_line_pointer != '!')
- as_warn (_("start address not supported"));
- }
- }
- /* Handle the .err pseudo-op. */
- void
- s_err (int ignore ATTRIBUTE_UNUSED)
- {
- as_bad (_(".err encountered"));
- demand_empty_rest_of_line ();
- }
- /* Handle the .error and .warning pseudo-ops. */
- void
- s_errwarn (int err)
- {
- int len;
- /* The purpose for the conditional assignment is not to
- internationalize the directive itself, but that we need a
- self-contained message, one that can be passed like the
- demand_copy_C_string return value, and with no assumption on the
- location of the name of the directive within the message. */
- const char *msg
- = (err ? _(".error directive invoked in source file")
- : _(".warning directive invoked in source file"));
- if (!is_it_end_of_statement ())
- {
- if (*input_line_pointer != '\"')
- {
- as_bad (_("%s argument must be a string"),
- err ? ".error" : ".warning");
- ignore_rest_of_line ();
- return;
- }
- msg = demand_copy_C_string (&len);
- if (msg == NULL)
- return;
- }
- if (err)
- as_bad ("%s", msg);
- else
- as_warn ("%s", msg);
- demand_empty_rest_of_line ();
- }
- /* Handle the MRI fail pseudo-op. */
- void
- s_fail (int ignore ATTRIBUTE_UNUSED)
- {
- offsetT temp;
- char *stop = NULL;
- char stopc = 0;
- if (flag_mri)
- stop = mri_comment_field (&stopc);
- temp = get_absolute_expression ();
- if (temp >= 500)
- as_warn (_(".fail %ld encountered"), (long) temp);
- else
- as_bad (_(".fail %ld encountered"), (long) temp);
- demand_empty_rest_of_line ();
- if (flag_mri)
- mri_comment_end (stop, stopc);
- }
- void
- s_fill (int ignore ATTRIBUTE_UNUSED)
- {
- expressionS rep_exp;
- long size = 1;
- long fill = 0;
- char *p;
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- #ifdef md_cons_align
- md_cons_align (1);
- #endif
- expression (&rep_exp);
- if (*input_line_pointer == ',')
- {
- input_line_pointer++;
- size = get_absolute_expression ();
- if (*input_line_pointer == ',')
- {
- input_line_pointer++;
- fill = get_absolute_expression ();
- }
- }
- /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */
- #define BSD_FILL_SIZE_CROCK_8 (8)
- if (size > BSD_FILL_SIZE_CROCK_8)
- {
- as_warn (_(".fill size clamped to %d"), BSD_FILL_SIZE_CROCK_8);
- size = BSD_FILL_SIZE_CROCK_8;
- }
- if (size < 0)
- {
- as_warn (_("size negative; .fill ignored"));
- size = 0;
- }
- else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0)
- {
- if (rep_exp.X_add_number < 0)
- as_warn (_("repeat < 0; .fill ignored"));
- size = 0;
- }
- if (size && !need_pass_2)
- {
- if (now_seg == absolute_section)
- {
- if (rep_exp.X_op != O_constant)
- as_bad (_("non-constant fill count for absolute section"));
- else if (fill && rep_exp.X_add_number != 0)
- as_bad (_("attempt to fill absolute section with non-zero value"));
- abs_section_offset += rep_exp.X_add_number * size;
- }
- else if (fill
- && (rep_exp.X_op != O_constant || rep_exp.X_add_number != 0)
- && in_bss ())
- as_bad (_("attempt to fill section `%s' with non-zero value"),
- segment_name (now_seg));
- if (rep_exp.X_op == O_constant)
- {
- p = frag_var (rs_fill, (int) size, (int) size,
- (relax_substateT) 0, (symbolS *) 0,
- (offsetT) rep_exp.X_add_number,
- (char *) 0);
- }
- else
- {
- /* We don't have a constant repeat count, so we can't use
- rs_fill. We can get the same results out of rs_space,
- but its argument is in bytes, so we must multiply the
- repeat count by size. */
- symbolS *rep_sym;
- rep_sym = make_expr_symbol (&rep_exp);
- if (size != 1)
- {
- expressionS size_exp;
- size_exp.X_op = O_constant;
- size_exp.X_add_number = size;
- rep_exp.X_op = O_multiply;
- rep_exp.X_add_symbol = rep_sym;
- rep_exp.X_op_symbol = make_expr_symbol (&size_exp);
- rep_exp.X_add_number = 0;
- rep_sym = make_expr_symbol (&rep_exp);
- }
- p = frag_var (rs_space, (int) size, (int) size,
- (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0);
- }
- memset (p, 0, (unsigned int) size);
- /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX
- flavoured AS. The following bizarre behaviour is to be
- compatible with above. I guess they tried to take up to 8
- bytes from a 4-byte expression and they forgot to sign
- extend. */
- #define BSD_FILL_SIZE_CROCK_4 (4)
- md_number_to_chars (p, (valueT) fill,
- (size > BSD_FILL_SIZE_CROCK_4
- ? BSD_FILL_SIZE_CROCK_4
- : (int) size));
- /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes)
- but emits no error message because it seems a legal thing to do.
- It is a degenerate case of .fill but could be emitted by a
- compiler. */
- }
- demand_empty_rest_of_line ();
- }
- void
- s_globl (int ignore ATTRIBUTE_UNUSED)
- {
- char *name;
- int c;
- symbolS *symbolP;
- char *stop = NULL;
- char stopc = 0;
- if (flag_mri)
- stop = mri_comment_field (&stopc);
- do
- {
- if ((name = read_symbol_name ()) == NULL)
- return;
- symbolP = symbol_find_or_make (name);
- S_SET_EXTERNAL (symbolP);
- SKIP_WHITESPACE ();
- c = *input_line_pointer;
- if (c == ',')
- {
- input_line_pointer++;
- SKIP_WHITESPACE ();
- if (is_end_of_line[(unsigned char) *input_line_pointer])
- c = '\n';
- }
- free (name);
- }
- while (c == ',');
- demand_empty_rest_of_line ();
- if (flag_mri)
- mri_comment_end (stop, stopc);
- }
- /* Handle the MRI IRP and IRPC pseudo-ops. */
- void
- s_irp (int irpc)
- {
- char * eol;
- const char * file;
- unsigned int line;
- sb s;
- const char *err;
- sb out;
- file = as_where (&line);
- eol = find_end_of_line (input_line_pointer, 0);
- sb_build (&s, eol - input_line_pointer);
- sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
- input_line_pointer = eol;
- sb_new (&out);
- err = expand_irp (irpc, 0, &s, &out, get_non_macro_line_sb);
- if (err != NULL)
- as_bad_where (file, line, "%s", err);
- sb_kill (&s);
- input_scrub_include_sb (&out, input_line_pointer, 1);
- sb_kill (&out);
- buffer_limit = input_scrub_next_buffer (&input_line_pointer);
- }
- /* Handle the .linkonce pseudo-op. This tells the assembler to mark
- the section to only be linked once. However, this is not supported
- by most object file formats. This takes an optional argument,
- which is what to do about duplicates. */
- void
- s_linkonce (int ignore ATTRIBUTE_UNUSED)
- {
- enum linkonce_type type;
- SKIP_WHITESPACE ();
- type = LINKONCE_DISCARD;
- if (!is_end_of_line[(unsigned char) *input_line_pointer])
- {
- char *s;
- char c;
- c = get_symbol_name (& s);
- if (strcasecmp (s, "discard") == 0)
- type = LINKONCE_DISCARD;
- else if (strcasecmp (s, "one_only") == 0)
- type = LINKONCE_ONE_ONLY;
- else if (strcasecmp (s, "same_size") == 0)
- type = LINKONCE_SAME_SIZE;
- else if (strcasecmp (s, "same_contents") == 0)
- type = LINKONCE_SAME_CONTENTS;
- else
- as_warn (_("unrecognized .linkonce type `%s'"), s);
- (void) restore_line_pointer (c);
- }
- #ifdef obj_handle_link_once
- obj_handle_link_once (type);
- #else /* ! defined (obj_handle_link_once) */
- {
- flagword flags;
- if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0)
- as_warn (_(".linkonce is not supported for this object file format"));
- flags = bfd_section_flags (now_seg);
- flags |= SEC_LINK_ONCE;
- switch (type)
- {
- default:
- abort ();
- case LINKONCE_DISCARD:
- flags |= SEC_LINK_DUPLICATES_DISCARD;
- break;
- case LINKONCE_ONE_ONLY:
- flags |= SEC_LINK_DUPLICATES_ONE_ONLY;
- break;
- case LINKONCE_SAME_SIZE:
- flags |= SEC_LINK_DUPLICATES_SAME_SIZE;
- break;
- case LINKONCE_SAME_CONTENTS:
- flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS;
- break;
- }
- if (!bfd_set_section_flags (now_seg, flags))
- as_bad (_("bfd_set_section_flags: %s"),
- bfd_errmsg (bfd_get_error ()));
- }
- #endif /* ! defined (obj_handle_link_once) */
- demand_empty_rest_of_line ();
- }
- void
- bss_alloc (symbolS *symbolP, addressT size, unsigned int align)
- {
- char *pfrag;
- segT current_seg = now_seg;
- subsegT current_subseg = now_subseg;
- segT bss_seg = bss_section;
- #if defined (TC_MIPS) || defined (TC_ALPHA)
- if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour
- || OUTPUT_FLAVOR == bfd_target_elf_flavour)
- {
- /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */
- if (size <= bfd_get_gp_size (stdoutput))
- {
- bss_seg = subseg_new (".sbss", 1);
- seg_info (bss_seg)->bss = 1;
- if (!bfd_set_section_flags (bss_seg, SEC_ALLOC | SEC_SMALL_DATA))
- as_warn (_("error setting flags for \".sbss\": %s"),
- bfd_errmsg (bfd_get_error ()));
- }
- }
- #endif
- subseg_set (bss_seg, 1);
- if (align > OCTETS_PER_BYTE_POWER)
- {
- record_alignment (bss_seg, align);
- frag_align (align, 0, 0);
- }
- /* Detach from old frag. */
- if (S_GET_SEGMENT (symbolP) == bss_seg)
- symbol_get_frag (symbolP)->fr_symbol = NULL;
- symbol_set_frag (symbolP, frag_now);
- pfrag = frag_var (rs_org, 1, 1, 0, symbolP, size * OCTETS_PER_BYTE, NULL);
- *pfrag = 0;
- #ifdef S_SET_SIZE
- S_SET_SIZE (symbolP, size);
- #endif
- S_SET_SEGMENT (symbolP, bss_seg);
- #ifdef OBJ_COFF
- /* The symbol may already have been created with a preceding
- ".globl" directive -- be careful not to step on storage class
- in that case. Otherwise, set it to static. */
- if (S_GET_STORAGE_CLASS (symbolP) != C_EXT)
- S_SET_STORAGE_CLASS (symbolP, C_STAT);
- #endif /* OBJ_COFF */
- subseg_set (current_seg, current_subseg);
- }
- offsetT
- parse_align (int align_bytes)
- {
- expressionS exp;
- addressT align;
- SKIP_WHITESPACE ();
- if (*input_line_pointer != ',')
- {
- no_align:
- as_bad (_("expected alignment after size"));
- ignore_rest_of_line ();
- return -1;
- }
- input_line_pointer++;
- SKIP_WHITESPACE ();
- align = get_absolute_expr (&exp);
- if (exp.X_op == O_absent)
- goto no_align;
- if (!exp.X_unsigned)
- {
- as_warn (_("alignment negative; 0 assumed"));
- align = 0;
- }
- if (align_bytes && align != 0)
- {
- /* convert to a power of 2 alignment */
- unsigned int alignp2 = 0;
- while ((align & 1) == 0)
- align >>= 1, ++alignp2;
- if (align != 1)
- {
- as_bad (_("alignment not a power of 2"));
- ignore_rest_of_line ();
- return -1;
- }
- align = alignp2;
- }
- return align;
- }
- /* Called from s_comm_internal after symbol name and size have been
- parsed. NEEDS_ALIGN is 0 if it was an ".lcomm" (2 args only),
- 1 if this was a ".bss" directive which has a 3rd argument
- (alignment as a power of 2), or 2 if this was a ".bss" directive
- with alignment in bytes. */
- symbolS *
- s_lcomm_internal (int needs_align, symbolS *symbolP, addressT size)
- {
- addressT align = 0;
- if (needs_align)
- {
- align = parse_align (needs_align - 1);
- if (align == (addressT) -1)
- return NULL;
- }
- else
- /* Assume some objects may require alignment on some systems. */
- TC_IMPLICIT_LCOMM_ALIGNMENT (size, align);
- bss_alloc (symbolP, size, align);
- return symbolP;
- }
- void
- s_lcomm (int needs_align)
- {
- s_comm_internal (needs_align, s_lcomm_internal);
- }
- void
- s_lcomm_bytes (int needs_align)
- {
- s_comm_internal (needs_align * 2, s_lcomm_internal);
- }
- void
- s_lsym (int ignore ATTRIBUTE_UNUSED)
- {
- char *name;
- expressionS exp;
- symbolS *symbolP;
- /* We permit ANY defined expression: BSD4.2 demands constants. */
- if ((name = read_symbol_name ()) == NULL)
- return;
- if (*input_line_pointer != ',')
- {
- as_bad (_("expected comma after \"%s\""), name);
- goto err_out;
- }
- input_line_pointer++;
- expression_and_evaluate (&exp);
- if (exp.X_op != O_constant
- && exp.X_op != O_register)
- {
- as_bad (_("bad expression"));
- goto err_out;
- }
- symbolP = symbol_find_or_make (name);
- if (S_GET_SEGMENT (symbolP) == undefined_section)
- {
- /* The name might be an undefined .global symbol; be sure to
- keep the "external" bit. */
- S_SET_SEGMENT (symbolP,
- (exp.X_op == O_constant
- ? absolute_section
- : reg_section));
- S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
- }
- else
- {
- as_bad (_("symbol `%s' is already defined"), name);
- }
- demand_empty_rest_of_line ();
- free (name);
- return;
- err_out:
- ignore_rest_of_line ();
- free (name);
- return;
- }
- /* Read a line into an sb. Returns the character that ended the line
- or zero if there are no more lines. */
- static int
- get_line_sb (sb *line, int in_macro)
- {
- char *eol;
- if (input_line_pointer[-1] == '\n')
- bump_line_counters ();
- if (input_line_pointer >= buffer_limit)
- {
- buffer_limit = input_scrub_next_buffer (&input_line_pointer);
- if (buffer_limit == 0)
- return 0;
- }
- eol = _find_end_of_line (input_line_pointer, flag_m68k_mri, 0, in_macro);
- sb_add_buffer (line, input_line_pointer, eol - input_line_pointer);
- input_line_pointer = eol;
- /* Don't skip multiple end-of-line characters, because that breaks support
- for the IA-64 stop bit (;;) which looks like two consecutive end-of-line
- characters but isn't. Instead just skip one end of line character and
- return the character skipped so that the caller can re-insert it if
- necessary. */
- return *input_line_pointer++;
- }
- static size_t
- get_non_macro_line_sb (sb *line)
- {
- return get_line_sb (line, 0);
- }
- static size_t
- get_macro_line_sb (sb *line)
- {
- return get_line_sb (line, 1);
- }
- /* Define a macro. This is an interface to macro.c. */
- void
- s_macro (int ignore ATTRIBUTE_UNUSED)
- {
- char *eol;
- const char * file;
- unsigned int line;
- sb s;
- const char *err;
- const char *name;
- file = as_where (&line);
- eol = find_end_of_line (input_line_pointer, 0);
- sb_build (&s, eol - input_line_pointer);
- sb_add_buffer (&s, input_line_pointer, eol - input_line_pointer);
- input_line_pointer = eol;
- if (line_label != NULL)
- {
- sb label;
- size_t len;
- name = S_GET_NAME (line_label);
- len = strlen (name);
- sb_build (&label, len);
- sb_add_buffer (&label, name, len);
- err = define_macro (0, &s, &label, get_macro_line_sb, file, line, &name);
- sb_kill (&label);
- }
- else
- err = define_macro (0, &s, NULL, get_macro_line_sb, file, line, &name);
- if (err != NULL)
- as_bad_where (file, line, err, name);
- else
- {
- if (line_label != NULL)
- {
- S_SET_SEGMENT (line_label, absolute_section);
- S_SET_VALUE (line_label, 0);
- symbol_set_frag (line_label, &zero_address_frag);
- }
- if (((NO_PSEUDO_DOT || flag_m68k_mri)
- && po_entry_find (po_hash, name) != NULL)
- || (!flag_m68k_mri
- && *name == '.'
- && po_entry_find (po_hash, name + 1) != NULL))
- as_warn_where (file,
- line,
- _("attempt to redefine pseudo-op `%s' ignored"),
- name);
- }
- sb_kill (&s);
- }
- /* Handle the .mexit pseudo-op, which immediately exits a macro
- expansion. */
- void
- s_mexit (int ignore ATTRIBUTE_UNUSED)
- {
- if (macro_nest)
- {
- cond_exit_macro (macro_nest);
- buffer_limit = input_scrub_next_buffer (&input_line_pointer);
- }
- else
- as_warn (_("ignoring macro exit outside a macro definition."));
- }
- /* Switch in and out of MRI mode. */
- void
- s_mri (int ignore ATTRIBUTE_UNUSED)
- {
- int on;
- #ifdef MRI_MODE_CHANGE
- int old_flag;
- #endif
- on = get_absolute_expression ();
- #ifdef MRI_MODE_CHANGE
- old_flag = flag_mri;
- #endif
- if (on != 0)
- {
- flag_mri = 1;
- #ifdef TC_M68K
- flag_m68k_mri = 1;
- #endif
- macro_mri_mode (1);
- }
- else
- {
- flag_mri = 0;
- #ifdef TC_M68K
- flag_m68k_mri = 0;
- #endif
- macro_mri_mode (0);
- }
- /* Operator precedence changes in m68k MRI mode, so we need to
- update the operator rankings. */
- expr_set_precedence ();
- #ifdef MRI_MODE_CHANGE
- if (on != old_flag)
- MRI_MODE_CHANGE (on);
- #endif
- demand_empty_rest_of_line ();
- }
- /* Handle changing the location counter. */
- static void
- do_org (segT segment, expressionS *exp, int fill)
- {
- if (segment != now_seg
- && segment != absolute_section
- && segment != expr_section)
- as_bad (_("invalid segment \"%s\""), segment_name (segment));
- if (now_seg == absolute_section)
- {
- if (fill != 0)
- as_warn (_("ignoring fill value in absolute section"));
- if (exp->X_op != O_constant)
- {
- as_bad (_("only constant offsets supported in absolute section"));
- exp->X_add_number = 0;
- }
- abs_section_offset = exp->X_add_number;
- }
- else
- {
- char *p;
- symbolS *sym = exp->X_add_symbol;
- offsetT off = exp->X_add_number * OCTETS_PER_BYTE;
- if (fill && in_bss ())
- as_warn (_("ignoring fill value in section `%s'"),
- segment_name (now_seg));
- if (exp->X_op != O_constant && exp->X_op != O_symbol)
- {
- /* Handle complex expressions. */
- sym = make_expr_symbol (exp);
- off = 0;
- }
- p = frag_var (rs_org, 1, 1, (relax_substateT) 0, sym, off, (char *) 0);
- *p = fill;
- }
- }
- void
- s_org (int ignore ATTRIBUTE_UNUSED)
- {
- segT segment;
- expressionS exp;
- long temp_fill;
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- /* The m68k MRI assembler has a different meaning for .org. It
- means to create an absolute section at a given address. We can't
- support that--use a linker script instead. */
- if (flag_m68k_mri)
- {
- as_bad (_("MRI style ORG pseudo-op not supported"));
- ignore_rest_of_line ();
- return;
- }
- /* Don't believe the documentation of BSD 4.2 AS. There is no such
- thing as a sub-segment-relative origin. Any absolute origin is
- given a warning, then assumed to be segment-relative. Any
- segmented origin expression ("foo+42") had better be in the right
- segment or the .org is ignored.
- BSD 4.2 AS warns if you try to .org backwards. We cannot because
- we never know sub-segment sizes when we are reading code. BSD
- will crash trying to emit negative numbers of filler bytes in
- certain .orgs. We don't crash, but see as-write for that code.
- Don't make frag if need_pass_2==1. */
- segment = get_known_segmented_expression (&exp);
- if (*input_line_pointer == ',')
- {
- input_line_pointer++;
- temp_fill = get_absolute_expression ();
- }
- else
- temp_fill = 0;
- if (!need_pass_2)
- do_org (segment, &exp, temp_fill);
- demand_empty_rest_of_line ();
- }
- /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be
- called by the obj-format routine which handles section changing
- when in MRI mode. It will create a new section, and return it. It
- will set *TYPE to the section type: one of 'C' (code), 'D' (data),
- 'M' (mixed), or 'R' (romable). The flags will be set in the section. */
- void
- s_mri_sect (char *type ATTRIBUTE_UNUSED)
- {
- #ifdef TC_M68K
- char *name;
- char c;
- segT seg;
- SKIP_WHITESPACE ();
- name = input_line_pointer;
- if (!ISDIGIT (*name))
- c = get_symbol_name (& name);
- else
- {
- do
- {
- ++input_line_pointer;
- }
- while (ISDIGIT (*input_line_pointer));
- c = *input_line_pointer;
- *input_line_pointer = '\0';
- }
- name = xstrdup (name);
- c = restore_line_pointer (c);
- seg = subseg_new (name, 0);
- if (c == ',')
- {
- unsigned int align;
- ++input_line_pointer;
- align = get_absolute_expression ();
- record_alignment (seg, align);
- }
- *type = 'C';
- if (*input_line_pointer == ',')
- {
- c = *++input_line_pointer;
- c = TOUPPER (c);
- if (c == 'C' || c == 'D' || c == 'M' || c == 'R')
- *type = c;
- else
- as_bad (_("unrecognized section type"));
- ++input_line_pointer;
- {
- flagword flags;
- flags = SEC_NO_FLAGS;
- if (*type == 'C')
- flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE;
- else if (*type == 'D' || *type == 'M')
- flags = SEC_ALLOC | SEC_LOAD | SEC_DATA;
- else if (*type == 'R')
- flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM;
- if (flags != SEC_NO_FLAGS)
- {
- if (!bfd_set_section_flags (seg, flags))
- as_warn (_("error setting flags for \"%s\": %s"),
- bfd_section_name (seg),
- bfd_errmsg (bfd_get_error ()));
- }
- }
- }
- /* Ignore the HP type. */
- if (*input_line_pointer == ',')
- input_line_pointer += 2;
- demand_empty_rest_of_line ();
- #else /* ! TC_M68K */
- /* The MRI assembler seems to use different forms of .sect for
- different targets. */
- as_bad ("MRI mode not supported for this target");
- ignore_rest_of_line ();
- #endif /* ! TC_M68K */
- }
- /* Handle the .print pseudo-op. */
- void
- s_print (int ignore ATTRIBUTE_UNUSED)
- {
- char *s;
- int len;
- s = demand_copy_C_string (&len);
- if (s != NULL)
- printf ("%s\n", s);
- demand_empty_rest_of_line ();
- }
- /* Handle the .purgem pseudo-op. */
- void
- s_purgem (int ignore ATTRIBUTE_UNUSED)
- {
- if (is_it_end_of_statement ())
- {
- demand_empty_rest_of_line ();
- return;
- }
- do
- {
- char *name;
- char c;
- SKIP_WHITESPACE ();
- c = get_symbol_name (& name);
- delete_macro (name);
- *input_line_pointer = c;
- SKIP_WHITESPACE_AFTER_NAME ();
- }
- while (*input_line_pointer++ == ',');
- --input_line_pointer;
- demand_empty_rest_of_line ();
- }
- /* Handle the .endm/.endr pseudo-ops. */
- static void
- s_bad_end (int endr)
- {
- as_warn (_(".end%c encountered without preceding %s"),
- endr ? 'r' : 'm',
- endr ? ".rept, .irp, or .irpc" : ".macro");
- demand_empty_rest_of_line ();
- }
- /* Handle the .rept pseudo-op. */
- void
- s_rept (int ignore ATTRIBUTE_UNUSED)
- {
- size_t count;
- count = (size_t) get_absolute_expression ();
- do_repeat (count, "REPT", "ENDR");
- }
- /* This function provides a generic repeat block implementation. It allows
- different directives to be used as the start/end keys. */
- void
- do_repeat (size_t count, const char *start, const char *end)
- {
- sb one;
- sb many;
- if (((ssize_t) count) < 0)
- {
- as_bad (_("negative count for %s - ignored"), start);
- count = 0;
- }
- sb_new (&one);
- if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
- {
- as_bad (_("%s without %s"), start, end);
- return;
- }
- sb_build (&many, count * one.len);
- while (count-- > 0)
- sb_add_sb (&many, &one);
- sb_kill (&one);
- input_scrub_include_sb (&many, input_line_pointer, 1);
- sb_kill (&many);
- buffer_limit = input_scrub_next_buffer (&input_line_pointer);
- }
- /* Like do_repeat except that any text matching EXPANDER in the
- block is replaced by the iteration count. */
- void
- do_repeat_with_expander (size_t count,
- const char * start,
- const char * end,
- const char * expander)
- {
- sb one;
- sb many;
- if (((ssize_t) count) < 0)
- {
- as_bad (_("negative count for %s - ignored"), start);
- count = 0;
- }
- sb_new (&one);
- if (!buffer_and_nest (start, end, &one, get_non_macro_line_sb))
- {
- as_bad (_("%s without %s"), start, end);
- return;
- }
- sb_new (&many);
- if (expander != NULL && strstr (one.ptr, expander) != NULL)
- {
- while (count -- > 0)
- {
- int len;
- char * sub;
- sb processed;
- sb_build (& processed, one.len);
- sb_add_sb (& processed, & one);
- sub = strstr (processed.ptr, expander);
- len = sprintf (sub, "%lu", (unsigned long) count);
- gas_assert (len < 8);
- memmove (sub + len, sub + 8,
- processed.ptr + processed.len - (sub + 8));
- processed.len -= (8 - len);
- sb_add_sb (& many, & processed);
- sb_kill (& processed);
- }
- }
- else
- while (count-- > 0)
- sb_add_sb (&many, &one);
- sb_kill (&one);
- input_scrub_include_sb (&many, input_line_pointer, 1);
- sb_kill (&many);
- buffer_limit = input_scrub_next_buffer (&input_line_pointer);
- }
- /* Skip to end of current repeat loop; EXTRA indicates how many additional
- input buffers to skip. Assumes that conditionals preceding the loop end
- are properly nested.
- This function makes it easier to implement a premature "break" out of the
- loop. The EXTRA arg accounts for other buffers we might have inserted,
- such as line substitutions. */
- void
- end_repeat (int extra)
- {
- cond_exit_macro (macro_nest);
- while (extra-- >= 0)
- buffer_limit = input_scrub_next_buffer (&input_line_pointer);
- }
- static void
- assign_symbol (char *name, int mode)
- {
- symbolS *symbolP;
- if (name[0] == '.' && name[1] == '\0')
- {
- /* Turn '. = mumble' into a .org mumble. */
- segT segment;
- expressionS exp;
- segment = get_known_segmented_expression (&exp);
- if (!need_pass_2)
- do_org (segment, &exp, 0);
- return;
- }
- if ((symbolP = symbol_find (name)) == NULL
- && (symbolP = md_undefined_symbol (name)) == NULL)
- {
- symbolP = symbol_find_or_make (name);
- #ifndef NO_LISTING
- /* When doing symbol listings, play games with dummy fragments living
- outside the normal fragment chain to record the file and line info
- for this symbol. */
- if (listing & LISTING_SYMBOLS)
- {
- extern struct list_info_struct *listing_tail;
- fragS *dummy_frag = XCNEW (fragS);
- dummy_frag->line = listing_tail;
- dummy_frag->fr_symbol = symbolP;
- symbol_set_frag (symbolP, dummy_frag);
- }
- #endif
- #if defined (OBJ_COFF) && !defined (TE_PE)
- /* "set" symbols are local unless otherwise specified. */
- SF_SET_LOCAL (symbolP);
- #endif
- }
- if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
- {
- if ((mode != 0 || !S_IS_VOLATILE (symbolP))
- && !S_CAN_BE_REDEFINED (symbolP))
- {
- as_bad (_("symbol `%s' is already defined"), name);
- ignore_rest_of_line ();
- input_line_pointer--;
- return;
- }
- /* If the symbol is volatile, copy the symbol and replace the
- original with the copy, so that previous uses of the symbol will
- retain the value of the symbol at the point of use. */
- else if (S_IS_VOLATILE (symbolP))
- symbolP = symbol_clone (symbolP, 1);
- }
- if (mode == 0)
- S_SET_VOLATILE (symbolP);
- else if (mode < 0)
- S_SET_FORWARD_REF (symbolP);
- pseudo_set (symbolP);
- }
- /* Handle the .equ, .equiv, .eqv, and .set directives. If EQUIV is 1,
- then this is .equiv, and it is an error if the symbol is already
- defined. If EQUIV is -1, the symbol additionally is a forward
- reference. */
- void
- s_set (int equiv)
- {
- char *name;
- /* Especial apologies for the random logic:
- this just grew, and could be parsed much more simply!
- Dean in haste. */
- if ((name = read_symbol_name ()) == NULL)
- return;
- if (*input_line_pointer != ',')
- {
- as_bad (_("expected comma after \"%s\""), name);
- ignore_rest_of_line ();
- free (name);
- return;
- }
- input_line_pointer++;
- assign_symbol (name, equiv);
- demand_empty_rest_of_line ();
- free (name);
- }
- void
- s_space (int mult)
- {
- expressionS exp;
- expressionS val;
- char *p = 0;
- char *stop = NULL;
- char stopc = 0;
- int bytes;
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- switch (mult)
- {
- case 'x':
- #ifdef X_PRECISION
- # ifndef P_PRECISION
- # define P_PRECISION X_PRECISION
- # define P_PRECISION_PAD X_PRECISION_PAD
- # endif
- mult = (X_PRECISION + X_PRECISION_PAD) * sizeof (LITTLENUM_TYPE);
- if (!mult)
- #endif
- mult = 12;
- break;
- case 'p':
- #ifdef P_PRECISION
- mult = (P_PRECISION + P_PRECISION_PAD) * sizeof (LITTLENUM_TYPE);
- if (!mult)
- #endif
- mult = 12;
- break;
- }
- #ifdef md_cons_align
- md_cons_align (1);
- #endif
- if (flag_mri)
- stop = mri_comment_field (&stopc);
- /* In m68k MRI mode, we need to align to a word boundary, unless
- this is ds.b. */
- if (flag_m68k_mri && mult > 1)
- {
- if (now_seg == absolute_section)
- {
- abs_section_offset += abs_section_offset & 1;
- if (line_label != NULL)
- S_SET_VALUE (line_label, abs_section_offset);
- }
- else if (mri_common_symbol != NULL)
- {
- valueT mri_val;
- mri_val = S_GET_VALUE (mri_common_symbol);
- if ((mri_val & 1) != 0)
- {
- S_SET_VALUE (mri_common_symbol, mri_val + 1);
- if (line_label != NULL)
- {
- expressionS *symexp;
- symexp = symbol_get_value_expression (line_label);
- know (symexp->X_op == O_symbol);
- know (symexp->X_add_symbol == mri_common_symbol);
- symexp->X_add_number += 1;
- }
- }
- }
- else
- {
- do_align (1, (char *) NULL, 0, 0);
- if (line_label != NULL)
- {
- symbol_set_frag (line_label, frag_now);
- S_SET_VALUE (line_label, frag_now_fix ());
- }
- }
- }
- bytes = mult;
- expression (&exp);
- SKIP_WHITESPACE ();
- if (*input_line_pointer == ',')
- {
- ++input_line_pointer;
- expression (&val);
- }
- else
- {
- val.X_op = O_constant;
- val.X_add_number = 0;
- }
- if ((val.X_op != O_constant
- || val.X_add_number < - 0x80
- || val.X_add_number > 0xff
- || (mult != 0 && mult != 1 && val.X_add_number != 0))
- && (now_seg != absolute_section && !in_bss ()))
- {
- resolve_expression (&exp);
- if (exp.X_op != O_constant)
- as_bad (_("unsupported variable size or fill value"));
- else
- {
- offsetT i;
- /* PR 20901: Check for excessive values.
- FIXME: 1<<10 is an arbitrary limit. Maybe use maxpagesize instead ? */
- if (exp.X_add_number < 0 || exp.X_add_number > (1 << 10))
- as_bad (_("size value for space directive too large: %lx"),
- (long) exp.X_add_number);
- else
- {
- if (mult == 0)
- mult = 1;
- bytes = mult * exp.X_add_number;
- for (i = 0; i < exp.X_add_number; i++)
- emit_expr (&val, mult);
- }
- }
- }
- else
- {
- if (now_seg == absolute_section || mri_common_symbol != NULL)
- resolve_expression (&exp);
- if (exp.X_op == O_constant)
- {
- offsetT repeat;
- repeat = exp.X_add_number;
- if (mult)
- repeat *= mult;
- bytes = repeat;
- if (repeat <= 0)
- {
- if (!flag_mri)
- as_warn (_(".space repeat count is zero, ignored"));
- else if (repeat < 0)
- as_warn (_(".space repeat count is negative, ignored"));
- goto getout;
- }
- /* If we are in the absolute section, just bump the offset. */
- if (now_seg == absolute_section)
- {
- if (val.X_op != O_constant || val.X_add_number != 0)
- as_warn (_("ignoring fill value in absolute section"));
- abs_section_offset += repeat;
- goto getout;
- }
- /* If we are secretly in an MRI common section, then
- creating space just increases the size of the common
- symbol. */
- if (mri_common_symbol != NULL)
- {
- S_SET_VALUE (mri_common_symbol,
- S_GET_VALUE (mri_common_symbol) + repeat);
- goto getout;
- }
- if (!need_pass_2)
- p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0,
- (offsetT) repeat, (char *) 0);
- }
- else
- {
- if (now_seg == absolute_section)
- {
- as_bad (_("space allocation too complex in absolute section"));
- subseg_set (text_section, 0);
- }
- if (mri_common_symbol != NULL)
- {
- as_bad (_("space allocation too complex in common section"));
- mri_common_symbol = NULL;
- }
- if (!need_pass_2)
- p = frag_var (rs_space, 1, 1, (relax_substateT) 0,
- make_expr_symbol (&exp), (offsetT) 0, (char *) 0);
- }
- if ((val.X_op != O_constant || val.X_add_number != 0) && in_bss ())
- as_warn (_("ignoring fill value in section `%s'"),
- segment_name (now_seg));
- else if (p)
- *p = val.X_add_number;
- }
- getout:
- /* In MRI mode, after an odd number of bytes, we must align to an
- even word boundary, unless the next instruction is a dc.b, ds.b
- or dcb.b. */
- if (flag_mri && (bytes & 1) != 0)
- mri_pending_align = 1;
- demand_empty_rest_of_line ();
- if (flag_mri)
- mri_comment_end (stop, stopc);
- }
- void
- s_nop (int ignore ATTRIBUTE_UNUSED)
- {
- expressionS exp;
- fragS *start;
- addressT start_off;
- offsetT frag_off;
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- #ifdef md_cons_align
- md_cons_align (1);
- #endif
- SKIP_WHITESPACE ();
- expression (&exp);
- demand_empty_rest_of_line ();
- start = frag_now;
- start_off = frag_now_fix ();
- do
- {
- #ifdef md_emit_single_noop
- md_emit_single_noop;
- #else
- char *nop;
- #ifndef md_single_noop_insn
- #define md_single_noop_insn "nop"
- #endif
- /* md_assemble might modify its argument, so
- we must pass it a string that is writable. */
- if (asprintf (&nop, "%s", md_single_noop_insn) < 0)
- as_fatal ("%s", xstrerror (errno));
- /* Some targets assume that they can update input_line_pointer
- inside md_assemble, and, worse, that they can leave it
- assigned to the string pointer that was provided as an
- argument. So preserve ilp here. */
- char *saved_ilp = input_line_pointer;
- md_assemble (nop);
- input_line_pointer = saved_ilp;
- free (nop);
- #endif
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- } while (exp.X_op == O_constant
- && exp.X_add_number > 0
- && frag_offset_ignore_align_p (start, frag_now, &frag_off)
- && frag_off + frag_now_fix () < start_off + exp.X_add_number);
- }
- void
- s_nops (int ignore ATTRIBUTE_UNUSED)
- {
- expressionS exp;
- expressionS val;
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- #ifdef md_cons_align
- md_cons_align (1);
- #endif
- SKIP_WHITESPACE ();
- expression (&exp);
- /* Note - this expression is tested for an absolute value in
- write.c:relax_segment(). */
- SKIP_WHITESPACE ();
- if (*input_line_pointer == ',')
- {
- ++input_line_pointer;
- expression (&val);
- }
- else
- {
- val.X_op = O_constant;
- val.X_add_number = 0;
- }
- if (val.X_op != O_constant)
- {
- as_bad (_("unsupported variable nop control in .nops directive"));
- val.X_op = O_constant;
- val.X_add_number = 0;
- }
- else if (val.X_add_number < 0)
- {
- as_warn (_("negative nop control byte, ignored"));
- val.X_add_number = 0;
- }
- demand_empty_rest_of_line ();
- if (need_pass_2)
- /* Ignore this directive if we are going to perform a second pass. */
- return;
- /* Store the no-op instruction control byte in the first byte of frag. */
- char *p;
- symbolS *sym = make_expr_symbol (&exp);
- p = frag_var (rs_space_nop, 1, 1, (relax_substateT) 0,
- sym, (offsetT) 0, (char *) 0);
- *p = val.X_add_number;
- }
- /* Obtain the size of a floating point number, given a type. */
- static int
- float_length (int float_type, int *pad_p)
- {
- int length, pad = 0;
- switch (float_type)
- {
- case 'b':
- case 'B':
- case 'h':
- case 'H':
- length = 2;
- break;
- case 'f':
- case 'F':
- case 's':
- case 'S':
- length = 4;
- break;
- case 'd':
- case 'D':
- case 'r':
- case 'R':
- length = 8;
- break;
- case 'x':
- case 'X':
- #ifdef X_PRECISION
- length = X_PRECISION * sizeof (LITTLENUM_TYPE);
- pad = X_PRECISION_PAD * sizeof (LITTLENUM_TYPE);
- if (!length)
- #endif
- length = 12;
- break;
- case 'p':
- case 'P':
- #ifdef P_PRECISION
- length = P_PRECISION * sizeof (LITTLENUM_TYPE);
- pad = P_PRECISION_PAD * sizeof (LITTLENUM_TYPE);
- if (!length)
- #endif
- length = 12;
- break;
- default:
- as_bad (_("unknown floating type '%c'"), float_type);
- length = -1;
- break;
- }
- if (pad_p)
- *pad_p = pad;
- return length;
- }
- static int
- parse_one_float (int float_type, char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT])
- {
- int length;
- SKIP_WHITESPACE ();
- /* Skip any 0{letter} that may be present. Don't even check if the
- letter is legal. Someone may invent a "z" format and this routine
- has no use for such information. Lusers beware: you get
- diagnostics if your input is ill-conditioned. */
- if (input_line_pointer[0] == '0'
- && ISALPHA (input_line_pointer[1]))
- input_line_pointer += 2;
- /* Accept :xxxx, where the x's are hex digits, for a floating point
- with the exact digits specified. */
- if (input_line_pointer[0] == ':')
- {
- ++input_line_pointer;
- length = hex_float (float_type, temp);
- if (length < 0)
- {
- ignore_rest_of_line ();
- return length;
- }
- }
- else
- {
- const char *err;
- err = md_atof (float_type, temp, &length);
- know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT);
- know (err != NULL || length > 0);
- if (err)
- {
- as_bad (_("bad floating literal: %s"), err);
- ignore_rest_of_line ();
- return -1;
- }
- }
- return length;
- }
- /* This is like s_space, but the value is a floating point number with
- the given precision. This is for the MRI dcb.s pseudo-op and
- friends. */
- void
- s_float_space (int float_type)
- {
- offsetT count;
- int flen;
- char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
- char *stop = NULL;
- char stopc = 0;
- #ifdef md_cons_align
- md_cons_align (1);
- #endif
- if (flag_mri)
- stop = mri_comment_field (&stopc);
- count = get_absolute_expression ();
- SKIP_WHITESPACE ();
- if (*input_line_pointer != ',')
- {
- int pad;
- flen = float_length (float_type, &pad);
- if (flen >= 0)
- memset (temp, 0, flen += pad);
- }
- else
- {
- ++input_line_pointer;
- flen = parse_one_float (float_type, temp);
- }
- if (flen < 0)
- {
- if (flag_mri)
- mri_comment_end (stop, stopc);
- return;
- }
- while (--count >= 0)
- {
- char *p;
- p = frag_more (flen);
- memcpy (p, temp, (unsigned int) flen);
- }
- demand_empty_rest_of_line ();
- if (flag_mri)
- mri_comment_end (stop, stopc);
- }
- /* Handle the .struct pseudo-op, as found in MIPS assemblers. */
- void
- s_struct (int ignore ATTRIBUTE_UNUSED)
- {
- char *stop = NULL;
- char stopc = 0;
- if (flag_mri)
- stop = mri_comment_field (&stopc);
- abs_section_offset = get_absolute_expression ();
- #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
- /* The ELF backend needs to know that we are changing sections, so
- that .previous works correctly. */
- if (IS_ELF)
- obj_elf_section_change_hook ();
- #endif
- subseg_set (absolute_section, 0);
- demand_empty_rest_of_line ();
- if (flag_mri)
- mri_comment_end (stop, stopc);
- }
- void
- s_text (int ignore ATTRIBUTE_UNUSED)
- {
- int temp;
- temp = get_absolute_expression ();
- subseg_set (text_section, (subsegT) temp);
- demand_empty_rest_of_line ();
- }
- /* .weakref x, y sets x as an alias to y that, as long as y is not
- referenced directly, will cause y to become a weak symbol. */
- void
- s_weakref (int ignore ATTRIBUTE_UNUSED)
- {
- char *name;
- symbolS *symbolP;
- symbolS *symbolP2;
- expressionS exp;
- if ((name = read_symbol_name ()) == NULL)
- return;
- symbolP = symbol_find_or_make (name);
- if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP))
- {
- if (!S_IS_VOLATILE (symbolP))
- {
- as_bad (_("symbol `%s' is already defined"), name);
- goto err_out;
- }
- symbolP = symbol_clone (symbolP, 1);
- S_CLEAR_VOLATILE (symbolP);
- }
- SKIP_WHITESPACE ();
- if (*input_line_pointer != ',')
- {
- as_bad (_("expected comma after \"%s\""), name);
- goto err_out;
- }
- input_line_pointer++;
- SKIP_WHITESPACE ();
- free (name);
- if ((name = read_symbol_name ()) == NULL)
- return;
- if ((symbolP2 = symbol_find_noref (name, 1)) == NULL
- && (symbolP2 = md_undefined_symbol (name)) == NULL)
- {
- symbolP2 = symbol_find_or_make (name);
- S_SET_WEAKREFD (symbolP2);
- }
- else
- {
- symbolS *symp = symbolP2;
- while (S_IS_WEAKREFR (symp) && symp != symbolP)
- {
- expressionS *expP = symbol_get_value_expression (symp);
- gas_assert (expP->X_op == O_symbol
- && expP->X_add_number == 0);
- symp = expP->X_add_symbol;
- }
- if (symp == symbolP)
- {
- char *loop;
- loop = concat (S_GET_NAME (symbolP),
- " => ", S_GET_NAME (symbolP2), (const char *) NULL);
- symp = symbolP2;
- while (symp != symbolP)
- {
- char *old_loop = loop;
- symp = symbol_get_value_expression (symp)->X_add_symbol;
- loop = concat (loop, " => ", S_GET_NAME (symp),
- (const char *) NULL);
- free (old_loop);
- }
- as_bad (_("%s: would close weakref loop: %s"),
- S_GET_NAME (symbolP), loop);
- free (loop);
- free (name);
- ignore_rest_of_line ();
- return;
- }
- /* Short-circuiting instead of just checking here might speed
- things up a tiny little bit, but loop error messages would
- miss intermediate links. */
- /* symbolP2 = symp; */
- }
- memset (&exp, 0, sizeof (exp));
- exp.X_op = O_symbol;
- exp.X_add_symbol = symbolP2;
- S_SET_SEGMENT (symbolP, undefined_section);
- symbol_set_value_expression (symbolP, &exp);
- symbol_set_frag (symbolP, &zero_address_frag);
- S_SET_WEAKREFR (symbolP);
- demand_empty_rest_of_line ();
- free (name);
- return;
- err_out:
- ignore_rest_of_line ();
- free (name);
- return;
- }
- /* Verify that we are at the end of a line. If not, issue an error and
- skip to EOL. This function may leave input_line_pointer one past
- buffer_limit, so should not be called from places that may
- dereference input_line_pointer unconditionally. Note that when the
- gas parser is switched to handling a string (where buffer_limit
- should be the size of the string excluding the NUL terminator) this
- will be one past the NUL; is_end_of_line(0) returns true. */
- void
- demand_empty_rest_of_line (void)
- {
- SKIP_WHITESPACE ();
- if (input_line_pointer > buffer_limit)
- return;
- if (is_end_of_line[(unsigned char) *input_line_pointer])
- input_line_pointer++;
- else
- {
- if (ISPRINT (*input_line_pointer))
- as_bad (_("junk at end of line, first unrecognized character is `%c'"),
- *input_line_pointer);
- else
- as_bad (_("junk at end of line, first unrecognized character valued 0x%x"),
- *input_line_pointer);
- ignore_rest_of_line ();
- }
- /* Return pointing just after end-of-line. */
- }
- /* Silently advance to the end of line. Use this after already having
- issued an error about something bad. Like demand_empty_rest_of_line,
- this function may leave input_line_pointer one after buffer_limit;
- Don't call it from within expression parsing code in an attempt to
- silence further errors. */
- void
- ignore_rest_of_line (void)
- {
- while (input_line_pointer <= buffer_limit)
- if (is_end_of_line[(unsigned char) *input_line_pointer++])
- break;
- /* Return pointing just after end-of-line. */
- }
- /* Sets frag for given symbol to zero_address_frag, except when the
- symbol frag is already set to a dummy listing frag. */
- static void
- set_zero_frag (symbolS *symbolP)
- {
- if (symbol_get_frag (symbolP)->fr_type != rs_dummy)
- symbol_set_frag (symbolP, &zero_address_frag);
- }
- /* In: Pointer to a symbol.
- Input_line_pointer->expression.
- Out: Input_line_pointer->just after any whitespace after expression.
- Tried to set symbol to value of expression.
- Will change symbols type, value, and frag; */
- void
- pseudo_set (symbolS *symbolP)
- {
- expressionS exp;
- segT seg;
- know (symbolP); /* NULL pointer is logic error. */
- if (!S_IS_FORWARD_REF (symbolP))
- (void) expression (&exp);
- else
- (void) deferred_expression (&exp);
- if (exp.X_op == O_illegal)
- as_bad (_("illegal expression"));
- else if (exp.X_op == O_absent)
- as_bad (_("missing expression"));
- else if (exp.X_op == O_big)
- {
- if (exp.X_add_number > 0)
- as_bad (_("bignum invalid"));
- else
- as_bad (_("floating point number invalid"));
- }
- else if (exp.X_op == O_subtract
- && !S_IS_FORWARD_REF (symbolP)
- && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol))
- && (symbol_get_frag (exp.X_add_symbol)
- == symbol_get_frag (exp.X_op_symbol)))
- {
- exp.X_op = O_constant;
- exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol)
- - S_GET_VALUE (exp.X_op_symbol));
- }
- if (symbol_section_p (symbolP))
- {
- as_bad ("attempt to set value of section symbol");
- return;
- }
- switch (exp.X_op)
- {
- case O_illegal:
- case O_absent:
- case O_big:
- exp.X_add_number = 0;
- /* Fall through. */
- case O_constant:
- S_SET_SEGMENT (symbolP, absolute_section);
- S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
- set_zero_frag (symbolP);
- break;
- case O_register:
- #ifndef TC_GLOBAL_REGISTER_SYMBOL_OK
- if (S_IS_EXTERNAL (symbolP))
- {
- as_bad ("can't equate global symbol `%s' with register name",
- S_GET_NAME (symbolP));
- return;
- }
- #endif
- S_SET_SEGMENT (symbolP, reg_section);
- S_SET_VALUE (symbolP, (valueT) exp.X_add_number);
- set_zero_frag (symbolP);
- symbol_get_value_expression (symbolP)->X_op = O_register;
- break;
- case O_symbol:
- seg = S_GET_SEGMENT (exp.X_add_symbol);
- /* For x=undef+const, create an expression symbol.
- For x=x+const, just update x except when x is an undefined symbol
- For x=defined+const, evaluate x. */
- if (symbolP == exp.X_add_symbol
- && (seg != undefined_section
- || !symbol_constant_p (symbolP)))
- {
- *symbol_X_add_number (symbolP) += exp.X_add_number;
- break;
- }
- else if (!S_IS_FORWARD_REF (symbolP) && seg != undefined_section)
- {
- symbolS *s = exp.X_add_symbol;
- if (S_IS_COMMON (s))
- as_bad (_("`%s' can't be equated to common symbol `%s'"),
- S_GET_NAME (symbolP), S_GET_NAME (s));
- S_SET_SEGMENT (symbolP, seg);
- S_SET_VALUE (symbolP, exp.X_add_number + S_GET_VALUE (s));
- symbol_set_frag (symbolP, symbol_get_frag (s));
- copy_symbol_attributes (symbolP, s);
- break;
- }
- S_SET_SEGMENT (symbolP, undefined_section);
- symbol_set_value_expression (symbolP, &exp);
- copy_symbol_attributes (symbolP, exp.X_add_symbol);
- set_zero_frag (symbolP);
- break;
- default:
- /* The value is some complex expression. */
- S_SET_SEGMENT (symbolP, expr_section);
- symbol_set_value_expression (symbolP, &exp);
- set_zero_frag (symbolP);
- break;
- }
- }
- /* cons()
- CONStruct more frag of .bytes, or .words etc.
- Should need_pass_2 be 1 then emit no frag(s).
- This understands EXPRESSIONS.
- Bug (?)
- This has a split personality. We use expression() to read the
- value. We can detect if the value won't fit in a byte or word.
- But we can't detect if expression() discarded significant digits
- in the case of a long. Not worth the crocks required to fix it. */
- /* Select a parser for cons expressions. */
- /* Some targets need to parse the expression in various fancy ways.
- You can define TC_PARSE_CONS_EXPRESSION to do whatever you like
- (for example, the HPPA does this). Otherwise, you can define
- REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these
- are defined, which is the normal case, then only simple expressions
- are permitted. */
- #ifdef TC_M68K
- static void
- parse_mri_cons (expressionS *exp, unsigned int nbytes);
- #endif
- #ifndef TC_PARSE_CONS_EXPRESSION
- #ifdef REPEAT_CONS_EXPRESSIONS
- #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
- (parse_repeat_cons (EXP, NBYTES), TC_PARSE_CONS_RETURN_NONE)
- static void
- parse_repeat_cons (expressionS *exp, unsigned int nbytes);
- #endif
- /* If we haven't gotten one yet, just call expression. */
- #ifndef TC_PARSE_CONS_EXPRESSION
- #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \
- (expression (EXP), TC_PARSE_CONS_RETURN_NONE)
- #endif
- #endif
- void
- do_parse_cons_expression (expressionS *exp,
- int nbytes ATTRIBUTE_UNUSED)
- {
- (void) TC_PARSE_CONS_EXPRESSION (exp, nbytes);
- }
- /* Worker to do .byte etc statements.
- Clobbers input_line_pointer and checks end-of-line. */
- static void
- cons_worker (int nbytes, /* 1=.byte, 2=.word, 4=.long. */
- int rva)
- {
- int c;
- expressionS exp;
- char *stop = NULL;
- char stopc = 0;
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- if (flag_mri)
- stop = mri_comment_field (&stopc);
- if (is_it_end_of_statement ())
- {
- demand_empty_rest_of_line ();
- if (flag_mri)
- mri_comment_end (stop, stopc);
- return;
- }
- if (nbytes == 0)
- nbytes = TC_ADDRESS_BYTES ();
- #ifdef md_cons_align
- md_cons_align (nbytes);
- #endif
- c = 0;
- do
- {
- TC_PARSE_CONS_RETURN_TYPE ret = TC_PARSE_CONS_RETURN_NONE;
- #ifdef TC_CONS_FIX_CHECK
- fixS **cur_fix = &frchain_now->fix_tail;
- if (*cur_fix != NULL)
- cur_fix = &(*cur_fix)->fx_next;
- #endif
- #ifdef TC_M68K
- if (flag_m68k_mri)
- parse_mri_cons (&exp, (unsigned int) nbytes);
- else
- #endif
- {
- #if 0
- if (*input_line_pointer == '"')
- {
- as_bad (_("unexpected `\"' in expression"));
- ignore_rest_of_line ();
- return;
- }
- #endif
- ret = TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes);
- }
- if (rva)
- {
- if (exp.X_op == O_symbol)
- exp.X_op = O_symbol_rva;
- else
- as_fatal (_("rva without symbol"));
- }
- emit_expr_with_reloc (&exp, (unsigned int) nbytes, ret);
- #ifdef TC_CONS_FIX_CHECK
- TC_CONS_FIX_CHECK (&exp, nbytes, *cur_fix);
- #endif
- ++c;
- }
- while (*input_line_pointer++ == ',');
- /* In MRI mode, after an odd number of bytes, we must align to an
- even word boundary, unless the next instruction is a dc.b, ds.b
- or dcb.b. */
- if (flag_mri && nbytes == 1 && (c & 1) != 0)
- mri_pending_align = 1;
- input_line_pointer--; /* Put terminator back into stream. */
- demand_empty_rest_of_line ();
- if (flag_mri)
- mri_comment_end (stop, stopc);
- }
- void
- cons (int size)
- {
- cons_worker (size, 0);
- }
- void
- s_rva (int size)
- {
- cons_worker (size, 1);
- }
- /* .reloc offset, reloc_name, symbol+addend. */
- static void
- s_reloc (int ignore ATTRIBUTE_UNUSED)
- {
- char *stop = NULL;
- char stopc = 0;
- expressionS exp;
- char *r_name;
- int c;
- struct reloc_list *reloc;
- struct _bfd_rel { const char * name; bfd_reloc_code_real_type code; };
- static struct _bfd_rel bfd_relocs[] =
- {
- { "NONE", BFD_RELOC_NONE },
- { "8", BFD_RELOC_8 },
- { "16", BFD_RELOC_16 },
- { "32", BFD_RELOC_32 },
- { "64", BFD_RELOC_64 }
- };
- reloc = XNEW (struct reloc_list);
- if (flag_mri)
- stop = mri_comment_field (&stopc);
- expression (&exp);
- switch (exp.X_op)
- {
- case O_illegal:
- case O_absent:
- case O_big:
- case O_register:
- as_bad (_("missing or bad offset expression"));
- goto err_out;
- case O_constant:
- exp.X_add_symbol = section_symbol (now_seg);
- /* Mark the section symbol used in relocation so that it will be
- included in the symbol table. */
- symbol_mark_used_in_reloc (exp.X_add_symbol);
- exp.X_op = O_symbol;
- /* Fallthru */
- case O_symbol:
- if (exp.X_add_number == 0)
- {
- reloc->u.a.offset_sym = exp.X_add_symbol;
- break;
- }
- /* Fallthru */
- default:
- reloc->u.a.offset_sym = make_expr_symbol (&exp);
- break;
- }
- SKIP_WHITESPACE ();
- if (*input_line_pointer != ',')
- {
- as_bad (_("missing reloc type"));
- goto err_out;
- }
- ++input_line_pointer;
- SKIP_WHITESPACE ();
- c = get_symbol_name (& r_name);
- if (strncasecmp (r_name, "BFD_RELOC_", 10) == 0)
- {
- unsigned int i;
- for (reloc->u.a.howto = NULL, i = 0; i < ARRAY_SIZE (bfd_relocs); i++)
- if (strcasecmp (r_name + 10, bfd_relocs[i].name) == 0)
- {
- reloc->u.a.howto = bfd_reloc_type_lookup (stdoutput,
- bfd_relocs[i].code);
- break;
- }
- }
- else
- reloc->u.a.howto = bfd_reloc_name_lookup (stdoutput, r_name);
- *input_line_pointer = c;
- if (reloc->u.a.howto == NULL)
- {
- as_bad (_("unrecognized reloc type"));
- goto err_out;
- }
- exp.X_op = O_absent;
- SKIP_WHITESPACE_AFTER_NAME ();
- if (*input_line_pointer == ',')
- {
- ++input_line_pointer;
- expression (&exp);
- }
- switch (exp.X_op)
- {
- case O_illegal:
- case O_big:
- case O_register:
- as_bad (_("bad reloc expression"));
- err_out:
- ignore_rest_of_line ();
- free (reloc);
- if (flag_mri)
- mri_comment_end (stop, stopc);
- return;
- case O_absent:
- reloc->u.a.sym = NULL;
- reloc->u.a.addend = 0;
- break;
- case O_constant:
- reloc->u.a.sym = NULL;
- reloc->u.a.addend = exp.X_add_number;
- break;
- case O_symbol:
- reloc->u.a.sym = exp.X_add_symbol;
- reloc->u.a.addend = exp.X_add_number;
- break;
- default:
- reloc->u.a.sym = make_expr_symbol (&exp);
- reloc->u.a.addend = 0;
- break;
- }
- reloc->file = as_where (&reloc->line);
- reloc->next = reloc_list;
- reloc_list = reloc;
- demand_empty_rest_of_line ();
- if (flag_mri)
- mri_comment_end (stop, stopc);
- }
- /* Put the contents of expression EXP into the object file using
- NBYTES bytes. If need_pass_2 is 1, this does nothing. */
- void
- emit_expr (expressionS *exp, unsigned int nbytes)
- {
- emit_expr_with_reloc (exp, nbytes, TC_PARSE_CONS_RETURN_NONE);
- }
- void
- emit_expr_with_reloc (expressionS *exp,
- unsigned int nbytes,
- TC_PARSE_CONS_RETURN_TYPE reloc)
- {
- operatorT op;
- char *p;
- valueT extra_digit = 0;
- /* Don't do anything if we are going to make another pass. */
- if (need_pass_2)
- return;
- frag_grow (nbytes);
- dot_value = frag_now_fix ();
- dot_frag = frag_now;
- #ifndef NO_LISTING
- #ifdef OBJ_ELF
- /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will
- appear as a four byte positive constant in the .line section,
- followed by a 2 byte 0xffff. Look for that case here. */
- {
- static int dwarf_line = -1;
- if (strcmp (segment_name (now_seg), ".line") != 0)
- dwarf_line = -1;
- else if (dwarf_line >= 0
- && nbytes == 2
- && exp->X_op == O_constant
- && (exp->X_add_number == -1 || exp->X_add_number == 0xffff))
- listing_source_line ((unsigned int) dwarf_line);
- else if (nbytes == 4
- && exp->X_op == O_constant
- && exp->X_add_number >= 0)
- dwarf_line = exp->X_add_number;
- else
- dwarf_line = -1;
- }
- /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will
- appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte
- AT_sibling (0x12) followed by a four byte address of the sibling
- followed by a 2 byte AT_name (0x38) followed by the name of the
- file. We look for that case here. */
- {
- static int dwarf_file = 0;
- if (strcmp (segment_name (now_seg), ".debug") != 0)
- dwarf_file = 0;
- else if (dwarf_file == 0
- && nbytes == 2
- && exp->X_op == O_constant
- && exp->X_add_number == 0x11)
- dwarf_file = 1;
- else if (dwarf_file == 1
- && nbytes == 2
- && exp->X_op == O_constant
- && exp->X_add_number == 0x12)
- dwarf_file = 2;
- else if (dwarf_file == 2
- && nbytes == 4)
- dwarf_file = 3;
- else if (dwarf_file == 3
- && nbytes == 2
- && exp->X_op == O_constant
- && exp->X_add_number == 0x38)
- dwarf_file = 4;
- else
- dwarf_file = 0;
- /* The variable dwarf_file_string tells stringer that the string
- may be the name of the source file. */
- if (dwarf_file == 4)
- dwarf_file_string = 1;
- else
- dwarf_file_string = 0;
- }
- #endif
- #endif
- if (check_eh_frame (exp, &nbytes))
- return;
- op = exp->X_op;
- /* Handle a negative bignum. */
- if (op == O_uminus
- && exp->X_add_number == 0
- && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big
- && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0)
- {
- int i;
- unsigned long carry;
- exp = symbol_get_value_expression (exp->X_add_symbol);
- /* Negate the bignum: one's complement each digit and add 1. */
- carry = 1;
- for (i = 0; i < exp->X_add_number; i++)
- {
- unsigned long next;
- next = (((~(generic_bignum[i] & LITTLENUM_MASK))
- & LITTLENUM_MASK)
- + carry);
- generic_bignum[i] = next & LITTLENUM_MASK;
- carry = next >> LITTLENUM_NUMBER_OF_BITS;
- }
- /* We can ignore any carry out, because it will be handled by
- extra_digit if it is needed. */
- extra_digit = (valueT) -1;
- op = O_big;
- }
- if (op == O_absent || op == O_illegal)
- {
- as_warn (_("zero assumed for missing expression"));
- exp->X_add_number = 0;
- op = O_constant;
- }
- else if (op == O_big && exp->X_add_number <= 0)
- {
- as_bad (_("floating point number invalid"));
- exp->X_add_number = 0;
- op = O_constant;
- }
- else if (op == O_register)
- {
- as_warn (_("register value used as expression"));
- op = O_constant;
- }
- /* Allow `.word 0' in the absolute section. */
- if (now_seg == absolute_section)
- {
- if (op != O_constant || exp->X_add_number != 0)
- as_bad (_("attempt to store value in absolute section"));
- abs_section_offset += nbytes;
- return;
- }
- /* Allow `.word 0' in BSS style sections. */
- if ((op != O_constant || exp->X_add_number != 0) && in_bss ())
- as_bad (_("attempt to store non-zero value in section `%s'"),
- segment_name (now_seg));
- p = frag_more ((int) nbytes);
- if (reloc != TC_PARSE_CONS_RETURN_NONE)
- {
- emit_expr_fix (exp, nbytes, frag_now, p, reloc);
- return;
- }
- #ifndef WORKING_DOT_WORD
- /* If we have the difference of two symbols in a word, save it on
- the broken_words list. See the code in write.c. */
- if (op == O_subtract && nbytes == 2)
- {
- struct broken_word *x;
- x = XNEW (struct broken_word);
- x->next_broken_word = broken_words;
- broken_words = x;
- x->seg = now_seg;
- x->subseg = now_subseg;
- x->frag = frag_now;
- x->word_goes_here = p;
- x->dispfrag = 0;
- x->add = exp->X_add_symbol;
- x->sub = exp->X_op_symbol;
- x->addnum = exp->X_add_number;
- x->added = 0;
- x->use_jump = 0;
- new_broken_words++;
- return;
- }
- #endif
- /* If we have an integer, but the number of bytes is too large to
- pass to md_number_to_chars, handle it as a bignum. */
- if (op == O_constant && nbytes > sizeof (valueT))
- {
- extra_digit = exp->X_unsigned ? 0 : -1;
- convert_to_bignum (exp, !exp->X_unsigned);
- op = O_big;
- }
- if (op == O_constant)
- {
- valueT get;
- valueT use;
- valueT mask;
- valueT unmask;
- /* JF << of >= number of bits in the object is undefined. In
- particular SPARC (Sun 4) has problems. */
- if (nbytes >= sizeof (valueT))
- {
- know (nbytes == sizeof (valueT));
- mask = 0;
- }
- else
- {
- /* Don't store these bits. */
- mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes);
- }
- unmask = ~mask; /* Do store these bits. */
- #ifdef NEVER
- "Do this mod if you want every overflow check to assume SIGNED 2's complement data.";
- mask = ~(unmask >> 1); /* Includes sign bit now. */
- #endif
- get = exp->X_add_number;
- use = get & unmask;
- if ((get & mask) != 0 && (-get & mask) != 0)
- {
- char get_buf[128];
- char use_buf[128];
- /* These buffers help to ease the translation of the warning message. */
- sprintf_vma (get_buf, get);
- sprintf_vma (use_buf, use);
- /* Leading bits contain both 0s & 1s. */
- as_warn (_("value 0x%s truncated to 0x%s"), get_buf, use_buf);
- }
- /* Put bytes in right order. */
- md_number_to_chars (p, use, (int) nbytes);
- }
- else if (op == O_big)
- {
- unsigned int size;
- LITTLENUM_TYPE *nums;
- size = exp->X_add_number * CHARS_PER_LITTLENUM;
- if (nbytes < size)
- {
- int i = nbytes / CHARS_PER_LITTLENUM;
- if (i != 0)
- {
- LITTLENUM_TYPE sign = 0;
- if ((generic_bignum[--i]
- & (1 << (LITTLENUM_NUMBER_OF_BITS - 1))) != 0)
- sign = ~(LITTLENUM_TYPE) 0;
- while (++i < exp->X_add_number)
- if (generic_bignum[i] != sign)
- break;
- }
- else if (nbytes == 1)
- {
- /* We have nbytes == 1 and CHARS_PER_LITTLENUM == 2 (probably).
- Check that bits 8.. of generic_bignum[0] match bit 7
- and that they match all of generic_bignum[1..exp->X_add_number]. */
- LITTLENUM_TYPE sign = (generic_bignum[0] & (1 << 7)) ? -1 : 0;
- LITTLENUM_TYPE himask = LITTLENUM_MASK & ~ 0xFF;
- if ((generic_bignum[0] & himask) == (sign & himask))
- {
- while (++i < exp->X_add_number)
- if (generic_bignum[i] != sign)
- break;
- }
- }
- if (i < exp->X_add_number)
- as_warn (ngettext ("bignum truncated to %d byte",
- "bignum truncated to %d bytes",
- nbytes),
- nbytes);
- size = nbytes;
- }
- if (nbytes == 1)
- {
- md_number_to_chars (p, (valueT) generic_bignum[0], 1);
- return;
- }
- know (nbytes % CHARS_PER_LITTLENUM == 0);
- if (target_big_endian)
- {
- while (nbytes > size)
- {
- md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
- nbytes -= CHARS_PER_LITTLENUM;
- p += CHARS_PER_LITTLENUM;
- }
- nums = generic_bignum + size / CHARS_PER_LITTLENUM;
- while (size >= CHARS_PER_LITTLENUM)
- {
- --nums;
- md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
- size -= CHARS_PER_LITTLENUM;
- p += CHARS_PER_LITTLENUM;
- }
- }
- else
- {
- nums = generic_bignum;
- while (size >= CHARS_PER_LITTLENUM)
- {
- md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM);
- ++nums;
- size -= CHARS_PER_LITTLENUM;
- p += CHARS_PER_LITTLENUM;
- nbytes -= CHARS_PER_LITTLENUM;
- }
- while (nbytes >= CHARS_PER_LITTLENUM)
- {
- md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM);
- nbytes -= CHARS_PER_LITTLENUM;
- p += CHARS_PER_LITTLENUM;
- }
- }
- }
- else
- emit_expr_fix (exp, nbytes, frag_now, p, TC_PARSE_CONS_RETURN_NONE);
- }
- void
- emit_expr_fix (expressionS *exp, unsigned int nbytes, fragS *frag, char *p,
- TC_PARSE_CONS_RETURN_TYPE r ATTRIBUTE_UNUSED)
- {
- int offset = 0;
- unsigned int size = nbytes;
- memset (p, 0, size);
- /* Generate a fixS to record the symbol value. */
- #ifdef TC_CONS_FIX_NEW
- TC_CONS_FIX_NEW (frag, p - frag->fr_literal + offset, size, exp, r);
- #else
- if (r != TC_PARSE_CONS_RETURN_NONE)
- {
- reloc_howto_type *reloc_howto;
- reloc_howto = bfd_reloc_type_lookup (stdoutput, r);
- size = bfd_get_reloc_size (reloc_howto);
- if (size > nbytes)
- {
- as_bad (ngettext ("%s relocations do not fit in %u byte",
- "%s relocations do not fit in %u bytes",
- nbytes),
- reloc_howto->name, nbytes);
- return;
- }
- else if (target_big_endian)
- offset = nbytes - size;
- }
- else
- switch (size)
- {
- case 1:
- r = BFD_RELOC_8;
- break;
- case 2:
- r = BFD_RELOC_16;
- break;
- case 3:
- r = BFD_RELOC_24;
- break;
- case 4:
- r = BFD_RELOC_32;
- break;
- case 8:
- r = BFD_RELOC_64;
- break;
- default:
- as_bad (_("unsupported BFD relocation size %u"), size);
- return;
- }
- fix_new_exp (frag, p - frag->fr_literal + offset, size,
- exp, 0, r);
- #endif
- }
- /* Handle an MRI style string expression. */
- #ifdef TC_M68K
- static void
- parse_mri_cons (expressionS *exp, unsigned int nbytes)
- {
- if (*input_line_pointer != '\''
- && (input_line_pointer[1] != '\''
- || (*input_line_pointer != 'A'
- && *input_line_pointer != 'E')))
- (void) TC_PARSE_CONS_EXPRESSION (exp, nbytes);
- else
- {
- unsigned int scan;
- unsigned int result = 0;
- /* An MRI style string. Cut into as many bytes as will fit into
- a nbyte chunk, left justify if necessary, and separate with
- commas so we can try again later. */
- if (*input_line_pointer == 'A')
- ++input_line_pointer;
- else if (*input_line_pointer == 'E')
- {
- as_bad (_("EBCDIC constants are not supported"));
- ++input_line_pointer;
- }
- input_line_pointer++;
- for (scan = 0; scan < nbytes; scan++)
- {
- if (*input_line_pointer == '\'')
- {
- if (input_line_pointer[1] == '\'')
- {
- input_line_pointer++;
- }
- else
- break;
- }
- result = (result << 8) | (*input_line_pointer++);
- }
- /* Left justify. */
- while (scan < nbytes)
- {
- result <<= 8;
- scan++;
- }
- /* Create correct expression. */
- exp->X_op = O_constant;
- exp->X_add_number = result;
- /* Fake it so that we can read the next char too. */
- if (input_line_pointer[0] != '\'' ||
- (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\''))
- {
- input_line_pointer -= 2;
- input_line_pointer[0] = ',';
- input_line_pointer[1] = '\'';
- }
- else
- input_line_pointer++;
- }
- }
- #endif /* TC_M68K */
- #ifdef REPEAT_CONS_EXPRESSIONS
- /* Parse a repeat expression for cons. This is used by the MIPS
- assembler. The format is NUMBER:COUNT; NUMBER appears in the
- object file COUNT times.
- To use this for a target, define REPEAT_CONS_EXPRESSIONS. */
- static void
- parse_repeat_cons (expressionS *exp, unsigned int nbytes)
- {
- expressionS count;
- int i;
- expression (exp);
- if (*input_line_pointer != ':')
- {
- /* No repeat count. */
- return;
- }
- ++input_line_pointer;
- expression (&count);
- if (count.X_op != O_constant
- || count.X_add_number <= 0)
- {
- as_warn (_("unresolvable or nonpositive repeat count; using 1"));
- return;
- }
- /* The cons function is going to output this expression once. So we
- output it count - 1 times. */
- for (i = count.X_add_number - 1; i > 0; i--)
- emit_expr (exp, nbytes);
- }
- #endif /* REPEAT_CONS_EXPRESSIONS */
- /* Parse a floating point number represented as a hex constant. This
- permits users to specify the exact bits they want in the floating
- point number. */
- static int
- hex_float (int float_type, char *bytes)
- {
- int pad, length = float_length (float_type, &pad);
- int i;
- if (length < 0)
- return length;
- /* It would be nice if we could go through expression to parse the
- hex constant, but if we get a bignum it's a pain to sort it into
- the buffer correctly. */
- i = 0;
- while (hex_p (*input_line_pointer) || *input_line_pointer == '_')
- {
- int d;
- /* The MRI assembler accepts arbitrary underscores strewn about
- through the hex constant, so we ignore them as well. */
- if (*input_line_pointer == '_')
- {
- ++input_line_pointer;
- continue;
- }
- if (i >= length)
- {
- as_warn (_("floating point constant too large"));
- return -1;
- }
- d = hex_value (*input_line_pointer) << 4;
- ++input_line_pointer;
- while (*input_line_pointer == '_')
- ++input_line_pointer;
- if (hex_p (*input_line_pointer))
- {
- d += hex_value (*input_line_pointer);
- ++input_line_pointer;
- }
- if (target_big_endian)
- bytes[i] = d;
- else
- bytes[length - i - 1] = d;
- ++i;
- }
- if (i < length)
- {
- if (target_big_endian)
- memset (bytes + i, 0, length - i);
- else
- memset (bytes, 0, length - i);
- }
- memset (bytes + length, 0, pad);
- return length + pad;
- }
- /* float_cons()
- CONStruct some more frag chars of .floats .ffloats etc.
- Makes 0 or more new frags.
- If need_pass_2 == 1, no frags are emitted.
- This understands only floating literals, not expressions. Sorry.
- A floating constant is defined by atof_generic(), except it is preceded
- by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its
- reading, I decided to be incompatible. This always tries to give you
- rounded bits to the precision of the pseudo-op. Former AS did premature
- truncation, restored noisy bits instead of trailing 0s AND gave you
- a choice of 2 flavours of noise according to which of 2 floating-point
- scanners you directed AS to use.
- In: input_line_pointer->whitespace before, or '0' of flonum. */
- void
- float_cons (/* Clobbers input_line-pointer, checks end-of-line. */
- int float_type /* 'f':.ffloat ... 'F':.float ... */)
- {
- char *p;
- int length; /* Number of chars in an object. */
- char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT];
- if (is_it_end_of_statement ())
- {
- demand_empty_rest_of_line ();
- return;
- }
- if (now_seg == absolute_section)
- {
- as_bad (_("attempt to store float in absolute section"));
- ignore_rest_of_line ();
- return;
- }
- if (in_bss ())
- {
- as_bad (_("attempt to store float in section `%s'"),
- segment_name (now_seg));
- ignore_rest_of_line ();
- return;
- }
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- #ifdef md_cons_align
- md_cons_align (1);
- #endif
- do
- {
- length = parse_one_float (float_type, temp);
- if (length < 0)
- return;
- if (!need_pass_2)
- {
- int count;
- count = 1;
- #ifdef REPEAT_CONS_EXPRESSIONS
- if (*input_line_pointer == ':')
- {
- expressionS count_exp;
- ++input_line_pointer;
- expression (&count_exp);
- if (count_exp.X_op != O_constant
- || count_exp.X_add_number <= 0)
- as_warn (_("unresolvable or nonpositive repeat count; using 1"));
- else
- count = count_exp.X_add_number;
- }
- #endif
- while (--count >= 0)
- {
- p = frag_more (length);
- memcpy (p, temp, (unsigned int) length);
- }
- }
- SKIP_WHITESPACE ();
- }
- while (*input_line_pointer++ == ',');
- /* Put terminator back into stream. */
- --input_line_pointer;
- demand_empty_rest_of_line ();
- }
- /* LEB128 Encoding.
- Note - we are using the DWARF standard's definition of LEB128 encoding
- where each 7-bit value is a stored in a byte, *not* an octet. This
- means that on targets where a byte contains multiple octets there is
- a *huge waste of space*. (This also means that we do not have to
- have special versions of these functions for when OCTETS_PER_BYTE_POWER
- is non-zero).
- If the 7-bit values were to be packed into N-bit bytes (where N > 8)
- we would then have to consider whether multiple, successive LEB128
- values should be packed into the bytes without padding (bad idea) or
- whether each LEB128 number is padded out to a whole number of bytes.
- Plus you have to decide on the endianness of packing octets into a
- byte. */
- /* Return the size of a LEB128 value in bytes. */
- static inline unsigned int
- sizeof_sleb128 (offsetT value)
- {
- int size = 0;
- unsigned byte;
- do
- {
- byte = (value & 0x7f);
- /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
- Fortunately, we can structure things so that the extra work reduces
- to a noop on systems that do things "properly". */
- value = (value >> 7) | ~(-(offsetT)1 >> 7);
- size += 1;
- }
- while (!(((value == 0) && ((byte & 0x40) == 0))
- || ((value == -1) && ((byte & 0x40) != 0))));
- return size;
- }
- static inline unsigned int
- sizeof_uleb128 (valueT value)
- {
- int size = 0;
- do
- {
- value >>= 7;
- size += 1;
- }
- while (value != 0);
- return size;
- }
- unsigned int
- sizeof_leb128 (valueT value, int sign)
- {
- if (sign)
- return sizeof_sleb128 ((offsetT) value);
- else
- return sizeof_uleb128 (value);
- }
- /* Output a LEB128 value. Returns the number of bytes used. */
- static inline unsigned int
- output_sleb128 (char *p, offsetT value)
- {
- char *orig = p;
- int more;
- do
- {
- unsigned byte = (value & 0x7f);
- /* Sadly, we cannot rely on typical arithmetic right shift behaviour.
- Fortunately, we can structure things so that the extra work reduces
- to a noop on systems that do things "properly". */
- value = (value >> 7) | ~(-(offsetT)1 >> 7);
- more = !((((value == 0) && ((byte & 0x40) == 0))
- || ((value == -1) && ((byte & 0x40) != 0))));
- if (more)
- byte |= 0x80;
- *p++ = byte;
- }
- while (more);
- return p - orig;
- }
- static inline unsigned int
- output_uleb128 (char *p, valueT value)
- {
- char *orig = p;
- do
- {
- unsigned byte = (value & 0x7f);
- value >>= 7;
- if (value != 0)
- /* More bytes to follow. */
- byte |= 0x80;
- *p++ = byte;
- }
- while (value != 0);
- return p - orig;
- }
- unsigned int
- output_leb128 (char *p, valueT value, int sign)
- {
- if (sign)
- return output_sleb128 (p, (offsetT) value);
- else
- return output_uleb128 (p, value);
- }
- /* Do the same for bignums. We combine sizeof with output here in that
- we don't output for NULL values of P. It isn't really as critical as
- for "normal" values that this be streamlined. Returns the number of
- bytes used. */
- static inline unsigned int
- output_big_sleb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size)
- {
- char *orig = p;
- valueT val = 0;
- int loaded = 0;
- unsigned byte;
- /* Strip leading sign extensions off the bignum. */
- while (size > 1
- && bignum[size - 1] == LITTLENUM_MASK
- && bignum[size - 2] > LITTLENUM_MASK / 2)
- size--;
- do
- {
- /* OR in the next part of the littlenum. */
- val |= (*bignum << loaded);
- loaded += LITTLENUM_NUMBER_OF_BITS;
- size--;
- bignum++;
- /* Add bytes until there are less than 7 bits left in VAL
- or until every non-sign bit has been written. */
- do
- {
- byte = val & 0x7f;
- loaded -= 7;
- val >>= 7;
- if (size > 0
- || val != ((byte & 0x40) == 0 ? 0 : ((valueT) 1 << loaded) - 1))
- byte |= 0x80;
- if (orig)
- *p = byte;
- p++;
- }
- while ((byte & 0x80) != 0 && loaded >= 7);
- }
- while (size > 0);
- /* Mop up any left-over bits (of which there will be less than 7). */
- if ((byte & 0x80) != 0)
- {
- /* Sign-extend VAL. */
- if (val & (1 << (loaded - 1)))
- val |= ~0U << loaded;
- if (orig)
- *p = val & 0x7f;
- p++;
- }
- return p - orig;
- }
- static inline unsigned int
- output_big_uleb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size)
- {
- char *orig = p;
- valueT val = 0;
- int loaded = 0;
- unsigned byte;
- /* Strip leading zeros off the bignum. */
- /* XXX: Is this needed? */
- while (size > 0 && bignum[size - 1] == 0)
- size--;
- do
- {
- if (loaded < 7 && size > 0)
- {
- val |= (*bignum << loaded);
- loaded += 8 * CHARS_PER_LITTLENUM;
- size--;
- bignum++;
- }
- byte = val & 0x7f;
- loaded -= 7;
- val >>= 7;
- if (size > 0 || val)
- byte |= 0x80;
- if (orig)
- *p = byte;
- p++;
- }
- while (byte & 0x80);
- return p - orig;
- }
- static unsigned int
- output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size, int sign)
- {
- if (sign)
- return output_big_sleb128 (p, bignum, size);
- else
- return output_big_uleb128 (p, bignum, size);
- }
- /* Generate the appropriate fragments for a given expression to emit a
- leb128 value. SIGN is 1 for sleb, 0 for uleb. */
- void
- emit_leb128_expr (expressionS *exp, int sign)
- {
- operatorT op = exp->X_op;
- unsigned int nbytes;
- if (op == O_absent || op == O_illegal)
- {
- as_warn (_("zero assumed for missing expression"));
- exp->X_add_number = 0;
- op = O_constant;
- }
- else if (op == O_big && exp->X_add_number <= 0)
- {
- as_bad (_("floating point number invalid"));
- exp->X_add_number = 0;
- op = O_constant;
- }
- else if (op == O_register)
- {
- as_warn (_("register value used as expression"));
- op = O_constant;
- }
- else if (op == O_constant
- && sign
- && (exp->X_add_number < 0) == !exp->X_extrabit)
- {
- /* We're outputting a signed leb128 and the sign of X_add_number
- doesn't reflect the sign of the original value. Convert EXP
- to a correctly-extended bignum instead. */
- convert_to_bignum (exp, exp->X_extrabit);
- op = O_big;
- }
- if (now_seg == absolute_section)
- {
- if (op != O_constant || exp->X_add_number != 0)
- as_bad (_("attempt to store value in absolute section"));
- abs_section_offset++;
- return;
- }
- if ((op != O_constant || exp->X_add_number != 0) && in_bss ())
- as_bad (_("attempt to store non-zero value in section `%s'"),
- segment_name (now_seg));
- /* Let check_eh_frame know that data is being emitted. nbytes == -1 is
- a signal that this is leb128 data. It shouldn't optimize this away. */
- nbytes = (unsigned int) -1;
- if (check_eh_frame (exp, &nbytes))
- abort ();
- /* Let the backend know that subsequent data may be byte aligned. */
- #ifdef md_cons_align
- md_cons_align (1);
- #endif
- if (op == O_constant)
- {
- /* If we've got a constant, emit the thing directly right now. */
- valueT value = exp->X_add_number;
- unsigned int size;
- char *p;
- size = sizeof_leb128 (value, sign);
- p = frag_more (size);
- if (output_leb128 (p, value, sign) > size)
- abort ();
- }
- else if (op == O_big)
- {
- /* O_big is a different sort of constant. */
- int nbr_digits = exp->X_add_number;
- unsigned int size;
- char *p;
- /* If the leading littenum is 0xffff, prepend a 0 to avoid confusion with
- a signed number. Unary operators like - or ~ always extend the
- bignum to its largest size. */
- if (exp->X_unsigned
- && nbr_digits < SIZE_OF_LARGE_NUMBER
- && generic_bignum[nbr_digits - 1] == LITTLENUM_MASK)
- generic_bignum[nbr_digits++] = 0;
- size = output_big_leb128 (NULL, generic_bignum, nbr_digits, sign);
- p = frag_more (size);
- if (output_big_leb128 (p, generic_bignum, nbr_digits, sign) > size)
- abort ();
- }
- else
- {
- /* Otherwise, we have to create a variable sized fragment and
- resolve things later. */
- frag_var (rs_leb128, sizeof_uleb128 (~(valueT) 0), 0, sign,
- make_expr_symbol (exp), 0, (char *) NULL);
- }
- }
- /* Parse the .sleb128 and .uleb128 pseudos. */
- void
- s_leb128 (int sign)
- {
- expressionS exp;
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- do
- {
- expression (&exp);
- emit_leb128_expr (&exp, sign);
- }
- while (*input_line_pointer++ == ',');
- input_line_pointer--;
- demand_empty_rest_of_line ();
- }
- static void
- stringer_append_char (int c, int bitsize)
- {
- if (c && in_bss ())
- as_bad (_("attempt to store non-empty string in section `%s'"),
- segment_name (now_seg));
- if (!target_big_endian)
- FRAG_APPEND_1_CHAR (c);
- switch (bitsize)
- {
- case 64:
- FRAG_APPEND_1_CHAR (0);
- FRAG_APPEND_1_CHAR (0);
- FRAG_APPEND_1_CHAR (0);
- FRAG_APPEND_1_CHAR (0);
- /* Fall through. */
- case 32:
- FRAG_APPEND_1_CHAR (0);
- FRAG_APPEND_1_CHAR (0);
- /* Fall through. */
- case 16:
- FRAG_APPEND_1_CHAR (0);
- /* Fall through. */
- case 8:
- break;
- default:
- /* Called with invalid bitsize argument. */
- abort ();
- break;
- }
- if (target_big_endian)
- FRAG_APPEND_1_CHAR (c);
- }
- /* Worker to do .ascii etc statements.
- Reads 0 or more ',' separated, double-quoted strings.
- Caller should have checked need_pass_2 is FALSE because we don't
- check it.
- Checks for end-of-line.
- BITS_APPENDZERO says how many bits are in a target char.
- The bottom bit is set if a NUL char should be appended to the strings. */
- void
- stringer (int bits_appendzero)
- {
- const int bitsize = bits_appendzero & ~7;
- const int append_zero = bits_appendzero & 1;
- unsigned int c;
- #if !defined(NO_LISTING) && defined (OBJ_ELF)
- char *start;
- #endif
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- #ifdef md_cons_align
- md_cons_align (1);
- #endif
- /* If we have been switched into the abs_section then we
- will not have an obstack onto which we can hang strings. */
- if (now_seg == absolute_section)
- {
- as_bad (_("strings must be placed into a section"));
- ignore_rest_of_line ();
- return;
- }
- /* The following awkward logic is to parse ZERO or more strings,
- comma separated. Recall a string expression includes spaces
- before the opening '\"' and spaces after the closing '\"'.
- We fake a leading ',' if there is (supposed to be)
- a 1st, expression. We keep demanding expressions for each ','. */
- if (is_it_end_of_statement ())
- {
- c = 0; /* Skip loop. */
- ++input_line_pointer; /* Compensate for end of loop. */
- }
- else
- {
- c = ','; /* Do loop. */
- }
- while (c == ',' || c == '<' || c == '"')
- {
- SKIP_WHITESPACE ();
- switch (*input_line_pointer)
- {
- case '\"':
- ++input_line_pointer; /*->1st char of string. */
- #if !defined(NO_LISTING) && defined (OBJ_ELF)
- start = input_line_pointer;
- #endif
- while (is_a_char (c = next_char_of_string ()))
- stringer_append_char (c, bitsize);
- /* Treat "a" "b" as "ab". Even if we are appending zeros. */
- SKIP_ALL_WHITESPACE ();
- if (*input_line_pointer == '"')
- break;
- if (append_zero)
- stringer_append_char (0, bitsize);
- #if !defined(NO_LISTING) && defined (OBJ_ELF)
- /* In ELF, when gcc is emitting DWARF 1 debugging output, it
- will emit .string with a filename in the .debug section
- after a sequence of constants. See the comment in
- emit_expr for the sequence. emit_expr will set
- dwarf_file_string to non-zero if this string might be a
- source file name. */
- if (strcmp (segment_name (now_seg), ".debug") != 0)
- dwarf_file_string = 0;
- else if (dwarf_file_string)
- {
- c = input_line_pointer[-1];
- input_line_pointer[-1] = '\0';
- listing_source_file (start);
- input_line_pointer[-1] = c;
- }
- #endif
- break;
- case '<':
- input_line_pointer++;
- c = get_single_number ();
- stringer_append_char (c, bitsize);
- if (*input_line_pointer != '>')
- {
- as_bad (_("expected <nn>"));
- ignore_rest_of_line ();
- return;
- }
- input_line_pointer++;
- break;
- case ',':
- input_line_pointer++;
- break;
- }
- SKIP_WHITESPACE ();
- c = *input_line_pointer;
- }
- demand_empty_rest_of_line ();
- }
- /* FIXME-SOMEDAY: I had trouble here on characters with the
- high bits set. We'll probably also have trouble with
- multibyte chars, wide chars, etc. Also be careful about
- returning values bigger than 1 byte. xoxorich. */
- unsigned int
- next_char_of_string (void)
- {
- unsigned int c;
- c = *input_line_pointer++ & CHAR_MASK;
- switch (c)
- {
- case 0:
- /* PR 20902: Do not advance past the end of the buffer. */
- -- input_line_pointer;
- c = NOT_A_CHAR;
- break;
- case '\"':
- c = NOT_A_CHAR;
- break;
- case '\n':
- as_warn (_("unterminated string; newline inserted"));
- bump_line_counters ();
- break;
- case '\\':
- if (!TC_STRING_ESCAPES)
- break;
- switch (c = *input_line_pointer++ & CHAR_MASK)
- {
- case 'b':
- c = '\b';
- break;
- case 'f':
- c = '\f';
- break;
- case 'n':
- c = '\n';
- break;
- case 'r':
- c = '\r';
- break;
- case 't':
- c = '\t';
- break;
- case 'v':
- c = '\013';
- break;
- case '\\':
- case '"':
- break; /* As itself. */
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- {
- unsigned number;
- int i;
- for (i = 0, number = 0;
- ISDIGIT (c) && i < 3;
- c = *input_line_pointer++, i++)
- {
- number = number * 8 + c - '0';
- }
- c = number & CHAR_MASK;
- }
- --input_line_pointer;
- break;
- case 'x':
- case 'X':
- {
- unsigned number;
- number = 0;
- c = *input_line_pointer++;
- while (ISXDIGIT (c))
- {
- if (ISDIGIT (c))
- number = number * 16 + c - '0';
- else if (ISUPPER (c))
- number = number * 16 + c - 'A' + 10;
- else
- number = number * 16 + c - 'a' + 10;
- c = *input_line_pointer++;
- }
- c = number & CHAR_MASK;
- --input_line_pointer;
- }
- break;
- case '\n':
- /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */
- as_warn (_("unterminated string; newline inserted"));
- c = '\n';
- bump_line_counters ();
- break;
- case 0:
- /* Do not advance past the end of the buffer. */
- -- input_line_pointer;
- c = NOT_A_CHAR;
- break;
- default:
- #ifdef ONLY_STANDARD_ESCAPES
- as_bad (_("bad escaped character in string"));
- c = '?';
- #endif /* ONLY_STANDARD_ESCAPES */
- break;
- }
- break;
- default:
- break;
- }
- return (c);
- }
- static segT
- get_segmented_expression (expressionS *expP)
- {
- segT retval;
- retval = expression (expP);
- if (expP->X_op == O_illegal
- || expP->X_op == O_absent
- || expP->X_op == O_big)
- {
- as_bad (_("expected address expression"));
- expP->X_op = O_constant;
- expP->X_add_number = 0;
- retval = absolute_section;
- }
- return retval;
- }
- static segT
- get_known_segmented_expression (expressionS *expP)
- {
- segT retval = get_segmented_expression (expP);
- if (retval == undefined_section)
- {
- /* There is no easy way to extract the undefined symbol from the
- expression. */
- if (expP->X_add_symbol != NULL
- && S_GET_SEGMENT (expP->X_add_symbol) != expr_section)
- as_warn (_("symbol \"%s\" undefined; zero assumed"),
- S_GET_NAME (expP->X_add_symbol));
- else
- as_warn (_("some symbol undefined; zero assumed"));
- retval = absolute_section;
- expP->X_op = O_constant;
- expP->X_add_number = 0;
- }
- return retval;
- }
- char /* Return terminator. */
- get_absolute_expression_and_terminator (long *val_pointer /* Return value of expression. */)
- {
- /* FIXME: val_pointer should probably be offsetT *. */
- *val_pointer = (long) get_absolute_expression ();
- return (*input_line_pointer++);
- }
- /* Like demand_copy_string, but return NULL if the string contains any '\0's.
- Give a warning if that happens. */
- char *
- demand_copy_C_string (int *len_pointer)
- {
- char *s;
- if ((s = demand_copy_string (len_pointer)) != 0)
- {
- int len;
- for (len = *len_pointer; len > 0; len--)
- {
- if (s[len - 1] == 0)
- {
- s = 0;
- *len_pointer = 0;
- as_bad (_("this string may not contain \'\\0\'"));
- break;
- }
- }
- }
- return s;
- }
- /* Demand string, but return a safe (=private) copy of the string.
- Return NULL if we can't read a string here. */
- char *
- demand_copy_string (int *lenP)
- {
- unsigned int c;
- int len;
- char *retval;
- len = 0;
- SKIP_WHITESPACE ();
- if (*input_line_pointer == '\"')
- {
- input_line_pointer++; /* Skip opening quote. */
- while (is_a_char (c = next_char_of_string ()))
- {
- obstack_1grow (¬es, c);
- len++;
- }
- /* JF this next line is so demand_copy_C_string will return a
- null terminated string. */
- obstack_1grow (¬es, '\0');
- retval = (char *) obstack_finish (¬es);
- }
- else
- {
- as_bad (_("missing string"));
- retval = NULL;
- ignore_rest_of_line ();
- }
- *lenP = len;
- return (retval);
- }
- /* In: Input_line_pointer->next character.
- Do: Skip input_line_pointer over all whitespace.
- Out: 1 if input_line_pointer->end-of-line. */
- int
- is_it_end_of_statement (void)
- {
- SKIP_WHITESPACE ();
- return (is_end_of_line[(unsigned char) *input_line_pointer]);
- }
- void
- equals (char *sym_name, int reassign)
- {
- char *stop = NULL;
- char stopc = 0;
- input_line_pointer++;
- if (*input_line_pointer == '=')
- input_line_pointer++;
- if (reassign < 0 && *input_line_pointer == '=')
- input_line_pointer++;
- while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
- input_line_pointer++;
- if (flag_mri)
- stop = mri_comment_field (&stopc);
- assign_symbol (sym_name, reassign >= 0 ? !reassign : reassign);
- if (flag_mri)
- {
- demand_empty_rest_of_line ();
- mri_comment_end (stop, stopc);
- }
- }
- /* .incbin -- include a file verbatim at the current location. */
- void
- s_incbin (int x ATTRIBUTE_UNUSED)
- {
- FILE * binfile;
- char * path;
- char * filename;
- char * binfrag;
- long skip = 0;
- long count = 0;
- long bytes;
- int len;
- #ifdef md_flush_pending_output
- md_flush_pending_output ();
- #endif
- #ifdef md_cons_align
- md_cons_align (1);
- #endif
- SKIP_WHITESPACE ();
- filename = demand_copy_string (& len);
- if (filename == NULL)
- return;
- SKIP_WHITESPACE ();
- /* Look for optional skip and count. */
- if (* input_line_pointer == ',')
- {
- ++ input_line_pointer;
- skip = get_absolute_expression ();
- SKIP_WHITESPACE ();
- if (* input_line_pointer == ',')
- {
- ++ input_line_pointer;
- count = get_absolute_expression ();
- if (count == 0)
- as_warn (_(".incbin count zero, ignoring `%s'"), filename);
- SKIP_WHITESPACE ();
- }
- }
- demand_empty_rest_of_line ();
- /* Try opening absolute path first, then try include dirs. */
- binfile = fopen (filename, FOPEN_RB);
- if (binfile == NULL)
- {
- int i;
- path = XNEWVEC (char, (unsigned long) len + include_dir_maxlen + 5);
- for (i = 0; i < include_dir_count; i++)
- {
- sprintf (path, "%s/%s", include_dirs[i], filename);
- binfile = fopen (path, FOPEN_RB);
- if (binfile != NULL)
- break;
- }
- if (binfile == NULL)
- as_bad (_("file not found: %s"), filename);
- }
- else
- path = xstrdup (filename);
- if (binfile)
- {
- long file_len;
- struct stat filestat;
- if (fstat (fileno (binfile), &filestat) != 0
- || ! S_ISREG (filestat.st_mode)
- || S_ISDIR (filestat.st_mode))
- {
- as_bad (_("unable to include `%s'"), path);
- goto done;
- }
-
- register_dependency (path);
- /* Compute the length of the file. */
- if (fseek (binfile, 0, SEEK_END) != 0)
- {
- as_bad (_("seek to end of .incbin file failed `%s'"), path);
- goto done;
- }
- file_len = ftell (binfile);
- /* If a count was not specified use the remainder of the file. */
- if (count == 0)
- count = file_len - skip;
- if (skip < 0 || count < 0 || file_len < 0 || skip + count > file_len)
- {
- as_bad (_("skip (%ld) or count (%ld) invalid for file size (%ld)"),
- skip, count, file_len);
- goto done;
- }
- if (fseek (binfile, skip, SEEK_SET) != 0)
- {
- as_bad (_("could not skip to %ld in file `%s'"), skip, path);
- goto done;
- }
- /* Allocate frag space and store file contents in it. */
- binfrag = frag_more (count);
- bytes = fread (binfrag, 1, count, binfile);
- if (bytes < count)
- as_warn (_("truncated file `%s', %ld of %ld bytes read"),
- path, bytes, count);
- }
- done:
- if (binfile != NULL)
- fclose (binfile);
- free (path);
- }
- /* .include -- include a file at this point. */
- void
- s_include (int arg ATTRIBUTE_UNUSED)
- {
- char *filename;
- int i;
- FILE *try_file;
- char *path;
- if (!flag_m68k_mri)
- {
- filename = demand_copy_string (&i);
- if (filename == NULL)
- {
- /* demand_copy_string has already printed an error and
- called ignore_rest_of_line. */
- return;
- }
- }
- else
- {
- SKIP_WHITESPACE ();
- i = 0;
- while (!is_end_of_line[(unsigned char) *input_line_pointer]
- && *input_line_pointer != ' '
- && *input_line_pointer != '\t')
- {
- obstack_1grow (¬es, *input_line_pointer);
- ++input_line_pointer;
- ++i;
- }
- obstack_1grow (¬es, '\0');
- filename = (char *) obstack_finish (¬es);
- while (!is_end_of_line[(unsigned char) *input_line_pointer])
- ++input_line_pointer;
- }
- demand_empty_rest_of_line ();
- path = XNEWVEC (char, (unsigned long) i
- + include_dir_maxlen + 5 /* slop */ );
- for (i = 0; i < include_dir_count; i++)
- {
- strcpy (path, include_dirs[i]);
- strcat (path, "/");
- strcat (path, filename);
- if (0 != (try_file = fopen (path, FOPEN_RT)))
- {
- fclose (try_file);
- goto gotit;
- }
- }
- free (path);
- path = filename;
- gotit:
- /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */
- register_dependency (path);
- input_scrub_insert_file (path);
- }
- void
- add_include_dir (char *path)
- {
- int i;
- if (include_dir_count == 0)
- {
- include_dirs = XNEWVEC (const char *, 2);
- include_dirs[0] = "."; /* Current dir. */
- include_dir_count = 2;
- }
- else
- {
- include_dir_count++;
- include_dirs = XRESIZEVEC (const char *, include_dirs,
- include_dir_count);
- }
- include_dirs[include_dir_count - 1] = path; /* New one. */
- i = strlen (path);
- if (i > include_dir_maxlen)
- include_dir_maxlen = i;
- }
- /* Output debugging information to denote the source file. */
- static void
- generate_file_debug (void)
- {
- if (debug_type == DEBUG_STABS)
- stabs_generate_asm_file ();
- }
- /* Output line number debugging information for the current source line. */
- void
- generate_lineno_debug (void)
- {
- switch (debug_type)
- {
- case DEBUG_UNSPECIFIED:
- case DEBUG_NONE:
- case DEBUG_DWARF:
- break;
- case DEBUG_STABS:
- stabs_generate_asm_lineno ();
- break;
- case DEBUG_ECOFF:
- ecoff_generate_asm_lineno ();
- break;
- case DEBUG_DWARF2:
- /* ??? We could here indicate to dwarf2dbg.c that something
- has changed. However, since there is additional backend
- support that is required (calling dwarf2_emit_insn), we
- let dwarf2dbg.c call as_where on its own. */
- break;
- }
- }
- /* Output debugging information to mark a function entry point or end point.
- END_P is zero for .func, and non-zero for .endfunc. */
- void
- s_func (int end_p)
- {
- do_s_func (end_p, NULL);
- }
- /* Subroutine of s_func so targets can choose a different default prefix.
- If DEFAULT_PREFIX is NULL, use the target's "leading char". */
- static void
- do_s_func (int end_p, const char *default_prefix)
- {
- /* Record the current function so that we can issue an error message for
- misplaced .func,.endfunc, and also so that .endfunc needs no
- arguments. */
- static char *current_name;
- static char *current_label;
- if (end_p)
- {
- if (current_name == NULL)
- {
- as_bad (_("missing .func"));
- ignore_rest_of_line ();
- return;
- }
- if (debug_type == DEBUG_STABS)
- stabs_generate_asm_endfunc (current_name, current_label);
- current_name = current_label = NULL;
- }
- else /* ! end_p */
- {
- char *name, *label;
- char delim1, delim2;
- if (current_name != NULL)
- {
- as_bad (_(".endfunc missing for previous .func"));
- ignore_rest_of_line ();
- return;
- }
- delim1 = get_symbol_name (& name);
- name = xstrdup (name);
- *input_line_pointer = delim1;
- SKIP_WHITESPACE_AFTER_NAME ();
- if (*input_line_pointer != ',')
- {
- if (default_prefix)
- {
- if (asprintf (&label, "%s%s", default_prefix, name) == -1)
- as_fatal ("%s", xstrerror (errno));
- }
- else
- {
- char leading_char = bfd_get_symbol_leading_char (stdoutput);
- /* Missing entry point, use function's name with the leading
- char prepended. */
- if (leading_char)
- {
- if (asprintf (&label, "%c%s", leading_char, name) == -1)
- as_fatal ("%s", xstrerror (errno));
- }
- else
- label = name;
- }
- }
- else
- {
- ++input_line_pointer;
- SKIP_WHITESPACE ();
- delim2 = get_symbol_name (& label);
- label = xstrdup (label);
- restore_line_pointer (delim2);
- }
- if (debug_type == DEBUG_STABS)
- stabs_generate_asm_func (name, label);
- current_name = name;
- current_label = label;
- }
- demand_empty_rest_of_line ();
- }
- #ifdef HANDLE_BUNDLE
- void
- s_bundle_align_mode (int arg ATTRIBUTE_UNUSED)
- {
- unsigned int align = get_absolute_expression ();
- SKIP_WHITESPACE ();
- demand_empty_rest_of_line ();
- if (align > (unsigned int) TC_ALIGN_LIMIT)
- as_fatal (_(".bundle_align_mode alignment too large (maximum %u)"),
- (unsigned int) TC_ALIGN_LIMIT);
- if (bundle_lock_frag != NULL)
- {
- as_bad (_("cannot change .bundle_align_mode inside .bundle_lock"));
- return;
- }
- bundle_align_p2 = align;
- }
- void
- s_bundle_lock (int arg ATTRIBUTE_UNUSED)
- {
- demand_empty_rest_of_line ();
- if (bundle_align_p2 == 0)
- {
- as_bad (_(".bundle_lock is meaningless without .bundle_align_mode"));
- return;
- }
- if (bundle_lock_depth == 0)
- {
- bundle_lock_frchain = frchain_now;
- bundle_lock_frag = start_bundle ();
- }
- ++bundle_lock_depth;
- }
- void
- s_bundle_unlock (int arg ATTRIBUTE_UNUSED)
- {
- unsigned int size;
- demand_empty_rest_of_line ();
- if (bundle_lock_frag == NULL)
- {
- as_bad (_(".bundle_unlock without preceding .bundle_lock"));
- return;
- }
- gas_assert (bundle_align_p2 > 0);
- gas_assert (bundle_lock_depth > 0);
- if (--bundle_lock_depth > 0)
- return;
- size = pending_bundle_size (bundle_lock_frag);
- if (size > 1U << bundle_align_p2)
- as_bad (_(".bundle_lock sequence is %u bytes, "
- "but bundle size is only %u bytes"),
- size, 1u << bundle_align_p2);
- else
- finish_bundle (bundle_lock_frag, size);
- bundle_lock_frag = NULL;
- bundle_lock_frchain = NULL;
- }
- #endif /* HANDLE_BUNDLE */
- void
- s_ignore (int arg ATTRIBUTE_UNUSED)
- {
- ignore_rest_of_line ();
- }
- void
- read_print_statistics (FILE *file)
- {
- htab_print_statistics (file, "pseudo-op table", po_hash);
- }
- /* Inserts the given line into the input stream.
- This call avoids macro/conditionals nesting checking, since the contents of
- the line are assumed to replace the contents of a line already scanned.
- An appropriate use of this function would be substitution of input lines when
- called by md_start_line_hook(). The given line is assumed to already be
- properly scrubbed. */
- void
- input_scrub_insert_line (const char *line)
- {
- sb newline;
- size_t len = strlen (line);
- sb_build (&newline, len);
- sb_add_buffer (&newline, line, len);
- input_scrub_include_sb (&newline, input_line_pointer, 0);
- sb_kill (&newline);
- buffer_limit = input_scrub_next_buffer (&input_line_pointer);
- }
- /* Insert a file into the input stream; the path must resolve to an actual
- file; no include path searching or dependency registering is performed. */
- void
- input_scrub_insert_file (char *path)
- {
- input_scrub_include_file (path, input_line_pointer);
- buffer_limit = input_scrub_next_buffer (&input_line_pointer);
- }
- /* Find the end of a line, considering quotation and escaping of quotes. */
- #if !defined(TC_SINGLE_QUOTE_STRINGS) && defined(SINGLE_QUOTE_STRINGS)
- # define TC_SINGLE_QUOTE_STRINGS 1
- #endif
- static char *
- _find_end_of_line (char *s, int mri_string, int insn ATTRIBUTE_UNUSED,
- int in_macro)
- {
- char inquote = '\0';
- int inescape = 0;
- while (!is_end_of_line[(unsigned char) *s]
- || (inquote && !ISCNTRL (*s))
- || (inquote == '\'' && flag_mri)
- #ifdef TC_EOL_IN_INSN
- || (insn && TC_EOL_IN_INSN (s))
- #endif
- /* PR 6926: When we are parsing the body of a macro the sequence
- \@ is special - it refers to the invocation count. If the @
- character happens to be registered as a line-separator character
- by the target, then the is_end_of_line[] test above will have
- returned true, but we need to ignore the line separating
- semantics in this particular case. */
- || (in_macro && inescape && *s == '@')
- )
- {
- if (mri_string && *s == '\'')
- inquote ^= *s;
- else if (inescape)
- inescape = 0;
- else if (*s == '\\')
- inescape = 1;
- else if (!inquote
- ? *s == '"'
- #ifdef TC_SINGLE_QUOTE_STRINGS
- || (TC_SINGLE_QUOTE_STRINGS && *s == '\'')
- #endif
- : *s == inquote)
- inquote ^= *s;
- ++s;
- }
- if (inquote)
- as_warn (_("missing closing `%c'"), inquote);
- if (inescape && !ignore_input ())
- as_warn (_("stray `\\'"));
- return s;
- }
- char *
- find_end_of_line (char *s, int mri_string)
- {
- return _find_end_of_line (s, mri_string, 0, 0);
- }
- static char *saved_ilp = NULL;
- static char *saved_limit;
- /* Use BUF as a temporary input pointer for calling other functions in this
- file. BUF must be a C string, so that its end can be found by strlen.
- Also sets the buffer_limit variable (local to this file) so that buffer
- overruns should not occur. Saves the current input line pointer so that
- it can be restored by calling restore_ilp().
- Does not support recursion. */
- void
- temp_ilp (char *buf)
- {
- gas_assert (saved_ilp == NULL);
- gas_assert (buf != NULL);
- saved_ilp = input_line_pointer;
- saved_limit = buffer_limit;
- /* Prevent the assert in restore_ilp from triggering if
- the input_line_pointer has not yet been initialised. */
- if (saved_ilp == NULL)
- saved_limit = saved_ilp = (char *) "";
- input_line_pointer = buf;
- buffer_limit = buf + strlen (buf);
- input_from_string = true;
- }
- /* Restore a saved input line pointer. */
- void
- restore_ilp (void)
- {
- gas_assert (saved_ilp != NULL);
- input_line_pointer = saved_ilp;
- buffer_limit = saved_limit;
- input_from_string = false;
- saved_ilp = NULL;
- }
|