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binutils-gdb/gas/config/obj-coff.h
Alan Modra 3bab069c29 gas init_stab_section and get_stab_string_offset 
get_stab_string_offset currently creates the stabstr section if not
already present, in the process keeping a reference to the malloc'd
section name string.  Really, the name belongs in bfd_alloc'd memory
or some obstack so that it doesn't show as a memory leak on exit.
s_stab_generic at least does allocate the name for the stab section on
an obstack, but doesn't tidy that as well as it could.  Return paths
after issuing a warning don't release the memory, nor the memory for
the "string" copy.

This patch fixes these problems.  s_stab_generic is rearranged so that
creation of the sections occurs earlier, before any potential uses of
the note obstack during expression parsing.  That makes it possible to
always free the section name strings unless used to create new
sections.  I've also avoided get_absolute_expression_and_terminator
as I see that function might skip over end-of-line, and lack of a
--input_line_pointer might have caused the following source line to be
ignored.  (Other uses of this function in gas are OK.)

	* config/obj-coff.c (obj_coff_init_stab_section): Add stabstr
	param.  Pass to get_stab_string_offset rather than name of
	section.
	* config/obj-som.c (obj_som_init_stab_section): Likewise.
	* config/obj-elf.c (obj_elf_init_stab_section): Likewise.
	(elf_init_stab_section): Adjust.
	* config/obj-coff.h (INIT_STAB_SECTION): Update.
	(obj_coff_init_stab_section): Update prototype.
	* config/obj-som.h: Similarly.
	* config/obj-elf.h: Similarly.
	* config/obj-multi.h (INIT_STAB_SECTION): Update.
	* obj.h (struct format_ops <init_stab_section>): Update.
	* read.h (get_stab_string_offset): Update prototype.
	* stabs.c (cached_sec): Delete.
	(stabs_begin): Adjust to suit.
	(get_stab_string_offset): Add stabstr param, delete stabstr_name
	and free_stabstr_secname params.  Don't make stabstr section
	here.
	(eat_comma): New function.
	(s_stab_generic): Replace stab_secname_obstack_end param with
	bool freenames.  Move creation of stab and stabstr sections
	earlier, so the names can be freed earlier before possible use
	of notes obstack during expression parsing.  Tidy error paths
	ensuring "string" is freed.  Use get_absolute_expression in
	place of get_absolute_expression_and_terminator.
	(s_stab): Adjust.
	(s_xstab): Use notes_concat to make stabstr section name.
2023-08-31 21:32:11 +09:30

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/* coff object file format
Copyright (C) 1989-2023 Free Software Foundation, Inc.
This file is part of GAS.
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. */
#ifndef OBJ_FORMAT_H
#define OBJ_FORMAT_H
#define OBJ_COFF 1
#include "targ-cpu.h"
/* This internal_lineno crap is to stop namespace pollution from the
bfd internal coff headerfile. */
#define internal_lineno bfd_internal_lineno
#include "coff/internal.h"
#undef internal_lineno
/* CPU-specific setup: */
#ifdef TC_ARM
#include "coff/arm.h"
#ifndef TARGET_FORMAT
#define TARGET_FORMAT "coff-arm"
#endif
#endif
#ifdef TC_AARCH64
#include "coff/aarch64.h"
#endif
#ifdef TC_PPC
#include "coff/rs6000.h"
#endif
#ifdef TC_I386
#ifdef TE_PEP
#include "coff/x86_64.h"
#else
#include "coff/i386.h"
#endif
#ifndef TARGET_FORMAT
#ifdef TE_PEP
#define TARGET_FORMAT "coff-x86-64"
#else
#define TARGET_FORMAT "coff-i386"
#endif
#endif
#endif
#ifdef TC_Z80
#include "coff/z80.h"
#define TARGET_FORMAT "coff-z80"
#endif
#ifdef TC_Z8K
#include "coff/z8k.h"
#define TARGET_FORMAT "coff-z8k"
#endif
#ifdef TC_SH
#ifdef TE_PE
#define COFF_WITH_PE
#endif
#include "coff/sh.h"
#ifdef TE_PE
#define TARGET_FORMAT "pe-shl"
#else
#define TARGET_FORMAT \
(!target_big_endian \
? (sh_small ? "coff-shl-small" : "coff-shl") \
: (sh_small ? "coff-sh-small" : "coff-sh"))
#endif
#endif
#ifdef TC_TIC30
#include "coff/tic30.h"
#define TARGET_FORMAT "coff-tic30"
#endif
#ifdef TC_TIC4X
#include "coff/tic4x.h"
#define TARGET_FORMAT "coff2-tic4x"
#endif
#ifdef TC_TIC54X
#include "coff/tic54x.h"
#define TARGET_FORMAT "coff1-c54x"
#endif
#ifdef TC_MCORE
#include "coff/mcore.h"
#ifndef TARGET_FORMAT
#define TARGET_FORMAT "pe-mcore"
#endif
#endif
#ifdef TE_PE
#define obj_set_weak_hook pecoff_obj_set_weak_hook
#define obj_clear_weak_hook pecoff_obj_clear_weak_hook
#endif
#ifndef OBJ_COFF_MAX_AUXENTRIES
#define OBJ_COFF_MAX_AUXENTRIES 1
#endif
#define obj_symbol_new_hook coff_obj_symbol_new_hook
#define obj_symbol_clone_hook coff_obj_symbol_clone_hook
#define obj_read_begin_hook coff_obj_read_begin_hook
#include "bfd/libcoff.h"
#define OUTPUT_FLAVOR bfd_target_coff_flavour
/* COFF symbol flags. See SF_* macros. */
#define OBJ_SYMFIELD_TYPE unsigned long
/* We can't use the predefined section symbols in bfd/section.c, as
COFF symbols have extra fields. See bfd/libcoff.h:coff_symbol_type. */
#ifndef obj_sec_sym_ok_for_reloc
#define obj_sec_sym_ok_for_reloc(SEC) ((SEC)->owner != 0)
#endif
#define SYM_AUXENT(S) \
(&coffsymbol (symbol_get_bfdsym (S))->native[1].u.auxent)
#define SYM_AUXINFO(S) \
(&coffsymbol (symbol_get_bfdsym (S))->native[1])
/* The number of auxiliary entries. */
#define S_GET_NUMBER_AUXILIARY(s) \
(coffsymbol (symbol_get_bfdsym (s))->native->u.syment.n_numaux)
/* The number of auxiliary entries. */
#define S_SET_NUMBER_AUXILIARY(s, v) (S_GET_NUMBER_AUXILIARY (s) = (v))
/* True if a symbol name is in the string table, i.e. its length is > 8. */
#define S_IS_STRING(s) (strlen (S_GET_NAME (s)) > 8 ? 1 : 0)
/* Auxiliary entry macros. SA_ stands for symbol auxiliary. */
/* Omit the tv related fields. */
/* Accessors. */
#define SA_GET_SYM_TAGNDX(s) (SYM_AUXENT (s)->x_sym.x_tagndx.u32)
#define SA_GET_SYM_LNNO(s) (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno)
#define SA_GET_SYM_SIZE(s) (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size)
#define SA_GET_SYM_FSIZE(s) (SYM_AUXENT (s)->x_sym.x_misc.x_fsize)
#define SA_GET_SYM_LNNOPTR(s) (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr)
#define SA_GET_SYM_ENDNDX(s) (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_endndx)
#define SA_GET_SYM_DIMEN(s,i) (SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)])
#define SA_GET_FILE_FNAME(s) (SYM_AUXENT (s)->x_file.x_fname)
#define SA_GET_SCN_SCNLEN(s) (SYM_AUXENT (s)->x_scn.x_scnlen)
#define SA_GET_SCN_NRELOC(s) (SYM_AUXENT (s)->x_scn.x_nreloc)
#define SA_GET_SCN_NLINNO(s) (SYM_AUXENT (s)->x_scn.x_nlinno)
#define SA_SET_SYM_LNNO(s,v) (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_lnno = (v))
#define SA_SET_SYM_SIZE(s,v) (SYM_AUXENT (s)->x_sym.x_misc.x_lnsz.x_size = (v))
#define SA_SET_SYM_FSIZE(s,v) (SYM_AUXENT (s)->x_sym.x_misc.x_fsize = (v))
#define SA_SET_SYM_LNNOPTR(s,v) (SYM_AUXENT (s)->x_sym.x_fcnary.x_fcn.x_lnnoptr = (v))
#define SA_SET_SYM_DIMEN(s,i,v) (SYM_AUXENT (s)->x_sym.x_fcnary.x_ary.x_dimen[(i)] = (v))
#define SA_SET_FILE_FNAME(s,v) strncpy (SYM_AUXENT (s)->x_file.x_fname, (v), FILNMLEN)
#define SA_SET_SCN_SCNLEN(s,v) (SYM_AUXENT (s)->x_scn.x_scnlen = (v))
#define SA_SET_SCN_NRELOC(s,v) (SYM_AUXENT (s)->x_scn.x_nreloc = (v))
#define SA_SET_SCN_NLINNO(s,v) (SYM_AUXENT (s)->x_scn.x_nlinno = (v))
#ifdef OBJ_XCOFF
#define SA_GET_SECT_SCNLEN(s) (SYM_AUXENT (s)->x_sect.x_scnlen)
#define SA_GET_SECT_NRELOC(s) (SYM_AUXENT (s)->x_sect.x_nreloc)
#define SA_SET_SECT_SCNLEN(s,v) (SYM_AUXENT (s)->x_sect.x_scnlen = (v))
#define SA_SET_SECT_NRELOC(s,v) (SYM_AUXENT (s)->x_sect.x_nreloc = (v))
#endif
/* Internal use only definitions. SF_ stands for symbol flags. These
values can be assigned to OBJ_SYMFIELD_TYPE obj field of a symbolS. */
#define SF_NORMAL_MASK 0x0000ffff /* bits 12-15 are general purpose. */
#define SF_STATICS 0x00001000 /* Mark the .text & all symbols. */
#define SF_DEFINED 0x00002000 /* Symbol is defined in this file. */
#define SF_STRING 0x00004000 /* Symbol name length > 8. */
#define SF_LOCAL 0x00008000 /* Symbol must not be emitted. */
#define SF_DEBUG_MASK 0xffff0000 /* bits 16-31 are debug info. */
#define SF_FUNCTION 0x00010000 /* The symbol is a function. */
#define SF_PROCESS 0x00020000 /* Process symbol before write. */
#define SF_TAGGED 0x00040000 /* Is associated with a tag. */
#define SF_TAG 0x00080000 /* Is a tag. */
#define SF_DEBUG 0x00100000 /* Is in debug or abs section. */
#define SF_GET_SEGMENT 0x00200000 /* Get the section of the forward symbol. */
/* All other bits are unused. */
/* Accessors. */
#define SF_GET(s) (* symbol_get_obj (s))
#define SF_GET_DEBUG(s) (symbol_get_bfdsym (s)->flags & BSF_DEBUGGING)
#define SF_SET_DEBUG(s) (symbol_get_bfdsym (s)->flags |= BSF_DEBUGGING)
#define SF_GET_NORMAL_FIELD(s) (SF_GET (s) & SF_NORMAL_MASK)
#define SF_GET_DEBUG_FIELD(s) (SF_GET (s) & SF_DEBUG_MASK)
#define SF_GET_FILE(s) (SF_GET (s) & SF_FILE)
#define SF_GET_STATICS(s) (SF_GET (s) & SF_STATICS)
#define SF_GET_DEFINED(s) (SF_GET (s) & SF_DEFINED)
#define SF_GET_STRING(s) (SF_GET (s) & SF_STRING)
#define SF_GET_LOCAL(s) (SF_GET (s) & SF_LOCAL)
#define SF_GET_FUNCTION(s) (SF_GET (s) & SF_FUNCTION)
#define SF_GET_PROCESS(s) (SF_GET (s) & SF_PROCESS)
#define SF_GET_TAGGED(s) (SF_GET (s) & SF_TAGGED)
#define SF_GET_TAG(s) (SF_GET (s) & SF_TAG)
#define SF_GET_GET_SEGMENT(s) (SF_GET (s) & SF_GET_SEGMENT)
/* Modifiers. */
#define SF_SET(s,v) (SF_GET (s) = (v))
#define SF_SET_NORMAL_FIELD(s,v)(SF_GET (s) |= ((v) & SF_NORMAL_MASK))
#define SF_SET_DEBUG_FIELD(s,v) (SF_GET (s) |= ((v) & SF_DEBUG_MASK))
#define SF_SET_FILE(s) (SF_GET (s) |= SF_FILE)
#define SF_SET_STATICS(s) (SF_GET (s) |= SF_STATICS)
#define SF_SET_DEFINED(s) (SF_GET (s) |= SF_DEFINED)
#define SF_SET_STRING(s) (SF_GET (s) |= SF_STRING)
#define SF_SET_LOCAL(s) (SF_GET (s) |= SF_LOCAL)
#define SF_CLEAR_LOCAL(s) (SF_GET (s) &= ~SF_LOCAL)
#define SF_SET_FUNCTION(s) (SF_GET (s) |= SF_FUNCTION)
#define SF_SET_PROCESS(s) (SF_GET (s) |= SF_PROCESS)
#define SF_SET_TAGGED(s) (SF_GET (s) |= SF_TAGGED)
#define SF_SET_TAG(s) (SF_GET (s) |= SF_TAG)
#define SF_SET_GET_SEGMENT(s) (SF_GET (s) |= SF_GET_SEGMENT)
/* Line number handling. */
extern int text_lineno_number;
extern int coff_line_base;
extern int coff_n_line_nos;
extern symbolS *coff_last_function;
#define obj_emit_lineno(WHERE, LINE, FILE_START) abort ()
#define obj_app_file(name) c_dot_file_symbol (name)
#define obj_frob_symbol(S,P) coff_frob_symbol (S, & P)
#define obj_frob_section(S) coff_frob_section (S)
#define obj_frob_file_after_relocs() coff_frob_file_after_relocs ()
#ifndef obj_adjust_symtab
#define obj_adjust_symtab() coff_adjust_symtab ()
#endif
/* Forward the segment of a forwarded symbol, handle assignments that
just copy symbol values, etc. */
#ifndef OBJ_COPY_SYMBOL_ATTRIBUTES
#ifndef TE_I386AIX
#define OBJ_COPY_SYMBOL_ATTRIBUTES(dest, src) \
(SF_GET_GET_SEGMENT (dest) \
? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
: 0)
#else
#define OBJ_COPY_SYMBOL_ATTRIBUTES(dest, src) \
(SF_GET_GET_SEGMENT (dest) && S_GET_SEGMENT (dest) == SEG_UNKNOWN \
? (S_SET_SEGMENT (dest, S_GET_SEGMENT (src)), 0) \
: 0)
#endif
#endif
/* Sanity check. */
extern const pseudo_typeS coff_pseudo_table[];
#ifndef obj_pop_insert
#define obj_pop_insert() pop_insert (coff_pseudo_table)
#endif
/* In COFF, if a symbol is defined using .def/.val SYM/.endef, it's OK
to redefine the symbol later on. This can happen if C symbols use
a prefix, and a symbol is defined both with and without the prefix,
as in start/_start/__start in gcc/libgcc1-test.c. */
#define RESOLVE_SYMBOL_REDEFINITION(sym) \
(SF_GET_GET_SEGMENT (sym) \
? (sym->frag = frag_now, \
S_SET_VALUE (sym, frag_now_fix ()), \
S_SET_SEGMENT (sym, now_seg), \
0) \
: 0)
/* Stabs in a coff file go into their own section. */
#define SEPARATE_STAB_SECTIONS 1
/* We need 12 bytes at the start of the section to hold some initial
information. */
#define INIT_STAB_SECTION(stab, str) obj_coff_init_stab_section (stab, str)
/* Store the number of relocations in the section aux entry. */
#ifdef OBJ_XCOFF
#define SET_SECTION_RELOCS(sec, relocs, n) \
do { \
symbolS * sectSym = section_symbol (sec); \
if (S_GET_STORAGE_CLASS (sectSym) == C_DWARF) \
SA_SET_SECT_NRELOC (sectSym, n); \
else \
SA_SET_SCN_NRELOC (sectSym, n); \
} while (0)
#else
#define SET_SECTION_RELOCS(sec, relocs, n) \
SA_SET_SCN_NRELOC (section_symbol (sec), n)
#endif
extern int S_SET_DATA_TYPE (symbolS *, int);
extern int S_SET_STORAGE_CLASS (symbolS *, int);
extern int S_GET_STORAGE_CLASS (symbolS *);
extern void SA_SET_SYM_ENDNDX (symbolS *, symbolS *);
extern void coff_add_linesym (symbolS *);
extern void c_dot_file_symbol (const char *);
extern void coff_frob_symbol (symbolS *, int *);
extern void coff_adjust_symtab (void);
extern void coff_frob_section (segT);
extern void coff_adjust_section_syms (bfd *, asection *, void *);
extern void coff_frob_file_after_relocs (void);
extern void coff_obj_symbol_new_hook (symbolS *);
extern void coff_obj_symbol_clone_hook (symbolS *, symbolS *);
extern void coff_obj_read_begin_hook (void);
#ifdef TE_PE
extern void pecoff_obj_set_weak_hook (symbolS *);
extern void pecoff_obj_clear_weak_hook (symbolS *);
#endif
extern void obj_coff_section (int);
extern segT obj_coff_add_segment (const char *);
extern void obj_coff_section (int);
extern segT s_get_segment (symbolS *);
#ifndef tc_coff_symbol_emit_hook
extern void tc_coff_symbol_emit_hook (symbolS *);
#endif
extern void obj_coff_pe_handle_link_once (void);
extern void obj_coff_init_stab_section (segT, segT);
extern void c_section_header (struct internal_scnhdr *,
char *, long, long, long, long,
long, long, long, long);
extern void obj_coff_seh_do_final (void);
#ifndef obj_coff_generate_pdata
#define obj_coff_generate_pdata obj_coff_seh_do_final
#endif
#endif /* OBJ_FORMAT_H */
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