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Move BFD_FAKE_SECTION to libbfd.h

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BFD_FAKE_SECTION and its sidekick GLOBAL_SYM_INIT don't need to be
cluttering bfd.h, and probably shouldn't be used outside bfd/.  To
make them internal to bfd, make the bfd ecoff small common section
declaration global so it can be used instead of a duplicate in
gas/ecoff.c.  Oddly this needs to go in bfd/ecofflink.c rather than
bfd/ecoff.c as the former is compiled for all targets needing the
ecoff small common section (some via a call in gas/config/obj-elf.c to
a function in gas/ecoff.c) while the latter is not.

While doing this rename ecoff_scom_section to _bfd_ecoff_scom_section
and remove support for traditional C from GLOBAL_SYM_INIT.
This commit is contained in:
Alan Modra
2025-02-24 16:57:53 +10:30
parent 268c8bda25
commit 43baf926ac
7 changed files with 66 additions and 86 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
bfd/bfd-in2.h
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@@ -976,57 +976,6 @@ discarded_section (const asection *sec)
&& sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS);
}
#define BFD_FAKE_SECTION(SEC, SYM, NAME, IDX, FLAGS) \
/* name, next, prev, id, section_id, index, flags, user_set_vma, */ \
{ NAME, NULL, NULL, IDX, 0, 0, FLAGS, 0, \
\
/* linker_mark, linker_has_input, gc_mark, decompress_status, */ \
0, 0, 1, 0, \
\
/* segment_mark, sec_info_type, use_rela_p, mmapped_p, alloced, */ \
0, 0, 0, 0, 0, \
\
/* sec_flg0, sec_flg1, sec_flg2, sec_flg3, sec_flg4, sec_flg5, */ \
0, 0, 0, 0, 0, 0, \
\
/* vma, lma, size, rawsize, compressed_size, */ \
0, 0, 0, 0, 0, \
\
/* output_offset, output_section, relocation, orelocation, */ \
0, &SEC, NULL, NULL, \
\
/* reloc_count, alignment_power, filepos, rel_filepos, */ \
0, 0, 0, 0, \
\
/* line_filepos, userdata, contents, lineno, lineno_count, */ \
0, NULL, NULL, NULL, 0, \
\
/* entsize, kept_section, moving_line_filepos, */ \
0, NULL, 0, \
\
/* target_index, used_by_bfd, constructor_chain, owner, */ \
0, NULL, NULL, NULL, \
\
/* symbol, */ \
(struct bfd_symbol *) SYM, \
\
/* map_head, map_tail, already_assigned, type */ \
{ NULL }, { NULL }, NULL, 0 \
\
}
/* We use a macro to initialize the static asymbol structures because
traditional C does not permit us to initialize a union member while
gcc warns if we don't initialize it.
the_bfd, name, value, attr, section [, udata] */
#ifdef __STDC__
#define GLOBAL_SYM_INIT(NAME, SECTION) \
{ 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 }}
#else
#define GLOBAL_SYM_INIT(NAME, SECTION) \
{ 0, NAME, 0, BSF_SECTION_SYM, SECTION }
#endif
void bfd_section_list_clear (bfd *);
asection *bfd_get_section_by_name (bfd *abfd, const char *name);

2
bfd/ecoff-bfd.h
View File

@@ -18,6 +18,8 @@
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
extern asection _bfd_ecoff_scom_section;
extern bool bfd_ecoff_set_gp_value
(bfd *abfd, bfd_vma gp_value);
extern bool bfd_ecoff_set_regmasks

16
bfd/ecoff.c
View File

@@ -661,18 +661,6 @@ _bfd_ecoff_slurp_symbolic_info (bfd *abfd,
/* ECOFF symbol table routines. The ECOFF symbol table is described
in gcc/mips-tfile.c. */
/* ECOFF uses two common sections. One is the usual one, and the
other is for small objects. All the small objects are kept
together, and then referenced via the gp pointer, which yields
faster assembler code. This is what we use for the small common
section. */
static asection ecoff_scom_section;
static const asymbol ecoff_scom_symbol =
GLOBAL_SYM_INIT (SCOMMON, &ecoff_scom_section);
static asection ecoff_scom_section =
BFD_FAKE_SECTION (ecoff_scom_section, &ecoff_scom_symbol,
SCOMMON, 0, SEC_IS_COMMON | SEC_SMALL_DATA);
/* Create an empty symbol. */
asymbol *
@@ -813,7 +801,7 @@ ecoff_set_symbol_info (bfd *abfd,
}
/* Fall through. */
case scSCommon:
asym->section = &ecoff_scom_section;
asym->section = &_bfd_ecoff_scom_section;
asym->flags = 0;
break;
case scVarRegister:
@@ -3441,7 +3429,7 @@ ecoff_link_add_externals (bfd *abfd,
}
/* Fall through. */
case scSCommon:
section = &ecoff_scom_section;
section = &_bfd_ecoff_scom_section;
break;
case scSUndefined:
section = bfd_und_section_ptr;

13
bfd/ecofflink.c
View File

@@ -32,7 +32,18 @@
#include "coff/ecoff.h"
#include "libcoff.h"
#include "libecoff.h"
/* ECOFF uses two common sections. One is the usual one, and the
other is for small objects. All the small objects are kept
together, and then referenced via the gp pointer, which yields
faster assembler code. This is what we use for the small common
section. */
static const asymbol ecoff_scom_symbol =
GLOBAL_SYM_INIT (SCOMMON, &_bfd_ecoff_scom_section);
asection _bfd_ecoff_scom_section =
BFD_FAKE_SECTION (_bfd_ecoff_scom_section, &ecoff_scom_symbol,
SCOMMON, 0, SEC_IS_COMMON | SEC_SMALL_DATA);
/* Routines to swap auxiliary information in and out. I am assuming
that the auxiliary information format is always going to be target
independent. */

43
bfd/libbfd.h
View File

@@ -3668,6 +3668,49 @@ bool _bfd_unrecognized_reloc
unsigned int r_type) ATTRIBUTE_HIDDEN;
/* Extracted from section.c. */
#define BFD_FAKE_SECTION(SEC, SYM, NAME, IDX, FLAGS) \
/* name, next, prev, id, section_id, index, flags, user_set_vma, */ \
{ NAME, NULL, NULL, IDX, 0, 0, FLAGS, 0, \
\
/* linker_mark, linker_has_input, gc_mark, decompress_status, */ \
0, 0, 1, 0, \
\
/* segment_mark, sec_info_type, use_rela_p, mmapped_p, alloced, */ \
0, 0, 0, 0, 0, \
\
/* sec_flg0, sec_flg1, sec_flg2, sec_flg3, sec_flg4, sec_flg5, */ \
0, 0, 0, 0, 0, 0, \
\
/* vma, lma, size, rawsize, compressed_size, */ \
0, 0, 0, 0, 0, \
\
/* output_offset, output_section, relocation, orelocation, */ \
0, &SEC, NULL, NULL, \
\
/* reloc_count, alignment_power, filepos, rel_filepos, */ \
0, 0, 0, 0, \
\
/* line_filepos, userdata, contents, lineno, lineno_count, */ \
0, NULL, NULL, NULL, 0, \
\
/* entsize, kept_section, moving_line_filepos, */ \
0, NULL, 0, \
\
/* target_index, used_by_bfd, constructor_chain, owner, */ \
0, NULL, NULL, NULL, \
\
/* symbol, */ \
(struct bfd_symbol *) SYM, \
\
/* map_head, map_tail, already_assigned, type */ \
{ NULL }, { NULL }, NULL, 0 \
\
}
#define GLOBAL_SYM_INIT(NAME, SECTION) \
/* the_bfd, name, value, attr, section, udata */ \
{ 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 } }
/* Extracted from stabs.c. */
bool _bfd_link_section_stabs
(bfd *, struct stab_info *, asection *, asection *, void **,

17
bfd/section.c
View File

@@ -712,6 +712,7 @@ EXTERNAL
. && sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS);
.}
.
INTERNAL
.#define BFD_FAKE_SECTION(SEC, SYM, NAME, IDX, FLAGS) \
. {* name, next, prev, id, section_id, index, flags, user_set_vma, *} \
. { NAME, NULL, NULL, IDX, 0, 0, FLAGS, 0, \
@@ -749,19 +750,11 @@ EXTERNAL
. {* map_head, map_tail, already_assigned, type *} \
. { NULL }, { NULL }, NULL, 0 \
. \
. }
. }
.
.{* We use a macro to initialize the static asymbol structures because
. traditional C does not permit us to initialize a union member while
. gcc warns if we don't initialize it.
. the_bfd, name, value, attr, section [, udata] *}
.#ifdef __STDC__
.#define GLOBAL_SYM_INIT(NAME, SECTION) \
. { 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 }}
.#else
.#define GLOBAL_SYM_INIT(NAME, SECTION) \
. { 0, NAME, 0, BSF_SECTION_SYM, SECTION }
.#endif
.#define GLOBAL_SYM_INIT(NAME, SECTION) \
. {* the_bfd, name, value, attr, section, udata *} \
. { 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 } }
.
*/

10
gas/ecoff.c
View File

@@ -36,6 +36,7 @@
#include "aout/stab_gnu.h"
#include "filenames.h"
#include "safe-ctype.h"
#include "ecoff-bfd.h"
/* Why isn't this in coff/sym.h? */
#define ST_RFDESCAPE 0xfff
@@ -3549,13 +3550,6 @@ ecoff_stab (int what,
cur_file_ptr = save_file_ptr;
}
static asection ecoff_scom_section;
static const asymbol ecoff_scom_symbol =
GLOBAL_SYM_INIT (SCOMMON, &ecoff_scom_section);
static asection ecoff_scom_section =
BFD_FAKE_SECTION (ecoff_scom_section, &ecoff_scom_symbol,
SCOMMON, 0, SEC_IS_COMMON | SEC_SMALL_DATA);
/* Frob an ECOFF symbol. Small common symbols go into a special
.scommon section rather than bfd_com_section. */
@@ -3566,7 +3560,7 @@ ecoff_frob_symbol (symbolS *sym)
&& S_GET_VALUE (sym) > 0
&& S_GET_VALUE (sym) <= bfd_get_gp_size (stdoutput))
{
S_SET_SEGMENT (sym, &ecoff_scom_section);
S_SET_SEGMENT (sym, &_bfd_ecoff_scom_section);
}
/* Double check weak symbols. */