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miscellaneous SEC_SMALL_DATA

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This patch arranges for symbols defined in .sdata and .sbss to be
reported by nm with 'g' and 's' flags, for coff targets that support
.sdata and .sbss.

The assembler changes regarding SEC_SMALL_DATA are really just
documentation.  As far as I'm aware, this won't change any assembler
output.

bfd/
	* coff-alpha.c (alpha_ecoff_le_vec): Add SEC_SMALL_DATA to
	applicable section flags.
	* coff-mips.c (mips_ecoff_le_vec, mips_ecoff_be_vec): Likewise.
	(mips_ecoff_bele_vec): Likewise.
	* coffcode.h (sec_to_styp_flags): Set SEC_SMALL_DATA for .sdata
	and .sbss sections.
	* ecoff.c (_bfd_ecoff_new_section_hook): Likewise.
	(_bfd_ecoff_styp_to_sec_flags): Likewise.
gas/
	* config/tc-m32r.c (md_begin): Set SEC_SMALL_DATA on .scommon section.
	* config/tc-mips.c (s_change_sec): Set SEC_SMALL_DATA for .sdata
	and .sbss sections.
	* config/tc-score.c: Delete !BFD_ASSEMBLER code throughout.
	(s3_s_change_sec): Set SEC_SMALL_DATA for .sbss section.
	(s3_s_score_lcomm): Likewise.
	* config/tc-score7.c: Similarly.
	* read.c (bss_alloc): Set SEC_SMALL_DATA for .sbss section.
This commit is contained in:
Alan Modra 2020-03-02 10:17:18 +10:30
parent bf57746745
commit a4dd6c97bd
11 changed files with 74 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
bfd/ChangeLog
View File

@ -1,3 +1,14 @@
2020-03-02 Alan Modra <amodra@gmail.com>
* coff-alpha.c (alpha_ecoff_le_vec): Add SEC_SMALL_DATA to
applicable section flags.
* coff-mips.c (mips_ecoff_le_vec, mips_ecoff_be_vec): Likewise.
(mips_ecoff_bele_vec): Likewise.
* coffcode.h (sec_to_styp_flags): Set SEC_SMALL_DATA for .sdata
and .sbss sections.
* ecoff.c (_bfd_ecoff_new_section_hook): Likewise.
(_bfd_ecoff_styp_to_sec_flags): Likewise.
2020-03-02 Alan Modra <amodra@gmail.com>
* elf32-m32r.c (m32r_elf_section_flags): New function.

3
bfd/coff-alpha.c
View File

@ -2424,7 +2424,8 @@ const bfd_target alpha_ecoff_le_vec =
| HAS_LINENO | HAS_DEBUG
| HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE
| SEC_DATA | SEC_SMALL_DATA),
0, /* leading underscore */
' ', /* ar_pad_char */
15, /* ar_max_namelen */

9
bfd/coff-mips.c
View File

@ -1440,7 +1440,8 @@ const bfd_target mips_ecoff_le_vec =
| HAS_LINENO | HAS_DEBUG
| HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE
| SEC_DATA | SEC_SMALL_DATA),
0, /* leading underscore */
' ', /* ar_pad_char */
15, /* ar_max_namelen */
@ -1497,7 +1498,8 @@ const bfd_target mips_ecoff_be_vec =
| HAS_LINENO | HAS_DEBUG
| HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE
| SEC_DATA | SEC_SMALL_DATA),
0, /* leading underscore */
' ', /* ar_pad_char */
15, /* ar_max_namelen */
@ -1554,7 +1556,8 @@ const bfd_target mips_ecoff_bele_vec =
| HAS_LINENO | HAS_DEBUG
| HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE
| SEC_DATA | SEC_SMALL_DATA),
0, /* leading underscore */
' ', /* ar_pad_char */
15, /* ar_max_namelen */

12
bfd/coffcode.h
View File

@ -717,7 +717,7 @@ sec_to_styp_flags (const char *sec_name, flagword sec_flags)
#ifndef COFF_WITH_PE
static bfd_boolean
styp_to_sec_flags (bfd *abfd ATTRIBUTE_UNUSED,
styp_to_sec_flags (bfd *abfd,
void * hdr,
const char *name,
asection *section ATTRIBUTE_UNUSED,
@ -850,6 +850,11 @@ styp_to_sec_flags (bfd *abfd ATTRIBUTE_UNUSED,
sec_flags = (SEC_LOAD | SEC_ALLOC);
#endif /* STYP_SDATA */
if ((bfd_applicable_section_flags (abfd) & SEC_SMALL_DATA) != 0
&& (CONST_STRNEQ (name, ".sbss")
|| CONST_STRNEQ (name, ".sdata")))
sec_flags |= SEC_SMALL_DATA;
#if defined (COFF_LONG_SECTION_NAMES) && defined (COFF_SUPPORT_GNU_LINKONCE)
/* As a GNU extension, if the name begins with .gnu.linkonce, we
only link a single copy of the section. This is used to support
@ -1312,6 +1317,11 @@ styp_to_sec_flags (bfd *abfd,
}
}
if ((bfd_applicable_section_flags (abfd) & SEC_SMALL_DATA) != 0
&& (CONST_STRNEQ (name, ".sbss")
|| CONST_STRNEQ (name, ".sdata")))
sec_flags |= SEC_SMALL_DATA;
#if defined (COFF_LONG_SECTION_NAMES) && defined (COFF_SUPPORT_GNU_LINKONCE)
/* As a GNU extension, if the name begins with .gnu.linkonce, we
only link a single copy of the section. This is used to support

17
bfd/ecoff.c
View File

@ -156,14 +156,14 @@ _bfd_ecoff_new_section_hook (bfd *abfd, asection *section)
{ _INIT, SEC_ALLOC | SEC_CODE | SEC_LOAD },
{ _FINI, SEC_ALLOC | SEC_CODE | SEC_LOAD },
{ _DATA, SEC_ALLOC | SEC_DATA | SEC_LOAD },
{ _SDATA, SEC_ALLOC | SEC_DATA | SEC_LOAD },
{ _SDATA, SEC_ALLOC | SEC_DATA | SEC_LOAD | SEC_SMALL_DATA },
{ _RDATA, SEC_ALLOC | SEC_DATA | SEC_LOAD | SEC_READONLY},
{ _LIT8, SEC_ALLOC | SEC_DATA | SEC_LOAD | SEC_READONLY},
{ _LIT4, SEC_ALLOC | SEC_DATA | SEC_LOAD | SEC_READONLY},
{ _LIT8, SEC_ALLOC | SEC_DATA | SEC_LOAD | SEC_READONLY | SEC_SMALL_DATA},
{ _LIT4, SEC_ALLOC | SEC_DATA | SEC_LOAD | SEC_READONLY | SEC_SMALL_DATA},
{ _RCONST, SEC_ALLOC | SEC_DATA | SEC_LOAD | SEC_READONLY},
{ _PDATA, SEC_ALLOC | SEC_DATA | SEC_LOAD | SEC_READONLY},
{ _BSS, SEC_ALLOC},
{ _SBSS, SEC_ALLOC},
{ _SBSS, SEC_ALLOC | SEC_SMALL_DATA},
/* An Irix 4 shared libary. */
{ _LIB, SEC_COFF_SHARED_LIBRARY}
};
@ -412,16 +412,19 @@ _bfd_ecoff_styp_to_sec_flags (bfd *abfd ATTRIBUTE_UNUSED,
|| styp_flags == STYP_PDATA
|| styp_flags == STYP_RCONST)
sec_flags |= SEC_READONLY;
if (styp_flags & STYP_SDATA)
sec_flags |= SEC_SMALL_DATA;
}
else if ((styp_flags & STYP_BSS)
|| (styp_flags & STYP_SBSS))
else if (styp_flags & STYP_SBSS)
sec_flags |= SEC_ALLOC | SEC_SMALL_DATA;
else if (styp_flags & STYP_BSS)
sec_flags |= SEC_ALLOC;
else if ((styp_flags & STYP_INFO) || styp_flags == STYP_COMMENT)
sec_flags |= SEC_NEVER_LOAD;
else if ((styp_flags & STYP_LITA)
|| (styp_flags & STYP_LIT8)
|| (styp_flags & STYP_LIT4))
sec_flags |= SEC_DATA | SEC_LOAD | SEC_ALLOC | SEC_READONLY;
sec_flags |= SEC_DATA |SEC_SMALL_DATA | SEC_LOAD | SEC_ALLOC | SEC_READONLY;
else if (styp_flags & STYP_ECOFF_LIB)
sec_flags |= SEC_COFF_SHARED_LIBRARY;
else

11
gas/ChangeLog
View File

@ -1,3 +1,14 @@
2020-03-02 Alan Modra <amodra@gmail.com>
* config/tc-m32r.c (md_begin): Set SEC_SMALL_DATA on .scommon section.
* config/tc-mips.c (s_change_sec): Set SEC_SMALL_DATA for .sdata
and .sbss sections.
* config/tc-score.c: Delete !BFD_ASSEMBLER code throughout.
(s3_s_change_sec): Set SEC_SMALL_DATA for .sbss section.
(s3_s_score_lcomm): Likewise.
* config/tc-score7.c: Similarly.
* read.c (bss_alloc): Set SEC_SMALL_DATA for .sbss section.
2020-02-28 YunQiang Su <syq@debian.org>
PR gas/25539

4
gas/config/tc-m32r.c
View File

@ -713,7 +713,8 @@ md_begin (void)
/* This is copied from perform_an_assembly_pass. */
applicable = bfd_applicable_section_flags (stdoutput);
bfd_set_section_flags (sbss_section, applicable & SEC_ALLOC);
bfd_set_section_flags (sbss_section,
applicable & (SEC_ALLOC | SEC_SMALL_DATA));
subseg_set (seg, subseg);
@ -721,6 +722,7 @@ md_begin (void)
but with the name .scommon. */
scom_section = *bfd_com_section_ptr;
scom_section.name = ".scommon";
scom_section.flags = SEC_IS_COMMON | SEC_SMALL_DATA;
scom_section.output_section = & scom_section;
scom_section.symbol = & scom_symbol;
scom_section.symbol_ptr_ptr = & scom_section.symbol;

6
gas/config/tc-mips.c
View File

@ -16365,8 +16365,8 @@ s_change_sec (int sec)
case 's':
seg = subseg_new (".sdata", (subsegT) get_absolute_expression ());
bfd_set_section_flags (seg,
SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA);
bfd_set_section_flags (seg, (SEC_ALLOC | SEC_LOAD | SEC_RELOC
| SEC_DATA | SEC_SMALL_DATA));
if (strncmp (TARGET_OS, "elf", 3) != 0)
record_alignment (seg, 4);
demand_empty_rest_of_line ();
@ -16374,7 +16374,7 @@ s_change_sec (int sec)
case 'B':
seg = subseg_new (".sbss", (subsegT) get_absolute_expression ());
bfd_set_section_flags (seg, SEC_ALLOC);
bfd_set_section_flags (seg, SEC_ALLOC | SEC_SMALL_DATA);
if (strncmp (TARGET_OS, "elf", 3) != 0)
record_alignment (seg, 4);
demand_empty_rest_of_line ();

28
gas/config/tc-score.c
View File

@ -5569,14 +5569,16 @@ s3_s_change_sec (int sec)
{
case 'r':
seg = subseg_new (s3_RDATA_SECTION_NAME, (subsegT) get_absolute_expression ());
bfd_set_section_flags (seg, (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_RELOC | SEC_DATA));
bfd_set_section_flags (seg, (SEC_ALLOC | SEC_LOAD | SEC_READONLY
| SEC_RELOC | SEC_DATA));
if (strcmp (TARGET_OS, "elf") != 0)
record_alignment (seg, 4);
demand_empty_rest_of_line ();
break;
case 's':
seg = subseg_new (".sdata", (subsegT) get_absolute_expression ());
bfd_set_section_flags (seg, SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA);
bfd_set_section_flags (seg, (SEC_ALLOC | SEC_LOAD | SEC_RELOC
| SEC_DATA | SEC_SMALL_DATA));
if (strcmp (TARGET_OS, "elf") != 0)
record_alignment (seg, 4);
demand_empty_rest_of_line ();
@ -5685,17 +5687,10 @@ s3_s_score_ent (int aent)
if (ISDIGIT (*input_line_pointer) || *input_line_pointer == '-')
s3_get_number ();
#ifdef BFD_ASSEMBLER
if ((bfd_section_flags (now_seg) & SEC_CODE) != 0)
maybe_text = 1;
else
maybe_text = 0;
#else
if (now_seg != data_section && now_seg != bss_section)
maybe_text = 1;
else
maybe_text = 0;
#endif
if (!maybe_text)
as_warn (_(".ent or .aent not in text section."));
if (!aent && s3_cur_proc_ptr)
@ -5794,17 +5789,10 @@ s3_s_score_end (int x ATTRIBUTE_UNUSED)
else
p = NULL;
#ifdef BFD_ASSEMBLER
if ((bfd_section_flags (now_seg) & SEC_CODE) != 0)
maybe_text = 1;
else
maybe_text = 0;
#else
if (now_seg != data_section && now_seg != bss_section)
maybe_text = 1;
else
maybe_text = 0;
#endif
if (!maybe_text)
as_warn (_(".end not in text section"));
@ -6132,11 +6120,9 @@ s3_s_score_lcomm (int bytes_p)
{
bss_seg = subseg_new (".sbss", 1);
seg_info (bss_seg)->bss = 1;
#ifdef BFD_ASSEMBLER
if (!bfd_set_section_flags (bss_seg, SEC_ALLOC))
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
}
}
#endif
@ -6215,12 +6201,8 @@ s3_s_score_lcomm (int bytes_p)
if (
#if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
#ifdef BFD_ASSEMBLER
(OUTPUT_FLAVOR != bfd_target_aout_flavour
|| (S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0)) &&
#else
(S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0) &&
#endif
#endif
(S_GET_SEGMENT (symbolP) == bss_seg || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0)))
{

31
gas/config/tc-score7.c
View File

@ -5422,14 +5422,16 @@ s7_s_change_sec (int sec)
{
case 'r':
seg = subseg_new (s7_RDATA_SECTION_NAME, (subsegT) get_absolute_expression ());
bfd_set_section_flags (seg, (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_RELOC | SEC_DATA));
bfd_set_section_flags (seg, (SEC_ALLOC | SEC_LOAD | SEC_READONLY
| SEC_RELOC | SEC_DATA));
if (strcmp (TARGET_OS, "elf") != 0)
record_alignment (seg, 4);
demand_empty_rest_of_line ();
break;
case 's':
seg = subseg_new (".sdata", (subsegT) get_absolute_expression ());
bfd_set_section_flags (seg, SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA);
bfd_set_section_flags (seg, (SEC_ALLOC | SEC_LOAD | SEC_RELOC
| SEC_DATA | SEC_SMALL_DATA));
if (strcmp (TARGET_OS, "elf") != 0)
record_alignment (seg, 4);
demand_empty_rest_of_line ();
@ -5539,17 +5541,10 @@ s7_s_score_ent (int aent)
if (ISDIGIT (*input_line_pointer) || *input_line_pointer == '-')
s7_get_number ();
#ifdef BFD_ASSEMBLER
if ((bfd_section_flags (now_seg) & SEC_CODE) != 0)
maybe_text = 1;
else
maybe_text = 0;
#else
if (now_seg != data_section && now_seg != bss_section)
maybe_text = 1;
else
maybe_text = 0;
#endif
if (!maybe_text)
as_warn (_(".ent or .aent not in text section."));
if (!aent && s7_cur_proc_ptr)
@ -5649,17 +5644,10 @@ s7_s_score_end (int x ATTRIBUTE_UNUSED)
else
p = NULL;
#ifdef BFD_ASSEMBLER
if ((bfd_section_flags (now_seg) & SEC_CODE) != 0)
maybe_text = 1;
else
maybe_text = 0;
#else
if (now_seg != data_section && now_seg != bss_section)
maybe_text = 1;
else
maybe_text = 0;
#endif
if (!maybe_text)
as_warn (_(".end not in text section"));
@ -5992,10 +5980,9 @@ s7_s_score_lcomm (int bytes_p)
{
bss_seg = subseg_new (".sbss", 1);
seg_info (bss_seg)->bss = 1;
#ifdef BFD_ASSEMBLER
if (!bfd_set_section_flags (bss_seg, SEC_ALLOC))
as_warn (_("error setting flags for \".sbss\": %s"), bfd_errmsg (bfd_get_error ()));
#endif
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
@ -6074,12 +6061,8 @@ s7_s_score_lcomm (int bytes_p)
if (
#if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT))
#ifdef BFD_ASSEMBLER
(OUTPUT_FLAVOR != bfd_target_aout_flavour
|| (S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0)) &&
#else
(S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0) &&
#endif
#endif
(S_GET_SEGMENT (symbolP) == bss_seg || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0)))
{

2
gas/read.c
View File

@ -2465,7 +2465,7 @@ bss_alloc (symbolS *symbolP, addressT size, unsigned int align)
{
bss_seg = subseg_new (".sbss", 1);
seg_info (bss_seg)->bss = 1;
if (!bfd_set_section_flags (bss_seg, SEC_ALLOC))
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 ()));
}