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aarch64: Add support for GCS to AArch64 linker

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This patch adds support for Guarded Control Stack in AArch64 linker.

This patch implements the following:
1) Defines GNU_PROPERTY_AARCH64_FEATURE_1_GCS bit for GCS in
GNU_PROPERTY_AARCH64_FEATURE_1_AND macro.

2) Adds readelf support to read and print the GNU properties
in AArch64.

Displaying notes found in: .note.gnu.property
[      ]+Owner[        ]+Data size[    ]+Description
  GNU                  0x00000010      NT_GNU_PROPERTY_TYPE_0
      Properties: AArch64 feature: GCS

3) Adds support for the "-z gcs" linker option and document all the values
allowed with this option (-z gcs[=always|never|implicit]) where "-z gcs" is
equivalent to "-z gcs=always" and when this option is not passed in the
command line, it defaults to "implicit".

4) Adds support for the "-z gcs-report" linker option and document all the
values allowed with this option (-z gcs-report[=none|warning|error]) where
"-z gcs-report" is equivalent to "-z gcs-report=none" and when this option
is not passed in the command line, it defaults to "none".

The ABI changes adding GNU_PROPERTY_AARCH64_FEATURE_1_GCS to the
GNU property GNU_PROPERTY_AARCH64_FEATURE_1_AND is merged into main and
can be found in [1].

[1] https://github.com/ARM-software/abi-aa/blob/main/sysvabi64/sysvabi64.rst

Co-authored-by: Matthieu Longo <matthieu.longo@arm.com>
Co-authored-by: Yury Khrustalev <yury.khrustalev@arm.com>
This commit is contained in:
Srinath Parvathaneni 2024-10-16 15:42:08 +01:00 committed by Andre Vieira
parent a9ed7a0814
commit 8d59fa447f
33 changed files with 506 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

93
bfd/elfnn-aarch64.c
View File

@ -2546,6 +2546,12 @@ struct elf_aarch64_obj_tdata
GNU_PROPERTY_AARCH64_FEATURE_1_BTI. */
int no_bti_warn;
/* Mark output with GCS based on -z gcs. */
aarch64_gcs_type gcs_type;
/* Report linker warning/error for -z gcs-report based on
-z gcs. */
aarch64_gcs_report gcs_report;
/* PLT type based on security. */
aarch64_plt_type plt_type;
};
@ -5024,7 +5030,7 @@ bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
int fix_erratum_835769,
erratum_84319_opts fix_erratum_843419,
int no_apply_dynamic_relocs,
aarch64_bti_pac_info bp_info)
aarch64_gnu_prop_info gnu_prop_info)
{
struct elf_aarch64_link_hash_table *globals;
@ -5041,7 +5047,7 @@ bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
switch (bp_info.bti_type)
switch (gnu_prop_info.bti_type)
{
case BTI_WARN:
elf_aarch64_tdata (output_bfd)->no_bti_warn = 0;
@ -5052,8 +5058,26 @@ bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
default:
break;
}
elf_aarch64_tdata (output_bfd)->plt_type = bp_info.plt_type;
setup_plt_values (link_info, bp_info.plt_type);
switch (gnu_prop_info.gcs_type)
{
case GCS_ALWAYS:
elf_aarch64_tdata (output_bfd)->gnu_and_prop
|= GNU_PROPERTY_AARCH64_FEATURE_1_GCS;
break;
case GCS_NEVER:
elf_aarch64_tdata (output_bfd)->gnu_and_prop
&= ~GNU_PROPERTY_AARCH64_FEATURE_1_GCS;
break;
default:
break;
}
elf_aarch64_tdata (output_bfd)->gcs_type = gnu_prop_info.gcs_type;
elf_aarch64_tdata (output_bfd)->gcs_report = gnu_prop_info.gcs_report;
elf_aarch64_tdata (output_bfd)->plt_type = gnu_prop_info.plt_type;
setup_plt_values (link_info, gnu_prop_info.plt_type);
}
static bfd_vma
@ -10619,7 +10643,12 @@ static bfd *
elfNN_aarch64_link_setup_gnu_properties (struct bfd_link_info *info)
{
uint32_t prop = elf_aarch64_tdata (info->output_bfd)->gnu_and_prop;
bfd *pbfd = _bfd_aarch64_elf_link_setup_gnu_properties (info, &prop);
aarch64_gcs_report gcs_report
= elf_aarch64_tdata (info->output_bfd)->gcs_report;
aarch64_gcs_type gcs_type
= elf_aarch64_tdata (info->output_bfd)->gcs_type;
bfd *pbfd = _bfd_aarch64_elf_link_setup_gnu_properties (info, &prop,
gcs_report, gcs_type);
elf_aarch64_tdata (info->output_bfd)->gnu_and_prop = prop;
elf_aarch64_tdata (info->output_bfd)->plt_type
|= (prop & GNU_PROPERTY_AARCH64_FEATURE_1_BTI) ? PLT_BTI : 0;
@ -10638,30 +10667,54 @@ elfNN_aarch64_merge_gnu_properties (struct bfd_link_info *info,
{
uint32_t prop
= elf_aarch64_tdata (info->output_bfd)->gnu_and_prop;
aarch64_gcs_report gcs_report
= elf_aarch64_tdata (info->output_bfd)->gcs_report;
aarch64_gcs_type gcs_type
= elf_aarch64_tdata (info->output_bfd)->gcs_type;
/* If output has been marked with BTI using command line argument, give out
warning if necessary. */
/* Properties are merged per type, hence only check for warnings when merging
GNU_PROPERTY_AARCH64_FEATURE_1_AND. */
if (((aprop && aprop->pr_type == GNU_PROPERTY_AARCH64_FEATURE_1_AND)
if ((aprop && aprop->pr_type == GNU_PROPERTY_AARCH64_FEATURE_1_AND)
|| (bprop && bprop->pr_type == GNU_PROPERTY_AARCH64_FEATURE_1_AND))
&& (prop & GNU_PROPERTY_AARCH64_FEATURE_1_BTI)
&& (!elf_aarch64_tdata (info->output_bfd)->no_bti_warn))
{
if ((aprop && !(aprop->u.number & GNU_PROPERTY_AARCH64_FEATURE_1_BTI))
|| !aprop)
/* If output has been marked with BTI using command line argument, give
out warning if necessary. */
if ((prop & GNU_PROPERTY_AARCH64_FEATURE_1_BTI)
&& (!elf_aarch64_tdata (info->output_bfd)->no_bti_warn))
{
_bfd_error_handler (_("%pB: warning: BTI turned on by -z force-bti when "
"all inputs do not have BTI in NOTE section."),
abfd);
if ((aprop && !(aprop->u.number & GNU_PROPERTY_AARCH64_FEATURE_1_BTI))
|| !aprop)
{
_bfd_error_handler (_("%pB: warning: BTI turned on by -z "
"force-bti when all inputs do not have BTI "
"in NOTE section."), abfd);
}
if ((bprop && !(bprop->u.number & GNU_PROPERTY_AARCH64_FEATURE_1_BTI))
|| !bprop)
{
_bfd_error_handler (_("%pB: warning: BTI turned on by -z "
"force-bti when all inputs do not have BTI "
"in NOTE section."), bbfd);
}
}
if ((bprop && !(bprop->u.number & GNU_PROPERTY_AARCH64_FEATURE_1_BTI))
|| !bprop)
/* If output has been marked with GCS using -z gcs and input
is missing GCS marking throw warning/error on
-z gcs-report=warning/error. */
if ((prop & GNU_PROPERTY_AARCH64_FEATURE_1_GCS) && gcs_report != GCS_NONE)
{
_bfd_error_handler (_("%pB: warning: BTI turned on by -z force-bti when "
"all inputs do not have BTI in NOTE section."),
bbfd);
if ((aprop && !(aprop->u.number & GNU_PROPERTY_AARCH64_FEATURE_1_GCS))
|| !aprop)
_bfd_aarch64_elf_check_gcs_report (gcs_report, abfd);
if ((bprop && !(bprop->u.number & GNU_PROPERTY_AARCH64_FEATURE_1_GCS))
|| !bprop)
_bfd_aarch64_elf_check_gcs_report (gcs_report, bbfd);
}
if (gcs_type == GCS_NEVER && aprop != NULL)
aprop->u.number &= ~GNU_PROPERTY_AARCH64_FEATURE_1_GCS;
if (gcs_type == GCS_NEVER && bprop != NULL)
bprop->u.number &= ~GNU_PROPERTY_AARCH64_FEATURE_1_GCS;
}
return _bfd_aarch64_elf_merge_gnu_properties (info, abfd, aprop,

37
bfd/elfxx-aarch64.c
View File

@ -702,7 +702,9 @@ _bfd_aarch64_elf_write_core_note (bfd *abfd, char *buf, int *bufsiz, int note_ty
GPROP accordingly. */
bfd *
_bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *info,
uint32_t *gprop)
uint32_t *gprop,
aarch64_gcs_report gcs_report,
aarch64_gcs_type gcs_type)
{
asection *sec;
bfd *pbfd;
@ -738,6 +740,11 @@ _bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *info,
_bfd_error_handler (_("%pB: warning: BTI turned on by -z force-bti "
"when all inputs do not have BTI in NOTE "
"section."), ebfd);
if ((gnu_prop & GNU_PROPERTY_AARCH64_FEATURE_1_GCS)
&& !(prop->u.number & GNU_PROPERTY_AARCH64_FEATURE_1_GCS))
_bfd_aarch64_elf_check_gcs_report (gcs_report, ebfd);
prop->u.number |= gnu_prop;
prop->pr_kind = property_number;
@ -765,6 +772,14 @@ _bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *info,
elf_section_type (sec) = SHT_NOTE;
}
}
else if (ebfd != NULL && gcs_type == GCS_NEVER)
{
prop = _bfd_elf_get_property (ebfd, GNU_PROPERTY_AARCH64_FEATURE_1_AND,
4);
prop->u.number &= ~GNU_PROPERTY_AARCH64_FEATURE_1_GCS;
if (prop->u.number == 0)
prop->pr_kind = property_remove;
}
pbfd = _bfd_elf_link_setup_gnu_properties (info);
@ -785,7 +800,8 @@ _bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *info,
{
gnu_prop = (p->property.u.number
& (GNU_PROPERTY_AARCH64_FEATURE_1_PAC
| GNU_PROPERTY_AARCH64_FEATURE_1_BTI));
| GNU_PROPERTY_AARCH64_FEATURE_1_BTI
| GNU_PROPERTY_AARCH64_FEATURE_1_GCS));
break;
}
else if (GNU_PROPERTY_AARCH64_FEATURE_1_AND < p->property.pr_type)
@ -922,3 +938,20 @@ _bfd_aarch64_elf_link_fixup_gnu_properties
}
}
}
/* Check AArch64 GCS report. */
void
_bfd_aarch64_elf_check_gcs_report (aarch64_gcs_report gcs_report, bfd *ebfd)
{
if (gcs_report == GCS_WARN)
_bfd_error_handler (_("%pB: warning: GCS turned on by -z gcs "
"on the output when all inputs do not have GCS in NOTE "
"section."), ebfd);
else if (gcs_report == GCS_ERROR)
{
_bfd_error_handler (_("%pB: error: GCS turned on by -z gcs "
"on the output when all inputs do not have GCS in "
"NOTE section."), ebfd);
_exit (EXIT_FAILURE);
}
}

36
bfd/elfxx-aarch64.h
View File

@ -46,6 +46,27 @@ typedef enum
BTI_WARN = 1, /* BTI is enabled with -z force-bti. */
} aarch64_enable_bti_type;
/* To indicate whether GNU_PROPERTY_AARCH64_FEATURE_1_GCS bit is
enabled/disabled on the output when -z gcs linker
command line option is passed. */
typedef enum
{
GCS_NEVER = 0, /* gcs is disabled on output. */
GCS_IMPLICIT = 1, /* gcs is deduced from input object. */
GCS_ALWAYS = 2, /* gsc is enabled on output. */
} aarch64_gcs_type;
/* To indicate whether to generate linker warning/errors for
-z gcs-report when -z gcs=always is passed. */
typedef enum
{
GCS_NONE = 0, /* Does not emit any warning/error messages. */
GCS_WARN = 1, /* Emit warning when the input objects are missing gcs
markings and output have gcs marking. */
GCS_ERROR = 2, /* Emit error when the input objects are missing gcs
markings and output have gcs marking. */
} aarch64_gcs_report;
/* A structure to encompass all information coming from BTI or PAC
related command line options. This involves the "PLT_TYPE" to determine
which version of PLTs to pick and "BTI_TYPE" to determine if
@ -54,7 +75,9 @@ typedef struct
{
aarch64_plt_type plt_type;
aarch64_enable_bti_type bti_type;
} aarch64_bti_pac_info;
aarch64_gcs_type gcs_type;
aarch64_gcs_report gcs_report;
} aarch64_gnu_prop_info;
/* An enum to define what kind of erratum fixes we should apply. This gives the
user a bit more control over the sequences we generate. */
@ -67,11 +90,11 @@ typedef enum
extern void bfd_elf64_aarch64_set_options
(bfd *, struct bfd_link_info *, int, int, int, int, erratum_84319_opts, int,
aarch64_bti_pac_info);
aarch64_gnu_prop_info);
extern void bfd_elf32_aarch64_set_options
(bfd *, struct bfd_link_info *, int, int, int, int, erratum_84319_opts, int,
aarch64_bti_pac_info);
aarch64_gnu_prop_info);
/* AArch64 stub generation support for ELF64. Called from the linker. */
extern int elf64_aarch64_setup_section_lists
@ -146,8 +169,9 @@ _bfd_aarch64_elf_write_core_note (bfd *, char *, int *, int, ...);
#define elf_backend_write_core_note _bfd_aarch64_elf_write_core_note
extern bfd *
_bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *,
uint32_t *);
_bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *, uint32_t *,
aarch64_gcs_report,
aarch64_gcs_type);
extern enum elf_property_kind
_bfd_aarch64_elf_parse_gnu_properties (bfd *, unsigned int,
@ -157,6 +181,8 @@ extern bool
_bfd_aarch64_elf_merge_gnu_properties (struct bfd_link_info *, bfd *,
elf_property *, elf_property *,
uint32_t);
extern void
_bfd_aarch64_elf_check_gcs_report (aarch64_gcs_report, bfd *);
extern void
_bfd_aarch64_elf_link_fixup_gnu_properties (struct bfd_link_info *,

4
binutils/readelf.c
View File

@ -21246,6 +21246,10 @@ decode_aarch64_feature_1_and (unsigned int bitmask)
printf ("PAC");
break;
case GNU_PROPERTY_AARCH64_FEATURE_1_GCS:
printf ("GCS");
break;
default:
printf (_("<unknown: %x>"), bit);
break;

1
include/elf/common.h
View File

@ -1037,6 +1037,7 @@
#define GNU_PROPERTY_AARCH64_FEATURE_1_BTI (1U << 0)
#define GNU_PROPERTY_AARCH64_FEATURE_1_PAC (1U << 1)
#define GNU_PROPERTY_AARCH64_FEATURE_1_GCS (1U << 2)
/* Values used in GNU .note.ABI-tag notes (NT_GNU_ABI_TAG). */
#define GNU_ABI_TAG_LINUX 0

58
ld/emultempl/aarch64elf.em
View File

@ -36,6 +36,15 @@ static erratum_84319_opts fix_erratum_843419 = ERRAT_NONE;
static int no_apply_dynamic_relocs = 0;
static aarch64_plt_type plt_type = PLT_NORMAL;
static aarch64_enable_bti_type bti_type = BTI_NONE;
static aarch64_gcs_type gcs_type = GCS_IMPLICIT;
static aarch64_gcs_report gcs_report = GCS_NONE;
#define COMPILE_TIME_STRLEN(s) \
(sizeof(s) - 1)
#define EGR "gcs-report"
#define EG "gcs"
#define EGR_LEN COMPILE_TIME_STRLEN (EGR)
#define EG_LEN COMPILE_TIME_STRLEN (EG)
static void
gld${EMULATION_NAME}_before_parse (void)
@ -321,9 +330,11 @@ aarch64_elf_create_output_section_statements (void)
return;
}
aarch64_bti_pac_info bp_info;
bp_info.plt_type = plt_type;
bp_info.bti_type = bti_type;
aarch64_gnu_prop_info gnu_prop_info;
gnu_prop_info.plt_type = plt_type;
gnu_prop_info.bti_type = bti_type;
gnu_prop_info.gcs_type = gcs_type;
gnu_prop_info.gcs_report = gcs_report;
bfd_elf${ELFSIZE}_aarch64_set_options (link_info.output_bfd, &link_info,
no_enum_size_warning,
@ -331,7 +342,7 @@ aarch64_elf_create_output_section_statements (void)
pic_veneer,
fix_erratum_835769, fix_erratum_843419,
no_apply_dynamic_relocs,
bp_info);
gnu_prop_info);
stub_file = lang_add_input_file ("linker stubs",
lang_input_file_is_fake_enum,
@ -398,16 +409,51 @@ PARSE_AND_LIST_OPTIONS='
fprintf (file, _(" --no-apply-dynamic-relocs Do not apply link-time values for dynamic relocations\n"));
fprintf (file, _(" -z force-bti Turn on Branch Target Identification mechanism and generate PLTs with BTI. Generate warnings for missing BTI on inputs\n"));
fprintf (file, _(" -z pac-plt Protect PLTs with Pointer Authentication.\n"));
fprintf (file, _("\
-z gcs[=always|never|implicit] Turn on Guarded Control Stack(gcs) mechanism on the output.\n\
implicit(default): deduce gcs from input objects.\n\
always: always marks the output with gcs.\n\
never: never marks the output with gcs.\n"));
fprintf (file, _("\
-z gcs-report[=none|warning|error] Emit warning/error on mismatch of gcs marking between input objects and ouput.\n\
none (default): Does not emit any warning/error messages.\n\
warning: Emit warning when the input objects are missing gcs markings\n\
and output have gcs marking.\n\
error: Emit error when the input objects are missing gcs markings\n\
and output have gcs marking.\n"));
'
PARSE_AND_LIST_ARGS_CASE_Z_AARCH64='
else if (strcmp (optarg, "force-bti") == 0)
else if (strcmp (optarg, "force-bti") == 0)
{
plt_type |= PLT_BTI;
bti_type = BTI_WARN;
}
else if (strcmp (optarg, "pac-plt") == 0)
else if (strcmp (optarg, "pac-plt") == 0)
plt_type |= PLT_PAC;
else if (strncmp (optarg, EGR, EGR_LEN) == 0)
{
if (strlen (optarg) == EGR_LEN || strcmp (optarg + EGR_LEN, "=none") == 0)
gcs_report = GCS_NONE;
else if (strcmp (optarg + EGR_LEN, "=warning") == 0)
gcs_report = GCS_WARN;
else if (strcmp (optarg + EGR_LEN, "=error") == 0)
gcs_report = GCS_ERROR;
else
einfo (_("%P: error: unrecognized: `%s'\''\n"), optarg);
}
else if (strncmp (optarg, EG, EG_LEN) == 0)
{
if (strlen (optarg) == EG_LEN || strcmp (optarg + EG_LEN, "=always") == 0)
gcs_type = GCS_ALWAYS;
else if (strcmp (optarg + EG_LEN, "=never") == 0)
gcs_type = GCS_NEVER;
else if (strcmp (optarg + EG_LEN, "=implicit") == 0)
gcs_type = GCS_IMPLICIT;
else
einfo (_("%P: error: unrecognized: `%s'\''\n"), optarg);
}
'
PARSE_AND_LIST_ARGS_CASE_Z="$PARSE_AND_LIST_ARGS_CASE_Z $PARSE_AND_LIST_ARGS_CASE_Z_AARCH64"

23
ld/testsuite/ld-aarch64/aarch64-elf.exp
View File

@ -487,3 +487,26 @@ if { [supports_dt_relr] } {
if { ![skip_sframe_tests] } {
run_dump_test "sframe-simple-1"
}
run_dump_test "property-gcs1"
run_dump_test "property-gcs2"
run_dump_test "property-gcs3"
run_dump_test "property-gcs4"
run_dump_test "property-gcs5"
run_dump_test "property-gcs6"
run_dump_test "property-gcs7"
run_dump_test "property-gcs8"
run_dump_test "property-gcs9"
run_dump_test "property-gcs10"
run_dump_test "property-gcs11"
run_dump_test "property-gcs12"
run_dump_test "property-gcs13"
run_dump_test "property-gcs14"
run_dump_test "property-gcs15"
run_dump_test "property-gcs16"
run_dump_test "property-gcs17"
run_dump_test "property-gcs18"
run_dump_test "property-gcs19"
run_dump_test "property-gcs20"
run_dump_test "property-gcs21"
run_dump_test "property-gcs22"

2
ld/testsuite/ld-aarch64/property-bti-pac1.d
View File

@ -8,4 +8,4 @@
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: BTI, PAC
Properties: AArch64 feature: BTI, PAC, GCS

14
ld/testsuite/ld-aarch64/property-bti-pac1.s
View File

@ -12,6 +12,20 @@ _start:
.long 5f - 2f /* data length */
.long 5 /* note type */
0: .asciz "GNU" /* vendor name */
1:
.p2align 3
2: .long 0xc0000000 /* pr_type. */
.long 4f - 3f /* pr_datasz. */
3:
.long 0x4 /* GCS. */
4:
.p2align 3
5:
.p2align 3
.long 1f - 0f /* name length */
.long 5f - 2f /* data length */
.long 5 /* note type */
0: .asciz "GNU" /* vendor name */
1:
.p2align 3
2: .long 0xc0000000 /* pr_type. */

25
ld/testsuite/ld-aarch64/property-gcs.s Normal file
View File

@ -0,0 +1,25 @@
.text
.globl _start
.type _start,@function
_start:
mov x1, #2
.ifndef __mult__
bl foo
.endif
.ifdef __property_gcs__
.section ".note.gnu.property", "a"
.p2align 3
.long 1f - 0f /* name length */
.long 5f - 2f /* data length */
.long 5 /* note type */
0: .asciz "GNU" /* vendor name */
1:
.p2align 3
2: .long 0xc0000000 /* pr_type. */
.long 4f - 3f /* pr_datasz. */
3:
.long 0x4 /* GCS. */
4:
.p2align 3
5:
.endif

6
ld/testsuite/ld-aarch64/property-gcs1.d Normal file
View File

@ -0,0 +1,6 @@
#name: GNU Property (input without gcs)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0
#ld: -shared
#readelf: -n

6
ld/testsuite/ld-aarch64/property-gcs10.d Normal file
View File

@ -0,0 +1,6 @@
#name: GNU Property (input without gcs output forced with gcs=always gcs-report=error)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0
#ld: -z gcs=always -z gcs-report=error
#error: .*property-gcs.*: error: GCS turned on by -z gcs on the output when all inputs do not have GCS in NOTE section.

11
ld/testsuite/ld-aarch64/property-gcs11.d Normal file
View File

@ -0,0 +1,11 @@
#name: GNU Property (input with gcs output forced with gcs)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0 -defsym __property_gcs__=1
#ld: -z gcs
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

11
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#name: GNU Property (input with gcs output forced with gcs=always)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0 -defsym __property_gcs__=1
#ld: -z gcs=always
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

11
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@ -0,0 +1,11 @@
#name: GNU Property (input with gcs output forced with gcs gcs-report=none)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0 -defsym __property_gcs__=1
#ld: -z gcs -z gcs-report=none
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

11
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#name: GNU Property (input with gcs output forced with gcs gcs-report=warning)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0 -defsym __property_gcs__=1
#ld: -z gcs -z gcs-report=warning
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

11
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#name: GNU Property (input with gcs output forced with gcs gcs-report=error)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0 -defsym __property_gcs__=1
#ld: -z gcs -z gcs-report=error
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

11
ld/testsuite/ld-aarch64/property-gcs16.d Normal file
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@ -0,0 +1,11 @@
#name: GNU Property (input with gcs output forced with gcs=always gcs-report=none)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0 -defsym __property_gcs__=1
#ld: -z gcs=always -z gcs-report=none
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

11
ld/testsuite/ld-aarch64/property-gcs17.d Normal file
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@ -0,0 +1,11 @@
#name: GNU Property (input with gcs output forced with gcs=always gcs-report=warning)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0 -defsym __property_gcs__=1
#ld: -z gcs=always -z gcs-report=warning
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

11
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@ -0,0 +1,11 @@
#name: GNU Property (input with gcs output forced with gcs=always gcs-report=error)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0 -defsym __property_gcs__=1
#ld: -z gcs=always -z gcs-report=error
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

6
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@ -0,0 +1,6 @@
#name: GNU Property (input without gcs output forced with gcs=never)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0
#ld: -z gcs=never
#readelf: -n

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#name: GNU Property (input with gcs)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0 -defsym __property_gcs__=1
#ld: -shared
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

33
ld/testsuite/ld-aarch64/property-gcs2.s Normal file
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.text
.global foo
.type foo, %function
foo:
sub sp, sp, #16
mov w0, 9
str w0, [sp, 12]
ldr w0, [sp, 12]
add w0, w0, 4
str w0, [sp, 12]
nop
add sp, sp, 16
ret
.size foo, .-foo
.global bar
.type bar, %function
.ifdef __property_gcs__
.section ".note.gnu.property", "a"
.p2align 3
.long 1f - 0f /* name length */
.long 5f - 2f /* data length */
.long 5 /* note type */
0: .asciz "GNU" /* vendor name */
1:
.p2align 3
2: .long 0xc0000000 /* pr_type. */
.long 4f - 3f /* pr_datasz. */
3:
.long 0x4 /* GCS. */
4:
.p2align 3
5:
.endif

6
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#name: GNU Property (input without gcs output forced with gcs=implicit)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0
#ld: -z gcs=implicit
#readelf: -n

6
ld/testsuite/ld-aarch64/property-gcs21.d Normal file
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@ -0,0 +1,6 @@
#name: GNU Property (input with gcs output forced with gcs=never)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0 -defsym __property_gcs__=1
#ld: -z gcs=never
#readelf: -n

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ld/testsuite/ld-aarch64/property-gcs22.d Normal file
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@ -0,0 +1,11 @@
#name: GNU Property (input with gcs output forced with gcs=implicit)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0 -defsym __property_gcs__=1
#ld: -z gcs=implicit
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

11
ld/testsuite/ld-aarch64/property-gcs3.d Normal file
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@ -0,0 +1,11 @@
#name: GNU Property (input without gcs output forced with gcs)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0
#ld: -z gcs
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

11
ld/testsuite/ld-aarch64/property-gcs4.d Normal file
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@ -0,0 +1,11 @@
#name: GNU Property (input without gcs output forced with gcs=always)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0
#ld: -z gcs=always
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

11
ld/testsuite/ld-aarch64/property-gcs5.d Normal file
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@ -0,0 +1,11 @@
#name: GNU Property (input without gcs output forced with gcs gcs-report=none)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0
#ld: -z gcs -z gcs-report=none
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

12
ld/testsuite/ld-aarch64/property-gcs6.d Normal file
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@ -0,0 +1,12 @@
#name: GNU Property (input without gcs output forced with gcs gcs-report=warning)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0
#ld: -z gcs -z gcs-report=warning
#readelf: -n
#warning: .*property-gcs.*: warning: GCS turned on by -z gcs on the output when all inputs do not have GCS in NOTE section.
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

6
ld/testsuite/ld-aarch64/property-gcs7.d Normal file
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@ -0,0 +1,6 @@
#name: GNU Property (input without gcs output forced with gcs gcs-report=error)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0
#ld: -z gcs -z gcs-report=error
#error: .*property-gcs.*: error: GCS turned on by -z gcs on the output when all inputs do not have GCS in NOTE section.

11
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@ -0,0 +1,11 @@
#name: GNU Property (input without gcs output forced with gcs=always gcs-report=none)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0
#ld: -z gcs=always -z gcs-report=none
#readelf: -n
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS

12
ld/testsuite/ld-aarch64/property-gcs9.d Normal file
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@ -0,0 +1,12 @@
#name: GNU Property (input without gcs output forced with gcs=always gcs-report=warning)
#source: property-gcs.s
#alltargets: [check_shared_lib_support] *linux*
#as: -march=armv9.4-a+gcs -defsym __mult__=0
#ld: -z gcs=always -z gcs-report=warning
#readelf: -n
#warning: .*property-gcs.*: warning: GCS turned on by -z gcs on the output when all inputs do not have GCS in NOTE section.
Displaying notes found in: .note.gnu.property
[ ]+Owner[ ]+Data size[ ]+Description
GNU 0x00000010 NT_GNU_PROPERTY_TYPE_0
Properties: AArch64 feature: GCS