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Add AVX support to ld.so auditing for x86-64.

This commit is contained in:
H.J. Lu 2009-07-10 12:04:14 -07:00 committed by Ulrich Drepper
parent 786b74f41a
commit b0ecde3a63
19 changed files with 1016 additions and 124 deletions
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34
ChangeLog
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@ -1,3 +1,37 @@
2009-07-07 H.J. Lu <hongjiu.lu@intel.com>
* config.h.in: Add HAVE_AVX_SUPPORT entry.
* config.make.in: Add config-cflags-avx entry.
* configure.in: Substitute libc_cv_cc_avx.
* elf/Makefile: Add rules to build and run tst-audit4 and tst-audit5.
* elf/tst-audit4.c: New file.
* elf/tst-audit5.c: New file.
* elf/tst-auditmod4a.c: New file.
* elf/tst-auditmod4b.c: New file.
* elf/tst-auditmod5a.c: New file.
* elf/tst-auditmod5b.c: New file.
* sysdeps/x86_64/Makefile (gen-as-const-headers): Add
link-defines.sym.
* sysdeps/x86_64/bits/link.h (La_x86_64_ymm): New.
(La_x86_64_vector): Likewise.
(La_x86_64_regs): Append lr_vector.
(La_x86_64_retval): Append lr_vector0/lrv_vector1.
* sysdeps/x86_64/dl-trampoline.S (_dl_runtime_profile): Move
saving and restoring SSE registers to ...
* sysdeps/x86_64/dl-trampoline.h: This. New file.
* sysdeps/x86_64/dl-trampoline.S: Include <config.h> and
<link-defines.h>.
(_dl_runtime_profile): Use LR_SIZE to allocate space for
La_x86_64_regs. Allocate extra space and jump to memory at
save_and_restore_vector if HAVE_AVX_SUPPORT is defined.
(save_and_restore_vector_sse): New.
(save_and_restore_vector_avx): Likewise.
(check_avx): Likewise.
(save_and_restore_vector): Likewise.
* sysdeps/x86_64/elf/configure.in: Set libc_cv_cc_avx and
HAVE_AVX_SUPPORT.
* sysdeps/x86_64/link-defines.sym: New file.
2009-07-10 Ulrich Drepper <drepper@redhat.com> 2009-07-10 Ulrich Drepper <drepper@redhat.com>
* elf/do-lookup.h: Removed after folding content into... * elf/do-lookup.h: Removed after folding content into...

3
config.h.in
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@ -135,6 +135,9 @@
/* Define if gcc supports SSE4. */ /* Define if gcc supports SSE4. */
#undef HAVE_SSE4_SUPPORT #undef HAVE_SSE4_SUPPORT
/* Define if gcc supports AVX. */
#undef HAVE_AVX_SUPPORT
/* Define if the compiler's exception support is based on libunwind. */ /* Define if the compiler's exception support is based on libunwind. */
#undef HAVE_CC_WITH_LIBUNWIND #undef HAVE_CC_WITH_LIBUNWIND

1
config.make.in
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@ -35,6 +35,7 @@ cflags-cpu = @libc_cv_cc_submachine@
asflags-cpu = @libc_cv_cc_submachine@ asflags-cpu = @libc_cv_cc_submachine@
config-cflags-sse4 = @libc_cv_cc_sse4@ config-cflags-sse4 = @libc_cv_cc_sse4@
config-cflags-avx = @libc_cv_cc_avx@
defines = @DEFINES@ defines = @DEFINES@
sysincludes = @SYSINCLUDES@ sysincludes = @SYSINCLUDES@

2
configure vendored
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@ -657,6 +657,7 @@ xcoff
elf elf
ldd_rewrite_script ldd_rewrite_script
use_ldconfig use_ldconfig
libc_cv_cc_avx
libc_cv_cc_sse4 libc_cv_cc_sse4
libc_cv_cpp_asm_debuginfo libc_cv_cpp_asm_debuginfo
libc_cv_forced_unwind libc_cv_forced_unwind
@ -8772,6 +8773,7 @@ fi
if test $elf = yes; then if test $elf = yes; then
cat >>confdefs.h <<\_ACEOF cat >>confdefs.h <<\_ACEOF
#define HAVE_ELF 1 #define HAVE_ELF 1

1
configure.in
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@ -2277,6 +2277,7 @@ AC_SUBST(libc_cv_forced_unwind)
dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests dnl sysdeps/CPU/configure.in checks set this via arch-specific asm tests
AC_SUBST(libc_cv_cpp_asm_debuginfo) AC_SUBST(libc_cv_cpp_asm_debuginfo)
AC_SUBST(libc_cv_cc_sse4) AC_SUBST(libc_cv_cc_sse4)
AC_SUBST(libc_cv_cc_avx)
AC_SUBST(use_ldconfig) AC_SUBST(use_ldconfig)
AC_SUBST(ldd_rewrite_script) AC_SUBST(ldd_rewrite_script)

22
elf/Makefile
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@ -89,8 +89,10 @@ distribute := rtld-Rules \
unload4mod1.c unload4mod2.c unload4mod3.c unload4mod4.c \ unload4mod1.c unload4mod2.c unload4mod3.c unload4mod4.c \
unload6mod1.c unload6mod2.c unload6mod3.c \ unload6mod1.c unload6mod2.c unload6mod3.c \
unload7mod1.c unload7mod2.c \ unload7mod1.c unload7mod2.c \
tst-audit1.c tst-audit2.c tst-audit3.c \ tst-audit1.c tst-audit2.c tst-audit3.c tst-audit4.c \
tst-auditmod1.c tst-auditmod3a.c tst-auditmod3b.c \ tst-auditmod1.c tst-auditmod3a.c tst-auditmod3b.c \
tst-auditmod4a.c tst-auditmod4b.c \
tst-audit5.c tst-auditmod5a.c tst-auditmod5b.c \
order2mod1.c order2mod2.c order2mod3.c order2mod4.c \ order2mod1.c order2mod2.c order2mod3.c order2mod4.c \
tst-stackguard1.c tst-stackguard1-static.c \ tst-stackguard1.c tst-stackguard1-static.c \
tst-array5.c tst-array5-static.c tst-array5dep.c \ tst-array5.c tst-array5-static.c tst-array5dep.c \
@ -198,7 +200,7 @@ tests += loadtest restest1 preloadtest loadfail multiload origtest resolvfail \
test-srcs = tst-pathopt test-srcs = tst-pathopt
tests-execstack-yes = tst-execstack tst-execstack-needed tst-execstack-prog tests-execstack-yes = tst-execstack tst-execstack-needed tst-execstack-prog
ifeq (x86_64,$(config-machine)) ifeq (x86_64,$(config-machine))
tests += tst-audit3 tests += tst-audit3 tst-audit4 tst-audit5
endif endif
endif endif
ifeq (yesyes,$(have-fpie)$(build-shared)) ifeq (yesyes,$(have-fpie)$(build-shared))
@ -238,6 +240,8 @@ modules-names = testobj1 testobj2 testobj3 testobj4 testobj5 testobj6 \
tst-dlopenrpathmod tst-deep1mod1 tst-deep1mod2 tst-deep1mod3 \ tst-dlopenrpathmod tst-deep1mod1 tst-deep1mod2 tst-deep1mod3 \
tst-dlmopen1mod tst-auditmod1 \ tst-dlmopen1mod tst-auditmod1 \
tst-auditmod3a tst-auditmod3b \ tst-auditmod3a tst-auditmod3b \
tst-auditmod4a tst-auditmod4b \
tst-auditmod5a tst-auditmod5b \
unload3mod1 unload3mod2 unload3mod3 unload3mod4 \ unload3mod1 unload3mod2 unload3mod3 unload3mod4 \
unload4mod1 unload4mod2 unload4mod3 unload4mod4 \ unload4mod1 unload4mod2 unload4mod3 unload4mod4 \
unload6mod1 unload6mod2 unload6mod3 \ unload6mod1 unload6mod2 unload6mod3 \
@ -973,6 +977,14 @@ $(objpfx)tst-audit3: $(objpfx)tst-auditmod3a.so
$(objpfx)tst-audit3.out: $(objpfx)tst-auditmod3b.so $(objpfx)tst-audit3.out: $(objpfx)tst-auditmod3b.so
tst-audit3-ENV = LD_AUDIT=$(objpfx)tst-auditmod3b.so tst-audit3-ENV = LD_AUDIT=$(objpfx)tst-auditmod3b.so
$(objpfx)tst-audit4: $(objpfx)tst-auditmod4a.so
$(objpfx)tst-audit4.out: $(objpfx)tst-auditmod4b.so
tst-audit4-ENV = LD_AUDIT=$(objpfx)tst-auditmod4b.so
$(objpfx)tst-audit5: $(objpfx)tst-auditmod5a.so
$(objpfx)tst-audit5.out: $(objpfx)tst-auditmod5b.so
tst-audit5-ENV = LD_AUDIT=$(objpfx)tst-auditmod5b.so
$(objpfx)tst-global1: $(libdl) $(objpfx)tst-global1: $(libdl)
$(objpfx)tst-global1.out: $(objpfx)testobj6.so $(objpfx)testobj2.so $(objpfx)tst-global1.out: $(objpfx)testobj6.so $(objpfx)testobj2.so
@ -1115,3 +1127,9 @@ $(objpfx)tst-unique1.out: $(objpfx)tst-unique1mod1.so \
$(objpfx)tst-unique2: $(libdl) $(objpfx)tst-unique2mod1.so $(objpfx)tst-unique2: $(libdl) $(objpfx)tst-unique2mod1.so
$(objpfx)tst-unique2.out: $(objpfx)tst-unique2mod2.so $(objpfx)tst-unique2.out: $(objpfx)tst-unique2mod2.so
ifeq (yes,$(config-cflags-avx))
CFLAGS-tst-audit4.c += -mavx
CFLAGS-tst-auditmod4a.c += -mavx
CFLAGS-tst-auditmod4b.c += -mavx
endif

35
elf/tst-audit4.c Normal file
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@ -0,0 +1,35 @@
/* Test case for x86-64 preserved registers in dynamic linker. */
#ifdef __AVX__
#include <stdlib.h>
#include <string.h>
#include <cpuid.h>
#include <immintrin.h>
extern __m256i audit_test (__m256i, __m256i, __m256i, __m256i,
__m256i, __m256i, __m256i, __m256i);
int
main (void)
{
unsigned int eax, ebx, ecx, edx;
/* Run AVX test only if AVX is supported. */
if (__get_cpuid (1, &eax, &ebx, &ecx, &edx)
&& (ecx & bit_AVX))
{
__m256i ymm = _mm256_setzero_si256 ();
__m256i ret = audit_test (ymm, ymm, ymm, ymm, ymm, ymm, ymm, ymm);
ymm = _mm256_set1_epi32 (0x12349876);
if (memcmp (&ymm, &ret, sizeof (ret)))
abort ();
}
return 0;
}
#else
int
main (void)
{
return 0;
}
#endif

21
elf/tst-audit5.c Normal file
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@ -0,0 +1,21 @@
/* Test case for x86-64 preserved registers in dynamic linker. */
#include <stdlib.h>
#include <string.h>
#include <emmintrin.h>
extern __m128i audit_test (__m128i, __m128i, __m128i, __m128i,
__m128i, __m128i, __m128i, __m128i);
int
main (void)
{
__m128i xmm = _mm_setzero_si128 ();
__m128i ret = audit_test (xmm, xmm, xmm, xmm, xmm, xmm, xmm, xmm);
xmm = _mm_set1_epi32 (0x12349876);
if (memcmp (&xmm, &ret, sizeof (ret)))
abort ();
return 0;
}

48
elf/tst-auditmod4a.c Normal file
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@ -0,0 +1,48 @@
/* Test case for x86-64 preserved registers in dynamic linker. */
#ifdef __AVX__
#include <stdlib.h>
#include <string.h>
#include <immintrin.h>
__m256i
audit_test (__m256i x0, __m256i x1, __m256i x2, __m256i x3,
__m256i x4, __m256i x5, __m256i x6, __m256i x7)
{
__m256i ymm;
ymm = _mm256_set1_epi32 (1);
if (memcmp (&ymm, &x0, sizeof (ymm)))
abort ();
ymm = _mm256_set1_epi32 (2);
if (memcmp (&ymm, &x1, sizeof (ymm)))
abort ();
ymm = _mm256_set1_epi32 (3);
if (memcmp (&ymm, &x2, sizeof (ymm)))
abort ();
ymm = _mm256_set1_epi32 (4);
if (memcmp (&ymm, &x3, sizeof (ymm)))
abort ();
ymm = _mm256_set1_epi32 (5);
if (memcmp (&ymm, &x4, sizeof (ymm)))
abort ();
ymm = _mm256_set1_epi32 (6);
if (memcmp (&ymm, &x5, sizeof (ymm)))
abort ();
ymm = _mm256_set1_epi32 (7);
if (memcmp (&ymm, &x6, sizeof (ymm)))
abort ();
ymm = _mm256_set1_epi32 (8);
if (memcmp (&ymm, &x7, sizeof (ymm)))
abort ();
return _mm256_setzero_si256 ();
}
#endif

206
elf/tst-auditmod4b.c Normal file
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@ -0,0 +1,206 @@
/* Verify that changing AVX registers in audit library won't affect
function parameter passing/return. */
#include <dlfcn.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <bits/wordsize.h>
#include <gnu/lib-names.h>
unsigned int
la_version (unsigned int v)
{
setlinebuf (stdout);
printf ("version: %u\n", v);
char buf[20];
sprintf (buf, "%u", v);
return v;
}
void
la_activity (uintptr_t *cookie, unsigned int flag)
{
if (flag == LA_ACT_CONSISTENT)
printf ("activity: consistent\n");
else if (flag == LA_ACT_ADD)
printf ("activity: add\n");
else if (flag == LA_ACT_DELETE)
printf ("activity: delete\n");
else
printf ("activity: unknown activity %u\n", flag);
}
char *
la_objsearch (const char *name, uintptr_t *cookie, unsigned int flag)
{
char buf[100];
const char *flagstr;
if (flag == LA_SER_ORIG)
flagstr = "LA_SET_ORIG";
else if (flag == LA_SER_LIBPATH)
flagstr = "LA_SER_LIBPATH";
else if (flag == LA_SER_RUNPATH)
flagstr = "LA_SER_RUNPATH";
else if (flag == LA_SER_CONFIG)
flagstr = "LA_SER_CONFIG";
else if (flag == LA_SER_DEFAULT)
flagstr = "LA_SER_DEFAULT";
else if (flag == LA_SER_SECURE)
flagstr = "LA_SER_SECURE";
else
{
sprintf (buf, "unknown flag %d", flag);
flagstr = buf;
}
printf ("objsearch: %s, %s\n", name, flagstr);
return (char *) name;
}
unsigned int
la_objopen (struct link_map *l, Lmid_t lmid, uintptr_t *cookie)
{
printf ("objopen: %ld, %s\n", lmid, l->l_name);
return 3;
}
void
la_preinit (uintptr_t *cookie)
{
printf ("preinit\n");
}
unsigned int
la_objclose (uintptr_t *cookie)
{
printf ("objclose\n");
return 0;
}
uintptr_t
la_symbind64 (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook,
uintptr_t *defcook, unsigned int *flags, const char *symname)
{
printf ("symbind64: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
symname, (long int) sym->st_value, ndx, *flags);
return sym->st_value;
}
#define pltenter la_x86_64_gnu_pltenter
#define pltexit la_x86_64_gnu_pltexit
#define La_regs La_x86_64_regs
#define La_retval La_x86_64_retval
#define int_retval lrv_rax
#include <tst-audit.h>
#ifdef __AVX__
#include <immintrin.h>
#include <cpuid.h>
static int avx = -1;
static int
__attribute ((always_inline))
check_avx (void)
{
if (avx == -1)
{
unsigned int eax, ebx, ecx, edx;
if (__get_cpuid (1, &eax, &ebx, &ecx, &edx)
&& (ecx & bit_AVX))
avx = 1;
else
avx = 0;
}
return avx;
}
#else
#include <emmintrin.h>
#endif
ElfW(Addr)
pltenter (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
uintptr_t *defcook, La_regs *regs, unsigned int *flags,
const char *symname, long int *framesizep)
{
printf ("pltenter: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
symname, (long int) sym->st_value, ndx, *flags);
#ifdef __AVX__
if (check_avx () && strcmp (symname, "audit_test") == 0)
{
__m256i zero = _mm256_setzero_si256 ();
if (memcmp (&regs->lr_vector[0], &zero, sizeof (zero))
|| memcmp (&regs->lr_vector[1], &zero, sizeof (zero))
|| memcmp (&regs->lr_vector[2], &zero, sizeof (zero))
|| memcmp (&regs->lr_vector[3], &zero, sizeof (zero))
|| memcmp (&regs->lr_vector[4], &zero, sizeof (zero))
|| memcmp (&regs->lr_vector[5], &zero, sizeof (zero))
|| memcmp (&regs->lr_vector[6], &zero, sizeof (zero))
|| memcmp (&regs->lr_vector[7], &zero, sizeof (zero)))
abort ();
for (int i = 0; i < 8; i++)
regs->lr_vector[i].ymm[0]
= (La_x86_64_ymm) _mm256_set1_epi32 (i + 1);
__m256i ymm = _mm256_set1_epi32 (-1);
asm volatile ("vmovdqa %0, %%ymm0" : : "x" (ymm) : "xmm0" );
asm volatile ("vmovdqa %0, %%ymm1" : : "x" (ymm) : "xmm1" );
asm volatile ("vmovdqa %0, %%ymm2" : : "x" (ymm) : "xmm2" );
asm volatile ("vmovdqa %0, %%ymm3" : : "x" (ymm) : "xmm3" );
asm volatile ("vmovdqa %0, %%ymm4" : : "x" (ymm) : "xmm4" );
asm volatile ("vmovdqa %0, %%ymm5" : : "x" (ymm) : "xmm5" );
asm volatile ("vmovdqa %0, %%ymm6" : : "x" (ymm) : "xmm6" );
asm volatile ("vmovdqa %0, %%ymm7" : : "x" (ymm) : "xmm7" );
*framesizep = 1024;
}
#endif
return sym->st_value;
}
unsigned int
pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
uintptr_t *defcook, const La_regs *inregs, La_retval *outregs,
const char *symname)
{
printf ("pltexit: symname=%s, st_value=%#lx, ndx=%u, retval=%tu\n",
symname, (long int) sym->st_value, ndx, outregs->int_retval);
#ifdef __AVX__
if (check_avx () && strcmp (symname, "audit_test") == 0)
{
__m256i zero = _mm256_setzero_si256 ();
if (memcmp (&outregs->lrv_vector0, &zero, sizeof (zero)))
abort ();
for (int i = 0; i < 8; i++)
{
__m256i ymm = _mm256_set1_epi32 (i + 1);
if (memcmp (&inregs->lr_vector[i], &ymm, sizeof (ymm)) != 0)
abort ();
}
outregs->lrv_vector0.ymm[0]
= (La_x86_64_ymm) _mm256_set1_epi32 (0x12349876);
__m256i ymm = _mm256_set1_epi32 (-1);
asm volatile ("vmovdqa %0, %%ymm0" : : "x" (ymm) : "xmm0" );
asm volatile ("vmovdqa %0, %%ymm1" : : "x" (ymm) : "xmm1" );
}
#endif
return 0;
}

46
elf/tst-auditmod5a.c Normal file
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@ -0,0 +1,46 @@
/* Test case for x86-64 preserved registers in dynamic linker. */
#include <stdlib.h>
#include <string.h>
#include <emmintrin.h>
__m128i
audit_test (__m128i x0, __m128i x1, __m128i x2, __m128i x3,
__m128i x4, __m128i x5, __m128i x6, __m128i x7)
{
__m128i xmm;
xmm = _mm_set1_epi32 (1);
if (memcmp (&xmm, &x0, sizeof (xmm)))
abort ();
xmm = _mm_set1_epi32 (2);
if (memcmp (&xmm, &x1, sizeof (xmm)))
abort ();
xmm = _mm_set1_epi32 (3);
if (memcmp (&xmm, &x2, sizeof (xmm)))
abort ();
xmm = _mm_set1_epi32 (4);
if (memcmp (&xmm, &x3, sizeof (xmm)))
abort ();
xmm = _mm_set1_epi32 (5);
if (memcmp (&xmm, &x4, sizeof (xmm)))
abort ();
xmm = _mm_set1_epi32 (6);
if (memcmp (&xmm, &x5, sizeof (xmm)))
abort ();
xmm = _mm_set1_epi32 (7);
if (memcmp (&xmm, &x6, sizeof (xmm)))
abort ();
xmm = _mm_set1_epi32 (8);
if (memcmp (&xmm, &x7, sizeof (xmm)))
abort ();
return _mm_setzero_si128 ();
}

178
elf/tst-auditmod5b.c Normal file
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@ -0,0 +1,178 @@
/* Verify that changing xmm registers in audit library won't affect
function parameter passing/return. */
#include <dlfcn.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <bits/wordsize.h>
#include <gnu/lib-names.h>
#include <emmintrin.h>
unsigned int
la_version (unsigned int v)
{
setlinebuf (stdout);
printf ("version: %u\n", v);
char buf[20];
sprintf (buf, "%u", v);
return v;
}
void
la_activity (uintptr_t *cookie, unsigned int flag)
{
if (flag == LA_ACT_CONSISTENT)
printf ("activity: consistent\n");
else if (flag == LA_ACT_ADD)
printf ("activity: add\n");
else if (flag == LA_ACT_DELETE)
printf ("activity: delete\n");
else
printf ("activity: unknown activity %u\n", flag);
}
char *
la_objsearch (const char *name, uintptr_t *cookie, unsigned int flag)
{
char buf[100];
const char *flagstr;
if (flag == LA_SER_ORIG)
flagstr = "LA_SET_ORIG";
else if (flag == LA_SER_LIBPATH)
flagstr = "LA_SER_LIBPATH";
else if (flag == LA_SER_RUNPATH)
flagstr = "LA_SER_RUNPATH";
else if (flag == LA_SER_CONFIG)
flagstr = "LA_SER_CONFIG";
else if (flag == LA_SER_DEFAULT)
flagstr = "LA_SER_DEFAULT";
else if (flag == LA_SER_SECURE)
flagstr = "LA_SER_SECURE";
else
{
sprintf (buf, "unknown flag %d", flag);
flagstr = buf;
}
printf ("objsearch: %s, %s\n", name, flagstr);
return (char *) name;
}
unsigned int
la_objopen (struct link_map *l, Lmid_t lmid, uintptr_t *cookie)
{
printf ("objopen: %ld, %s\n", lmid, l->l_name);
return 3;
}
void
la_preinit (uintptr_t *cookie)
{
printf ("preinit\n");
}
unsigned int
la_objclose (uintptr_t *cookie)
{
printf ("objclose\n");
return 0;
}
uintptr_t
la_symbind64 (Elf64_Sym *sym, unsigned int ndx, uintptr_t *refcook,
uintptr_t *defcook, unsigned int *flags, const char *symname)
{
printf ("symbind64: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
symname, (long int) sym->st_value, ndx, *flags);
return sym->st_value;
}
#define pltenter la_x86_64_gnu_pltenter
#define pltexit la_x86_64_gnu_pltexit
#define La_regs La_x86_64_regs
#define La_retval La_x86_64_retval
#define int_retval lrv_rax
#include <tst-audit.h>
ElfW(Addr)
pltenter (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
uintptr_t *defcook, La_regs *regs, unsigned int *flags,
const char *symname, long int *framesizep)
{
printf ("pltenter: symname=%s, st_value=%#lx, ndx=%u, flags=%u\n",
symname, (long int) sym->st_value, ndx, *flags);
__m128i minusone = _mm_set1_epi32 (-1);
if (strcmp (symname, "audit_test") == 0)
{
__m128i zero = _mm_setzero_si128 ();
if (memcmp (&regs->lr_xmm[0], &zero, sizeof (zero))
|| memcmp (&regs->lr_xmm[1], &zero, sizeof (zero))
|| memcmp (&regs->lr_xmm[2], &zero, sizeof (zero))
|| memcmp (&regs->lr_xmm[3], &zero, sizeof (zero))
|| memcmp (&regs->lr_xmm[4], &zero, sizeof (zero))
|| memcmp (&regs->lr_xmm[5], &zero, sizeof (zero))
|| memcmp (&regs->lr_xmm[6], &zero, sizeof (zero))
|| memcmp (&regs->lr_xmm[7], &zero, sizeof (zero)))
abort ();
for (int i = 0; i < 8; i++)
regs->lr_xmm[i] = (La_x86_64_xmm) _mm_set1_epi32 (i + 1);
*framesizep = 1024;
}
asm volatile ("movdqa %0, %%xmm0" : : "x" (minusone) : "xmm0" );
asm volatile ("movdqa %0, %%xmm1" : : "x" (minusone) : "xmm1" );
asm volatile ("movdqa %0, %%xmm2" : : "x" (minusone) : "xmm2" );
asm volatile ("movdqa %0, %%xmm3" : : "x" (minusone) : "xmm3" );
asm volatile ("movdqa %0, %%xmm4" : : "x" (minusone) : "xmm4" );
asm volatile ("movdqa %0, %%xmm5" : : "x" (minusone) : "xmm5" );
asm volatile ("movdqa %0, %%xmm6" : : "x" (minusone) : "xmm6" );
asm volatile ("movdqa %0, %%xmm7" : : "x" (minusone) : "xmm7" );
return sym->st_value;
}
unsigned int
pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
uintptr_t *defcook, const La_regs *inregs, La_retval *outregs,
const char *symname)
{
printf ("pltexit: symname=%s, st_value=%#lx, ndx=%u, retval=%tu\n",
symname, (long int) sym->st_value, ndx, outregs->int_retval);
__m128i xmm;
if (strcmp (symname, "audit_test") == 0)
{
__m128i zero = _mm_setzero_si128 ();
if (memcmp (&outregs->lrv_xmm0, &zero, sizeof (zero)))
abort ();
for (int i = 0; i < 8; i++)
{
xmm = _mm_set1_epi32 (i + 1);
if (memcmp (&inregs->lr_xmm[i], &xmm, sizeof (xmm)) != 0)
abort ();
}
outregs->lrv_xmm0 = (La_x86_64_xmm) _mm_set1_epi32 (0x12349876);
}
xmm = _mm_set1_epi32 (-1);
asm volatile ("movdqa %0, %%xmm0" : : "x" (xmm) : "xmm0" );
asm volatile ("movdqa %0, %%xmm1" : : "x" (xmm) : "xmm1" );
return 0;
}

1
sysdeps/x86_64/Makefile
View File

@ -4,6 +4,7 @@ long-double-fcts = yes
ifeq ($(subdir),csu) ifeq ($(subdir),csu)
sysdep_routines += hp-timing sysdep_routines += hp-timing
elide-routines.os += hp-timing elide-routines.os += hp-timing
gen-as-const-headers += link-defines.sym
endif endif
ifeq ($(subdir),gmon) ifeq ($(subdir),gmon)

12
sysdeps/x86_64/bits/link.h
View File

@ -65,10 +65,19 @@ __END_DECLS
/* Registers for entry into PLT on x86-64. */ /* Registers for entry into PLT on x86-64. */
# if __GNUC_PREREQ (4,0) # if __GNUC_PREREQ (4,0)
typedef float La_x86_64_xmm __attribute__ ((__vector_size__ (16))); typedef float La_x86_64_xmm __attribute__ ((__vector_size__ (16)));
typedef float La_x86_64_ymm __attribute__ ((__vector_size__ (32)));
# else # else
typedef float La_x86_64_xmm __attribute__ ((__mode__ (__V4SF__))); typedef float La_x86_64_xmm __attribute__ ((__mode__ (__V4SF__)));
# endif # endif
typedef union
{
# if __GNUC_PREREQ (4,0)
La_x86_64_ymm ymm[2];
# endif
La_x86_64_xmm xmm[4];
} La_x86_64_vector __attribute__ ((aligned(16)));
typedef struct La_x86_64_regs typedef struct La_x86_64_regs
{ {
uint64_t lr_rdx; uint64_t lr_rdx;
@ -80,6 +89,7 @@ typedef struct La_x86_64_regs
uint64_t lr_rbp; uint64_t lr_rbp;
uint64_t lr_rsp; uint64_t lr_rsp;
La_x86_64_xmm lr_xmm[8]; La_x86_64_xmm lr_xmm[8];
La_x86_64_vector lr_vector[8];
} La_x86_64_regs; } La_x86_64_regs;
/* Return values for calls from PLT on x86-64. */ /* Return values for calls from PLT on x86-64. */
@ -91,6 +101,8 @@ typedef struct La_x86_64_retval
La_x86_64_xmm lrv_xmm1; La_x86_64_xmm lrv_xmm1;
long double lrv_st0; long double lrv_st0;
long double lrv_st1; long double lrv_st1;
La_x86_64_vector lrv_vector0;
La_x86_64_vector lrv_vector1;
} La_x86_64_retval; } La_x86_64_retval;

175
sysdeps/x86_64/dl-trampoline.S
View File

@ -17,7 +17,9 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */ 02111-1307 USA. */
#include <config.h>
#include <sysdep.h> #include <sysdep.h>
#include <link-defines.h>
.text .text
.globl _dl_runtime_resolve .globl _dl_runtime_resolve
@ -89,135 +91,64 @@ _dl_runtime_profile:
/* Actively align the La_x86_64_regs structure. */ /* Actively align the La_x86_64_regs structure. */
andq $0xfffffffffffffff0, %rsp andq $0xfffffffffffffff0, %rsp
subq $192, %rsp # sizeof(La_x86_64_regs) # ifdef HAVE_AVX_SUPPORT
/* sizeof(La_x86_64_regs). Need extra space for 8 SSE registers
to detect if any xmm0-xmm7 registers are changed by audit
module. */
subq $(LR_SIZE + XMM_SIZE*8), %rsp
#else
subq $LR_SIZE, %rsp # sizeof(La_x86_64_regs)
#endif
movq %rsp, 24(%rbx) movq %rsp, 24(%rbx)
movq %rdx, (%rsp) # Fill the La_x86_64_regs structure. /* Fill the La_x86_64_regs structure. */
movq %r8, 8(%rsp) movq %rdx, LR_RDX_OFFSET(%rsp)
movq %r9, 16(%rsp) movq %r8, LR_R8_OFFSET(%rsp)
movq %rcx, 24(%rsp) movq %r9, LR_R9_OFFSET(%rsp)
movq %rsi, 32(%rsp) movq %rcx, LR_RCX_OFFSET(%rsp)
movq %rdi, 40(%rsp) movq %rsi, LR_RSI_OFFSET(%rsp)
movq %rbp, 48(%rsp) movq %rdi, LR_RDI_OFFSET(%rsp)
leaq 48(%rbx), %rax movq %rbp, LR_RBP_OFFSET(%rsp)
movq %rax, 56(%rsp)
movaps %xmm0, 64(%rsp)
movaps %xmm1, 80(%rsp)
movaps %xmm2, 96(%rsp)
movaps %xmm3, 112(%rsp)
movaps %xmm4, 128(%rsp)
movaps %xmm5, 144(%rsp)
movaps %xmm6, 160(%rsp)
movaps %xmm7, 176(%rsp)
movq %rsp, %rcx # La_x86_64_regs pointer to %rcx. # ifdef HAVE_AVX_SUPPORT
movq 48(%rbx), %rdx # Load return address if needed. jmp *L(save_and_restore_vector)(%rip)
movq 40(%rbx), %rsi # Copy args pushed by PLT in register.
movq 32(%rbx), %rdi # %rdi: link_map, %rsi: reloc_index
leaq 16(%rbx), %r8
call _dl_profile_fixup # Call resolver.
movq %rax, %r11 # Save return value. .align 16
L(save_and_restore_vector_sse):
# endif
movq 8(%rbx), %rax # Get back register content. # define MOVXMM movaps
movq (%rsp), %rdx # include "dl-trampoline.h"
movq 8(%rsp), %r8
movq 16(%rsp), %r9
movaps 64(%rsp), %xmm0
movaps 80(%rsp), %xmm1
movaps 96(%rsp), %xmm2
movaps 112(%rsp), %xmm3
movaps 128(%rsp), %xmm4
movaps 144(%rsp), %xmm5
movaps 160(%rsp), %xmm6
movaps 176(%rsp), %xmm7
movq 16(%rbx), %r10 # Anything in framesize? # ifdef HAVE_AVX_SUPPORT
testq %r10, %r10 # undef MOVXMM
jns 1f # define MOVXMM vmovdqa
# define RESTORE_AVX
/* There's nothing in the frame size, so there .align 16
will be no call to the _dl_call_pltexit. */ L(save_and_restore_vector_avx):
# include "dl-trampoline.h"
movq 24(%rsp), %rcx # Get back registers content. # endif
movq 32(%rsp), %rsi
movq 40(%rsp), %rdi
movq %rbx, %rsp
movq (%rsp), %rbx
cfi_restore(rbx)
cfi_def_cfa_register(%rsp)
addq $48, %rsp # Adjust the stack to the return value
# (eats the reloc index and link_map)
cfi_adjust_cfa_offset(-48)
jmp *%r11 # Jump to function address.
1:
cfi_adjust_cfa_offset(48)
cfi_rel_offset(%rbx, 0)
cfi_def_cfa_register(%rbx)
/* At this point we need to prepare new stack for the function
which has to be called. We copy the original stack to a
temporary buffer of the size specified by the 'framesize'
returned from _dl_profile_fixup */
leaq 56(%rbx), %rsi # stack
addq $8, %r10
andq $0xfffffffffffffff0, %r10
movq %r10, %rcx
subq %r10, %rsp
movq %rsp, %rdi
shrq $3, %rcx
rep
movsq
movq 24(%rdi), %rcx # Get back register content.
movq 32(%rdi), %rsi
movq 40(%rdi), %rdi
call *%r11
mov 24(%rbx), %rsp # Drop the copied stack content
/* Now we have to prepare the La_x86_64_retval structure for the
_dl_call_pltexit. The La_x86_64_regs is being pointed by rsp now,
so we just need to allocate the sizeof(La_x86_64_retval) space on
the stack, since the alignment has already been taken care of. */
subq $80, %rsp # sizeof(La_x86_64_retval)
movq %rsp, %rcx # La_x86_64_retval argument to %rcx.
movq %rax, (%rcx) # Fill in the La_x86_64_retval structure.
movq %rdx, 8(%rcx)
movaps %xmm0, 16(%rcx)
movaps %xmm1, 32(%rcx)
fstpt 48(%rcx)
fstpt 64(%rcx)
movq 24(%rbx), %rdx # La_x86_64_regs argument to %rdx.
movq 40(%rbx), %rsi # Copy args pushed by PLT in register.
movq 32(%rbx), %rdi # %rdi: link_map, %rsi: reloc_index
call _dl_call_pltexit
movq (%rsp), %rax # Restore return registers.
movq 8(%rsp), %rdx
movaps 16(%rsp), %xmm0
movaps 32(%rsp), %xmm1
fldt 64(%rsp)
fldt 48(%rsp)
movq %rbx, %rsp
movq (%rsp), %rbx
cfi_restore(rbx)
cfi_def_cfa_register(%rsp)
addq $48, %rsp # Adjust the stack to the return value
# (eats the reloc index and link_map)
cfi_adjust_cfa_offset(-48)
retq
cfi_endproc cfi_endproc
.size _dl_runtime_profile, .-_dl_runtime_profile .size _dl_runtime_profile, .-_dl_runtime_profile
# ifdef HAVE_AVX_SUPPORT
L(check_avx):
mov %rbx,%r11 # Save rbx
movl $1, %eax
cpuid
mov %r11,%rbx # Restore rbx
leaq L(save_and_restore_vector_sse)(%rip), %rax
andl $(1 << 28), %ecx # Check if AVX is available.
jz L(ret)
leaq L(save_and_restore_vector_avx)(%rip), %rax
L(ret):
movq %rax,L(save_and_restore_vector)(%rip)
jmp *%rax
.section .data.rel.local,"aw",@progbits
.align 8
L(save_and_restore_vector):
.quad L(check_avx)
# endif
#endif #endif

291
sysdeps/x86_64/dl-trampoline.h Normal file
View File

@ -0,0 +1,291 @@
/* Partial PLT profile trampoline to save and restore x86-64 vector
registers.
Copyright (C) 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
leaq 48(%rbx), %rax
movq %rax, LR_RSP_OFFSET(%rsp)
/* This is to provide backward binary compatility for existing
audit modules. */
MOVXMM %xmm0, (LR_XMM_OFFSET)(%rsp)
MOVXMM %xmm1, (LR_XMM_OFFSET + XMM_SIZE)(%rsp)
MOVXMM %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp)
MOVXMM %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp)
MOVXMM %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp)
MOVXMM %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp)
MOVXMM %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp)
MOVXMM %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp)
#ifdef RESTORE_AVX
/* This is to support AVX audit modules. */
vmovdqu %ymm0, (LR_VECTOR_OFFSET)(%rsp)
vmovdqu %ymm1, (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp)
vmovdqu %ymm2, (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp)
vmovdqu %ymm3, (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp)
vmovdqu %ymm4, (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp)
vmovdqu %ymm5, (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp)
vmovdqu %ymm6, (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp)
vmovdqu %ymm7, (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp)
/* Save xmm0-xmm7 registers to detect if any of them are
changed by audit module. */
vmovdqa %xmm0, (LR_SIZE)(%rsp)
vmovdqa %xmm1, (LR_SIZE + XMM_SIZE)(%rsp)
vmovdqa %xmm2, (LR_SIZE + XMM_SIZE*2)(%rsp)
vmovdqa %xmm3, (LR_SIZE + XMM_SIZE*3)(%rsp)
vmovdqa %xmm4, (LR_SIZE + XMM_SIZE*4)(%rsp)
vmovdqa %xmm5, (LR_SIZE + XMM_SIZE*5)(%rsp)
vmovdqa %xmm6, (LR_SIZE + XMM_SIZE*6)(%rsp)
vmovdqa %xmm7, (LR_SIZE + XMM_SIZE*7)(%rsp)
#endif
movq %rsp, %rcx # La_x86_64_regs pointer to %rcx.
movq 48(%rbx), %rdx # Load return address if needed.
movq 40(%rbx), %rsi # Copy args pushed by PLT in register.
movq 32(%rbx), %rdi # %rdi: link_map, %rsi: reloc_index
leaq 16(%rbx), %r8
call _dl_profile_fixup # Call resolver.
movq %rax, %r11 # Save return value.
movq 8(%rbx), %rax # Get back register content.
movq LR_RDX_OFFSET(%rsp), %rdx
movq LR_R8_OFFSET(%rsp), %r8
movq LR_R9_OFFSET(%rsp), %r9
#ifdef RESTORE_AVX
/* Check if any xmm0-xmm7 registers are changed by audit
module. */
vmovdqa (LR_XMM_OFFSET)(%rsp), %xmm0
vpcmpeqq (LR_SIZE)(%rsp), %xmm0, %xmm1
vpmovmskb %xmm1, %esi
cmpl $0xffff, %esi
jne 1f
vmovdqa (LR_XMM_OFFSET + XMM_SIZE)(%rsp), %xmm0
vpcmpeqq (LR_SIZE + XMM_SIZE)(%rsp), %xmm0, %xmm1
vpmovmskb %xmm1, %esi
cmpl $0xffff, %esi
jne 1f
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp), %xmm0
vpcmpeqq (LR_SIZE + XMM_SIZE*2)(%rsp), %xmm0, %xmm1
vpmovmskb %xmm1, %esi
cmpl $0xffff, %esi
jne 1f
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp), %xmm0
vpcmpeqq (LR_SIZE + XMM_SIZE*3)(%rsp), %xmm0, %xmm1
vpmovmskb %xmm1, %esi
cmpl $0xffff, %esi
jne 1f
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp), %xmm0
vpcmpeqq (LR_SIZE + XMM_SIZE*4)(%rsp), %xmm0, %xmm1
vpmovmskb %xmm1, %esi
cmpl $0xffff, %esi
jne 1f
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp), %xmm0
vpcmpeqq (LR_SIZE + XMM_SIZE*5)(%rsp), %xmm0, %xmm1
vpmovmskb %xmm1, %esi
cmpl $0xffff, %esi
jne 1f
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp), %xmm0
vpcmpeqq (LR_SIZE + XMM_SIZE*6)(%rsp), %xmm0, %xmm1
vpmovmskb %xmm1, %esi
cmpl $0xffff, %esi
jne 1f
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp), %xmm0
vpcmpeqq (LR_SIZE + XMM_SIZE*7)(%rsp), %xmm0, %xmm1
vpmovmskb %xmm1, %esi
cmpl $0xffff, %esi
jne 1f
/* We restore AVX registers only if xmm0-xmm7 registers are
unchanged. */
vmovdqu (LR_VECTOR_OFFSET)(%rsp), %ymm0
vmovdqu (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp), %ymm1
vmovdqu (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp), %ymm2
vmovdqu (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp), %ymm3
vmovdqu (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp), %ymm4
vmovdqu (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp), %ymm5
vmovdqu (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp), %ymm6
vmovdqu (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp), %ymm7
jmp 2f
1:
vmovdqa (LR_XMM_OFFSET)(%rsp), %xmm0
vmovdqa (LR_XMM_OFFSET + XMM_SIZE)(%rsp), %xmm1
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp), %xmm2
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp), %xmm3
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp), %xmm4
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp), %xmm5
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp), %xmm6
vmovdqa (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp), %xmm7
2:
#else
movaps (LR_XMM_OFFSET)(%rsp), %xmm0
movaps (LR_XMM_OFFSET + XMM_SIZE)(%rsp), %xmm1
movaps (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp), %xmm2
movaps (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp), %xmm3
movaps (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp), %xmm4
movaps (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp), %xmm5
movaps (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp), %xmm6
movaps (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp), %xmm7
#endif
movq 16(%rbx), %r10 # Anything in framesize?
testq %r10, %r10
jns 3f
/* There's nothing in the frame size, so there
will be no call to the _dl_call_pltexit. */
/* Get back registers content. */
movq LR_RCX_OFFSET(%rsp), %rcx
movq LR_RSI_OFFSET(%rsp), %rsi
movq LR_RDI_OFFSET(%rsp), %rdi
movq %rbx, %rsp
movq (%rsp), %rbx
cfi_restore(rbx)
cfi_def_cfa_register(%rsp)
addq $48, %rsp # Adjust the stack to the return value
# (eats the reloc index and link_map)
cfi_adjust_cfa_offset(-48)
jmp *%r11 # Jump to function address.
3:
cfi_adjust_cfa_offset(48)
cfi_rel_offset(%rbx, 0)
cfi_def_cfa_register(%rbx)
/* At this point we need to prepare new stack for the function
which has to be called. We copy the original stack to a
temporary buffer of the size specified by the 'framesize'
returned from _dl_profile_fixup */
leaq LR_RSP_OFFSET(%rbx), %rsi # stack
addq $8, %r10
andq $0xfffffffffffffff0, %r10
movq %r10, %rcx
subq %r10, %rsp
movq %rsp, %rdi
shrq $3, %rcx
rep
movsq
movq 24(%rdi), %rcx # Get back register content.
movq 32(%rdi), %rsi
movq 40(%rdi), %rdi
call *%r11
mov 24(%rbx), %rsp # Drop the copied stack content
/* Now we have to prepare the La_x86_64_retval structure for the
_dl_call_pltexit. The La_x86_64_regs is being pointed by rsp now,
so we just need to allocate the sizeof(La_x86_64_retval) space on
the stack, since the alignment has already been taken care of. */
#ifdef RESTORE_AVX
/* sizeof(La_x86_64_retval). Need extra space for 2 SSE
registers to detect if xmm0/xmm1 registers are changed
by audit module. */
subq $(LRV_SIZE + XMM_SIZE*2), %rsp
#else
subq $LRV_SIZE, %rsp # sizeof(La_x86_64_retval)
#endif
movq %rsp, %rcx # La_x86_64_retval argument to %rcx.
/* Fill in the La_x86_64_retval structure. */
movq %rax, LRV_RAX_OFFSET(%rcx)
movq %rdx, LRV_RDX_OFFSET(%rcx)
MOVXMM %xmm0, LRV_XMM0_OFFSET(%rcx)
MOVXMM %xmm1, LRV_XMM1_OFFSET(%rcx)
#ifdef RESTORE_AVX
/* This is to support AVX audit modules. */
vmovdqu %ymm0, LRV_VECTOR0_OFFSET(%rcx)
vmovdqu %ymm1, LRV_VECTOR1_OFFSET(%rcx)
/* Save xmm0/xmm1 registers to detect if they are changed
by audit module. */
vmovdqa %xmm0, (LRV_SIZE)(%rcx)
vmovdqa %xmm1, (LRV_SIZE + XMM_SIZE)(%rcx)
#endif
fstpt LRV_ST0_OFFSET(%rcx)
fstpt LRV_ST1_OFFSET(%rcx)
movq 24(%rbx), %rdx # La_x86_64_regs argument to %rdx.
movq 40(%rbx), %rsi # Copy args pushed by PLT in register.
movq 32(%rbx), %rdi # %rdi: link_map, %rsi: reloc_index
call _dl_call_pltexit
/* Restore return registers. */
movq LRV_RAX_OFFSET(%rsp), %rax
movq LRV_RDX_OFFSET(%rsp), %rdx
#ifdef RESTORE_AVX
/* Check if xmm0/xmm1 registers are changed by audit module. */
vmovdqa LRV_XMM0_OFFSET(%rsp), %xmm0
vpcmpeqq (LRV_SIZE)(%rsp), %xmm0, %xmm1
vpmovmskb %xmm1, %esi
cmpl $0xffff, %esi
jne 4f
/* We restore AVX registers only if xmm0/xmm1 registers are
unchanged. */
vmovdqa LRV_XMM1_OFFSET(%rsp), %xmm0
vpcmpeqq (LRV_SIZE + XMM_SIZE)(%rsp), %xmm0, %xmm1
vpmovmskb %xmm1, %esi
cmpl $0xffff, %esi
jne 4f
vmovdqu LRV_VECTOR0_OFFSET(%rsp), %ymm0
vmovdqu LRV_VECTOR1_OFFSET(%rsp), %ymm1
jmp 5f
4:
vmovdqa LRV_XMM0_OFFSET(%rsp), %xmm0
vmovdqa LRV_XMM1_OFFSET(%rsp), %xmm1
5:
#else
movaps LRV_XMM0_OFFSET(%rsp), %xmm0
movaps LRV_XMM1_OFFSET(%rsp), %xmm1
#endif
fldt LRV_ST0_OFFSET(%rsp)
fldt LRV_ST0_OFFSET(%rsp)
movq %rbx, %rsp
movq (%rsp), %rbx
cfi_restore(rbx)
cfi_def_cfa_register(%rsp)
addq $48, %rsp # Adjust the stack to the return value
# (eats the reloc index and link_map)
cfi_adjust_cfa_offset(-48)
retq

25
sysdeps/x86_64/elf/configure vendored
View File

@ -79,3 +79,28 @@ cat >>confdefs.h <<\_ACEOF
#define PI_STATIC_AND_HIDDEN 1 #define PI_STATIC_AND_HIDDEN 1
_ACEOF _ACEOF
{ $as_echo "$as_me:$LINENO: checking for AVX support" >&5
$as_echo_n "checking for AVX support... " >&6; }
if test "${libc_cv_cc_avx+set}" = set; then
$as_echo_n "(cached) " >&6
else
if { ac_try='${CC-cc} -mavx -xc /dev/null -S -o /dev/null'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
libc_cv_cc_avx=yes
else
libc_cv_cc_avx=no
fi
fi
{ $as_echo "$as_me:$LINENO: result: $libc_cv_cc_avx" >&5
$as_echo "$libc_cv_cc_avx" >&6; }
if test $libc_cv_cc_avx = yes; then
cat >>confdefs.h <<\_ACEOF
#define HAVE_AVX_SUPPORT 1
_ACEOF
fi

11
sysdeps/x86_64/elf/configure.in
View File

@ -32,3 +32,14 @@ fi
dnl It is always possible to access static and hidden symbols in an dnl It is always possible to access static and hidden symbols in an
dnl position independent way. dnl position independent way.
AC_DEFINE(PI_STATIC_AND_HIDDEN) AC_DEFINE(PI_STATIC_AND_HIDDEN)
dnl Check if -mavx works.
AC_CACHE_CHECK(for AVX support, libc_cv_cc_avx, [dnl
if AC_TRY_COMMAND([${CC-cc} -mavx -xc /dev/null -S -o /dev/null]); then
libc_cv_cc_avx=yes
else
libc_cv_cc_avx=no
fi])
if test $libc_cv_cc_avx = yes; then
AC_DEFINE(HAVE_AVX_SUPPORT)
fi

28
sysdeps/x86_64/link-defines.sym Normal file
View File

@ -0,0 +1,28 @@
#include "link.h"
#include <stddef.h>
--
VECTOR_SIZE sizeof (La_x86_64_vector)
XMM_SIZE sizeof (La_x86_64_xmm)
LR_SIZE sizeof (struct La_x86_64_regs)
LR_RDX_OFFSET offsetof (struct La_x86_64_regs, lr_rdx)
LR_R8_OFFSET offsetof (struct La_x86_64_regs, lr_r8)
LR_R9_OFFSET offsetof (struct La_x86_64_regs, lr_r9)
LR_RCX_OFFSET offsetof (struct La_x86_64_regs, lr_rcx)
LR_RSI_OFFSET offsetof (struct La_x86_64_regs, lr_rsi)
LR_RDI_OFFSET offsetof (struct La_x86_64_regs, lr_rdi)
LR_RBP_OFFSET offsetof (struct La_x86_64_regs, lr_rbp)
LR_RSP_OFFSET offsetof (struct La_x86_64_regs, lr_rsp)
LR_XMM_OFFSET offsetof (struct La_x86_64_regs, lr_xmm)
LR_VECTOR_OFFSET offsetof (struct La_x86_64_regs, lr_vector)
LRV_SIZE sizeof (struct La_x86_64_retval)
LRV_RAX_OFFSET offsetof (struct La_x86_64_retval, lrv_rax)
LRV_RDX_OFFSET offsetof (struct La_x86_64_retval, lrv_rdx)
LRV_XMM0_OFFSET offsetof (struct La_x86_64_retval, lrv_xmm0)
LRV_XMM1_OFFSET offsetof (struct La_x86_64_retval, lrv_xmm1)
LRV_ST0_OFFSET offsetof (struct La_x86_64_retval, lrv_st0)
LRV_ST1_OFFSET offsetof (struct La_x86_64_retval, lrv_st1)
LRV_VECTOR0_OFFSET offsetof (struct La_x86_64_retval, lrv_vector0)
LRV_VECTOR1_OFFSET offsetof (struct La_x86_64_retval, lrv_vector1)