qiurui
/
glibc
mirror of git://sourceware.org/git/glibc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
glibc/sysdeps/x86/tst-gnu2-tls2.c

27 lines
760 B
C
Raw Normal View History

x86: Update tst-gnu2-tls2 tests Update tst-gnu2-tls2 tests to set XMM0...XMM7 to all 1s in malloc to verify that XMM registers are preserved when _dl_tlsdesc_dynamic is called by clearing vectors with zeroed XMM registers before _dl_tlsdesc_dynamic and using these XMM registers to clear vectors after _dl_tlsdesc_dynamic. This improves the BZ #31372 test. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Sam James <sam@gentoo.org>
2025-06-09 00:17:49 +00:00
#ifndef TEST_AMX
# ifndef __x86_64__
# include <sys/platform/x86.h>
x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registers Compiler generates the following instruction sequence for GNU2 dynamic TLS access: leaq tls_var@TLSDESC(%rip), %rax call *tls_var@TLSCALL(%rax) or leal tls_var@TLSDESC(%ebx), %eax call *tls_var@TLSCALL(%eax) CALL instruction is transparent to compiler which assumes all registers, except for EFLAGS and RAX/EAX, are unchanged after CALL. When _dl_tlsdesc_dynamic is called, it calls __tls_get_addr on the slow path. __tls_get_addr is a normal function which doesn't preserve any caller-saved registers. _dl_tlsdesc_dynamic saved and restored integer caller-saved registers, but didn't preserve any other caller-saved registers. Add _dl_tlsdesc_dynamic IFUNC functions for FNSAVE, FXSAVE, XSAVE and XSAVEC to save and restore all caller-saved registers. This fixes BZ #31372. Add GLRO(dl_x86_64_runtime_resolve) with GLRO(dl_x86_tlsdesc_dynamic) to optimize elf_machine_runtime_setup. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
2024-02-26 14:37:03 +00:00
x86: Update tst-gnu2-tls2 tests Update tst-gnu2-tls2 tests to set XMM0...XMM7 to all 1s in malloc to verify that XMM registers are preserved when _dl_tlsdesc_dynamic is called by clearing vectors with zeroed XMM registers before _dl_tlsdesc_dynamic and using these XMM registers to clear vectors after _dl_tlsdesc_dynamic. This improves the BZ #31372 test. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Sam James <sam@gentoo.org>
2025-06-09 00:17:49 +00:00
# define IS_SUPPORTED() CPU_FEATURE_ACTIVE (SSE2)
# endif
x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registers Compiler generates the following instruction sequence for GNU2 dynamic TLS access: leaq tls_var@TLSDESC(%rip), %rax call *tls_var@TLSCALL(%rax) or leal tls_var@TLSDESC(%ebx), %eax call *tls_var@TLSCALL(%eax) CALL instruction is transparent to compiler which assumes all registers, except for EFLAGS and RAX/EAX, are unchanged after CALL. When _dl_tlsdesc_dynamic is called, it calls __tls_get_addr on the slow path. __tls_get_addr is a normal function which doesn't preserve any caller-saved registers. _dl_tlsdesc_dynamic saved and restored integer caller-saved registers, but didn't preserve any other caller-saved registers. Add _dl_tlsdesc_dynamic IFUNC functions for FNSAVE, FXSAVE, XSAVE and XSAVEC to save and restore all caller-saved registers. This fixes BZ #31372. Add GLRO(dl_x86_64_runtime_resolve) with GLRO(dl_x86_tlsdesc_dynamic) to optimize elf_machine_runtime_setup. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
2024-02-26 14:37:03 +00:00
x86: Update tst-gnu2-tls2 tests Update tst-gnu2-tls2 tests to set XMM0...XMM7 to all 1s in malloc to verify that XMM registers are preserved when _dl_tlsdesc_dynamic is called by clearing vectors with zeroed XMM registers before _dl_tlsdesc_dynamic and using these XMM registers to clear vectors after _dl_tlsdesc_dynamic. This improves the BZ #31372 test. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Sam James <sam@gentoo.org>
2025-06-09 00:17:49 +00:00
/* Set XMM0...XMM7 to all 1s. */
# define PREPARE_MALLOC() \
{ \
asm volatile ("pcmpeqd %%xmm0, %%xmm0" : : : "xmm0" ); \
asm volatile ("pcmpeqd %%xmm1, %%xmm1" : : : "xmm1" ); \
asm volatile ("pcmpeqd %%xmm2, %%xmm2" : : : "xmm2" ); \
asm volatile ("pcmpeqd %%xmm3, %%xmm3" : : : "xmm3" ); \
asm volatile ("pcmpeqd %%xmm4, %%xmm4" : : : "xmm4" ); \
asm volatile ("pcmpeqd %%xmm5, %%xmm5" : : : "xmm5" ); \
asm volatile ("pcmpeqd %%xmm6, %%xmm6" : : : "xmm6" ); \
asm volatile ("pcmpeqd %%xmm7, %%xmm7" : : : "xmm7" ); \
x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registers Compiler generates the following instruction sequence for GNU2 dynamic TLS access: leaq tls_var@TLSDESC(%rip), %rax call *tls_var@TLSCALL(%rax) or leal tls_var@TLSDESC(%ebx), %eax call *tls_var@TLSCALL(%eax) CALL instruction is transparent to compiler which assumes all registers, except for EFLAGS and RAX/EAX, are unchanged after CALL. When _dl_tlsdesc_dynamic is called, it calls __tls_get_addr on the slow path. __tls_get_addr is a normal function which doesn't preserve any caller-saved registers. _dl_tlsdesc_dynamic saved and restored integer caller-saved registers, but didn't preserve any other caller-saved registers. Add _dl_tlsdesc_dynamic IFUNC functions for FNSAVE, FXSAVE, XSAVE and XSAVEC to save and restore all caller-saved registers. This fixes BZ #31372. Add GLRO(dl_x86_64_runtime_resolve) with GLRO(dl_x86_tlsdesc_dynamic) to optimize elf_machine_runtime_setup. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
2024-02-26 14:37:03 +00:00
}
x86: Update tst-gnu2-tls2 tests Update tst-gnu2-tls2 tests to set XMM0...XMM7 to all 1s in malloc to verify that XMM registers are preserved when _dl_tlsdesc_dynamic is called by clearing vectors with zeroed XMM registers before _dl_tlsdesc_dynamic and using these XMM registers to clear vectors after _dl_tlsdesc_dynamic. This improves the BZ #31372 test. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Sam James <sam@gentoo.org>
2025-06-09 00:17:49 +00:00
#endif
x86: Update _dl_tlsdesc_dynamic to preserve caller-saved registers Compiler generates the following instruction sequence for GNU2 dynamic TLS access: leaq tls_var@TLSDESC(%rip), %rax call *tls_var@TLSCALL(%rax) or leal tls_var@TLSDESC(%ebx), %eax call *tls_var@TLSCALL(%eax) CALL instruction is transparent to compiler which assumes all registers, except for EFLAGS and RAX/EAX, are unchanged after CALL. When _dl_tlsdesc_dynamic is called, it calls __tls_get_addr on the slow path. __tls_get_addr is a normal function which doesn't preserve any caller-saved registers. _dl_tlsdesc_dynamic saved and restored integer caller-saved registers, but didn't preserve any other caller-saved registers. Add _dl_tlsdesc_dynamic IFUNC functions for FNSAVE, FXSAVE, XSAVE and XSAVEC to save and restore all caller-saved registers. This fixes BZ #31372. Add GLRO(dl_x86_64_runtime_resolve) with GLRO(dl_x86_tlsdesc_dynamic) to optimize elf_machine_runtime_setup. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
2024-02-26 14:37:03 +00:00
#include <elf/tst-gnu2-tls2.c>
x86: Update tst-gnu2-tls2 tests Update tst-gnu2-tls2 tests to set XMM0...XMM7 to all 1s in malloc to verify that XMM registers are preserved when _dl_tlsdesc_dynamic is called by clearing vectors with zeroed XMM registers before _dl_tlsdesc_dynamic and using these XMM registers to clear vectors after _dl_tlsdesc_dynamic. This improves the BZ #31372 test. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Sam James <sam@gentoo.org>
2025-06-09 00:17:49 +00:00
#ifndef TEST_AMX
v2di v1, v2, v3;
#endif