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GNU C Library master sources branch master updated. glibc-2.22-128-gf3dcae8
- From: hjl at sourceware dot org
- To: glibc-cvs at sourceware dot org
- Date: 25 Aug 2015 11:52:27 -0000
- Subject: GNU C Library master sources branch master updated. glibc-2.22-128-gf3dcae8
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http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=f3dcae82d54e5097e18e1d6ef4ff55c2ea4e621e
commit f3dcae82d54e5097e18e1d6ef4ff55c2ea4e621e
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Tue Aug 25 04:33:54 2015 -0700
Save and restore vector registers in x86-64 ld.so
This patch adds SSE, AVX and AVX512 versions of _dl_runtime_resolve
and _dl_runtime_profile, which save and restore the first 8 vector
registers used for parameter passing. elf_machine_runtime_setup
selects the proper _dl_runtime_resolve or _dl_runtime_profile based
on _dl_x86_cpu_features. It avoids race condition caused by
FOREIGN_CALL macros, which are only used for x86-64.
Performance impact of saving and restoring 8 vector registers are
negligible on Nehalem, Sandy Bridge, Ivy Bridge and Haswell when
ld.so is optimized with SSE2.
[BZ #15128]
* sysdeps/x86_64/Makefile [$(subdir) == elf] (tests): Add
ifuncmain8.
(modules-names): Add ifuncmod8.
($(objpfx)ifuncmain8): New rule.
* sysdeps/x86_64/dl-machine.h: Include <dl-procinfo.h> and
<cpuid.h>.
(elf_machine_runtime_setup): Use _dl_runtime_resolve_sse,
_dl_runtime_resolve_avx, or _dl_runtime_resolve_avx512,
_dl_runtime_profile_sse, _dl_runtime_profile_avx, or
_dl_runtime_profile_avx512, based on HAS_ARCH_FEATURE.
* sysdeps/x86_64/dl-trampoline.S: Rewrite.
* sysdeps/x86_64/dl-trampoline.h: Likewise.
* sysdeps/x86_64/ifuncmain8.c: New file.
* sysdeps/x86_64/ifuncmod8.c: Likewise.
* sysdeps/x86_64/nptl/tcb-offsets.sym (RTLD_SAVESPACE_SSE):
Removed.
* sysdeps/x86_64/nptl/tls.h (__128bits): Removed.
(tcbhead_t): Change rtld_must_xmm_save to __glibc_unused1.
Change rtld_savespace_sse to __glibc_unused2.
(RTLD_CHECK_FOREIGN_CALL): Removed.
(RTLD_ENABLE_FOREIGN_CALL): Likewise.
(RTLD_PREPARE_FOREIGN_CALL): Likewise.
(RTLD_FINALIZE_FOREIGN_CALL): Likewise.
diff --git a/ChangeLog b/ChangeLog
index 457778a..0dfa3b3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,30 @@
+2015-08-25 H.J. Lu <hongjiu.lu@intel.com>
+
+ [BZ #15128]
+ * sysdeps/x86_64/Makefile [$(subdir) == elf] (tests): Add
+ ifuncmain8.
+ (modules-names): Add ifuncmod8.
+ ($(objpfx)ifuncmain8): New rule.
+ * sysdeps/x86_64/dl-machine.h: Include <dl-procinfo.h> and
+ <cpuid.h>.
+ (elf_machine_runtime_setup): Use _dl_runtime_resolve_sse,
+ _dl_runtime_resolve_avx, or _dl_runtime_resolve_avx512,
+ _dl_runtime_profile_sse, _dl_runtime_profile_avx, or
+ _dl_runtime_profile_avx512, based on HAS_ARCH_FEATURE.
+ * sysdeps/x86_64/dl-trampoline.S: Rewrite.
+ * sysdeps/x86_64/dl-trampoline.h: Likewise.
+ * sysdeps/x86_64/ifuncmain8.c: New file.
+ * sysdeps/x86_64/ifuncmod8.c: Likewise.
+ * sysdeps/x86_64/nptl/tcb-offsets.sym (RTLD_SAVESPACE_SSE):
+ Removed.
+ * sysdeps/x86_64/nptl/tls.h (__128bits): Removed.
+ (tcbhead_t): Change rtld_must_xmm_save to __glibc_unused1.
+ Change rtld_savespace_sse to __glibc_unused2.
+ (RTLD_CHECK_FOREIGN_CALL): Removed.
+ (RTLD_ENABLE_FOREIGN_CALL): Likewise.
+ (RTLD_PREPARE_FOREIGN_CALL): Likewise.
+ (RTLD_FINALIZE_FOREIGN_CALL): Likewise.
+
2015-08-24 Wilco Dijkstra <wdijkstr@arm.com>
* sysdeps/aarch64/bzero.S (__bzero): Remove.
diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
index 91875f0..e50bcad 100644
--- a/sysdeps/x86_64/Makefile
+++ b/sysdeps/x86_64/Makefile
@@ -21,6 +21,11 @@ endif
ifeq ($(subdir),elf)
sysdep-dl-routines += tlsdesc dl-tlsdesc
+tests += ifuncmain8
+modules-names += ifuncmod8
+
+$(objpfx)ifuncmain8: $(objpfx)ifuncmod8.so
+
tests += tst-quad1 tst-quad2
modules-names += tst-quadmod1 tst-quadmod2
diff --git a/sysdeps/x86_64/dl-machine.h b/sysdeps/x86_64/dl-machine.h
index d22359d..32d25da 100644
--- a/sysdeps/x86_64/dl-machine.h
+++ b/sysdeps/x86_64/dl-machine.h
@@ -66,8 +66,12 @@ static inline int __attribute__ ((unused, always_inline))
elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
{
Elf64_Addr *got;
- extern void _dl_runtime_resolve (ElfW(Word)) attribute_hidden;
- extern void _dl_runtime_profile (ElfW(Word)) attribute_hidden;
+ extern void _dl_runtime_resolve_sse (ElfW(Word)) attribute_hidden;
+ extern void _dl_runtime_resolve_avx (ElfW(Word)) attribute_hidden;
+ extern void _dl_runtime_resolve_avx512 (ElfW(Word)) attribute_hidden;
+ extern void _dl_runtime_profile_sse (ElfW(Word)) attribute_hidden;
+ extern void _dl_runtime_profile_avx (ElfW(Word)) attribute_hidden;
+ extern void _dl_runtime_profile_avx512 (ElfW(Word)) attribute_hidden;
if (l->l_info[DT_JMPREL] && lazy)
{
@@ -95,7 +99,12 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
end in this function. */
if (__glibc_unlikely (profile))
{
- *(ElfW(Addr) *) (got + 2) = (ElfW(Addr)) &_dl_runtime_profile;
+ if (HAS_ARCH_FEATURE (AVX512F_Usable))
+ *(ElfW(Addr) *) (got + 2) = (ElfW(Addr)) &_dl_runtime_profile_avx512;
+ else if (HAS_ARCH_FEATURE (AVX_Usable))
+ *(ElfW(Addr) *) (got + 2) = (ElfW(Addr)) &_dl_runtime_profile_avx;
+ else
+ *(ElfW(Addr) *) (got + 2) = (ElfW(Addr)) &_dl_runtime_profile_sse;
if (GLRO(dl_profile) != NULL
&& _dl_name_match_p (GLRO(dl_profile), l))
@@ -104,9 +113,17 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
GL(dl_profile_map) = l;
}
else
- /* This function will get called to fix up the GOT entry indicated by
- the offset on the stack, and then jump to the resolved address. */
- *(ElfW(Addr) *) (got + 2) = (ElfW(Addr)) &_dl_runtime_resolve;
+ {
+ /* This function will get called to fix up the GOT entry
+ indicated by the offset on the stack, and then jump to
+ the resolved address. */
+ if (HAS_ARCH_FEATURE (AVX512F_Usable))
+ *(ElfW(Addr) *) (got + 2) = (ElfW(Addr)) &_dl_runtime_resolve_avx512;
+ else if (HAS_ARCH_FEATURE (AVX_Usable))
+ *(ElfW(Addr) *) (got + 2) = (ElfW(Addr)) &_dl_runtime_resolve_avx;
+ else
+ *(ElfW(Addr) *) (got + 2) = (ElfW(Addr)) &_dl_runtime_resolve_sse;
+ }
}
if (l->l_info[ADDRIDX (DT_TLSDESC_GOT)] && lazy)
diff --git a/sysdeps/x86_64/dl-trampoline.S b/sysdeps/x86_64/dl-trampoline.S
index 678c57f..8475d26 100644
--- a/sysdeps/x86_64/dl-trampoline.S
+++ b/sysdeps/x86_64/dl-trampoline.S
@@ -20,23 +20,40 @@
#include <sysdep.h>
#include <link-defines.h>
-#if (RTLD_SAVESPACE_SSE % 32) != 0
-# error RTLD_SAVESPACE_SSE must be aligned to 32 bytes
+#ifndef DL_STACK_ALIGNMENT
+/* Due to GCC bug:
+
+ https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58066
+
+ __tls_get_addr may be called with 8-byte stack alignment. Although
+ this bug has been fixed in GCC 4.9.4, 5.3 and 6, we can't assume
+ that stack will be always aligned at 16 bytes. We use unaligned
+ 16-byte move to load and store SSE registers, which has no penalty
+ on modern processors if stack is 16-byte aligned. */
+# define DL_STACK_ALIGNMENT 8
+#endif
+
+#ifndef DL_RUNIME_UNALIGNED_VEC_SIZE
+/* The maximum size of unaligned vector load and store. */
+# define DL_RUNIME_UNALIGNED_VEC_SIZE 16
#endif
+/* True if _dl_runtime_resolve should align stack to VEC_SIZE bytes. */
+#define DL_RUNIME_RESOLVE_REALIGN_STACK \
+ (VEC_SIZE > DL_STACK_ALIGNMENT \
+ && VEC_SIZE > DL_RUNIME_UNALIGNED_VEC_SIZE)
+
+/* Align vector register save area to 16 bytes. */
+#define REGISTER_SAVE_VEC_OFF 0
+
/* Area on stack to save and restore registers used for parameter
passing when calling _dl_fixup. */
#ifdef __ILP32__
-/* X32 saves RCX, RDX, RSI, RDI, R8 and R9 plus RAX. */
-# define REGISTER_SAVE_AREA (8 * 7)
-# define REGISTER_SAVE_RAX 0
+# define REGISTER_SAVE_RAX (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 8)
# define PRESERVE_BND_REGS_PREFIX
#else
-/* X86-64 saves RCX, RDX, RSI, RDI, R8 and R9 plus RAX as well as BND0,
- BND1, BND2, BND3. */
-# define REGISTER_SAVE_AREA (8 * 7 + 16 * 4)
/* Align bound register save area to 16 bytes. */
-# define REGISTER_SAVE_BND0 0
+# define REGISTER_SAVE_BND0 (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 8)
# define REGISTER_SAVE_BND1 (REGISTER_SAVE_BND0 + 16)
# define REGISTER_SAVE_BND2 (REGISTER_SAVE_BND1 + 16)
# define REGISTER_SAVE_BND3 (REGISTER_SAVE_BND2 + 16)
@@ -54,386 +71,53 @@
#define REGISTER_SAVE_R8 (REGISTER_SAVE_RDI + 8)
#define REGISTER_SAVE_R9 (REGISTER_SAVE_R8 + 8)
- .text
- .globl _dl_runtime_resolve
- .type _dl_runtime_resolve, @function
- .align 16
- cfi_startproc
-_dl_runtime_resolve:
- cfi_adjust_cfa_offset(16) # Incorporate PLT
- subq $REGISTER_SAVE_AREA,%rsp
- cfi_adjust_cfa_offset(REGISTER_SAVE_AREA)
- # Preserve registers otherwise clobbered.
- movq %rax, REGISTER_SAVE_RAX(%rsp)
- movq %rcx, REGISTER_SAVE_RCX(%rsp)
- movq %rdx, REGISTER_SAVE_RDX(%rsp)
- movq %rsi, REGISTER_SAVE_RSI(%rsp)
- movq %rdi, REGISTER_SAVE_RDI(%rsp)
- movq %r8, REGISTER_SAVE_R8(%rsp)
- movq %r9, REGISTER_SAVE_R9(%rsp)
-#ifndef __ILP32__
- # We also have to preserve bound registers. These are nops if
- # Intel MPX isn't available or disabled.
-# ifdef HAVE_MPX_SUPPORT
- bndmov %bnd0, REGISTER_SAVE_BND0(%rsp)
- bndmov %bnd1, REGISTER_SAVE_BND1(%rsp)
- bndmov %bnd2, REGISTER_SAVE_BND2(%rsp)
- bndmov %bnd3, REGISTER_SAVE_BND3(%rsp)
-# else
-# if REGISTER_SAVE_BND0 == 0
- .byte 0x66,0x0f,0x1b,0x04,0x24
-# else
- .byte 0x66,0x0f,0x1b,0x44,0x24,REGISTER_SAVE_BND0
-# endif
- .byte 0x66,0x0f,0x1b,0x4c,0x24,REGISTER_SAVE_BND1
- .byte 0x66,0x0f,0x1b,0x54,0x24,REGISTER_SAVE_BND2
- .byte 0x66,0x0f,0x1b,0x5c,0x24,REGISTER_SAVE_BND3
-# endif
-#endif
- # Copy args pushed by PLT in register.
- # %rdi: link_map, %rsi: reloc_index
- movq (REGISTER_SAVE_AREA + 8)(%rsp), %rsi
- movq REGISTER_SAVE_AREA(%rsp), %rdi
- call _dl_fixup # Call resolver.
- movq %rax, %r11 # Save return value
-#ifndef __ILP32__
- # Restore bound registers. These are nops if Intel MPX isn't
- # avaiable or disabled.
-# ifdef HAVE_MPX_SUPPORT
- bndmov REGISTER_SAVE_BND3(%rsp), %bnd3
- bndmov REGISTER_SAVE_BND2(%rsp), %bnd2
- bndmov REGISTER_SAVE_BND1(%rsp), %bnd1
- bndmov REGISTER_SAVE_BND0(%rsp), %bnd0
-# else
- .byte 0x66,0x0f,0x1a,0x5c,0x24,REGISTER_SAVE_BND3
- .byte 0x66,0x0f,0x1a,0x54,0x24,REGISTER_SAVE_BND2
- .byte 0x66,0x0f,0x1a,0x4c,0x24,REGISTER_SAVE_BND1
-# if REGISTER_SAVE_BND0 == 0
- .byte 0x66,0x0f,0x1a,0x04,0x24
-# else
- .byte 0x66,0x0f,0x1a,0x44,0x24,REGISTER_SAVE_BND0
-# endif
-# endif
+#define VEC_SIZE 64
+#define VMOVA vmovdqa64
+#if DL_RUNIME_RESOLVE_REALIGN_STACK || VEC_SIZE <= DL_STACK_ALIGNMENT
+# define VMOV vmovdqa64
+#else
+# define VMOV vmovdqu64
#endif
- # Get register content back.
- movq REGISTER_SAVE_R9(%rsp), %r9
- movq REGISTER_SAVE_R8(%rsp), %r8
- movq REGISTER_SAVE_RDI(%rsp), %rdi
- movq REGISTER_SAVE_RSI(%rsp), %rsi
- movq REGISTER_SAVE_RDX(%rsp), %rdx
- movq REGISTER_SAVE_RCX(%rsp), %rcx
- movq REGISTER_SAVE_RAX(%rsp), %rax
- # Adjust stack(PLT did 2 pushes)
- addq $(REGISTER_SAVE_AREA + 16), %rsp
- cfi_adjust_cfa_offset(-(REGISTER_SAVE_AREA + 16))
- # Preserve bound registers.
- PRESERVE_BND_REGS_PREFIX
- jmp *%r11 # Jump to function address.
- cfi_endproc
- .size _dl_runtime_resolve, .-_dl_runtime_resolve
-
-
-#ifndef PROF
- .globl _dl_runtime_profile
- .type _dl_runtime_profile, @function
- .align 16
- cfi_startproc
-
-_dl_runtime_profile:
- cfi_adjust_cfa_offset(16) # Incorporate PLT
- /* The La_x86_64_regs data structure pointed to by the
- fourth paramater must be 16-byte aligned. This must
- be explicitly enforced. We have the set up a dynamically
- sized stack frame. %rbx points to the top half which
- has a fixed size and preserves the original stack pointer. */
-
- subq $32, %rsp # Allocate the local storage.
- cfi_adjust_cfa_offset(32)
- movq %rbx, (%rsp)
- cfi_rel_offset(%rbx, 0)
-
- /* On the stack:
- 56(%rbx) parameter #1
- 48(%rbx) return address
-
- 40(%rbx) reloc index
- 32(%rbx) link_map
-
- 24(%rbx) La_x86_64_regs pointer
- 16(%rbx) framesize
- 8(%rbx) rax
- (%rbx) rbx
- */
-
- movq %rax, 8(%rsp)
- movq %rsp, %rbx
- cfi_def_cfa_register(%rbx)
-
- /* Actively align the La_x86_64_regs structure. */
- andq $0xfffffffffffffff0, %rsp
-# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_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)
-
- /* Fill the La_x86_64_regs structure. */
- movq %rdx, LR_RDX_OFFSET(%rsp)
- movq %r8, LR_R8_OFFSET(%rsp)
- movq %r9, LR_R9_OFFSET(%rsp)
- movq %rcx, LR_RCX_OFFSET(%rsp)
- movq %rsi, LR_RSI_OFFSET(%rsp)
- movq %rdi, LR_RDI_OFFSET(%rsp)
- movq %rbp, LR_RBP_OFFSET(%rsp)
-
- leaq 48(%rbx), %rax
- movq %rax, LR_RSP_OFFSET(%rsp)
-
- /* We always store the XMM registers even if AVX is available.
- This is to provide backward binary compatibility for existing
- audit modules. */
- movaps %xmm0, (LR_XMM_OFFSET)(%rsp)
- movaps %xmm1, (LR_XMM_OFFSET + XMM_SIZE)(%rsp)
- movaps %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp)
- movaps %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp)
- movaps %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp)
- movaps %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp)
- movaps %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp)
- movaps %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp)
-
-# ifndef __ILP32__
-# ifdef HAVE_MPX_SUPPORT
- bndmov %bnd0, (LR_BND_OFFSET)(%rsp) # Preserve bound
- bndmov %bnd1, (LR_BND_OFFSET + BND_SIZE)(%rsp) # registers. Nops if
- bndmov %bnd2, (LR_BND_OFFSET + BND_SIZE*2)(%rsp) # MPX not available
- bndmov %bnd3, (LR_BND_OFFSET + BND_SIZE*3)(%rsp) # or disabled.
-# else
- .byte 0x66,0x0f,0x1b,0x84,0x24;.long (LR_BND_OFFSET)
- .byte 0x66,0x0f,0x1b,0x8c,0x24;.long (LR_BND_OFFSET + BND_SIZE)
- .byte 0x66,0x0f,0x1b,0x94,0x24;.long (LR_BND_OFFSET + BND_SIZE*2)
- .byte 0x66,0x0f,0x1b,0x9c,0x24;.long (LR_BND_OFFSET + BND_SIZE*3)
-# endif
-# endif
-
-# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT
- .data
-L(have_avx):
- .zero 4
- .size L(have_avx), 4
- .previous
-
- cmpl $0, L(have_avx)(%rip)
- jne L(defined)
- movq %rbx, %r11 # Save rbx
- movl $1, %eax
- cpuid
- movq %r11,%rbx # Restore rbx
- xorl %eax, %eax
- // AVX and XSAVE supported?
- andl $((1 << 28) | (1 << 27)), %ecx
- cmpl $((1 << 28) | (1 << 27)), %ecx
- jne 10f
-# ifdef HAVE_AVX512_ASM_SUPPORT
- // AVX512 supported in processor?
- movq %rbx, %r11 # Save rbx
- xorl %ecx, %ecx
- mov $0x7, %eax
- cpuid
- andl $(1 << 16), %ebx
-# endif
- xorl %ecx, %ecx
- // Get XFEATURE_ENABLED_MASK
- xgetbv
-# ifdef HAVE_AVX512_ASM_SUPPORT
- test %ebx, %ebx
- movq %r11, %rbx # Restore rbx
- je 20f
- // Verify that XCR0[7:5] = '111b' and
- // XCR0[2:1] = '11b' which means
- // that zmm state is enabled
- andl $0xe6, %eax
- cmpl $0xe6, %eax
- jne 20f
- movl %eax, L(have_avx)(%rip)
-L(avx512):
-# define RESTORE_AVX
-# define VMOV vmovdqu64
-# define VEC(i) zmm##i
-# define MORE_CODE
-# include "dl-trampoline.h"
-# undef VMOV
-# undef VEC
-# undef RESTORE_AVX
-# endif
-20: andl $0x6, %eax
-10: subl $0x5, %eax
- movl %eax, L(have_avx)(%rip)
- cmpl $0, %eax
-
-L(defined):
- js L(no_avx)
-# ifdef HAVE_AVX512_ASM_SUPPORT
- cmpl $0xe6, L(have_avx)(%rip)
- je L(avx512)
-# endif
-
-# define RESTORE_AVX
-# define VMOV vmovdqu
-# define VEC(i) ymm##i
-# define MORE_CODE
-# include "dl-trampoline.h"
-
- .align 16
-L(no_avx):
-# endif
-
-# undef RESTORE_AVX
-# include "dl-trampoline.h"
-
- cfi_endproc
- .size _dl_runtime_profile, .-_dl_runtime_profile
+#define VEC(i) zmm##i
+#define _dl_runtime_resolve _dl_runtime_resolve_avx512
+#define _dl_runtime_profile _dl_runtime_profile_avx512
+#define RESTORE_AVX
+#include "dl-trampoline.h"
+#undef _dl_runtime_resolve
+#undef _dl_runtime_profile
+#undef VEC
+#undef VMOV
+#undef VMOVA
+#undef VEC_SIZE
+
+#define VEC_SIZE 32
+#define VMOVA vmovdqa
+#if DL_RUNIME_RESOLVE_REALIGN_STACK || VEC_SIZE <= DL_STACK_ALIGNMENT
+# define VMOV vmovdqa
+#else
+# define VMOV vmovdqu
#endif
-
-
-#ifdef SHARED
- .globl _dl_x86_64_save_sse
- .type _dl_x86_64_save_sse, @function
- .align 16
- cfi_startproc
-_dl_x86_64_save_sse:
-# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT
- cmpl $0, L(have_avx)(%rip)
- jne L(defined_5)
- movq %rbx, %r11 # Save rbx
- movl $1, %eax
- cpuid
- movq %r11,%rbx # Restore rbx
- xorl %eax, %eax
- // AVX and XSAVE supported?
- andl $((1 << 28) | (1 << 27)), %ecx
- cmpl $((1 << 28) | (1 << 27)), %ecx
- jne 1f
-# ifdef HAVE_AVX512_ASM_SUPPORT
- // AVX512 supported in a processor?
- movq %rbx, %r11 # Save rbx
- xorl %ecx,%ecx
- mov $0x7,%eax
- cpuid
- andl $(1 << 16), %ebx
-# endif
- xorl %ecx, %ecx
- // Get XFEATURE_ENABLED_MASK
- xgetbv
-# ifdef HAVE_AVX512_ASM_SUPPORT
- test %ebx, %ebx
- movq %r11, %rbx # Restore rbx
- je 2f
- // Verify that XCR0[7:5] = '111b' and
- // XCR0[2:1] = '11b' which means
- // that zmm state is enabled
- andl $0xe6, %eax
- movl %eax, L(have_avx)(%rip)
- cmpl $0xe6, %eax
- je L(avx512_5)
-# endif
-
-2: andl $0x6, %eax
-1: subl $0x5, %eax
- movl %eax, L(have_avx)(%rip)
- cmpl $0, %eax
-
-L(defined_5):
- js L(no_avx5)
-# ifdef HAVE_AVX512_ASM_SUPPORT
- cmpl $0xe6, L(have_avx)(%rip)
- je L(avx512_5)
-# endif
-
- vmovdqa %ymm0, %fs:RTLD_SAVESPACE_SSE+0*YMM_SIZE
- vmovdqa %ymm1, %fs:RTLD_SAVESPACE_SSE+1*YMM_SIZE
- vmovdqa %ymm2, %fs:RTLD_SAVESPACE_SSE+2*YMM_SIZE
- vmovdqa %ymm3, %fs:RTLD_SAVESPACE_SSE+3*YMM_SIZE
- vmovdqa %ymm4, %fs:RTLD_SAVESPACE_SSE+4*YMM_SIZE
- vmovdqa %ymm5, %fs:RTLD_SAVESPACE_SSE+5*YMM_SIZE
- vmovdqa %ymm6, %fs:RTLD_SAVESPACE_SSE+6*YMM_SIZE
- vmovdqa %ymm7, %fs:RTLD_SAVESPACE_SSE+7*YMM_SIZE
- ret
-# ifdef HAVE_AVX512_ASM_SUPPORT
-L(avx512_5):
- vmovdqu64 %zmm0, %fs:RTLD_SAVESPACE_SSE+0*ZMM_SIZE
- vmovdqu64 %zmm1, %fs:RTLD_SAVESPACE_SSE+1*ZMM_SIZE
- vmovdqu64 %zmm2, %fs:RTLD_SAVESPACE_SSE+2*ZMM_SIZE
- vmovdqu64 %zmm3, %fs:RTLD_SAVESPACE_SSE+3*ZMM_SIZE
- vmovdqu64 %zmm4, %fs:RTLD_SAVESPACE_SSE+4*ZMM_SIZE
- vmovdqu64 %zmm5, %fs:RTLD_SAVESPACE_SSE+5*ZMM_SIZE
- vmovdqu64 %zmm6, %fs:RTLD_SAVESPACE_SSE+6*ZMM_SIZE
- vmovdqu64 %zmm7, %fs:RTLD_SAVESPACE_SSE+7*ZMM_SIZE
- ret
-# endif
-L(no_avx5):
-# endif
- movdqa %xmm0, %fs:RTLD_SAVESPACE_SSE+0*XMM_SIZE
- movdqa %xmm1, %fs:RTLD_SAVESPACE_SSE+1*XMM_SIZE
- movdqa %xmm2, %fs:RTLD_SAVESPACE_SSE+2*XMM_SIZE
- movdqa %xmm3, %fs:RTLD_SAVESPACE_SSE+3*XMM_SIZE
- movdqa %xmm4, %fs:RTLD_SAVESPACE_SSE+4*XMM_SIZE
- movdqa %xmm5, %fs:RTLD_SAVESPACE_SSE+5*XMM_SIZE
- movdqa %xmm6, %fs:RTLD_SAVESPACE_SSE+6*XMM_SIZE
- movdqa %xmm7, %fs:RTLD_SAVESPACE_SSE+7*XMM_SIZE
- ret
- cfi_endproc
- .size _dl_x86_64_save_sse, .-_dl_x86_64_save_sse
-
-
- .globl _dl_x86_64_restore_sse
- .type _dl_x86_64_restore_sse, @function
- .align 16
- cfi_startproc
-_dl_x86_64_restore_sse:
-# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT
- cmpl $0, L(have_avx)(%rip)
- js L(no_avx6)
-# ifdef HAVE_AVX512_ASM_SUPPORT
- cmpl $0xe6, L(have_avx)(%rip)
- je L(avx512_6)
-# endif
-
- vmovdqa %fs:RTLD_SAVESPACE_SSE+0*YMM_SIZE, %ymm0
- vmovdqa %fs:RTLD_SAVESPACE_SSE+1*YMM_SIZE, %ymm1
- vmovdqa %fs:RTLD_SAVESPACE_SSE+2*YMM_SIZE, %ymm2
- vmovdqa %fs:RTLD_SAVESPACE_SSE+3*YMM_SIZE, %ymm3
- vmovdqa %fs:RTLD_SAVESPACE_SSE+4*YMM_SIZE, %ymm4
- vmovdqa %fs:RTLD_SAVESPACE_SSE+5*YMM_SIZE, %ymm5
- vmovdqa %fs:RTLD_SAVESPACE_SSE+6*YMM_SIZE, %ymm6
- vmovdqa %fs:RTLD_SAVESPACE_SSE+7*YMM_SIZE, %ymm7
- ret
-# ifdef HAVE_AVX512_ASM_SUPPORT
-L(avx512_6):
- vmovdqu64 %fs:RTLD_SAVESPACE_SSE+0*ZMM_SIZE, %zmm0
- vmovdqu64 %fs:RTLD_SAVESPACE_SSE+1*ZMM_SIZE, %zmm1
- vmovdqu64 %fs:RTLD_SAVESPACE_SSE+2*ZMM_SIZE, %zmm2
- vmovdqu64 %fs:RTLD_SAVESPACE_SSE+3*ZMM_SIZE, %zmm3
- vmovdqu64 %fs:RTLD_SAVESPACE_SSE+4*ZMM_SIZE, %zmm4
- vmovdqu64 %fs:RTLD_SAVESPACE_SSE+5*ZMM_SIZE, %zmm5
- vmovdqu64 %fs:RTLD_SAVESPACE_SSE+6*ZMM_SIZE, %zmm6
- vmovdqu64 %fs:RTLD_SAVESPACE_SSE+7*ZMM_SIZE, %zmm7
- ret
-# endif
-L(no_avx6):
-# endif
- movdqa %fs:RTLD_SAVESPACE_SSE+0*XMM_SIZE, %xmm0
- movdqa %fs:RTLD_SAVESPACE_SSE+1*XMM_SIZE, %xmm1
- movdqa %fs:RTLD_SAVESPACE_SSE+2*XMM_SIZE, %xmm2
- movdqa %fs:RTLD_SAVESPACE_SSE+3*XMM_SIZE, %xmm3
- movdqa %fs:RTLD_SAVESPACE_SSE+4*XMM_SIZE, %xmm4
- movdqa %fs:RTLD_SAVESPACE_SSE+5*XMM_SIZE, %xmm5
- movdqa %fs:RTLD_SAVESPACE_SSE+6*XMM_SIZE, %xmm6
- movdqa %fs:RTLD_SAVESPACE_SSE+7*XMM_SIZE, %xmm7
- ret
- cfi_endproc
- .size _dl_x86_64_restore_sse, .-_dl_x86_64_restore_sse
+#define VEC(i) ymm##i
+#define _dl_runtime_resolve _dl_runtime_resolve_avx
+#define _dl_runtime_profile _dl_runtime_profile_avx
+#include "dl-trampoline.h"
+#undef _dl_runtime_resolve
+#undef _dl_runtime_profile
+#undef VEC
+#undef VMOV
+#undef VMOVA
+#undef VEC_SIZE
+
+/* movaps/movups is 1-byte shorter. */
+#define VEC_SIZE 16
+#define VMOVA movaps
+#if DL_RUNIME_RESOLVE_REALIGN_STACK || VEC_SIZE <= DL_STACK_ALIGNMENT
+# define VMOV movaps
+#else
+# define VMOV movups
#endif
+#define VEC(i) xmm##i
+#define _dl_runtime_resolve _dl_runtime_resolve_sse
+#define _dl_runtime_profile _dl_runtime_profile_sse
+#undef RESTORE_AVX
+#include "dl-trampoline.h"
diff --git a/sysdeps/x86_64/dl-trampoline.h b/sysdeps/x86_64/dl-trampoline.h
index d542428..dd6d7c7 100644
--- a/sysdeps/x86_64/dl-trampoline.h
+++ b/sysdeps/x86_64/dl-trampoline.h
@@ -1,5 +1,4 @@
-/* Partial PLT profile trampoline to save and restore x86-64 vector
- registers.
+/* PLT trampolines. x86-64 version.
Copyright (C) 2009-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -17,16 +16,252 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#ifdef RESTORE_AVX
+#undef REGISTER_SAVE_AREA_RAW
+#ifdef __ILP32__
+/* X32 saves RCX, RDX, RSI, RDI, R8 and R9 plus RAX as well as VEC0 to
+ VEC7. */
+# define REGISTER_SAVE_AREA_RAW (8 * 7 + VEC_SIZE * 8)
+#else
+/* X86-64 saves RCX, RDX, RSI, RDI, R8 and R9 plus RAX as well as
+ BND0, BND1, BND2, BND3 and VEC0 to VEC7. */
+# define REGISTER_SAVE_AREA_RAW (8 * 7 + 16 * 4 + VEC_SIZE * 8)
+#endif
+
+#undef REGISTER_SAVE_AREA
+#undef LOCAL_STORAGE_AREA
+#undef BASE
+#if DL_RUNIME_RESOLVE_REALIGN_STACK
+# define REGISTER_SAVE_AREA (REGISTER_SAVE_AREA_RAW + 8)
+/* Local stack area before jumping to function address: RBX. */
+# define LOCAL_STORAGE_AREA 8
+# define BASE rbx
+# if (REGISTER_SAVE_AREA % VEC_SIZE) != 0
+# error REGISTER_SAVE_AREA must be multples of VEC_SIZE
+# endif
+#else
+# define REGISTER_SAVE_AREA REGISTER_SAVE_AREA_RAW
+/* Local stack area before jumping to function address: All saved
+ registers. */
+# define LOCAL_STORAGE_AREA REGISTER_SAVE_AREA
+# define BASE rsp
+# if (REGISTER_SAVE_AREA % 16) != 8
+# error REGISTER_SAVE_AREA must be odd multples of 8
+# endif
+#endif
+
+ .text
+ .globl _dl_runtime_resolve
+ .hidden _dl_runtime_resolve
+ .type _dl_runtime_resolve, @function
+ .align 16
+ cfi_startproc
+_dl_runtime_resolve:
+ cfi_adjust_cfa_offset(16) # Incorporate PLT
+#if DL_RUNIME_RESOLVE_REALIGN_STACK
+# if LOCAL_STORAGE_AREA != 8
+# error LOCAL_STORAGE_AREA must be 8
+# endif
+ pushq %rbx # push subtracts stack by 8.
+ cfi_adjust_cfa_offset(8)
+ cfi_rel_offset(%rbx, 0)
+ mov %RSP_LP, %RBX_LP
+ cfi_def_cfa_register(%rbx)
+ and $-VEC_SIZE, %RSP_LP
+#endif
+ sub $REGISTER_SAVE_AREA, %RSP_LP
+ cfi_adjust_cfa_offset(REGISTER_SAVE_AREA)
+ # Preserve registers otherwise clobbered.
+ movq %rax, REGISTER_SAVE_RAX(%rsp)
+ movq %rcx, REGISTER_SAVE_RCX(%rsp)
+ movq %rdx, REGISTER_SAVE_RDX(%rsp)
+ movq %rsi, REGISTER_SAVE_RSI(%rsp)
+ movq %rdi, REGISTER_SAVE_RDI(%rsp)
+ movq %r8, REGISTER_SAVE_R8(%rsp)
+ movq %r9, REGISTER_SAVE_R9(%rsp)
+ VMOV %VEC(0), (REGISTER_SAVE_VEC_OFF)(%rsp)
+ VMOV %VEC(1), (REGISTER_SAVE_VEC_OFF + VEC_SIZE)(%rsp)
+ VMOV %VEC(2), (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 2)(%rsp)
+ VMOV %VEC(3), (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 3)(%rsp)
+ VMOV %VEC(4), (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 4)(%rsp)
+ VMOV %VEC(5), (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 5)(%rsp)
+ VMOV %VEC(6), (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 6)(%rsp)
+ VMOV %VEC(7), (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 7)(%rsp)
+#ifndef __ILP32__
+ # We also have to preserve bound registers. These are nops if
+ # Intel MPX isn't available or disabled.
+# ifdef HAVE_MPX_SUPPORT
+ bndmov %bnd0, REGISTER_SAVE_BND0(%rsp)
+ bndmov %bnd1, REGISTER_SAVE_BND1(%rsp)
+ bndmov %bnd2, REGISTER_SAVE_BND2(%rsp)
+ bndmov %bnd3, REGISTER_SAVE_BND3(%rsp)
+# else
+# if REGISTER_SAVE_BND0 == 0
+ .byte 0x66,0x0f,0x1b,0x04,0x24
+# else
+ .byte 0x66,0x0f,0x1b,0x44,0x24,REGISTER_SAVE_BND0
+# endif
+ .byte 0x66,0x0f,0x1b,0x4c,0x24,REGISTER_SAVE_BND1
+ .byte 0x66,0x0f,0x1b,0x54,0x24,REGISTER_SAVE_BND2
+ .byte 0x66,0x0f,0x1b,0x5c,0x24,REGISTER_SAVE_BND3
+# endif
+#endif
+ # Copy args pushed by PLT in register.
+ # %rdi: link_map, %rsi: reloc_index
+ mov (LOCAL_STORAGE_AREA + 8)(%BASE), %RSI_LP
+ mov LOCAL_STORAGE_AREA(%BASE), %RDI_LP
+ call _dl_fixup # Call resolver.
+ mov %RAX_LP, %R11_LP # Save return value
+#ifndef __ILP32__
+ # Restore bound registers. These are nops if Intel MPX isn't
+ # avaiable or disabled.
+# ifdef HAVE_MPX_SUPPORT
+ bndmov REGISTER_SAVE_BND3(%rsp), %bnd3
+ bndmov REGISTER_SAVE_BND2(%rsp), %bnd2
+ bndmov REGISTER_SAVE_BND1(%rsp), %bnd1
+ bndmov REGISTER_SAVE_BND0(%rsp), %bnd0
+# else
+ .byte 0x66,0x0f,0x1a,0x5c,0x24,REGISTER_SAVE_BND3
+ .byte 0x66,0x0f,0x1a,0x54,0x24,REGISTER_SAVE_BND2
+ .byte 0x66,0x0f,0x1a,0x4c,0x24,REGISTER_SAVE_BND1
+# if REGISTER_SAVE_BND0 == 0
+ .byte 0x66,0x0f,0x1a,0x04,0x24
+# else
+ .byte 0x66,0x0f,0x1a,0x44,0x24,REGISTER_SAVE_BND0
+# endif
+# endif
+#endif
+ # Get register content back.
+ movq REGISTER_SAVE_R9(%rsp), %r9
+ movq REGISTER_SAVE_R8(%rsp), %r8
+ movq REGISTER_SAVE_RDI(%rsp), %rdi
+ movq REGISTER_SAVE_RSI(%rsp), %rsi
+ movq REGISTER_SAVE_RDX(%rsp), %rdx
+ movq REGISTER_SAVE_RCX(%rsp), %rcx
+ movq REGISTER_SAVE_RAX(%rsp), %rax
+ VMOV (REGISTER_SAVE_VEC_OFF)(%rsp), %VEC(0)
+ VMOV (REGISTER_SAVE_VEC_OFF + VEC_SIZE)(%rsp), %VEC(1)
+ VMOV (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 2)(%rsp), %VEC(2)
+ VMOV (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 3)(%rsp), %VEC(3)
+ VMOV (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 4)(%rsp), %VEC(4)
+ VMOV (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 5)(%rsp), %VEC(5)
+ VMOV (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 6)(%rsp), %VEC(6)
+ VMOV (REGISTER_SAVE_VEC_OFF + VEC_SIZE * 7)(%rsp), %VEC(7)
+#if DL_RUNIME_RESOLVE_REALIGN_STACK
+ mov %RBX_LP, %RSP_LP
+ cfi_def_cfa_register(%rsp)
+ movq (%rsp), %rbx
+ cfi_restore(%rbx)
+#endif
+ # Adjust stack(PLT did 2 pushes)
+ add $(LOCAL_STORAGE_AREA + 16), %RSP_LP
+ cfi_adjust_cfa_offset(-(LOCAL_STORAGE_AREA + 16))
+ # Preserve bound registers.
+ PRESERVE_BND_REGS_PREFIX
+ jmp *%r11 # Jump to function address.
+ cfi_endproc
+ .size _dl_runtime_resolve, .-_dl_runtime_resolve
+
+
+#ifndef PROF
+# if (LR_VECTOR_OFFSET % VEC_SIZE) != 0
+# error LR_VECTOR_OFFSET must be multples of VEC_SIZE
+# endif
+
+ .globl _dl_runtime_profile
+ .hidden _dl_runtime_profile
+ .type _dl_runtime_profile, @function
+ .align 16
+_dl_runtime_profile:
+ cfi_startproc
+ cfi_adjust_cfa_offset(16) # Incorporate PLT
+ /* The La_x86_64_regs data structure pointed to by the
+ fourth paramater must be VEC_SIZE-byte aligned. This must
+ be explicitly enforced. We have the set up a dynamically
+ sized stack frame. %rbx points to the top half which
+ has a fixed size and preserves the original stack pointer. */
+
+ sub $32, %RSP_LP # Allocate the local storage.
+ cfi_adjust_cfa_offset(32)
+ movq %rbx, (%rsp)
+ cfi_rel_offset(%rbx, 0)
+
+ /* On the stack:
+ 56(%rbx) parameter #1
+ 48(%rbx) return address
+
+ 40(%rbx) reloc index
+ 32(%rbx) link_map
+
+ 24(%rbx) La_x86_64_regs pointer
+ 16(%rbx) framesize
+ 8(%rbx) rax
+ (%rbx) rbx
+ */
+
+ movq %rax, 8(%rsp)
+ mov %RSP_LP, %RBX_LP
+ cfi_def_cfa_register(%rbx)
+
+ /* Actively align the La_x86_64_regs structure. */
+ and $-VEC_SIZE, %RSP_LP
+# if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_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. */
+ sub $(LR_SIZE + XMM_SIZE*8), %RSP_LP
+# else
+ sub $LR_SIZE, %RSP_LP # sizeof(La_x86_64_regs)
+# endif
+ movq %rsp, 24(%rbx)
+
+ /* Fill the La_x86_64_regs structure. */
+ movq %rdx, LR_RDX_OFFSET(%rsp)
+ movq %r8, LR_R8_OFFSET(%rsp)
+ movq %r9, LR_R9_OFFSET(%rsp)
+ movq %rcx, LR_RCX_OFFSET(%rsp)
+ movq %rsi, LR_RSI_OFFSET(%rsp)
+ movq %rdi, LR_RDI_OFFSET(%rsp)
+ movq %rbp, LR_RBP_OFFSET(%rsp)
+
+ lea 48(%rbx), %RAX_LP
+ movq %rax, LR_RSP_OFFSET(%rsp)
+
+ /* We always store the XMM registers even if AVX is available.
+ This is to provide backward binary compatibility for existing
+ audit modules. */
+ movaps %xmm0, (LR_XMM_OFFSET)(%rsp)
+ movaps %xmm1, (LR_XMM_OFFSET + XMM_SIZE)(%rsp)
+ movaps %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp)
+ movaps %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp)
+ movaps %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp)
+ movaps %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp)
+ movaps %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp)
+ movaps %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp)
+
+# ifndef __ILP32__
+# ifdef HAVE_MPX_SUPPORT
+ bndmov %bnd0, (LR_BND_OFFSET)(%rsp) # Preserve bound
+ bndmov %bnd1, (LR_BND_OFFSET + BND_SIZE)(%rsp) # registers. Nops if
+ bndmov %bnd2, (LR_BND_OFFSET + BND_SIZE*2)(%rsp) # MPX not available
+ bndmov %bnd3, (LR_BND_OFFSET + BND_SIZE*3)(%rsp) # or disabled.
+# else
+ .byte 0x66,0x0f,0x1b,0x84,0x24;.long (LR_BND_OFFSET)
+ .byte 0x66,0x0f,0x1b,0x8c,0x24;.long (LR_BND_OFFSET + BND_SIZE)
+ .byte 0x66,0x0f,0x1b,0x94,0x24;.long (LR_BND_OFFSET + BND_SIZE*2)
+ .byte 0x66,0x0f,0x1b,0x9c,0x24;.long (LR_BND_OFFSET + BND_SIZE*3)
+# endif
+# endif
+
+# ifdef RESTORE_AVX
/* This is to support AVX audit modules. */
- VMOV %VEC(0), (LR_VECTOR_OFFSET)(%rsp)
- VMOV %VEC(1), (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp)
- VMOV %VEC(2), (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp)
- VMOV %VEC(3), (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp)
- VMOV %VEC(4), (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp)
- VMOV %VEC(5), (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp)
- VMOV %VEC(6), (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp)
- VMOV %VEC(7), (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp)
+ VMOVA %VEC(0), (LR_VECTOR_OFFSET)(%rsp)
+ VMOVA %VEC(1), (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp)
+ VMOVA %VEC(2), (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp)
+ VMOVA %VEC(3), (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp)
+ VMOVA %VEC(4), (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp)
+ VMOVA %VEC(5), (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp)
+ VMOVA %VEC(6), (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp)
+ VMOVA %VEC(7), (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp)
/* Save xmm0-xmm7 registers to detect if any of them are
changed by audit module. */
@@ -38,7 +273,7 @@
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
+# endif
mov %RSP_LP, %RCX_LP # La_x86_64_regs pointer to %rcx.
mov 48(%rbx), %RDX_LP # Load return address if needed.
@@ -63,7 +298,7 @@
movaps (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp), %xmm6
movaps (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp), %xmm7
-#ifdef RESTORE_AVX
+# ifdef RESTORE_AVX
/* Check if any xmm0-xmm7 registers are changed by audit
module. */
vpcmpeqq (LR_SIZE)(%rsp), %xmm0, %xmm8
@@ -72,7 +307,7 @@
je 2f
vmovdqa %xmm0, (LR_VECTOR_OFFSET)(%rsp)
jmp 1f
-2: VMOV (LR_VECTOR_OFFSET)(%rsp), %VEC(0)
+2: VMOVA (LR_VECTOR_OFFSET)(%rsp), %VEC(0)
vmovdqa %xmm0, (LR_XMM_OFFSET)(%rsp)
1: vpcmpeqq (LR_SIZE + XMM_SIZE)(%rsp), %xmm1, %xmm8
@@ -81,7 +316,7 @@
je 2f
vmovdqa %xmm1, (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp)
jmp 1f
-2: VMOV (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp), %VEC(1)
+2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp), %VEC(1)
vmovdqa %xmm1, (LR_XMM_OFFSET + XMM_SIZE)(%rsp)
1: vpcmpeqq (LR_SIZE + XMM_SIZE*2)(%rsp), %xmm2, %xmm8
@@ -90,7 +325,7 @@
je 2f
vmovdqa %xmm2, (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp)
jmp 1f
-2: VMOV (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp), %VEC(2)
+2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp), %VEC(2)
vmovdqa %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp)
1: vpcmpeqq (LR_SIZE + XMM_SIZE*3)(%rsp), %xmm3, %xmm8
@@ -99,7 +334,7 @@
je 2f
vmovdqa %xmm3, (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp)
jmp 1f
-2: VMOV (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp), %VEC(3)
+2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp), %VEC(3)
vmovdqa %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp)
1: vpcmpeqq (LR_SIZE + XMM_SIZE*4)(%rsp), %xmm4, %xmm8
@@ -108,7 +343,7 @@
je 2f
vmovdqa %xmm4, (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp)
jmp 1f
-2: VMOV (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp), %VEC(4)
+2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp), %VEC(4)
vmovdqa %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp)
1: vpcmpeqq (LR_SIZE + XMM_SIZE*5)(%rsp), %xmm5, %xmm8
@@ -117,7 +352,7 @@
je 2f
vmovdqa %xmm5, (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp)
jmp 1f
-2: VMOV (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp), %VEC(5)
+2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp), %VEC(5)
vmovdqa %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp)
1: vpcmpeqq (LR_SIZE + XMM_SIZE*6)(%rsp), %xmm6, %xmm8
@@ -126,7 +361,7 @@
je 2f
vmovdqa %xmm6, (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp)
jmp 1f
-2: VMOV (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp), %VEC(6)
+2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp), %VEC(6)
vmovdqa %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp)
1: vpcmpeqq (LR_SIZE + XMM_SIZE*7)(%rsp), %xmm7, %xmm8
@@ -135,25 +370,25 @@
je 2f
vmovdqa %xmm7, (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp)
jmp 1f
-2: VMOV (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp), %VEC(7)
+2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp), %VEC(7)
vmovdqa %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp)
1:
-#endif
+# endif
-#ifndef __ILP32__
-# ifdef HAVE_MPX_SUPPORT
+# ifndef __ILP32__
+# ifdef HAVE_MPX_SUPPORT
bndmov (LR_BND_OFFSET)(%rsp), %bnd0 # Restore bound
bndmov (LR_BND_OFFSET + BND_SIZE)(%rsp), %bnd1 # registers.
bndmov (LR_BND_OFFSET + BND_SIZE*2)(%rsp), %bnd2
bndmov (LR_BND_OFFSET + BND_SIZE*3)(%rsp), %bnd3
-# else
+# else
.byte 0x66,0x0f,0x1a,0x84,0x24;.long (LR_BND_OFFSET)
.byte 0x66,0x0f,0x1a,0x8c,0x24;.long (LR_BND_OFFSET + BND_SIZE)
.byte 0x66,0x0f,0x1a,0x94,0x24;.long (LR_BND_OFFSET + BND_SIZE*2)
.byte 0x66,0x0f,0x1a,0x9c,0x24;.long (LR_BND_OFFSET + BND_SIZE*3)
+# endif
# endif
-#endif
mov 16(%rbx), %R10_LP # Anything in framesize?
test %R10_LP, %R10_LP
@@ -168,12 +403,12 @@
movq LR_RSI_OFFSET(%rsp), %rsi
movq LR_RDI_OFFSET(%rsp), %rdi
- movq %rbx, %rsp
+ mov %RBX_LP, %RSP_LP
movq (%rsp), %rbx
- cfi_restore(rbx)
+ cfi_restore(%rbx)
cfi_def_cfa_register(%rsp)
- addq $48, %rsp # Adjust the stack to the return value
+ add $48, %RSP_LP # Adjust the stack to the return value
# (eats the reloc index and link_map)
cfi_adjust_cfa_offset(-48)
PRESERVE_BND_REGS_PREFIX
@@ -189,13 +424,13 @@
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
+ lea LR_RSP_OFFSET(%rbx), %RSI_LP # stack
+ add $8, %R10_LP
+ and $-16, %R10_LP
+ mov %R10_LP, %RCX_LP
+ sub %R10_LP, %RSP_LP
+ mov %RSP_LP, %RDI_LP
+ shr $3, %RCX_LP
rep
movsq
@@ -206,21 +441,21 @@
PRESERVE_BND_REGS_PREFIX
call *%r11
- mov 24(%rbx), %rsp # Drop the copied stack content
+ mov 24(%rbx), %RSP_LP # 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
+# 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.
+ sub $(LRV_SIZE + XMM_SIZE*2), %RSP_LP
+# else
+ sub $LRV_SIZE, %RSP_LP # sizeof(La_x86_64_retval)
+# endif
+ mov %RSP_LP, %RCX_LP # La_x86_64_retval argument to %rcx.
/* Fill in the La_x86_64_retval structure. */
movq %rax, LRV_RAX_OFFSET(%rcx)
@@ -229,26 +464,26 @@
movaps %xmm0, LRV_XMM0_OFFSET(%rcx)
movaps %xmm1, LRV_XMM1_OFFSET(%rcx)
-#ifdef RESTORE_AVX
+# ifdef RESTORE_AVX
/* This is to support AVX audit modules. */
- VMOV %VEC(0), LRV_VECTOR0_OFFSET(%rcx)
- VMOV %VEC(1), LRV_VECTOR1_OFFSET(%rcx)
+ VMOVA %VEC(0), LRV_VECTOR0_OFFSET(%rcx)
+ VMOVA %VEC(1), 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
+# endif
-#ifndef __ILP32__
-# ifdef HAVE_MPX_SUPPORT
+# ifndef __ILP32__
+# ifdef HAVE_MPX_SUPPORT
bndmov %bnd0, LRV_BND0_OFFSET(%rcx) # Preserve returned bounds.
bndmov %bnd1, LRV_BND1_OFFSET(%rcx)
-# else
+# else
.byte 0x66,0x0f,0x1b,0x81;.long (LRV_BND0_OFFSET)
.byte 0x66,0x0f,0x1b,0x89;.long (LRV_BND1_OFFSET)
+# endif
# endif
-#endif
fstpt LRV_ST0_OFFSET(%rcx)
fstpt LRV_ST1_OFFSET(%rcx)
@@ -265,50 +500,47 @@
movaps LRV_XMM0_OFFSET(%rsp), %xmm0
movaps LRV_XMM1_OFFSET(%rsp), %xmm1
-#ifdef RESTORE_AVX
+# ifdef RESTORE_AVX
/* Check if xmm0/xmm1 registers are changed by audit module. */
vpcmpeqq (LRV_SIZE)(%rsp), %xmm0, %xmm2
vpmovmskb %xmm2, %esi
cmpl $0xffff, %esi
jne 1f
- VMOV LRV_VECTOR0_OFFSET(%rsp), %VEC(0)
+ VMOVA LRV_VECTOR0_OFFSET(%rsp), %VEC(0)
1: vpcmpeqq (LRV_SIZE + XMM_SIZE)(%rsp), %xmm1, %xmm2
vpmovmskb %xmm2, %esi
cmpl $0xffff, %esi
jne 1f
- VMOV LRV_VECTOR1_OFFSET(%rsp), %VEC(1)
+ VMOVA LRV_VECTOR1_OFFSET(%rsp), %VEC(1)
1:
-#endif
+# endif
-#ifndef __ILP32__
-# ifdef HAVE_MPX_SUPPORT
+# ifndef __ILP32__
+# ifdef HAVE_MPX_SUPPORT
bndmov LRV_BND0_OFFSET(%rsp), %bnd0 # Restore bound registers.
bndmov LRV_BND1_OFFSET(%rsp), %bnd1
-# else
+# else
.byte 0x66,0x0f,0x1a,0x84,0x24;.long (LRV_BND0_OFFSET)
.byte 0x66,0x0f,0x1a,0x8c,0x24;.long (LRV_BND1_OFFSET)
+# endif
# endif
-#endif
fldt LRV_ST1_OFFSET(%rsp)
fldt LRV_ST0_OFFSET(%rsp)
- movq %rbx, %rsp
+ mov %RBX_LP, %RSP_LP
movq (%rsp), %rbx
- cfi_restore(rbx)
+ cfi_restore(%rbx)
cfi_def_cfa_register(%rsp)
- addq $48, %rsp # Adjust the stack to the return value
+ add $48, %RSP_LP # Adjust the stack to the return value
# (eats the reloc index and link_map)
cfi_adjust_cfa_offset(-48)
PRESERVE_BND_REGS_PREFIX
retq
-#ifdef MORE_CODE
- cfi_adjust_cfa_offset(48)
- cfi_rel_offset(%rbx, 0)
- cfi_def_cfa_register(%rbx)
-# undef MORE_CODE
+ cfi_endproc
+ .size _dl_runtime_profile, .-_dl_runtime_profile
#endif
diff --git a/sysdeps/x86_64/ifuncmain8.c b/sysdeps/x86_64/ifuncmain8.c
new file mode 100644
index 0000000..f75771d
--- /dev/null
+++ b/sysdeps/x86_64/ifuncmain8.c
@@ -0,0 +1,32 @@
+/* Test IFUNC selector with floating-point parameters.
+ Copyright (C) 2015 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <stdlib.h>
+
+extern float foo (float);
+
+static int
+do_test (void)
+{
+ if (foo (2) != 3)
+ abort ();
+ return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/sysdeps/x86_64/ifuncmod8.c b/sysdeps/x86_64/ifuncmod8.c
new file mode 100644
index 0000000..741aa13
--- /dev/null
+++ b/sysdeps/x86_64/ifuncmod8.c
@@ -0,0 +1,36 @@
+/* Test IFUNC selector with floating-point parameters.
+ Copyright (C) 2015 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <emmintrin.h>
+
+void * foo_ifunc (void) __asm__ ("foo");
+__asm__(".type foo, %gnu_indirect_function");
+
+static float
+foo_impl (float x)
+{
+ return x + 1;
+}
+
+void *
+foo_ifunc (void)
+{
+ __m128i xmm = _mm_set1_epi32 (-1);
+ asm volatile ("movdqa %0, %%xmm0" : : "x" (xmm) : "xmm0" );
+ return foo_impl;
+}
diff --git a/sysdeps/x86_64/nptl/tcb-offsets.sym b/sysdeps/x86_64/nptl/tcb-offsets.sym
index 729d1da..aeb7526 100644
--- a/sysdeps/x86_64/nptl/tcb-offsets.sym
+++ b/sysdeps/x86_64/nptl/tcb-offsets.sym
@@ -16,7 +16,6 @@ VGETCPU_CACHE_OFFSET offsetof (tcbhead_t, vgetcpu_cache)
#ifndef __ASSUME_PRIVATE_FUTEX
PRIVATE_FUTEX offsetof (tcbhead_t, private_futex)
#endif
-RTLD_SAVESPACE_SSE offsetof (tcbhead_t, rtld_savespace_sse)
-- Not strictly offsets, but these values are also used in the TCB.
TCB_CANCELSTATE_BITMASK CANCELSTATE_BITMASK
diff --git a/sysdeps/x86_64/nptl/tls.h b/sysdeps/x86_64/nptl/tls.h
index d7543c6..b73e7ed 100644
--- a/sysdeps/x86_64/nptl/tls.h
+++ b/sysdeps/x86_64/nptl/tls.h
@@ -67,14 +67,15 @@ typedef struct
# else
int __glibc_reserved1;
# endif
- int rtld_must_xmm_save;
+ int __glibc_unused1;
/* Reservation of some values for the TM ABI. */
void *__private_tm[4];
/* GCC split stack support. */
void *__private_ss;
long int __glibc_reserved2;
- /* Have space for the post-AVX register size. */
- __128bits rtld_savespace_sse[8][4] __attribute__ ((aligned (32)));
+ /* Must be kept even if it is no longer used by glibc since programs,
+ like AddressSanitizer, depend on the size of tcbhead_t. */
+ __128bits __glibc_unused2[8][4] __attribute__ ((aligned (32)));
void *__padding[8];
} tcbhead_t;
@@ -384,41 +385,6 @@ typedef struct
# define THREAD_GSCOPE_WAIT() \
GL(dl_wait_lookup_done) ()
-
-# ifdef SHARED
-/* Defined in dl-trampoline.S. */
-extern void _dl_x86_64_save_sse (void);
-extern void _dl_x86_64_restore_sse (void);
-
-# define RTLD_CHECK_FOREIGN_CALL \
- (THREAD_GETMEM (THREAD_SELF, header.rtld_must_xmm_save) != 0)
-
-/* NB: Don't use the xchg operation because that would imply a lock
- prefix which is expensive and unnecessary. The cache line is also
- not contested at all. */
-# define RTLD_ENABLE_FOREIGN_CALL \
- int old_rtld_must_xmm_save = THREAD_GETMEM (THREAD_SELF, \
- header.rtld_must_xmm_save); \
- THREAD_SETMEM (THREAD_SELF, header.rtld_must_xmm_save, 1)
-
-# define RTLD_PREPARE_FOREIGN_CALL \
- do if (THREAD_GETMEM (THREAD_SELF, header.rtld_must_xmm_save)) \
- { \
- _dl_x86_64_save_sse (); \
- THREAD_SETMEM (THREAD_SELF, header.rtld_must_xmm_save, 0); \
- } \
- while (0)
-
-# define RTLD_FINALIZE_FOREIGN_CALL \
- do { \
- if (THREAD_GETMEM (THREAD_SELF, header.rtld_must_xmm_save) == 0) \
- _dl_x86_64_restore_sse (); \
- THREAD_SETMEM (THREAD_SELF, header.rtld_must_xmm_save, \
- old_rtld_must_xmm_save); \
- } while (0)
-# endif
-
-
#endif /* __ASSEMBLER__ */
#endif /* tls.h */
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 27 ++
sysdeps/x86_64/Makefile | 5 +
sysdeps/x86_64/dl-machine.h | 29 +-
sysdeps/x86_64/dl-trampoline.S | 462 +++----------------
sysdeps/x86_64/dl-trampoline.h | 366 +++++++++++++---
.../tst-get-cpu-features.c => x86_64/ifuncmain8.c} | 9 +-
.../power5+/fpu/s_ceilf.S => x86_64/ifuncmod8.c} | 27 +-
sysdeps/x86_64/nptl/tcb-offsets.sym | 1 -
sysdeps/x86_64/nptl/tls.h | 42 +--
9 files changed, 453 insertions(+), 515 deletions(-)
copy sysdeps/{x86/tst-get-cpu-features.c => x86_64/ifuncmain8.c} (84%)
copy sysdeps/{powerpc/powerpc32/power5+/fpu/s_ceilf.S => x86_64/ifuncmod8.c} (69%)
hooks/post-receive
--
GNU C Library master sources