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authorUlrich Drepper <drepper@gmail.com>2011-08-20 08:56:30 -0400
committerUlrich Drepper <drepper@gmail.com>2011-08-20 08:56:30 -0400
commitc88f17668b67d22fe470933ab81119de587ee175 (patch)
tree1ee6f9aa04c7d3e231ef6be780beb73ecdf76c48 /sysdeps
parent94d7165ffa21944a5c301144d9f884cfe24199ab (diff)
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Fix CFI info in x86-64 trampolines for non-AVX code
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/x86_64/dl-trampoline.S5
-rw-r--r--sysdeps/x86_64/dl-trampoline.h25
2 files changed, 19 insertions, 11 deletions
diff --git a/sysdeps/x86_64/dl-trampoline.S b/sysdeps/x86_64/dl-trampoline.S
index 45a2dc2..317610c 100644
--- a/sysdeps/x86_64/dl-trampoline.S
+++ b/sysdeps/x86_64/dl-trampoline.S
@@ -158,14 +158,15 @@ L(have_avx):
1: js L(no_avx)
# define RESTORE_AVX
+# define MORE_CODE
# include "dl-trampoline.h"
.align 16
L(no_avx):
# endif
-# undef RESTORE_AVX
-# include "dl-trampoline.h"
+# undef RESTORE_AVX
+# include "dl-trampoline.h"
cfi_endproc
.size _dl_runtime_profile, .-_dl_runtime_profile
diff --git a/sysdeps/x86_64/dl-trampoline.h b/sysdeps/x86_64/dl-trampoline.h
index 5d49ed4..1c39579 100644
--- a/sysdeps/x86_64/dl-trampoline.h
+++ b/sysdeps/x86_64/dl-trampoline.h
@@ -1,6 +1,6 @@
/* Partial PLT profile trampoline to save and restore x86-64 vector
registers.
- Copyright (C) 2009 Free Software Foundation, Inc.
+ Copyright (C) 2009, 2011 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
@@ -195,14 +195,14 @@
_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
+#else
subq $LRV_SIZE, %rsp # sizeof(La_x86_64_retval)
-# endif
+#endif
movq %rsp, %rcx # La_x86_64_retval argument to %rcx.
/* Fill in the La_x86_64_retval structure. */
@@ -212,7 +212,7 @@
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. */
vmovdqu %ymm0, LRV_VECTOR0_OFFSET(%rcx)
vmovdqu %ymm1, LRV_VECTOR1_OFFSET(%rcx)
@@ -221,14 +221,14 @@
by audit module. */
vmovdqa %xmm0, (LRV_SIZE)(%rcx)
vmovdqa %xmm1, (LRV_SIZE + XMM_SIZE)(%rcx)
-# endif
+#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
+ movq 32(%rbx), %rdi # %rdi: link_map, %rsi: reloc_index
call _dl_call_pltexit
/* Restore return registers. */
@@ -238,7 +238,7 @@
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
@@ -253,7 +253,7 @@
vmovdqu LRV_VECTOR1_OFFSET(%rsp), %ymm1
1:
-# endif
+#endif
fldt LRV_ST1_OFFSET(%rsp)
fldt LRV_ST0_OFFSET(%rsp)
@@ -267,3 +267,10 @@
# (eats the reloc index and link_map)
cfi_adjust_cfa_offset(-48)
retq
+
+#ifdef MORE_CODE
+ cfi_adjust_cfa_offset(48)
+ cfi_rel_offset(%rbx, 0)
+ cfi_def_cfa_register(%rbx)
+# undef MORE_CODE
+#endif