diff options
| author | Igor Zamyatin <igor.zamyatin@intel.com> | 2014-04-16 14:43:16 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2014-04-16 14:46:49 -0700 |
| commit | ea8ba7cd14d0f479bae8365ae5c4ef177bdd0aad (patch) | |
| tree | aa6c46df56a9ac7567b3bcfa3db37f55ac7b3775 /sysdeps/x86_64/dl-trampoline.S | |
| parent | 3c799e913168a84197c08e62d47be666329308e0 (diff) | |
Save/restore bound registers for _dl_runtime_profile
This patch saves and restores bound registers in x86-64 PLT for
ld.so profile and LD_AUDIT:
* sysdeps/x86_64/bits/link.h (La_x86_64_regs): Add lr_bnd.
(La_x86_64_retval): Add lrv_bnd0 and lrv_bnd1.
* sysdeps/x86_64/dl-trampoline.S (_dl_runtime_profile): Save
Intel MPX bound registers before _dl_profile_fixup.
* sysdeps/x86_64/dl-trampoline.h: Restore Intel MPX bound
registers after _dl_profile_fixup. Save and restore bound
registers bnd0/bnd1 when calling _dl_call_pltexit.
* sysdeps/x86_64/link-defines.sym (BND_SIZE): New.
(LR_BND_OFFSET): Likewise.
(LRV_BND0_OFFSET): Likewise.
(LRV_BND1_OFFSET): Likewise.
Diffstat (limited to 'sysdeps/x86_64/dl-trampoline.S')
| -rw-r--r-- | sysdeps/x86_64/dl-trampoline.S | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sysdeps/x86_64/dl-trampoline.S b/sysdeps/x86_64/dl-trampoline.S index 3c0f54274a..bf3cff7b86 100644 --- a/sysdeps/x86_64/dl-trampoline.S +++ b/sysdeps/x86_64/dl-trampoline.S @@ -189,6 +189,20 @@ _dl_runtime_profile: 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,0x84,0x24;.long (LR_BND_OFFSET + BND_SIZE*2) + .byte 0x66,0x0f,0x1b,0x8c,0x24;.long (LR_BND_OFFSET + BND_SIZE*3) +# endif +# endif + # if defined HAVE_AVX_SUPPORT || defined HAVE_AVX512_ASM_SUPPORT .data L(have_avx): |