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| 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.h | |
| parent | 3c799e913168a84197c08e62d47be666329308e0 (diff) | |
| download | glibc-ea8ba7cd14d0f479bae8365ae5c4ef177bdd0aad.tar.gz glibc-ea8ba7cd14d0f479bae8365ae5c4ef177bdd0aad.tar.xz glibc-ea8ba7cd14d0f479bae8365ae5c4ef177bdd0aad.zip | |
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.h')
| -rw-r--r-- | sysdeps/x86_64/dl-trampoline.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/sysdeps/x86_64/dl-trampoline.h b/sysdeps/x86_64/dl-trampoline.h index 161af0ff57..416ed0e89c 100644 --- a/sysdeps/x86_64/dl-trampoline.h +++ b/sysdeps/x86_64/dl-trampoline.h @@ -63,6 +63,20 @@ movaps (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp), %xmm6 movaps (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp), %xmm7 +#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 + .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 + #ifdef RESTORE_AVX /* Check if any xmm0-xmm7 registers are changed by audit module. */ @@ -222,6 +236,16 @@ vmovdqa %xmm1, (LRV_SIZE + XMM_SIZE)(%rcx) #endif +#ifndef __ILP32__ +# ifdef HAVE_MPX_SUPPORT + bndmov %bnd0, LRV_BND0_OFFSET(%rcx) # Preserve returned bounds. + bndmov %bnd1, LRV_BND1_OFFSET(%rcx) +# else + .byte 0x66,0x0f,0x1b,0x81;.long (LRV_BND0_OFFSET) + .byte 0x66,0x0f,0x1b,0x89;.long (LRV_BND1_OFFSET) +# endif +#endif + fstpt LRV_ST0_OFFSET(%rcx) fstpt LRV_ST1_OFFSET(%rcx) @@ -254,6 +278,16 @@ 1: #endif +#ifndef __ILP32__ +# ifdef HAVE_MPX_SUPPORT + bndmov LRV_BND0_OFFSET(%rcx), %bnd0 # Restore bound registers. + bndmov LRV_BND1_OFFSET(%rcx), %bnd1 +# else + .byte 0x66,0x0f,0x1a,0x81;.long (LRV_BND0_OFFSET) + .byte 0x66,0x0f,0x1a,0x89;.long (LRV_BND1_OFFSET) +# endif +#endif + fldt LRV_ST1_OFFSET(%rsp) fldt LRV_ST0_OFFSET(%rsp) |