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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 | |
| parent | 3c799e913168a84197c08e62d47be666329308e0 (diff) | |
| download | glibc-ea8ba7cd14d0f479bae8365ae5c4ef177bdd0aad.tar glibc-ea8ba7cd14d0f479bae8365ae5c4ef177bdd0aad.tar.gz glibc-ea8ba7cd14d0f479bae8365ae5c4ef177bdd0aad.tar.bz2 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')
| -rw-r--r-- | sysdeps/x86_64/dl-trampoline.S | 14 | ||||
| -rw-r--r-- | sysdeps/x86_64/dl-trampoline.h | 34 | ||||
| -rw-r--r-- | sysdeps/x86_64/link-defines.sym | 8 |
3 files changed, 56 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): 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) diff --git a/sysdeps/x86_64/link-defines.sym b/sysdeps/x86_64/link-defines.sym index 85d35ad034..862fa22024 100644 --- a/sysdeps/x86_64/link-defines.sym +++ b/sysdeps/x86_64/link-defines.sym @@ -6,6 +6,7 @@ VECTOR_SIZE sizeof (La_x86_64_vector) XMM_SIZE sizeof (La_x86_64_xmm) YMM_SIZE sizeof (La_x86_64_ymm) ZMM_SIZE sizeof (La_x86_64_zmm) +BND_SIZE sizeof (__int128) LR_SIZE sizeof (struct La_x86_64_regs) LR_RDX_OFFSET offsetof (struct La_x86_64_regs, lr_rdx) @@ -18,6 +19,9 @@ LR_RBP_OFFSET offsetof (struct La_x86_64_regs, lr_rbp) LR_RSP_OFFSET offsetof (struct La_x86_64_regs, lr_rsp) LR_XMM_OFFSET offsetof (struct La_x86_64_regs, lr_xmm) LR_VECTOR_OFFSET offsetof (struct La_x86_64_regs, lr_vector) +#ifndef __ILP32__ +LR_BND_OFFSET offsetof (struct La_x86_64_regs, lr_bnd) +#endif LRV_SIZE sizeof (struct La_x86_64_retval) LRV_RAX_OFFSET offsetof (struct La_x86_64_retval, lrv_rax) @@ -28,3 +32,7 @@ LRV_ST0_OFFSET offsetof (struct La_x86_64_retval, lrv_st0) LRV_ST1_OFFSET offsetof (struct La_x86_64_retval, lrv_st1) LRV_VECTOR0_OFFSET offsetof (struct La_x86_64_retval, lrv_vector0) LRV_VECTOR1_OFFSET offsetof (struct La_x86_64_retval, lrv_vector1) +#ifndef __ILP32__ +LRV_BND0_OFFSET offsetof (struct La_x86_64_retval, lrv_bnd0) +LRV_BND1_OFFSET offsetof (struct La_x86_64_retval, lrv_bnd1) +#endif |