diff options
Diffstat (limited to 'sysdeps/x86_64/dl-trampoline.S')
| -rw-r--r-- | sysdeps/x86_64/dl-trampoline.S | 179 |
1 files changed, 55 insertions, 124 deletions
diff --git a/sysdeps/x86_64/dl-trampoline.S b/sysdeps/x86_64/dl-trampoline.S index 33e6115f7b..f605351f30 100644 --- a/sysdeps/x86_64/dl-trampoline.S +++ b/sysdeps/x86_64/dl-trampoline.S @@ -17,7 +17,9 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ +#include <config.h> #include <sysdep.h> +#include <link-defines.h> .text .globl _dl_runtime_resolve @@ -89,135 +91,64 @@ _dl_runtime_profile: /* Actively align the La_x86_64_regs structure. */ andq $0xfffffffffffffff0, %rsp - subq $192, %rsp # sizeof(La_x86_64_regs) +# ifdef HAVE_AVX_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) - movq %rdx, (%rsp) # Fill the La_x86_64_regs structure. - movq %r8, 8(%rsp) - movq %r9, 16(%rsp) - movq %rcx, 24(%rsp) - movq %rsi, 32(%rsp) - movq %rdi, 40(%rsp) - movq %rbp, 48(%rsp) - leaq 48(%rbx), %rax - movq %rax, 56(%rsp) - movaps %xmm0, 64(%rsp) - movaps %xmm1, 80(%rsp) - movaps %xmm2, 96(%rsp) - movaps %xmm3, 112(%rsp) - movaps %xmm4, 128(%rsp) - movaps %xmm5, 144(%rsp) - movaps %xmm6, 160(%rsp) - movaps %xmm7, 176(%rsp) - - movq %rsp, %rcx # La_x86_64_regs pointer to %rcx. - movq 48(%rbx), %rdx # Load return address if needed. - movq 40(%rbx), %rsi # Copy args pushed by PLT in register. - movq 32(%rbx), %rdi # %rdi: link_map, %rsi: reloc_index - leaq 16(%rbx), %r8 - call _dl_profile_fixup # Call resolver. - - movq %rax, %r11 # Save return value. - - movq 8(%rbx), %rax # Get back register content. - movq (%rsp), %rdx - movq 8(%rsp), %r8 - movq 16(%rsp), %r9 - movaps 64(%rsp), %xmm0 - movaps 80(%rsp), %xmm1 - movaps 96(%rsp), %xmm2 - movaps 112(%rsp), %xmm3 - movaps 128(%rsp), %xmm4 - movaps 144(%rsp), %xmm5 - movaps 160(%rsp), %xmm6 - movaps 176(%rsp), %xmm7 - - movq 16(%rbx), %r10 # Anything in framesize? - testq %r10, %r10 - jns 1f - - /* There's nothing in the frame size, so there - will be no call to the _dl_call_pltexit. */ - - movq 24(%rsp), %rcx # Get back registers content. - movq 32(%rsp), %rsi - movq 40(%rsp), %rdi - - movq %rbx, %rsp - movq (%rsp), %rbx - cfi_restore(rbx) - cfi_def_cfa_register(%rsp) - - addq $48, %rsp # Adjust the stack to the return value - # (eats the reloc index and link_map) - cfi_adjust_cfa_offset(-48) - jmp *%r11 # Jump to function address. + /* 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) -1: - cfi_adjust_cfa_offset(48) - cfi_rel_offset(%rbx, 0) - cfi_def_cfa_register(%rbx) +# ifdef HAVE_AVX_SUPPORT + jmp *L(save_and_restore_vector)(%rip) - /* At this point we need to prepare new stack for the function - which has to be called. We copy the original stack to a - temporary buffer of the size specified by the 'framesize' - returned from _dl_profile_fixup */ - - leaq 56(%rbx), %rsi # stack - addq $8, %r10 - andq $0xfffffffffffffff0, %r10 - movq %r10, %rcx - subq %r10, %rsp - movq %rsp, %rdi - shrq $3, %rcx - rep - movsq - - movq 24(%rdi), %rcx # Get back register content. - movq 32(%rdi), %rsi - movq 40(%rdi), %rdi - - call *%r11 - - mov 24(%rbx), %rsp # 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. */ - - subq $80, %rsp # sizeof(La_x86_64_retval) - movq %rsp, %rcx # La_x86_64_retval argument to %rcx. - - movq %rax, (%rcx) # Fill in the La_x86_64_retval structure. - movq %rdx, 8(%rcx) - movaps %xmm0, 16(%rcx) - movaps %xmm1, 32(%rcx) - fstpt 48(%rcx) - fstpt 64(%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 - call _dl_call_pltexit - - movq (%rsp), %rax # Restore return registers. - movq 8(%rsp), %rdx - movaps 16(%rsp), %xmm0 - movaps 32(%rsp), %xmm1 - fldt 64(%rsp) - fldt 48(%rsp) - - movq %rbx, %rsp - movq (%rsp), %rbx - cfi_restore(rbx) - cfi_def_cfa_register(%rsp) - - addq $48, %rsp # Adjust the stack to the return value - # (eats the reloc index and link_map) - cfi_adjust_cfa_offset(-48) - retq + .align 16 +L(save_and_restore_vector_sse): +# endif + +# define MOVXMM movaps +# include "dl-trampoline.h" + +# ifdef HAVE_AVX_SUPPORT +# undef MOVXMM +# define MOVXMM vmovdqa +# define RESTORE_AVX + .align 16 +L(save_and_restore_vector_avx): +# include "dl-trampoline.h" +# endif cfi_endproc .size _dl_runtime_profile, .-_dl_runtime_profile + +# ifdef HAVE_AVX_SUPPORT +L(check_avx): + mov %rbx,%r11 # Save rbx + movl $1, %eax + cpuid + mov %r11,%rbx # Restore rbx + leaq L(save_and_restore_vector_sse)(%rip), %rax + andl $(1 << 28), %ecx # Check if AVX is available. + jz L(ret) + leaq L(save_and_restore_vector_avx)(%rip), %rax +L(ret): + movq %rax,L(save_and_restore_vector)(%rip) + jmp *%rax + + .section .data.rel.local,"aw",@progbits + .align 8 +L(save_and_restore_vector): + .quad L(check_avx) +# endif #endif |