| /* PLT trampolines. x86-64 version. |
| Copyright (C) 2004, 2005, 2007, 2009 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 |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| 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 |
| .type _dl_runtime_resolve, @function |
| .align 16 |
| cfi_startproc |
| _dl_runtime_resolve: |
| subq $56,%rsp |
| cfi_adjust_cfa_offset(72) # Incorporate PLT |
| movq %rax,(%rsp) # Preserve registers otherwise clobbered. |
| movq %rcx, 8(%rsp) |
| movq %rdx, 16(%rsp) |
| movq %rsi, 24(%rsp) |
| movq %rdi, 32(%rsp) |
| movq %r8, 40(%rsp) |
| movq %r9, 48(%rsp) |
| movq 64(%rsp), %rsi # Copy args pushed by PLT in register. |
| movq 56(%rsp), %rdi # %rdi: link_map, %rsi: reloc_index |
| call _dl_fixup # Call resolver. |
| movq %rax, %r11 # Save return value |
| movq 48(%rsp), %r9 # Get register content back. |
| movq 40(%rsp), %r8 |
| movq 32(%rsp), %rdi |
| movq 24(%rsp), %rsi |
| movq 16(%rsp), %rdx |
| movq 8(%rsp), %rcx |
| movq (%rsp), %rax |
| addq $72, %rsp # Adjust stack(PLT did 2 pushes) |
| cfi_adjust_cfa_offset(-72) |
| jmp *%r11 # Jump to function address. |
| cfi_endproc |
| .size _dl_runtime_resolve, .-_dl_runtime_resolve |
| |
| |
| #ifndef PROF |
| .globl _dl_runtime_profile |
| .type _dl_runtime_profile, @function |
| .align 16 |
| cfi_startproc |
| |
| _dl_runtime_profile: |
| cfi_adjust_cfa_offset(16) # Incorporate PLT |
| /* The La_x86_64_regs data structure pointed to by the |
| fourth paramater must be 16-byte aligned. This must |
| be explicitly enforced. We have the set up a dynamically |
| sized stack frame. %rbx points to the top half which |
| has a fixed size and preserves the original stack pointer. */ |
| |
| subq $32, %rsp # Allocate the local storage. |
| cfi_adjust_cfa_offset(32) |
| movq %rbx, (%rsp) |
| cfi_rel_offset(%rbx, 0) |
| |
| /* On the stack: |
| 56(%rbx) parameter #1 |
| 48(%rbx) return address |
| |
| 40(%rbx) reloc index |
| 32(%rbx) link_map |
| |
| 24(%rbx) La_x86_64_regs pointer |
| 16(%rbx) framesize |
| 8(%rbx) rax |
| (%rbx) rbx |
| */ |
| |
| movq %rax, 8(%rsp) |
| movq %rsp, %rbx |
| cfi_def_cfa_register(%rbx) |
| |
| /* Actively align the La_x86_64_regs structure. */ |
| andq $0xfffffffffffffff0, %rsp |
| # 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) |
| |
| /* 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) |
| |
| leaq 48(%rbx), %rax |
| movq %rax, LR_RSP_OFFSET(%rsp) |
| |
| /* We always store the XMM registers even if AVX is available. |
| This is to provide backward binary compatility for existing |
| audit modules. */ |
| movaps %xmm0, (LR_XMM_OFFSET)(%rsp) |
| movaps %xmm1, (LR_XMM_OFFSET + XMM_SIZE)(%rsp) |
| movaps %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp) |
| movaps %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp) |
| movaps %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp) |
| movaps %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp) |
| movaps %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp) |
| movaps %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp) |
| |
| # ifdef HAVE_AVX_SUPPORT |
| .data |
| L(have_avx): |
| .zero 4 |
| .size L(have_avx), 4 |
| .previous |
| |
| cmpl $0, L(have_avx)(%rip) |
| jne 1f |
| movq %rbx, %r11 # Save rbx |
| movl $1, %eax |
| cpuid |
| movq %r11,%rbx # Restore rbx |
| movl $1, %eax |
| testl $(1 << 28), %ecx |
| jne 2f |
| negl %eax |
| 2: movl %eax, L(have_avx)(%rip) |
| cmpl $0, %eax |
| |
| 1: js L(no_avx) |
| |
| # define RESTORE_AVX |
| # include "dl-trampoline.h" |
| |
| .align 16 |
| L(no_avx): |
| # endif |
| |
| # undef RESTORE_AVX |
| # include "dl-trampoline.h" |
| |
| cfi_endproc |
| .size _dl_runtime_profile, .-_dl_runtime_profile |
| #endif |
| |
| |
| #ifdef SHARED |
| .globl _dl_x86_64_save_sse |
| .type _dl_x86_64_save_sse, @function |
| .align 16 |
| cfi_startproc |
| _dl_x86_64_save_sse: |
| # ifdef HAVE_AVX_SUPPORT |
| cmpl $0, L(have_avx)(%rip) |
| jne 1f |
| movq %rbx, %r11 # Save rbx |
| movl $1, %eax |
| cpuid |
| movq %r11,%rbx # Restore rbx |
| movl $1, %eax |
| testl $(1 << 28), %ecx |
| jne 2f |
| negl %eax |
| 2: movl %eax, L(have_avx)(%rip) |
| cmpl $0, %eax |
| |
| 1: js L(no_avx5) |
| |
| # define YMM_SIZE 32 |
| vmovdqa %ymm0, %fs:RTLD_SAVESPACE_SSE+0*YMM_SIZE |
| vmovdqa %ymm1, %fs:RTLD_SAVESPACE_SSE+1*YMM_SIZE |
| vmovdqa %ymm2, %fs:RTLD_SAVESPACE_SSE+2*YMM_SIZE |
| vmovdqa %ymm3, %fs:RTLD_SAVESPACE_SSE+3*YMM_SIZE |
| vmovdqa %ymm4, %fs:RTLD_SAVESPACE_SSE+4*YMM_SIZE |
| vmovdqa %ymm5, %fs:RTLD_SAVESPACE_SSE+5*YMM_SIZE |
| vmovdqa %ymm6, %fs:RTLD_SAVESPACE_SSE+6*YMM_SIZE |
| vmovdqa %ymm7, %fs:RTLD_SAVESPACE_SSE+7*YMM_SIZE |
| ret |
| L(no_avx5): |
| # endif |
| movdqa %xmm0, %fs:RTLD_SAVESPACE_SSE+0*XMM_SIZE |
| movdqa %xmm1, %fs:RTLD_SAVESPACE_SSE+1*XMM_SIZE |
| movdqa %xmm2, %fs:RTLD_SAVESPACE_SSE+2*XMM_SIZE |
| movdqa %xmm3, %fs:RTLD_SAVESPACE_SSE+3*XMM_SIZE |
| movdqa %xmm4, %fs:RTLD_SAVESPACE_SSE+4*XMM_SIZE |
| movdqa %xmm5, %fs:RTLD_SAVESPACE_SSE+5*XMM_SIZE |
| movdqa %xmm6, %fs:RTLD_SAVESPACE_SSE+6*XMM_SIZE |
| movdqa %xmm7, %fs:RTLD_SAVESPACE_SSE+7*XMM_SIZE |
| ret |
| cfi_endproc |
| .size _dl_x86_64_save_sse, .-_dl_x86_64_save_sse |
| |
| |
| .globl _dl_x86_64_restore_sse |
| .type _dl_x86_64_restore_sse, @function |
| .align 16 |
| cfi_startproc |
| _dl_x86_64_restore_sse: |
| # ifdef HAVE_AVX_SUPPORT |
| cmpl $0, L(have_avx)(%rip) |
| js L(no_avx6) |
| |
| vmovdqa %fs:RTLD_SAVESPACE_SSE+0*YMM_SIZE, %ymm0 |
| vmovdqa %fs:RTLD_SAVESPACE_SSE+1*YMM_SIZE, %ymm1 |
| vmovdqa %fs:RTLD_SAVESPACE_SSE+2*YMM_SIZE, %ymm2 |
| vmovdqa %fs:RTLD_SAVESPACE_SSE+3*YMM_SIZE, %ymm3 |
| vmovdqa %fs:RTLD_SAVESPACE_SSE+4*YMM_SIZE, %ymm4 |
| vmovdqa %fs:RTLD_SAVESPACE_SSE+5*YMM_SIZE, %ymm5 |
| vmovdqa %fs:RTLD_SAVESPACE_SSE+6*YMM_SIZE, %ymm6 |
| vmovdqa %fs:RTLD_SAVESPACE_SSE+7*YMM_SIZE, %ymm7 |
| ret |
| L(no_avx6): |
| # endif |
| movdqa %fs:RTLD_SAVESPACE_SSE+0*XMM_SIZE, %xmm0 |
| movdqa %fs:RTLD_SAVESPACE_SSE+1*XMM_SIZE, %xmm1 |
| movdqa %fs:RTLD_SAVESPACE_SSE+2*XMM_SIZE, %xmm2 |
| movdqa %fs:RTLD_SAVESPACE_SSE+3*XMM_SIZE, %xmm3 |
| movdqa %fs:RTLD_SAVESPACE_SSE+4*XMM_SIZE, %xmm4 |
| movdqa %fs:RTLD_SAVESPACE_SSE+5*XMM_SIZE, %xmm5 |
| movdqa %fs:RTLD_SAVESPACE_SSE+6*XMM_SIZE, %xmm6 |
| movdqa %fs:RTLD_SAVESPACE_SSE+7*XMM_SIZE, %xmm7 |
| ret |
| cfi_endproc |
| .size _dl_x86_64_restore_sse, .-_dl_x86_64_restore_sse |
| #endif |
