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/* 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:
/* 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(48) # Incorporate PLT
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)
# ifdef HAVE_AVX_SUPPORT
jmp *L(save_and_restore_vector)(%rip)
.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
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