193 lines
4.9 KiB
ArmAsm
193 lines
4.9 KiB
ArmAsm
/* PLT trampolines. x86-64 version.
|
|
Copyright (C) 2004, 2005, 2007 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 <sysdep.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 %rsi, %r11 # Multiply by 24
|
|
addq %r11, %rsi
|
|
addq %r11, %rsi
|
|
shlq $3, %rsi
|
|
movq 56(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset
|
|
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:
|
|
subq $88, %rsp
|
|
cfi_adjust_cfa_offset(104) # Incorporate PLT
|
|
movq %rax, (%rsp) # Preserve registers otherwise clobbered.
|
|
movq %rdx, 8(%rsp)
|
|
movq %r8, 16(%rsp)
|
|
movq %r9, 24(%rsp)
|
|
movq %rcx, 32(%rsp)
|
|
movq %rsi, 40(%rsp)
|
|
movq %rdi, 48(%rsp)
|
|
movq %rbp, 56(%rsp) # Information for auditors.
|
|
leaq 104(%rsp), %rax
|
|
movq %rax, 64(%rsp)
|
|
leaq 8(%rsp), %rcx
|
|
movq 104(%rsp), %rdx # Load return address if needed
|
|
movq 96(%rsp), %rsi # Copy args pushed by PLT in register.
|
|
movq %rsi,%r11 # Multiply by 24
|
|
addq %r11,%rsi
|
|
addq %r11,%rsi
|
|
shlq $3, %rsi
|
|
movq 88(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset
|
|
leaq 72(%rsp), %r8
|
|
call _dl_profile_fixup # Call resolver.
|
|
movq %rax, %r11 # Save return value
|
|
movq 8(%rsp), %rdx # Get back register content.
|
|
movq 16(%rsp), %r8
|
|
movq 24(%rsp), %r9
|
|
movq (%rsp),%rax
|
|
movq 72(%rsp), %r10
|
|
testq %r10, %r10
|
|
jns 1f
|
|
movq 32(%rsp), %rcx
|
|
movq 40(%rsp), %rsi
|
|
movq 48(%rsp), %rdi
|
|
addq $104,%rsp # Adjust stack
|
|
cfi_adjust_cfa_offset (-104)
|
|
jmp *%r11 # Jump to function address.
|
|
|
|
/*
|
|
+104 return address
|
|
+96 PLT2
|
|
+88 PLT1
|
|
+80 free
|
|
+72 free
|
|
+64 %rsp
|
|
+56 %rbp
|
|
+48 %rdi
|
|
+40 %rsi
|
|
+32 %rcx
|
|
+24 %r9
|
|
+16 %r8
|
|
+8 %rdx
|
|
%rsp %rax
|
|
*/
|
|
cfi_adjust_cfa_offset (104)
|
|
1: movq %rbx, 72(%rsp)
|
|
cfi_rel_offset (rbx, 72)
|
|
leaq 112(%rsp), %rsi
|
|
movq %rsp, %rbx
|
|
cfi_def_cfa_register (%rbx)
|
|
movq %r10, %rcx
|
|
addq $8, %r10
|
|
andq $0xfffffffffffffff0, %r10
|
|
subq %r10, %rsp
|
|
movq %rsp, %rdi
|
|
shrq $3, %rcx
|
|
rep
|
|
movsq
|
|
movq 32(%rbx), %rcx
|
|
movq 40(%rbx), %rsi
|
|
movq 48(%rbx), %rdi
|
|
call *%r11
|
|
movq %rbx, %rsp
|
|
cfi_def_cfa_register (%rsp)
|
|
subq $72, %rsp
|
|
cfi_adjust_cfa_offset (72)
|
|
movq %rsp, %rcx
|
|
movq %rax, (%rcx)
|
|
movq %rdx, 8(%rcx)
|
|
/* Even though the stack is correctly aligned to allow using movaps
|
|
we use movups. Some callers might provide an incorrectly aligned
|
|
stack and we do not want to have it blow up here. */
|
|
movups %xmm0, 16(%rcx)
|
|
movups %xmm1, 32(%rcx)
|
|
fstpt 48(%rcx)
|
|
fstpt 64(%rcx)
|
|
/*
|
|
+176 return address
|
|
+168 PLT2
|
|
+160 PLT1
|
|
+152 free
|
|
+144 free
|
|
+136 %rsp
|
|
+128 %rbp
|
|
+120 %rdi
|
|
+112 %rsi
|
|
+104 %rcx
|
|
+96 %r9
|
|
+88 %r8
|
|
+80 %rdx
|
|
+64 %st1 result
|
|
+48 %st result
|
|
+32 %xmm1 result
|
|
+16 %xmm0 result
|
|
+8 %rdx result
|
|
%rsp %rax result
|
|
*/
|
|
leaq 80(%rsp), %rdx
|
|
movq 144(%rsp), %rbx
|
|
cfi_restore (rbx)
|
|
movq 168(%rsp), %rsi # Copy args pushed by PLT in register.
|
|
movq %rsi,%r11 # Multiply by 24
|
|
addq %r11,%rsi
|
|
addq %r11,%rsi
|
|
shlq $3, %rsi
|
|
movq 160(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset
|
|
call _dl_call_pltexit
|
|
movq (%rsp), %rax
|
|
movq 8(%rsp), %rdx
|
|
movups 16(%rsp), %xmm0
|
|
movups 32(%rsp), %xmm1
|
|
fldt 64(%rsp)
|
|
fldt 48(%rsp)
|
|
addq $176, %rsp
|
|
cfi_adjust_cfa_offset (-176)
|
|
retq
|
|
cfi_endproc
|
|
.size _dl_runtime_profile, .-_dl_runtime_profile
|
|
#endif
|