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191 lines
4.9 KiB
ArmAsm
191 lines
4.9 KiB
ArmAsm
/* PLT trampolines. x86-64 version.
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Copyright (C) 2004, 2005, 2007 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdep.h>
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.text
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.globl _dl_runtime_resolve
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.type _dl_runtime_resolve, @function
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.align 16
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cfi_startproc
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_dl_runtime_resolve:
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subq $56,%rsp
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cfi_adjust_cfa_offset(72) # Incorporate PLT
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movq %rax,(%rsp) # Preserve registers otherwise clobbered.
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movq %rcx, 8(%rsp)
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movq %rdx, 16(%rsp)
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movq %rsi, 24(%rsp)
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movq %rdi, 32(%rsp)
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movq %r8, 40(%rsp)
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movq %r9, 48(%rsp)
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movq 64(%rsp), %rsi # Copy args pushed by PLT in register.
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movq %rsi, %r11 # Multiply by 24
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addq %r11, %rsi
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addq %r11, %rsi
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shlq $3, %rsi
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movq 56(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset
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call _dl_fixup # Call resolver.
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movq %rax, %r11 # Save return value
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movq 48(%rsp), %r9 # Get register content back.
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movq 40(%rsp), %r8
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movq 32(%rsp), %rdi
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movq 24(%rsp), %rsi
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movq 16(%rsp), %rdx
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movq 8(%rsp), %rcx
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movq (%rsp), %rax
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addq $72, %rsp # Adjust stack(PLT did 2 pushes)
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cfi_adjust_cfa_offset(-72)
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jmp *%r11 # Jump to function address.
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cfi_endproc
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.size _dl_runtime_resolve, .-_dl_runtime_resolve
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#ifndef PROF
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.globl _dl_runtime_profile
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.type _dl_runtime_profile, @function
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.align 16
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cfi_startproc
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_dl_runtime_profile:
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subq $80, %rsp
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cfi_adjust_cfa_offset(96) # Incorporate PLT
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movq %rax, (%rsp) # Preserve registers otherwise clobbered.
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movq %rdx, 8(%rsp)
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movq %r8, 16(%rsp)
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movq %r9, 24(%rsp)
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movq %rcx, 32(%rsp)
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movq %rsi, 40(%rsp)
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movq %rdi, 48(%rsp)
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movq %rbp, 56(%rsp) # Information for auditors.
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leaq 96(%rsp), %rax
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movq %rax, 64(%rsp)
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leaq 8(%rsp), %rcx
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movq 96(%rsp), %rdx # Load return address if needed
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movq 88(%rsp), %rsi # Copy args pushed by PLT in register.
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movq %rsi,%r11 # Multiply by 24
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addq %r11,%rsi
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addq %r11,%rsi
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shlq $3, %rsi
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movq 80(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset
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leaq 72(%rsp), %r8
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call _dl_profile_fixup # Call resolver.
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movq %rax, %r11 # Save return value
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movq 8(%rsp), %rdx # Get back register content.
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movq 16(%rsp), %r8
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movq 24(%rsp), %r9
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movq (%rsp),%rax
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movq 72(%rsp), %r10
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testq %r10, %r10
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jns 1f
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movq 32(%rsp), %rcx
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movq 40(%rsp), %rsi
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movq 48(%rsp), %rdi
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addq $96,%rsp # Adjust stack
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cfi_adjust_cfa_offset (-96)
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jmp *%r11 # Jump to function address.
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/*
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+96 return address
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+88 PLT2
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+80 PLT1
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+72 free
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+64 %rsp
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+56 %rbp
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+48 %rdi
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+40 %rsi
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+32 %rcx
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+24 %r9
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+16 %r8
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+8 %rdx
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%esp %rax
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*/
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cfi_adjust_cfa_offset (96)
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1: movq %rbx, 72(%rsp)
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cfi_rel_offset (1, 72)
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leaq 104(%rsp), %rsi
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movq %rsp, %rbx
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cfi_def_cfa_register (1)
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movq %r10, %rcx
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addq $8, %r10
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andq $0xfffffffffffffff0, %r10
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subq %r10, %rsp
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movq %rsp, %rdi
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shrq $3, %rcx
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rep
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movsq
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movq 32(%rbx), %rcx
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movq 40(%rbx), %rsi
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movq 48(%rbx), %rdi
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call *%r11
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movq %rbx, %rsp
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cfi_def_cfa_register (7)
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subq $72, %rsp
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cfi_adjust_cfa_offset (72)
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movq %rsp, %rcx
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movq %rax, (%rcx)
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movq %rdx, 8(%rcx)
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/* Even though the stack is correctly aligned to allow using movaps
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we use movups. Some callers might provide an incorrectly aligned
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stack and we do not want to have it blow up here. */
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movups %xmm0, 16(%rcx)
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movups %xmm1, 32(%rcx)
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fstpt 48(%rcx)
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fstpt 64(%rcx)
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/*
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+168 return address
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+160 PLT2
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+152 PLT1
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+144 free
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+136 %rsp
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+128 %rbp
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+120 %rdi
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+112 %rsi
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+104 %rcx
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+96 %r9
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+88 %r8
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+80 %rdx
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+64 %st1 result
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+48 %st result
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+32 %xmm1 result
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+16 %xmm0 result
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+8 %rdx result
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%esp %rax result
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*/
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leaq 80(%rsp), %rdx
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movq 144(%rsp), %rbx
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cfi_restore (1)
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movq 160(%rsp), %rsi # Copy args pushed by PLT in register.
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movq %rsi,%r11 # Multiply by 24
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addq %r11,%rsi
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addq %r11,%rsi
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shlq $3, %rsi
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movq 152(%rsp), %rdi # %rdi: link_map, %rsi: reloc_offset
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call _dl_call_pltexit
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movq (%rsp), %rax
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movq 8(%rsp), %rdx
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movups 16(%rsp), %xmm0
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movups 32(%rsp), %xmm1
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fldt 64(%rsp)
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fldt 48(%rsp)
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addq $168, %rsp
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cfi_adjust_cfa_offset (-168)
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retq
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cfi_endproc
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.size _dl_runtime_profile, .-_dl_runtime_profile
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#endif
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