diff options
Diffstat (limited to 'sysdeps/i386/dl-trampoline.S')
| -rw-r--r-- | sysdeps/i386/dl-trampoline.S | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/sysdeps/i386/dl-trampoline.S b/sysdeps/i386/dl-trampoline.S deleted file mode 100644 index 6e7f3aef92..0000000000 --- a/sysdeps/i386/dl-trampoline.S +++ /dev/null @@ -1,215 +0,0 @@ -/* PLT trampolines. i386 version. - Copyright (C) 2004-2017 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, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#include <link-defines.h> - -#ifdef HAVE_MPX_SUPPORT -# define PRESERVE_BND_REGS_PREFIX bnd -#else -# define PRESERVE_BND_REGS_PREFIX .byte 0xf2 -#endif - - .text - .globl _dl_runtime_resolve - .type _dl_runtime_resolve, @function - cfi_startproc - .align 16 -_dl_runtime_resolve: - cfi_adjust_cfa_offset (8) - pushl %eax # Preserve registers otherwise clobbered. - cfi_adjust_cfa_offset (4) - pushl %ecx - cfi_adjust_cfa_offset (4) - pushl %edx - cfi_adjust_cfa_offset (4) - movl 16(%esp), %edx # Copy args pushed by PLT in register. Note - movl 12(%esp), %eax # that `fixup' takes its parameters in regs. - call _dl_fixup # Call resolver. - popl %edx # Get register content back. - cfi_adjust_cfa_offset (-4) - movl (%esp), %ecx - movl %eax, (%esp) # Store the function address. - movl 4(%esp), %eax - ret $12 # Jump to function address. - cfi_endproc - .size _dl_runtime_resolve, .-_dl_runtime_resolve - - -#ifndef PROF - .globl _dl_runtime_profile - .type _dl_runtime_profile, @function - cfi_startproc - .align 16 -_dl_runtime_profile: - cfi_adjust_cfa_offset (8) - pushl %esp - cfi_adjust_cfa_offset (4) - addl $8, (%esp) # Account for the pushed PLT data - pushl %ebp - cfi_adjust_cfa_offset (4) - pushl %eax # Preserve registers otherwise clobbered. - cfi_adjust_cfa_offset (4) - pushl %ecx - cfi_adjust_cfa_offset (4) - pushl %edx - cfi_adjust_cfa_offset (4) - movl %esp, %ecx - subl $8, %esp - cfi_adjust_cfa_offset (8) - movl $-1, 4(%esp) - leal 4(%esp), %edx - movl %edx, (%esp) - pushl %ecx # Address of the register structure - cfi_adjust_cfa_offset (4) - movl 40(%esp), %ecx # Load return address - movl 36(%esp), %edx # Copy args pushed by PLT in register. Note - movl 32(%esp), %eax # that `fixup' takes its parameters in regs. - call _dl_profile_fixup # Call resolver. - cfi_adjust_cfa_offset (-8) - movl (%esp), %edx - testl %edx, %edx - jns 1f - popl %edx - cfi_adjust_cfa_offset (-4) - popl %edx # Get register content back. - cfi_adjust_cfa_offset (-4) - movl (%esp), %ecx - movl %eax, (%esp) # Store the function address. - movl 4(%esp), %eax - ret $20 # Jump to function address. - - /* - +32 return address - +28 PLT1 - +24 PLT2 - +20 %esp - +16 %ebp - +12 %eax - +8 %ecx - +4 %edx - %esp free - */ - cfi_adjust_cfa_offset (8) -1: movl %ebx, (%esp) - cfi_rel_offset (ebx, 0) - movl %edx, %ebx # This is the frame buffer size - pushl %edi - cfi_adjust_cfa_offset (4) - cfi_rel_offset (edi, 0) - pushl %esi - cfi_adjust_cfa_offset (4) - cfi_rel_offset (esi, 0) - leal 44(%esp), %esi - movl %ebx, %ecx - orl $4, %ebx # Increase frame size if necessary to align - # stack for the function call - andl $~3, %ebx - movl %esp, %edi - subl %ebx, %edi - movl %esp, %ebx - cfi_def_cfa_register (ebx) - movl %edi, %esp - shrl $2, %ecx - rep - movsl - movl (%ebx), %esi - cfi_restore (esi) - movl 4(%ebx), %edi - cfi_restore (edi) - /* - %ebx+40 return address - %ebx+36 PLT1 - %ebx+32 PLT2 - %ebx+28 %esp - %ebx+24 %ebp - %ebx+20 %eax - %ebx+16 %ecx - %ebx+12 %edx - %ebx+8 %ebx - %ebx+4 free - %ebx free - %esp copied stack frame - */ - movl %eax, (%ebx) - movl 12(%ebx), %edx - movl 16(%ebx), %ecx - movl 20(%ebx), %eax - call *(%ebx) - movl %ebx, %esp - cfi_def_cfa_register (esp) - movl 8(%esp), %ebx - cfi_restore (ebx) - /* - +40 return address - +36 PLT1 - +32 PLT2 - +28 %esp - +24 %ebp - +20 %eax - +16 %ecx - +12 %edx - +8 free - +4 free - %esp free - */ -#if LONG_DOUBLE_SIZE != 12 -# error "long double size must be 12 bytes" -#endif - # Allocate space for La_i86_retval and subtract 12 free bytes. - subl $(LRV_SIZE - 12), %esp - cfi_adjust_cfa_offset (LRV_SIZE - 12) - movl %eax, LRV_EAX_OFFSET(%esp) - movl %edx, LRV_EDX_OFFSET(%esp) - fstpt LRV_ST0_OFFSET(%esp) - fstpt LRV_ST1_OFFSET(%esp) -#ifdef HAVE_MPX_SUPPORT - bndmov %bnd0, LRV_BND0_OFFSET(%esp) - bndmov %bnd1, LRV_BND1_OFFSET(%esp) -#else - .byte 0x66,0x0f,0x1b,0x44,0x24,LRV_BND0_OFFSET - .byte 0x66,0x0f,0x1b,0x4c,0x24,LRV_BND1_OFFSET -#endif - pushl %esp - cfi_adjust_cfa_offset (4) - # Address of La_i86_regs area. - leal (LRV_SIZE + 4)(%esp), %ecx - # PLT2 - movl (LRV_SIZE + 4 + LR_SIZE)(%esp), %eax - # PLT1 - movl (LRV_SIZE + 4 + LR_SIZE + 4)(%esp), %edx - call _dl_call_pltexit - movl LRV_EAX_OFFSET(%esp), %eax - movl LRV_EDX_OFFSET(%esp), %edx - fldt LRV_ST1_OFFSET(%esp) - fldt LRV_ST0_OFFSET(%esp) -#ifdef HAVE_MPX_SUPPORT - bndmov LRV_BND0_OFFSET(%esp), %bnd0 - bndmov LRV_BND1_OFFSET(%esp), %bnd1 -#else - .byte 0x66,0x0f,0x1a,0x44,0x24,LRV_BND0_OFFSET - .byte 0x66,0x0f,0x1a,0x4c,0x24,LRV_BND1_OFFSET -#endif - # Restore stack before return. - addl $(LRV_SIZE + 4 + LR_SIZE + 4), %esp - cfi_adjust_cfa_offset (-(LRV_SIZE + 4 + LR_SIZE + 4)) - PRESERVE_BND_REGS_PREFIX - ret - cfi_endproc - .size _dl_runtime_profile, .-_dl_runtime_profile -#endif |