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55f41ef8de
The _dl_non_dynamic_init does not parse LD_PROFILE, which does not enable profile for dlopen objects. Since dlopen is deprecated for static objects, it is better to remove the support. It also allows to trim down libc.a of profile support. Checked on x86_64-linux-gnu. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
267 lines
7.2 KiB
ArmAsm
267 lines
7.2 KiB
ArmAsm
/* PLT trampolines. i386 version.
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Copyright (C) 2004-2023 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, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <link-defines.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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cfi_startproc
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.align 16
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_dl_runtime_resolve:
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cfi_adjust_cfa_offset (8)
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_CET_ENDBR
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pushl %eax # Preserve registers otherwise clobbered.
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %edx
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cfi_adjust_cfa_offset (4)
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movl 16(%esp), %edx # Copy args pushed by PLT in register. Note
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movl 12(%esp), %eax # that `fixup' takes its parameters in regs.
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call _dl_fixup # Call resolver.
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popl %edx # Get register content back.
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cfi_adjust_cfa_offset (-4)
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movl (%esp), %ecx
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movl %eax, (%esp) # Store the function address.
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movl 4(%esp), %eax
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ret $12 # 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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# The SHSTK compatible version.
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.text
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.globl _dl_runtime_resolve_shstk
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.type _dl_runtime_resolve_shstk, @function
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cfi_startproc
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.align 16
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_dl_runtime_resolve_shstk:
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cfi_adjust_cfa_offset (8)
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_CET_ENDBR
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pushl %eax # Preserve registers otherwise clobbered.
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cfi_adjust_cfa_offset (4)
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pushl %edx
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cfi_adjust_cfa_offset (4)
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movl 12(%esp), %edx # Copy args pushed by PLT in register. Note
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movl 8(%esp), %eax # that `fixup' takes its parameters in regs.
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call _dl_fixup # Call resolver.
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movl (%esp), %edx # Get register content back.
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movl %eax, %ecx # Store the function address.
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movl 4(%esp), %eax # Get register content back.
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addl $16, %esp # Adjust stack: PLT1 + PLT2 + %eax + %edx
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cfi_adjust_cfa_offset (-16)
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jmp *%ecx # Jump to function address.
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cfi_endproc
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.size _dl_runtime_resolve_shstk, .-_dl_runtime_resolve_shstk
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#if !defined PROF && defined SHARED
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# The SHSTK compatible version.
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.globl _dl_runtime_profile_shstk
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.type _dl_runtime_profile_shstk, @function
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cfi_startproc
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.align 16
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_dl_runtime_profile_shstk:
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cfi_adjust_cfa_offset (8)
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_CET_ENDBR
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pushl %esp
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cfi_adjust_cfa_offset (4)
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addl $8, (%esp) # Account for the pushed PLT data
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pushl %ebp
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cfi_adjust_cfa_offset (4)
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pushl %eax # Preserve registers otherwise clobbered.
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %edx
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cfi_adjust_cfa_offset (4)
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movl %esp, %ecx
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subl $8, %esp
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cfi_adjust_cfa_offset (8)
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movl $-1, 4(%esp)
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leal 4(%esp), %edx
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movl %edx, (%esp)
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pushl %ecx # Address of the register structure
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cfi_adjust_cfa_offset (4)
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movl 40(%esp), %ecx # Load return address
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movl 36(%esp), %edx # Copy args pushed by PLT in register. Note
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movl 32(%esp), %eax # that `fixup' takes its parameters in regs.
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call _dl_profile_fixup # Call resolver.
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cfi_adjust_cfa_offset (-8)
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movl (%esp), %edx
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testl %edx, %edx
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jns 1f
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movl 4(%esp), %edx # Get register content back.
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movl %eax, %ecx # Store the function address.
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movl 12(%esp), %eax # Get register content back.
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# Adjust stack: PLT1 + PLT2 + %esp + %ebp + %eax + %ecx + %edx
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# + free.
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addl $32, %esp
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cfi_adjust_cfa_offset (-32)
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jmp *%ecx # Jump to function address.
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cfi_endproc
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.size _dl_runtime_profile_shstk, .-_dl_runtime_profile_shstk
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.globl _dl_runtime_profile
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.type _dl_runtime_profile, @function
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cfi_startproc
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.align 16
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_dl_runtime_profile:
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cfi_adjust_cfa_offset (8)
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_CET_ENDBR
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pushl %esp
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cfi_adjust_cfa_offset (4)
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addl $8, (%esp) # Account for the pushed PLT data
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pushl %ebp
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cfi_adjust_cfa_offset (4)
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pushl %eax # Preserve registers otherwise clobbered.
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cfi_adjust_cfa_offset (4)
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pushl %ecx
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cfi_adjust_cfa_offset (4)
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pushl %edx
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cfi_adjust_cfa_offset (4)
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movl %esp, %ecx
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subl $8, %esp
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cfi_adjust_cfa_offset (8)
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movl $-1, 4(%esp)
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leal 4(%esp), %edx
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movl %edx, (%esp)
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pushl %ecx # Address of the register structure
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cfi_adjust_cfa_offset (4)
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movl 40(%esp), %ecx # Load return address
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movl 36(%esp), %edx # Copy args pushed by PLT in register. Note
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movl 32(%esp), %eax # that `fixup' takes its parameters in regs.
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call _dl_profile_fixup # Call resolver.
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cfi_adjust_cfa_offset (-8)
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movl (%esp), %edx
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testl %edx, %edx
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jns 1f
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popl %edx
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cfi_adjust_cfa_offset (-4)
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popl %edx # Get register content back.
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cfi_adjust_cfa_offset (-4)
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movl (%esp), %ecx
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movl %eax, (%esp) # Store the function address.
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movl 4(%esp), %eax
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ret $20 # Jump to function address.
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/*
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+32 return address
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+28 PLT1
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+24 PLT2
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+20 %esp
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+16 %ebp
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+12 %eax
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+8 %ecx
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+4 %edx
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%esp free
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*/
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cfi_adjust_cfa_offset (8)
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1: movl %ebx, (%esp)
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cfi_rel_offset (ebx, 0)
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movl %edx, %ebx # This is the frame buffer size
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pushl %edi
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (edi, 0)
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pushl %esi
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cfi_adjust_cfa_offset (4)
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cfi_rel_offset (esi, 0)
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leal 44(%esp), %esi
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movl %ebx, %ecx
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orl $4, %ebx # Increase frame size if necessary to align
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# stack for the function call
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andl $~3, %ebx
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movl %esp, %edi
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subl %ebx, %edi
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movl %esp, %ebx
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cfi_def_cfa_register (ebx)
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movl %edi, %esp
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shrl $2, %ecx
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rep
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movsl
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movl (%ebx), %esi
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cfi_restore (esi)
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movl 4(%ebx), %edi
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cfi_restore (edi)
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/*
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%ebx+40 return address
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%ebx+36 PLT1
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%ebx+32 PLT2
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%ebx+28 %esp
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%ebx+24 %ebp
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%ebx+20 %eax
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%ebx+16 %ecx
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%ebx+12 %edx
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%ebx+8 %ebx
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%ebx+4 free
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%ebx free
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%esp copied stack frame
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*/
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movl %eax, (%ebx)
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movl 12(%ebx), %edx
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movl 16(%ebx), %ecx
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movl 20(%ebx), %eax
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call *(%ebx)
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movl %ebx, %esp
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cfi_def_cfa_register (esp)
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movl 8(%esp), %ebx
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cfi_restore (ebx)
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/*
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+40 return address
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+36 PLT1
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+32 PLT2
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+28 %esp
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+24 %ebp
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+20 %eax
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+16 %ecx
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+12 %edx
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+8 free
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+4 free
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%esp free
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*/
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#if LONG_DOUBLE_SIZE != 12
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# error "long double size must be 12 bytes"
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#endif
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# Allocate space for La_i86_retval and subtract 12 free bytes.
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subl $(LRV_SIZE - 12), %esp
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cfi_adjust_cfa_offset (LRV_SIZE - 12)
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movl %eax, LRV_EAX_OFFSET(%esp)
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movl %edx, LRV_EDX_OFFSET(%esp)
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fstpt LRV_ST0_OFFSET(%esp)
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fstpt LRV_ST1_OFFSET(%esp)
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pushl %esp
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cfi_adjust_cfa_offset (4)
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# Address of La_i86_regs area.
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leal (LRV_SIZE + 4)(%esp), %ecx
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# PLT2
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movl (LRV_SIZE + 4 + LR_SIZE)(%esp), %eax
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# PLT1
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movl (LRV_SIZE + 4 + LR_SIZE + 4)(%esp), %edx
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call _dl_audit_pltexit
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movl LRV_EAX_OFFSET(%esp), %eax
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movl LRV_EDX_OFFSET(%esp), %edx
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fldt LRV_ST1_OFFSET(%esp)
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fldt LRV_ST0_OFFSET(%esp)
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# Restore stack before return.
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addl $(LRV_SIZE + 4 + LR_SIZE + 4), %esp
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cfi_adjust_cfa_offset (-(LRV_SIZE + 4 + LR_SIZE + 4))
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ret
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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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