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glibc/sysdeps/i386/dl-trampoline.S
Paul Eggert 5a82c74822 Prefer https to http for gnu.org and fsf.org URLs 
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:

sed -ri '
  s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
  s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
  $(find $(git ls-files) -prune -type f \
      ! -name '*.po' \
      ! -name 'ChangeLog*' \
      ! -path COPYING ! -path COPYING.LIB \
      ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
      ! -path manual/texinfo.tex ! -path scripts/config.guess \
      ! -path scripts/config.sub ! -path scripts/install-sh \
      ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
      ! -path INSTALL ! -path  locale/programs/charmap-kw.h \
      ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
      ! '(' -name configure \
            -execdir test -f configure.ac -o -f configure.in ';' ')' \
      ! '(' -name preconfigure \
            -execdir test -f preconfigure.ac ';' ')' \
      -print)

and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:

  chmod a+x sysdeps/unix/sysv/linux/riscv/configure
  # Omit irrelevant whitespace and comment-only changes,
  # perhaps from a slightly-different Autoconf version.
  git checkout -f \
    sysdeps/csky/configure \
    sysdeps/hppa/configure \
    sysdeps/riscv/configure \
    sysdeps/unix/sysv/linux/csky/configure
  # Omit changes that caused a pre-commit check to fail like this:
  # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
  git checkout -f \
    sysdeps/powerpc/powerpc64/ppc-mcount.S \
    sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
  # Omit change that caused a pre-commit check to fail like this:
  # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
  git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 02:43:31 -07:00

288 lines
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/* PLT trampolines. i386 version.
Copyright (C) 2004-2019 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
<https://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)
_CET_ENDBR
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
# The SHSTK compatible version.
.text
.globl _dl_runtime_resolve_shstk
.type _dl_runtime_resolve_shstk, @function
cfi_startproc
.align 16
_dl_runtime_resolve_shstk:
cfi_adjust_cfa_offset (8)
_CET_ENDBR
pushl %eax # Preserve registers otherwise clobbered.
cfi_adjust_cfa_offset (4)
pushl %edx
cfi_adjust_cfa_offset (4)
movl 12(%esp), %edx # Copy args pushed by PLT in register. Note
movl 8(%esp), %eax # that `fixup' takes its parameters in regs.
call _dl_fixup # Call resolver.
movl (%esp), %edx # Get register content back.
movl %eax, %ecx # Store the function address.
movl 4(%esp), %eax # Get register content back.
addl $16, %esp # Adjust stack: PLT1 + PLT2 + %eax + %edx
cfi_adjust_cfa_offset (-16)
jmp *%ecx # Jump to function address.
cfi_endproc
.size _dl_runtime_resolve_shstk, .-_dl_runtime_resolve_shstk
#ifndef PROF
# The SHSTK compatible version.
.globl _dl_runtime_profile_shstk
.type _dl_runtime_profile_shstk, @function
cfi_startproc
.align 16
_dl_runtime_profile_shstk:
cfi_adjust_cfa_offset (8)
_CET_ENDBR
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
movl 4(%esp), %edx # Get register content back.
movl %eax, %ecx # Store the function address.
movl 12(%esp), %eax # Get register content back.
# Adjust stack: PLT1 + PLT2 + %esp + %ebp + %eax + %ecx + %edx
# + free.
addl $32, %esp
cfi_adjust_cfa_offset (-32)
jmp *%ecx # Jump to function address.
cfi_endproc
.size _dl_runtime_profile_shstk, .-_dl_runtime_profile_shstk
.globl _dl_runtime_profile
.type _dl_runtime_profile, @function
cfi_startproc
.align 16
_dl_runtime_profile:
cfi_adjust_cfa_offset (8)
_CET_ENDBR
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
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