2.5-18.1

1 files changed, 184 insertions, 0 deletions

diff --git a/sysdeps/i386/dl-trampoline.S b/sysdeps/i386/dl-trampoline.S
new file mode 100644
index 0000000000..fd87eb711d
--- /dev/null
+++ b/sysdeps/i386/dl-trampoline.S
@@ -0,0 +1,184 @@
+/* PLT trampolines.  i386 version.
+   Copyright (C) 2004, 2005 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
+	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)
+	popl %ecx
+	cfi_adjust_cfa_offset (-4)
+	xchgl %eax, (%esp)	# Get %eax contents end store function address.
+	ret $8			# 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)
+	popl %ecx
+	cfi_adjust_cfa_offset (-4)
+	xchgl %eax, (%esp)	# Get %eax contents end store function address.
+	ret $16			# 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 (12)
+1:	movl %ebx, (%esp)
+	cfi_rel_offset (3, 0)
+	movl %edx, %ebx		# This is the frame buffer size
+	pushl %edi
+	cfi_adjust_cfa_offset (4)
+	cfi_rel_offset (7, 0)
+	pushl %esi
+	cfi_adjust_cfa_offset (4)
+	cfi_rel_offset (6, 0)
+	leal 44(%esp), %esi
+	movl %ebx, %ecx
+	movl %esp, %edi
+	subl %ebx, %edi
+	andl $0xfffffff0, %edi	# Align stack
+	movl %esp, %ebx
+	cfi_def_cfa_register (3)
+	movl %edi, %esp
+	shrl $2, %ecx
+	rep
+	movsl
+	movl (%edi), %esi
+	cfi_restore (6)
+	movl 4(%edi), %edi
+	cfi_restore (7)
+	/*
+	   %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 (4)
+	movl 8(%esp), %ebx
+	cfi_restore (3)
+	/*
+	    +40     return address
+	    +36     PLT1
+	    +32     PLT2
+	    +28     %esp
+	    +24     %ebp
+	    +20     %eax
+	    +16     %ecx
+	    +12     %edx
+	    +8      free
+	    +4      free
+	   %esp     free
+	*/
+	subl $20, %esp
+	cfi_adjust_cfa_offset (20)
+	movl %eax, (%esp)
+	movl %edx, 4(%esp)
+	fstpt 8(%esp)
+	fstpt 20(%esp)
+	pushl %esp
+	cfi_adjust_cfa_offset (4)
+	leal 36(%esp), %ecx
+	movl 56(%esp), %eax
+	movl 60(%esp), %edx
+	call _dl_call_pltexit
+	movl (%esp), %eax
+	movl 4(%esp), %edx
+	fldt 20(%esp)
+	fldt 8(%esp)
+	addl $60, %esp
+	cfi_adjust_cfa_offset (-60)
+	ret
+	cfi_endproc
+	.size _dl_runtime_profile, .-_dl_runtime_profile
+#endif