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Update. 

2002-08-31  Andreas Jaeger  <aj@suse.de>

	* sysdeps/unix/sysv/linux/x86_64/Makefile (sysdep_routines): Add
	__start_context.

	* sysdeps/unix/sysv/linux/x86_64/__start_context.S: New file.

	* sysdeps/unix/sysv/linux/x86_64/makecontext.c: New file.

	* sysdeps/unix/sysv/linux/x86_64/ucontext_i.h: Add defines for
	registers used for passing args.

	* sysdeps/unix/sysv/linux/x86_64/swapcontext.S: Save and restore
	all needed registers.

	* sysdeps/unix/sysv/linux/x86_64/setcontext.S: Restore all
	registers.

	* sysdeps/unix/sysv/linux/x86_64/getcontext.S: Save all needed
	registers.
This commit is contained in:
Andreas Jaeger 2002-08-31 08:06:48 +00:00
parent ba1e2fe668
commit c816e07413
7 changed files with 118 additions and 3 deletions
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21
ChangeLog
View File

@ -1,3 +1,24 @@
2002-08-31 Andreas Jaeger <aj@suse.de>
* sysdeps/unix/sysv/linux/x86_64/Makefile (sysdep_routines): Add
__start_context.
* sysdeps/unix/sysv/linux/x86_64/__start_context.S: New file.
* sysdeps/unix/sysv/linux/x86_64/makecontext.c: New file.
* sysdeps/unix/sysv/linux/x86_64/ucontext_i.h: Add defines for
registers used for passing args.
* sysdeps/unix/sysv/linux/x86_64/swapcontext.S: Save and restore
all needed registers.
* sysdeps/unix/sysv/linux/x86_64/setcontext.S: Restore all
registers.
* sysdeps/unix/sysv/linux/x86_64/getcontext.S: Save all needed
registers.
2002-08-30 Ulrich Drepper <drepper@redhat.com>
* elf/dynamic-link.h (elf_get_dynamic_info): Mark with

4
sysdeps/unix/sysv/linux/x86_64/Makefile
View File

@ -44,3 +44,7 @@ $(objpfx)syscall-%.h $(objpfx)syscall-%.d: ../sysdeps/unix/sysv/linux/sys/syscal
mv -f $(@:.h=.d)-t2 $(@:.h=.d)
endif
ifeq ($(subdir),stdlib)
sysdep_routines += __start_context
endif

48
sysdeps/unix/sysv/linux/x86_64/__start_context.S Normal file
View File

@ -0,0 +1,48 @@
/* Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>, 2002.
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>
/* This is the helper code which gets called if a function which is
registered with 'makecontext' returns. In this case we have to
install the context listed in the uc_link element of the context
'makecontext' manipulated at the time of the 'makecontext' call.
If the pointer is NULL the process must terminate. */
ENTRY(__start_context)
/* This removes the parameters passed to the function given to
'makecontext' from the stack. RBX contains the address
on the stack pointer for the next context. */
movq %rbx, %rsp
popq %rdi /* This is the next context. */
testq %rdi, %rdi
je 2f /* If it is zero exit. */
call JUMPTARGET(__setcontext)
/* If this returns (which can happen if the syscall fails) we'll
exit the program with the return error value (-1). */
2: movq %rax,%rdi
call JUMPTARGET(exit)
/* The 'exit' call should never return. In case it does cause
the process to terminate. */
hlt
END(__start_context)

10
sysdeps/unix/sysv/linux/x86_64/getcontext.S
View File

@ -33,7 +33,8 @@
ENTRY(__getcontext)
/* Save the preserved registers and the return address. */
/* Save the preserved registers, the registers used for passing
args, and the return address. */
movq %rbx, oRBX(%rdi)
movq %rbp, oRBP(%rdi)
movq %r12, oR12(%rdi)
@ -41,6 +42,13 @@ ENTRY(__getcontext)
movq %r14, oR14(%rdi)
movq %r15, oR15(%rdi)
movq %rdi, oRDI(%rdi)
movq %rsi, oRSI(%rdi)
movq %rdx, oRDX(%rdi)
movq %rcx, oRCX(%rdi)
movq %r8, oR8(%rdi)
movq %r9, oR9(%rdi)
movq (%rsp), %rcx
movq %rcx, oRIP(%rdi)
leaq 8(%rsp), %rcx /* Exclude the return address. */

12
sysdeps/unix/sysv/linux/x86_64/setcontext.S
View File

@ -55,7 +55,8 @@ ENTRY(__setcontext)
ldmxcsr oMXCSR(%rdi)
/* Load the new stack pointer and the preserved registers. */
/* Load the new stack pointer, the preserved registers and
registers used for passing args. */
movq oRSP(%rdi), %rsp
movq oRBX(%rdi), %rbx
movq oRBP(%rdi), %rbp
@ -69,6 +70,15 @@ ENTRY(__setcontext)
movq oRIP(%rdi), %rcx
pushq %rcx
movq oRSI(%rdi), %rsi
movq oRDX(%rdi), %rdx
movq oRCX(%rdi), %rcx
movq oR8(%rdi), %r8
movq oR9(%rdi), %r9
/* Setup finally %rdi. */
movq oRDI(%rdi), %rdi
/* Clear rax to indicate success. */
xorq %rax, %rax

20
sysdeps/unix/sysv/linux/x86_64/swapcontext.S
View File

@ -35,7 +35,8 @@
other than the PRESERVED state. */
ENTRY(__swapcontext)
/* Save the preserved registers and the return address. */
/* Save the preserved registers, the registers used for passing args,
and the return address. */
movq %rbx, oRBX(%rdi)
movq %rbp, oRBP(%rdi)
movq %r12, oR12(%rdi)
@ -43,6 +44,13 @@ ENTRY(__swapcontext)
movq %r14, oR14(%rdi)
movq %r15, oR15(%rdi)
movq %rdi, oRDI(%rdi)
movq %rsi, oRSI(%rdi)
movq %rdx, oRDX(%rdi)
movq %rcx, oRCX(%rdi)
movq %r8, oR8(%rdi)
movq %r9, oR9(%rdi)
movq (%rsp), %rcx
movq %rcx, oRIP(%rdi)
leaq 8(%rsp), %rcx /* Exclude the return address. */
@ -95,6 +103,16 @@ ENTRY(__swapcontext)
movq oRIP(%rsi), %rcx
pushq %rcx
/* Setup registers used for passing args. */
movq oRDI(%rsi), %rdi
movq oRDX(%rsi), %rdx
movq oRCX(%rsi), %rcx
movq oR8(%rsi), %r8
movq oR9(%rsi), %r9
/* Setup finally %rsi. */
movq oRSI(%rsi), %rsi
/* Clear rax to indicate success. */
xorq %rax, %rax

6
sysdeps/unix/sysv/linux/x86_64/ucontext_i.h
View File

@ -29,11 +29,17 @@
#define oRBP 120
#define oRSP 160
#define oRBX 128
#define oR8 40
#define oR9 48
#define oR12 72
#define oR13 80
#define oR14 88
#define oR15 96
#define oRDI 104
#define oRSI 112
#define oRDX 136
#define oRAX 144
#define oRCX 152
#define oRIP 168
#define oFPREGS 208
#define oSIGMASK 280