98bfdf3a78
GDT to be loaded into FS.base and GS.base, these values of course are not the values set by sysarch() with I386_SET_FSBASE and I386_SET_GSBASE, the change fixed a crash for 32bit libthr after signal handler returned and normal code is accessing thread pointer, for example: movl %gs:8, %eax.
85 lines
2.6 KiB
ArmAsm
85 lines
2.6 KiB
ArmAsm
/*-
|
|
* Copyright (c) 2003 Peter Wemm
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_compat.h"
|
|
|
|
#include <machine/asmacros.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#include "ia32_assym.h"
|
|
|
|
.text
|
|
.code32
|
|
/*
|
|
* Signal trampoline, copied to top of user stack
|
|
* XXX may need to be MD to match backend sendsig handoff protocol
|
|
*/
|
|
ALIGN_TEXT
|
|
.globl ia32_sigcode
|
|
ia32_sigcode:
|
|
calll *IA32_SIGF_HANDLER(%esp)
|
|
leal IA32_SIGF_UC(%esp),%eax /* get ucontext */
|
|
pushl %eax
|
|
movl IA32_UC_ES(%eax),%es /* restore %es */
|
|
movl IA32_UC_DS(%eax),%ds /* restore %ds */
|
|
movl $SYS_sigreturn,%eax
|
|
pushl %eax /* junk to fake return addr. */
|
|
int $0x80 /* enter kernel with args */
|
|
/* on stack */
|
|
1:
|
|
jmp 1b
|
|
|
|
#ifdef COMPAT_FREEBSD4
|
|
ALIGN_TEXT
|
|
freebsd4_ia32_sigcode:
|
|
calll *IA32_SIGF_HANDLER(%esp)
|
|
leal IA32_SIGF_UC4(%esp),%eax/* get ucontext */
|
|
pushl %eax
|
|
movl IA32_UC4_ES(%eax),%es /* restore %es */
|
|
movl IA32_UC4_DS(%eax),%ds /* restore %ds */
|
|
movl $344,%eax /* 4.x SYS_sigreturn */
|
|
pushl %eax /* junk to fake return addr. */
|
|
int $0x80 /* enter kernel with args */
|
|
/* on stack */
|
|
1:
|
|
jmp 1b
|
|
#endif
|
|
|
|
ALIGN_TEXT
|
|
esigcode:
|
|
|
|
.data
|
|
.globl sz_ia32_sigcode
|
|
sz_ia32_sigcode:
|
|
.long esigcode-ia32_sigcode
|
|
#ifdef COMPAT_FREEBSD4
|
|
.globl sz_freebsd4_ia32_sigcode
|
|
sz_freebsd4_ia32_sigcode:
|
|
.long esigcode-freebsd4_ia32_sigcode
|
|
#endif
|