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* gendef (stabilize_sig_stack): New function. 

(setjmp): Import, add sig stack handling.  Store sig stack info.
(longjmp): Call stabilize_sig_stack.  Restore sig stack info.
* config/i386/setjmp.c: Remove.
This commit is contained in:
Christopher Faylor 2004-02-18 20:48:38 +00:00
parent a682de34be
commit 2d6c4a1a65
3 changed files with 62 additions and 54 deletions
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7
winsup/cygwin/ChangeLog
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@ -1,3 +1,10 @@
2004-02-18 Christopher Faylor <cgf@redhat.com>
* gendef (stabilize_sig_stack): New function.
(setjmp): Import, add sig stack handling. Store sig stack info.
(longjmp): Call stabilize_sig_stack. Restore sig stack info.
* config/i386/setjmp.c: Remove.
2004-02-17 Corinna Vinschen <corinna@vinschen.de>
* fork.cc (fork_child): Move fixup_shms_after_fork so that

48
winsup/cygwin/config/i386/setjmp.c
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@ -1,48 +0,0 @@
/* setjmp.c
Copyright 1996, 1998, 1999, 2000, 2001 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifdef __i386__
#if 1
asm(" .globl _setjmp \n"
"_setjmp: \n"
" pushl %ebp \n"
" movl %esp,%ebp \n"
" pushl %edi \n"
" movl 8(%ebp),%edi \n"
" movl %eax,0(%edi) \n"
" movl %ebx,4(%edi) \n"
" movl %ecx,8(%edi) \n"
" movl %edx,12(%edi) \n"
" movl %esi,16(%edi) \n"
" movl -4(%ebp),%eax \n"
" movl %eax,20(%edi) \n"
" movl 0(%ebp),%eax \n"
" movl %eax,24(%edi) \n"
" movl %esp,%eax \n"
" addl $12,%eax \n"
" movl %eax,28(%edi) \n"
" movl 4(%ebp),%eax \n"
" movl %eax,32(%edi) \n"
" movw %es, %ax \n"
" movw %ax, 36(%edi) \n"
" movw %fs, %ax \n"
" movw %ax, 38(%edi) \n"
" movw %gs, %ax \n"
" movw %ax, 40(%edi) \n"
" movw %ss, %ax \n"
" movw %ax, 42(%edi) \n"
" popl %edi \n"
" movl $0,%eax \n"
" leave \n"
" ret \n");
#endif
#endif /* __i386__ */

61
winsup/cygwin/gendef
View File

@ -236,9 +236,8 @@ EOF
sub longjmp {
return <<EOF;
.globl _longjmp
_longjmp:
.extern __ZN7_cygtls19call_signal_handlerEv
stabilize_sig_stack:
1: movl %fs:4,%edx
movl \$1,%eax
lock xchgl %eax,$tls::stacklock(%edx)
@ -248,12 +247,63 @@ _longjmp:
xorl %eax,%eax
call _low_priority_sleep
jmp 1b
2: leal ($tls::stack)(%edx),%eax
movl %eax,($tls::stackptr)(%edx)
2: cmpl \$0,$tls::sig(%edx)
jz 3f
decl $tls::stacklock(%edx)
movl %edx,%eax
call __ZN7_cygtls19call_signal_handlerEv
jmp 1b
3: ret
.globl _setjmp
_setjmp:
pushl %ebp
movl %esp,%ebp
pushl %edi
movl 8(%ebp),%edi
movl %eax,0(%edi)
movl %ebx,4(%edi)
movl %ecx,8(%edi)
movl %edx,12(%edi)
movl %esi,16(%edi)
movl -4(%ebp),%eax
movl %eax,20(%edi)
movl 0(%ebp),%eax
movl %eax,24(%edi)
movl %esp,%eax
addl \$12,%eax
movl %eax,28(%edi)
movl 4(%ebp),%eax
movl %eax,32(%edi)
movw %es,%ax
movw %ax,36(%edi)
movw %fs,%ax
movw %ax,38(%edi)
movw %gs,%ax
movw %ax,40(%edi)
movw %ss,%ax
movw %ax,42(%edi)
pushl %edx
call stabilize_sig_stack
movl $tls::stackptr(%edx),%eax # save stack pointer contents
decl $tls::stacklock(%edx)
popl %edx
movl %eax,44(%edi)
popl %edi
movl \$0,%eax
leave
ret
.globl _longjmp
_longjmp:
pushl %ebp
movl %esp,%ebp
movl 8(%ebp),%edi # address of buffer
call stabilize_sig_stack
movl 44(%edi),%eax # get old signal stack
movl %eax,$tls::stackptr(%edx) # restore
decl $tls::stacklock(%edx) # relinquish lock
movl 12(%ebp),%eax
testl %eax,%eax
jne 3f
@ -276,7 +326,6 @@ _longjmp:
movl 4(%edi),%ebx
movl 8(%edi),%ecx
movl 16(%edi),%esi
decl $tls::stacklock(%edx)
movl 12(%edi),%edx
movl 20(%edi),%edi
popfl