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Implement signalcontext.

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This commit is contained in:
Jake Burkholder 2003-08-08 15:40:28 +00:00
parent 0a6c03778a
commit b551cb80d4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=118655
2 changed files with 78 additions and 2 deletions
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4
lib/libc/sparc64/gen/Makefile.inc
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@ -2,5 +2,5 @@
SRCS+= _ctx_start.S _setjmp.S fabs.S fixunsdfsi.S flt_rounds.c fpgetmask.c \
fpgetround.c fpgetsticky.c fpsetmask.c fpsetround.c fpsetsticky.c \
frexp.c infinity.c isinf.c ldexp.c makecontext.c modf.S setjmp.S \
sigsetjmp.S
frexp.c infinity.c isinf.c ldexp.c makecontext.c modf.S \
signalcontext.c setjmp.S sigsetjmp.S

76
lib/libc/sparc64/gen/signalcontext.c Normal file
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@ -0,0 +1,76 @@
/*-
* Copyright (c) 2003 Jake Burkholder.
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/signal.h>
#include <sys/ucontext.h>
#include <machine/frame.h>
#include <machine/sigframe.h>
#include <errno.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
__weak_reference(__signalcontext, signalcontext);
extern void _ctx_start(void);
int
__signalcontext(ucontext_t *ucp, int sig, __sighandler_t *func)
{
struct sigframe *sfp;
struct frame *fp;
mcontext_t *mc;
mc = &ucp->uc_mcontext;
sfp = (struct sigframe *)(mc->mc_sp + SPOFF) - 1;
fp = (struct frame *)sfp - 1;
bzero(fp, sizeof(*fp));
bzero(sfp, sizeof(*sfp));
bcopy(ucp, &sfp->sf_uc, sizeof(*ucp));
sfp->sf_si.si_signo = sig;
mc->mc_global[1] = (uint64_t)func;
mc->mc_global[2] = (uint64_t)ucp;
mc->mc_out[0] = sig;
mc->mc_out[1] = (uint64_t)&sfp->sf_si;
mc->mc_out[2] = (uint64_t)&sfp->sf_uc;
mc->mc_out[6] = (uint64_t)fp - SPOFF;
mc->mc_tnpc = (uint64_t)_ctx_start + 4;
mc->mc_tpc = (uint64_t)_ctx_start;
ucp->uc_link = &sfp->sf_uc;
sigdelset(&ucp->uc_sigmask, sig);
return (0);
}