mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-28 23:34:53 +03:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/* Copyright (C) 2001 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
|
|
|
|
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 <libintl.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <ucontext.h>
|
|
#include <sys/rse.h>
|
|
|
|
|
|
struct fdesc
|
|
{
|
|
unsigned long ip;
|
|
unsigned long gp;
|
|
};
|
|
|
|
#define PUSH(val) \
|
|
do { \
|
|
if (ia64_rse_is_rnat_slot (rbs)) \
|
|
*rbs++ = 0; \
|
|
*rbs++ = (val); \
|
|
} while (0)
|
|
|
|
|
|
/* This implementation can handle an ARGC value of at most 8 and
|
|
values can be passed only in integer registers (r32-r39). */
|
|
|
|
void
|
|
__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
|
|
{
|
|
struct sigcontext *sc = &ucp->uc_mcontext;
|
|
extern void __start_context (ucontext_t *link, long gp, ...);
|
|
unsigned long stack_start, stack_end;
|
|
va_list ap;
|
|
long *rbs;
|
|
int i;
|
|
|
|
stack_start = (long) sc->sc_stack.ss_sp;
|
|
stack_end = (long) sc->sc_stack.ss_sp + sc->sc_stack.ss_size;
|
|
|
|
stack_start = (stack_start + 7) & -8;
|
|
stack_end = stack_end & -16;
|
|
|
|
if (argc > 8)
|
|
{
|
|
fprintf (stderr, _("\
|
|
makecontext: does not know how to handle more than 8 arguments\n"));
|
|
exit (-1);
|
|
}
|
|
|
|
/* set the entry point and global pointer: */
|
|
sc->sc_br[0] = ((struct fdesc *) &__start_context)->ip;
|
|
sc->sc_br[1] = ((struct fdesc *) func)->ip;
|
|
sc->sc_gr[1] = ((struct fdesc *) func)->gp;
|
|
|
|
/* set up the call frame: */
|
|
sc->sc_ar_pfs = ((sc->sc_ar_pfs & ~0x3fffffffffUL)
|
|
| (argc + 2) | ((argc + 2) << 7));
|
|
rbs = (long *) stack_start;
|
|
PUSH((long) ucp->uc_link);
|
|
PUSH(((struct fdesc *) &__start_context)->gp);
|
|
va_start (ap, argc);
|
|
for (i = 0; i < argc; ++i)
|
|
PUSH(va_arg (ap, long));
|
|
va_end (ap);
|
|
|
|
/* set the memory and register stack pointers: */
|
|
sc->sc_ar_bsp = (long) rbs;
|
|
sc->sc_gr[12] = stack_end - 16;
|
|
|
|
/* clear the NaT bits for r1 and r12: */
|
|
sc->sc_nat &= ~((1 << 1) | (1 << 12));
|
|
sc->sc_ar_rnat = 0;
|
|
}
|
|
|
|
weak_alias (__makecontext, makecontext)
|