mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/* Copyright (C) 2001-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Jakub Jelinek <jakub@redhat.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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <ucontext.h>
|
|
|
|
extern void __start_context (struct ucontext *ucp);
|
|
|
|
void
|
|
__makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
|
|
{
|
|
extern void __makecontext_ret (void);
|
|
unsigned long *sp, *topsp;
|
|
va_list ap;
|
|
int i;
|
|
|
|
sp = (unsigned long *) ((long) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
|
|
sp -= (argc > 6 ? argc : 6) + 32;
|
|
sp = (unsigned long *) (((long) sp) & -16L);
|
|
topsp = sp + (argc > 6 ? argc : 6) + 16;
|
|
|
|
ucp->uc_mcontext.mc_gregs[MC_PC] = (long) func;
|
|
ucp->uc_mcontext.mc_gregs[MC_NPC] = ((long) func) + 4;
|
|
ucp->uc_mcontext.mc_gregs[MC_O6] = ((long) sp) - 0x7ff;
|
|
ucp->uc_mcontext.mc_gregs[MC_O7] = ((long) __start_context) - 8;
|
|
ucp->uc_mcontext.mc_fp = ((long) topsp) - 0x7ff;
|
|
ucp->uc_mcontext.mc_i7 = 0;
|
|
topsp[14] = 0;
|
|
topsp[15] = 0;
|
|
sp[8] = (long) ucp->uc_link;
|
|
va_start (ap, argc);
|
|
for (i = 0; i < argc; ++i)
|
|
if (i < 6)
|
|
ucp->uc_mcontext.mc_gregs[MC_O0 + i] = va_arg (ap, long);
|
|
else
|
|
sp[16 + i] = va_arg (ap, long);
|
|
va_end (ap);
|
|
}
|
|
|
|
weak_alias (__makecontext, makecontext)
|