diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/sparc/sparc64/makecontext.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sparc/sparc64/makecontext.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/makecontext.c b/sysdeps/unix/sysv/linux/sparc/sparc64/makecontext.c new file mode 100644 index 0000000000..93ac398b2c --- /dev/null +++ b/sysdeps/unix/sysv/linux/sparc/sparc64/makecontext.c @@ -0,0 +1,67 @@ +/* Copyright (C) 2001 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> +#include <ucontext.h> + +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 = (long *) ((long) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size); + sp -= (argc > 6 ? argc : 6) + 32; + sp = (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) __makecontext_ret) - 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); +} + +asm (" \n\ + .text \n\ + .type __makecontext_ret, #function \n\ +__makecontext_ret: \n\ + mov 1, %o1 \n\ + call __setcontext \n\ + mov %i0, %o0 \n\ + unimp 0 \n\ + .size __makecontext_ret, .-__makecontext_ret \n\ + "); + +weak_alias (__makecontext, makecontext) |