projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b168057a | 1 | /* Copyright (C) 2001-2015 Free Software Foundation, Inc. |
| 9bab9806 UD |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Jakub Jelinek <jakub@redhat.com>. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9bab9806 UD |
9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| 9bab9806 | 14 | |
| 41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 9bab9806 UD |
18 | |
| 19 | #include <stdarg.h> | |
| 20 | #include <stdio.h> | |
| 21 | #include <stdlib.h> | |
| 22 | #include <ucontext.h> | |
| 23 | ||
| 60e8270d DM |
24 | extern void __start_context (struct ucontext *ucp); |
| 25 | ||
| 9bab9806 UD |
26 | void |
| 27 | __makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...) | |
| 28 | { | |
| 29 | extern void __makecontext_ret (void); | |
| 30 | unsigned long *sp, *topsp; | |
| 31 | va_list ap; | |
| 32 | int i; | |
| 33 | ||
| a1bcbd40 | 34 | sp = (unsigned long *) ((long) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size); |
| 9bab9806 | 35 | sp -= (argc > 6 ? argc : 6) + 32; |
| a1bcbd40 | 36 | sp = (unsigned long *) (((long) sp) & -16L); |
| 9bab9806 UD |
37 | topsp = sp + (argc > 6 ? argc : 6) + 16; |
| 38 | ||
| 39 | ucp->uc_mcontext.mc_gregs[MC_PC] = (long) func; | |
| 40 | ucp->uc_mcontext.mc_gregs[MC_NPC] = ((long) func) + 4; | |
| 41 | ucp->uc_mcontext.mc_gregs[MC_O6] = ((long) sp) - 0x7ff; | |
| 60e8270d | 42 | ucp->uc_mcontext.mc_gregs[MC_O7] = ((long) __start_context) - 8; |
| 9bab9806 UD |
43 | ucp->uc_mcontext.mc_fp = ((long) topsp) - 0x7ff; |
| 44 | ucp->uc_mcontext.mc_i7 = 0; | |
| 45 | topsp[14] = 0; | |
| 46 | topsp[15] = 0; | |
| 47 | sp[8] = (long) ucp->uc_link; | |
| 48 | va_start (ap, argc); | |
| 49 | for (i = 0; i < argc; ++i) | |
| 50 | if (i < 6) | |
| 51 | ucp->uc_mcontext.mc_gregs[MC_O0 + i] = va_arg (ap, long); | |
| 52 | else | |
| 53 | sp[16 + i] = va_arg (ap, long); | |
| 54 | va_end (ap); | |
| 55 | } | |
| 56 | ||
| 9bab9806 | 57 | weak_alias (__makecontext, makecontext) |