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glibc  2.9
longjmp-ts.c
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00001 /* Perform a `longjmp' on a Mach thread_state.  Alpha version.
00002    Copyright (C) 2002, 2006 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <hurd/signal.h>
00021 #include <setjmp.h>
00022 #include <jmpbuf-offsets.h>
00023 #include <mach/thread_status.h>
00024 
00025 
00026 /* Set up STATE to do the equivalent of `longjmp (ENV, VAL);'.  */
00027 
00028 void
00029 _hurd_longjmp_thread_state (void *state, jmp_buf env, int val)
00030 {
00031   struct alpha_thread_state *const ts = state;
00032 
00033   ts->r9 = env[0].__jmpbuf[JB_S0];
00034   ts->r10 = env[0].__jmpbuf[JB_S1];
00035   ts->r11 = env[0].__jmpbuf[JB_S2];
00036   ts->r12 = env[0].__jmpbuf[JB_S3];
00037   ts->r13 = env[0].__jmpbuf[JB_S4];
00038   ts->r13 = env[0].__jmpbuf[JB_S5];
00039   ts->pc = env[0].__jmpbuf[JB_PC];
00040   ts->r15 = env[0].__jmpbuf[JB_FP];
00041   ts->r30 = env[0].__jmpbuf[JB_SP];
00042   ts->r0 = val ?: 1;
00043 
00044   /* XXX
00045      To mimic longjmp we ought to restore some fp registers too.
00046      But those registers are in struct alpha_float_state.
00047      The only use of this is in fork, and it probably won't matter.
00048   */
00049 }