1 /* src/vm/jit/alpha/freebsd/md-os.c - machine dependent Alpha FreeBSD functions
3 Copyright (C) 1996-2005, 2006, 2008
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
30 #include <sys/types.h> /* required by <machine/reg.h> */
31 #include <machine/reg.h>
35 #include "vm/jit/alpha/md-abi.h"
37 #include "vm/global.h"
38 #include "vm/signallocal.h"
39 #include "vm/jit/asmpart.h"
42 /* md_signal_handler_sigsegv ***************************************************
44 NullPointerException signal handler for hardware null pointer
47 *******************************************************************************/
49 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
60 _uc = (ucontext_t *) _p;
61 _mc = &_uc->uc_mcontext;
63 instr = *((s4 *) (_mc->mc_regs[R_PC]));
64 addr = _mc->mc_regs[(instr >> 16) & 0x1f];
67 pv = (u1 *) _mc->mc_regs[REG_PV];
68 sp = (u1 *) _mc->mc_regs[REG_SP];
69 ra = (u1 *) _mc->mc_regs[REG_RA]; /* this is correct for leafs */
70 xpc = (u1 *) _mc->mc_regs[R_PC];
72 _mc->mc_regs[REG_ITMP1_XPTR] =
73 (ptrint) stacktrace_hardware_nullpointerexception(pv, sp, ra, xpc);
75 _mc->mc_regs[REG_ITMP2_XPC] = (ptrint) xpc;
76 _mc->mc_regs[R_PC] = (ptrint) asm_handle_exception;
79 addr += (long) ((instr << 16) >> 16);
81 throw_cacao_exception_exit(string_java_lang_InternalError,
82 "Segmentation fault: 0x%016lx at 0x%016lx\n",
83 addr, _mc->mc_regs[R_PC]);
89 * These are local overrides for various environment variables in Emacs.
90 * Please do not remove this and leave it at the end of the file, where
91 * Emacs will automagically detect them.
92 * ---------------------------------------------------------------------