1 /* src/vm/jit/powerpc/linux/md-os.c - machine dependent PowerPC Linux functions
3 Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
4 R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
5 C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
6 Institut f. Computersprachen - TU Wien
8 This file is part of CACAO.
10 This program is free software; you can redistribute it and/or
11 modify it under the terms of the GNU General Public License as
12 published by the Free Software Foundation; either version 2, or (at
13 your option) any later version.
15 This program is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
25 Contact: cacao@complang.tuwien.ac.at
27 Authors: Christian Thalinger
31 $Id: md-os.c 2997 2005-07-12 08:39:17Z twisti $
38 #include "vm/jit/powerpc/types.h"
39 #include "vm/jit/powerpc/linux/md-abi.h"
41 #include "vm/exceptions.h"
42 #include "vm/stringlocal.h"
43 #include "vm/jit/asmpart.h"
44 #include "vm/jit/stacktrace.h"
47 /* signal_handle_sigsegv *******************************************************
49 NullPointerException signal handler for hardware null pointer check.
51 *******************************************************************************/
53 void signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
65 _uc = (ucontext_t *) _p;
66 _mc = _uc->uc_mcontext.uc_regs;
68 instr = *((u4 *) _mc->gregs[PT_NIP]);
69 reg = (instr >> 16) & 0x1f;
70 addr = _mc->gregs[reg];
73 pv = (u1 *) _mc->gregs[REG_PV];
74 sp = (u1 *) _mc->gregs[REG_SP];
75 ra = (functionptr) _mc->gregs[PT_LNK]; /* this is correct for leafs */
76 xpc = (functionptr) _mc->gregs[PT_NIP];
78 _mc->gregs[REG_ITMP1_XPTR] =
79 (ptrint) stacktrace_hardware_nullpointerexception(pv, sp, ra, xpc);
81 _mc->gregs[REG_ITMP2_XPC] = (ptrint) xpc;
82 _mc->gregs[PT_NIP] = (ptrint) asm_handle_exception;
85 throw_cacao_exception_exit(string_java_lang_InternalError,
86 "Segmentation fault: 0x%08lx at 0x%08lx",
87 addr, _mc->gregs[PT_NIP]);
93 * These are local overrides for various environment variables in Emacs.
94 * Please do not remove this and leave it at the end of the file, where
95 * Emacs will automagically detect them.
96 * ---------------------------------------------------------------------