1 /* src/vm/jit/alpha/linux/md-os.c - machine dependent Alpha Linux functions
3 Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
4 C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
5 E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
6 J. Wenninger, 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., 51 Franklin Street, Fifth Floor, Boston, MA
25 $Id: md-os.c 7638 2007-04-02 21:24:59Z twisti $
37 #include "vm/jit/alpha/codegen.h"
38 #include "vm/jit/alpha/md-abi.h"
40 #if defined(ENABLE_THREADS)
41 # include "threads/native/threads.h"
44 #include "vm/exceptions.h"
45 #include "vm/signallocal.h"
47 #include "vm/jit/asmpart.h"
48 #include "vm/jit/stacktrace.h"
51 /* md_signal_handler_sigsegv ***************************************************
53 NullPointerException signal handler for hardware null pointer
56 *******************************************************************************/
58 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
75 _uc = (ucontext_t *) _p;
76 _mc = &_uc->uc_mcontext;
78 pv = (u1 *) _mc->sc_regs[REG_PV];
79 sp = (u1 *) _mc->sc_regs[REG_SP];
80 ra = (u1 *) _mc->sc_regs[REG_RA]; /* this is correct for leafs */
81 xpc = (u1 *) _mc->sc_pc;
83 /* get exception-throwing instruction */
85 mcode = *((u4 *) xpc);
87 d = M_MEM_GET_A(mcode);
88 s1 = M_MEM_GET_B(mcode);
89 disp = M_MEM_GET_DISP(mcode);
91 val = _mc->sc_regs[d];
93 /* check for special-load */
96 /* we use the exception type as load displacement */
101 /* This is a normal NPE: addr must be NULL and the NPE-type
104 addr = _mc->sc_regs[s1];
108 /* generate appropriate exception */
110 e = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
114 _mc->sc_regs[REG_ITMP1_XPTR] = (ptrint) e;
115 _mc->sc_regs[REG_ITMP2_XPC] = (ptrint) xpc;
116 _mc->sc_pc = (ptrint) asm_handle_exception;
120 /* md_signal_handler_sigusr2 ***************************************************
122 Signal handler for profiling sampling.
124 *******************************************************************************/
126 #if defined(ENABLE_THREADS)
127 void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
136 _uc = (ucontext_t *) _p;
137 _mc = &_uc->uc_mcontext;
139 pc = (u1 *) _mc->sc_pc;
146 #if defined(ENABLE_THREADS)
147 void thread_restartcriticalsection(ucontext_t *_uc)
153 _mc = &_uc->uc_mcontext;
155 pc = (u1 *) _mc->sc_pc;
157 npc = critical_find_restart_point(pc);
160 _mc->sc_pc = (ptrint) npc;
166 * These are local overrides for various environment variables in Emacs.
167 * Please do not remove this and leave it at the end of the file, where
168 * Emacs will automagically detect them.
169 * ---------------------------------------------------------------------
172 * indent-tabs-mode: t