1 /* src/vm/jit/powerpc64/linux/md-os.c - machine dependent PowerPC64 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 8283 2007-08-09 15:10:05Z twisti $
38 #include "vm/jit/powerpc64/codegen.h"
39 #include "vm/jit/powerpc64/linux/md-abi.h"
41 #if defined(ENABLE_THREADS)
42 # include "threads/native/threads.h"
45 #include "vm/exceptions.h"
46 #include "vm/signallocal.h"
48 #include "vm/jit/asmpart.h"
50 #if defined(ENABLE_PROFILING)
51 # include "vm/jit/optimizing/profile.h"
54 #include "vm/jit/stacktrace.h"
57 /* md_signal_handler_sigsegv ***************************************************
59 Signal handler for hardware-exceptions.
61 *******************************************************************************/
63 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
81 _uc = (ucontext_t *) _p;
82 _mc = &(_uc->uc_mcontext);
84 /* get register values */
86 pv = (u1*) _mc->gp_regs[REG_PV];
87 sp = (u1*) _mc->gp_regs[REG_SP];
88 ra = (u1*) _mc->gp_regs[PT_LNK]; /* correct for leafs */
89 xpc =(u1*) _mc->gp_regs[PT_NIP];
91 /* get the throwing instruction */
95 s1 = M_INSTR_OP2_IMM_A(mcode);
96 disp = M_INSTR_OP2_IMM_I(mcode);
97 d = M_INSTR_OP2_IMM_D(mcode);
99 val = _mc->gp_regs[d];
101 if (s1 == REG_ZERO) {
102 /* we use the exception type as load displacement */
107 addr = _mc->gp_regs[s1];
111 /* create stackframeinfo */
113 stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
115 /* Handle the type. */
117 p = signal_handle(xpc, type, val);
119 /* remove stackframeinfo */
121 stacktrace_remove_stackframeinfo(&sfi);
123 _mc->gp_regs[REG_ITMP1] = (intptr_t) p;
124 _mc->gp_regs[REG_ITMP2_XPC] = (intptr_t) xpc;
125 _mc->gp_regs[PT_NIP] = (intptr_t) asm_handle_exception;
129 /* md_signal_handler_sigusr2 ***************************************************
131 Signal handler for profiling sampling.
133 *******************************************************************************/
135 #if defined(ENABLE_THREADS)
136 void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
145 _uc = (ucontext_t *) _p;
146 _mc = &(_uc->uc_mcontext);
148 pc = (u1 *) _mc->gp_regs[PT_NIP];
155 /* md_critical_section_restart *************************************************
157 Search the critical sections tree for a matching section and set
158 the PC to the restart point, if necessary.
160 *******************************************************************************/
162 #if defined(ENABLE_THREADS)
163 void md_critical_section_restart(ucontext_t *_uc)
169 _mc = &(_uc->uc_mcontext);
171 pc = (u1 *) _mc->gp_regs[PT_NIP];
173 npc = critical_find_restart_point(pc);
176 _mc->gp_regs[PT_NIP] = (ptrint) npc;
182 * These are local overrides for various environment variables in Emacs.
183 * Please do not remove this and leave it at the end of the file, where
184 * Emacs will automagically detect them.
185 * ---------------------------------------------------------------------
188 * indent-tabs-mode: t