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
36 #include "vm/jit/powerpc64/codegen.h"
37 #include "vm/jit/powerpc64/linux/md-abi.h"
39 #if defined(ENABLE_THREADS)
40 # include "threads/native/threads.h"
43 #include "vm/exceptions.h"
44 #include "vm/signallocal.h"
46 #include "vm/jit/asmpart.h"
48 #if defined(ENABLE_PROFILING)
49 # include "vm/jit/optimizing/profile.h"
52 #include "vm/jit/stacktrace.h"
55 /* md_signal_handler_sigsegv ***************************************************
57 Signal handler for hardware-exceptions.
59 *******************************************************************************/
61 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
79 _uc = (ucontext_t *) _p;
80 _mc = &(_uc->uc_mcontext);
82 /* get register values */
84 pv = (u1*) _mc->gp_regs[REG_PV];
85 sp = (u1*) _mc->gp_regs[REG_SP];
86 ra = (u1*) _mc->gp_regs[PT_LNK]; /* correct for leafs */
87 xpc =(u1*) _mc->gp_regs[PT_NIP];
89 /* get the throwing instruction */
93 s1 = M_INSTR_OP2_IMM_A(mcode);
94 disp = M_INSTR_OP2_IMM_I(mcode);
95 d = M_INSTR_OP2_IMM_D(mcode);
97 val = _mc->gp_regs[d];
100 /* we use the exception type as load displacement */
105 addr = _mc->gp_regs[s1];
109 /* create stackframeinfo */
111 stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
113 /* Handle the type. */
115 p = signal_handle(xpc, type, val);
117 /* remove stackframeinfo */
119 stacktrace_remove_stackframeinfo(&sfi);
121 _mc->gp_regs[REG_ITMP1] = (intptr_t) p;
122 _mc->gp_regs[REG_ITMP2_XPC] = (intptr_t) xpc;
123 _mc->gp_regs[PT_NIP] = (intptr_t) asm_handle_exception;
127 /* md_signal_handler_sigusr2 ***************************************************
129 Signal handler for profiling sampling.
131 *******************************************************************************/
133 #if defined(ENABLE_THREADS)
134 void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
143 _uc = (ucontext_t *) _p;
144 _mc = &(_uc->uc_mcontext);
146 pc = (u1 *) _mc->gp_regs[PT_NIP];
153 /* md_critical_section_restart *************************************************
155 Search the critical sections tree for a matching section and set
156 the PC to the restart point, if necessary.
158 *******************************************************************************/
160 #if defined(ENABLE_THREADS)
161 void md_critical_section_restart(ucontext_t *_uc)
167 _mc = &(_uc->uc_mcontext);
169 pc = (u1 *) _mc->gp_regs[PT_NIP];
171 npc = critical_find_restart_point(pc);
174 _mc->gp_regs[PT_NIP] = (ptrint) npc;
180 * These are local overrides for various environment variables in Emacs.
181 * Please do not remove this and leave it at the end of the file, where
182 * Emacs will automagically detect them.
183 * ---------------------------------------------------------------------
186 * indent-tabs-mode: t