1 /* src/vm/jit/powerpc/linux/md-os.c - machine dependent PowerPC 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/powerpc/codegen.h"
37 #include "vm/jit/powerpc/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"
45 #include "vm/stringlocal.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)
66 unsigned long *_gregs;
80 _uc = (ucontext_t *) _p;
82 #if defined(__UCLIBC__)
83 _mc = &(_uc->uc_mcontext);
84 _gregs = _mc->regs->gpr;
86 _mc = _uc->uc_mcontext.uc_regs;
90 pv = (u1 *) _gregs[REG_PV];
91 sp = (u1 *) _gregs[REG_SP];
92 ra = (u1 *) _gregs[PT_LNK]; /* this is correct for leafs */
93 xpc = (u1 *) _gregs[PT_NIP];
95 /* get exception-throwing instruction */
97 mcode = *((u4 *) xpc);
99 s1 = M_INSTR_OP2_IMM_A(mcode);
100 disp = M_INSTR_OP2_IMM_I(mcode);
101 d = M_INSTR_OP2_IMM_D(mcode);
105 /* check for special-load */
107 if (s1 == REG_ZERO) {
108 /* we use the exception type as load displacement */
113 /* This is a normal NPE: addr must be NULL and the NPE-type
117 type = EXCEPTION_HARDWARE_NULLPOINTER;
120 vm_abort("md_signal_handler_sigsegv: faulting address is not NULL: addr=%p", addr);
123 /* create stackframeinfo */
125 stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
127 /* Handle the type. */
129 p = signal_handle(xpc, type, val);
131 /* remove stackframeinfo */
133 stacktrace_remove_stackframeinfo(&sfi);
135 /* set registers (only if exception object ready) */
138 _gregs[REG_ITMP1_XPTR] = (intptr_t) p;
139 _gregs[REG_ITMP2_XPC] = (intptr_t) xpc;
140 _gregs[PT_NIP] = (intptr_t) asm_handle_exception;
145 /* md_signal_handler_sigtrap ***************************************************
147 Signal handler for hardware-traps.
149 *******************************************************************************/
151 void md_signal_handler_sigtrap(int sig, siginfo_t *siginfo, void *_p)
156 unsigned long *_gregs;
167 _uc = (ucontext_t *) _p;
169 #if defined(__UCLIBC__)
170 _mc = &(_uc->uc_mcontext);
171 _gregs = _mc->regs->gpr;
173 _mc = _uc->uc_mcontext.uc_regs;
177 pv = (u1 *) _gregs[REG_PV];
178 sp = (u1 *) _gregs[REG_SP];
179 ra = (u1 *) _gregs[PT_LNK]; /* this is correct for leafs */
180 xpc = (u1 *) _gregs[PT_NIP];
182 /* get exception-throwing instruction */
184 mcode = *((u4 *) xpc);
186 s1 = M_OP3_GET_A(mcode);
188 /* for now we only handle ArrayIndexOutOfBoundsException */
190 type = EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS;
193 /* create stackframeinfo */
195 stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
197 /* Handle the type. */
199 p = signal_handle(xpc, type, val);
201 /* remove stackframeinfo */
203 stacktrace_remove_stackframeinfo(&sfi);
207 _gregs[REG_ITMP1_XPTR] = (intptr_t) p;
208 _gregs[REG_ITMP2_XPC] = (intptr_t) xpc;
209 _gregs[PT_NIP] = (intptr_t) asm_handle_exception;
213 /* md_signal_handler_sigusr2 ***************************************************
215 Signal handler for profiling sampling.
217 *******************************************************************************/
219 #if defined(ENABLE_THREADS)
220 void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
225 unsigned long *_gregs;
230 _uc = (ucontext_t *) _p;
232 #if defined(__UCLIBC__)
233 _mc = &(_uc->uc_mcontext);
234 _gregs = _mc->regs->gpr;
236 _mc = _uc->uc_mcontext.uc_regs;
240 pc = (u1 *) _gregs[PT_NIP];
247 /* md_critical_section_restart *************************************************
249 Search the critical sections tree for a matching section and set
250 the PC to the restart point, if necessary.
252 *******************************************************************************/
254 #if defined(ENABLE_THREADS)
255 void md_critical_section_restart(ucontext_t *_uc)
258 unsigned long *_gregs;
262 #if defined(__UCLIBC__)
263 _mc = &(_uc->uc_mcontext);
264 _gregs = _mc->regs->gpr;
266 _mc = _uc->uc_mcontext.uc_regs;
270 pc = (u1 *) _gregs[PT_NIP];
272 npc = critical_find_restart_point(pc);
275 _gregs[PT_NIP] = (ptrint) npc;
281 * These are local overrides for various environment variables in Emacs.
282 * Please do not remove this and leave it at the end of the file, where
283 * Emacs will automagically detect them.
284 * ---------------------------------------------------------------------
287 * indent-tabs-mode: t