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
25 $Id: md-os.c 7864 2007-05-03 21:17:26Z twisti $
37 #include "vm/jit/powerpc/codegen.h"
38 #include "vm/jit/powerpc/linux/md-abi.h"
40 #if defined(ENABLE_THREADS)
41 # include "threads/native/threads.h"
44 #include "vm/exceptions.h"
45 #include "vm/signallocal.h"
46 #include "vm/stringlocal.h"
47 #include "vm/jit/asmpart.h"
49 #if defined(ENABLE_PROFILING)
50 # include "vm/jit/optimizing/profile.h"
53 #include "vm/jit/stacktrace.h"
56 /* md_signal_handler_sigsegv ***************************************************
58 Signal handler for hardware-exceptions.
60 *******************************************************************************/
62 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 /* generate appropriate exception */
125 o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
129 _gregs[REG_ITMP1_XPTR] = (ptrint) o;
130 _gregs[REG_ITMP2_XPC] = (ptrint) xpc;
131 _gregs[PT_NIP] = (ptrint) asm_handle_exception;
135 /* md_signal_handler_sigtrap ***************************************************
137 Signal handler for hardware-traps.
139 *******************************************************************************/
141 void md_signal_handler_sigtrap(int sig, siginfo_t *siginfo, void *_p)
145 unsigned long *_gregs;
154 java_objectheader *o;
156 _uc = (ucontext_t *) _p;
158 #if defined(__UCLIBC__)
159 _mc = &(_uc->uc_mcontext);
160 _gregs = _mc->regs->gpr;
162 _mc = _uc->uc_mcontext.uc_regs;
166 pv = (u1 *) _gregs[REG_PV];
167 sp = (u1 *) _gregs[REG_SP];
168 ra = (u1 *) _gregs[PT_LNK]; /* this is correct for leafs */
169 xpc = (u1 *) _gregs[PT_NIP];
171 /* get exception-throwing instruction */
173 mcode = *((u4 *) xpc);
175 s1 = M_OP3_GET_A(mcode);
177 /* for now we only handle ArrayIndexOutOfBoundsException */
179 type = EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS;
182 /* generate appropriate exception */
184 o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
188 _gregs[REG_ITMP1_XPTR] = (ptrint) o;
189 _gregs[REG_ITMP2_XPC] = (ptrint) xpc;
190 _gregs[PT_NIP] = (ptrint) asm_handle_exception;
194 /* md_signal_handler_sigusr2 ***************************************************
196 Signal handler for profiling sampling.
198 *******************************************************************************/
200 #if defined(ENABLE_THREADS)
201 void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
206 unsigned long *_gregs;
211 _uc = (ucontext_t *) _p;
213 #if defined(__UCLIBC__)
214 _mc = &(_uc->uc_mcontext);
215 _gregs = _mc->regs->gpr;
217 _mc = _uc->uc_mcontext.uc_regs;
221 pc = (u1 *) _gregs[PT_NIP];
227 /* md_critical_section_restart *************************************************
229 Search the critical sections tree for a matching section and set
230 the PC to the restart point, if necessary.
232 *******************************************************************************/
234 void md_critical_section_restart(ucontext_t *_uc)
237 unsigned long *_gregs;
241 #if defined(__UCLIBC__)
242 _mc = &(_uc->uc_mcontext);
243 _gregs = _mc->regs->gpr;
245 _mc = _uc->uc_mcontext.uc_regs;
249 pc = (u1 *) _gregs[PT_NIP];
251 npc = critical_find_restart_point(pc);
254 log_println("md_critical_section_restart: pc=%p, npc=%p", pc, npc);
256 _gregs[PT_NIP] = (ptrint) npc;
263 * These are local overrides for various environment variables in Emacs.
264 * Please do not remove this and leave it at the end of the file, where
265 * Emacs will automagically detect them.
266 * ---------------------------------------------------------------------
269 * indent-tabs-mode: t