1 /* src/vm/jit/powerpc64/linux/md-os.c - machine dependent PowerPC64 Linux functions
3 Copyright (C) 1996-2005, 2006, 2007, 2008
4 CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
6 This file is part of CACAO.
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License as
10 published by the Free Software Foundation; either version 2, or (at
11 your option) any later version.
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
34 #include "vm/jit/powerpc64/codegen.h"
35 #include "vm/jit/powerpc64/md.h"
36 #include "vm/jit/powerpc64/linux/md-abi.h"
38 #include "threads/thread.h"
40 #include "vm/builtin.h"
41 #include "vm/exceptions.h"
42 #include "vm/signallocal.h"
44 #include "vm/jit/asmpart.h"
46 #if defined(ENABLE_PROFILING)
47 # include "vm/jit/optimizing/profile.h"
50 #include "vm/jit/stacktrace.h"
51 #include "vm/jit/trap.h"
54 /* md_signal_handler_sigsegv ***************************************************
56 Signal handler for hardware-exceptions.
58 *******************************************************************************/
60 void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
77 _uc = (ucontext_t *) _p;
78 _mc = &(_uc->uc_mcontext);
80 /* get register values */
82 pv = (u1*) _mc->gp_regs[REG_PV];
83 sp = (u1*) _mc->gp_regs[REG_SP];
84 ra = (u1*) _mc->gp_regs[PT_LNK]; /* correct for leafs */
85 xpc =(u1*) _mc->gp_regs[PT_NIP];
87 /* get the throwing instruction */
91 s1 = M_INSTR_OP2_IMM_A(mcode);
92 disp = M_INSTR_OP2_IMM_I(mcode);
93 d = M_INSTR_OP2_IMM_D(mcode);
95 val = _mc->gp_regs[d];
98 /* We use the exception type as load displacement. */
101 if (type == TRAP_COMPILER) {
102 /* The XPC is the RA minus 1, because the RA points to the
103 instruction after the call. */
110 addr = _mc->gp_regs[s1];
114 /* Handle the trap. */
116 p = trap_handle(type, val, pv, sp, ra, xpc, _p);
123 _mc->gp_regs[REG_PV] = (uintptr_t) p;
124 _mc->gp_regs[PT_NIP] = (uintptr_t) p;
128 /* Get and set the PV from the parent Java method. */
130 pv = md_codegen_get_pv_from_pc(ra);
132 _mc->gp_regs[REG_PV] = (uintptr_t) pv;
134 /* Get the exception object. */
136 p = builtin_retrieve_exception();
149 _mc->gp_regs[REG_ITMP1_XPTR] = (uintptr_t) p;
150 _mc->gp_regs[REG_ITMP2_XPC] = (uintptr_t) xpc;
151 _mc->gp_regs[PT_NIP] = (uintptr_t) asm_handle_exception;
156 /* md_signal_handler_sigusr2 ***************************************************
158 Signal handler for profiling sampling.
160 *******************************************************************************/
162 #if defined(ENABLE_THREADS)
163 void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
172 _uc = (ucontext_t *) _p;
173 _mc = &(_uc->uc_mcontext);
175 pc = (u1 *) _mc->gp_regs[PT_NIP];
182 /* md_critical_section_restart *************************************************
184 Search the critical sections tree for a matching section and set
185 the PC to the restart point, if necessary.
187 *******************************************************************************/
189 #if defined(ENABLE_THREADS)
190 void md_critical_section_restart(ucontext_t *_uc)
196 _mc = &(_uc->uc_mcontext);
198 pc = (u1 *) _mc->gp_regs[PT_NIP];
200 npc = critical_find_restart_point(pc);
203 _mc->gp_regs[PT_NIP] = (ptrint) npc;
209 * These are local overrides for various environment variables in Emacs.
210 * Please do not remove this and leave it at the end of the file, where
211 * Emacs will automagically detect them.
212 * ---------------------------------------------------------------------
215 * indent-tabs-mode: t