/* src/vm/jit/powerpc/linux/md-os.c - machine dependent PowerPC Linux functions
- Copyright (C) 1996-2005 R. Grafl, A. Krall, C. Kruegel, C. Oates,
- R. Obermaisser, M. Platter, M. Probst, S. Ring, E. Steiner,
- C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich, J. Wenninger,
- Institut f. Computersprachen - TU Wien
+ Copyright (C) 1996-2005, 2006, 2007, 2008
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA.
-
- Contact: cacao@complang.tuwien.ac.at
-
- Authors: Christian Thalinger
-
- Changes:
-
- $Id: md-os.c 2997 2005-07-12 08:39:17Z twisti $
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
*/
+#include "config.h"
+
+#include <assert.h>
+#include <stdint.h>
#include <ucontext.h>
-#include "vm/jit/powerpc/types.h"
+#include "vm/types.h"
+
+#include "vm/jit/powerpc/codegen.h"
+#include "vm/jit/powerpc/md.h"
#include "vm/jit/powerpc/linux/md-abi.h"
+#include "threads/thread.h"
+
+#include "vm/builtin.h"
#include "vm/exceptions.h"
+#include "vm/signallocal.h"
#include "vm/stringlocal.h"
+
#include "vm/jit/asmpart.h"
+#include "vm/jit/executionstate.h"
+
+#if defined(ENABLE_PROFILING)
+# include "vm/jit/optimizing/profile.h"
+#endif
+
#include "vm/jit/stacktrace.h"
+#include "vmcore/system.h"
-/* signal_handle_sigsegv *******************************************************
- NullPointerException signal handler for hardware null pointer check.
+/* md_signal_handler_sigsegv ***************************************************
+
+ Signal handler for hardware-exceptions.
*******************************************************************************/
-void signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
+void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u4 instr;
- s4 reg;
- ptrint addr;
- u1 *pv;
- u1 *sp;
- functionptr ra;
- functionptr xpc;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pv;
+ u1 *sp;
+ u1 *ra;
+ u1 *xpc;
+ u4 mcode;
+ int s1;
+ int16_t disp;
+ int d;
+ intptr_t addr;
+ intptr_t val;
+ int type;
+ void *p;
_uc = (ucontext_t *) _p;
- _mc = _uc->uc_mcontext.uc_regs;
- instr = *((u4 *) _mc->gregs[PT_NIP]);
- reg = (instr >> 16) & 0x1f;
- addr = _mc->gregs[reg];
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ pv = (u1 *) _gregs[REG_PV];
+ sp = (u1 *) _gregs[REG_SP];
+ ra = (u1 *) _gregs[PT_LNK]; /* this is correct for leafs */
+ xpc = (u1 *) _gregs[PT_NIP];
+
+ /* get exception-throwing instruction */
+
+ mcode = *((u4 *) xpc);
+
+ s1 = M_INSTR_OP2_IMM_A(mcode);
+ disp = M_INSTR_OP2_IMM_I(mcode);
+ d = M_INSTR_OP2_IMM_D(mcode);
+
+ val = _gregs[d];
+
+ /* check for special-load */
+
+ if (s1 == REG_ZERO) {
+ /* we use the exception type as load displacement */
+
+ type = disp;
+
+ if (type == EXCEPTION_HARDWARE_COMPILER) {
+ /* The XPC is the RA minus 4, because the RA points to the
+ instruction after the call. */
+
+ xpc = ra - 4;
+ }
+ }
+ else {
+ /* This is a normal NPE: addr must be NULL and the NPE-type
+ define is 0. */
+
+ addr = _gregs[s1];
+ type = EXCEPTION_HARDWARE_NULLPOINTER;
+
+ if (addr != 0)
+ vm_abort("md_signal_handler_sigsegv: faulting address is not NULL: addr=%p", addr);
+ }
+
+ /* Handle the type. */
+
+ p = signal_handle(type, val, pv, sp, ra, xpc, _p);
+
+ /* Set registers. */
+
+ switch (type) {
+ case EXCEPTION_HARDWARE_COMPILER:
+ if (p != NULL) {
+ _gregs[REG_PV] = (uintptr_t) p;
+ _gregs[PT_NIP] = (uintptr_t) p;
+ break;
+ }
+
+ /* Get and set the PV from the parent Java method. */
+
+ pv = md_codegen_get_pv_from_pc(ra);
+
+ _gregs[REG_PV] = (uintptr_t) pv;
+
+ /* Get the exception object. */
+
+ p = builtin_retrieve_exception();
+
+ assert(p != NULL);
+
+ /* fall-through */
+
+ case EXCEPTION_HARDWARE_PATCHER:
+ if (p == NULL)
+ break;
+
+ /* fall-through */
+
+ default:
+ _gregs[REG_ITMP1_XPTR] = (uintptr_t) p;
+ _gregs[REG_ITMP2_XPC] = (uintptr_t) xpc;
+ _gregs[PT_NIP] = (uintptr_t) asm_handle_exception;
+ }
+}
+
+
+/* md_signal_handler_sigtrap ***************************************************
+
+ Signal handler for hardware-traps.
+
+*******************************************************************************/
+
+void md_signal_handler_sigtrap(int sig, siginfo_t *siginfo, void *_p)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pv;
+ u1 *sp;
+ u1 *ra;
+ u1 *xpc;
+ u4 mcode;
+ int s1;
+ intptr_t val;
+ int type;
+ void *p;
+
+ _uc = (ucontext_t *) _p;
+
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ pv = (u1 *) _gregs[REG_PV];
+ sp = (u1 *) _gregs[REG_SP];
+ ra = (u1 *) _gregs[PT_LNK]; /* this is correct for leafs */
+ xpc = (u1 *) _gregs[PT_NIP];
+
+ /* get exception-throwing instruction */
+
+ mcode = *((u4 *) xpc);
+
+ s1 = M_OP3_GET_A(mcode);
+
+ /* for now we only handle ArrayIndexOutOfBoundsException */
+
+ type = EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS;
+ val = _gregs[s1];
+
+ /* Handle the type. */
+
+ p = signal_handle(type, val, pv, sp, ra, xpc, _p);
+
+ /* set registers */
+
+ _gregs[REG_ITMP1_XPTR] = (intptr_t) p;
+ _gregs[REG_ITMP2_XPC] = (intptr_t) xpc;
+ _gregs[PT_NIP] = (intptr_t) asm_handle_exception;
+}
+
+
+/* md_signal_handler_sigusr1 ***************************************************
+
+ Signal handler for suspending threads.
+
+*******************************************************************************/
+
+#if defined(ENABLE_THREADS) && defined(ENABLE_GC_CACAO)
+void md_signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pc;
+ u1 *sp;
+
+ _uc = (ucontext_t *) _p;
+
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ /* get the PC and SP for this thread */
+
+ pc = (u1 *) _gregs[PT_NIP];
+ sp = (u1 *) _gregs[REG_SP];
+
+ /* now suspend the current thread */
+
+ threads_suspend_ack(pc, sp);
+}
+#endif
+
+
+/* md_signal_handler_sigusr2 ***************************************************
+
+ Signal handler for profiling sampling.
+
+*******************************************************************************/
+
+#if defined(ENABLE_THREADS)
+void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
+{
+ threadobject *tobj;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pc;
+
+ tobj = THREADOBJECT;
+
+ _uc = (ucontext_t *) _p;
+
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ pc = (u1 *) _gregs[PT_NIP];
+
+ tobj->pc = pc;
+}
+#endif
+
+
+/* md_executionstate_read ******************************************************
+
+ Read the given context into an executionstate.
+
+*******************************************************************************/
+
+void md_executionstate_read(executionstate_t *es, void *context)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ s4 i;
+
+ _uc = (ucontext_t *) context;
+
+#if defined(__UCLIBC__)
+#error Please port md_executionstate_read to __UCLIBC__
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ /* read special registers */
+ es->pc = (u1 *) _gregs[PT_NIP];
+ es->sp = (u1 *) _gregs[REG_SP];
+ es->pv = (u1 *) _gregs[REG_PV];
+ es->ra = (u1 *) _gregs[PT_LNK];
+
+ /* read integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ es->intregs[i] = _gregs[i];
+
+ /* read float registers */
+ /* Do not use the assignment operator '=', as the type of
+ * the _mc->fpregs[i] can cause invalid conversions. */
+
+ assert(sizeof(_mc->fpregs.fpregs) == sizeof(es->fltregs));
+ system_memcpy(&es->fltregs, &_mc->fpregs.fpregs, sizeof(_mc->fpregs.fpregs));
+}
+
+
+/* md_executionstate_write *****************************************************
+
+ Write the given executionstate back to the context.
+
+*******************************************************************************/
+
+void md_executionstate_write(executionstate_t *es, void *context)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ s4 i;
+
+ _uc = (ucontext_t *) context;
+
+#if defined(__UCLIBC__)
+#error Please port md_executionstate_write to __UCLIBC__
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ /* write integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ _gregs[i] = es->intregs[i];
+
+ /* write float registers */
+ /* Do not use the assignment operator '=', as the type of
+ * the _mc->fpregs[i] can cause invalid conversions. */
+
+ assert(sizeof(_mc->fpregs.fpregs) == sizeof(es->fltregs));
+ system_memcpy(&_mc->fpregs.fpregs, &es->fltregs, sizeof(_mc->fpregs.fpregs));
+
+ /* write special registers */
+ _gregs[PT_NIP] = (ptrint) es->pc;
+ _gregs[REG_SP] = (ptrint) es->sp;
+ _gregs[REG_PV] = (ptrint) es->pv;
+ _gregs[PT_LNK] = (ptrint) es->ra;
+}
+
+
+/* md_critical_section_restart *************************************************
+
+ Search the critical sections tree for a matching section and set
+ the PC to the restart point, if necessary.
+
+*******************************************************************************/
+
+#if defined(ENABLE_THREADS)
+void md_critical_section_restart(ucontext_t *_uc)
+{
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pc;
+ u1 *npc;
- if (addr == 0) {
- pv = (u1 *) _mc->gregs[REG_PV];
- sp = (u1 *) _mc->gregs[REG_SP];
- ra = (functionptr) _mc->gregs[PT_LNK]; /* this is correct for leafs */
- xpc = (functionptr) _mc->gregs[PT_NIP];
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
- _mc->gregs[REG_ITMP1_XPTR] =
- (ptrint) stacktrace_hardware_nullpointerexception(pv, sp, ra, xpc);
+ pc = (u1 *) _gregs[PT_NIP];
- _mc->gregs[REG_ITMP2_XPC] = (ptrint) xpc;
- _mc->gregs[PT_NIP] = (ptrint) asm_handle_exception;
+ npc = critical_find_restart_point(pc);
- } else {
- throw_cacao_exception_exit(string_java_lang_InternalError,
- "Segmentation fault: 0x%08lx at 0x%08lx",
- addr, _mc->gregs[PT_NIP]);
- }
+ if (npc != NULL)
+ _gregs[PT_NIP] = (ptrint) npc;
}
+#endif
/*
projects / cacao.git / blobdiff