/* src/vm/jit/i386/linux/md-os.c - machine dependent i386 Linux functions
- Copyright (C) 1996-2005, 2006, 2007 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.
#include "vm/types.h"
#include "vm/jit/i386/codegen.h"
+#include "vm/jit/i386/md.h"
-#include "threads/threads-common.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"
#include "vm/jit/stacktrace.h"
void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- stackframeinfo sfi;
ucontext_t *_uc;
mcontext_t *_mc;
u1 *pv;
ptrint val;
s4 type;
void *p;
+ java_object_t *o;
_uc = (ucontext_t *) _p;
_mc = &_uc->uc_mcontext;
here. */
val = _mc->gregs[REG_EAX - d];
+
+ if (type == EXCEPTION_HARDWARE_COMPILER) {
+ /* The PV from the compiler stub is equal to the XPC. */
+
+ pv = xpc;
+
+ /* We use a framesize of zero here because the call pushed
+ the return addres onto the stack. */
+
+ ra = md_stacktrace_get_returnaddress(sp, 0);
+
+ /* Skip the RA on the stack. */
+
+ sp = sp + 1 * SIZEOF_VOID_P;
+
+ /* The XPC is the RA minus 2, because the RA points to the
+ instruction after the call. */
+
+ xpc = ra - 2;
+ }
}
else {
/* this was a normal NPE */
val = 0;
}
- /* create stackframeinfo */
-
- stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
-
/* Handle the type. */
- p = signal_handle(xpc, type, val);
+ p = signal_handle(type, val, pv, sp, ra, xpc, _p);
- /* remove stackframeinfo */
+ /* Set registers. */
- stacktrace_remove_stackframeinfo(&sfi);
+ if (type == EXCEPTION_HARDWARE_COMPILER) {
+ if (p == NULL) {
+ o = builtin_retrieve_exception();
- /* set registers */
+ _mc->gregs[REG_ESP] = (uintptr_t) sp; /* Remove RA from stack. */
- _mc->gregs[REG_EAX] = (intptr_t) p;
- _mc->gregs[REG_ECX] = (intptr_t) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_EIP] = (intptr_t) asm_handle_exception;
+ _mc->gregs[REG_EAX] = (uintptr_t) o;
+ _mc->gregs[REG_ECX] = (uintptr_t) xpc; /* REG_ITMP2_XPC */
+ _mc->gregs[REG_EIP] = (uintptr_t) asm_handle_exception;
+ }
+ else {
+ _mc->gregs[REG_EIP] = (uintptr_t) p;
+ }
+ }
+ else {
+ _mc->gregs[REG_EAX] = (intptr_t) p;
+ _mc->gregs[REG_ECX] = (intptr_t) xpc; /* REG_ITMP2_XPC */
+ _mc->gregs[REG_EIP] = (intptr_t) asm_handle_exception;
+ }
}
void md_signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
{
- stackframeinfo sfi;
ucontext_t *_uc;
mcontext_t *_mc;
u1 *pv;
type = EXCEPTION_HARDWARE_ARITHMETIC;
val = 0;
- /* create stackframeinfo */
-
- stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
-
/* Handle the type. */
- p = signal_handle(xpc, type, val);
-
- /* remove stackframeinfo */
+ p = signal_handle(type, val, pv, sp, ra, xpc, _p);
- stacktrace_remove_stackframeinfo(&sfi);
+ /* set registers */
_mc->gregs[REG_EAX] = (intptr_t) p;
_mc->gregs[REG_ECX] = (intptr_t) xpc; /* REG_ITMP2_XPC */
}
-/* 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;
- u1 *pc;
- u1 *sp;
-
- _uc = (ucontext_t *) _p;
- _mc = &_uc->uc_mcontext;
-
- /* get the PC and SP for this thread */
- pc = (u1 *) _mc->gregs[REG_EIP];
- sp = (u1 *) _mc->gregs[REG_ESP];
-
- /* now suspend the current thread */
- threads_suspend_ack(pc, sp);
-}
-#endif
-
-
/* md_signal_handler_sigill ****************************************************
Signal handler for hardware patcher traps (ud2).
void md_signal_handler_sigill(int sig, siginfo_t *siginfo, void *_p)
{
- stackframeinfo sfi;
ucontext_t *_uc;
mcontext_t *_mc;
u1 *pv;
type = EXCEPTION_HARDWARE_PATCHER;
val = 0;
- /* create stackframeinfo */
-
- stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
-
/* generate appropriate exception */
- p = signal_handle(xpc, type, val);
-
- /* remove stackframeinfo */
-
- stacktrace_remove_stackframeinfo(&sfi);
+ p = signal_handle(type, val, pv, sp, ra, xpc, _p);
/* set registers (only if exception object ready) */
}
+/* 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;
+ u1 *pc;
+ u1 *sp;
+
+ _uc = (ucontext_t *) _p;
+ _mc = &_uc->uc_mcontext;
+
+ /* get the PC and SP for this thread */
+ pc = (u1 *) _mc->gregs[REG_EIP];
+ sp = (u1 *) _mc->gregs[REG_ESP];
+
+ /* now suspend the current thread */
+ threads_suspend_ack(pc, sp);
+}
+#endif
+
+
/* md_signal_handler_sigusr2 ***************************************************
Signal handler for profiling sampling.
#endif
+/* md_executionstate_read ******************************************************
+
+ Read the given context into an executionstate for Replacement.
+
+*******************************************************************************/
+
+void md_executionstate_read(executionstate_t *es, void *context)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ s4 i;
+
+ _uc = (ucontext_t *) context;
+ _mc = &_uc->uc_mcontext;
+
+ /* read special registers */
+ es->pc = (u1 *) _mc->gregs[REG_EIP];
+ es->sp = (u1 *) _mc->gregs[REG_ESP];
+ es->pv = NULL; /* pv must be looked up via AVL tree */
+
+ /* read integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ es->intregs[i] = _mc->gregs[REG_EAX - i];
+
+ /* read float registers */
+ for (i = 0; i < FLT_REG_CNT; i++)
+ es->fltregs[i] = 0xdeadbeefdeadbeefULL;
+}
+
+
+/* md_executionstate_write *****************************************************
+
+ Write the given executionstate back to the context for Replacement.
+
+*******************************************************************************/
+
+void md_executionstate_write(executionstate_t *es, void *context)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ s4 i;
+
+ _uc = (ucontext_t *) context;
+ _mc = &_uc->uc_mcontext;
+
+ /* write integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ _mc->gregs[REG_EAX - i] = es->intregs[i];
+
+ /* write special registers */
+ _mc->gregs[REG_EIP] = (ptrint) es->pc;
+ _mc->gregs[REG_ESP] = (ptrint) es->sp;
+}
+
+
/* md_critical_section_restart *************************************************
Search the critical sections tree for a matching section and set
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