/* src/vm/jit/i386/linux/md-os.c - machine dependent i386 Linux functions
- Copyright (C) 1996-2005, 2006 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
+ Copyright (C) 2009 Theobroma Systems Ltd.
This file is part of CACAO.
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- Contact: cacao@cacaojvm.org
-
- Authors: Christian Thalinger
-
- Changes:
-
- $Id: md-os.c 7482 2007-03-08 13:16:34Z michi $
-
*/
#include "config.h"
+#include <stdint.h>
#include <ucontext.h>
#include "vm/types.h"
-#if defined(ENABLE_GC_CACAO)
-# include "mm/cacao-gc/gc.h"
-#endif
-
-#include "vm/exceptions.h"
-#include "vm/signallocal.h"
-#include "vm/stringlocal.h"
-#include "vm/jit/asmpart.h"
-#include "vm/jit/stacktrace.h"
+#include "vm/jit/i386/codegen.h"
+#include "vm/jit/i386/md.h"
+#include "threads/thread.hpp"
-/* md_signal_handler_sigsegv ***************************************************
+#include "vm/signallocal.hpp"
- NullPointerException signal handler for hardware null pointer
- check.
+#include "vm/jit/executionstate.h"
+#include "vm/jit/trap.hpp"
-*******************************************************************************/
+/**
+ * Signal handler for hardware exceptions.
+ */
void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
-
- _uc = (ucontext_t *) _p;
- _mc = &_uc->uc_mcontext;
-
- sp = (u1 *) _mc->gregs[REG_ESP];
- xpc = (u1 *) _mc->gregs[REG_EIP];
- ra = xpc; /* return address is equal to xpc */
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t* _mc = &_uc->uc_mcontext;
- _mc->gregs[REG_EAX] =
- (ptrint) stacktrace_hardware_nullpointerexception(NULL, sp, ra, xpc);
+ void* xpc = (void*) _mc->gregs[REG_EIP];
- _mc->gregs[REG_ECX] = (ptrint) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_EIP] = (ptrint) asm_handle_exception;
+ // Handle the trap.
+ trap_handle(TRAP_SIGSEGV, xpc, _p);
}
-/* md_signal_handler_sigfpe ****************************************************
-
- ArithmeticException signal handler for hardware divide by zero
- check.
-
-*******************************************************************************/
-
+/**
+ * Signal handler for hardware divide by zero (ArithmeticException)
+ * check.
+ */
void md_signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
-
- _uc = (ucontext_t *) _p;
- _mc = &_uc->uc_mcontext;
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t* _mc = &_uc->uc_mcontext;
- sp = (u1 *) _mc->gregs[REG_ESP];
- xpc = (u1 *) _mc->gregs[REG_EIP];
- ra = xpc; /* return address is equal to xpc */
+ void* xpc = (void*) _mc->gregs[REG_EIP];
- _mc->gregs[REG_EAX] =
- (ptrint) stacktrace_hardware_arithmeticexception(NULL, sp, ra, xpc);
-
- _mc->gregs[REG_ECX] = (ptrint) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_EIP] = (ptrint) asm_handle_exception;
+ // Handle the trap.
+ trap_handle(TRAP_SIGFPE, xpc, _p);
}
-/* md_signal_handler_sigusr1 ***************************************************
-
- Signale handler the exact GC to suspend threads.
-
-*******************************************************************************/
-
-#if defined(ENABLE_THREADS) && defined(ENABLE_GC_CACAO)
-void md_signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p)
+/**
+ * Signal handler for hardware patcher traps (ud2).
+ */
+void md_signal_handler_sigill(int sig, siginfo_t *siginfo, void *_p)
{
- threadobject *t;
- ucontext_t *_uc;
- mcontext_t *_mc;
-
- t = THREADOBJECT;
-
- _uc = (ucontext_t *) _p;
- _mc = &_uc->uc_mcontext;
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t* _mc = &_uc->uc_mcontext;
- /* assume there is a GC pending */
- assert(gc_pending);
+ void* xpc = (void*) _mc->gregs[REG_EIP];
- /* fill in the PC for this thread */
- t->pc = (u1 *) _mc->gregs[REG_EIP];
-
- /* now suspend the current thread for GC */
- gc_suspend(t, _uc);
+ // Handle the trap.
+ trap_handle(TRAP_SIGILL, xpc, _p);
}
-#endif
/* md_signal_handler_sigusr2 ***************************************************
#endif
-#if defined(ENABLE_THREADS)
-void thread_restartcriticalsection(ucontext_t *uc)
+/* md_executionstate_read ******************************************************
+
+ Read the given context into an executionstate for Replacement.
+
+*******************************************************************************/
+
+void md_executionstate_read(executionstate_t *es, void *context)
{
- void *critical;
+ 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 */
- critical = critical_find_restart_point((void *) uc->uc_mcontext.gregs[REG_EIP]);
+ /* read integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ es->intregs[i] = _mc->gregs[REG_EAX - i];
- if (critical)
- uc->uc_mcontext.gregs[REG_EIP] = (ptrint) critical;
+ /* 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;
}
-#endif
/*
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