/* src/vm/jit/x86_64/linux/md-os.c - machine dependent x86_64 Linux functions
- Copyright (C) 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) 2007, 2008
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: md.c 7249 2007-01-29 19:32:52Z twisti $
-
*/
#include "config.h"
#include <assert.h>
+#include <stdint.h>
#include <stdlib.h>
#include <ucontext.h>
-#if defined(ENABLE_THREADS)
-# include "threads/native/threads.h"
-#endif
+#include "vm/types.h"
-#include "vm/signallocal.h"
+#include "vm/jit/x86_64/codegen.h"
+#include "vm/jit/x86_64/md.h"
-#include "vm/jit/asmpart.h"
-#include "vm/jit/stacktrace.h"
+#include "threads/thread.hpp"
+#include "vm/signallocal.hpp"
-/* md_signal_handler_sigsegv ***************************************************
-
- NullPointerException signal handler for hardware null pointer
- check.
+#include "vm/jit/asmpart.h"
+#include "vm/jit/executionstate.h"
+#include "vm/jit/trap.hpp"
-*******************************************************************************/
+/**
+ * Signal handler for hardware exception.
+ */
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;
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t* _mc = &_uc->uc_mcontext;
/* ATTENTION: Don't use CACAO's internal REG_* defines as they are
different to the ones in <ucontext.h>. */
- sp = (u1 *) _mc->gregs[REG_RSP];
- xpc = (u1 *) _mc->gregs[REG_RIP];
- ra = xpc; /* return address is equal to xpc */
-
-#if 0
- /* check for StackOverflowException */
+ void* xpc = (void*) _mc->gregs[REG_RIP];
- threads_check_stackoverflow(sp);
-#endif
+ // Handle the trap.
+ trap_handle(TRAP_SIGSEGV, xpc, _p);
+}
- _mc->gregs[REG_RAX] =
- (ptrint) stacktrace_hardware_nullpointerexception(NULL, sp, ra, xpc);
- _mc->gregs[REG_R10] = (ptrint) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_RIP] = (ptrint) asm_handle_exception;
-}
+/**
+ * ArithmeticException signal handler for hardware divide by zero
+ * check.
+ */
+void md_signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
+{
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t* _mc = &_uc->uc_mcontext;
+ /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
+ different to the ones in <ucontext.h>. */
-/* md_signal_handler_sigfpe ****************************************************
+ void* xpc = (void*) _mc->gregs[REG_RIP];
- ArithmeticException signal handler for hardware divide by zero
- check.
+ // Handle the trap.
+ trap_handle(TRAP_SIGFPE, xpc, _p);
+}
-*******************************************************************************/
-void md_signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
+/**
+ * Signal handler for patchers.
+ */
+void md_signal_handler_sigill(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;
/* ATTENTION: Don't use CACAO's internal REG_* defines as they are
different to the ones in <ucontext.h>. */
- sp = (u1 *) _mc->gregs[REG_RSP];
- xpc = (u1 *) _mc->gregs[REG_RIP];
- ra = xpc; /* return address is equal to xpc */
+ void* xpc = (void*) _mc->gregs[REG_RIP];
- _mc->gregs[REG_RAX] =
- (ptrint) stacktrace_hardware_arithmeticexception(NULL, sp, ra, xpc);
-
- _mc->gregs[REG_R10] = (ptrint) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_RIP] = (ptrint) asm_handle_exception;
+ // Handle the trap.
+ trap_handle(TRAP_SIGILL, xpc, _p);
}
#endif
-#if defined(ENABLE_THREADS)
-void thread_restartcriticalsection(ucontext_t *_uc)
+/* 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;
- u1 *pc;
- void *critical;
+ s4 i;
+ s4 d;
+ _uc = (ucontext_t *) context;
_mc = &_uc->uc_mcontext;
- pc = _mc->gregs[REG_RIP];
+ /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
+ different to the ones in <ucontext.h>. */
+
+ /* read special registers */
+ es->pc = (u1 *) _mc->gregs[REG_RIP];
+ es->sp = (u1 *) _mc->gregs[REG_RSP];
+ es->pv = NULL;
+
+ /* read integer registers */
+ for (i = 0; i < INT_REG_CNT; i++) {
+ /* XXX FIX ME! */
+
+ switch (i) {
+ case 0: /* REG_RAX == 13 */
+ d = REG_RAX;
+ break;
+ case 1: /* REG_RCX == 14 */
+ d = REG_RCX;
+ break;
+ case 2: /* REG_RDX == 12 */
+ d = REG_RDX;
+ break;
+ case 3: /* REG_RBX == 11 */
+ d = REG_RBX;
+ break;
+ case 4: /* REG_RSP == 15 */
+ d = REG_RSP;
+ break;
+ case 5: /* REG_RBP == 10 */
+ d = REG_RBP;
+ break;
+ case 6: /* REG_RSI == 9 */
+ d = REG_RSI;
+ break;
+ case 7: /* REG_RDI == 8 */
+ d = REG_RDI;
+ break;
+ case 8: /* REG_R8 == 0 */
+ case 9: /* REG_R9 == 1 */
+ case 10: /* REG_R10 == 2 */
+ case 11: /* REG_R11 == 3 */
+ case 12: /* REG_R12 == 4 */
+ case 13: /* REG_R13 == 5 */
+ case 14: /* REG_R14 == 6 */
+ case 15: /* REG_R15 == 7 */
+ d = i - 8;
+ break;
+ }
+
+ es->intregs[i] = _mc->gregs[d];
+ }
+
+ /* read float registers */
+ for (i = 0; i < FLT_REG_CNT; i++)
+ es->fltregs[i] = 0xdeadbeefdeadbeefL;
+}
+
- critical = critical_find_restart_point();
+/* md_executionstate_write *****************************************************
- if (critical != NULL)
- _mc->gregs[REG_RIP] = (ptrint) critical;
+ Write the given executionstate back to the context.
+
+*******************************************************************************/
+
+void md_executionstate_write(executionstate_t *es, void *context)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ s4 i;
+ s4 d;
+
+ _uc = (ucontext_t *) context;
+ _mc = &_uc->uc_mcontext;
+
+ /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
+ different to the ones in <ucontext.h>. */
+
+ /* write integer registers */
+ for (i = 0; i < INT_REG_CNT; i++) {
+ /* XXX FIX ME! */
+
+ switch (i) {
+ case 0: /* REG_RAX == 13 */
+ d = REG_RAX;
+ break;
+ case 1: /* REG_RCX == 14 */
+ d = REG_RCX;
+ break;
+ case 2: /* REG_RDX == 12 */
+ d = REG_RDX;
+ break;
+ case 3: /* REG_RBX == 11 */
+ d = REG_RBX;
+ break;
+ case 4: /* REG_RSP == 15 */
+ d = REG_RSP;
+ break;
+ case 5: /* REG_RBP == 10 */
+ d = REG_RBP;
+ break;
+ case 6: /* REG_RSI == 9 */
+ d = REG_RSI;
+ break;
+ case 7: /* REG_RDI == 8 */
+ d = REG_RDI;
+ break;
+ case 8: /* REG_R8 == 0 */
+ case 9: /* REG_R9 == 1 */
+ case 10: /* REG_R10 == 2 */
+ case 11: /* REG_R11 == 3 */
+ case 12: /* REG_R12 == 4 */
+ case 13: /* REG_R13 == 5 */
+ case 14: /* REG_R14 == 6 */
+ case 15: /* REG_R15 == 7 */
+ d = i - 8;
+ break;
+ }
+
+ _mc->gregs[d] = es->intregs[i];
+ }
+
+ /* write special registers */
+ _mc->gregs[REG_RIP] = (ptrint) es->pc;
+ _mc->gregs[REG_RSP] = (ptrint) es->sp;
}
-#endif
/*