/* 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>
#include "vm/types.h"
#include "vm/jit/x86_64/codegen.h"
+#include "vm/jit/x86_64/md.h"
-#if defined(ENABLE_THREADS)
-# include "threads/native/threads.h"
-#endif
+#include "threads/thread.hpp"
-#include "vm/exceptions.h"
-#include "vm/signallocal.h"
+#include "vm/signallocal.hpp"
#include "vm/jit/asmpart.h"
-#include "vm/jit/stacktrace.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 = (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>. */
+
+ void* xpc = (void*) _mc->gregs[REG_RIP];
+
+ // Handle the trap.
+ trap_handle(TRAP_SIGSEGV, xpc, _p);
+}
+
+/**
+ * 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;
-/* md_signal_handler_sigsegv ***************************************************
+ /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
+ different to the ones in <ucontext.h>. */
- Signal handler for hardware exception.
+ void* xpc = (void*) _mc->gregs[REG_RIP];
+
+ // Handle the trap.
+ trap_handle(TRAP_SIGFPE, xpc, _p);
+}
+
+
+/**
+ * Signal handler for patchers.
+ */
+void md_signal_handler_sigill(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>. */
+
+ void* xpc = (void*) _mc->gregs[REG_RIP];
+
+ // Handle the trap.
+ trap_handle(TRAP_SIGILL, xpc, _p);
+}
+
+
+/* md_signal_handler_sigusr2 ***************************************************
+
+ Signal handler for profiling sampling.
*******************************************************************************/
-void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
+#if defined(ENABLE_THREADS)
+void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u1 opc;
- u1 mod;
- u1 rm;
- s4 d;
- s4 disp;
- s4 type;
- ptrint val;
- java_objectheader *o;
+ threadobject *t;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ u1 *pc;
+
+ t = THREADOBJECT;
_uc = (ucontext_t *) _p;
_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 */
+ pc = (u1 *) _mc->gregs[REG_RIP];
- threads_check_stackoverflow(sp);
+ t->pc = pc;
+}
#endif
- /* get exception-throwing instruction */
- opc = M_ALD_MEM_GET_OPC(xpc);
- mod = M_ALD_MEM_GET_MOD(xpc);
- rm = M_ALD_MEM_GET_RM(xpc);
+/* md_executionstate_read ******************************************************
- /* for values see emit_mov_mem_reg and emit_mem */
+ Read the given context into an executionstate.
- if ((opc == 0x8b) && (mod == 0) && (rm == 4)) {
- /* this was a hardware-exception */
+*******************************************************************************/
- d = M_ALD_MEM_GET_REG(xpc);
- disp = M_ALD_MEM_GET_DISP(xpc);
+void md_executionstate_read(executionstate_t *es, void *context)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ s4 i;
+ s4 d;
- /* we use the exception type as load displacement */
+ _uc = (ucontext_t *) context;
+ _mc = &_uc->uc_mcontext;
- type = disp;
+ /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
+ different to the ones in <ucontext.h>. */
- /* XXX FIX ME! */
+ /* read special registers */
+ es->pc = (u1 *) _mc->gregs[REG_RIP];
+ es->sp = (u1 *) _mc->gregs[REG_RSP];
+ es->pv = NULL;
- /* ATTENTION: The _mc->gregs layout is even worse than on
- i386! See /usr/include/sys/ucontext.h. We need a
- switch-case here... */
+ /* read integer registers */
+ for (i = 0; i < INT_REG_CNT; i++) {
+ /* XXX FIX ME! */
- switch (d) {
+ switch (i) {
case 0: /* REG_RAX == 13 */
d = REG_RAX;
break;
case 13: /* REG_R13 == 5 */
case 14: /* REG_R14 == 6 */
case 15: /* REG_R15 == 7 */
- d = d - 8;
+ d = i - 8;
break;
}
- val = _mc->gregs[d];
+ es->intregs[i] = _mc->gregs[d];
}
- else {
- /* this was a normal NPE */
- type = EXCEPTION_HARDWARE_NULLPOINTER;
- val = 0;
- }
-
- /* generate appropriate exception */
-
- o = exceptions_new_hardware_exception(NULL, sp, ra, xpc, type, val);
-
- /* set registers */
-
- _mc->gregs[REG_RAX] = (ptrint) o;
- _mc->gregs[REG_R10] = (ptrint) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_RIP] = (ptrint) asm_handle_exception;
+ /* read float registers */
+ for (i = 0; i < FLT_REG_CNT; i++)
+ es->fltregs[i] = 0xdeadbeefdeadbeefL;
}
-/* md_signal_handler_sigfpe ****************************************************
+/* md_executionstate_write *****************************************************
- ArithmeticException signal handler for hardware divide by zero
- check.
+ Write the given executionstate back to the context.
*******************************************************************************/
-void md_signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
-{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- s4 type;
- ptrint val;
- java_objectheader *o;
-
- _uc = (ucontext_t *) _p;
- _mc = &_uc->uc_mcontext;
-
- /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
- different to the ones in <ucontext.h>. */
-
- pv = NULL;
- sp = (u1 *) _mc->gregs[REG_RSP];
- xpc = (u1 *) _mc->gregs[REG_RIP];
- ra = xpc; /* return address is equal to xpc */
-
- /* this is an ArithmeticException */
-
- type = EXCEPTION_HARDWARE_ARITHMETIC;
- val = 0;
-
- /* generate appropriate exception */
-
- o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
-
- /* set registers */
-
- _mc->gregs[REG_RAX] = (ptrint) o;
- _mc->gregs[REG_R10] = (ptrint) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_RIP] = (ptrint) asm_handle_exception;
-}
-
-
-/* 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 *t;
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *pc;
-
- t = THREADOBJECT;
-
- _uc = (ucontext_t *) _p;
- _mc = &_uc->uc_mcontext;
-
- /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
- different to the ones in <ucontext.h>. */
-
- pc = (u1 *) _mc->gregs[REG_RIP];
-
- t->pc = pc;
-}
-#endif
-
-
-/* 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)
+void md_executionstate_write(executionstate_t *es, void *context)
{
+ ucontext_t *_uc;
mcontext_t *_mc;
- u1 *pc;
- void *npc;
+ 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>. */
- pc = (u1 *) _mc->gregs[REG_RIP];
+ /* write integer registers */
+ for (i = 0; i < INT_REG_CNT; i++) {
+ /* XXX FIX ME! */
- npc = critical_find_restart_point(pc);
+ 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;
+ }
- if (npc != NULL) {
- log_println("md_critical_section_restart: pc=%p, npc=%p", pc, npc);
- _mc->gregs[REG_RIP] = (ptrint) npc;
+ _mc->gregs[d] = es->intregs[i];
}
+
+ /* write special registers */
+ _mc->gregs[REG_RIP] = (ptrint) es->pc;
+ _mc->gregs[REG_RSP] = (ptrint) es->sp;
}
-#endif
/*
projects / cacao.git / blobdiff