/* 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.
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: md-os.c 7925 2007-05-21 00:06:33Z michi $
-
*/
#include "config.h"
+#include <stdint.h>
#include <ucontext.h>
#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/exceptions.h"
+#include "vm/builtin.h"
#include "vm/signallocal.h"
#include "vm/stringlocal.h"
#include "vm/jit/asmpart.h"
+#include "vm/jit/executionstate.h"
#include "vm/jit/stacktrace.h"
+#include "vm/jit/trap.h"
/* md_signal_handler_sigsegv ***************************************************
void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u1 opc;
- u1 mod;
- u1 rm;
- s4 d;
- s4 disp;
- ptrint val;
- s4 type;
- java_objectheader *o;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ u1 *pv;
+ u1 *sp;
+ u1 *ra;
+ u1 *xpc;
+ u1 opc;
+ u1 mod;
+ u1 rm;
+ s4 d;
+ s4 disp;
+ 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 == TRAP_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 */
- type = EXCEPTION_HARDWARE_NULLPOINTER;
+ type = TRAP_NullPointerException;
+ val = 0;
}
- /* generate appropriate exception */
+ /* Handle the trap. */
+
+ p = trap_handle(type, val, pv, sp, ra, xpc, _p);
- o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
+ /* Set registers. */
- /* set registers */
+ if (type == TRAP_COMPILER) {
+ if (p == NULL) {
+ o = builtin_retrieve_exception();
- _mc->gregs[REG_EAX] = (ptrint) o;
- _mc->gregs[REG_ECX] = (ptrint) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_EIP] = (ptrint) asm_handle_exception;
+ _mc->gregs[REG_ESP] = (uintptr_t) sp; /* Remove RA from stack. */
+
+ _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;
+ }
+ }
+#if defined(ENABLE_REPLACEMENT)
+ else if (type == TRAP_COUNTDOWN) {
+ /* context has been written by md_replace_executionstate_write */
+ }
+#endif
+ else {
+ _mc->gregs[REG_EAX] = (uintptr_t) p;
+ _mc->gregs[REG_ECX] = (uintptr_t) xpc; /* REG_ITMP2_XPC */
+ _mc->gregs[REG_EIP] = (uintptr_t) asm_handle_exception;
+ }
}
*******************************************************************************/
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;
+ void *p;
+
+ _uc = (ucontext_t *) _p;
+ _mc = &_uc->uc_mcontext;
+
+ pv = NULL; /* is resolved during stackframeinfo creation */
+ sp = (u1 *) _mc->gregs[REG_ESP];
+ xpc = (u1 *) _mc->gregs[REG_EIP];
+ ra = xpc; /* return address is equal to xpc */
+
+ /* This is an ArithmeticException. */
+
+ type = TRAP_ArithmeticException;
+ val = 0;
+
+ /* Handle the trap. */
+
+ p = trap_handle(type, val, pv, sp, ra, xpc, _p);
+
+ /* Set registers. */
+
+ _mc->gregs[REG_EAX] = (uintptr_t) p;
+ _mc->gregs[REG_ECX] = (uintptr_t) xpc; /* REG_ITMP2_XPC */
+ _mc->gregs[REG_EIP] = (uintptr_t) asm_handle_exception;
+}
+
+
+/* md_signal_handler_sigill ****************************************************
+
+ Signal handler for hardware patcher traps (ud2).
+
+*******************************************************************************/
+
+void md_signal_handler_sigill(int sig, siginfo_t *siginfo, void *_p)
{
ucontext_t *_uc;
mcontext_t *_mc;
u1 *xpc;
s4 type;
ptrint val;
- java_objectheader *o;
+ void *p;
_uc = (ucontext_t *) _p;
_mc = &_uc->uc_mcontext;
pv = NULL; /* is resolved during stackframeinfo creation */
sp = (u1 *) _mc->gregs[REG_ESP];
xpc = (u1 *) _mc->gregs[REG_EIP];
- ra = xpc; /* return address is equal to xpc */
+ ra = xpc; /* return address is equal to xpc */
- /* this is an ArithmeticException */
-
- type = EXCEPTION_HARDWARE_ARITHMETIC;
+ type = TRAP_PATCHER;
val = 0;
- /* generate appropriate exception */
+ /* Handle the trap. */
+
+ p = trap_handle(type, val, pv, sp, ra, xpc, _p);
- o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
+ /* Set registers. */
- _mc->gregs[REG_EAX] = (ptrint) o;
- _mc->gregs[REG_ECX] = (ptrint) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_EIP] = (ptrint) asm_handle_exception;
+ if (p != NULL) {
+ _mc->gregs[REG_EAX] = (uintptr_t) p;
+ _mc->gregs[REG_ECX] = (uintptr_t) xpc; /* REG_ITMP2_XPC */
+ _mc->gregs[REG_EIP] = (uintptr_t) asm_handle_exception;
+ }
}
#endif
-/* md_critical_section_restart *************************************************
+/* md_executionstate_read ******************************************************
- Search the critical sections tree for a matching section and set
- the PC to the restart point, if necessary.
+ Read the given context into an executionstate for Replacement.
*******************************************************************************/
-#if defined(ENABLE_THREADS)
-void md_critical_section_restart(ucontext_t *_uc)
+void md_executionstate_read(executionstate_t *es, void *context)
{
- mcontext_t *_mc;
- u1 *pc;
- void *npc;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ s4 i;
+ _uc = (ucontext_t *) context;
_mc = &_uc->uc_mcontext;
- pc = (u1 *) _mc->gregs[REG_EIP];
+ /* 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 */
- npc = critical_find_restart_point(pc);
+ /* read integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ es->intregs[i] = _mc->gregs[REG_EAX - i];
- if (npc != NULL) {
- log_println("md_critical_section_restart: pc=%p, npc=%p", pc, npc);
- _mc->gregs[REG_EIP] = (ptrint) npc;
- }
+ /* 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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