Copyright (C) 1996-2005, 2006, 2007, 2008
CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
+ Copyright (C) 2008, 2009 Theobroma Systems Ltd.
This file is part of CACAO.
#include <stdint.h>
-#include "vm/types.h"
-
-#include "vm/jit/disass.h"
-
-#include "vm/jit/arm/md-abi.h"
-
#define ucontext broken_glibc_ucontext
#define ucontext_t broken_glibc_ucontext_t
#include <ucontext.h>
#define scontext_t struct sigcontext
-#include "threads/thread.h"
-
-#include "vm/exceptions.h"
-#include "vm/signallocal.h"
-#include "vm/stringlocal.h"
-#include "vm/vm.h"
+#include "vm/types.h"
-#include "vm/jit/asmpart.h"
-#include "vm/jit/stacktrace.h"
-#include "vm/jit/trap.h"
+#include "vm/jit/arm/md.h"
+#include "vm/jit/arm/md-abi.h"
+#include "threads/thread.hpp"
-/* md_signal_handler_sigsegv ***************************************************
+#include "vm/signallocal.hpp"
- Signal handler for hardware exceptions.
+#include "vm/jit/asmpart.h"
+#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;
- scontext_t *_sc;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u4 mcode;
- intptr_t addr;
- int type;
- intptr_t val;
- void *p;
-
- _uc = (ucontext_t*) _p;
- _sc = &_uc->uc_mcontext;
+ ucontext_t* _uc = (ucontext_t*) _p;
+ scontext_t* _sc = &_uc->uc_mcontext;
/* ATTENTION: glibc included messed up kernel headers we needed a
workaround for the ucontext structure. */
- pv = (u1 *) _sc->arm_ip;
- sp = (u1 *) _sc->arm_sp;
- ra = (u1 *) _sc->arm_lr; /* this is correct for leafs */
- xpc = (u1 *) _sc->arm_pc;
-
- /* get exception-throwing instruction */
-
- if (xpc == NULL)
- vm_abort("md_signal_handler_sigsegv: the program counter is NULL");
+ void* xpc = (u1 *) _sc->arm_pc;
- mcode = *((s4 *) xpc);
-
- /* This is a NullPointerException. */
-
- addr = *((s4 *) _sc + OFFSET(scontext_t, arm_r0)/4 + ((mcode >> 16) & 0x0f));
- type = addr;
- val = 0;
-
- /* Handle the trap. */
-
- p = trap_handle(type, val, pv, sp, ra, xpc, _p);
-
- /* set registers */
-
- _sc->arm_r10 = (uintptr_t) p;
- _sc->arm_fp = (uintptr_t) xpc;
- _sc->arm_pc = (uintptr_t) asm_handle_exception;
+ // Handle the trap.
+ trap_handle(TRAP_SIGSEGV, xpc, _p);
}
-/* md_signal_handler_sigill ****************************************************
-
- Illegal Instruction signal handler for hardware exception checks.
-
-*******************************************************************************/
-
+/**
+ * Illegal instruction signal handler for hardware exception checks.
+ */
void md_signal_handler_sigill(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- scontext_t *_sc;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u4 mcode;
- int type;
- intptr_t val;
- void *p;
-
- _uc = (ucontext_t*) _p;
- _sc = &_uc->uc_mcontext;
+ ucontext_t* _uc = (ucontext_t*) _p;
+ scontext_t* _sc = &_uc->uc_mcontext;
/* ATTENTION: glibc included messed up kernel headers we needed a
workaround for the ucontext structure. */
- pv = (u1 *) _sc->arm_ip;
- sp = (u1 *) _sc->arm_sp;
- ra = (u1 *) _sc->arm_lr; /* this is correct for leafs */
- xpc = (u1 *) _sc->arm_pc;
-
- /* get exception-throwing instruction */
-
- mcode = *((u4 *) xpc);
+ void* xpc = (void*) _sc->arm_pc;
- /* check for undefined instruction we use */
-
- if ((mcode & 0x0ff000f0) != 0x07f000f0) {
- log_println("md_signal_handler_sigill: unknown illegal instruction: inst=%x", mcode);
-#if defined(ENABLE_DISASSEMBLER)
- DISASSINSTR(xpc);
-#endif
- vm_abort("Aborting...");
- }
-
- type = (mcode >> 8) & 0x0fff;
- val = *((s4 *) _sc + OFFSET(scontext_t, arm_r0)/4 + (mcode & 0x0f));
-
- /* Handle the trap. */
-
- p = trap_handle(type, val, pv, sp, ra, xpc, _p);
-
- /* set registers if we have an exception, continue execution
- otherwise (this is needed for patchers to work) */
-
- if (p != NULL) {
- _sc->arm_r10 = (uintptr_t) p;
- _sc->arm_fp = (uintptr_t) xpc;
- _sc->arm_pc = (uintptr_t) asm_handle_exception;
- }
+ // Handle the trap.
+ trap_handle(TRAP_SIGILL, xpc, _p);
}
#endif
-/* md_critical_section_restart *************************************************
+/**
+ * Read the given context into an executionstate.
+ *
+ * @param es execution state
+ * @param context machine context
+ */
+void md_executionstate_read(executionstate_t *es, void *context)
+{
+ ucontext_t *_uc;
+ scontext_t *_sc;
+ int i;
- Search the critical sections tree for a matching section and set
- the PC to the restart point, if necessary.
+ _uc = (ucontext_t *) context;
+ _sc = &_uc->uc_mcontext;
-*******************************************************************************/
+ /* ATTENTION: glibc included messed up kernel headers we needed a
+ workaround for the ucontext structure. */
-#if defined(ENABLE_THREADS)
-void md_critical_section_restart(ucontext_t *_uc)
+ /* read special registers */
+
+ es->pc = (u1 *) _sc->arm_pc;
+ es->sp = (u1 *) _sc->arm_sp;
+ es->pv = (u1 *) _sc->arm_ip;
+ es->ra = (u1 *) _sc->arm_lr;
+
+ /* read integer registers */
+
+ for (i = 0; i < INT_REG_CNT; i++)
+ es->intregs[i] = *((int32_t*) _sc + OFFSET(scontext_t, arm_r0)/4 + i);
+
+ /* read float registers */
+
+ for (i = 0; i < FLT_REG_CNT; i++)
+ es->fltregs[i] = 0xdeadbeefdeadbeefULL;
+}
+
+
+/**
+ * Write the given executionstate back to the context.
+ *
+ * @param es execution state
+ * @param context machine context
+ */
+void md_executionstate_write(executionstate_t *es, void *context)
{
+ ucontext_t *_uc;
scontext_t *_sc;
- u1 *pc;
- u1 *npc;
+ int i;
+ _uc = (ucontext_t *) context;
_sc = &_uc->uc_mcontext;
- pc = (u1 *) _sc->arm_pc;
+ /* ATTENTION: glibc included messed up kernel headers we needed a
+ workaround for the ucontext structure. */
+
+ /* write integer registers */
- npc = critical_find_restart_point(pc);
+ for (i = 0; i < INT_REG_CNT; i++)
+ *((int32_t*) _sc + OFFSET(scontext_t, arm_r0)/4 + i) = es->intregs[i];
- if (npc != NULL)
- _sc->arm_pc = (ptrint) npc;
+ /* write special registers */
+
+ _sc->arm_pc = (ptrint) es->pc;
+ _sc->arm_sp = (ptrint) es->sp;
+ _sc->arm_ip = (ptrint) es->pv;
+ _sc->arm_lr = (ptrint) es->ra;
}
-#endif
/*
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