-/* src/vm/jit/arm/linux/md-os.c - machine dependent arm linux functions
+/* src/vm/jit/arm/linux/md-os.c - machine dependent ARM 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.c 166 2006-01-22 23:38:44Z twisti $
-
*/
#include "config.h"
-#include <assert.h>
+#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 scontext_t struct sigcontext
-#if defined(ENABLE_THREADS)
-# include "threads/native/threads.h"
-#endif
+#include "threads/thread.hpp"
-#include "vm/exceptions.h"
+#include "vm/os.hpp"
#include "vm/signallocal.h"
-#include "vm/stringlocal.h"
+#include "vm/vm.hpp"
#include "vm/jit/asmpart.h"
-#include "vm/jit/stacktrace.h"
+#include "vm/jit/executionstate.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;
- scontext_t *_sc;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u4 mcode;
- ptrint addr;
- s4 type;
- ptrint val;
- java_objectheader *o;
+ 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;
/* get exception-throwing instruction */
+ if (xpc == NULL)
+ vm_abort("md_signal_handler_sigsegv: the program counter is NULL");
+
mcode = *((s4 *) xpc);
- /* this is a NullPointerException */
+ /* This is a NullPointerException. */
-/* addr = _mc->gregs[s1]; */
addr = *((s4 *) _sc + OFFSET(scontext_t, arm_r0)/4 + ((mcode >> 16) & 0x0f));
- type = EXCEPTION_HARDWARE_NULLPOINTER;
+ type = addr;
val = 0;
- if (addr != 0)
- vm_abort("md_signal_handler_sigsegv: faulting address is not NULL: addr=%p", addr);
-
- /* generate appropriate exception */
+ /* Handle the trap. */
- o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
+ p = trap_handle(type, val, pv, sp, ra, xpc, _p);
/* set registers */
- _sc->arm_r10 = (ptrint) o;
- _sc->arm_fp = (ptrint) xpc;
- _sc->arm_pc = (ptrint) asm_handle_exception;
+ _sc->arm_r10 = (uintptr_t) p;
+ _sc->arm_fp = (uintptr_t) xpc;
+ _sc->arm_pc = (uintptr_t) asm_handle_exception;
}
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;
- s4 type;
- ptrint val;
- java_objectheader *o;
+ 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;
/* check for undefined instruction we use */
- if ((mcode & 0x0ff000f0) != 0x07f000f0)
- vm_abort("md_signal_handler_sigill: unknown illegal instruction");
+ 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));
- /* generate appropriate exception */
+ /* Handle the trap. */
- o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
+ p = trap_handle(type, val, pv, sp, ra, xpc, _p);
- /* set registers */
+ /* 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;
+ }
+}
+
+
+/* md_signal_handler_sigusr1 ***************************************************
+
+ Signal handler for suspending threads.
+
+*******************************************************************************/
+
+#if defined(ENABLE_THREADS) && defined(ENABLE_GC_CACAO)
+void md_signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p)
+{
+ ucontext_t *_uc;
+ scontext_t *_sc;
+ u1 *pc;
+ u1 *sp;
+
+ _uc = (ucontext_t *) _p;
+ _sc = &_uc->uc_mcontext;
+
+ /* get the PC and SP for this thread */
+ pc = (u1 *) _sc->arm_pc;
+ sp = (u1 *) _sc->arm_sp;
- _sc->arm_r10 = (ptrint) o;
- _sc->arm_fp = (ptrint) xpc;
- _sc->arm_pc = (ptrint) asm_handle_exception;
+ /* now suspend the current thread */
+ threads_suspend_ack(pc, sp);
}
+#endif
/* md_signal_handler_sigusr2 ***************************************************
#endif
-/* thread_restartcriticalsection ***********************************************
+/**
+ * Read the given context into an executionstate.
+ *
+ * @param es execution state
+ * @param context machine context
+ */
+void md_executionstate_read(executionstate_t *es, void *context)
+{
+ vm_abort("md_executionstate_read: IMPLEMENT ME!");
- TODO: document me
+#if 0
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ int i;
-*******************************************************************************/
+ _uc = (ucontext_t *) context;
+ _mc = &_uc->uc_mcontext;
-#if defined(ENABLE_THREADS)
-void thread_restartcriticalsection(ucontext_t *_uc)
-{
- scontext_t *_sc;
- void *critical;
+ /* read special registers */
+ es->pc = (u1 *) _mc->sc_pc;
+ es->sp = (u1 *) _mc->sc_regs[REG_SP];
+ es->pv = (u1 *) _mc->sc_regs[REG_PV];
+ es->ra = (u1 *) _mc->sc_regs[REG_RA];
- _sc = &_uc->uc_mcontext;
+ /* read integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ es->intregs[i] = _mc->sc_regs[i];
- critical = critical_find_restart_point((void *) _sc->arm_pc);
+ /* read float registers */
+ /* Do not use the assignment operator '=', as the type of
+ * the _mc->sc_fpregs[i] can cause invalid conversions. */
- if (critical)
- _sc->arm_pc = (ptrint) critical;
+ assert(sizeof(_mc->sc_fpregs) == sizeof(es->fltregs));
+ os_memcpy(&es->fltregs, &_mc->sc_fpregs, sizeof(_mc->sc_fpregs));
+#endif
}
+
+
+/**
+ * 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)
+{
+ vm_abort("md_executionstate_write: IMPLEMENT ME!");
+
+#if 0
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ int i;
+
+ _uc = (ucontext_t *) context;
+ _mc = &_uc->uc_mcontext;
+
+ /* write integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ _mc->sc_regs[i] = es->intregs[i];
+
+ /* write float registers */
+ /* Do not use the assignment operator '=', as the type of
+ * the _mc->sc_fpregs[i] can cause invalid conversions. */
+
+ assert(sizeof(_mc->sc_fpregs) == sizeof(es->fltregs));
+ os_memcpy(&_mc->sc_fpregs, &es->fltregs, sizeof(_mc->sc_fpregs));
+
+ /* write special registers */
+ _mc->sc_pc = (ptrint) es->pc;
+ _mc->sc_regs[REG_SP] = (ptrint) es->sp;
+ _mc->sc_regs[REG_PV] = (ptrint) es->pv;
+ _mc->sc_regs[REG_RA] = (ptrint) es->ra;
#endif
+}
/*
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