/* src/vm/jit/alpha/linux/md-os.c - machine dependent Alpha 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.
#include "vm/types.h"
#include "vm/jit/alpha/codegen.h"
+#include "vm/jit/alpha/md.h"
#include "vm/jit/alpha/md-abi.h"
-#if defined(ENABLE_THREADS)
-# include "threads/native/threads.h"
-#endif
+#include "threads/thread.h"
+#include "vm/builtin.h"
+#include "vm/exceptions.h"
#include "vm/signallocal.h"
#include "vm/jit/asmpart.h"
+#include "vm/jit/executionstate.h"
#include "vm/jit/stacktrace.h"
+#include "vmcore/system.h"
+
/* md_signal_handler_sigsegv ***************************************************
/* we use the exception type as load displacement */
type = disp;
+
+ if (type == EXCEPTION_HARDWARE_COMPILER) {
+ /* The XPC is the RA minus 1, because the RA points to the
+ instruction after the call. */
+
+ xpc = ra - 4;
+ }
}
else {
/* This is a normal NPE: addr must be NULL and the NPE-type
p = signal_handle(type, val, pv, sp, ra, xpc, _p);
- /* set registers */
+ /* Set registers. */
+
+ switch (type) {
+ case EXCEPTION_HARDWARE_COMPILER:
+ if (p != NULL) {
+ _mc->sc_regs[REG_PV] = (uintptr_t) p;
+ _mc->sc_pc = (uintptr_t) p;
+ break;
+ }
+
+ /* Get and set the PV from the parent Java method. */
+
+ pv = md_codegen_get_pv_from_pc(ra);
+
+ _mc->sc_regs[REG_PV] = (uintptr_t) pv;
- if (p != NULL) {
- _mc->sc_regs[REG_ITMP1_XPTR] = (intptr_t) p;
- _mc->sc_regs[REG_ITMP2_XPC] = (intptr_t) xpc;
- _mc->sc_pc = (intptr_t) asm_handle_exception;
+ /* Get the exception object. */
+
+ p = builtin_retrieve_exception();
+
+ assert(p != NULL);
+
+ /* fall-through */
+
+ case EXCEPTION_HARDWARE_PATCHER:
+ if (p == NULL)
+ break;
+
+ /* fall-through */
+
+ default:
+ _mc->sc_regs[REG_ITMP1_XPTR] = (uintptr_t) p;
+ _mc->sc_regs[REG_ITMP2_XPC] = (uintptr_t) xpc;
+ _mc->sc_pc = (uintptr_t) asm_handle_exception;
}
}
#endif
-/* md_replace_executionstate_read **********************************************
+/* md_executionstate_read ******************************************************
- Read the given context into an executionstate for Replacement.
+ Read the given context into an executionstate.
*******************************************************************************/
-#if defined(ENABLE_REPLACEMENT)
-void md_replace_executionstate_read(executionstate_t *es, void *context)
+void md_executionstate_read(executionstate_t *es, void *context)
{
ucontext_t *_uc;
mcontext_t *_mc;
- s4 i;
+ int i;
_uc = (ucontext_t *) context;
_mc = &_uc->uc_mcontext;
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];
/* read integer registers */
for (i = 0; i < INT_REG_CNT; i++)
es->intregs[i] = _mc->sc_regs[i];
/* read float registers */
- for (i = 0; i < FLT_REG_CNT; i++)
- es->fltregs[i] = _mc->sc_fpregs[i];
+ /* 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));
+ system_memcpy(&es->fltregs, &_mc->sc_fpregs, sizeof(_mc->sc_fpregs));
}
-#endif
-/* md_replace_executionstate_write *********************************************
+/* md_executionstate_write *****************************************************
- Write the given executionstate back to the context for Replacement.
+ Write the given executionstate back to the context.
*******************************************************************************/
-#if defined(ENABLE_REPLACEMENT)
-void md_replace_executionstate_write(executionstate_t *es, void *context)
+void md_executionstate_write(executionstate_t *es, void *context)
{
ucontext_t *_uc;
mcontext_t *_mc;
- s4 i;
+ int i;
_uc = (ucontext_t *) context;
_mc = &_uc->uc_mcontext;
_mc->sc_regs[i] = es->intregs[i];
/* write float registers */
- for (i = 0; i < FLT_REG_CNT; i++)
- _mc->sc_fpregs[i] = es->fltregs[i];
+ /* 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));
+ system_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
/* md_critical_section_restart *************************************************
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