-/* src/vm/jit/alpha/linux/md.c - machine dependent Alpha Linux functions
+/* src/vm/jit/alpha/linux/md-os.c - machine dependent Alpha Linux functions
- Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
+ 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
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- Contact: cacao@cacaojvm.org
-
- Authors: Christian Thalinger
-
- Changes:
-
- $Id: md-os.c 5069 2006-07-03 13:45:15Z twisti $
-
*/
#include "config.h"
#include <assert.h>
+#include <stdint.h>
#include <ucontext.h>
#include "vm/types.h"
+#include "vm/jit/alpha/codegen.h"
#include "vm/jit/alpha/md-abi.h"
-#include "vm/exceptions.h"
+#if defined(ENABLE_THREADS)
+# include "threads/native/threads.h"
+#endif
+
#include "vm/signallocal.h"
-#include "vm/stringlocal.h"
+
#include "vm/jit/asmpart.h"
#include "vm/jit/stacktrace.h"
void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u4 instr;
- ptrint addr;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
+ stackframeinfo sfi;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ u1 *pv;
+ u1 *sp;
+ u1 *ra;
+ u1 *xpc;
+ u4 mcode;
+ s4 d;
+ s4 s1;
+ s4 disp;
+ intptr_t val;
+ intptr_t addr;
+ int type;
+ void *p;
_uc = (ucontext_t *) _p;
_mc = &_uc->uc_mcontext;
- instr = *((s4 *) (_mc->sc_pc));
- addr = _mc->sc_regs[(instr >> 16) & 0x1f];
+ pv = (u1 *) _mc->sc_regs[REG_PV];
+ sp = (u1 *) _mc->sc_regs[REG_SP];
+ ra = (u1 *) _mc->sc_regs[REG_RA]; /* this is correct for leafs */
+ xpc = (u1 *) _mc->sc_pc;
- if (addr == 0) {
- pv = (u1 *) _mc->sc_regs[REG_PV];
- sp = (u1 *) _mc->sc_regs[REG_SP];
- ra = (u1 *) _mc->sc_regs[REG_RA]; /* this is correct for leafs */
- xpc = (u1 *) _mc->sc_pc;
+ /* get exception-throwing instruction */
- _mc->sc_regs[REG_ITMP1_XPTR] =
- (ptrint) stacktrace_hardware_nullpointerexception(pv, sp, ra, xpc);
+ mcode = *((u4 *) xpc);
- _mc->sc_regs[REG_ITMP2_XPC] = (ptrint) xpc;
- _mc->sc_pc = (ptrint) asm_handle_exception;
+ d = M_MEM_GET_A(mcode);
+ s1 = M_MEM_GET_B(mcode);
+ disp = M_MEM_GET_DISP(mcode);
- } else {
- addr += (long) ((instr << 16) >> 16);
+ val = _mc->sc_regs[d];
- throw_cacao_exception_exit(string_java_lang_InternalError,
- "Segmentation fault: 0x%016lx at 0x%016lx\n",
- addr, _mc->sc_pc);
+ /* check for special-load */
+
+ if (s1 == REG_ZERO) {
+ /* we use the exception type as load displacement */
+
+ type = disp;
+ }
+ else {
+ /* This is a normal NPE: addr must be NULL and the NPE-type
+ define is 0. */
+
+ addr = _mc->sc_regs[s1];
+ type = (int) addr;
+ }
+
+ /* create stackframeinfo */
+
+ stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
+
+ /* Handle the type. */
+
+ p = signal_handle(xpc, type, val);
+
+ /* remove stackframeinfo */
+
+ stacktrace_remove_stackframeinfo(&sfi);
+
+ /* set registers */
+
+ 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;
}
}
*******************************************************************************/
+#if defined(ENABLE_THREADS)
void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
{
threadobject *tobj;
tobj->pc = pc;
}
+#endif
+
+
+/* md_replace_executionstate_read **********************************************
+
+ Read the given context into an executionstate for Replacement.
+*******************************************************************************/
+
+#if defined(ENABLE_REPLACEMENT)
+void md_replace_executionstate_read(executionstate_t *es, void *context)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ s4 i;
+
+ _uc = (ucontext_t *) context;
+ _mc = &_uc->uc_mcontext;
+
+ /* 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];
+
+ /* 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];
+}
+#endif
+
+
+/* md_replace_executionstate_write *********************************************
+
+ Write the given executionstate back to the context for Replacement.
+
+*******************************************************************************/
+
+#if defined(ENABLE_REPLACEMENT)
+void md_replace_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->sc_regs[i] = es->intregs[i];
+
+ /* write float registers */
+ for (i = 0; i < FLT_REG_CNT; i++)
+ _mc->sc_fpregs[i] = es->fltregs[i];
+
+ /* write special registers */
+ _mc->sc_pc = es->pc;
+ _mc->sc_regs[REG_SP] = (ptrint) es->sp;
+ _mc->sc_regs[REG_PV] = (ptrint) es->pv;
+}
+#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 thread_restartcriticalsection(ucontext_t *_uc)
+void md_critical_section_restart(ucontext_t *_uc)
{
mcontext_t *_mc;
u1 *pc;
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