Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: md-os.c 7638 2007-04-02 21:24:59Z 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.h"
#include "vm/jit/alpha/md-abi.h"
#if defined(ENABLE_THREADS)
# include "threads/native/threads.h"
#endif
+#include "vm/builtin.h"
#include "vm/exceptions.h"
#include "vm/signallocal.h"
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;
- u4 mcode;
- s4 d;
- s4 s1;
- s4 disp;
- ptrint val;
- ptrint addr;
- s4 type;
- java_objectheader *e;
+ 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;
mcode = *((u4 *) xpc);
- d = M_MEM_GET_A(mcode);
- s1 = M_MEM_GET_B(mcode);
- disp = M_MEM_GET_DISP(mcode);
+ d = M_MEM_GET_Ra(mcode);
+ s1 = M_MEM_GET_Rb(mcode);
+ disp = M_MEM_GET_Memory_disp(mcode);
- val = _mc->sc_regs[d];
+ val = _mc->sc_regs[d];
/* check for special-load */
/* 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
define is 0. */
addr = _mc->sc_regs[s1];
- type = (s4) addr;
+ type = (int) addr;
}
- /* generate appropriate exception */
+ /* Handle the type. */
+
+ p = signal_handle(type, val, pv, sp, ra, xpc, _p);
+
+ /* 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;
- e = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
+ /* Get the exception object. */
- /* set registers */
+ p = builtin_retrieve_exception();
- _mc->sc_regs[REG_ITMP1_XPTR] = (ptrint) e;
- _mc->sc_regs[REG_ITMP2_XPC] = (ptrint) xpc;
- _mc->sc_pc = (ptrint) asm_handle_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;
+ }
}
+/* 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;
+ mcontext_t *_mc;
+ u1 *pc;
+ u1 *sp;
+
+ _uc = (ucontext_t *) _p;
+ _mc = &_uc->uc_mcontext;
+
+ /* get the PC and SP for this thread */
+ pc = (u1 *) _mc->sc_pc;
+ sp = (u1 *) _mc->sc_regs[REG_SP];
+
+ /* now suspend the current thread */
+ threads_suspend_ack(pc, sp);
+}
+#endif
+
+
/* md_signal_handler_sigusr2 ***************************************************
Signal handler for profiling sampling.
#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];
+ 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 */
+ /* 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));
+ memcpy(&es->fltregs, &_mc->sc_fpregs, sizeof(_mc->sc_fpregs));
+}
+#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 */
+ /* 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));
+ 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 *************************************************
+
+ 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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