void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- stackframeinfo sfi;
ucontext_t *_uc;
mcontext_t *_mc;
u1 *sp;
int type;
intptr_t val;
void *p;
+ java_handle_t *o;
_uc = (ucontext_t *) _p;
_mc = &_uc->uc_mcontext;
}
val = _mc->gregs[d];
+
+ if (type == EXCEPTION_HARDWARE_COMPILER) {
+ /* We use a framesize of zero here because the call pushed
+ the return addres onto the stack. */
+
+ ra = md_stacktrace_get_returnaddress(sp, 0);
+
+ /* And remove the RA from the stack. */
+
+ sp = sp + 1 * SIZEOF_VOID_P;
+ }
}
else {
/* this was a normal NPE */
val = 0;
}
- /* create stackframeinfo */
-
- stacktrace_create_extern_stackframeinfo(&sfi, NULL, sp, ra, xpc);
-
/* Handle the type. */
- p = signal_handle(xpc, type, val);
+ p = signal_handle(type, val, NULL, sp, ra, xpc, _p);
- /* remove stackframeinfo */
+ /* Set registers. */
- stacktrace_remove_stackframeinfo(&sfi);
+ if (type == EXCEPTION_HARDWARE_COMPILER) {
+ if (p == NULL) {
+ o = exceptions_get_and_clear_exception();
- /* set registers */
+ ra = ra - 3; /* XPC is before the actual call */
- _mc->gregs[REG_RAX] = (intptr_t) p;
- _mc->gregs[REG_R10] = (intptr_t) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_RIP] = (intptr_t) asm_handle_exception;
+ _mc->gregs[REG_RSP] = (uintptr_t) sp; /* Remove RA from stack. */
+
+ _mc->gregs[REG_RAX] = (uintptr_t) o;
+ _mc->gregs[REG_R10] = (uintptr_t) ra; /* REG_ITMP2_XPC */
+ _mc->gregs[REG_RIP] = (uintptr_t) asm_handle_exception;
+ }
+ else {
+ _mc->gregs[REG_RIP] = (uintptr_t) p;
+ }
+ }
+ else {
+ _mc->gregs[REG_RAX] = (uintptr_t) p;
+ _mc->gregs[REG_R10] = (uintptr_t) xpc; /* REG_ITMP2_XPC */
+ _mc->gregs[REG_RIP] = (uintptr_t) asm_handle_exception;
+ }
}
void md_signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
{
- stackframeinfo sfi;
ucontext_t *_uc;
mcontext_t *_mc;
u1 *pv;
type = EXCEPTION_HARDWARE_ARITHMETIC;
val = 0;
- /* 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);
+ p = signal_handle(type, val, pv, sp, ra, xpc, _p);
/* set registers */
}
+/* md_signal_handler_sigill ****************************************************
+
+ Signal handler for patchers.
+
+*******************************************************************************/
+
+void md_signal_handler_sigill(int sig, siginfo_t *siginfo, void *_p)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ u1 *pv;
+ u1 *sp;
+ u1 *ra;
+ u1 *xpc;
+ int type;
+ intptr_t val;
+ void *p;
+
+ _uc = (ucontext_t *) _p;
+ _mc = &_uc->uc_mcontext;
+
+ /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
+ different to the ones in <ucontext.h>. */
+
+ pv = NULL;
+ sp = (u1 *) _mc->gregs[REG_RSP];
+ xpc = (u1 *) _mc->gregs[REG_RIP];
+ ra = xpc; /* return address is equal to xpc */
+
+ /* This is a patcher. */
+
+ type = EXCEPTION_HARDWARE_PATCHER;
+ val = 0;
+
+ /* Handle the type. */
+
+ p = signal_handle(type, val, pv, sp, ra, xpc, _p);
+
+ /* set registers */
+
+ if (p != NULL) {
+ _mc->gregs[REG_RAX] = (intptr_t) p;
+ _mc->gregs[REG_R10] = (intptr_t) xpc; /* REG_ITMP2_XPC */
+ _mc->gregs[REG_RIP] = (intptr_t) asm_handle_exception;
+ }
+}
+
+
/* md_signal_handler_sigusr1 ***************************************************
Signal handler for suspending threads.
#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;
+ s4 d;
+
+ _uc = (ucontext_t *) context;
+ _mc = &_uc->uc_mcontext;
+
+ /* read special registers */
+ es->pc = (u1 *) _mc->gregs[REG_RSP];
+ es->sp = (u1 *) _mc->gregs[REG_RSP];
+ es->pv = NULL;
+
+ /* read integer registers */
+ for (i = 0; i < INT_REG_CNT; i++) {
+ /* XXX FIX ME! */
+
+ switch (i) {
+ case 0: /* REG_RAX == 13 */
+ d = REG_RAX;
+ break;
+ case 1: /* REG_RCX == 14 */
+ d = REG_RCX;
+ break;
+ case 2: /* REG_RDX == 12 */
+ d = REG_RDX;
+ break;
+ case 3: /* REG_RBX == 11 */
+ d = REG_RBX;
+ break;
+ case 4: /* REG_RSP == 15 */
+ d = REG_RSP;
+ break;
+ case 5: /* REG_RBP == 10 */
+ d = REG_RBP;
+ break;
+ case 6: /* REG_RSI == 9 */
+ d = REG_RSI;
+ break;
+ case 7: /* REG_RDI == 8 */
+ d = REG_RDI;
+ break;
+ case 8: /* REG_R8 == 0 */
+ case 9: /* REG_R9 == 1 */
+ case 10: /* REG_R10 == 2 */
+ case 11: /* REG_R11 == 3 */
+ case 12: /* REG_R12 == 4 */
+ case 13: /* REG_R13 == 5 */
+ case 14: /* REG_R14 == 6 */
+ case 15: /* REG_R15 == 7 */
+ d = i - 8;
+ break;
+ }
+
+ es->intregs[i] = _mc->gregs[d];
+ }
+
+ /* read float registers */
+ for (i = 0; i < FLT_REG_CNT; i++)
+ es->fltregs[i] = 0xdeadbeefdeadbeefL;
+}
+#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;
+ s4 d;
+
+ _uc = (ucontext_t *) context;
+ _mc = &_uc->uc_mcontext;
+
+ /* write integer registers */
+ for (i = 0; i < INT_REG_CNT; i++) {
+ /* XXX FIX ME! */
+
+ switch (i) {
+ case 0: /* REG_RAX == 13 */
+ d = REG_RAX;
+ break;
+ case 1: /* REG_RCX == 14 */
+ d = REG_RCX;
+ break;
+ case 2: /* REG_RDX == 12 */
+ d = REG_RDX;
+ break;
+ case 3: /* REG_RBX == 11 */
+ d = REG_RBX;
+ break;
+ case 4: /* REG_RSP == 15 */
+ d = REG_RSP;
+ break;
+ case 5: /* REG_RBP == 10 */
+ d = REG_RBP;
+ break;
+ case 6: /* REG_RSI == 9 */
+ d = REG_RSI;
+ break;
+ case 7: /* REG_RDI == 8 */
+ d = REG_RDI;
+ break;
+ case 8: /* REG_R8 == 0 */
+ case 9: /* REG_R9 == 1 */
+ case 10: /* REG_R10 == 2 */
+ case 11: /* REG_R11 == 3 */
+ case 12: /* REG_R12 == 4 */
+ case 13: /* REG_R13 == 5 */
+ case 14: /* REG_R14 == 6 */
+ case 15: /* REG_R15 == 7 */
+ d = i - 8;
+ break;
+ }
+
+ _mc->gregs[d] = es->intregs[i];
+ }
+
+ /* write special registers */
+ _mc->gregs[REG_RIP] = (ptrint) es->pc;
+ _mc->gregs[REG_RSP] = (ptrint) es->sp;
+}
+#endif
+
+
/* md_critical_section_restart *************************************************
Search the critical sections tree for a matching section and set
projects / cacao.git / blobdiff