Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: md-os.c 8243 2007-07-31 08:57:54Z michi $
-
*/
#include "config.h"
#include <assert.h>
+#include <stdint.h>
#include <ucontext.h>
#include "vm/types.h"
void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- stackframeinfo sfi;
- ucontext_t *_uc;
- mcontext_t *_mc;
- unsigned long *_gregs;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u4 mcode;
- s4 s1;
- s4 disp;
- s4 d;
- ptrint addr;
- ptrint val;
- s4 type;
- java_objectheader *e;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pv;
+ u1 *sp;
+ u1 *ra;
+ u1 *xpc;
+ u4 mcode;
+ int s1;
+ int16_t disp;
+ int d;
+ intptr_t addr;
+ intptr_t val;
+ int type;
+ void *p;
_uc = (ucontext_t *) _p;
/* we use the exception type as load displacement */
type = disp;
+
+ if (type == EXCEPTION_HARDWARE_COMPILER) {
+ /* The XPC is the RA minus 4, 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
vm_abort("md_signal_handler_sigsegv: faulting address is not NULL: addr=%p", addr);
}
- /* create stackframeinfo */
+ /* Handle the type. */
+
+ p = signal_handle(type, val, pv, sp, ra, xpc, _p);
+
+ /* Set registers. */
- stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
+ switch (type) {
+ case EXCEPTION_HARDWARE_COMPILER:
+ if (p != NULL) {
+ _gregs[REG_PV] = (uintptr_t) p;
+ _gregs[PT_NIP] = (uintptr_t) p;
+ break;
+ }
- /* generate appropriate exception */
+ /* Get and set the PV from the parent Java method. */
- e = exceptions_new_hardware_exception(xpc, type, val);
+ pv = md_codegen_get_pv_from_pc(ra);
- /* remove stackframeinfo */
+ _gregs[REG_PV] = (uintptr_t) pv;
- stacktrace_remove_stackframeinfo(&sfi);
+ /* Get the exception object. */
- /* set registers (only if exception object ready) */
+ p = exceptions_get_and_clear_exception();
- if (e != NULL) {
- _gregs[REG_ITMP1_XPTR] = (ptrint) e;
- _gregs[REG_ITMP2_XPC] = (ptrint) xpc;
- _gregs[PT_NIP] = (ptrint) asm_handle_exception;
+ assert(p != NULL);
+
+ /* fall-through */
+
+ case EXCEPTION_HARDWARE_PATCHER:
+ if (p == NULL)
+ break;
+
+ /* fall-through */
+
+ default:
+ _gregs[REG_ITMP1_XPTR] = (uintptr_t) p;
+ _gregs[REG_ITMP2_XPC] = (uintptr_t) xpc;
+ _gregs[PT_NIP] = (uintptr_t) asm_handle_exception;
}
}
void md_signal_handler_sigtrap(int sig, siginfo_t *siginfo, void *_p)
{
- stackframeinfo sfi;
- ucontext_t *_uc;
- mcontext_t *_mc;
- unsigned long *_gregs;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u4 mcode;
- s4 s1;
- ptrint val;
- s4 type;
- java_objectheader *e;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pv;
+ u1 *sp;
+ u1 *ra;
+ u1 *xpc;
+ u4 mcode;
+ int s1;
+ intptr_t val;
+ int type;
+ void *p;
_uc = (ucontext_t *) _p;
type = EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS;
val = _gregs[s1];
- /* create stackframeinfo */
+ /* Handle the type. */
- stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
+ p = signal_handle(type, val, pv, sp, ra, xpc, _p);
- /* generate appropriate exception */
+ /* set registers */
- e = exceptions_new_hardware_exception(xpc, type, val);
+ _gregs[REG_ITMP1_XPTR] = (intptr_t) p;
+ _gregs[REG_ITMP2_XPC] = (intptr_t) xpc;
+ _gregs[PT_NIP] = (intptr_t) asm_handle_exception;
+}
- /* remove stackframeinfo */
- stacktrace_remove_stackframeinfo(&sfi);
+/* md_signal_handler_sigusr1 ***************************************************
- /* set registers */
+ Signal handler for suspending threads.
+
+*******************************************************************************/
- _gregs[REG_ITMP1_XPTR] = (ptrint) e;
- _gregs[REG_ITMP2_XPC] = (ptrint) xpc;
- _gregs[PT_NIP] = (ptrint) asm_handle_exception;
+#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;
+ unsigned long *_gregs;
+ u1 *pc;
+ u1 *sp;
+
+ _uc = (ucontext_t *) _p;
+
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ /* get the PC and SP for this thread */
+
+ pc = (u1 *) _gregs[PT_NIP];
+ sp = (u1 *) _gregs[REG_SP];
+
+ /* now suspend the current thread */
+
+ threads_suspend_ack(pc, sp);
}
+#endif
/* md_signal_handler_sigusr2 ***************************************************