Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: md-os.c 7616 2007-03-29 23:21:50Z michi $
+ $Id: md-os.c 8283 2007-08-09 15:10:05Z twisti $
*/
#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)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u4 mcode;
- s4 s1;
- s4 disp;
- s4 d;
- ptrint addr;
- ptrint val;
- s4 type;
- java_objectheader *o;
+ stackframeinfo sfi;
+ 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;
- _mc = _uc->uc_mcontext.uc_regs;
- pv = (u1 *) _mc->gregs[REG_PV];
- sp = (u1 *) _mc->gregs[REG_SP];
- ra = (u1 *) _mc->gregs[PT_LNK]; /* this is correct for leafs */
- xpc = (u1 *) _mc->gregs[PT_NIP];
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ pv = (u1 *) _gregs[REG_PV];
+ sp = (u1 *) _gregs[REG_SP];
+ ra = (u1 *) _gregs[PT_LNK]; /* this is correct for leafs */
+ xpc = (u1 *) _gregs[PT_NIP];
/* get exception-throwing instruction */
disp = M_INSTR_OP2_IMM_I(mcode);
d = M_INSTR_OP2_IMM_D(mcode);
- val = _mc->gregs[d];
+ val = _gregs[d];
/* check for special-load */
/* This is a normal NPE: addr must be NULL and the NPE-type
define is 0. */
- addr = _mc->gregs[s1];
+ addr = _gregs[s1];
+ type = EXCEPTION_HARDWARE_NULLPOINTER;
- if (addr == 0)
+ if (addr != 0)
vm_abort("md_signal_handler_sigsegv: faulting address is not NULL: addr=%p", addr);
-
- type = (s4) addr;
}
- /* generate appropriate exception */
+ /* create stackframeinfo */
- o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
+ stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
- /* set registers */
+ /* Handle the type. */
+
+ p = signal_handle(xpc, type, val);
+
+ /* remove stackframeinfo */
+
+ stacktrace_remove_stackframeinfo(&sfi);
- _mc->gregs[REG_ITMP1_XPTR] = (ptrint) o;
- _mc->gregs[REG_ITMP2_XPC] = (ptrint) xpc;
- _mc->gregs[PT_NIP] = (ptrint) asm_handle_exception;
+ /* set registers (only if exception object ready) */
+
+ if (p != NULL) {
+ _gregs[REG_ITMP1_XPTR] = (intptr_t) p;
+ _gregs[REG_ITMP2_XPC] = (intptr_t) xpc;
+ _gregs[PT_NIP] = (intptr_t) asm_handle_exception;
+ }
}
void md_signal_handler_sigtrap(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u4 mcode;
- s4 s1;
- ptrint val;
- s4 type;
- java_objectheader *o;
+ stackframeinfo sfi;
+ 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;
- _mc = _uc->uc_mcontext.uc_regs;
- pv = (u1 *) _mc->gregs[REG_PV];
- sp = (u1 *) _mc->gregs[REG_SP];
- ra = (u1 *) _mc->gregs[PT_LNK]; /* this is correct for leafs */
- xpc = (u1 *) _mc->gregs[PT_NIP];
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ pv = (u1 *) _gregs[REG_PV];
+ sp = (u1 *) _gregs[REG_SP];
+ ra = (u1 *) _gregs[PT_LNK]; /* this is correct for leafs */
+ xpc = (u1 *) _gregs[PT_NIP];
/* get exception-throwing instruction */
/* for now we only handle ArrayIndexOutOfBoundsException */
type = EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS;
- val = _mc->gregs[s1];
+ val = _gregs[s1];
+
+ /* create stackframeinfo */
+
+ stacktrace_create_extern_stackframeinfo(&sfi, pv, sp, ra, xpc);
- /* generate appropriate exception */
+ /* Handle the type. */
- o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
+ p = signal_handle(xpc, type, val);
+
+ /* remove stackframeinfo */
+
+ stacktrace_remove_stackframeinfo(&sfi);
/* set registers */
- _mc->gregs[REG_ITMP1_XPTR] = (ptrint) o;
- _mc->gregs[REG_ITMP2_XPC] = (ptrint) xpc;
- _mc->gregs[PT_NIP] = (ptrint) asm_handle_exception;
+ _gregs[REG_ITMP1_XPTR] = (intptr_t) p;
+ _gregs[REG_ITMP2_XPC] = (intptr_t) xpc;
+ _gregs[PT_NIP] = (intptr_t) asm_handle_exception;
}
#if defined(ENABLE_THREADS)
void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
{
- threadobject *tobj;
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *pc;
+ threadobject *tobj;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pc;
tobj = THREADOBJECT;
_uc = (ucontext_t *) _p;
- _mc = _uc->uc_mcontext.uc_regs;
- pc = (u1 *) _mc->gregs[PT_NIP];
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ pc = (u1 *) _gregs[PT_NIP];
tobj->pc = pc;
}
+#endif
-void thread_restartcriticalsection(ucontext_t *_uc)
-{
- mcontext_t *_mc;
- u1 *pc;
- void *critical;
+/* md_critical_section_restart *************************************************
- _mc = _uc->uc_mcontext.uc_regs;
+ Search the critical sections tree for a matching section and set
+ the PC to the restart point, if necessary.
+
+*******************************************************************************/
+
+#if defined(ENABLE_THREADS)
+void md_critical_section_restart(ucontext_t *_uc)
+{
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pc;
+ u1 *npc;
+
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
- pc = (u1 *) _mc->gregs[PT_NIP];
+ pc = (u1 *) _gregs[PT_NIP];
- critical = critical_find_restart_point(pc);
+ npc = critical_find_restart_point(pc);
- if (critical)
- _mc->gregs[PT_NIP] = (ptrint) critical;
+ if (npc != NULL)
+ _gregs[PT_NIP] = (ptrint) npc;
}
#endif
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