/* src/vm/jit/powerpc/darwin/md-os.c - machine dependent PowerPC Darwin functions
- Copyright (C) 1996-2005, 2006, 2007, 2008
+ Copyright (C) 1996-2005, 2006, 2007, 2008, 2009
CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
#include "threads/thread.hpp"
-#include "vm/jit/builtin.hpp"
-#include "vm/global.h"
#include "vm/signallocal.hpp"
-#include "vm/jit/asmpart.h"
+#include "vm/jit/trap.hpp"
+#if !__DARWIN_UNIX03
+#define __srr0 srr0
+#define __r0 r0
+#define __r1 r1
+#define __r13 r13
+#define __lr lr
+#define __ss ss
+#endif
-/* md_signal_handler_sigsegv ***************************************************
-
- NullPointerException signal handler for hardware null pointer
- check.
-
-*******************************************************************************/
-
+/**
+ * Signal handler for hardware-exceptions.
+ */
void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t _mc;
- ppc_thread_state_t *_ss;
- ptrint *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;
- _ss = &_mc->ss;
-
- /* immitate a gregs array */
-
- gregs = &_ss->r0;
-
- /* get register values */
-
- pv = (u1 *) _ss->r13;
- sp = (u1 *) _ss->r1;
- ra = (u1 *) _ss->lr; /* this is correct for leafs */
- xpc = (u1 *) _ss->srr0;
-
- /* get exception-throwing instruction */
-
- mcode = *((u4 *) xpc);
-
- s1 = M_INSTR_OP2_IMM_A(mcode);
- disp = M_INSTR_OP2_IMM_I(mcode);
- d = M_INSTR_OP2_IMM_D(mcode);
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t _mc = _uc->uc_mcontext;
+ ppc_thread_state_t* _ss = &(_mc->__ss);
- val = gregs[d];
+ void* xpc = (void*) _ss->__srr0;
- /* check for special-load */
-
- if (s1 == REG_ZERO) {
- /* 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
- define is 0. */
-
- addr = gregs[s1];
- type = EXCEPTION_HARDWARE_NULLPOINTER;
-
- if (addr != 0)
- vm_abort("md_signal_handler_sigsegv: faulting address is not NULL: addr=%p", addr);
- }
-
- /* Handle the type. */
-
- p = signal_handle(type, val, pv, sp, ra, xpc, _p);
-
- /* Set registers. */
-
- switch (type) {
- case EXCEPTION_HARDWARE_COMPILER:
- if (p != NULL) {
- _ss->r13 = (uintptr_t) p; /* REG_PV */
- _ss->srr0 = (uintptr_t) p;
- break;
- }
-
- /* Get and set the PV from the parent Java method. */
+ // Handle the trap.
+ trap_handle(TRAP_SIGSEGV, xpc, _p);
+}
- pv = md_codegen_get_pv_from_pc(ra);
- _ss->r13 = (uintptr_t) pv;
+/**
+ * Signal handler for hardware-traps.
+ */
+void md_signal_handler_sigtrap(int sig, siginfo_t *siginfo, void *_p)
+{
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t _mc = _uc->uc_mcontext;
+ ppc_thread_state_t* _ss = &(_mc->__ss);
- /* Get the exception object. */
+ void* xpc = (void*) _ss->__srr0;
- p = builtin_retrieve_exception();
+ // Handle the trap.
+ trap_handle(TRAP_SIGTRAP, xpc, _p);
+}
- assert(p != NULL);
- /* fall-through */
+/**
+ * Signal handler for hardware-patchers.
+ */
+void md_signal_handler_sigill(int sig, siginfo_t *siginfo, void *_p)
+{
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t _mc = _uc->uc_mcontext;
+ ppc_thread_state_t* _ss = &(_mc->__ss);
- case EXCEPTION_HARDWARE_PATCHER:
- if (p == NULL)
- break;
+ void* xpc = (void*) _ss->__srr0;
- /* fall-through */
-
- default:
- _ss->r11 = (uintptr_t) p;
- _ss->r12 = (uintptr_t) xpc;
- _ss->srr0 = (uintptr_t) asm_handle_exception;
- }
+ // Handle the trap.
+ trap_handle(TRAP_SIGILL, xpc, _p);
}
-/* md_signal_handler_sigtrap ***************************************************
+/* md_signal_handler_sigusr2 ***************************************************
- Signal handler for hardware-traps.
+ Signal handler for profiling sampling.
*******************************************************************************/
-void md_signal_handler_sigtrap(int sig, siginfo_t *siginfo, void *_p)
+void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
{
+ threadobject *t;
ucontext_t *_uc;
mcontext_t _mc;
ppc_thread_state_t *_ss;
- ptrint *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;
- _ss = &_mc->ss;
-
- /* immitate a gregs array */
-
- gregs = &_ss->r0;
-
- /* get register values */
-
- pv = (u1 *) _ss->r13;
- sp = (u1 *) _ss->r1;
- ra = (u1 *) _ss->lr; /* this is correct for leafs */
- xpc = (u1 *) _ss->srr0;
+ u1 *pc;
- /* get exception-throwing instruction */
+ t = THREADOBJECT;
- mcode = *((u4 *) xpc);
+ _uc = (ucontext_t *) _p;
+ _mc = _uc->uc_mcontext;
+ _ss = &_mc->__ss;
- s1 = M_OP3_GET_A(mcode);
+ pc = (u1 *) _ss->__srr0;
- /* for now we only handle ArrayIndexOutOfBoundsException */
+ t->pc = pc;
+}
- type = EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS;
- val = gregs[s1];
- /* Handle the type. */
+/* md_executionstate_read ******************************************************
- p = signal_handle(type, val, pv, sp, ra, xpc, _p);
+ Read the given context into an executionstate.
- /* set registers */
+*******************************************************************************/
- _ss->r11 = (intptr_t) p;
- _ss->r12 = (intptr_t) xpc;
- _ss->srr0 = (intptr_t) asm_handle_exception;
+void md_executionstate_read(executionstate_t *es, void *context)
+{
+ ucontext_t* _uc = (ucontext_t *) context;
+ mcontext_t _mc = _uc->uc_mcontext;
+ ppc_thread_state_t* _ss = &(_mc->__ss);
+
+ /* read special registers */
+ es->pc = (uint8_t*) _ss->__srr0;
+ es->sp = (uint8_t*) _ss->__r1;
+ es->pv = (uint8_t*) _ss->__r13;
+ es->ra = (uint8_t*) _ss->__lr;
+
+ /* read integer registers */
+ unsigned int* regs = &(_ss->__r0);
+ for (int i = 0; i < INT_REG_CNT; i++)
+ es->intregs[i] = regs[i];
+
+ /* read float registers */
+ for (int i = 0; i < FLT_REG_CNT; i++)
+ es->fltregs[i] = 0xdeadbeefdeadbeefULL;
}
-/* md_signal_handler_sigusr2 ***************************************************
+/* md_executionstate_write *****************************************************
- Signal handler for profiling sampling.
+ Write the given executionstate back to the context.
*******************************************************************************/
-void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
+void md_executionstate_write(executionstate_t *es, void *context)
{
- threadobject *t;
- ucontext_t *_uc;
- mcontext_t _mc;
- ppc_thread_state_t *_ss;
- u1 *pc;
-
- t = THREADOBJECT;
-
- _uc = (ucontext_t *) _p;
- _mc = _uc->uc_mcontext;
- _ss = &_mc->ss;
-
- pc = (u1 *) _ss->srr0;
-
- t->pc = pc;
+ ucontext_t* _uc = (ucontext_t *) context;
+ mcontext_t _mc = _uc->uc_mcontext;
+ ppc_thread_state_t* _ss = &(_mc->__ss);
+
+ /* write integer registers */
+ unsigned int* regs = &(_ss->__r0);
+ for (int i = 0; i < INT_REG_CNT; i++)
+ regs[i] = es->intregs[i];
+
+ /* write special registers */
+ _ss->__srr0 = (intptr_t) es->pc;
+ _ss->__r1 = (intptr_t) es->sp;
+ _ss->__r13 = (intptr_t) es->pv;
+ _ss->__lr = (intptr_t) es->ra;
}
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