-/* src/vm/jit/m68k/linux/md-os.c - linux specific functions
+/* src/vm/jit/m68k/linux/md-os.c - m68k linux specific functions
- Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
- C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
- E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
- J. Wenninger, Institut f. Computersprachen - TU Wien
+ Copyright (C) 1996-2005, 2006, 2007, 2008
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
*/
+
#include "config.h"
-#include "md-os.h"
-#include "md-abi.h"
+#include "vm/jit/m68k/md.h"
+#include "vm/jit/m68k/linux/md-abi.h"
+
+#include "vm/signallocal.hpp"
+#include "vm/vm.hpp"
-#include "vm/vm.h"
-#include "vm/exceptions.h"
#include "vm/jit/asmpart.h"
-#include "vm/signallocal.h"
+#include "vm/jit/trap.h"
#include <assert.h>
#include <stdlib.h>
} actual_ucontext_t;
-/*
- * linux specific initializations
- */
-void md_init_linux()
-{
- struct sigaction act;
-
- act.sa_sigaction = md_signal_handler_sigill;
- act.sa_flags = SA_NODEFER | SA_SIGINFO;
-
- if (sigaction(SIGILL, &act, NULL) == -1) {
- vm_abort("md_linux_init: Error registering signal handler");
- }
-}
/* md_signal_handler_sigsegv ******************************************
*
* Invoked when a Nullpointerexception occured, or when the vm
* crashes, hard to tell the difference.
**********************************************************************/
+
void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
uint32_t xpc, sp;
void *p;
actual_mcontext_t *_mc;
actual_ucontext_t *_uc;
-
+ int type;
_uc = (actual_ucontext_t*)_p;
_mc = &_uc->uc_mcontext;
/* val is now register number, adreg == true if it is an address regsiter */
regval = _mc->gregs[adrreg ? GREGS_ADRREG_OFF + val : val];
- /*
- if (regval != 0) {
- vm_abort("md_signal_handler_sigsegv: faulting address is not NULL: addr=%p", regval);
- }*/
-
-
- /*fprintf(stderr, "SEGV: sp=%x, xpc=%x, regval=%x\n", sp, xpc, regval);
- */
+ type = regval;
/* Handle the type. */
- p = signal_handle(EXCEPTION_HARDWARE_NULLPOINTER, regval, NULL, (void*)sp, (void*)xpc, (void*)xpc, _p);
+ p = trap_handle(type, regval, NULL, (void*)sp, (void*)xpc, (void*)xpc, _p);
_mc->gregs[GREGS_ADRREG_OFF + REG_ATMP1] = (intptr_t) p;
_mc->gregs[GREGS_ADRREG_OFF + REG_ATMP2_XPC] = (intptr_t) xpc;
_mc->gregs[R_PC] = (intptr_t) asm_handle_exception;
}
+
/* md_signal_handler_sigill *******************************************
*
* This handler is used to generate hardware exceptions.
* been created directly before the trap instruction (2 bytes long).
* the last 3 bit of this tst instruction contain the register number.
**********************************************************************/
+
void md_signal_handler_sigill(int sig, siginfo_t *siginfo, void *_p)
{
- uint32_t xpc, sp;
+ uint32_t xpc, sp, ra, pv;
uint16_t opc;
uint32_t type;
- uint32_t val, regval;
+ uint32_t regval;
void *p;
actual_mcontext_t *_mc;
actual_ucontext_t *_uc;
_uc = (actual_ucontext_t*)_p;
xpc = (uint32_t)siginfo->si_addr;
+ pv = NULL; /* we have no pv */
+ ra = xpc; /* that is ture for most cases */
+
if (siginfo->si_code == ILL_ILLOPC) {
vm_abort("md_signal_handler_sigill: the illegal instruction @ 0x%x, aborting", xpc);
}
/* Figure out in which register the object causing the exception resides for appropiate exceptions
*/
switch (type) {
- case EXCEPTION_HARDWARE_ARITHMETIC:
- case EXCEPTION_HARDWARE_EXCEPTION:
+ case TRAP_NullPointerException:
+ case TRAP_ArithmeticException:
+ case TRAP_CHECK_EXCEPTION:
/* nothing */
break;
- case EXCEPTION_HARDWARE_CLASSCAST:
+
+ case TRAP_ClassCastException:
regval = *(uint16_t*)(xpc-4);
assert( (regval&0xfff0) == 0x4a00 );
/* was in a address register */
regval = _mc->gregs[ GREGS_ADRREG_OFF + (regval & 0x7) ];
break;
- case EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS:
+
+ case TRAP_ArrayIndexOutOfBoundsException:
regval = *(uint16_t*)(xpc-4);
assert( (regval&0xfff0) == 0x4a00 );
/* was a data register */
regval = _mc->gregs[regval & 0x7];
break;
- case M68K_EXCEPTION_HARDWARE_NULLPOINTER:
- type = EXCEPTION_HARDWARE_NULLPOINTER;
+
+ case TRAP_COMPILER:
+ regval = *(uint16_t*)(xpc-4);
+ assert( (regval&0xfff0) == 0x4a00 );
+ /* was in a address register */
+ regval = _mc->gregs[ GREGS_ADRREG_OFF + (regval & 0x7) ];
+
+ pv = xpc-4; /* the compiler stub consists of 2 instructions */
+ ra = md_stacktrace_get_returnaddress(sp, 0);
+ sp = sp + SIZEOF_VOID_P;
+ xpc = ra - 2;
break;
- default: assert(0);
+ case TRAP_PATCHER:
+ xpc -= 2;
+ ra = xpc;
+ break;
}
- /*fprintf(stderr, "NEW HWE: sp=%x, xpc=%x, tpye=%x, regval=%x\n", sp, xpc, type, regval);
- */
+ /* Handle the trap. */
- /* Handle the type. */
+ p = trap_handle(type, regval, pv, (void*)sp, (void*)ra, (void*)xpc, _p);
- p = signal_handle(type, val, NULL, (void*)sp, (void*)xpc, (void*)xpc, _p);
+ switch (type) {
+ case TRAP_COMPILER:
+ if (p == NULL) {
+ /* exception when compiling the method */
+ java_object_t *o = builtin_retrieve_exception();
- _mc->gregs[GREGS_ADRREG_OFF + REG_ATMP1] = (intptr_t) p;
- _mc->gregs[GREGS_ADRREG_OFF + REG_ATMP2_XPC] = (intptr_t) xpc;
- _mc->gregs[R_PC] = (intptr_t) asm_handle_exception;
+ _mc->gregs[R_SP] = sp; /* remove RA from stack */
+
+ _mc->gregs[GREGS_ADRREG_OFF + REG_ATMP1] = (uintptr_t) o;
+ _mc->gregs[GREGS_ADRREG_OFF + REG_ATMP2_XPC] = (uintptr_t) xpc;
+ _mc->gregs[R_PC] = (uintptr_t) asm_handle_exception;
+ }
+ else {
+ /* compilation ok, execute */
+ _mc->gregs[R_PC] = p;
+ }
+ break;
+
+ case TRAP_PATCHER:
+ if (p == NULL) {
+ /* No exception while patching, continue. */
+ _mc->gregs[R_PC] = xpc;
+ return;
+ }
+ /* fall-through in case of exception */
+
+ default:
+ /* a normal exception with normal expcetion handling */
+ _mc->gregs[GREGS_ADRREG_OFF + REG_ATMP1] = (uintptr_t) p;
+ _mc->gregs[GREGS_ADRREG_OFF + REG_ATMP2_XPC] = (uintptr_t) xpc;
+ _mc->gregs[R_PC] = (uintptr_t) asm_handle_exception;
+ }
}
+
/* md_signal_handler_sigusr1 ***************************************************
Signal handler for suspending threads.
projects / cacao.git / blobdiff