/* src/vm/jit/mips/linux/md-os.c - machine dependent MIPS Linux functions
- Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
+ 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
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- Contact: cacao@cacaojvm.org
-
- Authors: Andreas Krall
- Reinhard Grafl
-
- Changes: Christian Thalinger
-
- $Id: md-os.c 5900 2006-11-04 17:30:44Z michi $
+ $Id: md-os.c 8299 2007-08-13 08:41:18Z michi $
*/
#include "config.h"
#include <assert.h>
+#include <sgidefs.h> /* required for _MIPS_SIM_ABI* defines (before signal.h) */
#include <signal.h>
+#include <stdint.h>
#include <ucontext.h>
#include "vm/types.h"
+#include "vm/jit/mips/codegen.h"
#include "vm/jit/mips/md-abi.h"
#include "mm/gc-common.h"
-#include "vm/exceptions.h"
+
#include "vm/signallocal.h"
-#include "vm/stringlocal.h"
+
#include "vm/jit/asmpart.h"
#include "vm/jit/stacktrace.h"
/* dummy allocation here to ensure that the GC is initialized. */
#if defined(ENABLE_GC_BOEHM)
- heap_allocate(1, 0, NULL);
+ (void) GCNEW(u1);
#endif
#if 0
void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- greg_t *_gregs;
- u4 instr;
- ptrint addr;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
+ stackframeinfo sfi;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ greg_t *_gregs;
+ u1 *pv;
+ u1 *sp;
+ u1 *ra;
+ u1 *xpc;
+ unsigned int cause;
+ u4 mcode;
+ int d;
+ int s1;
+ int16_t disp;
+ intptr_t val;
+ intptr_t addr;
+ int type;
+ void *p;
_uc = (struct ucontext *) _p;
_mc = &_uc->uc_mcontext;
sp = (u1 *) (ptrint) _gregs[REG_SP];
ra = (u1 *) (ptrint) _gregs[REG_RA]; /* this is correct for leafs */
-#if defined(__UCLIBC__)
- xpc = (u1 *) (ptrint) _gregs[CTX_EPC];
-#else
+#if !defined(__UCLIBC__) && ((__GLIBC__ == 2) && (__GLIBC_MINOR__ < 5))
+ /* NOTE: We only need this for pre glibc-2.5. */
+
xpc = (u1 *) (ptrint) _mc->pc;
+
+ /* get the cause of this exception */
+
+ cause = _mc->cause;
+
+ /* check the cause to find the faulting instruction */
+
+ /* TODO: use defines for that stuff */
+
+ switch (cause & 0x0000003c) {
+ case 0x00000008:
+ /* TLBL: XPC is ok */
+ break;
+
+ case 0x00000010:
+ /* AdEL: XPC is of the following instruction */
+ xpc = xpc - 4;
+ break;
+ }
+#else
+ xpc = (u1 *) (ptrint) _gregs[CTX_EPC];
#endif
- instr = *((u4 *) xpc);
- addr = _gregs[(instr >> 21) & 0x1f];
+ /* get exception-throwing instruction */
+
+ mcode = *((u4 *) xpc);
- if (addr == 0) {
- _gregs[REG_ITMP1_XPTR] =
- (ptrint) stacktrace_hardware_nullpointerexception(pv, sp, ra, xpc);
+ d = M_ITYPE_GET_RT(mcode);
+ s1 = M_ITYPE_GET_RS(mcode);
+ disp = M_ITYPE_GET_IMM(mcode);
- _gregs[REG_ITMP2_XPC] = (ptrint) xpc;
+ /* check for special-load */
+
+ if (s1 == REG_ZERO) {
+ /* we use the exception type as load displacement */
+
+ type = disp;
+ val = _gregs[d];
+ }
+ else {
+ /* This is a normal NPE: addr must be NULL and the NPE-type
+ define is 0. */
+
+ addr = _gregs[s1];
+ type = (s4) addr;
+ 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);
+
+ /* set registers (only if exception object ready) */
+
+ if (p != NULL) {
+ _gregs[REG_ITMP1_XPTR] = (intptr_t) p;
+ _gregs[REG_ITMP2_XPC] = (intptr_t) xpc;
#if defined(__UCLIBC__)
- _gregs[CTX_EPC] = (ptrint) asm_handle_exception;
+ _gregs[CTX_EPC] = (intptr_t) asm_handle_exception;
#else
- _mc->pc = (ptrint) asm_handle_exception;
+ _mc->pc = (intptr_t) asm_handle_exception;
#endif
}
else {
- addr += (long) ((instr << 16) >> 16);
-
- throw_cacao_exception_exit(string_java_lang_InternalError,
- "faulting address: 0x%lx at 0x%lx\n",
- addr, xpc);
+#if defined(__UCLIBC__)
+ _gregs[CTX_EPC] = (intptr_t) xpc;
+#else
+ _mc->pc = (intptr_t) xpc;
+#endif
}
}
+/* md_signal_handler_sigusr2 ***************************************************
+
+ DOCUMENT ME
+
+*******************************************************************************/
+
+void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
+{
+}
+
+
+/* md_critical_section_restart *************************************************
+
+ Search the critical sections tree for a matching section and set
+ the PC to the restart point, if necessary.
+
+*******************************************************************************/
+
#if defined(ENABLE_THREADS)
-void thread_restartcriticalsection(ucontext_t *_uc)
+void md_critical_section_restart(ucontext_t *_uc)
{
mcontext_t *_mc;
u1 *pc;
* c-basic-offset: 4
* tab-width: 4
* End:
+ * vim:noexpandtab:sw=4:ts=4:
*/
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