Authors: Christian Thalinger
- Changes:
+ Changes: Edwin Steiner
- $Id: md.c 4357 2006-01-22 23:33:38Z twisti $
+ $Id: md.c 5051 2006-06-28 15:39:22Z twisti $
*/
#include "config.h"
+#include <assert.h>
#include <stdlib.h>
#include <ucontext.h>
#include "vm/jit/x86_64/md-abi.h"
+#if defined(ENABLE_THREADS)
+# include "threads/native/threads.h"
+#endif
+
#include "vm/exceptions.h"
#include "vm/signallocal.h"
#include "vm/jit/asmpart.h"
#include "vm/jit/stacktrace.h"
+#if !defined(NDEBUG) && defined(ENABLE_DISASSEMBLER)
+#include "vm/options.h" /* XXX debug */
+#include "vm/jit/disass.h" /* XXX debug */
+#endif
+
/* md_init *********************************************************************
_uc = (ucontext_t *) _p;
_mc = &_uc->uc_mcontext;
- /* ATTENTION: don't use CACAO internal REG_* defines as they are */
- /* different to the ones in <ucontext.h> */
+ /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
+ different to the ones in <ucontext.h>. */
sp = (u1 *) _mc->gregs[REG_RSP];
xpc = (u1 *) _mc->gregs[REG_RIP];
_uc = (ucontext_t *) _p;
_mc = &_uc->uc_mcontext;
- /* ATTENTION: don't use CACAO internal REG_* defines as they are */
- /* different to the ones in <ucontext.h> */
+ /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
+ different to the ones in <ucontext.h>. */
sp = (u1 *) _mc->gregs[REG_RSP];
xpc = (u1 *) _mc->gregs[REG_RIP];
}
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
-void thread_restartcriticalsection(ucontext_t *uc)
+/* md_signal_handler_sigusr2 ***************************************************
+
+ NullPointerException signal handler for hardware null pointer
+ check.
+
+*******************************************************************************/
+
+void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
{
- void *critical;
+ threadobject *t;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ u1 *pc;
+
+ t = THREADOBJECT;
+
+ _uc = (ucontext_t *) _p;
+ _mc = &_uc->uc_mcontext;
+
+ /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
+ different to the ones in <ucontext.h>. */
+
+ pc = (u1 *) _mc->gregs[REG_RIP];
+
+ t->pc = pc;
+}
+
+
+#if defined(ENABLE_THREADS)
+void thread_restartcriticalsection(ucontext_t *_uc)
+{
+ mcontext_t *_mc;
+ void *pc;
+
+ _mc = &_uc->uc_mcontext;
- critical = thread_checkcritical((void *) uc->uc_mcontext.gregs[REG_RIP]);
+ pc = critical_find_restart_point((void *) _mc->gregs[REG_RIP]);
- if (critical)
- uc->uc_mcontext.gregs[REG_RIP] = (ptrint) critical;
+ if (pc != NULL)
+ _mc->gregs[REG_RIP] = (ptrint) pc;
}
#endif
}
+/* md_get_method_patch_address *************************************************
+
+ Gets the patch address of the currently compiled method. The offset
+ is extracted from the load instruction(s) before the jump and added
+ to the right base address (PV or REG_METHODPTR).
+
+ INVOKESTATIC/SPECIAL:
+
+ 49 ba 98 3a ed ab aa 2a 00 00 mov $0x2aaaabed3a98,%r10
+ 49 ff d2 rex64Z callq *%r10
+
+ INVOKEVIRTUAL:
+
+ 4c 8b 17 mov (%rdi),%r10
+ 49 8b 82 00 00 00 00 mov 0x0(%r10),%rax
+ 48 ff d3 rex64 callq *%rax
+
+ INVOKEINTERFACE:
+
+ 4c 8b 17 mov (%rdi),%r10
+ 4d 8b 92 00 00 00 00 mov 0x0(%r10),%r10
+ 49 8b 82 00 00 00 00 mov 0x0(%r10),%rax
+ 48 ff d3 rex64 callq *%r11
+
+*******************************************************************************/
+
+u1 *md_get_method_patch_address(u1 *ra, stackframeinfo *sfi, u1 *mptr)
+{
+ u1 mcode;
+ s4 offset;
+ u1 *pa; /* patch address */
+
+ /* go back to the actual call instruction (3-bytes) */
+
+ ra = ra - 3;
+
+ /* get the last byte of the call */
+
+ mcode = ra[2];
+
+ /* check for the different calls */
+
+ /* INVOKESTATIC/SPECIAL */
+
+ if (mcode == 0xd2) {
+ /* patch address is 8-bytes before the call instruction */
+
+ pa = ra - 8;
+
+ } else if (mcode == 0xd3) {
+ /* INVOKEVIRTUAL/INTERFACE */
+
+ /* Get the offset from the instruction (the offset address is
+ 4-bytes before the call instruction). */
+
+ offset = *((s4 *) (ra - 4));
+
+ /* add the offset to the method pointer */
+
+ pa = mptr + offset;
+
+ } else {
+ /* catch any problems */
+
+ assert(0);
+ }
+
+ return pa;
+}
+
+
/* md_codegen_findmethod *******************************************************
On this architecture just a wrapper function to codegen_findmethod.
}
+/* md_cacheflush ***************************************************************
+
+ Calls the system's function to flush the instruction and data
+ cache.
+
+*******************************************************************************/
+
+void md_cacheflush(u1 *addr, s4 nbytes)
+{
+ /* do nothing */
+}
+
+
+/* md_icacheflush **************************************************************
+
+ Calls the system's function to flush the instruction cache.
+
+*******************************************************************************/
+
+void md_icacheflush(u1 *addr, s4 nbytes)
+{
+ /* do nothing */
+}
+
+
+/* md_dcacheflush **************************************************************
+
+ Calls the system's function to flush the data cache.
+
+*******************************************************************************/
+
+void md_dcacheflush(u1 *addr, s4 nbytes)
+{
+ /* do nothing */
+}
+
+
+/* md_patch_replacement_point **************************************************
+
+ Patch the given replacement point.
+
+*******************************************************************************/
+
+void md_patch_replacement_point(rplpoint *rp)
+{
+ u8 mcode;
+
+ /* XXX this is probably unsafe! */
+
+ /* save the current machine code */
+ mcode = *(u8*)rp->pc;
+
+ /* write spinning instruction */
+ *(u2*)(rp->pc) = 0xebfe;
+
+ /* write 5th byte */
+ rp->pc[4] = (rp->mcode >> 32);
+
+ /* write first word */
+ *(u4*)(rp->pc) = (u4) rp->mcode;
+
+ /* store saved mcode */
+ rp->mcode = mcode;
+
+#if !defined(NDEBUG) && defined(ENABLE_DISASSEMBLER)
+ {
+ u1* u1ptr = rp->pc;
+ DISASSINSTR(u1ptr);
+ fflush(stdout);
+ }
+#endif
+
+ /* XXX if required asm_cacheflush(rp->pc,8); */
+}
+
/*
* These are local overrides for various environment variables in Emacs.
* Please do not remove this and leave it at the end of the file, where
* c-basic-offset: 4
* tab-width: 4
* End:
+ * vim:noexpandtab:sw=4:ts=4:
*/
projects / cacao.git / blobdiff