-/* src/vm/jit/x86_64/md.c - machine dependent x86_64 Linux functions
+/* src/vm/jit/x86_64/md.c - machine dependent x86_64 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: Christian Thalinger
-
- Changes: Edwin Steiner
-
- $Id: md.c 6265 2007-01-02 20:40:57Z edwin $
-
*/
-#define _GNU_SOURCE
-
#include "config.h"
#include <assert.h>
#include <stdlib.h>
-#include <ucontext.h>
#include "vm/jit/x86_64/md-abi.h"
# include "threads/native/threads.h"
#endif
-#include "vm/exceptions.h"
-#include "vm/signallocal.h"
#include "vm/jit/asmpart.h"
+#include "vm/jit/codegen-common.h"
#include "vm/jit/stacktrace.h"
+#if defined(ENABLE_REPLACEMENT)
+# include "vm/exceptions.h"
+#endif
+
#if !defined(NDEBUG) && defined(ENABLE_DISASSEMBLER)
-#include "vm/options.h" /* XXX debug */
+#include "vmcore/options.h" /* XXX debug */
#include "vm/jit/disass.h" /* XXX debug */
#endif
}
-/* md_signal_handler_sigsegv ***************************************************
-
- NullPointerException signal handler for hardware null pointer
- check.
-
-*******************************************************************************/
-
-void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
-{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
-
- _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>. */
-
- sp = (u1 *) _mc->gregs[REG_RSP];
- xpc = (u1 *) _mc->gregs[REG_RIP];
- ra = xpc; /* return address is equal to xpc */
-
-#if 0
- /* check for StackOverflowException */
-
- threads_check_stackoverflow(sp);
-#endif
-
- _mc->gregs[REG_RAX] =
- (ptrint) stacktrace_hardware_nullpointerexception(NULL, sp, ra, xpc);
-
- _mc->gregs[REG_R10] = (ptrint) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_RIP] = (ptrint) asm_handle_exception;
-}
-
-
-/* md_signal_handler_sigfpe ****************************************************
-
- ArithmeticException signal handler for hardware divide by zero
- check.
-
-*******************************************************************************/
-
-void md_signal_handler_sigfpe(int sig, siginfo_t *siginfo, void *_p)
-{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
-
- _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>. */
-
- sp = (u1 *) _mc->gregs[REG_RSP];
- xpc = (u1 *) _mc->gregs[REG_RIP];
- ra = xpc; /* return address is equal to xpc */
-
- _mc->gregs[REG_RAX] =
- (ptrint) stacktrace_hardware_arithmeticexception(NULL, sp, ra, xpc);
-
- _mc->gregs[REG_R10] = (ptrint) xpc; /* REG_ITMP2_XPC */
- _mc->gregs[REG_RIP] = (ptrint) asm_handle_exception;
-}
-
-
-/* md_signal_handler_sigusr2 ***************************************************
-
- Signal handler for profiling sampling.
-
-*******************************************************************************/
-
-#if defined(ENABLE_THREADS)
-void md_signal_handler_sigusr2(int sig, siginfo_t *siginfo, void *_p)
-{
- 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;
-}
-#endif
-
-
-#if defined(ENABLE_THREADS)
-void thread_restartcriticalsection(ucontext_t *_uc)
-{
- mcontext_t *_mc;
- void *pc;
-
- _mc = &_uc->uc_mcontext;
-
- pc = critical_find_restart_point((void *) _mc->gregs[REG_RIP]);
-
- if (pc != NULL)
- _mc->gregs[REG_RIP] = (ptrint) pc;
-}
-#endif
-
-
-/* md_codegen_patch_branch *****************************************************
-
- Back-patches a branch instruction.
-
-*******************************************************************************/
-
-void md_codegen_patch_branch(codegendata *cd, s4 branchmpc, s4 targetmpc)
-{
- s4 *mcodeptr;
- s4 disp; /* branch displacement */
-
- /* calculate the patch position */
-
- mcodeptr = (s4 *) (cd->mcodebase + branchmpc);
-
- /* Calculate the branch displacement. */
-
- disp = targetmpc - branchmpc;
-
- /* I don't think we have to check for branch-displacement
- overflow. +/-2GB should be enough. */
-
- /* patch the branch instruction before the mcodeptr */
-
- mcodeptr[-1] = disp;
-}
-
-
/* md_stacktrace_get_returnaddress *********************************************
Returns the return address of the current stackframe, specified by
else {
/* catch any problems */
- assert(0);
+ vm_abort("md_get_method_patch_address: unknown instruction %x", mcode);
+
+ /* keep compiler happy */
+
+ pa = NULL;
}
return pa;
#if defined(ENABLE_REPLACEMENT)
void md_patch_replacement_point(codeinfo *code, s4 index, rplpoint *rp, u1 *savedmcode)
{
- s4 disp;
u8 mcode;
/* XXX this is probably unsafe! */
savedmcode[4] = rp->pc[4];
/* build the machine code for the patch */
- disp = (code->replacementstubs - rp->pc)
- + index * REPLACEMENT_STUB_SIZE
- - 5;
-
- mcode = 0xe9 | ((u8) disp << 8);
+ assert(0); /* XXX build trap instruction below */
+ mcode = 0;
/* write spinning instruction */
*(u2*)(rp->pc) = 0xebfe;
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