Copyright (C) 1996-2005, 2006, 2007, 2008
CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
+ Copyright (C) 2008 Theobroma Systems Ltd.
This file is part of CACAO.
#include "vm/jit/powerpc64/md.h"
#include "vm/jit/powerpc64/linux/md-abi.h"
-#include "threads/thread.h"
+#include "threads/thread.hpp"
-#include "vm/builtin.h"
-#include "vm/exceptions.h"
-#include "vm/signallocal.h"
+#include "vm/jit/builtin.hpp"
+#include "vm/signallocal.hpp"
+#include "vm/os.hpp"
#include "vm/jit/asmpart.h"
+#include "vm/jit/executionstate.h"
#if defined(ENABLE_PROFILING)
# include "vm/jit/optimizing/profile.h"
#endif
-#include "vm/jit/stacktrace.h"
-#include "vm/jit/trap.h"
+#include "vm/jit/disass.h"
+#include "vm/jit/trap.hpp"
/* md_signal_handler_sigsegv ***************************************************
int type;
intptr_t addr;
intptr_t val;
- void *p;
_uc = (ucontext_t *) _p;
_mc = &(_uc->uc_mcontext);
/* Handle the trap. */
- p = trap_handle(type, val, pv, sp, ra, xpc, _p);
-
- /* Set registers. */
-
- switch (type) {
- case TRAP_COMPILER:
- if (p != NULL) {
- _mc->gp_regs[REG_PV] = (uintptr_t) p;
- _mc->gp_regs[PT_NIP] = (uintptr_t) p;
- break;
- }
-
- /* Get and set the PV from the parent Java method. */
-
- pv = md_codegen_get_pv_from_pc(ra);
-
- _mc->gp_regs[REG_PV] = (uintptr_t) pv;
+ trap_handle(type, val, pv, sp, ra, xpc, _p);
+}
- /* Get the exception object. */
- p = builtin_retrieve_exception();
+/**
+ * Signal handler for patcher calls.
+ */
+void md_signal_handler_sigill(int sig, siginfo_t* siginfo, void* _p)
+{
+ ucontext_t* _uc = (ucontext_t*) _p;
+ mcontext_t* _mc = &(_uc->uc_mcontext);
- assert(p != NULL);
+ /* get register values */
- /* fall-through */
+ void* pv = (void*) _mc->gp_regs[REG_PV];
+ void* sp = (void*) _mc->gp_regs[REG_SP];
+ void* ra = (void*) _mc->gp_regs[PT_LNK]; // The RA is correct for leag methods.
+ void* xpc =(void*) _mc->gp_regs[PT_NIP];
+
+ // Get the illegal-instruction.
+ uint32_t mcode = *((uint32_t*) xpc);
+
+ // Check if the trap instruction is valid.
+ // TODO Move this into patcher_handler.
+ if (patcher_is_valid_trap_instruction_at(xpc) == false) {
+ // Check if the PC has been patched during our way to this
+ // signal handler (see PR85).
+ if (patcher_is_patched_at(xpc) == true)
+ return;
+
+ // We have a problem...
+ log_println("md_signal_handler_sigill: Unknown illegal instruction 0x%x at 0x%lx", mcode, xpc);
+#if defined(ENABLE_DISASSEMBLER)
+ (void) disassinstr(xpc);
+#endif
+ vm_abort("Aborting...");
+ }
- case TRAP_PATCHER:
- if (p == NULL)
- break;
+ // This signal is always a patcher.
+ int type = TRAP_PATCHER;
+ intptr_t val = 0;
- /* fall-through */
-
- default:
- _mc->gp_regs[REG_ITMP1_XPTR] = (uintptr_t) p;
- _mc->gp_regs[REG_ITMP2_XPC] = (uintptr_t) xpc;
- _mc->gp_regs[PT_NIP] = (uintptr_t) asm_handle_exception;
- }
+ // Handle the trap.
+ trap_handle(type, val, pv, sp, ra, xpc, _p);
}
#endif
+/* md_executionstate_read ******************************************************
+
+ Read the given context into an executionstate.
+
+*******************************************************************************/
+
+void md_executionstate_read(executionstate_t *es, void *context)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ s4 i;
+
+ _uc = (ucontext_t *) context;
+ _mc = &(_uc->uc_mcontext);
+
+ /* read special registers */
+ es->pc = (u1 *) _mc->gp_regs[PT_NIP];
+ es->sp = (u1 *) _mc->gp_regs[REG_SP];
+ es->pv = (u1 *) _mc->gp_regs[REG_PV];
+ es->ra = (u1 *) _mc->gp_regs[PT_LNK];
+
+ /* read integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ es->intregs[i] = _mc->gp_regs[i];
+
+ /* read float registers */
+ /* Do not use the assignment operator '=', as the type of
+ * the _mc->fpregs[i] can cause invalid conversions. */
+
+ // The assertion below will fail because _mc->fp_regs[] also
+ // contains the "fpscr" register.
+ //assert(sizeof(_mc->fp_regs) == sizeof(es->fltregs));
+ os_memcpy(&es->fltregs, &_mc->fp_regs, sizeof(es->fltregs));
+}
+
+
+/* md_executionstate_write *****************************************************
+
+ Write the given executionstate back to the context.
+
+*******************************************************************************/
+
+void md_executionstate_write(executionstate_t *es, void *context)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ s4 i;
+
+ _uc = (ucontext_t *) context;
+ _mc = &(_uc->uc_mcontext);
+
+ /* write integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ _mc->gp_regs[i] = es->intregs[i];
+
+ /* write float registers */
+ /* Do not use the assignment operator '=', as the type of
+ * the _mc->fpregs[i] can cause invalid conversions. */
+
+ // The assertion below will fail because _mc->fp_regs[] also
+ // contains the "fpscr" register.
+ //assert(sizeof(_mc->fp_regs) == sizeof(es->fltregs));
+ os_memcpy(&_mc->fp_regs, &es->fltregs, sizeof(es->fltregs));
+
+ /* write special registers */
+ _mc->gp_regs[PT_NIP] = (ptrint) es->pc;
+ _mc->gp_regs[REG_SP] = (ptrint) es->sp;
+ _mc->gp_regs[REG_PV] = (ptrint) es->pv;
+ _mc->gp_regs[PT_LNK] = (ptrint) es->ra;
+}
+
+
/*
* 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
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