/* src/vm/jit/powerpc64/linux/md-os.c - machine dependent PowerPC64 Linux functions
- Copyright (C) 1996-2005, 2006, 2007, 2008
+ Copyright (C) 1996-2005, 2006, 2007, 2008, 2009
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/signallocal.hpp"
#include "vm/jit/asmpart.h"
+#include "vm/jit/executionstate.h"
+#include "vm/jit/trap.hpp"
-#if defined(ENABLE_PROFILING)
-# include "vm/jit/optimizing/profile.h"
-#endif
-
-#include "vm/jit/stacktrace.h"
-#include "vm/jit/trap.h"
-
-
-/* md_signal_handler_sigsegv ***************************************************
-
- Signal handler for hardware-exceptions.
-
-*******************************************************************************/
+/**
+ * Signal handler for hardware-exceptions.
+ */
void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u4 mcode;
- int s1;
- int16_t disp;
- int d;
- int type;
- intptr_t addr;
- intptr_t val;
- void *p;
-
- _uc = (ucontext_t *) _p;
- _mc = &(_uc->uc_mcontext);
-
- /* get register values */
-
- pv = (u1*) _mc->gp_regs[REG_PV];
- sp = (u1*) _mc->gp_regs[REG_SP];
- ra = (u1*) _mc->gp_regs[PT_LNK]; /* correct for leafs */
- xpc =(u1*) _mc->gp_regs[PT_NIP];
-
- /* get the throwing instruction */
-
- mcode = *((u4*)xpc);
-
- s1 = M_INSTR_OP2_IMM_A(mcode);
- disp = M_INSTR_OP2_IMM_I(mcode);
- d = M_INSTR_OP2_IMM_D(mcode);
-
- val = _mc->gp_regs[d];
-
- if (s1 == REG_ZERO) {
- /* We use the exception type as load displacement. */
- type = disp;
-
- if (type == TRAP_COMPILER) {
- /* The XPC is the RA minus 1, because the RA points to the
- instruction after the call. */
-
- xpc = ra - 4;
- }
- }
- else {
- /* Normal NPE. */
- addr = _mc->gp_regs[s1];
- type = (int) addr;
- }
-
- /* 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. */
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t* _mc = &(_uc->uc_mcontext);
- pv = md_codegen_get_pv_from_pc(ra);
+ void* xpc = (void*) _mc->gp_regs[PT_NIP];
- _mc->gp_regs[REG_PV] = (uintptr_t) pv;
-
- /* Get the exception object. */
-
- p = builtin_retrieve_exception();
+ // Handle the trap.
+ trap_handle(TRAP_SIGSEGV, xpc, _p);
+}
- assert(p != NULL);
- /* fall-through */
+/**
+ * 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);
- case TRAP_PATCHER:
- if (p == NULL)
- break;
+ void* xpc =(void*) _mc->gp_regs[PT_NIP];
- /* 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(TRAP_SIGILL, xpc, _p);
}
#endif
-/* md_critical_section_restart *************************************************
+/* md_executionstate_read ******************************************************
- Search the critical sections tree for a matching section and set
- the PC to the restart point, if necessary.
+ Read the given context into an executionstate.
*******************************************************************************/
-#if defined(ENABLE_THREADS)
-void md_critical_section_restart(ucontext_t *_uc)
+void md_executionstate_read(executionstate_t *es, void *context)
{
- mcontext_t *_mc;
- u1 *pc;
- u1 *npc;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ s4 i;
+ _uc = (ucontext_t *) context;
_mc = &(_uc->uc_mcontext);
- pc = (u1 *) _mc->gp_regs[PT_NIP];
+ /* 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];
- npc = critical_find_restart_point(pc);
+ /* read float registers */
+ /* Do not use the assignment operator '=', as the type of
+ * the _mc->fpregs[i] can cause invalid conversions. */
- if (npc != NULL)
- _mc->gp_regs[PT_NIP] = (ptrint) npc;
+ // 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;
}
-#endif
/*
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