/* src/vm/jit/powerpc/linux/md-os.c - machine dependent PowerPC Linux functions
- 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
+ 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.
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- $Id: md-os.c 7864 2007-05-03 21:17:26Z twisti $
-
*/
#include "config.h"
#include <assert.h>
+#include <stdint.h>
#include <ucontext.h>
#include "vm/types.h"
#include "vm/jit/powerpc/codegen.h"
+#include "vm/jit/powerpc/md.h"
#include "vm/jit/powerpc/linux/md-abi.h"
-#if defined(ENABLE_THREADS)
-# include "threads/native/threads.h"
-#endif
+#include "threads/thread.hpp"
-#include "vm/exceptions.h"
+#include "vm/jit/builtin.hpp"
#include "vm/signallocal.h"
-#include "vm/stringlocal.h"
+#include "vm/os.hpp"
+
#include "vm/jit/asmpart.h"
+#include "vm/jit/disass.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/patcher-common.hpp"
+#include "vm/jit/trap.h"
/* md_signal_handler_sigsegv ***************************************************
void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- unsigned long *_gregs;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u4 mcode;
- s4 s1;
- s4 disp;
- s4 d;
- ptrint addr;
- ptrint val;
- s4 type;
- java_objectheader *o;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pv;
+ u1 *sp;
+ u1 *ra;
+ u1 *xpc;
+ u4 mcode;
+ int s1;
+ int16_t disp;
+ int d;
+ intptr_t addr;
+ intptr_t val;
+ int type;
+ void *p;
_uc = (ucontext_t *) _p;
/* we use the exception type as load displacement */
type = disp;
+
+ if (type == TRAP_COMPILER) {
+ /* The XPC is the RA minus 4, because the RA points to the
+ instruction after the call. */
+
+ xpc = ra - 4;
+ }
}
else {
/* This is a normal NPE: addr must be NULL and the NPE-type
define is 0. */
addr = _gregs[s1];
- type = EXCEPTION_HARDWARE_NULLPOINTER;
+ type = addr;
+ }
+
+ /* Handle the trap. */
+
+ p = trap_handle(type, val, pv, sp, ra, xpc, _p);
+
+ /* Set registers. */
+
+ switch (type) {
+ case TRAP_COMPILER:
+ if (p != NULL) {
+ _gregs[REG_PV] = (uintptr_t) p;
+ _gregs[PT_NIP] = (uintptr_t) p;
+ break;
+ }
+
+ /* Get and set the PV from the parent Java method. */
- if (addr != 0)
- vm_abort("md_signal_handler_sigsegv: faulting address is not NULL: addr=%p", addr);
+ pv = md_codegen_get_pv_from_pc(ra);
+
+ _gregs[REG_PV] = (uintptr_t) pv;
+
+ /* Get the exception object. */
+
+ p = builtin_retrieve_exception();
+
+ assert(p != NULL);
+
+ /* fall-through */
+
+ default:
+ _gregs[REG_ITMP1_XPTR] = (uintptr_t) p;
+ _gregs[REG_ITMP2_XPC] = (uintptr_t) xpc;
+ _gregs[PT_NIP] = (uintptr_t) asm_handle_exception;
}
+}
- /* generate appropriate exception */
- o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
+/**
+ * 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;
+ unsigned long* _gregs;
- /* set registers */
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ /* get register values */
+
+ void* pv = (void*) _gregs[REG_PV];
+ void* sp = (void*) _gregs[REG_SP];
+ void* ra = (void*) _gregs[PT_LNK]; // The RA is correct for leag methods.
+ void* xpc =(void*) _gregs[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...");
+ }
+
+ // This signal is always a patcher.
+ int type = TRAP_PATCHER;
+ intptr_t val = 0;
- _gregs[REG_ITMP1_XPTR] = (ptrint) o;
- _gregs[REG_ITMP2_XPC] = (ptrint) xpc;
- _gregs[PT_NIP] = (ptrint) asm_handle_exception;
+ // Handle the trap.
+ void* p = trap_handle(type, val, pv, sp, ra, xpc, _p);
+
+ // Set registers if we have an exception, continue execution
+ // otherwise.
+ if (p != NULL) {
+ _gregs[REG_ITMP1_XPTR] = (uintptr_t) p;
+ _gregs[REG_ITMP2_XPC] = (uintptr_t) xpc;
+ _gregs[PT_NIP] = (uintptr_t) asm_handle_exception;
+ }
}
void md_signal_handler_sigtrap(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- unsigned long *_gregs;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u4 mcode;
- s4 s1;
- ptrint val;
- s4 type;
- java_objectheader *o;
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pv;
+ u1 *sp;
+ u1 *ra;
+ u1 *xpc;
+ u4 mcode;
+ int s1;
+ intptr_t val;
+ int type;
+ void *p;
_uc = (ucontext_t *) _p;
s1 = M_OP3_GET_A(mcode);
- /* for now we only handle ArrayIndexOutOfBoundsException */
+ /* For now we only handle ArrayIndexOutOfBoundsException. */
- type = EXCEPTION_HARDWARE_ARRAYINDEXOUTOFBOUNDS;
+ type = TRAP_ArrayIndexOutOfBoundsException;
val = _gregs[s1];
- /* generate appropriate exception */
+ /* Handle the trap. */
+
+ p = trap_handle(type, val, pv, sp, ra, xpc, _p);
+
+ /* Set registers. */
+
+ _gregs[REG_ITMP1_XPTR] = (uintptr_t) p;
+ _gregs[REG_ITMP2_XPC] = (uintptr_t) xpc;
+ _gregs[PT_NIP] = (uintptr_t) asm_handle_exception;
+}
+
+
+/* md_signal_handler_sigusr1 ***************************************************
+
+ Signal handler for suspending threads.
+
+*******************************************************************************/
+
+#if defined(ENABLE_THREADS) && defined(ENABLE_GC_CACAO)
+void md_signal_handler_sigusr1(int sig, siginfo_t *siginfo, void *_p)
+{
+ ucontext_t *_uc;
+ mcontext_t *_mc;
+ unsigned long *_gregs;
+ u1 *pc;
+ u1 *sp;
+
+ _uc = (ucontext_t *) _p;
+
+#if defined(__UCLIBC__)
+ _mc = &(_uc->uc_mcontext);
+ _gregs = _mc->regs->gpr;
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
+#endif
+
+ /* get the PC and SP for this thread */
- o = exceptions_new_hardware_exception(pv, sp, ra, xpc, type, val);
+ pc = (u1 *) _gregs[PT_NIP];
+ sp = (u1 *) _gregs[REG_SP];
- /* set registers */
+ /* now suspend the current thread */
- _gregs[REG_ITMP1_XPTR] = (ptrint) o;
- _gregs[REG_ITMP2_XPC] = (ptrint) xpc;
- _gregs[PT_NIP] = (ptrint) asm_handle_exception;
+ threads_suspend_ack(pc, sp);
}
+#endif
/* md_signal_handler_sigusr2 ***************************************************
tobj->pc = pc;
}
+#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.
*******************************************************************************/
-void md_critical_section_restart(ucontext_t *_uc)
+void md_executionstate_read(executionstate_t *es, void *context)
{
+ ucontext_t *_uc;
mcontext_t *_mc;
unsigned long *_gregs;
- u1 *pc;
- u1 *npc;
+ s4 i;
+
+ _uc = (ucontext_t *) context;
#if defined(__UCLIBC__)
- _mc = &(_uc->uc_mcontext);
- _gregs = _mc->regs->gpr;
+#error Please port md_executionstate_read to __UCLIBC__
#else
_mc = _uc->uc_mcontext.uc_regs;
_gregs = _mc->gregs;
#endif
- pc = (u1 *) _gregs[PT_NIP];
+ /* read special registers */
+ es->pc = (u1 *) _gregs[PT_NIP];
+ es->sp = (u1 *) _gregs[REG_SP];
+ es->pv = (u1 *) _gregs[REG_PV];
+ es->ra = (u1 *) _gregs[PT_LNK];
- npc = critical_find_restart_point(pc);
+ /* read integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ es->intregs[i] = _gregs[i];
- if (npc != NULL) {
- log_println("md_critical_section_restart: pc=%p, npc=%p", pc, npc);
+ /* read float registers */
+ /* Do not use the assignment operator '=', as the type of
+ * the _mc->fpregs[i] can cause invalid conversions. */
- _gregs[PT_NIP] = (ptrint) npc;
- }
+ assert(sizeof(_mc->fpregs.fpregs) == sizeof(es->fltregs));
+ os_memcpy(&es->fltregs, &_mc->fpregs.fpregs, sizeof(_mc->fpregs.fpregs));
}
+
+
+/* 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;
+ unsigned long *_gregs;
+ s4 i;
+
+ _uc = (ucontext_t *) context;
+
+#if defined(__UCLIBC__)
+#error Please port md_executionstate_write to __UCLIBC__
+#else
+ _mc = _uc->uc_mcontext.uc_regs;
+ _gregs = _mc->gregs;
#endif
+ /* write integer registers */
+ for (i = 0; i < INT_REG_CNT; i++)
+ _gregs[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. */
+
+ assert(sizeof(_mc->fpregs.fpregs) == sizeof(es->fltregs));
+ os_memcpy(&_mc->fpregs.fpregs, &es->fltregs, sizeof(_mc->fpregs.fpregs));
+
+ /* write special registers */
+ _gregs[PT_NIP] = (ptrint) es->pc;
+ _gregs[REG_SP] = (ptrint) es->sp;
+ _gregs[REG_PV] = (ptrint) es->pv;
+ _gregs[PT_LNK] = (ptrint) es->ra;
+}
+
/*
* These are local overrides for various environment variables in Emacs.
projects / cacao.git / blobdiff