-/* src/vm/jit/alpha/linux/md.c - machine dependent Alpha Linux functions
+/* src/vm/jit/sparc64/linux/md-os.c - machine dependent SPARC Linux functions
- Copyright (C) 1996-2005, 2006 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, 2008
+ CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
- Contact: cacao@cacaojvm.org
-
- Authors: Christian Thalinger
-
- Changes:
-
- $Id: md-os.c 4357 2006-01-22 23:33:38Z twisti $
-
*/
+
#include "config.h"
#include <assert.h>
-#include <ucontext.h>
+#include <stdint.h>
+#include <signal.h>
#include "vm/types.h"
+#include "vm/jit/sparc64/codegen.h"
#include "vm/jit/sparc64/md-abi.h"
-#include "vm/exceptions.h"
-#include "vm/signallocal.h"
-#include "vm/stringlocal.h"
+#include "vm/signallocal.hpp"
+
#include "vm/jit/asmpart.h"
-#include "vm/jit/stacktrace.h"
+#include "vm/jit/stacktrace.hpp"
+#include "vm/jit/trap.hpp"
+
+typedef struct sigcontext sigcontext;
+
+ptrint md_get_reg_from_context(sigcontext *ctx, u4 rindex)
+{
+ ptrint val;
+ s8 *window;
+
+
+ /* return 0 for REG_ZERO */
+
+ if (rindex == 0)
+ return 0;
+
+
+ if (rindex <= 15) {
+
+ /* register is in global or out range, available in context */
+
+ val = ctx->sigc_regs.u_regs[rindex];
+ }
+ else {
+ assert(rindex <= 31);
+
+ /* register is local or in, need to fetch from regsave area on stack */
+
+ window = ctx->sigc_regs.u_regs[REG_SP] + BIAS;
+ val = window[rindex - 16];
+ }
+
+ return val;
+}
+
+
/* md_signal_handler_sigsegv ***************************************************
*******************************************************************************/
-void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
+void md_signal_handler_sigsegv(int sig, siginfo_t *info , void *_p)
{
+ /*
ucontext_t *_uc;
mcontext_t *_mc;
- u4 instr;
- ptrint addr;
+ */
+ sigcontext *ctx;
u1 *pv;
u1 *sp;
u1 *ra;
u1 *xpc;
+ u4 mcode;
+ int d;
+ int s1;
+ int16_t disp;
+ intptr_t val;
+ intptr_t addr;
+ int type;
+ void *p;
+
+ ctx = (sigcontext *) info;
- _uc = (ucontext_t *) _p;
- _mc = &_uc->uc_mcontext;
- instr = *((s4 *) (_mc->mc_gregs[MC_PC]));
- /*addr = _mc->sc_regs[(instr >> 16) & 0x1f];*/
- addr = 0;
+ pv = (u1 *) md_get_reg_from_context(ctx, REG_PV_CALLEE);
+ sp = (u1 *) md_get_reg_from_context(ctx, REG_SP);
+ ra = (u1 *) md_get_reg_from_context(ctx, REG_RA_CALLEE); /* this is correct for leafs */
+ xpc = (u1 *) ctx->sigc_regs.tpc;
- if (addr == 0) {
- pv = (u1 *) _mc->mc_gregs[MC_G2];
- sp = (u1 *) _mc->mc_fp;
- ra = (u1 *) _mc->mc_i7; /* this is correct for leafs */
- xpc = (u1 *) _mc->mc_gregs[MC_PC];
+ /* get exception-throwing instruction */
- _mc->mc_gregs[MC_G4] =
- (ptrint) stacktrace_hardware_nullpointerexception(pv, sp, ra, xpc);
+ mcode = *((u4 *) xpc);
- _mc->mc_gregs[MC_G5] = (ptrint) xpc;
- _mc->mc_gregs[MC_PC] = (ptrint) asm_handle_exception;
+ d = M_OP3_GET_RD(mcode);
+ s1 = M_OP3_GET_RS(mcode);
+ disp = M_OP3_GET_IMM(mcode);
- } else {
- addr += (long) ((instr << 16) >> 16);
+ /* flush register windows? */
+
+ val = md_get_reg_from_context(ctx, d);
- throw_cacao_exception_exit(string_java_lang_InternalError,
- "Segmentation fault: 0x%016lx at 0x%016lx\n",
- addr, _mc->mc_gregs[MC_PC]);
+ /* check for special-load */
+
+ if (s1 == REG_ZERO) {
+ /* we use the exception type as load displacement */
+
+ type = disp;
}
-}
+ else {
+ /* This is a normal NPE: addr must be NULL and the NPE-type
+ define is 0. */
+ addr = md_get_reg_from_context(ctx, s1);
+ type = (int) addr;
+ }
-#if defined(USE_THREADS) && defined(NATIVE_THREADS)
-void thread_restartcriticalsection(ucontext_t *_uc)
-{
- mcontext_t *_mc;
- void *critical;
+ /* Handle the trap. */
- _mc = &_uc->uc_mcontext;
+ p = trap_handle(type, val, pv, sp, ra, xpc, _p);
- critical = thread_checkcritical((void *) _mc->sc_pc);
+ /* set registers */
- if (critical)
- _mc->sc_pc = (ptrint) critical;
+ ctx->sigc_regs.u_regs[REG_ITMP2_XPTR] = (uintptr_t) p;
+ ctx->sigc_regs.u_regs[REG_ITMP3_XPC] = (uintptr_t) xpc;
+ ctx->sigc_regs.tpc = (uintptr_t) asm_handle_exception;
+ ctx->sigc_regs.tnpc = (uintptr_t) asm_handle_exception + 4;
}
-#endif
+/* md_icacheflush **************************************************************
+
+ Calls the system's function to flush the instruction cache.
+
+*******************************************************************************/
+
+void md_icacheflush(u1 *addr, s4 nbytes)
+{
+ u1* end;
+
+ end = addr + nbytes;
+
+ /* zero the least significant 3 bits to align on a 64-bit boundary */
+ addr = (u1 *) (((ptrint) addr) & -8l);
+
+ while (addr < end) {
+ __asm__ (
+ "flush %0"
+ :
+ : "r"(addr)
+ );
+ addr += 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