#include "threads/thread.hpp"
-#include "vm/jit/builtin.hpp"
#include "vm/signallocal.hpp"
#include "vm/jit/asmpart.h"
#include "vm/jit/executionstate.h"
#include "vm/jit/trap.hpp"
-#include "vm/jit/stacktrace.hpp"
-/* md_signal_handler_sigsegv ***************************************************
-
- Signal handler for hardware exception.
-
-*******************************************************************************/
-
+/**
+ * Signal handler for hardware exception.
+ */
void md_signal_handler_sigsegv(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- void *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- u1 opc;
- u1 mod;
- u1 rm;
- s4 d;
- s4 disp;
- int type;
- intptr_t val;
- void *p;
-
- _uc = (ucontext_t *) _p;
- _mc = &_uc->uc_mcontext;
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t* _mc = &_uc->uc_mcontext;
/* ATTENTION: Don't use CACAO's internal REG_* defines as they are
different to the ones in <ucontext.h>. */
- pv = NULL; /* is resolved during stackframeinfo creation */
- 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
-
- /* get exception-throwing instruction */
-
- opc = M_ALD_MEM_GET_OPC(xpc);
- mod = M_ALD_MEM_GET_MOD(xpc);
- rm = M_ALD_MEM_GET_RM(xpc);
-
- /* for values see emit_mov_mem_reg and emit_mem */
-
- if ((opc == 0x8b) && (mod == 0) && (rm == 4)) {
- /* this was a hardware-exception */
-
- d = M_ALD_MEM_GET_REG(xpc);
- disp = M_ALD_MEM_GET_DISP(xpc);
-
- /* we use the exception type as load displacement */
-
- type = disp;
-
- /* XXX FIX ME! */
-
- /* ATTENTION: The _mc->gregs layout is even worse than on
- i386! See /usr/include/sys/ucontext.h. We need a
- switch-case here... */
-
- switch (d) {
- case 0: /* REG_RAX == 13 */
- d = REG_RAX;
- break;
- case 1: /* REG_RCX == 14 */
- d = REG_RCX;
- break;
- case 2: /* REG_RDX == 12 */
- d = REG_RDX;
- break;
- case 3: /* REG_RBX == 11 */
- d = REG_RBX;
- break;
- case 4: /* REG_RSP == 15 */
- d = REG_RSP;
- break;
- case 5: /* REG_RBP == 10 */
- d = REG_RBP;
- break;
- case 6: /* REG_RSI == 9 */
- d = REG_RSI;
- break;
- case 7: /* REG_RDI == 8 */
- d = REG_RDI;
- break;
- case 8: /* REG_R8 == 0 */
- case 9: /* REG_R9 == 1 */
- case 10: /* REG_R10 == 2 */
- case 11: /* REG_R11 == 3 */
- case 12: /* REG_R12 == 4 */
- case 13: /* REG_R13 == 5 */
- case 14: /* REG_R14 == 6 */
- case 15: /* REG_R15 == 7 */
- d = d - 8;
- break;
- }
-
- val = _mc->gregs[d];
-
- if (type == TRAP_COMPILER) {
- /* The PV from the compiler stub is equal to the XPC. */
-
- pv = xpc;
-
- /* We use a framesize of zero here because the call pushed
- the return addres onto the stack. */
-
- ra = md_stacktrace_get_returnaddress(sp, 0);
-
- /* Skip the RA on the stack. */
-
- sp = sp + 1 * SIZEOF_VOID_P;
-
- /* The XPC is the RA minus 1, because the RA points to the
- instruction after the call. */
-
- xpc = ra - 3;
- }
- }
- else {
- /* this was a normal NPE */
-
- type = TRAP_NullPointerException;
- val = 0;
- }
-
- /* Handle the trap. */
-
- p = trap_handle(type, val, pv, sp, ra, xpc, _p);
-
- /* Set registers. */
+ void* xpc = (void*) _mc->gregs[REG_RIP];
- if (type == TRAP_COMPILER) {
- if (p == NULL) {
- _mc->gregs[REG_RSP] = (uintptr_t) sp; /* Remove RA from stack. */
- }
- }
+ // Handle the trap.
+ trap_handle(TRAP_SIGSEGV, xpc, _p);
}
-/* md_signal_handler_sigfpe ****************************************************
-
- ArithmeticException signal handler for hardware divide by zero
- check.
-
-*******************************************************************************/
-
+/**
+ * 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 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- int type;
- intptr_t val;
-
- _uc = (ucontext_t *) _p;
- _mc = &_uc->uc_mcontext;
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t* _mc = &_uc->uc_mcontext;
/* ATTENTION: Don't use CACAO's internal REG_* defines as they are
different to the ones in <ucontext.h>. */
- pv = NULL;
- sp = (u1 *) _mc->gregs[REG_RSP];
- xpc = (u1 *) _mc->gregs[REG_RIP];
- ra = xpc; /* return address is equal to xpc */
-
- /* This is an ArithmeticException. */
-
- type = TRAP_ArithmeticException;
- val = 0;
-
- /* Handle the trap. */
+ void* xpc = (void*) _mc->gregs[REG_RIP];
- trap_handle(type, val, pv, sp, ra, xpc, _p);
+ // Handle the trap.
+ trap_handle(TRAP_SIGFPE, xpc, _p);
}
-/* md_signal_handler_sigill ****************************************************
-
- Signal handler for patchers.
-
-*******************************************************************************/
-
+/**
+ * Signal handler for patchers.
+ */
void md_signal_handler_sigill(int sig, siginfo_t *siginfo, void *_p)
{
- ucontext_t *_uc;
- mcontext_t *_mc;
- u1 *pv;
- u1 *sp;
- u1 *ra;
- u1 *xpc;
- int type;
- intptr_t val;
-
- _uc = (ucontext_t *) _p;
- _mc = &_uc->uc_mcontext;
+ ucontext_t* _uc = (ucontext_t *) _p;
+ mcontext_t* _mc = &_uc->uc_mcontext;
/* ATTENTION: Don't use CACAO's internal REG_* defines as they are
different to the ones in <ucontext.h>. */
- pv = NULL;
- sp = (u1 *) _mc->gregs[REG_RSP];
- xpc = (u1 *) _mc->gregs[REG_RIP];
- ra = xpc; /* return address is equal to 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 at 0x%lx", xpc);
-#if defined(ENABLE_DISASSEMBLER)
- (void) disassinstr(xpc);
-#endif
- vm_abort("Aborting...");
- }
-
- /* This is a patcher. */
-
- type = TRAP_PATCHER;
- val = 0;
-
- /* Handle the trap. */
+ void* xpc = (void*) _mc->gregs[REG_RIP];
- trap_handle(type, val, pv, sp, ra, xpc, _p);
+ // Handle the trap.
+ trap_handle(TRAP_SIGILL, xpc, _p);
}
_uc = (ucontext_t *) context;
_mc = &_uc->uc_mcontext;
+ /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
+ different to the ones in <ucontext.h>. */
+
/* read special registers */
es->pc = (u1 *) _mc->gregs[REG_RIP];
es->sp = (u1 *) _mc->gregs[REG_RSP];
_uc = (ucontext_t *) context;
_mc = &_uc->uc_mcontext;
+ /* ATTENTION: Don't use CACAO's internal REG_* defines as they are
+ different to the ones in <ucontext.h>. */
+
/* write integer registers */
for (i = 0; i < INT_REG_CNT; i++) {
/* XXX FIX ME! */
projects / cacao.git / blobdiff