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[/] [or1k/] [trunk/] [rtems-20020807/] [c/] [src/] [librdbg/] [src/] [m68k/] [excep_f.c] - Rev 1780
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/* ************************************************************************** * * Component = * * Synopsis = rdbg/m68k/excep_f.c * * excep_f.c,v 1.2 2002/02/01 17:00:01 joel Exp * ************************************************************************** */ #include <rtems.h> #include <rtems/error.h> #include <assert.h> #include <errno.h> #include <rdbg/rdbg.h> #include <rdbg/servrpc.h> int ExcepToSig (Exception_context * ctx) { int excep = getExcNum (ctx); switch (excep) { case 2: return 10; break; /* bus error */ case 3: return 10; break; /* address error */ case 4: return 4; break; /* illegal instruction */ case 5: return 8; break; /* zero divide */ case 6: return 8; break; /* chk instruction */ case 7: return 8; break; /* trapv instruction */ case 8: return 11; break; /* privilege violation */ case 9: return 5; break; /* trace trap */ case 10: return 4; break; /* line 1010 emulator */ case 11: return 4; break; /* line 1111 emulator */ /* * Coprocessor protocol violation. Using a standard MMU or FPU * this cannot be triggered by software. Call it a SIGBUS. */ case 13: return 10; break; case 31: return 2; break; /* interrupt */ case 33: return 5; break; /* monitor breakpoint */ case 34: return 2; break; /* lets use this for SCC1 interrupt */ case 35: return 5; break; /* rdbg breakpoint */ case 36: return 2; break; /* enter RDBG */ /* * This is a trap #8 instruction. Apparently it is someone's software * convention for some sort of SIGFPE condition. Whose? How many * people are being screwed by having this code the way it is? * Is there a clean solution? */ case 40: return 8; break; /* floating point err */ case 47: return 5; break; /* rdbg breakpoint */ case 48: return 8; break; /* floating point err */ case 49: return 8; break; /* floating point err */ case 50: return 8; break; /* zero divide */ case 51: return 8; break; /* underflow */ case 52: return 8; break; /* operand error */ case 53: return 8; break; /* overflow */ case 54: return 8; break; /* NAN */ default: return 7; /* "software generated" */ } return SIGKILL; } /*----- Breakpoint Exception management -----*/ /* * Handler for Breakpoint Exceptions : * software breakpoints. */ void BreakPointExcHdl (CPU_Exception_frame * ctx) { rtems_status_code status; rtems_id continueSemId; connect_rdbg_exception (); /* monitor stub changes trace vector */ if ((justSaveContext) && (ctx->vecnum == 47)) { /* break */ PushSavedExceptCtx (_Thread_Executing->Object.id, ctx); justSaveContext = 0; } else { if (ctx->vecnum != 9) { /* trace */ NbSerializedCtx++; rtems_semaphore_obtain (serializeSemId, RTEMS_WAIT, RTEMS_NO_TIMEOUT); NbSerializedCtx--; } currentTargetThread = _Thread_Executing->Object.id; #ifdef DDEBUG printk ("----------------------------------------------------------\n"); printk ("Exception %d caught at PC %x by thread %d\n", ctx->vecnum, ctx->pc, _Thread_Executing->Object.id); printk ("----------------------------------------------------------\n"); printk ("Processor execution context at time of the fault was :\n"); printk ("----------------------------------------------------------\n"); printk ("\t A0 = %x\n", ctx->a0); printk ("\t A1 = %x\n", ctx->a1); printk ("\t A2 = %x\n", ctx->a2); printk ("\t A3 = %x\n", ctx->a3); printk ("\t A4 = %x\n", ctx->a4); printk ("\t A5 = %x\n", ctx->a5); printk ("\t A6 = %x\n", ctx->a6); printk ("\t A7 = %x\n", ctx->a7); printk ("\t D0 = %x\n", ctx->d0); printk ("\t D1 = %x\n", ctx->d1); printk ("\t D2 = %x\n", ctx->d2); printk ("\t D3 = %x\n", ctx->d3); printk ("\t D4 = %x\n", ctx->d4); printk ("\t D5 = %x\n", ctx->d5); printk ("\t D6 = %x\n", ctx->d6); printk ("\t D7 = %x\n", ctx->d7); printk ("\t SR = %x\n", ctx->sr); #endif status = rtems_semaphore_create (rtems_build_name ('D', 'B', 'G', 'c'), 0, RTEMS_FIFO | RTEMS_COUNTING_SEMAPHORE | RTEMS_NO_INHERIT_PRIORITY | RTEMS_NO_PRIORITY_CEILING | RTEMS_LOCAL, 0, &continueSemId); if (status != RTEMS_SUCCESSFUL) rtems_panic ("Can't create continue semaphore: `%s'\n", rtems_status_text (status)); PushExceptCtx (_Thread_Executing->Object.id, continueSemId, ctx); switch (ctx->vecnum) { case 9: /* trace */ DPRINTF ((" TRACE EXCEPTION !!!\n")); ctx->sr &= ~(1 << 15); ExitForSingleStep--; rtems_semaphore_release (wakeupEventSemId); break; case 47: /* trap #15 */ DPRINTF ((" BREAKPOINT EXCEPTION !!!\n")); rtems_semaphore_release (wakeupEventSemId); break; case 36: /* trap #4 */ DPRINTF ((" ENTER RDBG !!!\n")); rtems_semaphore_release (wakeupEventSemId); break; default: DPRINTF ((" OTHER EXCEPTION !!!\n")); rtems_semaphore_release (wakeupEventSemId); break; } rtems_semaphore_obtain (continueSemId, RTEMS_WAIT, RTEMS_NO_TIMEOUT); PopExceptCtx (_Thread_Executing->Object.id); rtems_semaphore_delete (continueSemId); } connect_rdbg_exception (); /* monitor stub changes trace vector */ }
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