path: root/c/src/librdbg/src/powerpc/excep_f.c

/*
 **************************************************************************
 *
 * Component =   
 * 
 * Synopsis  =   rdbg/powerpc/excep_f.c
 *
 * $Id$
 *
 **************************************************************************
 */

#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 ASM_FLOAT_VECTOR	: return SIGFPE;
	
        case ASM_TRACE_VECTOR	:
        case ASM_SYS_VECTOR     : return SIGTRAP;
	
	case ASM_ISI_VECTOR	: return SIGSEGV;
	
	case ASM_PROG_VECTOR	:
	case ASM_RESET_VECTOR	:
	case ASM_MACH_VECTOR	:
	case ASM_EXT_VECTOR	:
	case ASM_ALIGN_VECTOR	: return SIGILL;
	
    default:
	break;
    }
    return SIGKILL;
}

  
/*----- Breakpoint Exception management -----*/

    /*
     *  Handler for Breakpoint Exceptions :
     *  software breakpoints.
     */

void
BreakPointExcHdl(CPU_Exception_frame *ctx) 
{
  rtems_status_code status;
  rtems_id continueSemId;

  if ( (justSaveContext) && (ctx->_EXC_number == ASM_SYS_VECTOR) ) {
    PushSavedExceptCtx (_Thread_Executing->Object.id, ctx);
    justSaveContext = 0;
  }
  else {
    if (ctx->_EXC_number != ASM_TRACE_VECTOR){
      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->_EXC_number,
	   ctx->EXC_SRR0,
	   _Thread_Executing->Object.id);
    printk("----------------------------------------------------------\n");
    printk("Processor execution context at time of the fault was  :\n");
    printk("----------------------------------------------------------\n");
    printk("\t R0 = %x\n", ctx->GPR0);
    printk("\t R1 = %x\n", ctx->GPR1);
    printk("\t R2 = %x\n", ctx->GPR2);
    printk("\t R3 = %x\n", ctx->GPR3);
    printk("\t R4 = %x\n", ctx->GPR4);
    printk("\t R5 = %x\n", ctx->GPR5);
    printk("\t R6 = %x\n", ctx->GPR6);
    printk("\t R7 = %x\n", ctx->GPR7);
    printk("\t R8 = %x\n", ctx->GPR8);
    printk("\t R9 = %x\n", ctx->GPR9);
    printk("\t R10 = %x\n", ctx->GPR10);
    printk("\t R11 = %x\n", ctx->GPR11);
    printk("\t R12 = %x\n", ctx->GPR12);
    printk("\t R13 = %x\n", ctx->GPR13);
    printk("\t R14 = %x\n", ctx->GPR14);
    printk("\t R15 = %x\n", ctx->GPR15);
    printk("\t R16 = %x\n", ctx->GPR16);
    printk("\t R17 = %x\n", ctx->GPR17);
    printk("\t R18 = %x\n", ctx->GPR18);
    printk("\t R19 = %x\n", ctx->GPR19);
    printk("\t R20 = %x\n", ctx->GPR20);
    printk("\t R21 = %x\n", ctx->GPR21);
    printk("\t R22 = %x\n", ctx->GPR22);
    printk("\t R23 = %x\n", ctx->GPR23);
    printk("\t R24 = %x\n", ctx->GPR24);
    printk("\t R25 = %x\n", ctx->GPR25);
    printk("\t R26 = %x\n", ctx->GPR26);
    printk("\t R27 = %x\n", ctx->GPR27);
    printk("\t R28 = %x\n", ctx->GPR28);
    printk("\t R29 = %x\n", ctx->GPR29);
    printk("\t R30 = %x\n", ctx->GPR30);
    printk("\t R31 = %x\n", ctx->GPR31);
    printk("\t CR = %x\n", ctx->EXC_CR);
    printk("\t CTR = %x\n", ctx->EXC_CTR);
    printk("\t XER = %x\n", ctx->EXC_XER);
    printk("\t LR = %x\n", ctx->EXC_LR);
    printk("\t MSR = %x\n", ctx->EXC_MSR);
#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->_EXC_number){
    case ASM_TRACE_VECTOR :
      DPRINTF((" TRACE EXCEPTION !!!\n"));
      ctx->EXC_SRR1 &= ~MSR_SE;
      ExitForSingleStep-- ;
      rtems_semaphore_release( wakeupEventSemId );
    break;

    case ASM_PROG_VECTOR :
      DPRINTF((" BREAKPOINT EXCEPTION !!!\n"));
      rtems_semaphore_release( wakeupEventSemId );
    break;

    case ASM_SYS_VECTOR :
      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);
  }

}