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/*
**************************************************************************
*
* Component =
*
* Synopsis = rdbgexcep.c
*
* $Id$
*
**************************************************************************
*/
#include <rtems.h>
#include <rtems/error.h>
#include <assert.h>
#include <errno.h>
#include <rdbg/rdbg.h>
#include <rdbg/servrpc.h>
unsigned int NbExceptCtx;
volatile unsigned int NbSerializedCtx;
Exception_context *FirstCtx = NULL;
Exception_context *LastCtx = NULL;
CPU_Exception_frame SavedContext;
/********* Save an exception context at the end of a list *****/
int PushExceptCtx ( Objects_Id Id, Objects_Id semId, CPU_Exception_frame *ctx ) {
Exception_context *SaveCtx;
SaveCtx = (Exception_context *)malloc(sizeof(Exception_context));
if (SaveCtx == NULL)
rtems_panic("Can't allocate memory to save Exception context");
SaveCtx->id = Id;
SaveCtx->ctx = ctx;
SaveCtx->semaphoreId = semId;
SaveCtx->previous = NULL;
SaveCtx->next = NULL;
if (FirstCtx == NULL){ /* initialization */
FirstCtx = SaveCtx;
LastCtx = SaveCtx;
NbExceptCtx = 1;
}
else {
NbExceptCtx ++;
LastCtx->next = SaveCtx;
SaveCtx->previous = LastCtx;
LastCtx = SaveCtx;
}
return 0;
}
/********* Save an temporary exception context in a ******/
/********* global variable ******/
int PushSavedExceptCtx ( Objects_Id Id, CPU_Exception_frame *ctx ) {
memcpy (&(SavedContext), ctx, sizeof(CPU_Exception_frame));
return 0;
}
/****** Remove the context of the specified Id thread *********/
/****** If Id = -1, then return the first context *********/
int PopExceptCtx ( Objects_Id Id ) {
Exception_context *ExtractCtx;
if (FirstCtx == NULL) return -1;
if (Id == -1) {
ExtractCtx = LastCtx;
LastCtx = LastCtx->previous;
free(ExtractCtx);
NbExceptCtx --;
return 0;
}
ExtractCtx = LastCtx;
while (ExtractCtx->id != Id && ExtractCtx != NULL) {
ExtractCtx = ExtractCtx->previous;
}
if (ExtractCtx == NULL)
return -1;
if ( ExtractCtx->previous != NULL)
(ExtractCtx->previous)->next = ExtractCtx->next;
if ( ExtractCtx->next != NULL)
(ExtractCtx->next)->previous = ExtractCtx->previous;
if (ExtractCtx == FirstCtx)
FirstCtx = FirstCtx->next;
else
if (ExtractCtx == LastCtx)
LastCtx = LastCtx->previous;
free(ExtractCtx);
NbExceptCtx --;
return 0;
}
/****** Return the context of the specified Id thread *********/
/****** If Id = -1, then return the first context *********/
Exception_context *GetExceptCtx ( Objects_Id Id ) {
Exception_context *ExtractCtx;
if (FirstCtx == NULL) return NULL;
if (Id == -1) {
return LastCtx;
}
ExtractCtx = LastCtx;
while (ExtractCtx->id != Id && ExtractCtx != NULL) {
ExtractCtx = ExtractCtx->previous;
}
if (ExtractCtx == NULL)
return NULL;
return ExtractCtx;
}
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