/*
* ======== TaskSupport_start ========
* Create a task's initial stack image
*/
Ptr TaskSupport_start(Ptr currTsk, ITaskSupport_FuncPtr enter,
ITaskSupport_FuncPtr exit, Error_Block *eb)
{
Ptr sp;
UInt size;
Char *sptr;
Task_Object *tsk = (Task_Object *)(currTsk);
/*
* The SP register is only 16 bits on 28x. Ensure that the last address
* in the new stack is less than 0xffff
*/
if (((ULong)tsk->stack) + (tsk->stackSize) >= MAX_SP_ADDR) {
Error_raise(eb, TaskSupport_E_invalidStack, tsk->stack, 0);
return (NULL);
}
/* Initialize every word in the stack to STACK_INIT_VAL */
if (Task_initStackFlag) {
size = tsk->stackSize;
sptr = (Char *)tsk->stack;
while (size--) {
*sptr++ = STACK_INIT_VAL;
}
}
sp = TaskSupport_buildTaskStack((Ptr)tsk->stack,
tsk->fxn,
exit,
enter,
tsk->arg0,
tsk->arg1);
return (sp);
}
/*
* ======== TaskSupport_start ========
* Create a task's initial stack image
*/
Ptr TaskSupport_start(Ptr currTsk, ITaskSupport_FuncPtr enter, ITaskSupport_FuncPtr exit, Error_Block *eb)
{
Ptr sp;
UInt size;
Char *sptr;
Task_Object *tsk = (Task_Object *)(currTsk);
if (Task_initStackFlag) {
size = tsk->stackSize;
sptr = (Char *)tsk->stack;
while (size--) {
*sptr++ = 0xbe; /* fill stack with known cookie */
}
}
sp = TaskSupport_buildTaskStack((Ptr)((SizeT)tsk->stack + tsk->stackSize-8), tsk->fxn, exit, enter, tsk->arg0, tsk->arg1);
return (sp);
}
/*
* ======== TaskSupport_start ========
* Create a task's initial stack image
*/
Ptr TaskSupport_start(Ptr currTsk, ITaskSupport_FuncPtr enter, ITaskSupport_FuncPtr exit, Error_Block *eb)
{
Ptr sp;
UInt size;
Char *sptr;
Task_Object *tsk = (Task_Object *)(currTsk);
if (Task_initStackFlag) {
size = tsk->stackSize;
sptr = (Char *)tsk->stack;
while (size--) {
*sptr++ = 0xbe; /* fill stack with known cookie */
}
}
/*
* The stack buffer is already aligned on 8 bytes.
* buildTaskStack creates a stack image that results in 8 byte alignment
* on Task func entry only if passed a 4 byte aligned stack ptr
*/
sp = TaskSupport_buildTaskStack((Ptr)((SizeT)tsk->stack + tsk->stackSize-4), tsk->fxn, exit, enter, tsk->arg0, tsk->arg1);
return (sp);
}
