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#include <kernel/types.h>
#include <kernel/console.H>
#include <kernel/task.H>
#include <kernel/taskmgr.H>
#include <kernel/ppcarch.H>
namespace Systemcalls { void TaskEnd(task_t*); }
namespace ExceptionHandles
{
bool HvEmulation(task_t*);
}
const uint64_t EXCEPTION_SRR1_MASK = 0x00000000783F0000;
const uint64_t EXCEPTION_SRR1_HVEMUL = 0x0000000000080000;
extern "C"
void kernel_execute_prog_ex()
{
task_t* t = TaskManager::getCurrentTask();
uint64_t exception = ppc_getSRR1() & EXCEPTION_SRR1_MASK;
bool handled = false;
switch(exception)
{
case EXCEPTION_SRR1_HVEMUL:
handled = ExceptionHandles::HvEmulation(t);
break;
}
if (!handled)
{
printk("Program exception, killing task %d\n", t->tid);
Systemcalls::TaskEnd(t);
}
}
namespace ExceptionHandles
{
bool HvEmulation(task_t* t)
{
/*printk("NIP = %llx : Inst = %lx\n",
t->context.nip,
(*(uint32_t*)t->context.nip));*/
uint32_t instruction = *(uint32_t*)t->context.nip;
// check for mfsprg3
if ((instruction & 0xfc1fffff) == 0x7c1342a6)
{
t->context.gprs[(instruction & 0x03E00000) >> 21] =
(uint64_t) t;
t->context.nip = (void*) (((uint64_t)t->context.nip)+4);
return true;
}
return false;
}
}
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