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aline / fline exception handler (for toolbox)

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This commit is contained in:
Kelvin Sherlock 2013-02-07 00:01:22 -05:00
parent ba14f15566
commit aee146c708
2 changed files with 43 additions and 3 deletions
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4
cpu/CpuModule.h
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@ -6,6 +6,10 @@ extern "C" {
#endif
typedef void (*cpuLineExceptionFunc)(uint16_t);
extern void cpuSetALineExceptionFunc(cpuLineExceptionFunc func);
extern void cpuSetFLineExceptionFunc(cpuLineExceptionFunc func);
// This header file defines the internal interfaces of the CPU module.
#define CPU_INSTRUCTION_LOGGING

42
cpu/CpuModule_Instructions.c
View File

@ -34,6 +34,20 @@
#include "autoconf.h"
#endif
static cpuLineExceptionFunc cpu_a_line_exception_func = NULL;
static cpuLineExceptionFunc cpu_f_line_exception_func = NULL;
void cpuSetALineExceptionFunc(cpuLineExceptionFunc func)
{
cpu_a_line_exception_func = func;
}
void cpuSetFLineExceptionFunc(cpuLineExceptionFunc func)
{
cpu_f_line_exception_func = func;
}
/*============================================================================*/
/* profiling help functions */
/*============================================================================*/
@ -124,9 +138,23 @@ void cpuUpdateSr(ULO new_sr) {
static void cpuIllegal(void) {
UWO opcode = memoryReadWord(cpuGetPC() - 2);
if ((opcode & 0xf000) == 0xf000) {
cpuThrowFLineException();
} else if ((opcode & 0xa000) == 0xa000) {
if ((opcode & 0xf000) == 0xf000)
{
if (cpu_f_line_exception_func)
{
cpu_f_line_exception_func(opcode);
cpuInitializeFromNewPC(cpuGetPC());
cpuSetInstructionTime(512);
}
else
{
cpuThrowFLineException();
}
}
else if ((opcode & 0xa000) == 0xa000)
{
/*
#ifdef UAE_FILESYS
if ((cpuGetPC() & 0xff0000) == 0xf00000)
{
@ -136,6 +164,14 @@ static void cpuIllegal(void) {
}
else
#endif
*/
if (cpu_a_line_exception_func)
{
cpu_a_line_exception_func(opcode);
cpuInitializeFromNewPC(cpuGetPC());
cpuSetInstructionTime(512);
}
else
{
cpuThrowALineException();
}