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Better interrupt context checking code

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This commit is contained in:
gbeauche 2004-05-20 11:05:30 +00:00
parent c3f2342f47
commit ec6c98035b
1 changed files with 58 additions and 8 deletions
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66
SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp
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@ -147,6 +147,21 @@ class sheepshaver_cpu
void execute_emul_op_idle_time_1();
void execute_emul_op_idle_time_2();
// CPU context to preserve on interrupt
class interrupt_context {
uint32 gpr[32];
uint32 pc;
uint32 lr;
uint32 ctr;
uint32 cr;
uint32 xer;
sheepshaver_cpu *cpu;
const char *where;
public:
interrupt_context(sheepshaver_cpu *_cpu, const char *_where);
~interrupt_context();
};
public:
// Constructor
@ -533,6 +548,46 @@ int sheepshaver_cpu::compile1(codegen_context_t & cg_context)
return COMPILE_FAILURE;
}
// CPU context to preserve on interrupt
sheepshaver_cpu::interrupt_context::interrupt_context(sheepshaver_cpu *_cpu, const char *_where)
{
#if SAFE_INTERRUPT_PPC >= 2
cpu = _cpu;
where = _where;
// Save interrupt context
memcpy(&gpr[0], &cpu->gpr(0), sizeof(gpr));
pc = cpu->pc();
lr = cpu->lr();
ctr = cpu->ctr();
cr = cpu->get_cr();
xer = cpu->get_xer();
#endif
}
sheepshaver_cpu::interrupt_context::~interrupt_context()
{
#if SAFE_INTERRUPT_PPC >= 2
// Check whether CPU context was preserved by interrupt
if (memcmp(&gpr[0], &cpu->gpr(0), sizeof(gpr)) != 0) {
printf("FATAL: %s: interrupt clobbers registers\n", where);
for (int i = 0; i < 32; i++)
if (gpr[i] != cpu->gpr(i))
printf(" r%d: %08x -> %08x\n", i, gpr[i], cpu->gpr(i));
}
if (pc != cpu->pc())
printf("FATAL: %s: interrupt clobbers PC\n", where);
if (lr != cpu->lr())
printf("FATAL: %s: interrupt clobbers LR\n", where);
if (ctr != cpu->ctr())
printf("FATAL: %s: interrupt clobbers CTR\n", where);
if (cr != cpu->get_cr())
printf("FATAL: %s: interrupt clobbers CR\n", where);
if (xer != cpu->get_xer())
printf("FATAL: %s: interrupt clobbers XER\n", where);
#endif
}
// Handle MacOS interrupt
void sheepshaver_cpu::interrupt(uint32 entry)
{
@ -547,10 +602,6 @@ void sheepshaver_cpu::interrupt(uint32 entry)
printf("FATAL: sheepshaver_cpu::interrupt() called more than once: %d\n", depth);
depth++;
#endif
#if SAFE_INTERRUPT_PPC >= 2
uint32 saved_regs[32];
memcpy(&saved_regs[0], &gpr(0), sizeof(saved_regs));
#endif
#if !MULTICORE_CPU
// Save program counters and branch registers
@ -610,10 +661,6 @@ void sheepshaver_cpu::interrupt(uint32 entry)
interrupt_time += (clock() - interrupt_start);
#endif
#if SAFE_INTERRUPT_PPC >= 2
if (memcmp(&saved_regs[0], &gpr(0), sizeof(saved_regs)) != 0)
printf("FATAL: dirty PowerPC registers\n");
#endif
#if SAFE_INTERRUPT_PPC
depth--;
#endif
@ -1070,6 +1117,8 @@ void sheepshaver_cpu::handle_interrupt(void)
// 68k emulator inactive, in nanokernel?
assert(current_cpu == main_cpu);
if (gpr(1) != KernelDataAddr) {
interrupt_context ctx(this, "PowerPC mode");
// Prepare for 68k interrupt level 1
WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
WriteMacInt32(tswap32(kernel_data->v[0x658 >> 2]) + 0xdc,
@ -1092,6 +1141,7 @@ void sheepshaver_cpu::handle_interrupt(void)
case MODE_EMUL_OP:
// 68k emulator active, within EMUL_OP routine, execute 68k interrupt routine directly when interrupt level is 0
if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
interrupt_context ctx(this, "68k mode");
#if 1
// Execute full 68k interrupt routine
M68kRegisters r;