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Don't regress PC for external interrupts.

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This commit is contained in:
Thomas Harte 2025-04-05 21:39:37 -04:00
parent d5997a30b2
commit ad6ad144a5
1 changed files with 5 additions and 3 deletions
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8
Machines/PCCompatible/PCCompatible.cpp
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@ -743,7 +743,7 @@ public:
// Signal interrupt.
context_.flow_controller.unhalt();
perform_fault({pics_.pic[0].acknowledge()});
perform_fault(pics_.pic[0].acknowledge());
}
// Do nothing if currently halted.
@ -770,6 +770,7 @@ public:
}
}
bool should_log = false;
void perform_instruction() {
// Get the next thing to execute.
if(!context_.flow_controller.should_repeat()) {
@ -790,7 +791,6 @@ public:
context_.flow_controller.begin_instruction();
}
static bool should_log = false;
// if(decoded_ip_ >= 0x7c00 && decoded_ip_ < 0x7c00 + 1024) {
if(should_log) {
const auto next = to_string(decoded_, InstructionSet::x86::Model::i8086);
@ -843,7 +843,7 @@ public:
using Interrupt = InstructionSet::x86::Interrupt;
// Regress the IP if this is an exception that posts the instruction's IP.
if(!posts_next_ip(Interrupt(exception.cause))) {
if(exception.internal && !posts_next_ip(Interrupt(exception.cause))) {
context_.registers.ip() = decoded_ip_;
}
@ -869,6 +869,8 @@ public:
}
void perform_real_interrupt(const uint8_t code) {
printf("From %04x\n", decoded_ip_);
// should_log = true;
try {
InstructionSet::x86::interrupt(
code,