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CPU: Handle breakpoint trap
Also, start working on the debugger app.
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parent
c112f53357
commit
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10 changed files with 184 additions and 23 deletions
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@ -297,6 +297,21 @@ void page_fault_handler(RegisterState regs)
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}
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}
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EH_ENTRY_NO_CODE(3, breakpoint);
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void breakpoint_handler(RegisterState regs)
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{
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clac();
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if (!Process::current || Process::current->is_ring0()) {
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klog() << "Breakpoint Trap in Ring0";
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hang();
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return;
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}
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if (Thread::current->tracer()) {
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Thread::current->tracer()->set_regs(regs);
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}
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Thread::current->send_urgent_signal_to_self(SIGTRAP);
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}
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#define EH(i, msg) \
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static void _exception##i() \
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{ \
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@ -316,7 +331,6 @@ void page_fault_handler(RegisterState regs)
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EH(1, "Debug exception")
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EH(2, "Unknown error")
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EH(3, "Breakpoint")
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EH(4, "Overflow")
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EH(5, "Bounds check")
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EH(8, "Double fault")
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@ -486,7 +500,7 @@ void idt_init()
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register_interrupt_handler(0x00, divide_error_asm_entry);
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register_interrupt_handler(0x01, _exception1);
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register_interrupt_handler(0x02, _exception2);
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register_interrupt_handler(0x03, _exception3);
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register_user_callable_interrupt_handler(0x03, breakpoint_asm_entry);
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register_interrupt_handler(0x04, _exception4);
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register_interrupt_handler(0x05, _exception5);
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register_interrupt_handler(0x06, illegal_instruction_asm_entry);
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