59 lines
1.0 KiB
C++
59 lines
1.0 KiB
C++
#include "interrupts/Interrupts.h"
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#include "trace/StackTracer.h"
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#include "utils/Registers.h"
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void Interrupts::disable()
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{
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asm volatile("cli");
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}
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void Interrupts::enable()
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{
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asm volatile("sti");
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}
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extern int _asm_interrupt_exit;
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bool Interrupts::is_in_handler()
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{
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return stack_trace_contains((uintptr_t)&_asm_interrupt_exit);
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}
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void Interrupts::return_from_handler(Context* context)
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{
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asm volatile("mov %0, %%rsp\n"
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"jmp _asm_interrupt_exit"
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:
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: "r"(context));
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}
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bool Interrupts::are_enabled()
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{
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return (read_rflags() & 0x200) > 0;
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}
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static bool saved_interrupt_state;
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void Interrupts::push_and_disable()
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{
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saved_interrupt_state = are_enabled();
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disable();
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}
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void Interrupts::push_and_enable()
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{
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saved_interrupt_state = are_enabled();
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enable();
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}
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void Interrupts::pop()
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{
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if (saved_interrupt_state && !are_enabled()) enable();
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else if (!saved_interrupt_state && are_enabled())
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disable();
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}
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bool Interrupts::were_enabled()
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{
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return saved_interrupt_state;
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} |