diff options
| author | Danny Holman <dholman@gymli.xyz> | 2021-09-28 09:08:38 -0500 |
|---|---|---|
| committer | Danny Holman <dholman@gymli.xyz> | 2021-09-28 09:28:33 -0500 |
| commit | c0019e9d0bd2059351dc7d0274ee0479a71192fc (patch) | |
| tree | 99a9ee22a5e8a102e719d6710226b9c181fae74a /arch/i386/include/kernel | |
| parent | 0ec9e9824e32d3d54d2ad43c3f2743d52127aa92 (diff) | |
arch: i386: fix IDT exception handler
Fix the i386's general exception handler to actually work. Fix provided
by Jon Sanderson (jjs295356@gmail.com).
Signed-off-by: Danny Holman <dholman@gymli.xyz>
Diffstat (limited to 'arch/i386/include/kernel')
| -rw-r--r-- | arch/i386/include/kernel/idt.h | 35 | ||||
| -rw-r--r-- | arch/i386/include/kernel/isr.h | 37 |
2 files changed, 72 insertions, 0 deletions
diff --git a/arch/i386/include/kernel/idt.h b/arch/i386/include/kernel/idt.h new file mode 100644 index 0000000..7ccad30 --- /dev/null +++ b/arch/i386/include/kernel/idt.h @@ -0,0 +1,35 @@ +#ifndef I386_IDT_H +#define I386_IDT_H + +#include <stdint.h> + +// IDT Flags +#define SEGMENT_PRESENT 0x8 +#define SEGMENT_RING0 0x0 +#define SEGMENT_STORAGE 0x0 +#define SEGMENT_GATE 0xE +#define SEGMENT_DPL 0x8 + +#define SEGMENT_FLAG SEGMENT_PRESENT | SEGMENT_RING0 | SEGMENT_STORAGE |\ + SEGMENT_GATE | SEGMENT_DPL; + +struct idt_entry { + uint16_t isr_low; + uint16_t kernel_cs; + uint8_t reserved; + uint8_t flags; + uint16_t isr_high; +} __attribute__((packed)); + +struct idt_ptr { + uint16_t limit; + uint32_t base; +} __attribute__((packed)); + +extern struct idt_entry idt[256]; +extern struct idt_ptr idtr; + +extern void idt_set_gate(uint8_t num, void(*handler)(void), uint16_t cs, uint8_t flags); +extern void exception_handler(int num); + +#endif
\ No newline at end of file diff --git a/arch/i386/include/kernel/isr.h b/arch/i386/include/kernel/isr.h new file mode 100644 index 0000000..a924cd6 --- /dev/null +++ b/arch/i386/include/kernel/isr.h @@ -0,0 +1,37 @@ +#ifndef I386_ISR_H +#define I386_ISR_H + +extern void isr_stub_0(void); +extern void isr_stub_1(void); +extern void isr_stub_2(void); +extern void isr_stub_3(void); +extern void isr_stub_4(void); +extern void isr_stub_5(void); +extern void isr_stub_6(void); +extern void isr_stub_7(void); +extern void isr_stub_8(void); +extern void isr_stub_9(void); +extern void isr_stub_10(void); +extern void isr_stub_11(void); +extern void isr_stub_12(void); +extern void isr_stub_13(void); +extern void isr_stub_14(void); +extern void isr_stub_15(void); +extern void isr_stub_16(void); +extern void isr_stub_17(void); +extern void isr_stub_18(void); +extern void isr_stub_19(void); +extern void isr_stub_20(void); +extern void isr_stub_21(void); +extern void isr_stub_22(void); +extern void isr_stub_23(void); +extern void isr_stub_24(void); +extern void isr_stub_25(void); +extern void isr_stub_26(void); +extern void isr_stub_27(void); +extern void isr_stub_28(void); +extern void isr_stub_29(void); +extern void isr_stub_30(void); +extern void isr_stub_31(void); + +#endif
\ No newline at end of file |