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No more double faults B-)

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This commit is contained in:
Ole Morud
2024-08-07 13:38:21 +02:00
parent cf7a7303e3
commit 1e385af53c
16 changed files with 496 additions and 155 deletions
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137
src/kernel/interrupts.c
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@@ -1,11 +1,10 @@
#include <stdint.h>
#include "libc.h"
#include "tty.h"
#include "interrupts.h"
#include "kernel_state.h"
#ifdef __x86_64__
typedef unsigned long long int uword_t;
#else
typedef unsigned int uword_t;
#endif
#define EXCEPTION_DEPTH_MAX 5
struct __attribute__((packed)) interrupt_frame {
uword_t ip;
@@ -15,7 +14,131 @@ struct __attribute__((packed)) interrupt_frame {
uword_t ss;
};
__attribute__((interrupt)) void interrupt_handler_1(struct interrupt_frame* frame)
static void print_interrupt_frame(struct interrupt_frame* f)
{
(void)frame;
printf(str_attach(
"Interrupt frame:\n"
"================\n"
"ip: {x32}\n"
"cs: {x32}\n"
"flags: {x32}\n"
"sp: {x32}\n"
"ss: {x32}\n"),
f->ip,
f->cs,
f->flags,
f->sp,
f->ss);
}
/**
* Exceptions
* ==========
*/
__attribute__((interrupt, noreturn))
void exception_handler_general_protection_fault(struct interrupt_frame* frame, int err)
{
if (kernel.nested_exception_counter++ > EXCEPTION_DEPTH_MAX) {
panic(str_attach("fatal: too many nested exceptions\n"));
}
//terminal_clear();
terminal_set_color(VGA_COLOR_WHITE, VGA_COLOR_RED);
printf(str_attach(
"general protection fault by segment selector {str} :(\n"),
gdt_segment_index_str[err/8]);
if (frame != NULL) {
print_interrupt_frame(frame);
}
__asm__ volatile("cli; hlt");
__builtin_unreachable();
}
__attribute__((interrupt, noreturn))
void exception_handler_double_fault(struct interrupt_frame* frame)
{
(void)frame;
if (kernel.nested_exception_counter++ > EXCEPTION_DEPTH_MAX) {
panic(str_attach("fatal: too many nested exceptions\n"));
}
panic(str_attach("double fault :("));
}
__attribute__((interrupt, noreturn))
void exception_handler_div_by_zero(struct interrupt_frame* frame)
{
(void)frame;
if (kernel.nested_exception_counter++ > EXCEPTION_DEPTH_MAX) {
panic(str_attach("fatal: too many nested exceptions\n"));
}
panic(str_attach("div by zero occured :("));
}
__attribute__((interrupt, noreturn))
void exception_handler_page_fault(struct interrupt_frame* frame, int err)
{
(void)frame;
if (kernel.nested_exception_counter++ > EXCEPTION_DEPTH_MAX) {
panic(str_attach("fatal: too many nested exceptions\n"));
}
terminal_set_color(VGA_COLOR_WHITE, VGA_COLOR_RED);
printf(str_attach(
"page fault :(, err: 0x{x32}\n"),
err,
gdt_segment_index_str[err/8]);
__asm__ volatile("cli; hlt");
__builtin_unreachable();
}
__attribute__((interrupt, noreturn))
void exception_default(struct interrupt_frame* frame)
{
(void)frame;
if (kernel.nested_exception_counter++ > EXCEPTION_DEPTH_MAX) {
panic(str_attach("fatal: too many nested exceptions\n"));
}
panic(str_attach("non-implemented exception occured"));
kernel.nested_exception_counter = 0;
}
/**
* Interrupts
* ==========
*/
__attribute__((interrupt, noreturn))
void interrupt_default(struct interrupt_frame* frame)
{
if (kernel.nested_exception_counter++ > EXCEPTION_DEPTH_MAX) {
panic(str_attach("fatal: too many nested exceptions\n"));
}
(void)frame;
panic(str_attach("non-implemented interrupt invoked"));
kernel.nested_exception_counter = 0;
}
__attribute__((interrupt))
void interrupt_handler_1(struct interrupt_frame* frame)
{
if (kernel.nested_exception_counter++ > EXCEPTION_DEPTH_MAX) {
panic(str_attach("fatal: too many nested exceptions\n"));
}
(void)frame;
printf(str_attach("interrupt_handler_1 called!\n"));
kernel.nested_exception_counter = 0;
}
__attribute__((interrupt))
void interrupt_handler_userspace_exit(struct interrupt_frame* frame)
{
if (kernel.nested_exception_counter++ > EXCEPTION_DEPTH_MAX) {
panic(str_attach("fatal: too many nested exceptions\n"));
}
(void)frame;
printf(str_attach("interrupt_handler_userspace_exit called!\n"));
kernel.nested_exception_counter = 0;
}