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-rw-r--r--arch/i386/boot/gdt.c58
-rw-r--r--arch/i386/boot/idt.c162
-rw-r--r--arch/i386/boot/isr.s129
3 files changed, 0 insertions, 349 deletions
diff --git a/arch/i386/boot/gdt.c b/arch/i386/boot/gdt.c
deleted file mode 100644
index c0cf127..0000000
--- a/arch/i386/boot/gdt.c
+++ /dev/null
@@ -1,58 +0,0 @@
-#include <kernel/gdt.h>
-#include <kernel/asm.h>
-#include <kernel/string.h>
-
-struct gdt_entry desc[6];
-struct gdt_ptr gp;
-struct tss_entry tss_entry;
-
-void gdt_set_gate(int num, uint32_t base, uint32_t limit, uint8_t access, uint8_t gran) {
- desc[num].base_low = (base & 0xFFFF);
- desc[num].base_middle = (base >> 16) & 0xFF;
- desc[num].base_high = (base >> 24) & 0xFF;
-
- desc[num].limit_low = (limit & 0xFFFF);
- desc[num].gran = (limit >> 16) & 0x0F;
- desc[num].gran |= (gran & 0xF0);
- desc[num].access = access;
-}
-
-void write_tss(int num, uint32_t ss0, uint32_t esp0) {
- uint32_t base = (uint32_t)&tss_entry;
- uint32_t limit = base + sizeof(struct tss_entry);
-
- gdt_set_gate(num, base, limit, 0x89, 0x00);
- memset(&tss_entry, 0x0, sizeof(tss_entry));
-
- tss_entry.ss0 = ss0;
- tss_entry.esp0 = esp0;
- tss_entry.cs = 0x0B;
- tss_entry.ss = 0x13;
- tss_entry.ds = 0x13;
- tss_entry.es = 0x13;
- tss_entry.fs = 0x13;
- tss_entry.gs = 0x13;
- tss_entry.iomap_base = sizeof(tss_entry);
-}
-
-void set_kernel_esp(uint32_t esp) {
- tss_entry.esp0 = esp;
-}
-
-void gdt_install(void) {
- gp.limit = (sizeof(struct gdt_entry) * 6) - 1;
- gp.base = (uint32_t)&desc;
-
- gdt_set_gate(0, 0, 0, 0, 0);
- gdt_set_gate(1, 0, 0xFFFFF, 0x9A, 0xCF);
- gdt_set_gate(2, 0, 0xFFFFF, 0x92, 0xCF);
- gdt_set_gate(3, 0, 0xFFFFF, 0xFA, 0xCF);
- gdt_set_gate(4, 0, 0xFFFFF, 0xF2, 0xCF);
-
- uint32_t esp;
- __asm__ volatile("movl %%esp, %0" : "=r"(esp));
- write_tss(5, 0x10, esp);
-
- flush_gdt();
- flush_tss();
-}
diff --git a/arch/i386/boot/idt.c b/arch/i386/boot/idt.c
deleted file mode 100644
index 7b9401d..0000000
--- a/arch/i386/boot/idt.c
+++ /dev/null
@@ -1,162 +0,0 @@
-#include <kernel/syscall.h>
-#include <kernel/panic.h>
-#include <kernel/gdt.h>
-#include <kernel/isr.h>
-#include <kernel/io.h>
-#include <kernel/pic.h>
-#include <kernel/string.h>
-#include <kernel/paging.h>
-#include <stdint.h>
-
-__attribute__((aligned(0x10)))
-struct idt_entry idt[256];
-struct idt_ptr idtr;
-
-const char* exceptions[] = {
- "Division by zero",
- "Debug",
- "Non-maskable interrupt",
- "Breakpoint",
- "Overflow",
- "Out-of-bounds",
- "Invalid opcode",
- "FPU not available",
- "Double fault",
- "RESERVED",
- "Invalid TSS",
- "Segment not present",
- "Stack fault",
- "General protection fault",
- "Page fault",
- "RESERVED",
- "FPU exception",
- "Alignment check",
- "Machine check",
- "FPU-SIMD exception",
- "Virtualization exception",
- "Control protection"
- "RESERVED",
- "Hypervisor injection",
- "VMM exception",
- "Security exception",
- "RESERVED",
- "Triple fault",
- "RESERVED"
-};
-
-__attribute__((noreturn))
-void halt_catch_fire(struct isr_frame *frame) {
- dump_reg(frame);
- kprintf("ERRNO=%x\n", frame->errno);
- __asm__ volatile("cli;hlt");
- while (1);
-}
-
-void exception_handler(struct isr_frame *frame) {
- switch (frame->vector) {
- case 0x00:
- panic("Division by zero in kernel address space");
- halt_catch_fire(frame);
- case 0x06:
- panic("Invalid opcode in kernel address space");
- halt_catch_fire(frame);
- case 0x08:
- panic("Double fault in interrupt handler");
- halt_catch_fire(frame);
- case 0x0D:
- panic("Protection fault in kernel address space");
- halt_catch_fire(frame);
- case 0x0E:
- page_fault_handler(frame);
- break;
- default:
- panic("Unhandled exception");
- halt_catch_fire(frame);
- }
-}
-
-void interrupt_handler(struct isr_frame frame) {
- if (frame.vector < 32) {
- exception_handler(&frame);
- } else if (frame.vector < 48) {
- irq_dispatch(&frame);
- } else {
- switch (frame.vector) {
- case 0x80:
- handle_syscall(&frame);
- break;
- default:
- panic("Unmapped interrupt");
- halt_catch_fire(&frame);
- __asm__ volatile("cli;hlt");
- }
- }
-}
-
-void idt_set_gate(uint8_t num, void (*handler)(void), uint16_t cs, uint8_t flags) {
- struct idt_entry *desc = &idt[num];
- desc->isr_low = (uint16_t)(((uint32_t)handler >> 0) & 0xFFFF);
- desc->isr_high = (uint16_t)(((uint32_t)handler >> 16) & 0xFFFF);
- desc->reserved = 0;
- desc->kernel_cs = cs;
- desc->flags = flags;
-}
-
-void idt_install(void) {
- idtr.limit = (uint16_t)sizeof(struct idt_entry) * 256 - 1;
- idtr.base = (uint32_t)idt;
-
- idt_set_gate(0x0, isr_stub_0, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x1, isr_stub_1, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x2, isr_stub_2, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x3, isr_stub_3, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x4, isr_stub_4, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x5, isr_stub_5, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x6, isr_stub_6, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x7, isr_stub_7, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x8, isr_stub_8, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x9, isr_stub_9, 0x08, IDT_EXCEPTION);
- idt_set_gate(0xA, isr_stub_10, 0x08, IDT_EXCEPTION);
- idt_set_gate(0xB, isr_stub_11, 0x08, IDT_EXCEPTION);
- idt_set_gate(0xC, isr_stub_12, 0x08, IDT_EXCEPTION);
- idt_set_gate(0xD, isr_stub_13, 0x08, IDT_EXCEPTION);
- idt_set_gate(0xE, isr_stub_14, 0x08, IDT_EXCEPTION);
- idt_set_gate(0xF, isr_stub_15, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x10, isr_stub_16, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x11, isr_stub_17, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x12, isr_stub_18, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x13, isr_stub_19, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x14, isr_stub_20, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x15, isr_stub_21, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x16, isr_stub_22, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x17, isr_stub_23, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x18, isr_stub_24, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x19, isr_stub_25, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x1A, isr_stub_26, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x1B, isr_stub_27, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x1C, isr_stub_28, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x1D, isr_stub_29, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x1E, isr_stub_30, 0x08, IDT_EXCEPTION);
- idt_set_gate(0x1F, isr_stub_31, 0x08, IDT_EXCEPTION);
-
- idt_set_gate(0x20, irq_stub_0, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x21, irq_stub_1, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x22, irq_stub_2, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x23, irq_stub_3, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x24, irq_stub_4, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x25, irq_stub_5, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x26, irq_stub_6, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x27, irq_stub_7, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x28, irq_stub_8, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x29, irq_stub_9, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x2A, irq_stub_10, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x2B, irq_stub_11, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x2C, irq_stub_12, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x2D, irq_stub_13, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x2E, irq_stub_14, 0x08, IDT_INTERRUPT);
- idt_set_gate(0x2F, irq_stub_15, 0x08, IDT_INTERRUPT);
-
- idt_set_gate(0x80, syscall_stub, 0x08, IDT_INTERRUPT);
-
- __asm__ volatile("lidt %0" : : "memory"(idtr));
-}
diff --git a/arch/i386/boot/isr.s b/arch/i386/boot/isr.s
deleted file mode 100644
index 55db35e..0000000
--- a/arch/i386/boot/isr.s
+++ /dev/null
@@ -1,129 +0,0 @@
-.section .text
-
-.macro isr_err_stub num
-.global isr_stub_\num
-.type isr_stub_\num, @function
-isr_stub_\num:
- cli
- pushl $\num
- jmp isr_frame_asm
-.endm
-.macro isr_no_err_stub num
-.global isr_stub_\num
-.type isr_stub_\num, @function
-isr_stub_\num:
- cli
- pushl $0
- pushl $\num
- jmp isr_frame_asm
-.endm
-
-.macro irq_stub num
-.global irq_stub_\num
-.type irq_stub_\num, @function
-irq_stub_\num:
- cli
- pushl $0
- pushl $\num+32
- jmp isr_frame_asm
-.endm
-
-.global syscall_stub
-syscall_stub:
- cli
- pushl $0
- pushl $0x80
- jmp isr_frame_asm
-
-isr_frame_asm:
- pushl %eax
- pushl %ebx
- pushl %ecx
- pushl %edx
- pushl %esi
- pushl %edi
-
- movl %cr0, %eax
- pushl %eax
- movl %cr2, %eax
- pushl %eax
- movl %cr3, %eax
- pushl %eax
- movl %cr4, %eax
- pushl %eax
-
- pushl %esp
- call set_kernel_esp
- addl $4, %esp
-
- cld
- call interrupt_handler
-
- popl %eax
- movl %eax, %cr4
- popl %eax
- movl %eax, %cr3
- popl %eax
- movl %eax, %cr2
- popl %eax
- movl %eax, %cr0
-
- popl %edi
- popl %esi
- popl %edx
- popl %ecx
- popl %ebx
- popl %eax
- addl $8, %esp
-
- iret
-
-isr_no_err_stub 0
-isr_no_err_stub 1
-isr_no_err_stub 2
-isr_no_err_stub 3
-isr_no_err_stub 4
-isr_no_err_stub 5
-isr_no_err_stub 6
-isr_no_err_stub 7
-isr_err_stub 8
-isr_no_err_stub 9
-isr_err_stub 10
-isr_err_stub 11
-isr_err_stub 12
-isr_err_stub 13
-isr_err_stub 14
-isr_no_err_stub 15
-isr_no_err_stub 16
-isr_err_stub 17
-isr_no_err_stub 18
-isr_no_err_stub 19
-isr_no_err_stub 20
-isr_err_stub 21
-isr_no_err_stub 22
-isr_no_err_stub 23
-isr_no_err_stub 24
-isr_no_err_stub 25
-isr_no_err_stub 26
-isr_no_err_stub 27
-isr_no_err_stub 28
-isr_err_stub 29
-isr_err_stub 30
-isr_no_err_stub 31
-
-irq_stub 0
-irq_stub 1
-irq_stub 2
-irq_stub 3
-irq_stub 4
-irq_stub 5
-irq_stub 6
-irq_stub 7
-irq_stub 8
-irq_stub 9
-irq_stub 10
-irq_stub 11
-irq_stub 12
-irq_stub 13
-irq_stub 14
-irq_stub 15
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 18:24:22 +0000