38 lines
690 B
C
38 lines
690 B
C
#include "../drivers/vga.h"
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#include "../drivers/isr.h"
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#include "../drivers/idt.h"
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/*
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pop %eax; \
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or $0x200,%eax; \
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push %eax; \
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*/
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void switch_to_user_mode() {
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// Set up a stack structure for switching to user mode.
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asm volatile(" \
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cli; \
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mov $0x23, %ax; \
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mov %ax, %ds; \
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mov %ax, %es; \
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mov %ax, %fs; \
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mov %ax, %gs; \
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mov %esp, %eax; \
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pushl $0x23; \
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pushl %eax; \
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pushf; \
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pushl $0x1B; \
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push $1f; \
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iret; \
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1: \
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");
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}
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void main() {
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init_vga(GRAY,BLACK);
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write_string("Initialized VGA\n");
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isr_install();
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asm volatile("sti");
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write_string("Setup interrupts\n");
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switch_to_user_mode();
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}
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