43 lines
989 B
C
43 lines
989 B
C
#include <stdint.h>
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#include <stddef.h>
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#include <debugging.h>
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#include <kernel/tty.h>
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#include <kernel/gdt.h>
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#include <kernel/task.h>
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#include <debugging.h>
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static void* memcpy(void* restrict dstptr, const void* restrict srcptr, size_t size) {
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unsigned char* dst = (unsigned char*) dstptr;
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const unsigned char* src = (const unsigned char*) srcptr;
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for (size_t i = 0; i < size; i++)
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dst[i] = src[i];
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return dstptr;
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}
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extern void jump_to_userspace();
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void run_program(uint8_t* program, size_t length)
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{
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uint8_t* userland_code = (uint8_t*) 0x00800000;
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memcpy(userland_code, program, length);
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struct CPUState target = {
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.eip = (size_t) userland_code,
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.esp = 0x00c00100,
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.eax = 0,
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.ebx = 0,
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.ecx = 0,
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.edx = 0,
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.cs = 0x18 | 0x3,
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.ds = 0x20 | 0x3,
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.eflags = 0x0200,
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.ebp = 0x00c00100,
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};
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struct Task task = {
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.state = target,
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};
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add_task(task);
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}
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