src/kernel/syscall/syscall.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

#include <stdint.h>
#include <kernel/syscall/syscall.h>
#include <kernel/interrupts/interrupts.h>
#include <kernel/io/io.h>

typedef uint32_t (*syscall_func)(unsigned int, ...);

uint32_t (*syscalls[])() = {
        [1] = sys_write
};

void syscall_handler(struct regs *r)
{
    if (r->eax >= sizeof(syscalls) / sizeof(*syscalls))
        return;

    syscall_func location = (syscall_func) syscalls[r->eax];
    if (!location)
        return;

    serial_write("Received syscall!\n");
    location(r->ebx, r->ecx, r->edx, r->esi, r->edi);
}

void syscalls_install()
{
    isr_install_handler(0x80, syscall_handler);
}