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
29
30
31
32
33
34
35
36
37
38
39
|
#include <stdint.h>
#include <kernel/syscall/syscall.h>
#include <kernel/interrupts/interrupts.h>
#include <kernel/system.h>
#include <kernel/lib/stdio.h>
typedef uint32_t (*syscall_func)(unsigned int, ...);
uint32_t (*syscalls[])() = {
[0] = (uint32_t (*)()) halt_loop, // DEBUG!
[1] = sys_write,
[2] = sys_read,
[3] = (uint32_t (*)()) sys_writec,
[4] = sys_readc,
[5] = sys_get_pointers,
[6] = sys_paging_alloc,
[7] = sys_paging_free
};
void syscall_handler(struct regs *r)
{
serial_printf("Received syscall!");
if (r->eax >= sizeof(syscalls) / sizeof(*syscalls))
return;
syscall_func location = (syscall_func) syscalls[r->eax];
if (!location)
return;
//serial_printf("[SYSCALL] %d (0x%x) 0x%x 0x%x 0x%x 0x%x 0x%x", r->eax, location, r->ebx, r->ecx, r->edx, r->esi, r->edi);
r->eax = location(r->ebx, r->ecx, r->edx, r->esi, r->edi);
}
void syscalls_install()
{
isr_install_handler(0x80, syscall_handler);
}
|
