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// MIT License, Copyright (c) 2020 Marvin Borner
#include <cpu.h>
#include <fs.h>
#include <interrupts.h>
#include <load.h>
#include <mem.h>
#include <mm.h>
#include <net.h>
#include <print.h>
#include <proc.h>
#include <str.h>
#include <sys.h>
#include <syscall.h>
#include <timer.h>
static void syscall_handler(struct regs *r)
{
enum sys num = r->eax;
r->eax = 0;
/* printf("[SYSCALL] %d from %s\n", num, proc_current()->name); */
switch (num) {
case SYS_LOOP: {
loop();
break;
}
case SYS_ALLOC: {
r->eax = (u32)memory_alloc(proc_current()->page_dir, r->ebx,
MEMORY_CLEAR | MEMORY_USER);
break;
}
case SYS_FREE: {
memory_free(proc_current()->page_dir, memory_range(r->ebx, r->ecx));
break;
}
case SYS_STAT: {
r->eax = (u32)vfs_stat((char *)r->ebx, (struct stat *)r->ecx);
break;
}
case SYS_READ: {
if (vfs_ready((char *)r->ebx)) {
r->eax = (u32)vfs_read((char *)r->ebx, (void *)r->ecx, r->edx, r->esi);
} else {
if (vfs_wait((char *)r->ebx, (u32)vfs_read) < 0)
r->eax = -1;
else
proc_yield(r);
}
break;
}
case SYS_WRITE: {
r->eax = (u32)vfs_write((char *)r->ebx, (void *)r->ecx, r->edx, r->esi);
break;
}
case SYS_IOCTL: {
r->eax = (u32)vfs_ioctl((char *)r->ebx, r->ecx, (void *)r->edx, (void *)r->esi,
(void *)r->edi);
break;
}
case SYS_POLL: {
s32 ret = vfs_poll((const char **)r->ebx);
if (ret == PROC_MAX_WAIT_IDS + 1)
proc_yield(r);
else
r->eax = ret;
break;
}
case SYS_EXEC: {
char *path = (char *)r->ebx;
struct proc *proc = proc_make(PROC_PRIV_NONE);
r->eax = (u32)bin_load(path, proc);
u32 argc = 3; // TODO: Add argc evaluator
char **argv = malloc(sizeof(*argv) * (argc + 1));
argv[0] = (char *)r->ecx;
argv[1] = (char *)r->edx;
argv[2] = (char *)r->esi;
argv[3] = (char *)r->edi;
argv[4] = NULL;
((u32 *)proc->regs.useresp)[0] = argc;
((u32 *)proc->regs.useresp)[1] = (u32)argv;
if (r->eax)
proc_exit(proc, (int)r->eax);
proc_yield(r);
break;
}
case SYS_EXIT: {
print("EXIT!\n");
proc_exit(proc_current(), (int)r->ebx);
break;
}
case SYS_BOOT: { // TODO: Move
if (r->ebx != SYS_BOOT_MAGIC || !proc_super()) {
r->eax = -1;
break;
}
switch (r->ecx) {
case SYS_BOOT_REBOOT:
print("Rebooting...\n");
__asm__ volatile("ud2");
break;
case SYS_BOOT_SHUTDOWN:
print("Shutting down...\n");
outw(0xB004, 0x2000);
outw(0x604, 0x2000);
outw(0x4004, 0x3400);
__asm__ volatile("ud2");
break;
default:
r->eax = -1;
}
break;
}
case SYS_YIELD: {
proc_yield(r);
break;
}
case SYS_TIME: {
r->eax = timer_get();
break;
}
case SYS_NET_OPEN: {
r->eax = (int)net_open(r->ebx);
break;
}
case SYS_NET_CLOSE: {
struct socket *s = (void *)r->ebx;
int status = net_close(s);
if (!status) {
proc_yield(r);
return;
}
r->eax = net_close(s);
break;
}
case SYS_NET_CONNECT: {
struct socket *s = (void *)r->ebx;
if (s->state == S_CONNECTED)
r->eax = 1;
else if (s->state == S_FAILED || s->state == S_CLOSED)
r->eax = 0;
else if (s->state == S_OPEN)
r->eax = net_connect(s, r->ecx, r->edx);
break;
}
case SYS_NET_SEND: {
net_send((void *)r->ebx, (void *)r->ecx, r->edx);
break;
}
case SYS_NET_RECEIVE: {
r->eax = net_receive((void *)r->ebx, (void *)r->ecx, r->edx);
break;
}
default: {
printf("Unknown syscall %d!\n", num);
break;
}
}
}
void syscall_init(void)
{
idt_set_gate(0x80, (u32)isr128, 0x08, 0x8E);
isr_install_handler(0x80, syscall_handler);
}
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