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// MIT License, Copyright (c) 2020 Marvin Borner
#include <cpu.h>
#include <event.h>
#include <fs.h>
#include <interrupts.h>
#include <load.h>
#include <mem.h>
#include <print.h>
#include <proc.h>
#include <str.h>
#include <sys.h>
void syscall_handler(struct regs *r)
{
enum sys num = r->eax;
r->eax = 0;
printf("[SYSCALL] %d\n", num);
switch (num) {
case SYS_LOOP: {
loop();
break;
}
case SYS_MALLOC: {
r->eax = (u32)malloc(r->eax);
break;
}
case SYS_FREE: {
free(r->eax);
break;
}
case SYS_READ: {
r->eax = (u32)read_file((char *)r->ebx);
break;
}
case SYS_WRITE: {
// TODO: Write ext2 support
break;
}
case SYS_EXEC: {
char *path = (char *)r->ebx;
struct proc *proc = proc_make();
((u32 *)proc->regs.esp)[0] = r->ecx;
((u32 *)proc->regs.esp)[1] = r->edx;
((u32 *)proc->regs.esp)[2] = r->esi;
((u32 *)proc->regs.esp)[3] = r->edi;
r->eax = bin_load(path, proc);
break;
}
case SYS_EXIT: {
proc_exit();
break;
}
case SYS_MAP: {
event_map(r->ebx, (u32 *)r->ecx);
break;
}
case SYS_UNMAP: {
event_unmap(r->ebx, (u32 *)r->ecx);
break;
}
default: {
printf("Unknown syscall!\n");
loop();
break;
}
}
}
void syscall_init()
{
idt_set_gate(0x80, (u32)isr128, 0x08, 0x8E);
isr_install_handler(0x80, syscall_handler);
}
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