You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
116 lines
2.5 KiB
116 lines
2.5 KiB
#include <unistd.h>
|
|
#include <proc.h>
|
|
#include <syscall.h>
|
|
#include <trap.h>
|
|
#include <stdio.h>
|
|
#include <pmm.h>
|
|
#include <assert.h>
|
|
#include <clock.h>
|
|
|
|
static int
|
|
sys_exit(uint32_t arg[]) {
|
|
int error_code = (int)arg[0];
|
|
return do_exit(error_code);
|
|
}
|
|
|
|
static int
|
|
sys_fork(uint32_t arg[]) {
|
|
struct trapframe *tf = current->tf;
|
|
uintptr_t stack = tf->tf_esp;
|
|
return do_fork(0, stack, tf);
|
|
}
|
|
|
|
static int
|
|
sys_wait(uint32_t arg[]) {
|
|
int pid = (int)arg[0];
|
|
int *store = (int *)arg[1];
|
|
return do_wait(pid, store);
|
|
}
|
|
|
|
static int
|
|
sys_exec(uint32_t arg[]) {
|
|
const char *name = (const char *)arg[0];
|
|
size_t len = (size_t)arg[1];
|
|
unsigned char *binary = (unsigned char *)arg[2];
|
|
size_t size = (size_t)arg[3];
|
|
return do_execve(name, len, binary, size);
|
|
}
|
|
|
|
static int
|
|
sys_yield(uint32_t arg[]) {
|
|
return do_yield();
|
|
}
|
|
|
|
static int
|
|
sys_kill(uint32_t arg[]) {
|
|
int pid = (int)arg[0];
|
|
return do_kill(pid);
|
|
}
|
|
|
|
static int
|
|
sys_getpid(uint32_t arg[]) {
|
|
return current->pid;
|
|
}
|
|
|
|
static int
|
|
sys_putc(uint32_t arg[]) {
|
|
int c = (int)arg[0];
|
|
cputchar(c);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
sys_pgdir(uint32_t arg[]) {
|
|
print_pgdir();
|
|
return 0;
|
|
}
|
|
|
|
static uint32_t
|
|
sys_gettime(uint32_t arg[]) {
|
|
return (int)ticks;
|
|
}
|
|
static uint32_t
|
|
sys_lab6_set_priority(uint32_t arg[])
|
|
{
|
|
uint32_t priority = (uint32_t)arg[0];
|
|
lab6_set_priority(priority);
|
|
return 0;
|
|
}
|
|
|
|
static int (*syscalls[])(uint32_t arg[]) = {
|
|
[SYS_exit] sys_exit,
|
|
[SYS_fork] sys_fork,
|
|
[SYS_wait] sys_wait,
|
|
[SYS_exec] sys_exec,
|
|
[SYS_yield] sys_yield,
|
|
[SYS_kill] sys_kill,
|
|
[SYS_getpid] sys_getpid,
|
|
[SYS_putc] sys_putc,
|
|
[SYS_pgdir] sys_pgdir,
|
|
[SYS_gettime] sys_gettime,
|
|
[SYS_lab6_set_priority] sys_lab6_set_priority,
|
|
};
|
|
|
|
#define NUM_SYSCALLS ((sizeof(syscalls)) / (sizeof(syscalls[0])))
|
|
|
|
void
|
|
syscall(void) {
|
|
struct trapframe *tf = current->tf;
|
|
uint32_t arg[5];
|
|
int num = tf->tf_regs.reg_eax;
|
|
if (num >= 0 && num < NUM_SYSCALLS) {
|
|
if (syscalls[num] != NULL) {
|
|
arg[0] = tf->tf_regs.reg_edx;
|
|
arg[1] = tf->tf_regs.reg_ecx;
|
|
arg[2] = tf->tf_regs.reg_ebx;
|
|
arg[3] = tf->tf_regs.reg_edi;
|
|
arg[4] = tf->tf_regs.reg_esi;
|
|
tf->tf_regs.reg_eax = syscalls[num](arg);
|
|
return ;
|
|
}
|
|
}
|
|
print_trapframe(tf);
|
|
panic("undefined syscall %d, pid = %d, name = %s.\n",
|
|
num, current->pid, current->name);
|
|
}
|
|
|