int waitpid(int pid, int *store)
{
return sys_wait(pid, store);
}
void trap_kernel_handler(struct user_context *user_ctx)
{
_debug("...... in %s, code = %p\n",
__func__, user_ctx->code & ~YALNIX_PREFIX);
switch (user_ctx->code) {
case YALNIX_FORK:
SET_RET(user_ctx, sys_fork(user_ctx));
break;
case YALNIX_EXEC:
sys_exec((char *)user_ctx->regs[0], (char **)user_ctx->regs[1],
user_ctx);
break;
case YALNIX_EXIT:
sys_exit(user_ctx->regs[0], user_ctx);
break;
case YALNIX_WAIT:
if (!FROM_USER_SPACE(user_ctx->regs[0])) {
_error("Bad man! Please pass user space pointer!\n");
sys_exit(ERROR, user_ctx);
}
SET_RET(user_ctx, sys_wait((int *)user_ctx->regs[0], user_ctx));
break;
case YALNIX_GETPID:
SET_RET(user_ctx, sys_getpid());
break;
case YALNIX_BRK:
SET_RET(user_ctx, sys_brk(user_ctx->regs[0]));
break;
case YALNIX_DELAY:
SET_RET(user_ctx, sys_delay(user_ctx->regs[0], user_ctx));
break;
case YALNIX_TTY_READ:
if (!FROM_USER_SPACE(user_ctx->regs[1])) {
_error("Bad man! Please pass user space pointer!\n");
sys_exit(ERROR, user_ctx);
}
SET_RET(user_ctx, sys_tty_read(user_ctx->regs[0],
(char *)user_ctx->regs[1],
user_ctx->regs[2],
user_ctx));
break;
case YALNIX_TTY_WRITE:
if (!FROM_USER_SPACE(user_ctx->regs[1])) {
_error("Bad man! Please pass user space pointer!\n");
sys_exit(ERROR, user_ctx);
}
SET_RET(user_ctx, sys_tty_write(user_ctx->regs[0],
(char *)user_ctx->regs[1],
user_ctx->regs[2],
user_ctx));
break;
case YALNIX_PIPE_INIT:
if (!FROM_USER_SPACE(user_ctx->regs[0])) {
_error("Bad man! Please pass user space pointer!\n");
sys_exit(ERROR, user_ctx);
}
SET_RET(user_ctx, sys_pipe_init((unsigned int *)
user_ctx->regs[0]));
break;
case YALNIX_PIPE_READ:
if (!FROM_USER_SPACE(user_ctx->regs[1])) {
_error("Bad man! Please pass user space pointer!\n");
sys_exit(ERROR, user_ctx);
}
SET_RET(user_ctx, sys_pipe_read(user_ctx->regs[0],
(char *)user_ctx->regs[1],
user_ctx->regs[2],
user_ctx));
break;
case YALNIX_PIPE_WRITE:
if (!FROM_USER_SPACE(user_ctx->regs[1])) {
_error("Bad man! Please pass user space pointer!\n");
sys_exit(ERROR, user_ctx);
}
SET_RET(user_ctx, sys_pipe_write(user_ctx->regs[0],
(char *)user_ctx->regs[1],
user_ctx->regs[2],
user_ctx));
break;
case YALNIX_LOCK_INIT:
if (!FROM_USER_SPACE(user_ctx->regs[0])) {
_error("Bad man! Please pass user space pointer!\n");
sys_exit(ERROR, user_ctx);
}
SET_RET(user_ctx, sys_lock_init((unsigned int *)
user_ctx->regs[0]));
break;
case YALNIX_LOCK_ACQUIRE:
SET_RET(user_ctx, sys_lock_acquire(user_ctx->regs[0],
user_ctx));
break;
case YALNIX_LOCK_RELEASE:
SET_RET(user_ctx, sys_lock_release(user_ctx->regs[0]));
break;
case YALNIX_CVAR_INIT:
if (!FROM_USER_SPACE(user_ctx->regs[0])) {
_error("Bad man! Please pass user space pointer!\n");
sys_exit(ERROR, user_ctx);
}
SET_RET(user_ctx, sys_cvar_init((unsigned int *)
user_ctx->regs[0]));
break;
case YALNIX_CVAR_WAIT:
SET_RET(user_ctx, sys_cvar_wait(user_ctx->regs[0],
user_ctx->regs[1],
user_ctx));
break;
case YALNIX_CVAR_SIGNAL:
SET_RET(user_ctx, sys_cvar_signal(user_ctx->regs[0]));
break;
case YALNIX_CVAR_BROADCAST:
SET_RET(user_ctx, sys_cvar_broadcast(user_ctx->regs[0]));
break;
case YALNIX_RECLAIM:
SET_RET(user_ctx, sys_reclaim(user_ctx->regs[0]));
break;
case YALNIX_CUSTOM_0:
SET_RET(user_ctx, sys_fork_share(user_ctx));
break;
}
return;
}
int wait(void)
{
return sys_wait(0, NULL);
}
static void
syscall_handler (struct intr_frame *f)
{
int sys_vector;
sys_vector=*(int *)(f->esp);
switch(sys_vector)
{
case SYS_HALT:
esp_under_phys_base(f, 0);
sys_halt ();
break;
case SYS_EXIT:
if ((void *)((int *)f->esp + 1) >= PHYS_BASE)
sys_exit (-1);
else
sys_exit (*((int *)f->esp + 1));
break;
case SYS_EXEC:
esp_under_phys_base(f, 1);
under_phys_base (*((int **)f->esp + 1));
sys_exec (*((int **)f->esp + 1), f);
break;
case SYS_WAIT:
esp_under_phys_base(f, 1);
sys_wait (*((int *)f->esp + 1), f);
break;
case SYS_CREATE:
if ((void*)*((int **)f->esp + 1) == NULL)
sys_exit(-1);
esp_under_phys_base(f, 2);
under_phys_base (*((int **)f->esp + 1));
sys_create (*((int **)f->esp + 1), *((int *)f->esp + 2), f);
break;
case SYS_REMOVE:
esp_under_phys_base(f, 1);
under_phys_base (*((int **)f->esp + 1));
sys_remove (*((int **)f->esp + 1), f);
break;
case SYS_OPEN:
if ((void*)*((int **)f->esp + 1) == NULL)
sys_exit(-1);
esp_under_phys_base(f, 1);
under_phys_base (*((int **)f->esp + 1));
sys_open (*((int **)f->esp + 1), f);
break;
case SYS_FILESIZE:
esp_under_phys_base(f, 1);
check_fd(*((int *)f->esp + 1), -1, f);
sys_filesize (*((int *)f->esp + 1), f);
break;
case SYS_READ:
esp_under_phys_base(f, 3);
under_phys_base (*((int **)f->esp + 2));
check_fd(*((int *)f->esp + 1), -1, f)
sys_read (*((int *)f->esp + 1), *((int **)f->esp + 2), *((int *)f->esp + 3), f);
break;
case SYS_WRITE:
esp_under_phys_base(f, 3);
under_phys_base (*((int **)f->esp + 2));
check_fd(*((int *)f->esp + 1), -1, f)
sys_write (*((int *)f->esp + 1), *((int **)f->esp + 2), *((int *)f->esp + 3), f);
break;
case SYS_SEEK:
esp_under_phys_base(f, 2);
check_fd(*((int *)f->esp + 1), 0, f)
sys_seek (*((int *)f->esp + 1), *((int *)f->esp + 2), f);
break;
case SYS_TELL:
esp_under_phys_base(f, 1);
check_fd(*((int *)f->esp + 1), 0, f)
sys_tell (*((int *)f->esp + 1), f);
break;
case SYS_CLOSE:
esp_under_phys_base(f, 1);
check_fd(*((int *)f->esp + 1), 0, f)
sys_close (*((int *)f->esp + 1), f);
break;
}
}
unsigned long trapHandler(struct rtrapframe* tf, long cause, long epc, long badaddr)//long* tf
{
uint32_t sp1=read_sp();
uint32_t saved=tf;
long funRe=0;
long returnValue = 0;
long sysNum=(long)(tf->a7);
long args[5];
args[0]=(long)(tf->a0);
args[1]=(long)(tf->a1);
args[2]=(long)(tf->a2);
args[3]=(long)(tf->a3);
args[4]=(long)(tf->a4);
struct rtrapframe *otf = current->tf;
current->tf = tf;
bool ifuser=tf->t0;
funRe=((ifuser==1)?-1:0);
switch(cause)
{
case CAUSE_MACHINE_ECALL:
case CAUSE_SUPERVISOR_ECALL:
{
switch(sysNum)
{
case SYS_exit:
{
cprintf("exit\n");
sys_exit(args[0]);
break;
}
case SYS_write:
{
returnValue=sys_write(sysNum,args[0],args[1],args[2]);
current->tf=otf;
tf->a0 = (uint32_t)returnValue;
//asm volatile("csrw mepc, %0"::"r"(epc+4));
return funRe;
break;
}
case SYS_exec:
{
const char *name = (const char *)args[0];
size_t len = (size_t)args[1];
returnValue = sys_execve(name, len);
funRe=-1;
break;
}
case SYS_S2M:
{
set_mstatus_field(MSTATUS_PRV1,3);
break;
}
case SYS_S2U:
{
set_mstatus_field(MSTATUS_PRV1,0);
break;
}
case SYS_getpid:
{
returnValue = sys_getpid();
break;
}
case SYS_fork:
{
returnValue=sys_fork();
//funRe=-1;
// cprintf("hello\n");
break;
}
case SYS_yield:
{
//cprintf("yield\n");
returnValue=sys_yield();
break;
}
case SYS_wait:
{
returnValue=sys_wait(args[0],args[1]);
break;
}
}
break;
}
case CAUSE_USER_ECALL:
{
switch(sysNum)
{
case SYS_write:
{
returnValue = sys_write(sysNum, args[0], args[1], args[2]);
current->tf=otf;
tf->a0 = (uint32_t)returnValue;
return funRe;
break;
}
case SYS_getpid:
{
returnValue = sys_getpid();
break;
}
case SYS_exit:
{
returnValue = sys_exit(args[0]);
break;
}
}
break;
}
case CAUSE_FAULT_LOAD:
case CAUSE_FAULT_STORE:
case CAUSE_ILLEGAL_INSTRUCTION:
{
extern struct mm_struct *check_mm_struct;
uint32_t mstatus=read_csr(mstatus);
print_pgfault(mstatus,cause,badaddr);
if (check_mm_struct != NULL) {
if(do_pgfault(check_mm_struct, cause, badaddr, mstatus)!=0)
panic("unhandled page fault in function.\n");
}
else
{
if(current==NULL)
panic("unhandled page fault.\n");
do_pgfault(current->mm, cause, badaddr, mstatus);
}
break;
}
default:
{
prvSyscallExit(cause);
}
}
//uint32_t sp3=read_sp();
//cprintf("sysNum=%d\n",sysNum);
//cprintf("sp3=%08x\n",sp3);
current->tf=otf;
tf->a0 = (uint32_t)returnValue;
//asm volatile("csrw mepc, %0"::"r"(epc+4));
return funRe;
}
/* Syscall handler calls the appropriate function. */
static void
syscall_handler (struct intr_frame *f)
{
int ret = 0;
int *syscall_nr = (int *) f->esp;
void *arg1 = (int *) f->esp + 1;
void *arg2 = (int *) f->esp + 2;
void *arg3 = (int *) f->esp + 3;
/* Check validate pointer. */
if (!is_user_vaddr (syscall_nr) || !is_user_vaddr (arg1) ||
!is_user_vaddr (arg2) || !is_user_vaddr (arg3))
sys_exit (-1);
switch (*syscall_nr)
{
case SYS_HALT:
sys_halt ();
break;
case SYS_EXIT:
sys_exit (*(int *) arg1);
break;
case SYS_EXEC:
ret = sys_exec (*(char **) arg1);
break;
case SYS_WAIT:
ret = sys_wait (*(pid_t *) arg1);
break;
case SYS_CREATE:
ret = sys_create (*(char **) arg1, *(unsigned *) arg2);
break;
case SYS_REMOVE:
ret = sys_remove (*(char **) arg1);
break;
case SYS_OPEN:
ret = sys_open (*(char **) arg1);
break;
case SYS_FILESIZE:
ret = sys_filesize (*(int *) arg1);
break;
case SYS_READ:
ret = sys_read (*(int *) arg1, *(void **) arg2, *(unsigned *) arg3);
break;
case SYS_WRITE:
ret = sys_write (*(int *) arg1, *(void **) arg2, *(unsigned *) arg3);
break;
case SYS_SEEK:
sys_seek (*(int *) arg1, *(unsigned *) arg2);
break;
case SYS_TELL:
ret = sys_tell (*(int *) arg1);
break;
case SYS_CLOSE:
sys_close (*(int *) arg1);
break;
default:
printf (" (%s) system call! (%d)\n", thread_name (), *syscall_nr);
sys_exit (-1);
break;
}
f->eax = ret;
}
static void
syscall_handler (struct intr_frame *f)
{
/* Check to see that we can read supplied user memory pointer, using the
check_mem_ptr helper() function, in get_word_from_stack(). If the
check fails, the process is terminated. */
int syscall_number = (int)get_word_on_stack(f, 0);
switch(syscall_number) {
case SYS_HALT:
{
sys_halt();
break;
}
case SYS_EXIT:
{
int status = (int)get_word_on_stack(f, 1);
sys_exit(status);
/* Returns exit status to the kernel. */
f->eax = status;
break;
}
case SYS_EXEC:
{
const char *cmd_line = (const char *)get_word_on_stack(f, 1);
pid_t pid = sys_exec(cmd_line);
/* Returns new processes pid. */
f->eax = pid;
break;
}
case SYS_WAIT:
{
pid_t pid = (pid_t)get_word_on_stack(f, 1);
/* Returns child's exit status (pid argument is pid of this child). */
f->eax = sys_wait(pid);
break;
}
case SYS_CREATE:
{
const char *filename = (const char *)get_word_on_stack(f, 1);
unsigned initial_size = (unsigned)get_word_on_stack(f, 2);
/* Returns true to the kernel if creation is successful. */
f->eax = (int)sys_create(filename, initial_size);
break;
}
case SYS_REMOVE:
{
const char *filename = (const char *)get_word_on_stack(f, 1);
/* Returns true if successful, and false otherwise. */
f->eax = sys_remove(filename);
break;
}
case SYS_OPEN:
{
const char *filename = (const char *)get_word_on_stack(f, 1);
/* Returns file descriptor of opened file, or -1 if it could not
be opened. */
f->eax = sys_open(filename);
break;
}
case SYS_FILESIZE:
{
int fd = (int)get_word_on_stack(f, 1);
/* Returns size of file in bytes. */
f->eax = sys_filesize(fd);
break;
}
case SYS_READ:
{
int fd = (int)get_word_on_stack(f, 1);
void *buffer = (void *)get_word_on_stack(f, 2);
unsigned size = (unsigned)get_word_on_stack(f, 3);
/* Returns number of bytes actually read, or -1 if it could not
be read. */
f->eax = sys_read(fd, buffer, size, f);
break;
}
case SYS_WRITE:
{
int fd = (int)get_word_on_stack(f, 1);
void *buffer = (void *)get_word_on_stack(f, 2);
unsigned size = (unsigned)get_word_on_stack(f, 3);
/* Returns number of bytes written. */
f->eax = sys_write(fd, buffer, size);
break;
}
case SYS_SEEK:
{
int fd = (int)get_word_on_stack(f, 1);
unsigned position = (int)get_word_on_stack(f, 2);
sys_seek(fd, position);
break;
}
case SYS_TELL:
{
int fd = (int)get_word_on_stack(f, 1);
/* Returns the position of the next byte to be read or written in open
file 'fd' (in bytes, from start of file). */
f->eax = sys_tell(fd);
break;
}
case SYS_CLOSE:
{
int fd = (int)get_word_on_stack(f, 1);
sys_close(fd);
break;
}
case SYS_MMAP:
{
int fd = (int)get_word_on_stack(f, 1);
void *addr = (void *)get_word_on_stack(f, 2);
f->eax = sys_mmap(fd, addr);
break;
}
case SYS_MUNMAP:
{
mapid_t mapping = (mapid_t)get_word_on_stack(f, 1);
sys_munmap(mapping);
break;
}
default:
{
NOT_REACHED();
}
}
}
static void
syscall_handler (struct intr_frame *f)
{
int *sys_call;
int *status;
int *fd;
const char **buf;
int *size;
const char **file;
tid_t *pid;
const char **cmd_line;
unsigned *initial_size;
unsigned *position;
void **buffer;
sys_call = (int*) f->esp;
check_ptr(sys_call);
switch(*sys_call) {
case SYS_HALT:
sys_halt ();
break;
case SYS_EXIT:
status = (int *) get_arg_ptr (f->esp, 1);
sys_exit(*status);
NOT_REACHED();
break;
case SYS_EXEC:
cmd_line = (const char **) get_arg_ptr (f->esp, 1);
f->eax = sys_exec (*cmd_line);
break;
case SYS_WAIT:
pid = (tid_t *) get_arg_ptr (f->esp, 1);
f->eax = sys_wait (*pid);
break;
case SYS_CREATE:
file = (const char **) get_arg_ptr (f->esp, 1);
initial_size = (unsigned *) get_arg_ptr (f->esp, 2);
f->eax = sys_create (*file, *initial_size);
break;
case SYS_REMOVE:
file = (const char **) get_arg_ptr (f->esp, 1);
f->eax = sys_remove (*file);
break;
case SYS_OPEN:
file = (const char **) get_arg_ptr(f->esp, 1);
f->eax = sys_open (*file);
break;
case SYS_FILESIZE:
fd = (int *) get_arg_ptr (f->esp, 1);
f->eax = sys_filesize (*fd);
break;
case SYS_READ:
fd = (int *) get_arg_ptr (f->esp, 1);
buffer = (void **) get_arg_ptr (f->esp, 2);
size = (int *) get_arg_ptr (f->esp, 3);
f->eax = sys_read (*fd, *buffer, *size);
break;
case SYS_WRITE:
fd = (int *) get_arg_ptr (f->esp, 1);
buf = (const void **) get_arg_ptr (f->esp, 2);
size = (int *) get_arg_ptr (f->esp, 3);
f->eax = sys_write (*fd, *buf, *size);
break;
case SYS_SEEK:
fd = (int *) get_arg_ptr (f->esp, 1);
position = (unsigned *) get_arg_ptr (f->esp, 2);
sys_seek (*fd, *position);
break;
case SYS_TELL:
fd = (int *) get_arg_ptr (f->esp, 1);
f->eax = sys_tell (*fd);
break;
case SYS_CLOSE:
fd = (int *) get_arg_ptr (f->esp, 1);
sys_close (*fd);
break;
default:
printf ("Unrecognized system call!\n");
thread_exit ();
}
}