1 files changed, 0 insertions, 145 deletions
diff --git a/syscall.c b/syscall.c
deleted file mode 100644
index ee85261..0000000
--- a/syscall.c
+++ /dev/null
@@ -1,145 +0,0 @@
-#include "types.h"
-#include "defs.h"
-#include "param.h"
-#include "memlayout.h"
-#include "mmu.h"
-#include "proc.h"
-#include "x86.h"
-#include "syscall.h"
-
-// User code makes a system call with INT T_SYSCALL.
-// System call number in %eax.
-// Arguments on the stack, from the user call to the C
-// library system call function. The saved user %esp points
-// to a saved program counter, and then the first argument.
-
-// Fetch the int at addr from the current process.
-int
-fetchint(uint addr, int *ip)
-{
-  struct proc *curproc = myproc();
-
-  if(addr >= curproc->sz || addr+4 > curproc->sz)
-    return -1;
-  *ip = *(int*)(addr);
-  return 0;
-}
-
-// Fetch the nul-terminated string at addr from the current process.
-// Doesn't actually copy the string - just sets *pp to point at it.
-// Returns length of string, not including nul.
-int
-fetchstr(uint addr, char **pp)
-{
-  char *s, *ep;
-  struct proc *curproc = myproc();
-
-  if(addr >= curproc->sz)
-    return -1;
-  *pp = (char*)addr;
-  ep = (char*)curproc->sz;
-  for(s = *pp; s < ep; s++){
-    if(*s == 0)
-      return s - *pp;
-  }
-  return -1;
-}
-
-// Fetch the nth 32-bit system call argument.
-int
-argint(int n, int *ip)
-{
-  return fetchint((myproc()->tf->esp) + 4 + 4*n, ip);
-}
-
-// Fetch the nth word-sized system call argument as a pointer
-// to a block of memory of size bytes.  Check that the pointer
-// lies within the process address space.
-int
-argptr(int n, char **pp, int size)
-{
-  int i;
-  struct proc *curproc = myproc();
- 
-  if(argint(n, &i) < 0)
-    return -1;
-  if(size < 0 || (uint)i >= curproc->sz || (uint)i+size > curproc->sz)
-    return -1;
-  *pp = (char*)i;
-  return 0;
-}
-
-// Fetch the nth word-sized system call argument as a string pointer.
-// Check that the pointer is valid and the string is nul-terminated.
-// (There is no shared writable memory, so the string can't change
-// between this check and being used by the kernel.)
-int
-argstr(int n, char **pp)
-{
-  int addr;
-  if(argint(n, &addr) < 0)
-    return -1;
-  return fetchstr(addr, pp);
-}
-
-extern int sys_chdir(void);
-extern int sys_close(void);
-extern int sys_dup(void);
-extern int sys_exec(void);
-extern int sys_exit(void);
-extern int sys_fork(void);
-extern int sys_fstat(void);
-extern int sys_getpid(void);
-extern int sys_kill(void);
-extern int sys_link(void);
-extern int sys_mkdir(void);
-extern int sys_mknod(void);
-extern int sys_open(void);
-extern int sys_pipe(void);
-extern int sys_read(void);
-extern int sys_sbrk(void);
-extern int sys_sleep(void);
-extern int sys_unlink(void);
-extern int sys_wait(void);
-extern int sys_write(void);
-extern int sys_uptime(void);
-
-static int (*syscalls[])(void) = {
-[SYS_fork]    sys_fork,
-[SYS_exit]    sys_exit,
-[SYS_wait]    sys_wait,
-[SYS_pipe]    sys_pipe,
-[SYS_read]    sys_read,
-[SYS_kill]    sys_kill,
-[SYS_exec]    sys_exec,
-[SYS_fstat]   sys_fstat,
-[SYS_chdir]   sys_chdir,
-[SYS_dup]     sys_dup,
-[SYS_getpid]  sys_getpid,
-[SYS_sbrk]    sys_sbrk,
-[SYS_sleep]   sys_sleep,
-[SYS_uptime]  sys_uptime,
-[SYS_open]    sys_open,
-[SYS_write]   sys_write,
-[SYS_mknod]   sys_mknod,
-[SYS_unlink]  sys_unlink,
-[SYS_link]    sys_link,
-[SYS_mkdir]   sys_mkdir,
-[SYS_close]   sys_close,
-};
-
-void
-syscall(void)
-{
-  int num;
-  struct proc *curproc = myproc();
-
-  num = curproc->tf->eax;
-  if(num > 0 && num < NELEM(syscalls) && syscalls[num]) {
-    curproc->tf->eax = syscalls[num]();
-  } else {
-    cprintf("%d %s: unknown sys call %d\n",
-            curproc->pid, curproc->name, num);
-    curproc->tf->eax = -1;
-  }
-}