release/src-rt-6.x/linux/linux-2.6/arch/um/kernel/tt/exec_user.c

   1 /*
   2  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
   3  * Licensed under the GPL
   4  */
   5
   6 #include <stdio.h>
   7 #include <unistd.h>
   8 #include <stdlib.h>
   9 #include <sched.h>
  10 #include <errno.h>
  11 #include <sys/wait.h>
  12 #include <signal.h>
  13 #include "kern_util.h"
  14 #include "user.h"
  15 #include "ptrace_user.h"
  16 #include "os.h"
  17
  18 void do_exec(int old_pid, int new_pid)
  19 {
  20         unsigned long regs[FRAME_SIZE];
  21         int err;
  22
  23         if((ptrace(PTRACE_ATTACH, new_pid, 0, 0) < 0) ||
  24            (ptrace(PTRACE_CONT, new_pid, 0, 0) < 0))
  25                 tracer_panic("do_exec failed to attach proc - errno = %d",
  26                              errno);
  27
  28         CATCH_EINTR(err = waitpid(new_pid, 0, WUNTRACED));
  29         if (err < 0)
  30                 tracer_panic("do_exec failed to attach proc in waitpid - errno = %d",
  31                              errno);
  32
  33         if(ptrace_getregs(old_pid, regs) < 0)
  34                 tracer_panic("do_exec failed to get registers - errno = %d",
  35                              errno);
  36
  37         os_kill_ptraced_process(old_pid, 0);
  38
  39         if (ptrace(PTRACE_OLDSETOPTIONS, new_pid, 0, (void *)PTRACE_O_TRACESYSGOOD) < 0)
  40                 tracer_panic("do_exec: PTRACE_SETOPTIONS failed, errno = %d", errno);
  41
  42         if(ptrace_setregs(new_pid, regs) < 0)
  43                 tracer_panic("do_exec failed to start new proc - errno = %d",
  44                              errno);
  45 }
  46
  47 /*
  48  * Overrides for Emacs so that we follow Linus's tabbing style.
  49  * Emacs will notice this stuff at the end of the file and automatically
  50  * adjust the settings for this buffer only.  This must remain at the end
  51  * of the file.
  52  * ---------------------------------------------------------------------------
  53  * Local variables:
  54  * c-file-style: "linux"
  55  * End:
  56  */