exec.c 1.9 KB

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  1. /*
  2. * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
  3. * Licensed under the GPL
  4. */
  5. #include "linux/slab.h"
  6. #include "linux/smp_lock.h"
  7. #include "linux/ptrace.h"
  8. #include "asm/ptrace.h"
  9. #include "asm/pgtable.h"
  10. #include "asm/tlbflush.h"
  11. #include "asm/uaccess.h"
  12. #include "user_util.h"
  13. #include "kern_util.h"
  14. #include "mem_user.h"
  15. #include "kern.h"
  16. #include "irq_user.h"
  17. #include "tlb.h"
  18. #include "os.h"
  19. #include "choose-mode.h"
  20. #include "mode_kern.h"
  21. void flush_thread(void)
  22. {
  23. arch_flush_thread(&current->thread.arch);
  24. CHOOSE_MODE(flush_thread_tt(), flush_thread_skas());
  25. }
  26. void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
  27. {
  28. CHOOSE_MODE_PROC(start_thread_tt, start_thread_skas, regs, eip, esp);
  29. }
  30. #ifdef CONFIG_TTY_LOG
  31. extern void log_exec(char **argv, void *tty);
  32. #endif
  33. static long execve1(char *file, char __user * __user *argv,
  34. char __user *__user *env)
  35. {
  36. long error;
  37. #ifdef CONFIG_TTY_LOG
  38. struct tty_struct *tty;
  39. mutex_lock(&tty_mutex);
  40. tty = get_current_tty();
  41. if (tty)
  42. log_exec(argv, tty);
  43. mutex_unlock(&tty_mutex);
  44. #endif
  45. error = do_execve(file, argv, env, &current->thread.regs);
  46. if (error == 0){
  47. task_lock(current);
  48. current->ptrace &= ~PT_DTRACE;
  49. #ifdef SUBARCH_EXECVE1
  50. SUBARCH_EXECVE1(&current->thread.regs.regs);
  51. #endif
  52. task_unlock(current);
  53. set_cmdline(current_cmd());
  54. }
  55. return(error);
  56. }
  57. long um_execve(char *file, char __user *__user *argv, char __user *__user *env)
  58. {
  59. long err;
  60. err = execve1(file, argv, env);
  61. if(!err)
  62. do_longjmp(current->thread.exec_buf, 1);
  63. return(err);
  64. }
  65. long sys_execve(char __user *file, char __user *__user *argv,
  66. char __user *__user *env)
  67. {
  68. long error;
  69. char *filename;
  70. lock_kernel();
  71. filename = getname(file);
  72. error = PTR_ERR(filename);
  73. if (IS_ERR(filename)) goto out;
  74. error = execve1(filename, argv, env);
  75. putname(filename);
  76. out:
  77. unlock_kernel();
  78. return(error);
  79. }