/Ethereal-msm8939-beta9/arch/microblaze/include/asm/syscall.h

https://bitbucket.org/MilosStamenkovic95/etherealos · C Header · 102 lines · 88 code · 12 blank · 2 comment · 5 complexity · 3369c67083a5388c0f2c900e3593dd8e MD5 · raw file 

    

  1. #ifndef __ASM_MICROBLAZE_SYSCALL_H
    2. 

  2. #define __ASM_MICROBLAZE_SYSCALL_H
    3. 

  3. 

  4. #include <linux/kernel.h>
    5. 

  5. #include <linux/sched.h>
    6. 

  6. #include <asm/ptrace.h>
    7. 

  7. 

  8. /* The system call number is given by the user in R12 */
    9. 

  9. static inline long syscall_get_nr(struct task_struct *task,
    10. 

  10. 				  struct pt_regs *regs)
    11. 

  11. {
    12. 

  12. 	return regs->r12;
    13. 

  13. }
    14. 

  14. 

  15. static inline void syscall_rollback(struct task_struct *task,
    16. 

  16. 				    struct pt_regs *regs)
    17. 

  17. {
    18. 

  18. 	/* TODO.  */
    19. 

  19. }
    20. 

  20. 

  21. static inline long syscall_get_error(struct task_struct *task,
    22. 

  22. 				     struct pt_regs *regs)
    23. 

  23. {
    24. 

  24. 	return IS_ERR_VALUE(regs->r3) ? regs->r3 : 0;
    25. 

  25. }
    26. 

  26. 

  27. static inline long syscall_get_return_value(struct task_struct *task,
    28. 

  28. 					    struct pt_regs *regs)
    29. 

  29. {
    30. 

  30. 	return regs->r3;
    31. 

  31. }
    32. 

  32. 

  33. static inline void syscall_set_return_value(struct task_struct *task,
    34. 

  34. 					    struct pt_regs *regs,
    35. 

  35. 					    int error, long val)
    36. 

  36. {
    37. 

  37. 	if (error)
    38. 

  38. 		regs->r3 = -error;
    39. 

  39. 	else
    40. 

  40. 		regs->r3 = val;
    41. 

  41. }
    42. 

  42. 

  43. static inline microblaze_reg_t microblaze_get_syscall_arg(struct pt_regs *regs,
    44. 

  44. 							  unsigned int n)
    45. 

  45. {
    46. 

  46. 	switch (n) {
    47. 

  47. 	case 5: return regs->r10;
    48. 

  48. 	case 4: return regs->r9;
    49. 

  49. 	case 3: return regs->r8;
    50. 

  50. 	case 2: return regs->r7;
    51. 

  51. 	case 1: return regs->r6;
    52. 

  52. 	case 0: return regs->r5;
    53. 

  53. 	default:
    54. 

  54. 		BUG();
    55. 

  55. 	}
    56. 

  56. 	return ~0;
    57. 

  57. }
    58. 

  58. 

  59. static inline void microblaze_set_syscall_arg(struct pt_regs *regs,
    60. 

  60. 					      unsigned int n,
    61. 

  61. 					      unsigned long val)
    62. 

  62. {
    63. 

  63. 	switch (n) {
    64. 

  64. 	case 5:
    65. 

  65. 		regs->r10 = val;
    66. 

  66. 	case 4:
    67. 

  67. 		regs->r9 = val;
    68. 

  68. 	case 3:
    69. 

  69. 		regs->r8 = val;
    70. 

  70. 	case 2:
    71. 

  71. 		regs->r7 = val;
    72. 

  72. 	case 1:
    73. 

  73. 		regs->r6 = val;
    74. 

  74. 	case 0:
    75. 

  75. 		regs->r5 = val;
    76. 

  76. 	default:
    77. 

  77. 		BUG();
    78. 

  78. 	}
    79. 

  79. }
    80. 

  80. 

  81. static inline void syscall_get_arguments(struct task_struct *task,
    82. 

  82. 					 struct pt_regs *regs,
    83. 

  83. 					 unsigned int i, unsigned int n,
    84. 

  84. 					 unsigned long *args)
    85. 

  85. {
    86. 

  86. 	while (n--)
    87. 

  87. 		*args++ = microblaze_get_syscall_arg(regs, i++);
    88. 

  88. }
    89. 

  89. 

  90. static inline void syscall_set_arguments(struct task_struct *task,
    91. 

  91. 					 struct pt_regs *regs,
    92. 

  92. 					 unsigned int i, unsigned int n,
    93. 

  93. 					 const unsigned long *args)
    94. 

  94. {
    95. 

  95. 	while (n--)
    96. 

  96. 		microblaze_set_syscall_arg(regs, i++, *args++);
    97. 

  97. }
    98. 

  98. 

  99. asmlinkage long do_syscall_trace_enter(struct pt_regs *regs);
    100. 

  100. asmlinkage void do_syscall_trace_leave(struct pt_regs *regs);
    101. 

  101. 

  102. #endif /* __ASM_MICROBLAZE_SYSCALL_H */
    103.