/arch/sh/include/asm/syscall_32.h

http://github.com/mirrors/linux · C Header · 84 lines · 66 code · 11 blank · 7 comment · 1 complexity · 464658c99a9a6fc06fa5638db8d6b224 MD5 · raw file 

    

  1. /* SPDX-License-Identifier: GPL-2.0 */
    2. 

  2. #ifndef __ASM_SH_SYSCALL_32_H
    3. 

  3. #define __ASM_SH_SYSCALL_32_H
    4. 

  4. 

  5. #include <uapi/linux/audit.h>
    6. 

  6. #include <linux/kernel.h>
    7. 

  7. #include <linux/sched.h>
    8. 

  8. #include <linux/err.h>
    9. 

  9. #include <asm/ptrace.h>
    10. 

  10. 

  11. /* The system call number is given by the user in R3 */
    12. 

  12. static inline long syscall_get_nr(struct task_struct *task,
    13. 

  13. 				  struct pt_regs *regs)
    14. 

  14. {
    15. 

  15. 	return (regs->tra >= 0) ? regs->regs[3] : -1L;
    16. 

  16. }
    17. 

  17. 

  18. static inline void syscall_rollback(struct task_struct *task,
    19. 

  19. 				    struct pt_regs *regs)
    20. 

  20. {
    21. 

  21. 	/*
    22. 

  22. 	 * XXX: This needs some thought. On SH we don't
    23. 

  23. 	 * save away the original r0 value anywhere.
    24. 

  24. 	 */
    25. 

  25. }
    26. 

  26. 

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

  28. 				     struct pt_regs *regs)
    29. 

  29. {
    30. 

  30. 	return IS_ERR_VALUE(regs->regs[0]) ? regs->regs[0] : 0;
    31. 

  31. }
    32. 

  32. 

  33. static inline long syscall_get_return_value(struct task_struct *task,
    34. 

  34. 					    struct pt_regs *regs)
    35. 

  35. {
    36. 

  36. 	return regs->regs[0];
    37. 

  37. }
    38. 

  38. 

  39. static inline void syscall_set_return_value(struct task_struct *task,
    40. 

  40. 					    struct pt_regs *regs,
    41. 

  41. 					    int error, long val)
    42. 

  42. {
    43. 

  43. 	if (error)
    44. 

  44. 		regs->regs[0] = -error;
    45. 

  45. 	else
    46. 

  46. 		regs->regs[0] = val;
    47. 

  47. }
    48. 

  48. 

  49. static inline void syscall_get_arguments(struct task_struct *task,
    50. 

  50. 					 struct pt_regs *regs,
    51. 

  51. 					 unsigned long *args)
    52. 

  52. {
    53. 

  53. 

  54. 	/* Argument pattern is: R4, R5, R6, R7, R0, R1 */
    55. 

  55. 	args[5] = regs->regs[1];
    56. 

  56. 	args[4] = regs->regs[0];
    57. 

  57. 	args[3] = regs->regs[7];
    58. 

  58. 	args[2] = regs->regs[6];
    59. 

  59. 	args[1] = regs->regs[5];
    60. 

  60. 	args[0] = regs->regs[4];
    61. 

  61. }
    62. 

  62. 

  63. static inline void syscall_set_arguments(struct task_struct *task,
    64. 

  64. 					 struct pt_regs *regs,
    65. 

  65. 					 const unsigned long *args)
    66. 

  66. {
    67. 

  67. 	regs->regs[1] = args[5];
    68. 

  68. 	regs->regs[0] = args[4];
    69. 

  69. 	regs->regs[7] = args[3];
    70. 

  70. 	regs->regs[6] = args[2];
    71. 

  71. 	regs->regs[5] = args[1];
    72. 

  72. 	regs->regs[4] = args[0];
    73. 

  73. }
    74. 

  74. 

  75. static inline int syscall_get_arch(struct task_struct *task)
    76. 

  76. {
    77. 

  77. 	int arch = AUDIT_ARCH_SH;
    78. 

  78. 

  79. #ifdef CONFIG_CPU_LITTLE_ENDIAN
    80. 

  80. 	arch |= __AUDIT_ARCH_LE;
    81. 

  81. #endif
    82. 

  82. 	return arch;
    83. 

  83. }
    84. 

  84. #endif /* __ASM_SH_SYSCALL_32_H */
    85.