/arch/sh/include/asm/syscall_64.h

http://github.com/mirrors/linux · C Header · 75 lines · 58 code · 11 blank · 6 comment · 1 complexity · 025d8b18f11fa914e05b6778520a6ca9 MD5 · raw file 

    

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

  2. #ifndef __ASM_SH_SYSCALL_64_H
    3. 

  3. #define __ASM_SH_SYSCALL_64_H
    4. 

  4. 

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

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

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

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

  9. 

  10. /* The system call number is given by the user in R9 */
    11. 

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

  12. 				  struct pt_regs *regs)
    13. 

  13. {
    14. 

  14. 	return (regs->syscall_nr >= 0) ? regs->regs[9] : -1L;
    15. 

  15. }
    16. 

  16. 

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

  18. 				    struct pt_regs *regs)
    19. 

  19. {
    20. 

  20. 	/*
    21. 

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

  22. 	 * save away the original R9 value anywhere.
    23. 

  23. 	 */
    24. 

  24. }
    25. 

  25. 

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

  27. 				     struct pt_regs *regs)
    28. 

  28. {
    29. 

  29. 	return IS_ERR_VALUE(regs->regs[9]) ? regs->regs[9] : 0;
    30. 

  30. }
    31. 

  31. 

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

  33. 					    struct pt_regs *regs)
    34. 

  34. {
    35. 

  35. 	return regs->regs[9];
    36. 

  36. }
    37. 

  37. 

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

  39. 					    struct pt_regs *regs,
    40. 

  40. 					    int error, long val)
    41. 

  41. {
    42. 

  42. 	if (error)
    43. 

  43. 		regs->regs[9] = -error;
    44. 

  44. 	else
    45. 

  45. 		regs->regs[9] = val;
    46. 

  46. }
    47. 

  47. 

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

  49. 					 struct pt_regs *regs,
    50. 

  50. 					 unsigned long *args)
    51. 

  51. {
    52. 

  52. 	memcpy(args, &regs->regs[2], 6 * sizeof(args[0]));
    53. 

  53. }
    54. 

  54. 

  55. static inline void syscall_set_arguments(struct task_struct *task,
    56. 

  56. 					 struct pt_regs *regs,
    57. 

  57. 					 const unsigned long *args)
    58. 

  58. {
    59. 

  59. 	memcpy(&regs->regs[2], args, 6 * sizeof(args[0]));
    60. 

  60. }
    61. 

  61. 

  62. static inline int syscall_get_arch(struct task_struct *task)
    63. 

  63. {
    64. 

  64. 	int arch = AUDIT_ARCH_SH;
    65. 

  65. 

  66. #ifdef CONFIG_64BIT
    67. 

  67. 	arch |= __AUDIT_ARCH_64BIT;
    68. 

  68. #endif
    69. 

  69. #ifdef CONFIG_CPU_LITTLE_ENDIAN
    70. 

  70. 	arch |= __AUDIT_ARCH_LE;
    71. 

  71. #endif
    72. 

  72. 

  73. 	return arch;
    74. 

  74. }
    75. 

  75. #endif /* __ASM_SH_SYSCALL_64_H */
    76.