arch/parisc/include/asm/syscall.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* syscall.h */
   3
   4 #ifndef _ASM_PARISC_SYSCALL_H_
   5 #define _ASM_PARISC_SYSCALL_H_
   6
   7 #include <uapi/linux/audit.h>
   8 #include <linux/compat.h>
   9 #include <linux/err.h>
  10 #include <asm/ptrace.h>
  11
  12 #define NR_syscalls (__NR_Linux_syscalls)
  13
  14 static inline long syscall_get_nr(struct task_struct *tsk,
  15                                   struct pt_regs *regs)
  16 {
  17         return regs->gr[20];
  18 }
  19
  20 static inline void syscall_get_arguments(struct task_struct *tsk,
  21                                          struct pt_regs *regs, unsigned int i,
  22                                          unsigned int n, unsigned long *args)
  23 {
  24         BUG_ON(i);
  25
  26         switch (n) {
  27         case 6:
  28                 args[5] = regs->gr[21];
  29         case 5:
  30                 args[4] = regs->gr[22];
  31         case 4:
  32                 args[3] = regs->gr[23];
  33         case 3:
  34                 args[2] = regs->gr[24];
  35         case 2:
  36                 args[1] = regs->gr[25];
  37         case 1:
  38                 args[0] = regs->gr[26];
  39         case 0:
  40                 break;
  41         default:
  42                 BUG();
  43         }
  44 }
  45
  46 static inline long syscall_get_return_value(struct task_struct *task,
  47                                                 struct pt_regs *regs)
  48 {
  49         return regs->gr[28];
  50 }
  51
  52 static inline void syscall_set_return_value(struct task_struct *task,
  53                                             struct pt_regs *regs,
  54                                             int error, long val)
  55 {
  56         regs->gr[28] = error ? error : val;
  57 }
  58
  59 static inline void syscall_rollback(struct task_struct *task,
  60                                     struct pt_regs *regs)
  61 {
  62         /* do nothing */
  63 }
  64
  65 static inline int syscall_get_arch(void)
  66 {
  67         int arch = AUDIT_ARCH_PARISC;
  68 #ifdef CONFIG_64BIT
  69         if (!is_compat_task())
  70                 arch = AUDIT_ARCH_PARISC64;
  71 #endif
  72         return arch;
  73 }
  74 #endif /*_ASM_PARISC_SYSCALL_H_*/