1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef __ASM_SYSCALL_H 4 #define __ASM_SYSCALL_H 5 6 #include <linux/sched.h> 7 #include <linux/err.h> 8 #include <abi/regdef.h> 9 #include <uapi/linux/audit.h> 10 11 static inline int 12 syscall_get_nr(struct task_struct *task, struct pt_regs *regs) 13 { 14 return regs_syscallid(regs); 15 } 16 17 static inline void 18 syscall_rollback(struct task_struct *task, struct pt_regs *regs) 19 { 20 regs->a0 = regs->orig_a0; 21 } 22 23 static inline long 24 syscall_get_error(struct task_struct *task, struct pt_regs *regs) 25 { 26 unsigned long error = regs->a0; 27 28 return IS_ERR_VALUE(error) ? error : 0; 29 } 30 31 static inline long 32 syscall_get_return_value(struct task_struct *task, struct pt_regs *regs) 33 { 34 return regs->a0; 35 } 36 37 static inline void 38 syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, 39 int error, long val) 40 { 41 regs->a0 = (long) error ?: val; 42 } 43 44 static inline void 45 syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, 46 unsigned long *args) 47 { 48 args[0] = regs->orig_a0; 49 args++; 50 memcpy(args, ®s->a1, 5 * sizeof(args[0])); 51 } 52 53 static inline void 54 syscall_set_arguments(struct task_struct *task, struct pt_regs *regs, 55 const unsigned long *args) 56 { 57 regs->orig_a0 = args[0]; 58 args++; 59 memcpy(®s->a1, args, 5 * sizeof(regs->a1)); 60 } 61 62 static inline int 63 syscall_get_arch(void) 64 { 65 return AUDIT_ARCH_CSKY; 66 } 67 68 #endif /* __ASM_SYSCALL_H */ 69