Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Access to user system call parameters and results
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2008 Intel Corp.  Shaohua Li <shaohua.li@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * See asm-generic/syscall.h for descriptions of what we must do here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #ifndef _ASM_SYSCALL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define _ASM_SYSCALL_H	1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <uapi/linux/audit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static inline long syscall_get_nr(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 				  struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	if ((long)regs->cr_ifs < 0) /* Not a syscall */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	return regs->r15;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static inline void syscall_rollback(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 				    struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	/* do nothing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static inline long syscall_get_error(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 				     struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	return regs->r10 == -1 ? -regs->r8:0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static inline long syscall_get_return_value(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 					    struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	return regs->r8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static inline void syscall_set_return_value(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 					    struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 					    int error, long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		/* error < 0, but ia64 uses > 0 return value */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		regs->r8 = -error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		regs->r10 = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		regs->r8 = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		regs->r10 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) extern void ia64_syscall_get_set_arguments(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	struct pt_regs *regs, unsigned long *args, int rw);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static inline void syscall_get_arguments(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 					 struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 					 unsigned long *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	ia64_syscall_get_set_arguments(task, regs, args, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static inline void syscall_set_arguments(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 					 struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 					 unsigned long *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	ia64_syscall_get_set_arguments(task, regs, args, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static inline int syscall_get_arch(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	return AUDIT_ARCH_IA64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #endif	/* _ASM_SYSCALL_H */