Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2)  * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * License.  See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Copyright (C) 2001 - 2007 Tensilica Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright (C) 2018 Cadence Design Systems Inc.
^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
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <uapi/linux/audit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static inline int syscall_get_arch(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	return AUDIT_ARCH_XTENSA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) typedef void (*syscall_t)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) extern syscall_t sys_call_table[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static inline long syscall_get_nr(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 				  struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	return regs->syscall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static inline void syscall_rollback(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 				    struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	/* Do nothing. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static inline long syscall_get_error(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 				     struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	/* 0 if syscall succeeded, otherwise -Errorcode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
^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 long syscall_get_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) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	return regs->areg[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static inline void syscall_set_return_value(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 					    struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 					    int error, long val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	regs->areg[2] = (long) error ? error : val;
^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) #define SYSCALL_MAX_ARGS 6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^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) 	static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	for (i = 0; i < 6; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 		args[i] = regs->areg[reg[i]];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static inline void syscall_set_arguments(struct task_struct *task,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 					 struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 					 const unsigned long *args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	for (i = 0; i < 6; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 		regs->areg[reg[i]] = args[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) asmlinkage long xtensa_rt_sigreturn(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) asmlinkage long xtensa_shmat(int, char __user *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) asmlinkage long xtensa_fadvise64_64(int, int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 				    unsigned long long, unsigned long long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #endif