2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2001 - 2007 Tensilica Inc.
7 * Copyright (C) 2018 Cadence Design Systems Inc.
10 #ifndef _ASM_SYSCALL_H
11 #define _ASM_SYSCALL_H
13 #include <linux/err.h>
14 #include <asm/ptrace.h>
15 #include <uapi/linux/audit.h>
17 static inline int syscall_get_arch(void)
19 return AUDIT_ARCH_XTENSA;
22 typedef void (*syscall_t)(void);
23 extern syscall_t sys_call_table[];
25 static inline long syscall_get_nr(struct task_struct *task,
31 static inline void syscall_rollback(struct task_struct *task,
37 static inline long syscall_get_error(struct task_struct *task,
40 /* 0 if syscall succeeded, otherwise -Errorcode */
41 return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
44 static inline long syscall_get_return_value(struct task_struct *task,
50 static inline void syscall_set_return_value(struct task_struct *task,
54 regs->areg[0] = (long) error ? error : val;
57 #define SYSCALL_MAX_ARGS 6
58 #define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
60 static inline void syscall_get_arguments(struct task_struct *task,
62 unsigned int i, unsigned int n,
65 static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
71 WARN_ON_ONCE(i + n > SYSCALL_MAX_ARGS);
73 for (j = 0; j < n; ++j) {
74 if (i + j < SYSCALL_MAX_ARGS)
75 args[j] = regs->areg[reg[i + j]];
81 static inline void syscall_set_arguments(struct task_struct *task,
83 unsigned int i, unsigned int n,
84 const unsigned long *args)
86 static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
92 if (WARN_ON_ONCE(i + n > SYSCALL_MAX_ARGS)) {
93 if (i < SYSCALL_MAX_ARGS)
94 n = SYSCALL_MAX_ARGS - i;
99 for (j = 0; j < n; ++j)
100 regs->areg[reg[i + j]] = args[j];
103 asmlinkage long xtensa_rt_sigreturn(struct pt_regs*);
104 asmlinkage long xtensa_shmat(int, char __user *, int);
105 asmlinkage long xtensa_fadvise64_64(int, int,
106 unsigned long long, unsigned long long);