1 /* 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 4 * for more details. 5 * 6 * Copyright (C) 2001 - 2007 Tensilica Inc. 7 * Copyright (C) 2018 Cadence Design Systems Inc. 8 */ 9 10 #ifndef _ASM_SYSCALL_H 11 #define _ASM_SYSCALL_H 12 13 #include <linux/err.h> 14 #include <asm/ptrace.h> 15 #include <uapi/linux/audit.h> 16 17 static inline int syscall_get_arch(struct task_struct *task) 18 { 19 return AUDIT_ARCH_XTENSA; 20 } 21 22 typedef void (*syscall_t)(void); 23 extern syscall_t sys_call_table[]; 24 25 static inline long syscall_get_nr(struct task_struct *task, 26 struct pt_regs *regs) 27 { 28 return regs->syscall; 29 } 30 31 static inline void syscall_set_nr(struct task_struct *task, 32 struct pt_regs *regs, 33 int nr) 34 { 35 regs->syscall = nr; 36 } 37 38 static inline void syscall_rollback(struct task_struct *task, 39 struct pt_regs *regs) 40 { 41 /* Do nothing. */ 42 } 43 44 static inline long syscall_get_error(struct task_struct *task, 45 struct pt_regs *regs) 46 { 47 /* 0 if syscall succeeded, otherwise -Errorcode */ 48 return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0; 49 } 50 51 static inline long syscall_get_return_value(struct task_struct *task, 52 struct pt_regs *regs) 53 { 54 return regs->areg[2]; 55 } 56 57 static inline void syscall_set_return_value(struct task_struct *task, 58 struct pt_regs *regs, 59 int error, long val) 60 { 61 regs->areg[2] = (long) error ? error : val; 62 } 63 64 #define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9} 65 66 static inline void syscall_get_arguments(struct task_struct *task, 67 struct pt_regs *regs, 68 unsigned long *args) 69 { 70 static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS; 71 unsigned int i; 72 73 for (i = 0; i < 6; ++i) 74 args[i] = regs->areg[reg[i]]; 75 } 76 77 static inline void syscall_set_arguments(struct task_struct *task, 78 struct pt_regs *regs, 79 const unsigned long *args) 80 { 81 static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS; 82 unsigned int i; 83 84 for (i = 0; i < 6; ++i) 85 regs->areg[reg[i]] = args[i]; 86 } 87 88 asmlinkage long xtensa_rt_sigreturn(void); 89 asmlinkage long xtensa_shmat(int, char __user *, int); 90 asmlinkage long xtensa_fadvise64_64(int, int, 91 unsigned long long, unsigned long long); 92 93 #endif 94