projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 3547cdb1 | 1 | /* |
| 3547cdb1 CZ |
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. | |
| 58b17c55 | 7 | * Copyright (C) 2018 Cadence Design Systems Inc. |
| 3547cdb1 CZ |
8 | */ |
| 9 | ||
| 58b17c55 MF |
10 | #ifndef _ASM_SYSCALL_H |
| 11 | #define _ASM_SYSCALL_H | |
| 12 | ||
| 9f24f3c1 MF |
13 | #include <linux/err.h> |
| 14 | #include <asm/ptrace.h> | |
| 98c3115a DL |
15 | #include <uapi/linux/audit.h> |
| 16 | ||
| 16add411 | 17 | static inline int syscall_get_arch(struct task_struct *task) |
| 98c3115a DL |
18 | { |
| 19 | return AUDIT_ARCH_XTENSA; | |
| 20 | } | |
| 21 | ||
| af5395c2 MF |
22 | typedef void (*syscall_t)(void); |
| 23 | extern syscall_t sys_call_table[]; | |
| 24 | ||
| 9f24f3c1 MF |
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_rollback(struct task_struct *task, | |
| 32 | struct pt_regs *regs) | |
| 33 | { | |
| 34 | /* Do nothing. */ | |
| 35 | } | |
| 36 | ||
| 37 | static inline long syscall_get_error(struct task_struct *task, | |
| 38 | struct pt_regs *regs) | |
| 39 | { | |
| 40 | /* 0 if syscall succeeded, otherwise -Errorcode */ | |
| 41 | return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0; | |
| 42 | } | |
| 43 | ||
| 44 | static inline long syscall_get_return_value(struct task_struct *task, | |
| 45 | struct pt_regs *regs) | |
| 46 | { | |
| 47 | return regs->areg[2]; | |
| 48 | } | |
| 49 | ||
| 50 | static inline void syscall_set_return_value(struct task_struct *task, | |
| 51 | struct pt_regs *regs, | |
| 52 | int error, long val) | |
| 53 | { | |
| 54 | regs->areg[0] = (long) error ? error : val; | |
| 55 | } | |
| 56 | ||
| 57 | #define SYSCALL_MAX_ARGS 6 | |
| 58 | #define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9} | |
| 59 | ||
| 60 | static inline void syscall_get_arguments(struct task_struct *task, | |
| 61 | struct pt_regs *regs, | |
| 62 | unsigned int i, unsigned int n, | |
| 63 | unsigned long *args) | |
| 64 | { | |
| 65 | static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS; | |
| 66 | unsigned int j; | |
| 67 | ||
| 68 | if (n == 0) | |
| 69 | return; | |
| 70 | ||
| 71 | WARN_ON_ONCE(i + n > SYSCALL_MAX_ARGS); | |
| 72 | ||
| 73 | for (j = 0; j < n; ++j) { | |
| 74 | if (i + j < SYSCALL_MAX_ARGS) | |
| 75 | args[j] = regs->areg[reg[i + j]]; | |
| 76 | else | |
| 77 | args[j] = 0; | |
| 78 | } | |
| 79 | } | |
| 80 | ||
| 81 | static inline void syscall_set_arguments(struct task_struct *task, | |
| 82 | struct pt_regs *regs, | |
| 83 | unsigned int i, unsigned int n, | |
| 84 | const unsigned long *args) | |
| 85 | { | |
| 86 | static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS; | |
| 87 | unsigned int j; | |
| 88 | ||
| 89 | if (n == 0) | |
| 90 | return; | |
| 91 | ||
| 92 | if (WARN_ON_ONCE(i + n > SYSCALL_MAX_ARGS)) { | |
| 93 | if (i < SYSCALL_MAX_ARGS) | |
| 94 | n = SYSCALL_MAX_ARGS - i; | |
| 95 | else | |
| 96 | return; | |
| 97 | } | |
| 98 | ||
| 99 | for (j = 0; j < n; ++j) | |
| 100 | regs->areg[reg[i + j]] = args[j]; | |
| 101 | } | |
| 58b17c55 | 102 | |
| fc4fb2ad | 103 | asmlinkage long xtensa_rt_sigreturn(struct pt_regs*); |
| 3547cdb1 | 104 | asmlinkage long xtensa_shmat(int, char __user *, int); |
| bc671aa9 CZ |
105 | asmlinkage long xtensa_fadvise64_64(int, int, |
| 106 | unsigned long long, unsigned long long); | |
| 3547cdb1 | 107 | |
| 58b17c55 | 108 | #endif |