| 1 | |
| 2 | * This file is subject to the terms and conditions of the GNU General Public
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| 3 | * License. See the file "COPYING" in the main directory of this archive
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| 4 | * for more details.
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| 5 | *
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| 6 | * Copyright (C) 2001 - 2007 Tensilica Inc.
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| 7 | * Copyright (C) 2018 Cadence Design Systems Inc.
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| 8 |
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| 9 |
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| 10 | #ifndef _ASM_SYSCALL_H
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| 11 | #define _ASM_SYSCALL_H
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| 12 |
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| 13 | #include <linux/err.h>
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| 14 | #include <asm/ptrace.h>
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| 15 | #include <uapi/linux/audit.h>
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| 16 |
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| 17 | static inline int syscall_get_arch(struct task_struct *task)
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| 18 | {
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| 19 | return AUDIT_ARCH_XTENSA;
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| 20 | }
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| 21 |
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| 22 | typedef void (*syscall_t)(void);
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| 23 | extern syscall_t sys_call_table[];
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| 24 |
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| 25 | static inline long syscall_get_nr(struct task_struct *task,
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| 26 | struct pt_regs *regs)
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| 27 | {
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| 28 | return regs->syscall;
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| 29 | }
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| 30 |
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| 31 | static inline void syscall_set_nr(struct task_struct *task,
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| 32 | struct pt_regs *regs,
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| 33 | int nr)
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| 34 | {
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| 35 | regs->syscall = nr;
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| 36 | }
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| 37 |
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| 38 | static inline void syscall_rollback(struct task_struct *task,
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| 39 | struct pt_regs *regs)
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| 40 | {
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| 41 |
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| 42 | }
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| 43 |
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| 44 | static inline long syscall_get_error(struct task_struct *task,
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| 45 | struct pt_regs *regs)
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| 46 | {
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| 47 |
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| 48 | return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
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| 49 | }
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| 50 |
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| 51 | static inline long syscall_get_return_value(struct task_struct *task,
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| 52 | struct pt_regs *regs)
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| 53 | {
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| 54 | return regs->areg[2];
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| 55 | }
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| 56 |
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| 57 | static inline void syscall_set_return_value(struct task_struct *task,
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| 58 | struct pt_regs *regs,
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| 59 | int error, long val)
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| 60 | {
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| 61 | regs->areg[2] = (long) error ? error : val;
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| 62 | }
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| 63 |
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| 64 | #define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
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| 65 |
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| 66 | static inline void syscall_get_arguments(struct task_struct *task,
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| 67 | struct pt_regs *regs,
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| 68 | unsigned long *args)
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| 69 | {
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| 70 | static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
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| 71 | unsigned int i;
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| 72 |
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| 73 | for (i = 0; i < 6; ++i)
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| 74 | args[i] = regs->areg[reg[i]];
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| 75 | }
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| 76 |
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| 77 | static inline void syscall_set_arguments(struct task_struct *task,
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| 78 | struct pt_regs *regs,
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| 79 | const unsigned long *args)
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| 80 | {
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| 81 | static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
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| 82 | unsigned int i;
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| 83 |
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| 84 | for (i = 0; i < 6; ++i)
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| 85 | regs->areg[reg[i]] = args[i];
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| 86 | }
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| 87 |
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| 88 | asmlinkage long xtensa_rt_sigreturn(void);
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| 89 | asmlinkage long xtensa_shmat(int, char __user *, int);
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| 90 | asmlinkage long xtensa_fadvise64_64(int, int,
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| 91 | unsigned long long, unsigned long long);
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| 92 |
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| 93 | #endif
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