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78 lines
1.8 KiB
78 lines
1.8 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Access to user system call parameters and results |
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* |
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* Copyright (C) 2008 Intel Corp. Shaohua Li <[email protected]> |
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* |
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* See asm-generic/syscall.h for descriptions of what we must do here. |
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*/ |
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#ifndef _ASM_SYSCALL_H |
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#define _ASM_SYSCALL_H 1 |
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#include <uapi/linux/audit.h> |
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#include <linux/sched.h> |
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#include <linux/err.h> |
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static inline long syscall_get_nr(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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if ((long)regs->cr_ifs < 0) /* Not a syscall */ |
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return -1; |
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return regs->r15; |
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} |
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static inline void syscall_rollback(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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/* do nothing */ |
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} |
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static inline long syscall_get_error(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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return regs->r10 == -1 ? -regs->r8:0; |
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} |
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static inline long syscall_get_return_value(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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return regs->r8; |
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} |
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static inline void syscall_set_return_value(struct task_struct *task, |
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struct pt_regs *regs, |
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int error, long val) |
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{ |
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if (error) { |
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/* error < 0, but ia64 uses > 0 return value */ |
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regs->r8 = -error; |
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regs->r10 = -1; |
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} else { |
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regs->r8 = val; |
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regs->r10 = 0; |
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} |
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} |
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extern void ia64_syscall_get_set_arguments(struct task_struct *task, |
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struct pt_regs *regs, unsigned long *args, int rw); |
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static inline void syscall_get_arguments(struct task_struct *task, |
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struct pt_regs *regs, |
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unsigned long *args) |
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{ |
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ia64_syscall_get_set_arguments(task, regs, args, 0); |
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} |
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static inline void syscall_set_arguments(struct task_struct *task, |
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struct pt_regs *regs, |
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unsigned long *args) |
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{ |
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ia64_syscall_get_set_arguments(task, regs, args, 1); |
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} |
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static inline int syscall_get_arch(struct task_struct *task) |
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{ |
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return AUDIT_ARCH_IA64; |
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} |
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#endif /* _ASM_SYSCALL_H */
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