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82 lines
1.8 KiB
82 lines
1.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Access to user system call parameters and results |
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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_ARM_SYSCALL_H |
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#define _ASM_ARM_SYSCALL_H |
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#include <uapi/linux/audit.h> /* for AUDIT_ARCH_* */ |
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#include <linux/elf.h> /* for ELF_EM */ |
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#include <linux/err.h> |
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#include <linux/sched.h> |
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#include <asm/unistd.h> |
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#define NR_syscalls (__NR_syscalls) |
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extern const unsigned long sys_call_table[]; |
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static inline int syscall_get_nr(struct task_struct *task, |
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struct pt_regs *regs) |
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{ |
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return task_thread_info(task)->syscall; |
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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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regs->ARM_r0 = regs->ARM_ORIG_r0; |
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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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unsigned long error = regs->ARM_r0; |
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return IS_ERR_VALUE(error) ? error : 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->ARM_r0; |
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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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regs->ARM_r0 = (long) error ? error : val; |
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} |
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#define SYSCALL_MAX_ARGS 7 |
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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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args[0] = regs->ARM_ORIG_r0; |
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args++; |
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memcpy(args, ®s->ARM_r0 + 1, 5 * sizeof(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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const unsigned long *args) |
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{ |
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regs->ARM_ORIG_r0 = args[0]; |
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args++; |
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memcpy(®s->ARM_r0 + 1, args, 5 * sizeof(args[0])); |
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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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/* ARM tasks don't change audit architectures on the fly. */ |
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return AUDIT_ARCH_ARM; |
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} |
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#endif /* _ASM_ARM_SYSCALL_H */
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