x86: syscall_get_nr returns int (18c1e2c8) · Commits · 戴 / test

arch/x86/include/asm/syscall.h

+7 −7

Original line number	Diff line number	Diff line
		/*
		* Access to user system call parameters and results
		*
		* Copyright (C) 2008 Red Hat, Inc. All rights reserved.
		* Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved.
		*
		* This copyrighted material is made available to anyone wishing to use,
		* modify, copy, or redistribute it subject to the terms and conditions
		@@ -16,13 +16,13 @@
		#include <linux/sched.h>
		#include <linux/err.h>

		static inline long syscall_get_nr(struct task_struct *task,
		struct pt_regs *regs)
		{
		/*
		* We always sign-extend a -1 value being set here,
		* so this is always either -1L or a syscall number.
		* Only the low 32 bits of orig_ax are meaningful, so we return int.
		* This importantly ignores the high bits on 64-bit, so comparisons
		* sign-extend the low 32 bits.
		*/
		static inline int syscall_get_nr(struct task_struct task, struct pt_regs regs)
		{
		return regs->orig_ax;
		}