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tools/nolibc/errno: extract errno.h from sys.h

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This allows us to provide a minimal errno.h to ease porting applications
that use it.

Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Willy Tarreau 2022-02-07 17:23:48 +01:00 committed by Paul E. McKenney
parent 8d304a3740
commit 45a794bf7c
3 changed files with 29 additions and 16 deletions
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27
tools/include/nolibc/errno.h Normal file
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@ -0,0 +1,27 @@
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
/*
* Minimal errno definitions for NOLIBC
* Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
*/
#ifndef _NOLIBC_ERRNO_H
#define _NOLIBC_ERRNO_H
#include <asm/errno.h>
/* this way it will be removed if unused */
static int errno;
#ifndef NOLIBC_IGNORE_ERRNO
#define SET_ERRNO(v) do { errno = (v); } while (0)
#else
#define SET_ERRNO(v) do { } while (0)
#endif
/* errno codes all ensure that they will not conflict with a valid pointer
* because they all correspond to the highest addressable memory page.
*/
#define MAX_ERRNO 4095
#endif /* _NOLIBC_ERRNO_H */

1
tools/include/nolibc/stdio.h
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@ -11,6 +11,7 @@
#include "std.h"
#include "arch.h"
#include "errno.h"
#include "types.h"
#include "sys.h"
#include "stdlib.h"

17
tools/include/nolibc/sys.h
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@ -14,29 +14,14 @@
#include <asm/unistd.h>
#include <asm/signal.h> // for SIGCHLD
#include <asm/ioctls.h>
#include <asm/errno.h>
#include <linux/fs.h>
#include <linux/loop.h>
#include <linux/time.h>
#include "arch.h"
#include "errno.h"
#include "types.h"
/* this way it will be removed if unused */
static int errno;
#ifndef NOLIBC_IGNORE_ERRNO
#define SET_ERRNO(v) do { errno = (v); } while (0)
#else
#define SET_ERRNO(v) do { } while (0)
#endif
/* errno codes all ensure that they will not conflict with a valid pointer
* because they all correspond to the highest addressable memory page.
*/
#define MAX_ERRNO 4095
/* Functions in this file only describe syscalls. They're declared static so
* that the compiler usually decides to inline them while still being allowed