linux-kernel - [PATCH nolibc 36/61] tools/nolibc/errno: extract errno.h from sys.h

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220419004225.3952530-36-paulmck@kernel.org>
Date:   Mon, 18 Apr 2022 17:42:00 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     gwml@...r.gnuweeb.org, kernel-team@...com, w@....eu,
        Willy Tarreau <w@....eu>,
        "Paul E . McKenney" <paulmck@...nel.org>
Subject: [PATCH nolibc 36/61] tools/nolibc/errno: extract errno.h from sys.h

From: Willy Tarreau <w@....eu>

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

Signed-off-by: Willy Tarreau <w@....eu>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 tools/include/nolibc/errno.h | 27 +++++++++++++++++++++++++++
 tools/include/nolibc/stdio.h |  1 +
 tools/include/nolibc/sys.h   | 17 +----------------
 3 files changed, 29 insertions(+), 16 deletions(-)
 create mode 100644 tools/include/nolibc/errno.h

diff --git a/tools/include/nolibc/errno.h b/tools/include/nolibc/errno.h
new file mode 100644
index 000000000000..06893d6dfb7a
--- /dev/null
+++ b/tools/include/nolibc/errno.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * Minimal errno definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@....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 */
diff --git a/tools/include/nolibc/stdio.h b/tools/include/nolibc/stdio.h
index 5f1cf32470d3..cb4d3ab3a565 100644
--- a/tools/include/nolibc/stdio.h
+++ b/tools/include/nolibc/stdio.h
@@ -11,6 +11,7 @@
 
 #include "std.h"
 #include "arch.h"
+#include "errno.h"
 #include "types.h"
 #include "sys.h"
 #include "stdlib.h"
diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index ef017cc0a580..28437863c63f 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -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
-- 
2.31.1.189.g2e36527f23