u-boot/include/errno.h
Marek Behún be1e77f286 sandbox: errno: avoid conflict with libc's errno
When building with LTO, the system libc's `errno` variable used in
arch/sandbox/cpu/os.c conflicts with U-Boot's `errno` (defined in
lib/errno.c) with the following error:
 .../ld: errno@@GLIBC_PRIVATE: TLS definition in /lib64/libc.so.6
         section .tbss mismatches non-TLS reference in
	 /tmp/u-boot.EQlEXz.ltrans0.ltrans.o

To avoid this conflict use different asm label for this variable when
CONFIG_SANDBOX is enabled.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-05-24 14:21:30 -04:00

38 lines
825 B
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2014 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
*/
#ifndef _ERRNO_H
#define _ERRNO_H
#include <linux/errno.h>
#ifdef __SANDBOX__
#define __errno_asm_label asm("__u_boot_errno")
#else
#define __errno_asm_label
#endif
extern int errno __errno_asm_label;
#define __set_errno(val) do { errno = val; } while (0)
/**
* errno_str() - get description for error number
*
* @errno: error number (negative in case of error)
* Return: string describing the error. If CONFIG_ERRNO_STR is not
* defined an empty string is returned.
*/
#ifdef CONFIG_ERRNO_STR
const char *errno_str(int errno);
#else
static const char error_message[] = "";
static inline const char *errno_str(int errno)
{
return error_message;
}
#endif
#endif /* _ERRNO_H */