mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 18:56:15 +09:00
23ac79ff80
Commit7653942b10("common/env_embedded.c: drop support for CONFIG_SYS_USE_PPCENV") dropped the .ppcenv section which was used in linking scripts to allow fine placement of embedded environment sections. This implies that GCC randomly places objects from env/embedded.o and environment is not guaranteed to be located at the correct address: 04003df8 g F .text 00000038 mii_init 04004000 g O .text 00000004 env_size 04004004 g O .text 00002000 environment 04006004 g F .text 00000040 .hidden __lshrdi3 This patch restores this capability by allocating each object marked with __UBOOT_ENV_SECTION__ into a different section. Hence 'environment' will be alone in .text.environment, allowing a fine placement in u-boot.lds with: . = DEFINED(env_offset) ? env_offset : .; env/embedded.o (.text.environment) Fixes:7653942b10("common/env_embedded.c: drop support for CONFIG_SYS_USE_PPCENV") Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
/*
|
|
* (C) Copyright 2001
|
|
* Erik Theisen, Wave 7 Optics, etheisen@mindspring.com.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <linux/kconfig.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#define __ASSEMBLY__ /* Dirty trick to get only #defines */
|
|
#endif
|
|
#define __ASM_STUB_PROCESSOR_H__ /* don't include asm/processor. */
|
|
#include <config.h>
|
|
#undef __ASSEMBLY__
|
|
#include <environment.h>
|
|
#include <linux/stringify.h>
|
|
|
|
/* Handle HOSTS that have prepended crap on symbol names, not TARGETS. */
|
|
#if defined(__APPLE__)
|
|
/* Leading underscore on symbols */
|
|
# define SYM_CHAR "_"
|
|
#else /* No leading character on symbols */
|
|
# define SYM_CHAR
|
|
#endif
|
|
|
|
/*
|
|
* Generate embedded environment table
|
|
* inside U-Boot image, if needed.
|
|
*/
|
|
#if defined(ENV_IS_EMBEDDED) || defined(CONFIG_BUILD_ENVCRC)
|
|
/*
|
|
* Put the environment in the .text section when we are building
|
|
* U-Boot proper. The host based program "tools/envcrc" does not need
|
|
* a seperate section.
|
|
*/
|
|
#if defined(USE_HOSTCC) /* Native for 'tools/envcrc' */
|
|
# define __UBOOT_ENV_SECTION__(name) /*XXX DO_NOT_DEL_THIS_COMMENT*/
|
|
|
|
#else /* Environment is embedded in U-Boot's .text section */
|
|
/* XXX - This only works with GNU C */
|
|
# define __UBOOT_ENV_SECTION__(name) __attribute__ ((section(".text."#name)))
|
|
#endif
|
|
|
|
/*
|
|
* Macros to generate global absolutes.
|
|
*/
|
|
#if defined(__bfin__)
|
|
# define GEN_SET_VALUE(name, value) \
|
|
asm(".set " GEN_SYMNAME(name) ", " GEN_VALUE(value))
|
|
#else
|
|
# define GEN_SET_VALUE(name, value) \
|
|
asm(GEN_SYMNAME(name) " = " GEN_VALUE(value))
|
|
#endif
|
|
#define GEN_SYMNAME(str) SYM_CHAR #str
|
|
#define GEN_VALUE(str) #str
|
|
#define GEN_ABS(name, value) \
|
|
asm(".globl " GEN_SYMNAME(name)); \
|
|
GEN_SET_VALUE(name, value)
|
|
|
|
/*
|
|
* Check to see if we are building with a
|
|
* computed CRC. Otherwise define it as ~0.
|
|
*/
|
|
#if !defined(ENV_CRC)
|
|
# define ENV_CRC (~0)
|
|
#endif
|
|
|
|
#define DEFAULT_ENV_INSTANCE_EMBEDDED
|
|
#include <env_default.h>
|
|
|
|
#ifdef CONFIG_ENV_ADDR_REDUND
|
|
env_t redundand_environment __UBOOT_ENV_SECTION__(redundand_environment) = {
|
|
0, /* CRC Sum: invalid */
|
|
0, /* Flags: invalid */
|
|
{
|
|
"\0"
|
|
}
|
|
};
|
|
#endif /* CONFIG_ENV_ADDR_REDUND */
|
|
|
|
/*
|
|
* These will end up in the .text section
|
|
* if the environment strings are embedded
|
|
* in the image. When this is used for
|
|
* tools/envcrc, they are placed in the
|
|
* .data/.sdata section.
|
|
*
|
|
*/
|
|
unsigned long env_size __UBOOT_ENV_SECTION__(env_size) = sizeof(env_t);
|
|
|
|
/*
|
|
* Add in absolutes.
|
|
*/
|
|
GEN_ABS(env_offset, CONFIG_ENV_OFFSET);
|
|
|
|
#endif /* ENV_IS_EMBEDDED */
|