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treewide: rework linker symbol declarations in sections header

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1. Convert all linker symbols to char[] type so that we can get the
   corresponding address by calling array name 'var' or its address
   '&var'. In this way, we can avoid some potential issues[1].
2. Remove unused symbol '_TEXT_BASE'. It has been abandoned and has
   not been referenced by any source code.
3. Move '__data_end' to the arch x86's own sections header as it's
   only used by x86 arch.
4. Remove some duplicate declared linker symbols. Now we use the
   standard header file to declare them.

[1] This patch fixes the boot failure on MIPS target. Error log:
SPL: Image overlaps SPL

Fixes: 1b8a1be1a1 ("spl: spl_legacy: Fix spl_end address")
Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Shiji Yang
2023-08-03 09:47:16 +08:00
committed by Tom Rini
parent a077ac13d0
commit 506df9dc58
58 changed files with 64 additions and 45 deletions
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34
include/asm-generic/sections.h
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@@ -61,8 +61,12 @@ static inline int arch_is_kernel_data(unsigned long addr)
/* Start of U-Boot text region */
extern char __text_start[];
/* This marks the end of the text region which must be relocated */
extern char __image_copy_end[];
/* This marks the text region which must be relocated */
extern char __image_copy_start[], __image_copy_end[];
extern char __bss_end[];
extern char __rel_dyn_start[], __rel_dyn_end[];
extern char _image_binary_end[];
/*
* This is the U-Boot entry point - prior to relocation it should be same
@@ -70,30 +74,4 @@ extern char __image_copy_end[];
*/
extern void _start(void);
/*
* ARM defines its symbols as char[]. Other arches define them as ulongs.
*/
#ifdef CONFIG_ARM
extern char __bss_start[];
extern char __bss_end[];
extern char __image_copy_start[];
extern char __image_copy_end[];
extern char _image_binary_end[];
extern char __rel_dyn_start[];
extern char __rel_dyn_end[];
#else /* don't use offsets: */
/* Exports from the Linker Script */
extern ulong __data_end;
extern ulong __rel_dyn_start;
extern ulong __rel_dyn_end;
extern ulong __bss_end;
extern ulong _image_binary_end;
extern ulong _TEXT_BASE; /* code start */
#endif
#endif /* _ASM_GENERIC_SECTIONS_H_ */