74d44e7b2a
With relocatable binaries the linker is not able to supply absolute addresses. These only get available when the relocation function is being run. Since for early initialization we need some variables before relocation, we supply them relatively to some known address in the binary. This means that the variables have to be converted to absolute addresses during runtime. This patch adds a C macro and an assembly macro to calculate the variables during runtime. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
35 lines
597 B
C
35 lines
597 B
C
#ifndef __ASM_SECTIONS_H
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#define __ASM_SECTIONS_H
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#ifndef __ASSEMBLY__
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#include <asm-generic/sections.h>
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/*
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* Access a linker supplied variable. Use this if your code might not be running
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* at the address it is linked at.
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*/
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#define ld_var(name) ({ \
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unsigned long __ld_var_##name(void); \
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__ld_var_##name(); \
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})
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#else
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/*
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* Access a linker supplied variable, assembler macro version
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*/
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.macro ld_var name, reg, scratch
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1000:
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ldr \reg, 1001f
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ldr \scratch, =1000b
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add \reg, \reg, \scratch
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b 1002f
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1001:
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.word \name - 1000b
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1002:
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.endm
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#endif
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#endif /* __ASM_SECTIONS_H */
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