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https://github.com/brain-hackers/u-boot-brain
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0ae7653128
Relocation code based on a patch by Scott Wood, which is: Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: David Feng <fenghua@phytium.com.cn>
59 lines
1.4 KiB
ArmAsm
59 lines
1.4 KiB
ArmAsm
/*
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* relocate - common relocation function for AArch64 U-Boot
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*
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* (C) Copyright 2013
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* Albert ARIBAUD <albert.u.boot@aribaud.net>
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* David Feng <fenghua@phytium.com.cn>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <asm-offsets.h>
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#include <config.h>
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#include <linux/linkage.h>
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/*
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* void relocate_code (addr_moni)
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*
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* This function relocates the monitor code.
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* x0 holds the destination address.
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*/
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ENTRY(relocate_code)
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/*
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* Copy u-boot from flash to RAM
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*/
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ldr x1, =__image_copy_start /* x1 <- SRC &__image_copy_start */
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subs x9, x0, x1 /* x9 <- relocation offset */
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b.eq relocate_done /* skip relocation */
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ldr x2, =__image_copy_end /* x2 <- SRC &__image_copy_end */
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copy_loop:
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ldp x10, x11, [x1], #16 /* copy from source address [x1] */
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stp x10, x11, [x0], #16 /* copy to target address [x0] */
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cmp x1, x2 /* until source end address [x2] */
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b.lo copy_loop
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/*
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* Fix .rela.dyn relocations
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*/
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ldr x2, =__rel_dyn_start /* x2 <- SRC &__rel_dyn_start */
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ldr x3, =__rel_dyn_end /* x3 <- SRC &__rel_dyn_end */
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fixloop:
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ldp x0, x1, [x2], #16 /* (x0,x1) <- (SRC location, fixup) */
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ldr x4, [x2], #8 /* x4 <- addend */
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and x1, x1, #0xffffffff
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cmp x1, #1027 /* relative fixup? */
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bne fixnext
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/* relative fix: store addend plus offset at dest location */
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add x0, x0, x9
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add x4, x4, x9
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str x4, [x0]
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fixnext:
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cmp x2, x3
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b.lo fixloop
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relocate_done:
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ret
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ENDPROC(relocate_code)
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