mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-28 21:09:00 +09:00
![David Feng](/assets/img/avatar_default.png)
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
/*
|
|
* relocate - common relocation function for AArch64 U-Boot
|
|
*
|
|
* (C) Copyright 2013
|
|
* Albert ARIBAUD <albert.u.boot@aribaud.net>
|
|
* David Feng <fenghua@phytium.com.cn>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <asm-offsets.h>
|
|
#include <config.h>
|
|
#include <linux/linkage.h>
|
|
|
|
/*
|
|
* void relocate_code (addr_moni)
|
|
*
|
|
* This function relocates the monitor code.
|
|
* x0 holds the destination address.
|
|
*/
|
|
ENTRY(relocate_code)
|
|
/*
|
|
* Copy u-boot from flash to RAM
|
|
*/
|
|
ldr x1, =__image_copy_start /* x1 <- SRC &__image_copy_start */
|
|
subs x9, x0, x1 /* x9 <- relocation offset */
|
|
b.eq relocate_done /* skip relocation */
|
|
ldr x2, =__image_copy_end /* x2 <- SRC &__image_copy_end */
|
|
|
|
copy_loop:
|
|
ldp x10, x11, [x1], #16 /* copy from source address [x1] */
|
|
stp x10, x11, [x0], #16 /* copy to target address [x0] */
|
|
cmp x1, x2 /* until source end address [x2] */
|
|
b.lo copy_loop
|
|
|
|
/*
|
|
* Fix .rela.dyn relocations
|
|
*/
|
|
ldr x2, =__rel_dyn_start /* x2 <- SRC &__rel_dyn_start */
|
|
ldr x3, =__rel_dyn_end /* x3 <- SRC &__rel_dyn_end */
|
|
fixloop:
|
|
ldp x0, x1, [x2], #16 /* (x0,x1) <- (SRC location, fixup) */
|
|
ldr x4, [x2], #8 /* x4 <- addend */
|
|
and x1, x1, #0xffffffff
|
|
cmp x1, #1027 /* relative fixup? */
|
|
bne fixnext
|
|
|
|
/* relative fix: store addend plus offset at dest location */
|
|
add x0, x0, x9
|
|
add x4, x4, x9
|
|
str x4, [x0]
|
|
fixnext:
|
|
cmp x2, x3
|
|
b.lo fixloop
|
|
|
|
relocate_done:
|
|
ret
|
|
ENDPROC(relocate_code)
|