variable __rel_dyn_start and __rel_dyn_end missing for u-boot proper?

[Chan Kim]

Hello experts,

 

I can't find the definition of variable __rel_dyn_start and __rel_dyn_end
for u-boot proper build.

Those variables are used in arch/arm/cpu/armv8/start.S  

(though they are enclosed in #ifdef CONFIG_POSISION_INDEPDNED and #endif)

 

pie_fixup:

    adr x0, _start      /* x0 <- Runtime value of _start */

    ldr x1, _TEXT_BASE      /* x1 <- Linked value of _start */

    subs    x9, x0, x1      /* x9 <- Run-vs-link offset */

    beq pie_fixup_done

    adrp    x2, __rel_dyn_start     /* x2 <- Runtime &__rel_dyn_start */

    add     x2, x2, #:lo12:__rel_dyn_start

    adrp    x3, __rel_dyn_end       /* x3 <- Runtime &__rel_dyn_end */

    add     x3, x3, #:lo12:__rel_dyn_end

pie_fix_loop:

 

Shouldn't they be added in arch/arm/cpu/armv8/u-boot.lds like in
arch/arm/cpu/u-boot-spl.lds?

These are only places __rel_dyn_star/end are defined for arm. (v2021.10)

ckim at ckim-ubuntu:~/U-BOOT/u-boot$ grep '__rel_dyn_\(start\|end\).*=.*\.'
arch/arm -r

arch/arm/cpu/u-boot-spl.lds:              __rel_dyn_start = .;

arch/arm/cpu/u-boot-spl.lds:              __rel_dyn_end = .;

arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds:                __rel_dyn_start =
.;

arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds:                __rel_dyn_end = .;

 

By the way, I asked a question about the relocation code on stack exchange.

I would be very happy if anyone here could spare some time to answer my
question.

https://stackoverflow.com/questions/70092014/cant-exactly-understand-the-ass
embly-code-about-how-relocation-works-in-u-boot/70094227#70094227

 

Thank you!

Chan Kim