[PATCH 2/2] riscv: Provide __image_copy_{start_end} symbols in linkerscript

[Yao Zi]

On Mon, Apr 07, 2025 at 01:10:32PM +0200, Jonas Karlman wrote:
> Hi,
> 
> On 2025-04-07 05:37, Yao Zi wrote:
> > Binman looks for __image_copy_start to determine the base address of an
> > entry if elf-base-sym isn't specified, which is missing in RISC-V port.
> > This causes binman skips RISC-V SPL entries without filling addresses
> > into its .binman_sym_table section.
> > 
> > This patch defines __image_copy_start in linkerscript of both SPL and
> > proper U-Boot to ensure binman_sym functions correctly with the default
> > binman.dtsi. The paired symbol, __image_copy_end, is introduced as well
> > for completeness.
> > 
> > Signed-off-by: Yao Zi <ziyao at disroot.org>
> > ---
> >  arch/riscv/cpu/u-boot-spl.lds | 2 ++
> >  arch/riscv/cpu/u-boot.lds     | 3 +++
> >  2 files changed, 5 insertions(+)
> > 
> > diff --git a/arch/riscv/cpu/u-boot-spl.lds b/arch/riscv/cpu/u-boot-spl.lds
> > index 907094620bd..18eb62c01c6 100644
> > --- a/arch/riscv/cpu/u-boot-spl.lds
> > +++ b/arch/riscv/cpu/u-boot-spl.lds
> > @@ -16,6 +16,7 @@ ENTRY(_start)
> >  SECTIONS
> >  {
> >  	. = ALIGN(4);
> > +	__image_copy_start = ADDR(.text);
> >  	.text : {
> >  		arch/riscv/cpu/start.o	(.text)
> >  		*(.text*)
> > @@ -46,6 +47,7 @@ SECTIONS
> >  
> >  	_end = .;
> >  	_image_binary_end = .;
> > +	_image_copy_end = .;
> 
> This looks like a typo, should probably be with two _ ?

Yes, thanks for catching this. I'll correct it and apply Simon's tag in
v2. Simon, is it okay for you?

Thanks,
Yao Zi

> Regards,
> Jonas
> 
> >  
> >  	.bss : {
> >  		__bss_start = .;
> > diff --git a/arch/riscv/cpu/u-boot.lds b/arch/riscv/cpu/u-boot.lds
> > index 2ffe6ba3c8f..b11ea8b56d2 100644
> > --- a/arch/riscv/cpu/u-boot.lds
> > +++ b/arch/riscv/cpu/u-boot.lds
> > @@ -10,6 +10,7 @@ ENTRY(_start)
> >  SECTIONS
> >  {
> >  	. = ALIGN(4);
> > +	__image_copy_start = ADDR(.text);
> >  	.text : {
> >  		arch/riscv/cpu/start.o	(.text)
> >  	}
> > @@ -57,6 +58,8 @@ SECTIONS
> >  		__efi_runtime_rel_stop = .;
> >  	}
> >  
> > +	__image_copy_end = .;
> > +
> >  	/DISCARD/ : { *(.rela.plt*) }
> >  	.rela.dyn : {
> >  		__rel_dyn_start = .;
>