[PATCH v3 01/11] Makefile: add SPL_REMAKE_ELF_LDSCRIPT feature

[Tom Rini]

On Tue, Apr 21, 2026 at 09:43:44PM +0200, michael.srba at seznam.cz wrote:

> From: Michael Srba <Michael.Srba at seznam.cz>
> 
> Some platforms (e.g. least Qualcomm), use the ELF format in creative
> ways, including in the bootrom. Make SPL_REMAKE_ELF use a linker script
> specified in SPL_REMAKE_ELF_LDSCRIPT (with the previously hardcoded path
> as the default).
> 
> Signed-off-by: Michael Srba <Michael.Srba at seznam.cz>
> ---
>  Makefile           | 10 ++++++++--
>  common/spl/Kconfig | 10 ++++++++++
>  2 files changed, 18 insertions(+), 2 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 8af18668b0f..50893d5689e 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -2004,16 +2004,22 @@ u-boot.elf: u-boot.bin u-boot-elf.lds FORCE
>  quiet_cmd_u-boot-spl-elf ?= LD      $@
>  	cmd_u-boot-spl-elf ?= $(LD) spl/u-boot-spl-elf.o -o $@ \
>  	$(if $(CONFIG_SYS_BIG_ENDIAN),-EB,-EL) \
> -	-T u-boot-elf.lds --defsym=$(CONFIG_PLATFORM_ELFENTRY)=$(CONFIG_SPL_TEXT_BASE) \
> +	-T spl/u-boot-spl-elf.lds --defsym=$(CONFIG_PLATFORM_ELFENTRY)=$(CONFIG_SPL_TEXT_BASE) \
>  	-Ttext=$(CONFIG_SPL_TEXT_BASE)
> -spl/u-boot-spl.elf: spl/u-boot-spl.bin u-boot-elf.lds
> +spl/u-boot-spl.elf: spl/u-boot-spl.bin spl/u-boot-spl-elf.lds
>  	$(Q)$(OBJCOPY) -I binary $(PLATFORM_ELFFLAGS) $< spl/u-boot-spl-elf.o
>  	$(call if_changed,u-boot-spl-elf)
>  
> +SPL_REMAKE_ELF_LDSCRIPT := $(addprefix $(srctree)/,$(CONFIG_SPL_REMAKE_ELF_LDSCRIPT:"%"=%))
> +
> +spl/u-boot-spl-elf.lds: $(SPL_REMAKE_ELF_LDSCRIPT) FORCE
> +	$(call if_changed_dep,cpp_lds)
> +
>  u-boot-elf.lds: arch/u-boot-elf.lds prepare FORCE
>  	$(call if_changed_dep,cpp_lds)
>  
>  PHONY += prepare0
> +
>  # MediaTek's ARM-based u-boot needs a header to contains its load address
>  # which is parsed by the BootROM.
>  # If the SPL build is enabled, the header will be added to the spl binary,
> diff --git a/common/spl/Kconfig b/common/spl/Kconfig
> index d1a85f50209..1d279a2bb05 100644
> --- a/common/spl/Kconfig
> +++ b/common/spl/Kconfig
> @@ -247,6 +247,16 @@ config SPL_HANDOFF
>  	  proper. Also SPL can receive information from TPL in the same place
>  	  if that is enabled.
>  
> +config SPL_REMAKE_ELF_LDSCRIPT
> +	string "Linker script for SPL ELF"
> +	depends on SPL_REMAKE_ELF
> +	default "arch/$(ARCH)/u-boot-spl-elf.lds"
> +	help
> +	  This allows specifying a linker script that will act on u-boot-spl.bin.
> +	  Some platforms (e.g Qualcomm) use the ELF format in creative ways,
> +	  including in the bootrom. For such platforms, you can change the default
> +	  linker script to a platform-specific one.
> +
>  config SPL_LDSCRIPT
>  	string "Linker script for the SPL stage"
>  	default "arch/arm/cpu/arm926ejs/sunxi/u-boot-spl.lds" if MACH_SUNIV

Did what I said about cleaning up the remake elf Makefile logic itself
get lost somewhere? Sorry. To repeat, we should have a remake elf
function, make use of $(PHASE_) and have Kconfig entries for both
REMAKE_ELF_LDSCRIPT and SPL_REMAKE_ELF_SCRIPT (so we can use $(PHASE_)
again to get the right one. Thanks!

-- 
Tom
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