[PATCH v4 01/11] Makefile: add SPL_REMAKE_ELF_LDSCRIPT feature

[michael.srba at seznam.cz]

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

-- 
2.53.0