Provide a default linker script for SPL binaries. Start address and size of text section and BSS section are configurable. All sections are arranged in a way that only relevant sections are kept in the code section for maximum size reduction. All other sections are kept but moved outside the code section to help with debugging.
Signed-off-by: Daniel Schwierzeck daniel.schwierzeck@gmail.com
---
Changes in v2: - add missing section .u_boot_list
arch/mips/config.mk | 5 ++- arch/mips/cpu/u-boot-spl.lds | 90 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 93 insertions(+), 2 deletions(-) create mode 100644 arch/mips/cpu/u-boot-spl.lds
diff --git a/arch/mips/config.mk b/arch/mips/config.mk index 609a998..dcd3460 100644 --- a/arch/mips/config.mk +++ b/arch/mips/config.mk @@ -65,7 +65,7 @@ else PF_ABICALLS := -mabicalls PF_PIC := -fpic PF_PIE := -pie -PF_OBJCOPY := -j .got -j .u_boot_list -j .rel.dyn -j .padding +PF_OBJCOPY := -j .got -j .rel.dyn -j .padding PF_OBJCOPY += -j .dtb.init.rodata endif
@@ -74,4 +74,5 @@ PLATFORM_CPPFLAGS += -msoft-float PLATFORM_LDFLAGS += -G 0 -static -n -nostdlib PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections LDFLAGS_FINAL += --gc-sections $(PF_PIE) -OBJCOPYFLAGS += -j .text -j .rodata -j .data $(PF_OBJCOPY) +OBJCOPYFLAGS += -j .text -j .rodata -j .data -j .u_boot_list +OBJCOPYFLAGS += $(PF_OBJCOPY) diff --git a/arch/mips/cpu/u-boot-spl.lds b/arch/mips/cpu/u-boot-spl.lds new file mode 100644 index 0000000..07004ea --- /dev/null +++ b/arch/mips/cpu/u-boot-spl.lds @@ -0,0 +1,90 @@ +/* + * SPDX-License-Identifier: GPL-2.0+ + */ + +MEMORY { .spl_mem : ORIGIN = CONFIG_SPL_TEXT_BASE, \ + LENGTH = CONFIG_SPL_MAX_SIZE } +MEMORY { .bss_mem : ORIGIN = CONFIG_SPL_BSS_START_ADDR, \ + LENGTH = CONFIG_SPL_BSS_MAX_SIZE } + +OUTPUT_ARCH(mips) +ENTRY(_start) +SECTIONS +{ + . = 0x00000000; + + . = ALIGN(4); + .text : { + *(.text*) + } > .spl_mem + + . = ALIGN(4); + .rodata : { + *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) + } > .spl_mem + + . = ALIGN(4); + .data : { + *(SORT_BY_ALIGNMENT(.data*)) + *(SORT_BY_ALIGNMENT(.sdata*)) + } > .spl_mem + +#ifdef CONFIG_SPL_DM + . = ALIGN(4); + .u_boot_list : { + KEEP(*(SORT(.u_boot_list*))); + } > .spl_mem +#endif + + . = ALIGN(4); + __image_copy_end = .; + + .bss (NOLOAD) : { + __bss_start = .; + *(.bss*) + *(.sbss*) + *(COMMON) + . = ALIGN(4); + __bss_end = .; + } > .bss_mem + + .rel.dyn (NOLOAD) : { + *(.rel.dyn) + } + + .dynsym : { + *(.dynsym) + } + + .dynbss : { + *(.dynbss) + } + + .dynstr : { + *(.dynstr) + } + + .dynamic : { + *(.dynamic) + } + + .plt : { + *(.plt) + } + + .interp : { + *(.interp) + } + + .gnu : { + *(.gnu*) + } + + .MIPS.stubs : { + *(.MIPS.stubs) + } + + .hash : { + *(.hash) + } +}