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| author | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2018-11-01 04:02:21 +0300 |
|---|---|---|
| committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2018-11-03 00:39:07 +0300 |
| commit | 963014641117291c15df2425caf46c7b4b979f18 (patch) | |
| tree | 02698bdef9005f995c36d87353c3f172e082836c /arch | |
| parent | 99431c1c21685fe63d46b6eac995b78ce9adce0a (diff) | |
| download | u-boot-963014641117291c15df2425caf46c7b4b979f18.tar.xz | |
MIPS: make size of relocation table fixed but configurable
Currently the size of the relocation table will be shrunk
to the actual size needed. Although this gives a maximal
space saving, it messes up the _end symbol. This breaks
features like appended DTBs because the _end symbol doesn't
point to the real end of the U-Boot binary.
Remove the size shrinking and make the size of the relocation
table fixed but configurable. This follows the Linux approach
and the user can adjust the size to his needs.
Also rename the relocation table section from .rel to .data.reloc
to follow the Linux approach and to avoid ambiguities with the
.rel.* sections added by the linker.
Reported-by: Lars Povlsen <lars.povlsen@microsemi.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/Kconfig | 18 | ||||
| -rw-r--r-- | arch/mips/config.mk | 2 | ||||
| -rw-r--r-- | arch/mips/cpu/u-boot.lds | 20 |
3 files changed, 32 insertions, 8 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 071dea04ec..6d646ef999 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -248,6 +248,24 @@ config MIPS_CACHE_INDEX_BASE Normally this is CKSEG0. If the MIPS system needs to move this block to some SRAM or ScratchPad RAM, adapt this option accordingly. +config MIPS_RELOCATION_TABLE_SIZE + hex "Relocation table size" + range 0x100 0x10000 + default "0x8000" + ---help--- + A table of relocation data will be appended to the U-Boot binary + and parsed in relocate_code() to fix up all offsets in the relocated + U-Boot. + + This option allows the amount of space reserved for the table to be + adjusted in a range from 256 up to 64k. The default is 32k and should + be ok in most cases. Reduce this value to shrink the size of U-Boot + binary. + + The build will fail and a valid size suggested if this is too small. + + If unsure, leave at the default value. + endmenu menu "OS boot interface" diff --git a/arch/mips/config.mk b/arch/mips/config.mk index 8aa45fc45c..22223a0f3e 100644 --- a/arch/mips/config.mk +++ b/arch/mips/config.mk @@ -55,7 +55,7 @@ PLATFORM_ELFFLAGS += -B mips $(OBJCOPYFLAGS) # MODFLAGS += -mlong-calls # ifndef CONFIG_SPL_BUILD -OBJCOPYFLAGS += -j .got -j .rel -j .padding -j .dtb.init.rodata +OBJCOPYFLAGS += -j .data.reloc -j .dtb.init.rodata LDFLAGS_FINAL += --emit-relocs endif diff --git a/arch/mips/cpu/u-boot.lds b/arch/mips/cpu/u-boot.lds index f2c9f94f74..fd0f1b5d4f 100644 --- a/arch/mips/cpu/u-boot.lds +++ b/arch/mips/cpu/u-boot.lds @@ -41,16 +41,22 @@ SECTIONS __image_copy_end = .; __init_end = .; - /* - * .rel must come last so that the mips-relocs tool can shrink - * the section size & the PT_LOAD program header filesz. - */ - .rel : { + .data.reloc : { __rel_start = .; - BYTE(0x0) - . += (32 * 1024) - 1; + /* + * Space for relocation table + * This needs to be filled so that the + * mips-reloc tool can overwrite the content. + * An invalid value is left at the start of the + * section to abort relocation if the table + * has not been filled in. + */ + LONG(0xFFFFFFFF); + FILL(0); + . += CONFIG_MIPS_RELOCATION_TABLE_SIZE - 4; } + . = ALIGN(4); _end = .; .bss __rel_start (OVERLAY) : { |