diff options
| author | Peter Tyser <ptyser@xes-inc.com> | 2010-09-29 14:05:56 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2010-10-20 02:38:41 -0500 |
| commit | fbe53f59bd40b3b1ab66dc98859e26589d64d1b7 (patch) | |
| tree | 5d9d508e595b7a80848ef304deb4f7b6f3d3ff58 | |
| parent | 68337fb5f6f811cd4485ec14c469551f874d535b (diff) | |
| download | talos-obmc-uboot-fbe53f59bd40b3b1ab66dc98859e26589d64d1b7.tar.gz talos-obmc-uboot-fbe53f59bd40b3b1ab66dc98859e26589d64d1b7.zip | |
85xx: Use gc-sections to reduce image size
On an XPedite5370 over 11KBytes were saved:
Before:
text data bss dec hex filename
332456 33364 33476 399296 617c0 ./u-boot
After:
text data bss dec hex filename
321075 33836 33476 388387 5ed23 ./u-boot
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/config.mk | 4 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc85xx/u-boot.lds | 52 |
2 files changed, 14 insertions, 42 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/config.mk b/arch/powerpc/cpu/mpc85xx/config.mk index f07d9209a7..ce4376b100 100644 --- a/arch/powerpc/cpu/mpc85xx/config.mk +++ b/arch/powerpc/cpu/mpc85xx/config.mk @@ -25,6 +25,10 @@ PLATFORM_RELFLAGS += -fPIC -meabi PLATFORM_CPPFLAGS += -ffixed-r2 -Wa,-me500 -msoft-float -mno-string +# Enable gc-sections to enable generation of smaller images. +PLATFORM_LDFLAGS += --gc-sections +PLATFORM_RELFLAGS += -ffunction-sections -fdata-sections + # -mspe=yes is needed to have -mno-spe accepted by a buggy GCC; # see "[PATCH,rs6000] make -mno-spe work as expected" on # http://gcc.gnu.org/ml/gcc-patches/2008-04/msg00311.html diff --git a/arch/powerpc/cpu/mpc85xx/u-boot.lds b/arch/powerpc/cpu/mpc85xx/u-boot.lds index c88b1f35b9..85042c5254 100644 --- a/arch/powerpc/cpu/mpc85xx/u-boot.lds +++ b/arch/powerpc/cpu/mpc85xx/u-boot.lds @@ -25,8 +25,7 @@ #endif OUTPUT_ARCH(powerpc) -/* Do we need any of these for elf? - __DYNAMIC = 0; */ + PHDRS { text PT_LOAD; @@ -38,42 +37,16 @@ SECTIONS /* Read-only sections, merged into text segment: */ . = + SIZEOF_HEADERS; .interp : { *(.interp) } - .hash : { *(.hash) } - .dynsym : { *(.dynsym) } - .dynstr : { *(.dynstr) } - .rel.text : { *(.rel.text) } - .rela.text : { *(.rela.text) } - .rel.data : { *(.rel.data) } - .rela.data : { *(.rela.data) } - .rel.rodata : { *(.rel.rodata) } - .rela.rodata : { *(.rela.rodata) } - .rel.got : { *(.rel.got) } - .rela.got : { *(.rela.got) } - .rel.ctors : { *(.rel.ctors) } - .rela.ctors : { *(.rela.ctors) } - .rel.dtors : { *(.rel.dtors) } - .rela.dtors : { *(.rela.dtors) } - .rel.bss : { *(.rel.bss) } - .rela.bss : { *(.rela.bss) } - .rel.plt : { *(.rel.plt) } - .rela.plt : { *(.rela.plt) } - .init : { *(.init) } - .plt : { *(.plt) } .text : { - *(.text) - *(.got1) + *(.text*) } :text _etext = .; PROVIDE (etext = .); .rodata : { - *(.eh_frame) *(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*))) } :text - .fini : { *(.fini) } =0 - .ctors : { *(.ctors) } - .dtors : { *(.dtors) } /* Read-write section, merged into data segment: */ . = (. + 0x00FF) & 0xFFFFFF00; @@ -81,23 +54,19 @@ SECTIONS PROVIDE (erotext = .); .reloc : { - *(.got) + KEEP(*(.got)) _GOT2_TABLE_ = .; - *(.got2) + KEEP(*(.got2)) _FIXUP_TABLE_ = .; - *(.fixup) + KEEP(*(.fixup)) } __got2_entries = (_FIXUP_TABLE_ - _GOT2_TABLE_) >> 2; __fixup_entries = (. - _FIXUP_TABLE_) >> 2; .data : { - *(.data) - *(.data1) - *(.sdata) - *(.sdata2) - *(.dynamic) - CONSTRUCTORS + *(.data*) + *(.sdata*) } _edata = .; PROVIDE (edata = .); @@ -126,7 +95,7 @@ SECTIONS .resetvec RESET_VECTOR_ADDRESS : { - *(.resetvec) + KEEP(*(.resetvec)) } :text = 0xffff . = RESET_VECTOR_ADDRESS + 0x4; @@ -145,9 +114,8 @@ SECTIONS __bss_start = .; .bss (NOLOAD) : { - *(.sbss) *(.scommon) - *(.dynbss) - *(.bss) + *(.sbss*) + *(.bss*) *(COMMON) } :bss |
