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| author | Graeme Russ <graeme.russ@gmail.com> | 2010-10-07 20:03:20 +1100 |
|---|---|---|
| committer | Graeme Russ <graeme.russ@gmail.com> | 2010-10-07 20:03:20 +1100 |
| commit | d664adb6bb7243fc9be1cb242a18a76901bc5c3a (patch) | |
| tree | b29c069950bd4c4af917015c29ba3ae824a4818e | |
| parent | abe98f49e191ce0183132bed548643db7e2b80c5 (diff) | |
| download | u-boot-d664adb6bb7243fc9be1cb242a18a76901bc5c3a.zip u-boot-d664adb6bb7243fc9be1cb242a18a76901bc5c3a.tar.gz u-boot-d664adb6bb7243fc9be1cb242a18a76901bc5c3a.tar.bz2 | |
x86: use gc sections to reduce image size
Follow the discussion of Charles Manning and Mike Frysinger.
Using gc_sections helps reduce image size.
| -rw-r--r-- | arch/i386/config.mk | 3 | ||||
| -rw-r--r-- | board/eNET/u-boot.lds | 10 |
2 files changed, 8 insertions, 5 deletions
diff --git a/arch/i386/config.mk b/arch/i386/config.mk index 4b990e0..0e80a1a 100644 --- a/arch/i386/config.mk +++ b/arch/i386/config.mk @@ -26,3 +26,6 @@ CROSS_COMPILE ?= i386-linux- STANDALONE_LOAD_ADDR = 0x40000 PLATFORM_CPPFLAGS += -DCONFIG_I386 -D__I386__ + +LDFLAGS += --cref --gc-sections +PLATFORM_RELFLAGS += -ffunction-sections diff --git a/board/eNET/u-boot.lds b/board/eNET/u-boot.lds index d78d75f..7b211a8 100644 --- a/board/eNET/u-boot.lds +++ b/board/eNET/u-boot.lds @@ -77,13 +77,13 @@ SECTIONS _i386boot_bss_size = SIZEOF(.bss); /* 16bit realmode trampoline code */ - .realmode 0x7c0 : AT ( LOADADDR(.rel.dyn) + SIZEOF(.rel.dyn) ) { *(.realmode) } + .realmode 0x7c0 : AT ( LOADADDR(.rel.dyn) + SIZEOF(.rel.dyn) ) { KEEP(*(.realmode)) } _i386boot_realmode = LOADADDR(.realmode); _i386boot_realmode_size = SIZEOF(.realmode); /* 16bit BIOS emulation code (just enough to boot Linux) */ - .bios 0 : AT ( LOADADDR(.realmode) + SIZEOF(.realmode) ) { *(.bios) } + .bios 0 : AT ( LOADADDR(.realmode) + SIZEOF(.realmode) ) { KEEP(*(.bios)) } _i386boot_bios = LOADADDR(.bios); _i386boot_bios_size = SIZEOF(.bios); @@ -98,12 +98,12 @@ SECTIONS * The fff0 offset of resetvec is important, however. */ . = 0xfffffe00; - .start32 : AT (TEXT_BASE + 0x3fe00) { *(.start32); } + .start32 : AT (TEXT_BASE + 0x3fe00) { KEEP(*(.start32)); } . = 0xf800; - .start16 : AT (TEXT_BASE + 0x3f800) { *(.start16); } + .start16 : AT (TEXT_BASE + 0x3f800) { KEEP(*(.start16)); } . = 0xfff0; - .resetvec : AT (TEXT_BASE + 0x3fff0) { *(.resetvec); } + .resetvec : AT (TEXT_BASE + 0x3fff0) { KEEP(*(.resetvec)); } _i386boot_end = (LOADADDR(.resetvec) + SIZEOF(.resetvec) ); } |