f69a99dbf8
Garbage collected sections allow for trimming the size of the binaries as well as allowing for not needing to config off unused functions. To that end, on a rambi build the following differences are observed: $ diff -up \ <(readelf -l coreboot-builds/google_rambi/cbfs/fallback/ramstage.elf) \ <(readelf -l coreboot-builds/google_rambi_gc_sections/cbfs/fallback/ramstage.elf) --- /dev/fd/63 2015-03-10 12:07:27.927985430 -0500 +++ /dev/fd/62 2015-03-10 12:07:27.927985430 -0500 @@ -6,9 +6,9 @@ There are 4 program headers, starting at Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align LOAD 0x001000 0x00000000 0x00000000 0x00040 0x00040 RWE 0 - LOAD 0x001040 0x00000040 0x00000040 0x34560 0x34560 RWE 0 - LOAD 0x0355a0 0x000345a0 0x000345a0 0x02578 0x02578 RWE 0 - LOAD 0x037b18 0x00036b18 0x00036b18 0x00000 0x0b560 0 + LOAD 0x001040 0x00000040 0x00000040 0x2cbf8 0x2cbf8 RWE 0 + LOAD 0x02dc38 0x0002cc38 0x0002cc38 0x02208 0x02208 RWE 0 + LOAD 0x02fe40 0x0002ee40 0x0002ee40 0x00000 0x0a888 0 Section to Segment mapping: Segment Sections... $ diff -up \ <(readelf -l coreboot-builds/google_rambi/cbfs/fallback/romstage.elf) \ <(readelf -l coreboot-builds/google_rambi_gc_sections/cbfs/fallback/romstage.elf) --- /dev/fd/63 2015-03-10 12:08:16.855985880 -0500 +++ /dev/fd/62 2015-03-10 12:08:16.851985880 -0500 @@ -5,8 +5,8 @@ There are 1 program headers, starting at Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align - LOAD 0x000060 0xfff20000 0xfff20000 0x08b81 0x08b81 R E 0x10 + LOAD 0x000060 0xfff20000 0xfff20000 0x06300 0x06300 R E 0x10 Section to Segment mapping: Segment Sections... - 00 .rom .text + 00 .rom The following warnings needed to be applied to CFLAGS_common because for some reason gcc was miraculously emitting the warnings with the unrelated *-sections options: -Wno-unused-but-set-variable Change-Id: I210784fdfc273ce4cb9927352cbd5a51be3c6929 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/8635 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> |
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| .. | ||
| arch | ||
| console | ||
| cpu | ||
| device | ||
| drivers | ||
| ec | ||
| include | ||
| lib | ||
| mainboard | ||
| northbridge | ||
| soc | ||
| southbridge | ||
| superio | ||
| vendorcode | ||
| Kconfig | ||