diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2015-03-10 11:45:25 -0500 |
|---|---|---|
| committer | Aaron Durbin <adurbin@google.com> | 2015-03-17 14:35:31 +0100 |
| commit | f69a99dbf843da7f4c2b4965004140d2ea83cd67 (patch) | |
| tree | 3feb86513ce9febee65f694fcf91bbbcefdec513 /src/lib/rmodule.ld | |
| parent | 51794199899521dc3c363fedc8437d8f25b8b7df (diff) | |
coreboot: x86: enable gc-sections
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>
Diffstat (limited to 'src/lib/rmodule.ld')
| -rw-r--r-- | src/lib/rmodule.ld | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/lib/rmodule.ld b/src/lib/rmodule.ld index f3e7cba212..c1669becb6 100644 --- a/src/lib/rmodule.ld +++ b/src/lib/rmodule.ld @@ -14,6 +14,8 @@ BASE_ADDRESS = 0x00000; +ENTRY(__rmodule_entry); + SECTIONS { . = BASE_ADDRESS; @@ -38,15 +40,15 @@ SECTIONS * ramstage.ld should be made here as well. */ . = ALIGN(8); pci_drivers = . ; - *(.rodata.pci_driver) + KEEP(*(.rodata.pci_driver)); epci_drivers = . ; . = ALIGN(8); cpu_drivers = . ; - *(.rodata.cpu_driver) + KEEP(*(.rodata.cpu_driver)); ecpu_drivers = . ; . = ALIGN(8); _bs_init_begin = .; - *(.bs_init) + KEEP(*(.bs_init)); _bs_init_end = .; . = ALIGN(8); @@ -59,7 +61,7 @@ SECTIONS * to a module, however there has to be an prior agreement * on how to interpret the parameters. */ _module_params_begin = .; - *(.module_parameters); + KEEP(*(.module_parameters)); _module_params_end = .; . = ALIGN(8); |