[U-Boot] [PATCH v2 0/6] Optimize ARM relocation

Albert ARIBAUD
2013-05-28T07:01:45Z

*** NOTE: this series applies over the 'Factorize
ARM relocate_code instances' series.

This series optimizes relocation by ensuring ARM
binaries only use one type of relocation record,
R_ARM_RELATIVE., then optimizing relocation code
accordingly.

1. A Makefile rule is added that checks that no
other relocation record types are generated except
R_ARM_RELATIVE; build fails if this is the case.

2. All references to dymsym are removed, as this
table is not used for R_ARM_RELATIVE relocations.

3. arch/arm/lib/bss.c is replaced by a more generic
arch/arm/lib/sections.c where all section symbols will
be defined.

4. __image_copy_start and __image_copy_end symbols
are moved from linker scripts to arch/arm/lib/sections.c

5. __rel_dyn_start and __rel_dyn_end are moved from
linker scripts into arch/arm/lib/sections.c

6. relocate_code is optimized based on the fact that
symbol references are now always valid even before
relcation, and that only R_ARM_RELATIVE relocations
will be met.

Changes in v2:
- use $< instead of $(obj)u-boot
- new in V2: remove all dynsym references
- various comment fixes

Albert ARIBAUD (6):
arm: ensure u-boot only uses relative relocations
remove all references to .dynsym
arm: generalize lib/bss.c into lib/sections.c
arm: make __image_copy_{start,end} compiler-generated
arm: make __rel_dyn_{start,end} compiler-generated
arm: optimize relocate_code routine

Makefile | 7 +++
arch/arm/config.mk | 5 ++
arch/arm/cpu/arm920t/ep93xx/u-boot.lds | 6 ++-
arch/arm/cpu/arm926ejs/mxs/u-boot-spl.lds | 5 --
arch/arm/cpu/arm926ejs/spear/u-boot-spl.lds | 5 --
arch/arm/cpu/ixp/u-boot.lds | 20 +++++---
arch/arm/cpu/u-boot-spl.lds | 6 +--
arch/arm/cpu/u-boot.lds | 21 +++++---
arch/arm/lib/Makefile | 2 +-
arch/arm/lib/relocate.S | 61 ++++++------------------
arch/arm/lib/{bss.c => sections.c} | 8 +++-
board/actux1/u-boot.lds | 20 +++++---
board/actux2/u-boot.lds | 20 +++++---
board/actux3/u-boot.lds | 20 +++++---
board/ait/cam_enc_4xx/u-boot-spl.lds | 5 --
board/davinci/da8xxevm/u-boot-spl-da850evm.lds | 5 --
board/davinci/da8xxevm/u-boot-spl-hawk.lds | 1 -
board/dvlhost/u-boot.lds | 20 +++++---
board/freescale/mx31ads/u-boot.lds | 20 +++++---
board/vpac270/u-boot-spl.lds | 6 +--
include/asm-generic/sections.h | 3 --
21 files changed, 139 insertions(+), 127 deletions(-)
rename arch/arm/lib/{bss.c => sections.c} (79%)

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1.7.10.4