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platform_build
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Disable relocation_packer and migrate to SHT_RELR sections. 

Proposal for adding SHT_RELR sections in the generic-abi is at
https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg

Comparison with relocation_packer for aosp_marlin-userdebug:
$ du -B1 -s */out/target/product/marlin/system
 996958208      base/out/target/product/marlin/system
1008340992      no_pack/out/target/product/marlin/system
 997801984      sht_relr/out/target/product/marlin/system

base contains a build with current settings.
no_pack contains a build with relocation_packer disabled.
sht_relr contains a build with SHT_RELR sections enabled.

relocation_packer was saving 11,382,784 bytes (no_pack - base).
SHT_RELR sections are saving 10,539,008 bytes (no_pack - sht_relr).

Bug: None
Test: Built aosp_marlin-userdebug image, boots on device.
Test: Built aosp_x86_64-userdebug image, boots in emulator.
Change-Id: Ic753abecb77863c64996157c543c344e66f0f4dd
This commit is contained in:
Rahul Chaudhry 2018-03-21 11:31:09 -07:00
parent d39eeb44f1
commit dbf3bfffc6
1 changed files with 8 additions and 0 deletions
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8
core/dynamic_binary.mk
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@ -67,6 +67,14 @@ ifneq ($(HOST_OS),linux)
my_pack_module_relocations := false
endif
# Disable relocation_packer and migrate to SHT_RELR sections.
#
# Proposal for adding SHT_RELR sections in generic-abi is at
# https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg
#
# TODO: Remove relocation_packer and associated build logic.
my_pack_module_relocations := false
ifeq (true,$(my_pack_module_relocations))
# Pack relocations
$(relocation_packer_output): $(relocation_packer_input)