From 9c2aa7e7070a3e7c4341c83c375b47e48108a8ff Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Wed, 4 Nov 2020 14:01:45 +0100 Subject: [PATCH] microblaze: Enable GCC garbage collector for full U-Boot GCC's garbage collector works for Microblaze for quite a long time but none has enabled it. The same change has be done for example by commit fac4790491f6 ("arc: Eliminate unused code and data with GCC's garbage collector"). Before: text data bss dec hex filename 588760 33592 39192 661544 a1828 u-boot After: text data bss dec hex filename 504504 32164 38608 575276 8c72c u-boot Which saves almost 15% of memory footprint. Also group symbols/functions to proper section. Reported-by: Tom Rini Signed-off-by: Michal Simek --- arch/microblaze/config.mk | 3 +++ arch/microblaze/cpu/u-boot.lds | 6 +++--- 2 files changed, 6 insertions(+), 3 deletions(-) diff --git a/arch/microblaze/config.mk b/arch/microblaze/config.mk index 96c39b1278..de5b97e719 100644 --- a/arch/microblaze/config.mk +++ b/arch/microblaze/config.mk @@ -9,6 +9,9 @@ CONFIG_STANDALONE_LOAD_ADDR ?= 0x80F00000 PLATFORM_CPPFLAGS += -ffixed-r31 -D__microblaze__ +PLATFORM_CPPFLAGS += -fdata-sections -ffunction-sections + +LDFLAGS_FINAL += --gc-sections ifeq ($(CONFIG_SPL_BUILD),) PLATFORM_CPPFLAGS += -fPIC diff --git a/arch/microblaze/cpu/u-boot.lds b/arch/microblaze/cpu/u-boot.lds index 9282643349..5dc09dbad2 100644 --- a/arch/microblaze/cpu/u-boot.lds +++ b/arch/microblaze/cpu/u-boot.lds @@ -14,7 +14,7 @@ SECTIONS { __text_start = .; arch/microblaze/cpu/start.o (.text) - *(.text) + *(.text*) __text_end = .; } @@ -28,7 +28,7 @@ SECTIONS .data ALIGN(0x4): { __data_start = .; - *(.data) + *(.data*) __data_end = .; } @@ -51,7 +51,7 @@ SECTIONS __bss_start = .; *(.sbss) *(.scommon) - *(.bss) + *(.bss*) *(COMMON) . = ALIGN(4); __bss_end = .;