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| author | Felix Fietkau <nbd@openwrt.org> | 2013-03-10 14:51:42 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2013-03-10 14:51:42 +0000 |
| commit | 5191a29832336245da210430494a64670d6c7eaa (patch) | |
| tree | 7794559fc16e8e025bc93e60f5b91071cb286642 /target/linux/generic | |
| parent | 6e10211b7138e626218bc8713141e3b5d999ad29 (diff) | |
| download | upstream-5191a29832336245da210430494a64670d6c7eaa.tar.gz upstream-5191a29832336245da210430494a64670d6c7eaa.tar.bz2 upstream-5191a29832336245da210430494a64670d6c7eaa.zip | |
kernel: use -ffunction-sections, -fdata-sections and --gc-sections on ARM to reduce kernel image size, disable those flags when tracing on MIPS to fix compile errors
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35936 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic')
| -rw-r--r-- | target/linux/generic/patches-3.8/220-gc_sections.patch | 94 | ||||
| -rw-r--r-- | target/linux/generic/patches-3.8/305-mips_module_reloc.patch | 2 |
2 files changed, 94 insertions, 2 deletions
diff --git a/target/linux/generic/patches-3.8/220-gc_sections.patch b/target/linux/generic/patches-3.8/220-gc_sections.patch index 0edba22757..5fb54a2872 100644 --- a/target/linux/generic/patches-3.8/220-gc_sections.patch +++ b/target/linux/generic/patches-3.8/220-gc_sections.patch @@ -1,6 +1,6 @@ --- a/arch/mips/Makefile +++ b/arch/mips/Makefile -@@ -89,10 +89,12 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlin +@@ -89,10 +89,14 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlin # cflags-y += -G 0 -mno-abicalls -fno-pic -pipe cflags-y += -msoft-float @@ -9,7 +9,9 @@ KBUILD_AFLAGS_MODULE += -mlong-calls KBUILD_CFLAGS_MODULE += -mlong-calls ++ifndef CONFIG_FUNCTION_TRACER +KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections ++endif + cflags-y += -ffreestanding @@ -370,3 +372,93 @@ #else #define INIT_RAM_FS #endif +--- a/arch/arm/Makefile ++++ b/arch/arm/Makefile +@@ -17,11 +17,16 @@ LDFLAGS_vmlinux :=-p --no-undefined -X + ifeq ($(CONFIG_CPU_ENDIAN_BE8),y) + LDFLAGS_vmlinux += --be8 + endif ++LDFLAGS_vmlinux += --gc-sections + + OBJCOPYFLAGS :=-O binary -R .comment -S + GZFLAGS :=-9 + #KBUILD_CFLAGS +=-pipe + ++ifndef CONFIG_FUNCTION_TRACER ++KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections ++endif ++ + # Never generate .eh_frame + KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) + +--- a/arch/arm/kernel/vmlinux.lds.S ++++ b/arch/arm/kernel/vmlinux.lds.S +@@ -12,13 +12,13 @@ + #define PROC_INFO \ + . = ALIGN(4); \ + VMLINUX_SYMBOL(__proc_info_begin) = .; \ +- *(.proc.info.init) \ ++ KEEP(*(.proc.info.init)) \ + VMLINUX_SYMBOL(__proc_info_end) = .; + + #define IDMAP_TEXT \ + ALIGN_FUNCTION(); \ + VMLINUX_SYMBOL(__idmap_text_start) = .; \ +- *(.idmap.text) \ ++ KEEP(*(.idmap.text)) \ + VMLINUX_SYMBOL(__idmap_text_end) = .; + + #ifdef CONFIG_HOTPLUG_CPU +@@ -118,7 +118,7 @@ SECTIONS + __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { + __start___ex_table = .; + #ifdef CONFIG_MMU +- *(__ex_table) ++ KEEP(*(__ex_table)) + #endif + __stop___ex_table = .; + } +@@ -130,12 +130,12 @@ SECTIONS + . = ALIGN(8); + .ARM.unwind_idx : { + __start_unwind_idx = .; +- *(.ARM.exidx*) ++ KEEP(*(.ARM.exidx*)) + __stop_unwind_idx = .; + } + .ARM.unwind_tab : { + __start_unwind_tab = .; +- *(.ARM.extab*) ++ KEEP(*(.ARM.extab*)) + __stop_unwind_tab = .; + } + #endif +@@ -158,24 +158,24 @@ SECTIONS + } + .init.arch.info : { + __arch_info_begin = .; +- *(.arch.info.init) ++ KEEP(*(.arch.info.init)) + __arch_info_end = .; + } + .init.tagtable : { + __tagtable_begin = .; +- *(.taglist.init) ++ KEEP(*(.taglist.init)) + __tagtable_end = .; + } + #ifdef CONFIG_SMP_ON_UP + .init.smpalt : { + __smpalt_begin = .; +- *(.alt.smp.init) ++ KEEP(*(.alt.smp.init)) + __smpalt_end = .; + } + #endif + .init.pv_table : { + __pv_table_begin = .; +- *(.pv_table) ++ KEEP(*(.pv_table)) + __pv_table_end = .; + } + .init.data : { diff --git a/target/linux/generic/patches-3.8/305-mips_module_reloc.patch b/target/linux/generic/patches-3.8/305-mips_module_reloc.patch index f0f513741d..98d4c1d8a4 100644 --- a/target/linux/generic/patches-3.8/305-mips_module_reloc.patch +++ b/target/linux/generic/patches-3.8/305-mips_module_reloc.patch @@ -12,8 +12,8 @@ +KBUILD_CFLAGS_MODULE += -mno-long-calls +endif + ifndef CONFIG_FUNCTION_TRACER KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections - --- a/arch/mips/include/asm/module.h +++ b/arch/mips/include/asm/module.h @@ -11,6 +11,11 @@ struct mod_arch_specific { |