diff options
Diffstat (limited to 'target/linux/generic/hack-4.19/220-gc_sections.patch')
| -rw-r--r-- | target/linux/generic/hack-4.19/220-gc_sections.patch | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/target/linux/generic/hack-4.19/220-gc_sections.patch b/target/linux/generic/hack-4.19/220-gc_sections.patch deleted file mode 100644 index d6fc94646e..0000000000 --- a/target/linux/generic/hack-4.19/220-gc_sections.patch +++ /dev/null @@ -1,192 +0,0 @@ -From e3d8676f5722b7622685581e06e8f53e6138e3ab Mon Sep 17 00:00:00 2001 -From: Felix Fietkau <nbd@nbd.name> -Date: Sat, 15 Jul 2017 23:42:36 +0200 -Subject: use -ffunction-sections, -fdata-sections and --gc-sections - -In combination with kernel symbol export stripping this significantly reduces -the kernel image size. Used on both ARM and MIPS architectures. - -Signed-off-by: Felix Fietkau <nbd@nbd.name> -Signed-off-by: Jonas Gorski <jogo@openwrt.org> -Signed-off-by: Gabor Juhos <juhosg@openwrt.org> ---- - Makefile | 10 +++---- - arch/arm/Kconfig | 1 + - arch/arm/boot/compressed/Makefile | 1 + - arch/arm/kernel/vmlinux.lds.S | 26 ++++++++-------- - arch/mips/Kconfig | 1 + - arch/mips/kernel/vmlinux.lds.S | 4 +-- - include/asm-generic/vmlinux.lds.h | 63 ++++++++++++++++++++------------------- - 7 files changed, 55 insertions(+), 51 deletions(-) - ---- a/Makefile -+++ b/Makefile -@@ -294,6 +294,11 @@ else - scripts/Kbuild.include: ; - include scripts/Kbuild.include - -+ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION -+KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections -+LDFLAGS_vmlinux += --gc-sections -+endif -+ - # Read KERNELRELEASE from include/config/kernel.release (if it exists) - KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null) - KERNELVERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION) -@@ -780,11 +785,6 @@ ifdef CONFIG_DEBUG_SECTION_MISMATCH - KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) - endif - --ifdef CONFIG_LD_DEAD_CODE_DATA_ELIMINATION --KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections --LDFLAGS_vmlinux += --gc-sections --endif -- - # arch Makefile may override CC so keep this after arch Makefile is included - NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) - ---- a/arch/arm/Kconfig -+++ b/arch/arm/Kconfig -@@ -98,6 +98,7 @@ config ARM - select HAVE_UID16 - select HAVE_VIRT_CPU_ACCOUNTING_GEN - select IRQ_FORCED_THREADING -+ select HAVE_LD_DEAD_CODE_DATA_ELIMINATION - select MODULES_USE_ELF_REL - select NEED_DMA_MAP_STATE - select NO_BOOTMEM ---- a/arch/arm/boot/compressed/Makefile -+++ b/arch/arm/boot/compressed/Makefile -@@ -106,6 +106,7 @@ ifeq ($(CONFIG_FUNCTION_TRACER),y) - ORIG_CFLAGS := $(KBUILD_CFLAGS) - KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS)) - endif -+KBUILD_CFLAGS_KERNEL := $(patsubst -f%-sections,,$(KBUILD_CFLAGS_KERNEL)) - - # -fstack-protector-strong triggers protection checks in this code, - # but it is being used too early to link to meaningful stack_chk logic. ---- a/arch/arm/kernel/vmlinux.lds.S -+++ b/arch/arm/kernel/vmlinux.lds.S -@@ -100,24 +100,24 @@ 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 = .; - } - ---- a/arch/arm/kernel/vmlinux.lds.h -+++ b/arch/arm/kernel/vmlinux.lds.h -@@ -22,13 +22,13 @@ - #define ARM_MMU_DISCARD(x) - #else - #define ARM_MMU_KEEP(x) --#define ARM_MMU_DISCARD(x) x -+#define ARM_MMU_DISCARD(x) KEEP(x) - #endif - - #define PROC_INFO \ - . = ALIGN(4); \ - __proc_info_begin = .; \ -- *(.proc.info.init) \ -+ KEEP(*(.proc.info.init)) \ - __proc_info_end = .; - - #define HYPERVISOR_TEXT \ -@@ -39,11 +39,11 @@ - #define IDMAP_TEXT \ - ALIGN_FUNCTION(); \ - __idmap_text_start = .; \ -- *(.idmap.text) \ -+ KEEP(*(.idmap.text)) \ - __idmap_text_end = .; \ - . = ALIGN(PAGE_SIZE); \ - __hyp_idmap_text_start = .; \ -- *(.hyp.idmap.text) \ -+ KEEP(*(.hyp.idmap.text)) \ - __hyp_idmap_text_end = .; - - #define ARM_DISCARD \ -@@ -86,12 +86,12 @@ - . = 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 = .; \ - } - -@@ -102,14 +102,14 @@ - #define ARM_VECTORS \ - __vectors_start = .; \ - .vectors 0xffff0000 : AT(__vectors_start) { \ -- *(.vectors) \ -+ KEEP(*(.vectors)) \ - } \ - . = __vectors_start + SIZEOF(.vectors); \ - __vectors_end = .; \ - \ - __stubs_start = .; \ - .stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) { \ -- *(.stubs) \ -+ KEEP(*(.stubs)) \ - } \ - . = __stubs_start + SIZEOF(.stubs); \ - __stubs_end = .; \ ---- a/arch/mips/Kconfig -+++ b/arch/mips/Kconfig -@@ -43,6 +43,7 @@ config MIPS - select HAVE_ARCH_TRANSPARENT_HUGEPAGE if CPU_SUPPORTS_HUGEPAGES && 64BIT - select HAVE_CBPF_JIT if (!64BIT && !CPU_MICROMIPS) - select HAVE_EBPF_JIT if (64BIT && !CPU_MICROMIPS) -+ select HAVE_LD_DEAD_CODE_DATA_ELIMINATION - select HAVE_CONTEXT_TRACKING - select HAVE_COPY_THREAD_TLS - select HAVE_C_RECORDMCOUNT ---- a/arch/mips/kernel/vmlinux.lds.S -+++ b/arch/mips/kernel/vmlinux.lds.S -@@ -72,7 +72,7 @@ SECTIONS - /* Exception table for data bus errors */ - __dbe_table : { - __start___dbe_table = .; -- *(__dbe_table) -+ KEEP(*(__dbe_table)) - __stop___dbe_table = .; - } - -@@ -123,7 +123,7 @@ SECTIONS - . = ALIGN(4); - .mips.machines.init : AT(ADDR(.mips.machines.init) - LOAD_OFFSET) { - __mips_machines_start = .; -- *(.mips.machines.init) -+ KEEP(*(.mips.machines.init)) - __mips_machines_end = .; - } - |