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From: Felix Fietkau <nbd@openwrt.org>
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use -ffunction-sections, -fdata-sections and --gc-sections
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In combination with kernel symbol export stripping this significantly reduces
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the kernel image size. Used on both ARM and MIPS architectures.
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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Signed-off-by: Jonas Gorski <jogo@openwrt.org>
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Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
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---
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--- a/arch/mips/Makefile
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+++ b/arch/mips/Makefile
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@@ -89,10 +89,14 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlin
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#
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cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
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cflags-y += -msoft-float
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-LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
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+LDFLAGS_vmlinux += -G 0 -static -n -nostdlib --gc-sections
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KBUILD_AFLAGS_MODULE += -mlong-calls
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KBUILD_CFLAGS_MODULE += -mlong-calls
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+ifndef CONFIG_FUNCTION_TRACER
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+KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
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+endif
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+
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#
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# pass -msoft-float to GAS if it supports it. However on newer binutils
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# (specifically newer than 2.24.51.20140728) we then also need to explicitly
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--- a/arch/mips/kernel/vmlinux.lds.S
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+++ b/arch/mips/kernel/vmlinux.lds.S
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@@ -67,7 +67,7 @@ SECTIONS
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/* Exception table for data bus errors */
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__dbe_table : {
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__start___dbe_table = .;
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- *(__dbe_table)
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+ KEEP(*(__dbe_table))
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__stop___dbe_table = .;
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}
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@@ -112,7 +112,7 @@ SECTIONS
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. = ALIGN(4);
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.mips.machines.init : AT(ADDR(.mips.machines.init) - LOAD_OFFSET) {
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__mips_machines_start = .;
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- *(.mips.machines.init)
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+ KEEP(*(.mips.machines.init))
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__mips_machines_end = .;
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}
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--- a/include/asm-generic/vmlinux.lds.h
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+++ b/include/asm-generic/vmlinux.lds.h
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@@ -89,7 +89,7 @@
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#ifdef CONFIG_FTRACE_MCOUNT_RECORD
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#define MCOUNT_REC() . = ALIGN(8); \
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VMLINUX_SYMBOL(__start_mcount_loc) = .; \
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- *(__mcount_loc) \
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+ KEEP(*(__mcount_loc)) \
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VMLINUX_SYMBOL(__stop_mcount_loc) = .;
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#else
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#define MCOUNT_REC()
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@@ -97,7 +97,7 @@
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#ifdef CONFIG_TRACE_BRANCH_PROFILING
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#define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
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- *(_ftrace_annotated_branch) \
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+ KEEP(*(_ftrace_annotated_branch)) \
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VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
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#else
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#define LIKELY_PROFILE()
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@@ -105,7 +105,7 @@
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#ifdef CONFIG_PROFILE_ALL_BRANCHES
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#define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
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- *(_ftrace_branch) \
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+ KEEP(*(_ftrace_branch)) \
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VMLINUX_SYMBOL(__stop_branch_profile) = .;
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#else
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#define BRANCH_PROFILE()
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@@ -114,7 +114,7 @@
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#ifdef CONFIG_KPROBES
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#define KPROBE_BLACKLIST() . = ALIGN(8); \
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VMLINUX_SYMBOL(__start_kprobe_blacklist) = .; \
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- *(_kprobe_blacklist) \
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+ KEEP(*(_kprobe_blacklist)) \
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VMLINUX_SYMBOL(__stop_kprobe_blacklist) = .;
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#else
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#define KPROBE_BLACKLIST()
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@@ -123,7 +123,7 @@
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#ifdef CONFIG_EVENT_TRACING
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#define FTRACE_EVENTS() . = ALIGN(8); \
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VMLINUX_SYMBOL(__start_ftrace_events) = .; \
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- *(_ftrace_events) \
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+ KEEP(*(_ftrace_events)) \
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VMLINUX_SYMBOL(__stop_ftrace_events) = .;
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#else
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#define FTRACE_EVENTS()
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@@ -131,7 +131,7 @@
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#ifdef CONFIG_TRACING
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#define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
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- *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
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+ KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
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VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
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#define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \
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*(__tracepoint_str) /* Trace_printk fmt' pointer */ \
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@@ -144,7 +144,7 @@
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#ifdef CONFIG_FTRACE_SYSCALLS
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#define TRACE_SYSCALLS() . = ALIGN(8); \
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VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
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- *(__syscalls_metadata) \
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+ KEEP(*(__syscalls_metadata)) \
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VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
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#else
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#define TRACE_SYSCALLS()
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@@ -158,8 +158,8 @@
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#define _OF_TABLE_1(name) \
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. = ALIGN(8); \
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VMLINUX_SYMBOL(__##name##_of_table) = .; \
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- *(__##name##_of_table) \
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- *(__##name##_of_table_end)
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+ KEEP(*(__##name##_of_table)) \
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+ KEEP(*(__##name##_of_table_end))
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#define CLKSRC_OF_TABLES() OF_TABLE(CONFIG_CLKSRC_OF, clksrc)
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#define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
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@@ -172,7 +172,7 @@
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#define KERNEL_DTB() \
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STRUCT_ALIGN(); \
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VMLINUX_SYMBOL(__dtb_start) = .; \
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- *(.dtb.init.rodata) \
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+ KEEP(*(.dtb.init.rodata)) \
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VMLINUX_SYMBOL(__dtb_end) = .;
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/* .data section */
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@@ -188,16 +188,17 @@
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/* implement dynamic printk debug */ \
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. = ALIGN(8); \
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VMLINUX_SYMBOL(__start___jump_table) = .; \
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- *(__jump_table) \
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+ KEEP(*(__jump_table)) \
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VMLINUX_SYMBOL(__stop___jump_table) = .; \
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. = ALIGN(8); \
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VMLINUX_SYMBOL(__start___verbose) = .; \
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- *(__verbose) \
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+ KEEP(*(__verbose)) \
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VMLINUX_SYMBOL(__stop___verbose) = .; \
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LIKELY_PROFILE() \
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BRANCH_PROFILE() \
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TRACE_PRINTKS() \
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- TRACEPOINT_STR()
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+ TRACEPOINT_STR() \
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+ *(.data.[a-zA-Z_]*)
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/*
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* Data section helpers
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@@ -251,35 +252,35 @@
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/* PCI quirks */ \
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.pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
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- *(.pci_fixup_early) \
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+ KEEP(*(.pci_fixup_early)) \
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VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
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- *(.pci_fixup_header) \
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+ KEEP(*(.pci_fixup_header)) \
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VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
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- *(.pci_fixup_final) \
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+ KEEP(*(.pci_fixup_final)) \
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VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
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- *(.pci_fixup_enable) \
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+ KEEP(*(.pci_fixup_enable)) \
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VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
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- *(.pci_fixup_resume) \
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+ KEEP(*(.pci_fixup_resume)) \
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VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
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- *(.pci_fixup_resume_early) \
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+ KEEP(*(.pci_fixup_resume_early)) \
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VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
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- *(.pci_fixup_suspend) \
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+ KEEP(*(.pci_fixup_suspend)) \
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VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
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VMLINUX_SYMBOL(__start_pci_fixups_suspend_late) = .; \
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- *(.pci_fixup_suspend_late) \
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+ KEEP(*(.pci_fixup_suspend_late)) \
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VMLINUX_SYMBOL(__end_pci_fixups_suspend_late) = .; \
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} \
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\
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/* Built-in firmware blobs */ \
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.builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start_builtin_fw) = .; \
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- *(.builtin_fw) \
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+ KEEP(*(.builtin_fw)) \
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VMLINUX_SYMBOL(__end_builtin_fw) = .; \
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} \
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\
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@@ -288,49 +289,49 @@
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/* Kernel symbol table: Normal symbols */ \
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__ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___ksymtab) = .; \
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- *(SORT(___ksymtab+*)) \
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+ KEEP(*(SORT(___ksymtab+*))) \
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VMLINUX_SYMBOL(__stop___ksymtab) = .; \
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} \
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\
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/* Kernel symbol table: GPL-only symbols */ \
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__ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
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- *(SORT(___ksymtab_gpl+*)) \
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+ KEEP(*(SORT(___ksymtab_gpl+*))) \
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VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
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} \
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\
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/* Kernel symbol table: Normal unused symbols */ \
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__ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
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- *(SORT(___ksymtab_unused+*)) \
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+ KEEP(*(SORT(___ksymtab_unused+*))) \
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VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
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} \
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\
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/* Kernel symbol table: GPL-only unused symbols */ \
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__ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
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- *(SORT(___ksymtab_unused_gpl+*)) \
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+ KEEP(*(SORT(___ksymtab_unused_gpl+*))) \
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VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
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} \
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\
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/* Kernel symbol table: GPL-future-only symbols */ \
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__ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
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- *(SORT(___ksymtab_gpl_future+*)) \
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+ KEEP(*(SORT(___ksymtab_gpl_future+*))) \
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VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
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} \
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\
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/* Kernel symbol table: Normal symbols */ \
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__kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___kcrctab) = .; \
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- *(SORT(___kcrctab+*)) \
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+ KEEP(*(SORT(___kcrctab+*))) \
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VMLINUX_SYMBOL(__stop___kcrctab) = .; \
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} \
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\
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/* Kernel symbol table: GPL-only symbols */ \
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__kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
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- *(SORT(___kcrctab_gpl+*)) \
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+ KEEP(*(SORT(___kcrctab_gpl+*))) \
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VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
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} \
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\
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@@ -344,14 +345,14 @@
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/* Kernel symbol table: GPL-only unused symbols */ \
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__kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
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- *(SORT(___kcrctab_unused_gpl+*)) \
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+ KEEP(*(SORT(___kcrctab_unused_gpl+*))) \
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VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
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} \
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\
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/* Kernel symbol table: GPL-future-only symbols */ \
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__kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
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VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
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- *(SORT(___kcrctab_gpl_future+*)) \
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+ KEEP(*(SORT(___kcrctab_gpl_future+*))) \
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VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
|
|
|
|
|
} \
|
|
|
|
|
\
|
|
|
|
|
@@ -370,14 +371,14 @@
|
|
|
|
|
/* Built-in module parameters. */ \
|
|
|
|
|
__param : AT(ADDR(__param) - LOAD_OFFSET) { \
|
|
|
|
|
VMLINUX_SYMBOL(__start___param) = .; \
|
|
|
|
|
- *(__param) \
|
|
|
|
|
+ KEEP(*(__param)) \
|
|
|
|
|
VMLINUX_SYMBOL(__stop___param) = .; \
|
|
|
|
|
} \
|
|
|
|
|
\
|
|
|
|
|
/* Built-in module versions. */ \
|
|
|
|
|
__modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
|
|
|
|
|
VMLINUX_SYMBOL(__start___modver) = .; \
|
|
|
|
|
- *(__modver) \
|
|
|
|
|
+ KEEP(*(__modver)) \
|
|
|
|
|
VMLINUX_SYMBOL(__stop___modver) = .; \
|
|
|
|
|
. = ALIGN((align)); \
|
|
|
|
|
VMLINUX_SYMBOL(__end_rodata) = .; \
|
|
|
|
|
@@ -433,7 +434,7 @@
|
|
|
|
|
#define ENTRY_TEXT \
|
|
|
|
|
ALIGN_FUNCTION(); \
|
|
|
|
|
VMLINUX_SYMBOL(__entry_text_start) = .; \
|
|
|
|
|
- *(.entry.text) \
|
|
|
|
|
+ KEEP(*(.entry.text)) \
|
|
|
|
|
VMLINUX_SYMBOL(__entry_text_end) = .;
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
|
|
|
|
|
@@ -461,7 +462,7 @@
|
|
|
|
|
. = ALIGN(align); \
|
|
|
|
|
__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
|
|
|
|
|
VMLINUX_SYMBOL(__start___ex_table) = .; \
|
|
|
|
|
- *(__ex_table) \
|
|
|
|
|
+ KEEP(*(__ex_table)) \
|
|
|
|
|
VMLINUX_SYMBOL(__stop___ex_table) = .; \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
@@ -477,9 +478,9 @@
|
|
|
|
|
#ifdef CONFIG_CONSTRUCTORS
|
|
|
|
|
#define KERNEL_CTORS() . = ALIGN(8); \
|
|
|
|
|
VMLINUX_SYMBOL(__ctors_start) = .; \
|
|
|
|
|
- *(.ctors) \
|
|
|
|
|
+ KEEP(*(.ctors)) \
|
|
|
|
|
*(SORT(.init_array.*)) \
|
|
|
|
|
- *(.init_array) \
|
|
|
|
|
+ KEEP(*(.init_array)) \
|
|
|
|
|
VMLINUX_SYMBOL(__ctors_end) = .;
|
|
|
|
|
#else
|
|
|
|
|
#define KERNEL_CTORS()
|
|
|
|
|
@@ -528,7 +529,7 @@
|
|
|
|
|
#define SBSS(sbss_align) \
|
|
|
|
|
. = ALIGN(sbss_align); \
|
|
|
|
|
.sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
|
|
|
|
|
- *(.sbss) \
|
|
|
|
|
+ *(.sbss .sbss.*) \
|
|
|
|
|
*(.scommon) \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
@@ -546,7 +547,7 @@
|
|
|
|
|
BSS_FIRST_SECTIONS \
|
|
|
|
|
*(.bss..page_aligned) \
|
|
|
|
|
*(.dynbss) \
|
|
|
|
|
- *(.bss) \
|
|
|
|
|
+ *(.bss .bss.*) \
|
|
|
|
|
*(COMMON) \
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
@@ -595,7 +596,7 @@
|
|
|
|
|
. = ALIGN(8); \
|
|
|
|
|
__bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
|
|
|
|
|
VMLINUX_SYMBOL(__start___bug_table) = .; \
|
|
|
|
|
- *(__bug_table) \
|
|
|
|
|
+ KEEP(*(__bug_table)) \
|
|
|
|
|
VMLINUX_SYMBOL(__stop___bug_table) = .; \
|
|
|
|
|
}
|
|
|
|
|
#else
|
|
|
|
|
@@ -607,7 +608,7 @@
|
|
|
|
|
. = ALIGN(4); \
|
|
|
|
|
.tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
|
|
|
|
|
VMLINUX_SYMBOL(__tracedata_start) = .; \
|
|
|
|
|
- *(.tracedata) \
|
|
|
|
|
+ KEEP(*(.tracedata)) \
|
|
|
|
|
VMLINUX_SYMBOL(__tracedata_end) = .; \
|
|
|
|
|
}
|
|
|
|
|
#else
|
|
|
|
|
@@ -624,17 +625,17 @@
|
|
|
|
|
#define INIT_SETUP(initsetup_align) \
|
|
|
|
|
. = ALIGN(initsetup_align); \
|
|
|
|
|
VMLINUX_SYMBOL(__setup_start) = .; \
|
|
|
|
|
- *(.init.setup) \
|
|
|
|
|
+ KEEP(*(.init.setup)) \
|
|
|
|
|
VMLINUX_SYMBOL(__setup_end) = .;
|
|
|
|
|
|
|
|
|
|
#define INIT_CALLS_LEVEL(level) \
|
|
|
|
|
VMLINUX_SYMBOL(__initcall##level##_start) = .; \
|
|
|
|
|
- *(.initcall##level##.init) \
|
|
|
|
|
- *(.initcall##level##s.init) \
|
|
|
|
|
+ KEEP(*(.initcall##level##.init)) \
|
|
|
|
|
+ KEEP(*(.initcall##level##s.init)) \
|
|
|
|
|
|
|
|
|
|
#define INIT_CALLS \
|
|
|
|
|
VMLINUX_SYMBOL(__initcall_start) = .; \
|
|
|
|
|
- *(.initcallearly.init) \
|
|
|
|
|
+ KEEP(*(.initcallearly.init)) \
|
|
|
|
|
INIT_CALLS_LEVEL(0) \
|
|
|
|
|
INIT_CALLS_LEVEL(1) \
|
|
|
|
|
INIT_CALLS_LEVEL(2) \
|
|
|
|
|
@@ -648,21 +649,21 @@
|
|
|
|
|
|
|
|
|
|
#define CON_INITCALL \
|
|
|
|
|
VMLINUX_SYMBOL(__con_initcall_start) = .; \
|
|
|
|
|
- *(.con_initcall.init) \
|
|
|
|
|
+ KEEP(*(.con_initcall.init)) \
|
|
|
|
|
VMLINUX_SYMBOL(__con_initcall_end) = .;
|
|
|
|
|
|
|
|
|
|
#define SECURITY_INITCALL \
|
|
|
|
|
VMLINUX_SYMBOL(__security_initcall_start) = .; \
|
|
|
|
|
- *(.security_initcall.init) \
|
|
|
|
|
+ KEEP(*(.security_initcall.init)) \
|
|
|
|
|
VMLINUX_SYMBOL(__security_initcall_end) = .;
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
|
|
|
#define INIT_RAM_FS \
|
|
|
|
|
. = ALIGN(4); \
|
|
|
|
|
VMLINUX_SYMBOL(__initramfs_start) = .; \
|
|
|
|
|
- *(.init.ramfs) \
|
|
|
|
|
+ KEEP(*(.init.ramfs)) \
|
|
|
|
|
. = ALIGN(8); \
|
|
|
|
|
- *(.init.ramfs.info)
|
|
|
|
|
+ KEEP(*(.init.ramfs.info))
|
|
|
|
|
#else
|
|
|
|
|
#define INIT_RAM_FS
|
|
|
|
|
#endif
|
|
|
|
|
--- a/arch/arm/Makefile
|
|
|
|
|
+++ b/arch/arm/Makefile
|
|
|
|
|
@@ -18,11 +18,16 @@ ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
|
|
|
|
|
LDFLAGS_vmlinux += --be8
|
|
|
|
|
LDFLAGS_MODULE += --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
|
|
|
|
|
@@ -15,13 +15,13 @@
|
|
|
|
|
#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) = .; \
|
|
|
|
|
. = ALIGN(32); \
|
|
|
|
|
VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
|
|
|
|
|
@@ -101,7 +101,7 @@ SECTIONS
|
|
|
|
|
.text : { /* Real text segment */
|
|
|
|
|
_stext = .; /* Text and read-only data */
|
|
|
|
|
__exception_text_start = .;
|
|
|
|
|
- *(.exception.text)
|
|
|
|
|
+ KEEP(*(.exception.text))
|
|
|
|
|
__exception_text_end = .;
|
|
|
|
|
IRQENTRY_TEXT
|
|
|
|
|
TEXT_TEXT
|
|
|
|
|
@@ -129,7 +129,7 @@ SECTIONS
|
|
|
|
|
__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
|
|
|
|
|
__start___ex_table = .;
|
|
|
|
|
#ifdef CONFIG_MMU
|
|
|
|
|
- *(__ex_table)
|
|
|
|
|
+ KEEP(*(__ex_table))
|
|
|
|
|
#endif
|
|
|
|
|
__stop___ex_table = .;
|
|
|
|
|
}
|
|
|
|
|
@@ -141,12 +141,12 @@ 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
|
|
|
|
|
@@ -169,14 +169,14 @@ SECTIONS
|
|
|
|
|
*/
|
|
|
|
|
__vectors_start = .;
|
|
|
|
|
.vectors 0 : AT(__vectors_start) {
|
|
|
|
|
- *(.vectors)
|
|
|
|
|
+ KEEP(*(.vectors))
|
|
|
|
|
}
|
|
|
|
|
. = __vectors_start + SIZEOF(.vectors);
|
|
|
|
|
__vectors_end = .;
|
|
|
|
|
|
|
|
|
|
__stubs_start = .;
|
|
|
|
|
.stubs 0x1000 : AT(__stubs_start) {
|
|
|
|
|
- *(.stubs)
|
|
|
|
|
+ KEEP(*(.stubs))
|
|
|
|
|
}
|
|
|
|
|
. = __stubs_start + SIZEOF(.stubs);
|
|
|
|
|
__stubs_end = .;
|
|
|
|
|
@@ -190,24 +190,24 @@ 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 : {
|
|
|
|
|
--- a/arch/arm/boot/compressed/Makefile
|
|
|
|
|
+++ b/arch/arm/boot/compressed/Makefile
|
|
|
|
|
@@ -122,6 +122,7 @@ 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))
|
|
|
|
|
|
|
|
|
|
ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
|
|
|
|
|
asflags-y := -DZIMAGE
|
