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authornbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2013-01-26 16:26:13 +0000
committernbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73>2013-01-26 16:26:13 +0000
commitedf06589cc0ad9474b6c17aa84af90a932eaca13 (patch)
tree24d7f96936770d3e3ee904982008bfcf174acc7e /target/linux/generic/patches-3.7/220-module_exports.patch
parent0a3970a70de5376f9a7ddef0c0b68acf9eb8caab (diff)
kernel: use -ffunction-sections, -fdata-sections and --gc-sections on mips
in combination with kernel symbol export stripping this significantly reduces the kernel image size git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35320 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic/patches-3.7/220-module_exports.patch')
-rw-r--r--target/linux/generic/patches-3.7/220-module_exports.patch91
1 files changed, 0 insertions, 91 deletions
diff --git a/target/linux/generic/patches-3.7/220-module_exports.patch b/target/linux/generic/patches-3.7/220-module_exports.patch
deleted file mode 100644
index fc382c16f..000000000
--- a/target/linux/generic/patches-3.7/220-module_exports.patch
+++ /dev/null
@@ -1,91 +0,0 @@
---- a/include/asm-generic/vmlinux.lds.h
-+++ b/include/asm-generic/vmlinux.lds.h
-@@ -52,6 +52,18 @@
- #define LOAD_OFFSET 0
- #endif
-
-+#ifndef SYMTAB_KEEP_STR
-+#define SYMTAB_KEEP *(SORT(___ksymtab+*))
-+#define SYMTAB_KEEP_GPL *(SORT(___ksymtab_gpl+*))
-+#define SYMTAB_KEEP_STR *(__ksymtab_strings+*)
-+#endif
-+
-+#ifndef SYMTAB_DISCARD
-+#define SYMTAB_DISCARD
-+#define SYMTAB_DISCARD_GPL
-+#define SYMTAB_DISCARD_STR
-+#endif
-+
- #ifndef SYMBOL_PREFIX
- #define VMLINUX_SYMBOL(sym) sym
- #else
-@@ -276,14 +288,14 @@
- /* Kernel symbol table: Normal symbols */ \
- __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
- VMLINUX_SYMBOL(__start___ksymtab) = .; \
-- *(SORT(___ksymtab+*)) \
-+ SYMTAB_KEEP \
- VMLINUX_SYMBOL(__stop___ksymtab) = .; \
- } \
- \
- /* Kernel symbol table: GPL-only symbols */ \
- __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
- VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
-- *(SORT(___ksymtab_gpl+*)) \
-+ SYMTAB_KEEP_GPL \
- VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
- } \
- \
-@@ -345,7 +357,7 @@
- \
- /* Kernel symbol table: strings */ \
- __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
-- *(__ksymtab_strings) \
-+ SYMTAB_KEEP_STR \
- } \
- \
- /* __*init sections */ \
-@@ -679,6 +691,9 @@
- EXIT_TEXT \
- EXIT_DATA \
- EXIT_CALL \
-+ SYMTAB_DISCARD \
-+ SYMTAB_DISCARD_GPL \
-+ SYMTAB_DISCARD_STR \
- *(.discard) \
- *(.discard.*) \
- }
---- a/include/linux/export.h
-+++ b/include/linux/export.h
-@@ -45,12 +45,19 @@ extern struct module __this_module;
- #define __CRC_SYMBOL(sym, sec)
- #endif
-
-+#ifdef MODULE
-+#define __EXPORT_SUFFIX(sym)
-+#else
-+#define __EXPORT_SUFFIX(sym) "+" #sym
-+#endif
-+
- /* For every exported symbol, place a struct in the __ksymtab section */
- #define __EXPORT_SYMBOL(sym, sec) \
- extern typeof(sym) sym; \
- __CRC_SYMBOL(sym, sec) \
- static const char __kstrtab_##sym[] \
-- __attribute__((section("__ksymtab_strings"), aligned(1))) \
-+ __attribute__((section("__ksymtab_strings" \
-+ __EXPORT_SUFFIX(sym)), aligned(1))) \
- = MODULE_SYMBOL_PREFIX #sym; \
- static const struct kernel_symbol __ksymtab_##sym \
- __used \
---- a/scripts/Makefile.build
-+++ b/scripts/Makefile.build
-@@ -348,7 +348,7 @@ targets += $(extra-y) $(MAKECMDGOALS) $(
- # Linker scripts preprocessor (.lds.S -> .lds)
- # ---------------------------------------------------------------------------
- quiet_cmd_cpp_lds_S = LDS $@
-- cmd_cpp_lds_S = $(CPP) $(cpp_flags) -P -C -U$(ARCH) \
-+ cmd_cpp_lds_S = $(CPP) $(EXTRA_LDSFLAGS) $(cpp_flags) -P -C -U$(ARCH) \
- -D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<
-
- $(obj)/%.lds: $(src)/%.lds.S FORCE