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authorJohn Crispin <john@phrozen.org>2016-12-25 20:11:34 +0100
committerJohn Crispin <john@phrozen.org>2017-08-05 08:46:36 +0200
commit74d00a8c3849c1340efd713eb94b786e304c201f (patch)
treede481743de61c34da96ab5f9dba3af3edcfb8260 /target/linux/generic/hack-4.9/221-module_exports.patch
parentde350550ef648d9728351b986b0516fa29465c45 (diff)
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kernel: split patches folder up into backport, pending and hack folders
* properly format/comment all patches * merge debloat patches * merge Kconfig patches * merge swconfig patches * merge hotplug patches * drop 200-fix_localversion.patch - upstream * drop 222-arm_zimage_none.patch - unused * drop 252-mv_cesa_depends.patch - no longer required * drop 410-mtd-move-forward-declaration-of-struct-mtd_info.patch - unused * drop 661-fq_codel_keep_dropped_stats.patch - outdated * drop 702-phy_add_aneg_done_function.patch - upstream * drop 840-rtc7301.patch - unused * drop 841-rtc_pt7c4338.patch - upstream * drop 921-use_preinit_as_init.patch - unused * drop spio-gpio-old and gpio-mmc - unused Signed-off-by: John Crispin <john@phrozen.org>
Diffstat (limited to 'target/linux/generic/hack-4.9/221-module_exports.patch')
-rw-r--r--target/linux/generic/hack-4.9/221-module_exports.patch110
1 files changed, 110 insertions, 0 deletions
diff --git a/target/linux/generic/hack-4.9/221-module_exports.patch b/target/linux/generic/hack-4.9/221-module_exports.patch
new file mode 100644
index 0000000000..301eb3b2b4
--- /dev/null
+++ b/target/linux/generic/hack-4.9/221-module_exports.patch
@@ -0,0 +1,110 @@
+From b14784e7883390c20ed3ff904892255404a5914b Mon Sep 17 00:00:00 2001
+From: Felix Fietkau <nbd@nbd.name>
+Date: Fri, 7 Jul 2017 17:05:53 +0200
+Subject: add an optional config option for stripping all unnecessary symbol exports from the kernel image
+
+lede-commit: bb5a40c64b7c4f4848509fa0a6625055fc9e66cc
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ include/asm-generic/vmlinux.lds.h | 18 +++++++++++++++---
+ include/linux/export.h | 9 ++++++++-
+ scripts/Makefile.build | 2 +-
+ 3 files changed, 24 insertions(+), 5 deletions(-)
+
+diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
+index 83784d9492b1..189b5c7a0758 100644
+--- a/include/asm-generic/vmlinux.lds.h
++++ b/include/asm-generic/vmlinux.lds.h
+@@ -54,6 +54,16 @@
+ #define LOAD_OFFSET 0
+ #endif
+
++#ifndef SYMTAB_KEEP
++#define SYMTAB_KEEP KEEP(*(SORT(___ksymtab+*)))
++#define SYMTAB_KEEP_GPL KEEP(*(SORT(___ksymtab_gpl+*)))
++#endif
++
++#ifndef SYMTAB_DISCARD
++#define SYMTAB_DISCARD
++#define SYMTAB_DISCARD_GPL
++#endif
++
+ #include <linux/export.h>
+
+ /* Align . to a 8 byte boundary equals to maximum function alignment. */
+@@ -329,14 +339,14 @@
+ /* Kernel symbol table: Normal symbols */ \
+ __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
+ VMLINUX_SYMBOL(__start___ksymtab) = .; \
+- KEEP(*(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) = .; \
+- KEEP(*(SORT(___ksymtab_gpl+*))) \
++ SYMTAB_KEEP_GPL \
+ VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
+ } \
+ \
+@@ -398,7 +408,7 @@
+ \
+ /* Kernel symbol table: strings */ \
+ __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
+- *(__ksymtab_strings) \
++ *(__ksymtab_strings+*) \
+ } \
+ \
+ /* __*init sections */ \
+@@ -749,6 +759,8 @@
+ EXIT_TEXT \
+ EXIT_DATA \
+ EXIT_CALL \
++ SYMTAB_DISCARD \
++ SYMTAB_DISCARD_GPL \
+ *(.discard) \
+ *(.discard.*) \
+ }
+diff --git a/include/linux/export.h b/include/linux/export.h
+index 2a0f61fbc731..889331d9643d 100644
+--- a/include/linux/export.h
++++ b/include/linux/export.h
+@@ -53,12 +53,19 @@ 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))) \
+ = VMLINUX_SYMBOL_STR(sym); \
+ static const struct kernel_symbol __ksymtab_##sym \
+ __used \
+diff --git a/scripts/Makefile.build b/scripts/Makefile.build
+index 108d73273788..76a0e450123c 100644
+--- a/scripts/Makefile.build
++++ b/scripts/Makefile.build
+@@ -398,7 +398,7 @@ targets += $(extra-y) $(MAKECMDGOALS) $(always)
+ # 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
+--
+2.11.0
+