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197 lines
5.1 KiB
Diff
197 lines
5.1 KiB
Diff
--- a/include/asm-generic/vmlinux.lds.h
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+++ b/include/asm-generic/vmlinux.lds.h
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@@ -4,6 +4,27 @@
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#define LOAD_OFFSET 0
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#endif
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+#ifndef SYMTAB_KEEP_STR
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+#define SYMTAB_KEEP_STR *(__ksymtab_strings.*)
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+#define SYMTAB_DISCARD_STR
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+#else
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+#define SYMTAB_DISCARD_STR *(__ksymtab_strings.*)
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+#endif
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+
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+#ifndef SYMTAB_KEEP
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+#define SYMTAB_KEEP *(__ksymtab.*)
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+#define SYMTAB_DISCARD
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+#else
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+#define SYMTAB_DISCARD *(__ksymtab.*)
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+#endif
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+
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+#ifndef SYMTAB_KEEP_GPL
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+#define SYMTAB_KEEP_GPL *(__ksymtab_gpl.*)
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+#define SYMTAB_DISCARD_GPL
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+#else
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+#define SYMTAB_DISCARD_GPL *(__ksymtab_gpl.*)
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+#endif
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+
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#ifndef VMLINUX_SYMBOL
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#define VMLINUX_SYMBOL(_sym_) _sym_
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#endif
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@@ -176,35 +197,35 @@
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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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- *(__ksymtab) \
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+ SYMTAB_KEEP \
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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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- *(__ksymtab_gpl) \
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+ SYMTAB_KEEP_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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- *(__ksymtab_unused) \
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+ *(__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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- *(__ksymtab_unused_gpl) \
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+ *(__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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- *(__ksymtab_gpl_future) \
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+ *(__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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@@ -245,7 +266,13 @@
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\
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/* Kernel symbol table: strings */ \
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__ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
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- *(__ksymtab_strings) \
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+ SYMTAB_KEEP_STR \
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+ } \
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+ \
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+ /DISCARD/ : { \
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+ SYMTAB_DISCARD \
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+ SYMTAB_DISCARD_GPL \
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+ SYMTAB_DISCARD_STR \
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} \
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\
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/* __*init sections */ \
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--- a/include/linux/module.h
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+++ b/include/linux/module.h
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@@ -187,16 +187,24 @@ void *__symbol_get_gpl(const char *symbo
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#define __CRC_SYMBOL(sym, sec)
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#endif
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+#ifdef MODULE
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+#define __EXPORT_SUFFIX(sym)
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+#else
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+#define __EXPORT_SUFFIX(sym) "." #sym
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+#endif
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+
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/* For every exported symbol, place a struct in the __ksymtab section */
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#define __EXPORT_SYMBOL(sym, sec) \
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extern typeof(sym) sym; \
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__CRC_SYMBOL(sym, sec) \
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static const char __kstrtab_##sym[] \
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- __attribute__((section("__ksymtab_strings"), aligned(1))) \
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+ __attribute__((section("__ksymtab_strings" \
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+ __EXPORT_SUFFIX(sym)), aligned(1))) \
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= MODULE_SYMBOL_PREFIX #sym; \
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static const struct kernel_symbol __ksymtab_##sym \
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__used \
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- __attribute__((section("__ksymtab" sec), unused)) \
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+ __attribute__((section("__ksymtab" sec \
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+ __EXPORT_SUFFIX(sym)), unused)) \
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= { (unsigned long)&sym, __kstrtab_##sym }
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#define EXPORT_SYMBOL(sym) \
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--- a/Makefile
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+++ b/Makefile
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@@ -994,7 +994,7 @@ prepare: prepare0
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# Leave this as default for preprocessing vmlinux.lds.S, which is now
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# done in arch/$(ARCH)/kernel/Makefile
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-export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
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+export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) $(EXTRA_LDSFLAGS)
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# The asm symlink changes when $(ARCH) changes.
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# Detect this and ask user to run make mrproper
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--- a/arch/arm/kernel/vmlinux.lds.S
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+++ b/arch/arm/kernel/vmlinux.lds.S
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@@ -78,18 +78,6 @@ SECTIONS
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#endif
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}
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- /DISCARD/ : { /* Exit code and data */
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- EXIT_TEXT
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- EXIT_DATA
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- *(.exitcall.exit)
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- *(.ARM.exidx.exit.text)
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- *(.ARM.extab.exit.text)
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-#ifndef CONFIG_MMU
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- *(.fixup)
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- *(__ex_table)
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-#endif
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- }
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-
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.text : { /* Real text segment */
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_text = .; /* Text and read-only data */
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__exception_text_start = .;
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@@ -194,6 +182,20 @@ SECTIONS
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*(COMMON)
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_end = .;
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}
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+
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+ /DISCARD/ : { /* Exit code and data */
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+ EXIT_TEXT
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+ EXIT_DATA
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+ *(.discard)
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+ *(.exitcall.exit)
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+ *(.ARM.exidx.exit.text)
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+ *(.ARM.extab.exit.text)
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+#ifndef CONFIG_MMU
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+ *(.fixup)
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+ *(__ex_table)
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+#endif
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+ }
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+
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/* Stabs debugging sections. */
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.stab 0 : { *(.stab) }
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.stabstr 0 : { *(.stabstr) }
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--- a/arch/powerpc/kernel/vmlinux.lds.S
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+++ b/arch/powerpc/kernel/vmlinux.lds.S
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@@ -37,12 +37,6 @@ jiffies = jiffies_64 + 4;
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#endif
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SECTIONS
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{
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- /* Sections to be discarded. */
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- /DISCARD/ : {
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- *(.exitcall.exit)
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- EXIT_DATA
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- }
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-
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. = KERNELBASE;
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/*
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@@ -295,6 +289,12 @@ SECTIONS
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__bss_stop = .;
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}
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+ /* Sections to be discarded. */
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+ /DISCARD/ : {
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+ *(.exitcall.exit)
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+ EXIT_DATA
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+ }
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+
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. = ALIGN(PAGE_SIZE);
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_end = . ;
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PROVIDE32 (end = .);
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