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authorJan Beulich <jbeulich@novell.com>2008-12-16 11:30:08 +0000
committerSam Ravnborg <sam@ravnborg.org>2008-12-19 22:47:10 +0100
commit9bb482476c6c9d1ae033306440c51ceac93ea80c (patch)
treeb5e415eee46b66d9cc39e31d29d0d02994321d11 /kernel
parentad7a953c522ceb496611d127e51e278bfe0ff483 (diff)
allow stripping of generated symbols under CONFIG_KALLSYMS_ALL
Building upon parts of the module stripping patch, this patch introduces similar stripping for vmlinux when CONFIG_KALLSYMS_ALL=y. Using CONFIG_KALLSYMS_STRIP_GENERATED reduces the overhead of CONFIG_KALLSYMS_ALL from 245k/310k to 65k/80k for the (i386/x86-64) kernels I tested with. The patch also does away with the need to special case the kallsyms- internal symbols by making them available even in the first linking stage. While it is a generated file, the patch includes the changes to scripts/genksyms/keywords.c_shipped, as I'm unsure what the procedure here is. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/kallsyms.c16
1 files changed, 6 insertions, 10 deletions
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 7b8b0f21a5b1..e694afa0eb8c 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -30,20 +30,19 @@
#define all_var 0
#endif
-/* These will be re-linked against their real values during the second link stage */
-extern const unsigned long kallsyms_addresses[] __attribute__((weak));
-extern const u8 kallsyms_names[] __attribute__((weak));
+extern const unsigned long kallsyms_addresses[];
+extern const u8 kallsyms_names[];
/* tell the compiler that the count isn't in the small data section if the arch
* has one (eg: FRV)
*/
extern const unsigned long kallsyms_num_syms
-__attribute__((weak, section(".rodata")));
+ __attribute__((__section__(".rodata")));
-extern const u8 kallsyms_token_table[] __attribute__((weak));
-extern const u16 kallsyms_token_index[] __attribute__((weak));
+extern const u8 kallsyms_token_table[];
+extern const u16 kallsyms_token_index[];
-extern const unsigned long kallsyms_markers[] __attribute__((weak));
+extern const unsigned long kallsyms_markers[];
static inline int is_kernel_inittext(unsigned long addr)
{
@@ -168,9 +167,6 @@ static unsigned long get_symbol_pos(unsigned long addr,
unsigned long symbol_start = 0, symbol_end = 0;
unsigned long i, low, high, mid;
- /* This kernel should never had been booted. */
- BUG_ON(!kallsyms_addresses);
-
/* do a binary search on the sorted kallsyms_addresses array */
low = 0;
high = kallsyms_num_syms;