GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

allow stripping of generated symbols under CONFIG_KALLSYMS_ALL

Browse source 
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>
This commit is contained in:
Jan Beulich 2008-12-16 11:30:08 +00:00 • committed by Sam Ravnborg
parent ad7a953c52
commit 9bb482476c
7 changed files with 176 additions and 149 deletions
Download patch file Download diff file Expand all files Collapse all files

21
scripts/kallsyms.c
View file

@ -130,18 +130,9 @@ static int read_symbol(FILE *in, struct sym_entry *s)
static int symbol_valid(struct sym_entry *s)
{
/* Symbols which vary between passes. Passes 1 and 2 must have
* identical symbol lists. The kallsyms_* symbols below are only added
* after pass 1, they would be included in pass 2 when --all-symbols is
* specified so exclude them to get a stable symbol list.
* identical symbol lists.
*/
static char *special_symbols[] = {
"kallsyms_addresses",
"kallsyms_num_syms",
"kallsyms_names",
"kallsyms_markers",
"kallsyms_token_table",
"kallsyms_token_index",
/* Exclude linker generated symbols which vary between passes */
"_SDA_BASE_", /* ppc */
"_SDA2_BASE_", /* ppc */
@ -173,7 +164,9 @@ static int symbol_valid(struct sym_entry *s)
}
/* Exclude symbols which vary between passes. */
if (strstr((char *)s->sym + offset, "_compiled."))
if (strstr((char *)s->sym + offset, "_compiled.") ||
strncmp((char*)s->sym + offset, "__compound_literal.", 19) == 0 ||
strncmp((char*)s->sym + offset, "__compound_literal$", 19) == 0)
return 0;
for (i = 0; special_symbols[i]; i++)
@ -550,8 +543,10 @@ int main(int argc, char **argv)
usage();
read_map(stdin);
sort_symbols();
optimize_token_table();
if (table_cnt) {
sort_symbols();
optimize_token_table();
}
write_src();
return 0;