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authorPaul Gortmaker <paul.gortmaker@windriver.com>2015-04-20 10:20:26 +0930
committerRusty Russell <rusty@rustcorp.com.au>2015-04-22 17:31:33 +0930
commit09c20c032b0f753969ae778d9783d946f054d7fe (patch)
tree709242ebbec9d6e8a49136161ab97204d40ce6e3
parentc5c3439af0f9c08e253d2a703a7eb3deba7d8591 (diff)
downloadlinux-linaro-stable-09c20c032b0f753969ae778d9783d946f054d7fe.tar.gz
modpost: expand pattern matching to support substring matches
Currently the match() function supports a leading * to match any prefix and a trailing * to match any suffix. However there currently is not a combination of both that can be used to target matches of whole families of functions that share a common substring. Here we expand the *foo and foo* match to also support *foo* with the goal of targeting compiler generated symbol names that contain strings like ".constprop." and ".isra." Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
-rw-r--r--scripts/mod/modpost.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 45e4027d3193..1c2101bf63d2 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -776,6 +776,7 @@ static const char *sech_name(struct elf_info *elf, Elf_Shdr *sechdr)
* "foo" will match an exact string equal to "foo"
* "*foo" will match a string that ends with "foo"
* "foo*" will match a string that begins with "foo"
+ * "*foo*" will match a string that contains "foo"
*/
static int match(const char *sym, const char * const pat[])
{
@@ -784,8 +785,17 @@ static int match(const char *sym, const char * const pat[])
p = *pat++;
const char *endp = p + strlen(p) - 1;
+ /* "*foo*" */
+ if (*p == '*' && *endp == '*') {
+ char *here, *bare = strndup(p + 1, strlen(p) - 2);
+
+ here = strstr(sym, bare);
+ free(bare);
+ if (here != NULL)
+ return 1;
+ }
/* "*foo" */
- if (*p == '*') {
+ else if (*p == '*') {
if (strrcmp(sym, p + 1) == 0)
return 1;
}