From: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
Commit 09c20c032b0f753969ae778d9783d946f054d7fe upstream.
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@xxxxxxxxxxxxx>
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
scripts/mod/modpost.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 9d9c5b905b35..14e3f53ebf17 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -798,6 +798,7 @@ static int number_prefix(const char *sym)
* where the '1' can be any number including several digits.
* The $ syntax is for sections where ld append a dot number
* to make section name unique.
+ * "*foo*" will match a string that contains "foo"
*/
static int match(const char *sym, const char * const pat[])
{
@@ -806,8 +807,17 @@ 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;
}
--
2.9.0