Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 09c20c03 authored by Paul Gortmaker's avatar Paul Gortmaker Committed by Rusty Russell
Browse files

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: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent c5c3439a

scripts/mod/modpost.c

+11 −1
Original line number Diff line number Diff line
@@ -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;

		}