linux-kernel - [PATCH v2 8/8] kallsyms: exclude pseudo symbols for __init / _

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 12 Jul 2014 16:43:32 +0200
From:	Mathias Krause <minipli@...glemail.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	Joe Perches <joe@...ches.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Mathias Krause <minipli@...glemail.com>
Subject: [PATCH v2 8/8] kallsyms: exclude pseudo symbols for __init / __exit strings

The __init_str() / __exit_str() annotations create pseudo symbols.
Ignore them, they have no value for us.

Signed-off-by: Mathias Krause <minipli@...glemail.com>
---
 scripts/kallsyms.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index dc7aa45e80..8fd0f2965d 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -88,6 +88,16 @@ static inline int is_arm_mapping_symbol(const char *str)
 	       && (str[2] == '\0' || str[2] == '.');
 }
 
+/*
+ * This ignores the pseudo symbols for __init_str() / __exit_str() annotated
+ * strings.
+ */
+static inline int is_init_exit_str_symbol(const char *str)
+{
+	return strncmp(str, "__UNIQUE_ID__init_str_", 22) == 0 ||
+	       strncmp(str, "__UNIQUE_ID__exit_str_", 22) == 0;
+}
+
 static int check_symbol_range(const char *sym, unsigned long long addr,
 			      struct addr_range *ranges, int entries)
 {
@@ -158,6 +168,9 @@ static int read_symbol(FILE *in, struct sym_entry *s)
 	/* exclude debugging symbols */
 	else if (stype == 'N')
 		return -1;
+	/* exclude pseudo symbols for __init / __exit strings */
+	else if (stype == 't' && is_init_exit_str_symbol(sym))
+		return -1;
 
 	/* include the type field in the symbol name, so that it gets
 	 * compressed together */
-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/