linux-kernel - [PATCHv3 3/9] kallsyms: exclude pseudo symbols for __init / _

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Message-Id: <1408623792-7973-4-git-send-email-minipli@googlemail.com>
Date:	Thu, 21 Aug 2014 14:23:06 +0200
From:	Mathias Krause <minipli@...glemail.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	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>,
	linux-kernel@...r.kernel.org,
	Mathias Krause <minipli@...glemail.com>
Subject: [PATCHv3 3/9] 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

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