Commit 2e3a10a1 authored Jul 27, 2014 by Russell King Committed by Rusty Russell Jul 27, 2014

ARM: avoid ARM binutils leaking ELF local symbols



Symbols starting with .L are ELF local symbols and should not appear
in ELF symbol tables.  However, unfortunately ARM binutils leaks the
.LANCHOR symbols into the symbol table, which leads kallsyms to report
these symbols rather than the real name.  It is not very useful when
%pf reports symbols against these leaked .LANCHOR symbols.

Arrange for kallsyms to ignore these symbols using the same mechanism
that is used for the ARM mapping symbols.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

parent a0d8f803

kernel/module.c

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -3385,6 +3385,8 @@ static inline int within(unsigned long addr, void *start, unsigned long size)
	*/		*/
	static inline int is_arm_mapping_symbol(const char *str)		static inline int is_arm_mapping_symbol(const char *str)
	{		{
			if (str[0] == '.' && str[1] == 'L')
			return true;
	return str[0] == '$' && strchr("atd", str[1])		return str[0] == '$' && strchr("atd", str[1])
	&& (str[2] == '\0' \|\| str[2] == '.');		&& (str[2] == '\0' \|\| str[2] == '.');
	}		}

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