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ARM: avoid ARM binutils leaking ELF local symbols

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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>
This commit is contained in:
Russell King 2014-07-27 07:29:01 +09:30 committed by Rusty Russell
parent a0d8f80374
commit 2e3a10a155
1 changed files with 2 additions and 0 deletions
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2
kernel/module.c
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@ -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)
{
if (str[0] == '.' && str[1] == 'L')
return true;
return str[0] == '$' && strchr("atd", str[1])
&& (str[2] == '\0' || str[2] == '.');
}