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objtool: Fix off-by-one in symbol_by_offset() 

Sometimes, WARN_FUNC() and other users of symbol_by_offset() will
associate the first instruction of a symbol with the symbol preceding
it.  This is because symbol->offset + symbol->len is already outside of
the symbol's range.

Fixes: 2a362ecc3e ("objtool: Optimize find_symbol_*() and read_symbols()")
Signed-off-by: Julien Thierry <jthierry@redhat.com>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
This commit is contained in:
Julien Thierry 2020-04-03 14:17:30 +01:00 committed by Peter Zijlstra
parent df2b384366
commit 7f9b34f36c
1 changed files with 1 additions and 1 deletions
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2
tools/objtool/elf.c
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@ -105,7 +105,7 @@ static int symbol_by_offset(const void *key, const struct rb_node *node)
if (*o < s->offset)
return -1;
if (*o > s->offset + s->len)
if (*o >= s->offset + s->len)
return 1;
return 0;