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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2018-10-31 21:57:30 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-06 19:05:28 +0200 |
| commit | a22c63764d09e7e0b22e110e407921daf35cdb8c (patch) | |
| tree | 554b70550fd3218c8fe78bb68bdbdff6ba20144a /tools | |
| parent | 321d6579dc7ba1170e1058c78a57461d4a65aacd (diff) | |
| download | linux-stable-a22c63764d09e7e0b22e110e407921daf35cdb8c.tar.gz linux-stable-a22c63764d09e7e0b22e110e407921daf35cdb8c.tar.bz2 linux-stable-a22c63764d09e7e0b22e110e407921daf35cdb8c.zip | |
objtool: Support GCC 9 cold subfunction naming scheme
commit bcb6fb5da77c2a228adf07cc9cb1a0c2aa2001c6 upstream.
Starting with GCC 8, a lot of unlikely code was moved out of line to
"cold" subfunctions in .text.unlikely.
For example, the unlikely bits of:
irq_do_set_affinity()
are moved out to the following subfunction:
irq_do_set_affinity.cold.49()
Starting with GCC 9, the numbered suffix has been removed. So in the
above example, the cold subfunction is instead:
irq_do_set_affinity.cold()
Tweak the objtool subfunction detection logic so that it detects both
GCC 8 and GCC 9 naming schemes.
Reported-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/015e9544b1f188d36a7f02fa31e9e95629aa5f50.1541040800.git.jpoimboe@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/objtool/elf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c index e6cef5a160e7..d089c711355a 100644 --- a/tools/objtool/elf.c +++ b/tools/objtool/elf.c @@ -305,7 +305,7 @@ static int read_symbols(struct elf *elf) if (sym->type != STT_FUNC) continue; sym->pfunc = sym->cfunc = sym; - coldstr = strstr(sym->name, ".cold."); + coldstr = strstr(sym->name, ".cold"); if (!coldstr) continue; |