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authorJosh Poimboeuf <jpoimboe@redhat.com>2018-10-31 21:57:30 -0500
committerThomas Gleixner <tglx@linutronix.de>2018-11-01 09:55:38 +0100
commitbcb6fb5da77c2a228adf07cc9cb1a0c2aa2001c6 (patch)
treec7e4dc982c044c5758ec2e2f25ade68fb64e9d67 /tools
parent5b7449810ae6d652629c550d3974c8453836d229 (diff)
objtool: Support GCC 9 cold subfunction naming scheme
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
Diffstat (limited to 'tools')
-rw-r--r--tools/objtool/elf.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c
index 7ec85d567598..f8cef271dfc7 100644
--- a/tools/objtool/elf.c
+++ b/tools/objtool/elf.c
@@ -301,7 +301,7 @@ 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;