Hi Josh, In randconfig tests with gcc-8.1, I get this warning every few hundred builds, tried it on both next/master and 4.19.y-stable:
kernel/trace/trace_selftest_dynamic.o: warning: objtool:
trace_selftest_dynamic_test_func()+0x5: call without frame pointer
save/setup
kernel/trace/trace_selftest_dynamic.o: warning: objtool:
trace_selftest_dynamic_test_func2()+0x5: call without frame pointer
save/setup
$ objdump -dr
build/x86/0x90C84554_defconfig/kernel/trace/trace_selftest_dynamic.o
build/x86/0x90C84554_defconfig/kernel/trace/trace_selftest_dynamic.o:
file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <trace_selftest_dynamic_test_func>:
0: e8 00 00 00 00 callq 5
<trace_selftest_dynamic_test_func+0x5>
1: R_X86_64_PC32 __fentry__-0x4
5: e8 00 00 00 00 callq a
<trace_selftest_dynamic_test_func+0xa>
6: R_X86_64_PC32 __sanitizer_cov_trace_pc-0x4
a: 31 c0 xor %eax,%eax
c: c3 retq
d: 0f 1f 00 nopl (%rax)
0000000000000010 <trace_selftest_dynamic_test_func2>:
10: e8 00 00 00 00 callq 15
<trace_selftest_dynamic_test_func2+0x5>
11: R_X86_64_PC32 __fentry__-0x4
15: e8 00 00 00 00 callq 1a
<trace_selftest_dynamic_test_func2+0xa>
16: R_X86_64_PC32 __sanitizer_cov_trace_pc-0x4
1a: 31 c0 xor %eax,%eax
1c: c3 retq
I found this reported in
http://kisskb.ellerman.id.au/kisskb/buildresult/13499139/, but could
not find an existing fix or analysis.
Arnd
.config.gz
Description: application/gzip
