linux/tools/objtool
Peter Zijlstra 0f1441b44e objtool: Fix noinstr vs KCOV
Since many compilers cannot disable KCOV with a function attribute,
help it to NOP out any __sanitizer_cov_*() calls injected in noinstr
code.

This turns:

12:   e8 00 00 00 00          callq  17 <lockdep_hardirqs_on+0x17>
		13: R_X86_64_PLT32      __sanitizer_cov_trace_pc-0x4

into:

12:   0f 1f 44 00 00          nopl   0x0(%rax,%rax,1)
		13: R_X86_64_NONE      __sanitizer_cov_trace_pc-0x4

Just like recordmcount does.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
2020-06-18 17:36:33 +02:00
..
arch/x86 objtool: Fix noinstr vs KCOV 2020-06-18 17:36:33 +02:00
Documentation objtool: Add support for intra-function calls 2020-04-30 20:14:33 +02:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
arch.h objtool: Fix noinstr vs KCOV 2020-06-18 17:36:33 +02:00
Build objtool: Enable compilation of objtool for all architectures 2020-05-20 09:17:28 -05:00
builtin-check.c objtool: Enable compilation of objtool for all architectures 2020-05-20 09:17:28 -05:00
builtin-orc.c objtool: Enable compilation of objtool for all architectures 2020-05-20 09:17:28 -05:00
builtin.h objtool: Implement noinstr validation 2020-04-22 10:53:50 +02:00
cfi.h objtool: Fix !CFI insn_state propagation 2020-04-22 10:53:50 +02:00
check.c objtool: Fix noinstr vs KCOV 2020-06-18 17:36:33 +02:00
check.h objtool: Enable compilation of objtool for all architectures 2020-05-20 09:17:28 -05:00
elf.c objtool: Provide elf_write_{insn,reloc}() 2020-06-18 17:36:33 +02:00
elf.h objtool: Provide elf_write_{insn,reloc}() 2020-06-18 17:36:33 +02:00
Makefile objtool: Enable compilation of objtool for all architectures 2020-05-20 09:17:28 -05:00
objtool.c objtool: Exit successfully when requesting help 2020-05-20 08:32:52 -05:00
objtool.h objtool: Enable compilation of objtool for all architectures 2020-05-20 09:17:28 -05:00
orc_dump.c objtool: Enable compilation of objtool for all architectures 2020-05-20 09:17:28 -05:00
orc_gen.c objtool: Clean up elf_write() condition 2020-06-18 17:36:33 +02:00
special.c objtool: Optimize read_sections() 2020-03-25 18:28:30 +01:00
special.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
sync-check.sh objtool: Silence build output 2020-01-22 07:54:34 +01:00
warn.h objtool: Rename find_containing_func() 2020-03-25 18:28:29 +01:00
weak.c objtool: Enable compilation of objtool for all architectures 2020-05-20 09:17:28 -05:00