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10b4c4bce3
mirror_ubuntu-kernels/tools/objtool
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Josh Poimboeuf 10b4c4bce3 objtool: Fix UNWIND_HINT_{SAVE,RESTORE} across basic blocks 
If SAVE and RESTORE unwind hints are in different basic blocks, and
objtool sees the RESTORE before the SAVE, it errors out with:

  vmlinux.o: warning: objtool: vmw_port_hb_in+0x242: objtool isn't smart enough to handle this CFI save/restore combo

In such a case, defer following the RESTORE block until the
straight-line path gets followed later.

Fixes: 8faea26e61 ("objtool: Re-add UNWIND_HINT_{SAVE_RESTORE}")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202402240702.zJFNmahW-lkp@intel.com/
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://lore.kernel.org/r/20240227073527.avcm5naavbv3cj5s@treble
Signed-off-by: Kees Cook <keescook@chromium.org>
2024-02-29 22:34:42 -08:00
..
arch objtool: Use 'the fallthrough' pseudo-keyword 2023-10-03 21:37:35 +02:00
Documentation objtool: Move noreturn function list to separate file 2023-05-16 06:31:55 -07:00
include/objtool objtool/x86: Fix SRSO mess 2023-08-16 09:39:16 +02:00
.gitignore objtool: Install libsubcmd in build 2023-01-30 16:27:46 -08:00
Build objtool: Install libsubcmd in build 2023-01-30 16:27:46 -08:00
builtin-check.c objtool: Add verbose option for disassembling affected functions 2023-05-16 06:31:51 -07:00
check.c objtool: Fix UNWIND_HINT_{SAVE,RESTORE} across basic blocks 2024-02-29 22:34:42 -08:00
elf.c objtool: Remove max symbol name length limitation 2023-10-05 17:01:28 -07:00
Makefile objtool: Fix HOSTCC flag usage 2023-02-01 09:15:18 -08:00
noreturns.h fortify: Split reporting and avoid passing string pointer 2024-02-29 13:38:02 -08:00
objtool.c objtool: Propagate early errors 2023-10-05 17:01:11 -07:00
orc_dump.c x86,objtool: Split UNWIND_HINT_EMPTY in two 2023-03-23 23:18:58 +01:00
orc_gen.c objtool: Add elf_create_section_pair() 2023-06-07 10:03:17 -07:00
special.c objtool: Get rid of reloc->addend 2023-06-07 10:03:23 -07:00
sync-check.sh objtool: Add objtool_types.h 2023-03-23 23:18:56 +01:00
weak.c objtool: Ditch subcommands 2022-04-22 12:32:01 +02:00