Messages in this thread | | | Date | Fri, 26 Aug 2022 11:10:32 -0700 | Subject | [PATCH 0/3] fix debug info for asm and DEBUG_INFO_SPLIT | From | Nick Desaulniers <> |
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Alexey reported that the fraction of unknown filename instances in kallsyms grew from ~0.3% to ~10% recently; Bill and Greg tracked it down to assembler defined symbols, which regressed as a result of:
commit b8a9092330da ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1")
In that commit, I allude to restoring debug info for assembler defined symbols in a follow up patch, but it seems I forgot to do so in
commit a66049e2cf0e ("Kbuild: make DWARF version a choice")
Do so requires a fixup for as-option, which seems to be failing when used in scripts/Makefile.debug.
Also includes a fix for DEBUG_INFO_SPLIT while I'm here. Dmitrii reports that this has been broken since gcc-11+ & clang-12+. I'm guessing no one uses this .config option...since no one else has reported it being broken yet...
Nick Desaulniers (3): Makefile.compiler: s/KBUILD_CFLAGS/KBUILD_AFLAGS/ for as-option Makefile.debug: re-enable debug info for .S files Makefile.debug: set -g unconditional on CONFIG_DEBUG_INFO_SPLIT
arch/x86/boot/compressed/Makefile | 5 +++-- scripts/Makefile.compiler | 6 +++--- scripts/Makefile.debug | 26 +++++++++++++++++++------- 3 files changed, 25 insertions(+), 12 deletions(-)
-- 2.37.2.672.g94769d06f0-goog
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