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| author | Nick Desaulniers <ndesaulniers@google.com> | 2022-10-24 23:34:14 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-11-03 17:52:27 +0300 |
| commit | b442ad833037a9b6528d6c6a950aea9f2032338b (patch) | |
| tree | 8c263ffd850e375584dc2033a63b363bd7e25331 /Makefile | |
| parent | e0eaf41b1dcb24ac96de8c1dcc3053ee49f05a02 (diff) | |
| download | linux-b442ad833037a9b6528d6c6a950aea9f2032338b.tar.xz | |
Makefile.debug: re-enable debug info for .S files
This is _not_ an upstream commit and just for 4.19.y only. It is based
on commit 32ef9e5054ec0321b9336058c58ec749e9c6b0fe upstream.
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")
Fixes: b8a9092330da ("Kbuild: do not emit debug info for assembly with LLVM_IAS=1")
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 4 |
1 files changed, 3 insertions, 1 deletions
@@ -744,7 +744,9 @@ KBUILD_CFLAGS += $(call cc-option, -gsplit-dwarf, -g) else KBUILD_CFLAGS += -g endif -ifneq ($(LLVM_IAS),1) +ifeq ($(LLVM_IAS),1) +KBUILD_AFLAGS += -g +else KBUILD_AFLAGS += -Wa,-gdwarf-2 endif endif |