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| author | Petr Pavlu <petr.pavlu@suse.com> | 2026-06-12 15:38:28 +0200 |
|---|---|---|
| committer | Petr Pavlu <petr.pavlu@suse.com> | 2026-08-06 13:29:02 +0200 |
| commit | a347812c2ef0fafef587d2580be145d8101a0137 (patch) | |
| tree | af9bfb4cb3ae617e9fe0aa9d507773904e1bb0cb /scripts | |
| parent | a3126c746ddfe1cc3f6eee70475a33906e173ece (diff) | |
| download | linux-stable-a347812c2ef0fafef587d2580be145d8101a0137.tar.gz linux-stable-a347812c2ef0fafef587d2580be145d8101a0137.zip | |
module: Remove unused DISCARD_EH_FRAME definition from module.lds.S
The linker script scripts/module.lds.S contains an unused DISCARD_EH_FRAME
definition introduced by commit 68c76ad4a957 ("arm64: unwind: add
asynchronous unwind tables to kernel and modules").
As shown in an earlier version of that patch [1], DISCARD_EH_FRAME was
meant to be used by SANITIZER_DISCARDS in the same file, as follows:
-# define SANITIZER_DISCARDS *(.eh_frame)
+# define SANITIZER_DISCARDS DISCARD_EH_FRAME
However, in the meantime, SANITIZER_DISCARDS was removed entirely from
module.lds.S by commit 89245600941e ("cfi: Switch to -fsanitize=kcfi").
Eventually, the mentioned commit 68c76ad4a957 only added the new
DISCARD_EH_FRAME definition to this file without actually using it.
The file include/asm-generic/vmlinux.lds.h contains a similar
DISCARD_EH_FRAME definition for vmlinux to discard .eh_frame sections that
may be present when CONFIG_GCOV_KERNEL, CONFIG_KASAN_GENERIC or
CONFIG_KCSAN is enabled. Testing these options on arm64 with LLVM 19.1 did
not show any unexpected .eh_frame sections in modules.
Remove the unused DISCARD_EH_FRAME definition from scripts/module.lds.S.
Link: https://lore.kernel.org/linux-arm-kernel/20220701152724.3343599-2-ardb@kernel.org/ [1]
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Petr Pavlu <petr.pavlu@suse.com>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/module.lds.S | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/scripts/module.lds.S b/scripts/module.lds.S index b62683061d79..d0f200428957 100644 --- a/scripts/module.lds.S +++ b/scripts/module.lds.S @@ -3,11 +3,6 @@ * Archs are free to supply their own linker scripts. ld will * combine them automatically. */ -#ifdef CONFIG_UNWIND_TABLES -#define DISCARD_EH_FRAME -#else -#define DISCARD_EH_FRAME *(.eh_frame) -#endif #include <asm-generic/codetag.lds.h> |