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| author |   Josh Poimboeuf <jpoimboe@redhat.com> | 2019-03-06 11:07:24 -0600 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2019-03-06 20:36:32 +0100 |
| commit | f76a16adc485699f95bb71fce114f97c832fe664 (patch) | |
| tree | 92222ae219606d56fca11b5c44e34ca53219fc9b /include/asm-generic/vmlinux.lds.h | |
| parent | Merge tag 'y2038-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground (diff) | |
| download | linux-dev-f76a16adc485699f95bb71fce114f97c832fe664.tar.xz linux-dev-f76a16adc485699f95bb71fce114f97c832fe664.zip | |
x86/unwind/orc: Fix ORC unwind table alignment
The .orc_unwind section is a packed array of 6-byte structs. It's
currently aligned to 6 bytes, which is causing warnings in the LLD
linker.
Six isn't a power of two, so it's not a valid alignment value. The
actual alignment doesn't matter much because it's an array of packed
structs. An alignment of two is sufficient. In reality it always gets
aligned to four bytes because it comes immediately after the
4-byte-aligned .orc_unwind_ip section.
Fixes: ee9f8fce9964 ("x86/unwind: Add the ORC unwinder")
Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Reported-by: Dmitry Golovin <dima@golovin.in>
Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://github.com/ClangBuiltLinux/linux/issues/218
Link: https://lkml.kernel.org/r/d55027ee95fe73e952dcd8be90aebd31b0095c45.1551892041.git.jpoimboe@redhat.com
Diffstat (limited to 'include/asm-generic/vmlinux.lds.h')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 3d7a6a9c2370..f8f6f04c4453 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -733,7 +733,7 @@ KEEP(*(.orc_unwind_ip)) \ __stop_orc_unwind_ip = .; \ } \ - . = ALIGN(6); \ + . = ALIGN(2); \ .orc_unwind : AT(ADDR(.orc_unwind) - LOAD_OFFSET) { \ __start_orc_unwind = .; \ KEEP(*(.orc_unwind)) \ |