On Fri, May 17, 2013 at 05:43:41PM +0100, Will Deacon wrote:
> As is done for other architectures, sort the exception table at
> build-time rather than during boot.
>
> Since sortextable appears to be a standalone C program relying on the
> host elf.h to provide EM_AARCH64, I've had to add a conditional check in
> order to allow cross-compilation on machines that aren't running a
> bleeding-edge libc-dev.
>
> Signed-off-by: Will Deacon <will.dea...@arm.com>
> ---
> arch/arm64/Kconfig | 1 +
> arch/arm64/kernel/vmlinux.lds.S | 15 +++++++--------
> scripts/sortextable.c | 5 +++++
> 3 files changed, 13 insertions(+), 8 deletions(-)
>
> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 48347dc..fb8fd90 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -7,6 +7,7 @@ config ARM64
> select ARM_AMBA
> select ARM_ARCH_TIMER
> select ARM_GIC
> + select BUILDTIME_EXTABLE_SORT
> select CLONE_BACKWARDS
> select COMMON_CLK
> select GENERIC_CLOCKEVENTS
> diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
> index 3fae2be..3d527726 100644
> --- a/arch/arm64/kernel/vmlinux.lds.S
> +++ b/arch/arm64/kernel/vmlinux.lds.S
> @@ -57,6 +57,13 @@ SECTIONS
>
> RO_DATA(PAGE_SIZE)
>
> + . = ALIGN(8);
> + __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
> + __start___ex_table = .;
> + *(__ex_table)
> + __stop___ex_table = .;
> + }
Here you could use:
EXCEPTION_TABLE(align)
(From include/asm-generic/vmlinux.lds.h)
Sam
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