arm64: extable: sort the exception table at build time
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.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 56b3f6d..c3e3a17 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -7,6 +7,7 @@
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..5e06a17 100644
--- a/arch/arm64/kernel/vmlinux.lds.S
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -56,7 +56,7 @@
}
RO_DATA(PAGE_SIZE)
-
+ EXCEPTION_TABLE(8)
_etext = .; /* End of text and rodata section */
. = ALIGN(PAGE_SIZE);
@@ -99,14 +99,6 @@
READ_MOSTLY_DATA(64)
/*
- * The exception fixup table (might need resorting at runtime)
- */
- . = ALIGN(32);
- __start___ex_table = .;
- *(__ex_table)
- __stop___ex_table = .;
-
- /*
* and the usual data section
*/
DATA_DATA