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>

1 files changed, 1 insertions, 9 deletions

diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
index 3fae2be8b016..5e06a1786e26 100644
--- a/arch/arm64/kernel/vmlinux.lds.S
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -56,7 +56,7 @@ SECTIONS
         }
 
         RO_DATA(PAGE_SIZE)
-
+        EXCEPTION_TABLE(8)
         _etext = .;                     /* End of text and rodata section */
 
         . = ALIGN(PAGE_SIZE);
@@ -99,14 +99,6 @@ SECTIONS
                 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