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authorWill Deacon <will.deacon@arm.com>2013-05-08 20:29:24 +0400
committerCatalin Marinas <catalin.marinas@arm.com>2013-06-12 14:23:01 +0400
commitadace89562c7a9645b8dc84f6e1ac7ba8756094e (patch)
tree8a2cef419d80b54769da7cf5853ff4292f9e8237
parent73150c983ac1f9b7653cfd3823b1ad4a44aad3bf (diff)
downloadlinux-adace89562c7a9645b8dc84f6e1ac7ba8756094e.tar.xz
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>
-rw-r--r--arch/arm64/Kconfig1
-rw-r--r--arch/arm64/kernel/vmlinux.lds.S10
-rw-r--r--scripts/sortextable.c5
3 files changed, 7 insertions, 9 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 56b3f6d447ae..c3e3a17215a0 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 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
diff --git a/scripts/sortextable.c b/scripts/sortextable.c
index 1f10e89d15b4..f9ce1160419b 100644
--- a/scripts/sortextable.c
+++ b/scripts/sortextable.c
@@ -31,6 +31,10 @@
#include <tools/be_byteshift.h>
#include <tools/le_byteshift.h>
+#ifndef EM_AARCH64
+#define EM_AARCH64 183
+#endif
+
static int fd_map; /* File descriptor for file being modified. */
static int mmap_failed; /* Boolean flag. */
static void *ehdr_curr; /* current ElfXX_Ehdr * for resource cleanup */
@@ -249,6 +253,7 @@ do_file(char const *const fname)
custom_sort = sort_relative_table;
break;
case EM_ARM:
+ case EM_AARCH64:
case EM_MIPS:
break;
} /* end switch */