From adace89562c7a9645b8dc84f6e1ac7ba8756094e Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Wed, 8 May 2013 17:29:24 +0100 Subject: [PATCH] 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 Signed-off-by: Catalin Marinas --- arch/arm64/Kconfig | 1 + arch/arm64/kernel/vmlinux.lds.S | 10 +--------- scripts/sortextable.c | 5 +++++ 3 files changed, 7 insertions(+), 9 deletions(-) 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 @@ 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..5e06a17 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 1f10e89..f9ce116 100644 --- a/scripts/sortextable.c +++ b/scripts/sortextable.c @@ -31,6 +31,10 @@ #include #include +#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 */ -- 2.7.4