From 79713ed0a94cb5fa01b994645a31c4960a6c483e Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Tue, 15 Mar 2016 12:21:38 +0100 Subject: [PATCH] x86: move both exception tables into .rodata While they are being written during early boot (when sorting them), that writing takes place before we actually start fiddling with page table permissions, so these tables can benefit from getting write protected just like ordinary r/o data does (for now only when using 2M mappings). Signed-off-by: Jan Beulich Reviewed-by: Andrew Cooper --- xen/arch/x86/xen.lds.S | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) diff --git a/xen/arch/x86/xen.lds.S b/xen/arch/x86/xen.lds.S index 5cb9741636..961f48f780 100644 --- a/xen/arch/x86/xen.lds.S +++ b/xen/arch/x86/xen.lds.S @@ -76,6 +76,17 @@ SECTIONS *(.rodata) *(.rodata.*) + . = ALIGN(8); + /* Exception table */ + __start___ex_table = .; + *(.ex_table) + __stop___ex_table = .; + + /* Pre-exception table */ + __start___pre_ex_table = .; + *(.ex_table.pre) + __stop___pre_ex_table = .; + #ifdef LOCK_PROFILE . = ALIGN(POINTER_ALIGN); __lock_profile_start = .; @@ -162,16 +173,6 @@ SECTIONS __2M_rwdata_start = .; /* Start of 2M superpages, mapped RW. */ . = ALIGN(SMP_CACHE_BYTES); .data.read_mostly : { - /* Exception table */ - __start___ex_table = .; - *(.ex_table) - __stop___ex_table = .; - - /* Pre-exception table */ - __start___pre_ex_table = .; - *(.ex_table.pre) - __stop___pre_ex_table = .; - *(.data.read_mostly) . = ALIGN(8); __start_schedulers_array = .; -- 2.30.2