[Xen-changelog] [xen master] x86: move both exception tables into .rodata

[patchbot@xxxxxxx]

commit 79713ed0a94cb5fa01b994645a31c4960a6c483e
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Tue Mar 15 12:21:38 2016 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue Mar 15 12:21:38 2016 +0100

    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 <jbeulich@xxxxxxxx>
    Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 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 5cb9741..961f48f 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 = .;
--
generated by git-patchbot for /home/xen/git/xen.git#master

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