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[PATCH] x86/build: Move exception tables into __ro_after_init
- To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Mon, 6 Dec 2021 13:07:25 +0000
- Authentication-results: esa2.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none
- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Mon, 06 Dec 2021 13:08:01 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
It turns out that we've always been abusing the fact that .rodata is
read/write during early boot, so we can sort the two tables.
Now that we have a real __ro_after_init concept, reposition them to better
match reality.
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Wei Liu <wl@xxxxxxx>
---
xen/arch/x86/xen.lds.S | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
diff --git a/xen/arch/x86/xen.lds.S b/xen/arch/x86/xen.lds.S
index 4db5b404e073..ca22e984f807 100644
--- a/xen/arch/x86/xen.lds.S
+++ b/xen/arch/x86/xen.lds.S
@@ -100,6 +100,18 @@ SECTIONS
__ro_after_init_start = .;
*(.data.ro_after_init)
+
+ . = 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 = .;
+
. = ALIGN(PAGE_SIZE);
__ro_after_init_end = .;
@@ -129,17 +141,6 @@ SECTIONS
*(.note.gnu.build-id)
__note_gnu_build_id_end = .;
#endif
- . = 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 CONFIG_HAS_VPCI
. = ALIGN(POINTER_ALIGN);
__start_vpci_array = .;
--
2.11.0
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