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Re: [Xen-devel] [PATCH 1/4] xz: use initconst for hypervisor build
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Wed, 19 Jun 2019 12:09:04 +0100
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Tim Deegan <tim@xxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>
- Delivery-date: Wed, 19 Jun 2019 11:09:19 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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On 19/06/2019 12:02, Roger Pau Monne wrote:
> Or else clang adds a .init.rodata.cst8 section to the resulting object
> file, which is not handled by the Xen linker script and can end up
> before the text section which contains the headers, thus resulting in
> a not usable binary.
>
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
I think Clang is actually adding a .rodata.cst8 section, and the bulk
objcopy turns it into .init.rodata.cst8.
This is a good change so Reviewed-by: Andrew Cooper
<andrew.cooper3@xxxxxxxxxx> (subject to some clarity over the exact
section), but I also think this is needed as well:
diff --git a/xen/arch/x86/xen.lds.S b/xen/arch/x86/xen.lds.S
index cb42dc8..4f23059 100644
--- a/xen/arch/x86/xen.lds.S
+++ b/xen/arch/x86/xen.lds.S
@@ -206,8 +206,7 @@ SECTIONS
#endif
*(.init.rodata)
- *(.init.rodata.rel)
- *(.init.rodata.str*)
+ *(.init.rodata.*)
. = ALIGN(POINTER_ALIGN);
__setup_start = .;
@@ -221,8 +220,7 @@ SECTIONS
__initcall_end = .;
*(.init.data)
- *(.init.data.rel)
- *(.init.data.rel.*)
+ *(.init.data.*)
. = ALIGN(4);
__trampoline_rel_start = .;
*(.trampoline_rel)
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