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Message-ID: <2d406c4a-8a37-fe1a-acd5-0e2758e234b2@yahoo.com>
Date: Tue, 15 Jan 2019 13:59:52 -0500
From: Ruslan Nikolaev <nruslan_devel@...oo.com>
To: kernel-hardening@...ts.openwall.com
Cc: thgarnie@...gle.com, x86@...nel.org, kstewart@...uxfoundation.org,
gregkh@...uxfoundation.org, keescook@...omium.org
Subject: [PATCH v1 03/06]: Export individual Xen hypercalls
Export individual Xen hypercalls
The patch is by Hassan Nadeem and Ruslan Nikolaev. This extends
the prior PIE kernel patch (by Thomas Garnier) to also support
position-independent modules that can be placed anywhere in the
48/64-bit address space (for better KASLR).
Signed-off-by: Ruslan Nikolaev <nruslan_devel@...oo.com>
---
xen-head.S | 2 ++
1 file changed, 2 insertions(+)
diff -uprN a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
--- a/arch/x86/xen/xen-head.S 2019-01-15 11:20:45.279168462 -0500
+++ b/arch/x86/xen/xen-head.S 2019-01-15 11:28:54.676189964 -0500
@@ -13,6 +13,7 @@
#include <asm/page_types.h>
#include <asm/percpu.h>
#include <asm/unwind_hints.h>
+#include <asm/export.h>
#include <xen/interface/elfnote.h>
#include <xen/interface/features.h>
@@ -66,6 +67,7 @@ ENTRY(hypercall_page)
.endr
#define HYPERCALL(n) \
+ EXPORT_SYMBOL_GPL(xen_hypercall_##n); \
.equ xen_hypercall_##n, hypercall_page + __HYPERVISOR_##n * 32; \
.type xen_hypercall_##n, @function; .size xen_hypercall_##n, 32
#include <asm/xen-hypercalls.h>
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