From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: chrisw@sous-sol.org, virtualization@lists.osdl.org,
Andrew Morton <akpm@linux-foundation.org>,
xen-devel@lists.xensource.com, jeremy@xensource.com
Subject: [PATCH] Xen i386 xen-head.S fix sections mixup (updated)
Date: Mon, 20 Aug 2007 13:19:12 -0400 [thread overview]
Message-ID: <20070820171912.GB9478@Krystal> (raw)
In-Reply-To: <46C9311D.2030702@goop.org>
Xen i386 xen-head.S fix sections mixup
xen-head.S does not come back to the data section, leaving the text section
as current section. It causes problems with a slightly enhanced DEBUG_RODATA
that supports CONFIG_HOTPLUG and bringing a CPU up after the text has been
marked read-only: reference to early_gdt_descr causes a page fault.
Update:
It should be using pushsection/popsection.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: jeremy@xensource.com
CC: chrisw@sous-sol.org
CC: virtualization@lists.osdl.org
CC: xen-devel@lists.xensource.com
---
arch/i386/xen/xen-head.S | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
Index: linux-2.6-lttng/arch/i386/xen/xen-head.S
===================================================================
--- linux-2.6-lttng.orig/arch/i386/xen/xen-head.S 2007-08-20 00:22:16.000000000 -0400
+++ linux-2.6-lttng/arch/i386/xen/xen-head.S 2007-08-20 13:02:38.000000000 -0400
@@ -7,20 +7,21 @@
#include <asm/boot.h>
#include <xen/interface/elfnote.h>
- .section .init.text
+.pushsection .init.text
ENTRY(startup_xen)
movl %esi,xen_start_info
cld
movl $(init_thread_union+THREAD_SIZE),%esp
jmp xen_start_kernel
+.popsection
-.pushsection ".bss.page_aligned"
+.pushsection .bss.page_aligned
.align PAGE_SIZE_asm
ENTRY(hypercall_page)
.skip 0x1000
.popsection
- .section .text
+.pushsection .text
ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz "linux")
ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz "2.6")
ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz "xen-3.0")
@@ -34,5 +35,6 @@ ENTRY(hypercall_page)
ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "no")
#endif
ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic")
+.popsection
#endif /*CONFIG_XEN */
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
next prev parent reply other threads:[~2007-08-20 17:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-20 3:04 [PATCH] Xen i386 xen-head.S fix sections mixup Mathieu Desnoyers
2007-08-20 6:13 ` Jeremy Fitzhardinge
2007-08-20 17:19 ` Mathieu Desnoyers [this message]
2007-08-20 17:34 ` [PATCH] Xen i386 xen-head.S fix sections mixup (updated) Jeremy Fitzhardinge
2007-08-20 19:04 ` [PATCH] Xen i386 xen-head.S fix sections mixup (update 2) Mathieu Desnoyers
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