On Tue, 22 Dec 2009, richard -rw- weinberger wrote:
> Adding the ALIGN(PAGE_SIZE) causes the segfault.
> But I cannot tell you why. :-(
OK, then the following patch should fix the regression by reverting that
unintentional change.
Someone should probably determine why the ALIGN causes a segfault, since
that is probably a bug, but I don't have time to do that investigation.
Richard, can you test that this patch fixes the issue for you?
(adding the UML maintainer and list to the thread).
-Tim Abbott
um: remove PAGE_SIZE alignment in linker script causing kernel segfault.
The linker script cleanup that I did in commit
5d150a97f9391f5bcd7ba0d59d7a11c3de3cea80 introduced an ALIGN(PAGE_SIZE)
when using INIT_TEXT_SECTION; this apparently causes the kernel to
segfault with CONFIG_STATIC_LINK=y.
I'm not certain why this would cause the kernel to segfault, but it seems
likely it is because previously it was the case that
__init_begin = _stext = _text = _sinittext
and with the extra ALIGN(PAGE_SIZE), _sinittext becomes different.
Signed-off-by: Tim Abbott <tabb...@ksplice.com>
Reported-by: richard -rw- weinberger <richard.weinber...@gmail.com>
Cc: Jeff Dike <jd...@addtoit.com>
Cc: user-mode-linux-devel@lists.sourceforge.net
---
arch/um/kernel/uml.lds.S | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/um/kernel/uml.lds.S b/arch/um/kernel/uml.lds.S
index e7a6cca..664f942 100644
--- a/arch/um/kernel/uml.lds.S
+++ b/arch/um/kernel/uml.lds.S
@@ -22,7 +22,7 @@ SECTIONS
_text = .;
_stext = .;
__init_begin = .;
- INIT_TEXT_SECTION(PAGE_SIZE)
+ INIT_TEXT_SECTION(0)
. = ALIGN(PAGE_SIZE);
.text :
--
1.6.5.7
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