linux.git/arch/um, branch v2.6.15

[PATCH] uml: fix compilation with CONFIG_MODE_TT disabled

2005-12-29T17:48:15+00:00

Fix UML compilation when SKAS mode is disabled. Indeed, we were compiling
SKAS-only object files, which failed due to some SKAS-only headers being
excluded from the search path.

Thanks to the bug report from Pekka J Enberg.

Acked-by: Pekka J Enberg 
Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Linus Torvalds

[PATCH] Hostfs: update for new glibc - add missing symbol exports

2005-12-29T17:48:15+00:00

Today, when compiling UML, I got warnings for two used unexported symbols:
readdir64 and truncate64. Indeed, my glibc headers are aliasing readdir to
readdir64 and truncate to truncate64 (and so on).

I'm then adding additional exports. Since I've no idea if the symbols where
always provided in the supported glibc's, I've added weak definitions too.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Linus Torvalds

[PATCH] uml: fix random segfaults at bootup

2005-12-29T17:48:15+00:00

Don't use printk() where "current_thread_info()" is crap.

Until when we switch to running on init_stack, current_thread_info() evaluates
to crap. Printk uses "current" at times (in detail, ¤t is evaluated with
CONFIG_DEBUG_SPINLOCK to check the spinlock owner task).

And this leads to random segmentation faults.

Exactly, what happens is that ¤t = *(current_thread_info()), i.e. round
down $esp and dereference the value. I.e. access the stack below $esp, which
causes SIGSEGV on a VM_GROWSDOWN vma (see arch/i386/mm/fault.c).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Linus Torvalds

[PATCH] uml skas0: stop gcc's insanity

2005-12-18T19:19:44+00:00

With Paolo 'Blaisorblade' Giarrusso 

UML skas0 stub has been miscompiling for many people (incidentally not
the authors), depending on the used GCC versions.

I think (and testing on some GCC versions shows) this patch avoids the
fundamental issue which is behind this, namely gcc using the stack when
we have just replaced it, behind gcc's back.  The remapping and storage
of the return value is hidden in a blob of asm, hopefully giving gcc no
room for creativity.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Linus Torvalds

[PATCH] uml - fix some funkiness in Kconfig

2005-12-18T19:19:44+00:00

So you may have seen the miniconfig stuff wander by, which means that my
build script exits if there's a .config error, and we have this:

  fs/Kconfig:1749:warning: 'select' used by config symbol 'CIFS_UPCALL'
	refer to undefined symbol 'CONNECTOR'

This makes it shut up.

Signed-off-by: Rob Landley 
[ Verified it makes sense. ]
Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Linus Torvalds

[PATCH] uml: fix dynamic linking on some 64-bit distros

2005-12-18T19:19:44+00:00

With Paolo 'Blaisorblade' Giarrusso 

The current UML build assumes that on x86-64 systems, /lib is a symlink
to /lib64, but in some distributions (like PLD and CentOS) they are
separate directories, so the 64 bit library loader isn't found.  This
patch inserts /lib64 at the start of the rpath on x86-64 UML builds.

Signed-off-by: Rob Landley 
Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Linus Torvalds

[PATCH] uml: arch/um/scripts/Makefile.rules - remove duplicated code

2005-12-18T19:19:44+00:00

Duplicated code - the patch adding it was probably applied twice without
enough care.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Linus Torvalds

[PATCH] uml: fix compile error for tt

2005-12-12T16:57:43+00:00

arch/um/kernel/tt/uaccess.c: In function `copy_from_user_tt':
arch/um/kernel/tt/uaccess.c:11: error: `FIXADDR_USER_START' undeclared (first use in this function)
arch/um/kernel/tt/uaccess.c:11: error: (Each undeclared identifier is reported only once
arch/um/kernel/tt/uaccess.c:11: error: for each function it appears in.)

I get the compile error when I disable CONFIG_MODE_SKAS.

Signed-off-by: Pekka Enberg 
Acked-by: Paolo Giarrusso 
Cc: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: eliminate use of libc PAGE_SIZE

2005-11-22T17:13:41+00:00

On some systems, libc PAGE_SIZE calls getpagesize, which can't happen from a
stub.  So, I use UM_KERN_PAGE_SIZE, which is less variable in its definition,
instead.

Signed-off-by: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: properly invoke x86_64 system calls

2005-11-22T17:13:41+00:00

This patch makes stub_segv use the stub_syscall macros.  This was needed
anyway, but the bug that prompted this was the discovery that gcc was storing
stuff in RCX, which is trashed across a system call.  This is exactly the sort
of problem that the new macros fix.

There is a stub_syscall0 for getpid.  stub_segv was changed to be a libc file,
and that caused some include changes.

Signed-off-by: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds