linux-toradex.git/fs/binfmt_flat.c, branch v3.3.5

CRED: Fix load_flat_shared_library() to initialise bprm correctly

2011-05-03T00:10:51+00:00

Fix binfmt_flag's load_flat_shared_library() to initialise bprm correctly.

Currently, prepare_binprm() is called with only .filename .file and .cred
fields set in bprm, but the .cred_prepared and .per_clear fields at least need
initialising.

Reported-by: Tetsuo Handa 
Signed-off-by: David Howells 
Signed-off-by: James Morris

Fix common misspellings

2011-03-31T14:26:23+00:00

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi

flat: tweak default stack alignment

2010-06-29T22:29:31+00:00

The recent commit 1f0ce8b3dd667dca7 ("mm: Move ARCH_SLAB_MINALIGN and
ARCH_KMALLOC_MINALIGN to ") which moved the
ARCH_SLAB_MINALIGN default into the global header inadvertently broke FLAT
for a bunch of systems.  Blackfin systems now fail on any FLAT exec with:
Unable to read code+data+bss, errno 14 When your /init is a FLAT binary,
obviously this can be annoying ;).

This stems from the alignment usage in the FLAT loader.  The behavior
before was that FLAT would default to ARCH_SLAB_MINALIGN only if it was
defined, and this was only defined by arches when they wanted a larger
alignment value.  Otherwise it'd default to pointer alignment.  Arguably,
this is kind of hokey that the FLAT is semi-abusing defines it shouldn't.

So let's merge the two alignment requirements so the floor is never 0.

Signed-off-by: Mike Frysinger 
Cc: David McCullough 
Cc: Greg Ungerer 
Cc: Paul Mundt 
Cc: Michal Simek 
Cc: Hirokazu Takata 
Cc: Geert Uytterhoeven 
Cc: David Howells 
Cc: David Woodhouse 
Cc: Pekka Enberg 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

flat: fix unmap len in load error path

2010-06-04T22:21:45+00:00

The data chunk is mmaped with 'len' which remains unchanged, so use that
when unmapping in the error path rather than trying to recalculate (and
incorrectly so) the value used originally.

Signed-off-by: Mike Frysinger 
Acked-by: David McCullough 
Acked-by: Greg Ungerer 
Cc: Paul Mundt 
Cc: Michal Simek 
Cc: Hirokazu Takata 
Cc: Geert Uytterhoeven 
Acked-by: David Howells 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fs/binfmt_flat.c: split the stack & data alignments

2010-06-04T22:21:44+00:00

The stack and data have different alignment requirements, so don't force
them to wear the same shoe.  Increase the data alignment to match that
which the elf2flt linker script has always been using: 0x20 bytes.  Not
only does this bring the kernel loader in line with the toolchain, but it
also fixes a swath of gcc tests which try to force larger alignment values
but randomly fail when the FLAT loader fails to deliver.

Signed-off-by: Mike Frysinger 
Cc: Herbert Xu 
Cc: David Woodhouse 
Cc: Pekka Enberg 
Acked-by: David McCullough 
Acked-by: Greg Ungerer 
Cc: Paul Mundt 
Tested-by: Michal Simek 
Cc: Hirokazu Takata 
Cc: Yoshinori Sato 
Cc: Geert Uytterhoeven 
Cc: Jie Zhang 
Cc: David Howells 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

uclinux: error message when FLAT reloc symbol is invalid, v2

2010-04-21T03:28:49+00:00

This patch fixes a cosmetic error in printk. Text segment and data/bss
segment are allocated from two different areas. It is not meaningful to
give the diff between them in the error reporting messages.

Signed-off-by: Jun Sun 
Signed-off-by: Greg Ungerer

fs: use rlimit helpers

2010-03-06T19:26:29+00:00

Make sure compiler won't do weird things with limits.  E.g.  fetching them
twice may return 2 different values after writable limits are implemented.

I.e.  either use rlimit helpers added in commit 3e10e716abf3 ("resource:
add helpers for fetching rlimits") or ACCESS_ONCE if not applicable.

Signed-off-by: Jiri Slaby 
Cc: Alexander Viro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Split 'flush_old_exec' into two functions

2010-01-29T16:22:01+00:00

'flush_old_exec()' is the point of no return when doing an execve(), and
it is pretty badly misnamed.  It doesn't just flush the old executable
environment, it also starts up the new one.

Which is very inconvenient for things like setting up the new
personality, because we want the new personality to affect the starting
of the new environment, but at the same time we do _not_ want the new
personality to take effect if flushing the old one fails.

As a result, the x86-64 '32-bit' personality is actually done using this
insane "I'm going to change the ABI, but I haven't done it yet" bit
(TIF_ABI_PENDING), with SET_PERSONALITY() not actually setting the
personality, but just the "pending" bit, so that "flush_thread()" can do
the actual personality magic.

This patch in no way changes any of that insanity, but it does split the
'flush_old_exec()' function up into a preparatory part that can fail
(still called flush_old_exec()), and a new part that will actually set
up the new exec environment (setup_new_exec()).  All callers are changed
to trivially comply with the new world order.

Signed-off-by: H. Peter Anvin 
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds

mm: introduce coredump parameter structure

2009-12-17T23:45:31+00:00

Introduce coredump parameter data structure (struct coredump_params) to
simplify binfmt->core_dump() arguments.

Signed-off-by: Masami Hiramatsu 
Suggested-by: Ingo Molnar 
Cc: Hidehiro Kawai 
Cc: Oleg Nesterov 
Cc: Roland McGrath 
Cc: KOSAKI Motohiro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

flat: use IS_ERR_VALUE() helper macro

2009-09-24T14:21:03+00:00

There is a common macro now for testing mixed pointer/errno values, so use
that rather than handling the casts ourself.

Signed-off-by: Mike Frysinger 
Acked-by: David McCullough 
Acked-by: Greg Ungerer 
Cc: David Howells 
Cc: Paul Mundt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds