linux.git/fs/binfmt_flat.c, branch v4.13

binfmt_flat: Use %u to format u32

2017-07-16T16:24:05+00:00

Several variables had their types changed from unsigned long to u32, but
the printk()-style format to print them wasn't updated, leading to:

    fs/binfmt_flat.c: In function ‘load_flat_file’:
    fs/binfmt_flat.c:577: warning: format ‘%ld’ expects type ‘long int’, but argument 3 has type ‘u32’

Fixes: 468138d78510688f ("binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail")
Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Linus Torvalds

binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail

2017-07-03T22:44:02+00:00

on MMU targets EFAULT is possible here.  Make both return 0 or error,
passing what used to be the return value of flat_get_addr_from_rp()
by reference.

Signed-off-by: Al Viro

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:36+00:00

We are going to split  out of , which
will have to be picked up from other headers and a couple of .c files.

Create a trivial placeholder  file that just
maps to  to make this patch obviously correct and
bisectable.

Include the new header in the files that are going to need it.

Acked-by: Linus Torvalds 
Cc: Mike Galbraith 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

binfmt_flat: allow compressed flat binary format to work on MMU systems

2016-07-28T03:29:12+00:00

Let's take the simple and obvious approach by decompressing the binary
into a kernel buffer and then copying it to user space.  Those who are
looking for top performance on an MMU system are unlikely to choose this
executable format anyway.

Signed-off-by: Nicolas Pitre 
Reviewed-by: Greg Ungerer 
Signed-off-by: Greg Ungerer

binfmt_flat: add MMU-specific support

2016-07-28T03:29:12+00:00

Not much else to do at this point except for the different stack setups.

Signed-off-by: Nicolas Pitre 
Reviewed-by: Greg Ungerer 
Signed-off-by: Greg Ungerer

binfmt_flat: update libraries' data segment pointer with userspace accessors

2016-07-28T03:29:11+00:00

This is needed on systems with a MMU.  This also gets rid of the
strangest C code I've seen lateli i.e. an integer indexed with a
pointer value within square brackets. That really looked backwards.

Signed-off-by: Nicolas Pitre 
Reviewed-by: Greg Ungerer 
Signed-off-by: Greg Ungerer

binfmt_flat: use clear_user() rather than memset() to clear .bss

2016-07-28T03:29:11+00:00

This is needed on systems with a MMU.

Signed-off-by: Nicolas Pitre 
Reviewed-by: Greg Ungerer 
Signed-off-by: Greg Ungerer

binfmt_flat: use proper user space accessors with old relocs code

2016-07-28T03:28:58+00:00

Signed-off-by: Nicolas Pitre 
Reviewed-by: Greg Ungerer 
Signed-off-by: Greg Ungerer

binfmt_flat: use proper user space accessors with relocs processing code

2016-07-25T06:52:06+00:00

Relocs are fixed up in place in user space memory.  The appropriate
accessors are required for this code to work with an active MMU.

The architecture specific handlers flat_get_addr_from_rp() and
flat_put_addr_at_rp() for ARM and M68K are adjusted with separate
patches. SuperH and Xtensa are left out as they doesn't implement
__get_user_unaligned() and __put_user_unaligned() yet. The other
architectures that use BFLT don't have any MMU.

Signed-off-by: Nicolas Pitre 
Reviewed-by: Greg Ungerer 
Signed-off-by: Greg Ungerer

binfmt_flat: clean up create_flat_tables() and stack accesses

2016-07-25T06:52:01+00:00

In addition to better code clarity, this brings proper usage of
user memory accessors everywhere the stack is touched. This is essential
for making this work on MMU systems.

Signed-off-by: Nicolas Pitre 
Reviewed-by: Greg Ungerer 
Signed-off-by: Greg Ungerer