linux.git/arch/sh/lib, branch v2.6.30

sh: Handle calling csum_partial with misaligned data

2009-01-29T02:56:02+00:00

In rare circumstances csum_partial() can be called with data which is
not 16 or 32 bit aligned. This is been observed with RPC calls for NFS
file systems for example. Add support for handling this without resorting
to the misaligned fixup code (which is why this hasn't been seen as a
problem). This mimics the i386 version, which has had this support for
some time.

Signed-off-by: Stuart Menefy 
Signed-off-by: Paul Mundt

sh: Add plain udivsi3 (not _i4*) for gcc-4.1 and lower.

2008-12-22T09:43:53+00:00

We chan't share code for udivsi3 and udivsi3_i4, because they
have a different clobber list. Copy udivsi3 from gcc-4.1.2.

As shown in arch/sh/lib/udivsi3.S (and -Os.S),

  .global __udivsi3_i4i
  .global __udivsi3_i4
  .global __udivsi3
__udivsi3_i4i:
  ...

Three symbols are sharing one code, which is actually udivsi3_i4i.
But, this results unwanted code with gcc 4.1.

In gcc, these three are treated as pseudo instructions that have
their own clobber list apart from the usual calling convention.

According to sh's machine description. The clobber list is as
follows:

 - udivsi3_i4i : t,r1,pr,mach,macl
 - udivsi3_i4  : t,r0,r1,r4,r5,pr,dr0,dr2,dr4
 - udivsi3     : t,r4,pr

The caller of udivsi3 will be left with a broken r1 and mac*.

gcc-4.1.x and older(at least to 3.4) generate udivsi3.
ST's gcc-4.1.1 seems to be OK because it has _i4i.

Signed-off-by: Takashi YOSHII 
Signed-off-by: Paul Mundt

sh: Add exports for udivsi3/sdivsi3 and the _i4 versions.

2008-12-22T09:42:54+00:00

Needed by older compilers.

Signed-off-by: Paul Mundt

sh: Migrate necessary libgcc bits in to arch/sh/lib for SUPERH32.

2008-12-22T09:42:53+00:00

This moves in the necessary libgcc bits for SUPERH32 and drops the
libgcc linking for the regular targets. This in turn allows us to rip
out quite a few hacks both in sh_ksyms_32 and arch/sh/Makefile.

Signed-off-by: Paul Mundt

sh: dynamic ftrace support.

2008-12-22T09:42:52+00:00

First cut at dynamic ftrace support.

Signed-off-by: Matt Fleming 
Signed-off-by: Paul Mundt

sh: __copy_user function can corrupt the stack in case of exception

2008-11-13T08:40:30+00:00

The __copy_user function can corrupt the stack in the case of a
non-trivial length of data, and either of the first two move instructions
cause an exception. This is because the fixup for these two instructions
is mapped to the no_pop case, but these instructions execute after the
stack is pushed.

This change creates an explicit NO_POP exception mapping macro, and uses
it for the two instructions executed in the trivial case where no stack
pushes occur.

More information at ST Linux bugzilla:

	https://bugzilla.stlinux.com/show_bug.cgi?id=4824

Signed-off-by: Dylan Reid 
Signed-off-by: Stuart Menefy 
Signed-off-by: Paul Mundt

sh: Fix up the __raw_read/writeX() definitions.

2008-10-01T06:12:27+00:00

These were doing largely bogus things and using the wrong typing for
the address. Bring these in line with the ARM definitions.

Signed-off-by: Paul Mundt

sh: fixup many sparse errors.

2008-09-08T01:35:04+00:00

Signed-off-by: Paul Mundt

move arch/sh/lib/io.o to obj-y

2008-07-28T09:10:28+00:00

EXPORT_SYMBOL's in lib-y considered harmful:

<--  snip  -->

...
  MODPOST 1837 modules
ERROR: "__raw_readsl" [drivers/ssb/ssb.ko] undefined!
ERROR: "__raw_writesl" [drivers/ssb/ssb.ko] undefined!
ERROR: "__raw_writesl" [drivers/net/smc91x.ko] undefined!
ERROR: "__raw_readsl" [drivers/net/smc91x.ko] undefined!
ERROR: "__raw_writesl" [drivers/net/3c59x.ko] undefined!
ERROR: "__raw_readsl" [drivers/net/3c59x.ko] undefined!
...
make[2]: *** [__modpost] Error 1

<--  snip  -->

Reported-by: Adrian Bunk 
Signed-off-by: Adrian Bunk 
Signed-off-by: Paul Mundt

sh: Fix up optimized SH-4 memcpy on big endian.

2008-05-16T05:55:07+00:00

Signed-off-by: Hideo Saito 
Signed-off-by: Paul Mundt