kernel/git/next/linux-next.git/arch/parisc/lib/fixup.S, branch master

parisc: Clean up fixup routines for get_user()/put_user()

2017-03-29T19:50:36+00:00

Al Viro noticed that userspace accesses via get_user()/put_user() can be simplified a lot with regard to usage of the exception handling. This patch implements a fixup routine for get_user() and put_user() in such that the exception handler will automatically load -EFAULT into the register %r8 (the error value) in case on a fault on userspace. Additionally the fixup routine will zero the target register on fault in case of a get_user() call. The target register is extracted out of the faulting assembly instruction. This patch brings a few benefits over the old implementation: 1. Exception handling gets much cleaner, easier and smaller in size. 2. Helper functions like fixup_get_user_skip_1 (all of fixup.S) can be dropped. 3. No need to hardcode %r9 as target register for get_user() any longer. This helps the compiler register allocator and thus creates less assembler statements. 4. No dependency on the exception_data contents any longer. 5. Nested faults will be handled cleanly. Reported-by: Al Viro Cc: # v4.9+ Signed-off-by: Helge Deller

parisc: Add cfi_startproc and cfi_endproc to assembly code

2016-10-05T20:54:40+00:00

Add ENTRY_CFI() and ENDPROC_CFI() macros for dwarf debug info and convert assembly users to new macros. Signed-off-by: Helge Deller

parisc: Unbreak handling exceptions from kernel modules

2016-04-08T20:14:14+00:00

Handling exceptions from modules never worked on parisc. It was just masked by the fact that exceptions from modules don't happen during normal use. When a module triggers an exception in get_user() we need to load the main kernel dp value before accessing the exception_data structure, and afterwards restore the original dp value of the module on exit. Noticed-by: Mikulas Patocka Signed-off-by: Helge Deller Cc: stable@vger.kernel.org

parisc: percpu: update comments referring to __get_cpu_var

2014-12-13T20:42:53+00:00

__get_cpu_var was removed. Update comments to refer to this_cpu_ptr() instead. Signed-off-by: Christoph Lameter Cc: "James E.J. Bottomley" Cc: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

percpu: remove per_cpu__ prefix.

2009-10-29T13:34:15+00:00

Now that the return from alloc_percpu is compatible with the address of per-cpu vars, it makes sense to hand around the address of per-cpu variables. To make this sane, we remove the per_cpu__ prefix we used created to stop people accidentally using these vars directly. Now we have sparse, we can use that (next patch). tj: * Updated to convert stuff which were missed by or added after the original patch. * Kill per_cpu_var() macro. Signed-off-by: Rusty Russell Signed-off-by: Tejun Heo Reviewed-by: Christoph Lameter

Revert "parisc: fix trivial section name warnings"

2008-06-13T14:49:45+00:00

This reverts commit bd3bb8c15b9a80dbddfb7905b237a4a11a4725b4. Signed-off-by: Kyle McMartin

parisc: fix trivial section name warnings

2008-05-15T14:38:54+00:00

This trivial patch fixes the following section warnings on PARISC: > WARNING: vmlinux.o (.text.1): unexpected section name. >The (.[number]+) following section name are ld generated and not expected. > Did you forget to use "ax"/"aw" in a .S file? > Note that for example contains > section definitions for use in .S files. Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin

[PARISC] add ASM_EXCEPTIONTABLE_ENTRY() macro

2007-02-17T06:16:26+00:00

- this macro unifies the code to add exception table entries - additionally use ENTRY()/ENDPROC() at more places Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin

Remove obsolete #include

2006-06-30T17:25:36+00:00

Signed-off-by: Jörn Engel Signed-off-by: Adrian Bunk

[PARISC] Specify level to fix binutils level promotion bug

2005-10-22T02:56:35+00:00

fixup.S needs to specify .level and use correct LDREG macro. New binutils has a bug where it doesn't "promote" from PA1.0 to PA1.1 correctly when using ",s" completer. remove use of __LP64__ in assembly.h and add some white space. Signed-off-by: Grant Grundler Signed-off-by: Kyle McMartin