linux-toradex.git/arch/powerpc/kernel/systbl.S, branch v3.9.2

[POWERPC] Align the sys_call_table

2007-10-11T04:36:47+00:00

Our _GLOBAL macro does a ".align 2" so the alignment is fine for 32
bit, but on 64 bit it is possible for it to end up only 4 byte aligned.
I don't know if it matters, but it can't hurt to 8 byte align it.

It also means that when we build with --emit_relocs, none of our 64 bit
relocations are to misaligned places.

Signed-off-by: Stephen Rothwell 
Signed-off-by: Paul Mackerras

Remove obsolete #include

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

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

[POWERPC] Unify ppc syscall tables

2006-06-21T05:01:32+00:00

Avoid duplication of the syscall table for the cell platform.  Based on an
idea from David Woodhouse.

Signed-off-by: Andreas Schwab 
Acked-by: Arnd Bergmann 
Signed-off-by: Paul Mackerras

[PATCH] powerpc: wire up sys_[gs]et_robust_list

2006-05-23T17:35:32+00:00

Signed-off-by: David Woodhouse 
Cc: Benjamin Herrenschmidt 
Acked-by: Paul Mackerras 
Cc: Arnd Bergmann 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] powerpc: Wire up *at syscalls

2006-04-28T11:04:59+00:00

Wire up *at syscalls.

This patch has been tested on ppc64 (using glibc's testsuite, both 32bit
and 64bit), and compile-tested for ppc32 (I have currently no ppc32 system
available, but I expect no problems).

Signed-off-by: Andreas Schwab 
Signed-off-by: Paul Mackerras

[PATCH] Add support for the sys_vmsplice syscall

2006-04-26T08:59:21+00:00

sys_splice() moves data to/from pipes with a file input/output. sys_vmsplice()
moves data to a pipe, with the input being a user address range instead.

This uses an approach suggested by Linus, where we can hold partial ranges
inside the pages[] map. Hopefully this will be useful for network
receive support as well.

Signed-off-by: Jens Axboe

[PATCH] powerpc/cell: remove BUILD_BUG_ON and add sys_tee to spu_syscall_table

2006-04-21T12:32:50+00:00

Every time a new syscall gets added, a BUILD_BUG_ON in
arch/powerpc/platforms/cell/spu_callbacks.c gets triggered.
Since the addition of a new syscall is rather harmless,
the error should just be removed.

While we're here, add sys_tee to the list and add a comment
to systbl.S to remind people that there is another list
on powerpc.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Paul Mackerras

[PATCH] splice: add support for sys_tee()

2006-04-11T13:51:17+00:00

Basically an in-kernel implementation of tee, which uses splice and the
pipe buffers as an intelligent way to pass data around by reference.

Where the user space tee consumes the input and produces a stdout and
file output, this syscall merely duplicates the data inside a pipe to
another pipe. No data is copied, the output just grabs a reference to the
input pipe data.

Signed-off-by: Jens Axboe

ppc64: actually add sys_splice() to the system call table

2006-04-02T17:44:36+00:00

(We'd only added the number, which meant that actually trying
to use splice just went off into la-la-land)

Signed-off-by: Linus Torvalds

powerpc: Fix various syscall/signal/swapcontext bugs

2006-03-08T02:24:22+00:00

A careful reading of the recent changes to the system call entry/exit
paths revealed several problems, plus some things that could be
simplified and improved:

* 32-bit wasn't testing the _TIF_NOERROR bit in the syscall fast exit
  path, so it was only doing anything with it once it saw some other
  bit being set.  In other words, the noerror behaviour would apply to
  the next system call where we had to reschedule or deliver a signal,
  which is not necessarily the current system call.

* 32-bit wasn't doing the call to ptrace_notify in the syscall exit
  path when the _TIF_SINGLESTEP bit was set.

* _TIF_RESTOREALL was in both _TIF_USER_WORK_MASK and
  _TIF_PERSYSCALL_MASK, which is odd since _TIF_RESTOREALL is only set
  by system calls.  I took it out of _TIF_USER_WORK_MASK.

* On 64-bit, _TIF_RESTOREALL wasn't causing the non-volatile registers
  to be restored (unless perhaps a signal was delivered or the syscall
  was traced or single-stepped).  Thus the non-volatile registers
  weren't restored on exit from a signal handler.  We probably got
  away with it mostly because signal handlers written in C wouldn't
  alter the non-volatile registers.

* On 32-bit I simplified the code and made it more like 64-bit by
  making the syscall exit path jump to ret_from_except to handle
  preemption and signal delivery.

* 32-bit was calling do_signal unnecessarily when _TIF_RESTOREALL was
  set - but I think because of that 32-bit was actually restoring the
  non-volatile registers on exit from a signal handler.

* I changed the order of enabling interrupts and saving the
  non-volatile registers before calling do_syscall_trace_leave; now we
  enable interrupts first.

Signed-off-by: Paul Mackerras