This patch converts the ISA MMIO bridge code to always use little endian mmio.
All bswap code that existed was only there to convert from native cpu
endianness to little endian ISA devices.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

This patch replaces explicit bswaps with endianness hints to the
mmio layer.

Because we don't depend on the target endianness anymore, we can also
move the driver over to Makefile.objs.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

This patch replaces explicit bswaps with endianness hints to the
mmio layer.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

The e1000 has compatibility code to handle big endianness which makes it
mandatory to be recompiled on different targets.

With the generic mmio endianness solution, there's no need for that anymore.
We just declare all mmio to be little endian and call it a day.

Because we don't depend on the target endianness anymore, we can also
move the driver over to Makefile.objs.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

There's no need to bswap once we correctly set the mmio to be little endian.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

The only reason we have bswap versions of the pci host code is that
most pci host devices are little endian. The ppc e500 is the only
odd one here, being big endian.

So let's directly pass the endianness down to the mmio layer and not
worry about it on the pci host layer.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

The device is only used on big endian systems, but always byte swaps. That's
a very good indicator that it's actually a little endian device ;-).
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

As an alternative to the 3 individual handlers, there is also a simplified
io mem hook function. To be consistent, let's add an endianness parameter
there too.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

As stated before, devices can be little, big or native endian. The
target endianness is not of their concern, so we need to push things
down a level.

This patch adds a parameter to cpu_register_io_memory that allows a
device to choose its endianness. For now, all devices simply choose
native endian, because that's the same behavior as before.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

The way we're currently modeling mmio is too simplified. We assume that
every device has the same endianness as the target CPU. In reality,
most devices are little endian (all PCI and ISA ones I'm aware of). Some
are big endian (special system devices) and a very little fraction is
target native endian (fw_cfg).

So instead of assuming every device to be native endianness, let's move
to a model where the device tells us which endianness it's in.

That way we can compile the devices only once and get rid of all the ugly
swap will be done by the underlying layer.

For the same of readability, this patch only introduces the helper framework
but doesn't allow the registering code to set its endianness yet.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Read should return bytes instead of samples.
Signed-off-by: NMichael Walle <michael@walle.cc>
Signed-off-by: Nmalc <av1474@comtv.ru>

I get a warning on a signed comparison with an unsigned variable, so
let's make the variable signed and be happy.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NEdgar E. Iglesias <edgar@axis.com>

Move the last found TB to the head of the list so it will be found more quickly next time it will be looked for.
Signed-off-by: NKirill Batuzov <batuzovk@ispras.ru>
Signed-off-by: NPavel Yushchenko <pau@ispras.ru>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Remove the spin_trylock() function, as it is not used anywhere,
and is not even implemented if CONFIG_USE_NPTL is defined.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

The redundant forward declaration of qerror in machload.c
is removed because it should be taken from qemu.h.

Please note that this patch is untested because
I have no matching environment to compile it.

Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

This change was missing in commit
9a78eead.

Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

This patch adds more printf format checking.

Additional modifications were needed for this code change:

* alpha-dis.c: The local definition of MAX conflicts with
  a previous definition from osdep.h, so add an #undef.

* dis-asm.h: Add include for fprintf_function (qemu-common.h).
  The standard (now redundant) includes are removed.

* mis-dis.c: The definition of ARRAY_SIZE is no longer needed
  and must be removed (conflict with previous definition from
  qemu-common.h).

* sh4-dis.c: Remove some unneeded forward declarations.

Cc: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: NStefan Weil <weil@mail.berlios.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

ffsl() is not universally available, so there are these warnings
on both mingw32 and OpenBSD:
/src/qemu/hw/pcie_aer.c: In function 'pcie_aer_update_log':
/src/qemu/hw/pcie_aer.c:399: warning: implicit declaration of function 'ffsl'

Since status field in PCIEAERErr is uint32_t, we can just use ffs() instead.
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

* 'linux-user-for-upstream' of git://gitorious.org/qemu-maemo/qemu:
  linux-user: fix mips and ppc to use UID16
  update binfmt conf
  linux-user: fix compiler error on nptl
  ARM: linux-user: Restore iWMMXT state from ucontext on sigreturn
  ARM: linux-user: Expose iWMMXT registers to signal handlers
  ARM: linux-user: Restore VFP state from ucontext on sigreturn
  ARM: linux-user: Expose VFP registers to signal handlers
  ARM: Expose vfp_get_fpscr() and vfp_set_fpscr() to C code
  ARM: linux-user: Correct size of padding in target_ucontext_v2
  target-sparc: remove unused functions cpu_lock(), cpu_unlock()
  ARM: enable XScale/iWMMXT in linux-user mode
  linux-user: Translate getsockopt level option
  linux-user: remove unnecessary local from __get_user(), __put_user()
  linux-user: fix memory leaks with NPTL emulation
  linux-user: mmap_reserve() not controlled by RESERVED_VA
  [PATCH] target-arm: remove unused functions cpu_lock(), cpu_unlock()

Remove the debugging fprintf() slipped in via the following commit:

    commit b2e0a138
    Author: Michael S. Tsirkin <mst@redhat.com>
    Date:   Mon Nov 22 19:52:34 2010 +0200

        migration: stable ram block ordering
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

Signed-off-by: NMartin Mohring <martin.mohring@5edatasoft.com>
Signed-off-by: NJan-Simon Möller <jsmoeller@linuxfoundation.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

1) dont register i386 qemu on x86_64 host
2) widen sparc and arm match
3) add sh4, based on patch by David Kozub <zub@linux.fjfi.cvut.cz>

Rest based on patch by Jan-Simon Möller <jsmoeller@linuxfoundation.org>

Some compilers detect that new_stack isnt used after dd75d784
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

Restore the VFP registers from the ucontext on return from a signal
handler in linux-user mode. This means that signal handlers cannot
accidentally corrupt the interrupted code's VFP state, and allows
them to deliberately modify the state via the ucontext structure.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

For ARM linux-user mode signal handlers, fill in the ucontext with
VFP register contents in the same way that the kernel does. We only
do this for v2 format sigframe (2.6.12 and above); this is actually
bug-for-bug compatible with the older kernels, which don't save and
restore VFP registers either.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

Expose the vfp_get_fpscr() and vfp_set_fpscr() functions to C
code as well as generated code, so we can use them to read and
write the FPSCR when saving and restoring VFP registers across
signal handlers in linux-user mode.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

The padding in the target_ucontext_v2 is defined by the size of
the target's sigset_t type, not the host's. (This bug only causes
problems when we start using the uc_regspace[] array to expose
VFP registers to userspace signal handlers.)
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

In linux-user mode, the XScale/iWMMXT coprocessors must be enabled
at reset so that we can run code that uses these instructions.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

n setsockopt, the socket level options are translated to the hosts'
architecture before the real syscall is called, e.g.
TARGET_SO_TYPE -> SO_TYPE. This patch does the same with getsockopt.

Tested on a x86 host emulating MIPS.  Without it:-

$ grep getsockopt host.strace
31311 getsockopt(3, SOL_SOCKET, 0x1007 /* SO_??? */, 0xbff17208,
0xbff17204) = -1 ENOPROTOOPT (Protocol not available)

With:-

$ grep getsockopt host.strace
25706 getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0

Whitespace cleanup: Riku Voipio
Signed-off-by: NJamie Lentin <jm@lentin.co.uk>
Signed-off-by: NRiku Voipio <riku.voipio@iki.fi>

Remove an unnecessary local variable from the __get_user() and
__put_user() macros. This avoids confusing compilation failures
if the name of the local variable ('size') happens to be the
same as the variable the macro user is trying to read/write.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

Running programs that create large numbers of threads, such as this
snippet from libstdc++'s pthread7-rope.cc:

  const int max_thread_count = 4;
  const int max_loop_count = 10000;
  ...
  for (int j = 0; j < max_loop_count; j++)
    {
      ...
      for (int i = 0; i < max_thread_count; i++)
	pthread_create (&tid[i], NULL, thread_main, 0);

      for (int i = 0; i < max_thread_count; i++)
	pthread_join (tid[i], NULL);
    }

in user-mode emulation will quickly run out of memory.  This is caused
by a failure to free memory in do_syscall prior to thread exit:

          /* TODO: Free CPU state.  */
          pthread_exit(NULL);

The first step in fixing this is to make all TaskStates used by QEMU
dynamically allocated.  The TaskState used by the initial thread was
not, as it was allocated on main's stack.  So fix that, free the
cpu_env, free the TaskState, and we're home free, right?

Not exactly.  When we create a thread, we do:

        ts = qemu_mallocz(sizeof(TaskState) + NEW_STACK_SIZE);
        ...
        new_stack = ts->stack;
        ...
        ret = pthread_attr_setstack(&attr, new_stack, NEW_STACK_SIZE);

If we blindly free the TaskState, then, we yank the current (host)
thread's stack out from underneath it while it still has things to do,
like calling pthread_exit.  That causes problems, as you might expect.

The solution adopted here is to let the C library allocate the thread's
stack (so the C library can properly clean it up at pthread_exit) and
provide a hint that we want NEW_STACK_SIZE bytes of stack.

With those two changes, we're done, right?  Well, almost.  You see,
we're creating all these host threads and their parent threads never
bother to check that their children are finished.  There's no good place
for the parent threads to do so.  Therefore, we need to create the
threads in a detached state so the parent thread doesn't have to call
pthread_join on the child to release the child's resources; the child
does so automatically.

With those three major changes, we can comfortably run programs like the
above without exhausting memory.  We do need to delete 'stack' from the
TaskState structure.
Signed-off-by: NNathan Froyd <froydnj@codesourcery.com>
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>

mmap_reserve() should be called only when RESERVED_VA is enabled.
Otherwise, unmaped virtual address space will never be reusable. This
bug will exhaust virtual address space in extreme conditions.
Signed-off-by: NRiku Voipio <riku.voipio@nokia.com>