linux-user: improve fake /proc/self/stat making `ps` not segfault.

With the current fake /proc/self/stat implementation `ps` is
segfaulting because it expects to read PID and argv[0] as first and
second field respectively, with the latter being enclosed between
backets.

Reproducing is as easy as running: `ps` inside qemu-user chroot
with /proc mounted.

Signed-off-by: Fabio Erculiani <lxnay@sabayon.org>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user: target_argv is placed on ts->bprm->argv and can't be freed()

TaskState contains linux_bprm struct which encapsulates argv among
other things.
argv might be used around the code and is expected to contain valid
data. Before this patch, ts->bprm->argv was NULL due to it being
freed right after loader_exec().

Signed-off-by: Fabio Erculiani <lxnay@sabayon.org>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user: implement device mapper ioctls

This patch implements all ioctls currently implemented by device mapper,
enabling us to run dmsetup and kpartx inside of linux-user.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user: add struct old_dev_t compat

The compat LOOP_SET_STATUS ioctl uses struct old_dev_t in its passed
struct. That variable type is vastly different between different
architectures. Implement wrapping around it so we can use it.

This fixes running arm kpartx on an x86_64 host for me.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user: fix BLK ioctl arguments

Some BLK ioctls passed sizeof(x) into a macro that already did sizeof() on
the passed in argument, rendering the size information inside the ioctl be
the size of the host default integer type.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user: add BLKSSZGET ioctl wrapper

This patch adds an ioctl definition for BLKSSZGET.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user: Add ioctl for BLKBSZGET

This patch adds the ioctl wrapper definition for BLKBSZGET.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user: fix fallocate

Fallocate gets off_t parameters passed in, so we should also read them out
accordingly.

Signed-off-by: Alexander Graf <agraf@suse.de>

---

v1 -> v2:

  - unbreak 64-bit guests

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user: take RESERVED_VA into account for g2h_valid()

When running with -R (RESERVED_VA > 0) all guest virtual addresses
are within the [0..RESERVED_VA] range. Reflect this with g2h_valid()
too so we can safely check for boundaries of our guest address space.

This is required to have the /proc/self/maps code not show maps that
aren't accessible from the guest process's point of view.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user: resolve reserved_va vma downwards

After consulting with Paul Brook, we concluded that it's best to search
the VMA space downwards, so that we don't even get the chance to conflict
with the brk range.

This patch resolves a bunch of allocation conflicts when using -R.

Signed-off-by: Alexander Graf <agraf@suse.de>
[minor changes to get it to apply -- PMM]

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user: reserve 4GB of vmem for 32-on-64

When running 32-on-64 bit guests, we should always reserve as much
virtual memory as we possibly can for the guest process, so it can
never overlap with QEMU address space.

Fortunately we already have the infrastructure for that. All that's
missing is some sane default value to also make use of it!

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user/syscall.c: Fix indentation in prctl handling

Clean up the odd indentation of this switch statement before
we double its size by adding new cases to it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user: Add support for prctl PR_GET_NAME and PR_SET_NAME

Add support for the prctl options PR_GET_NAME and PR_SET_NAME,
which take or return a name in a 16 byte buffer pointed to by arg2.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
linux-user/arm/syscall_nr.h: Add syscall number for ppoll

The list of ARM syscall numbers was missing the entry for ppoll,
which meant we were accidentally not providing it. (This wasn't
causing any practical issues beyond warnings about unimplemented
syscalls, because glibc will fall back to another code path if the
syscall isn't present.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
arm-linux-user: fix elfload.c's AT_HWCAP to reflect cpu features.

The cpu capabilities passed by the elf loader in AT_HWCAP where
a constant.
Make AT_HWCAP reflect the emulated cpu features in order to give
correct clues to eglibc.

Riku Voipio: fixed to apply to current head

Fix :  [Bug 887516] [NEW] VFP support reported for the PXA270

Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
elf.h: Update EF_ARM_ constants to newer ABI versions

Update the EF_ARM_* constants (for the ELF header e_flags field)
to include the newer flags specified for later versions of the ABI.
(This set of constants is from include/elf/arm.h from binutils-2.17
and so licensed under GPL-v2-or-later.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Userspace ARM BE8 support

Add support for ARM BE8 userspace binaries.
i.e. big-endian data and little-endian code.
In principle LE8 mode is also possible, but AFAIK has never actually
been implemented/used.

System emulation doesn't have any useable big-endian board models,
but should in principle work once you fix that.
Dynamic endianness switching requires messing with data accesses,
preferably with TCG cooperation, and is orthogonal to BE8 support.

Signed-off-by: Paul Brook <paul@codesourcery.com>
[PMM: various changes, mostly as per my suggestions in code review:
 * rebase
 * use EF_ defines rather than hardcoded constants
 * make bswap_code a bool for future VMSTATE macro compatibility
 * update comment in cpu.h about TB flags bit field usage
 * factor out load-code-and-swap into arm_ld*_code functions and
   get_user_code* macros
 * fix stray trailing space at end of line
 * added braces in disas.c to satisfy checkpatch
]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
target-sparc: Rename cpu_init.c

Align QOM'ified targets, with a view to simplify Makefile.target.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
target-sparc: QOM'ify CPU

Embed CPUSPARCState as first member of SPARCCPU.
Drop cpu_sparc_close() in favor of object_delete() and a finalizer.
Let cpu_state_reset() call cpu_reset().

Make TYPE_SPARC_CPU non-abstract for now.
Distinguish between "sparc-cpu" and "sparc64-cpu".

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
main loop: use msec-based timeout in glib_select_fill

The timeval-based timeout is not needed until we actually invoke select,
so compute it only then.  Also group the two calls that modify the
timeout, glib_select_fill and os_host_main_loop_wait.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>