This patch adds loading, stamp checking and initialization of modules.

The init function of dynamic module is no longer directly called as
__attribute__((constructor)) in static linked version, it is called
only after passed the checking of presense of stamp symbol:

    qemu_stamp_$RELEASEHASH

where $RELEASEHASH is generated by hashing version strings and content
of configure script.

With this, modules built from a different tree/version/configure will
not be loaded.

The module loading code requires gmodule-2.0.

Modules are searched under
 - CONFIG_MODDIR
 - executable folder (to allow running qemu-{img,io} in the build
   directory)
 - ../ of executable folder (to allow running system emulator in the
   build directory)

Modules are linked under their subdir respectively, then copied to top
level of build directory for above convinience, e.g.:
    $(BUILD_DIR)/block/curl.so -> $(BUILD_DIR)/block-curl.so
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Add necessary rules and flags for shared object generation.
The new rules introduced here are:

1) %.o in $(common-obj-m) is compiled to %.o, then linked to %.so.

2) %.mo in $(common-obj-m) is the placeholder for %.so for pattern
matching in Makefile. It's linked to "-shared" with all its dependencies
(multiple *.o) as input. Which means the list of depended objects must
be specified in each sub-Makefile.objs:

    foo.mo-objs := bar.o baz.o qux.o

in the same style with foo.o-cflags and foo.o-libs. The objects here
will be prefixed with "$(obj)/" if it's a subdirectory Makefile.objs.

3) For all files ending up in %.so, the following is added automatically:

    foo.o-cflags += -fPIC -DBUILD_DSO

Also introduce --enable-modules in configure, the option will enable
support of shared object build. Otherwise objects are static linked to
executables.
Signed-off-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

While -mdynamic-no-pic can speed up the code somewhat, it is only used
on the legacy PowerPC Mac OS X, and I am not sure if anyone is still
testing that.  Disabling PIC can cause problems when enabling modules,
so do not do that.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

No longer adds flags and libs for them to global variables, instead
create config-host.mak variables like FOO_CFLAGS and FOO_LIBS, which is
used as per object cflags and libs.

This removes unwanted dependencies from libcacard.
Signed-off-by: NFam Zheng <famz@redhat.com>
[Split from Fam's patch to enable modules. - Paolo]
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Adds extract-libs in LINK to expand any "per object libs", the syntax to define
such a libs options is like:

        foo.o-libs := $(CURL_LIBS)

in block/Makefile.objs.

Similarly,

        foo.o-cflags := $(FOO_CFLAGS)

is also supported.

"foo.o" must be listed in a nested var (e.g. common-obj-y) to make the
option variables effective.
Signed-off-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

Makefile.target includes rule.mak and unnested common-obj-y, then prefix
them with '../', this will ignore object specific QEMU_CFLAGS in subdir
Makefile.objs:

    $(obj)/curl.o: QEMU_CFLAGS += $(CURL_CFLAGS)

Because $(obj) here is './block', instead of '../block'. This doesn't
hurt compiling because we basically build all .o from top Makefile,
before entering Makefile.target, but it will affact arriving per-object
libs support.

The starting point of $(obj) is passed in as argument of unnest-vars, as
well as nested variables, so that different Makefiles can pass in a
right value.
Signed-off-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

With this change, main() calls qemu_init_exec_dir and uses argv[0] to
init exec_dir. The saved value can be retrieved with
qemu_get_exec_dir later. It will be reused by module loading.
Signed-off-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

This resolves the build issue with building the ROMs on OpenBSD on x86 archs.
As of OpenBSD 5.3 the compiler builds PIE binaries by default and thus the
whole OS/packages and so forth. The ROMs need to have PIE disabled.
Check in configure whether the compiler supports the flags for disabling
PIE, and if it does then use them for building the ROMs. This fixes the
following buildbot failure:

>From the OpenBSD buildbots..
  Building optionrom/multiboot.img
ld: multiboot.o: relocation R_X86_64_16 can not be used when making a shared object; recompile with -fPIC

Signed-off by: Brad Smith <brad@comstyle.com>
Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Since commit 999b53ec:
 Author: Claudio Fontana <claudio.fontana@linaro.org>
 Date:   Wed Feb 5 17:27:28 2014 +0000

    disas: Implement disassembly output for A64

    Use libvixl to implement disassembly output in debug
    logs for A64, for use with both AArch64 hosts and targets.

disas/libvixl/ contains functions which uses 64bit constants
without using appropriate suffixes, which fails on 32bits.

Fix this by using ULL suffix.
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

trivial patches for 2014-02-15

# gpg: Signature made Sat 15 Feb 2014 12:10:46 GMT using RSA key ID 74F0C838
# gpg: Good signature from "Michael Tokarev <mjt@tls.msk.ru>"
# gpg:                 aka "Michael Tokarev <mjt@corpit.ru>"
# gpg:                 aka "Michael Tokarev <mjt@debian.org>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 6EE1 95D1 886E 8FFB 810D  4324 457C E0A0 8044 65C5
#      Subkey fingerprint: E190 8639 3B10 B51B AC2C  8B73 5253 C5AD 74F0 C838

* remotes/mjt/tags/trivial-patches-2014-02-15:
  char/serial: Fix emptyness check
  gitignore: anchor all ignored names
  vl: trim includes
  vl: remove old, long-unused defines
  net: declare struct iovec in checksum.h to fix compiler warning
  linux-user: refactor do_socketcall()
  configure: add hints to a remedy for feature_not_found errors
  configure: add hint of libfdt to DTC dependency not found message
  sparc/leon3: Initialize stack pointer
  misc: Fix case Qemu -> QEMU
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Block pull request

# gpg: Signature made Fri 14 Feb 2014 17:26:30 GMT using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8

* remotes/stefanha/tags/block-pull-request:
  block: Open by reference will try device then node_name.
  block: Relax bdrv_lookup_bs constraints.
  blockdev: Fix wrong usage of QDECREF causing snapshoted quorum to crash on close.
  block: mirror - use local_err to avoid NULL errp
  qemu-iotests: Don't run 005 on vmdk split formats
  block: qemu-iotests - add vhdx log replay tests for qemu-img
  block: qemu-iotests - fix test 070 (vhdx)
  block: Don't throw away errno via error_setg
  block: Add notes to iSCSI's .bdrv_open and .bdrv_reopen_prepare
  blockdev: Remove 'type' parameter from blockdev_init()
  sdhci: Drop unnecessary #include
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

* remotes/jliu/or32-ld-st:
  target-openrisc: Use new qemu_ld/st opcodes
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

* remotes/jovanovic/mips-ufrp:
  target-mips: add user-mode FR switch support for MIPS32r5
  target-mips: add support for CP0_Config5
  target-mips: add support for CP0_Config4
  target-mips: add CPU definition for MIPS32R5
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

This was guarding against a full fifo rather than an empty fifo when
popping. Fix.
Signed-off-by: NPeter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: NMartin Kletzander <mkletzan@redhat.com>
Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

by default, patterns/names in .gitignore are applied
recursively to all subdirectories.  So any name mentioned
in .gitignore is ignored in all subdirectores.  This is good
for, say. object files (*.o), but not good for particular
names which should be ignored only in one directory.  For
example, qemu-img.1 file is generated in the top directory,
and it should be ignored only there, not in some subdir.

At first, this might not matter much, but we have lots of
examples already where it actually does not help at all.
For example, top-level .gitignore ignores a file/dir named
"patches" (which is very questionable by itself), but it
is applied recursively, so git also ignores, for example,
debian/patches/ which should not be ignored.

So anchor all the names where appropriate.  .gitignore
should be cleaned up further, which will be addressed in
a subsequent patch.
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

Over time, lots of stuff moved from vl.c into separate
files.  But include statements has never been cleaned,
and they continue to carry lots of anymore-unused stuff.

Remove includes which are not relevant for vl.c anymore.
Apparently there are more includes like this, because
many are included from qemu-common.h and the like, or,
for example, I don't see were we use win32-specific
stuff in vl.c (so that maybe #include <windows.h> might
be removed too).
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

The checksum calculation header exports a function that refers to
struct iov defined in iov.h.  Without including the former, build
fails like this:

  In file included from hw/net/fsl_etsec/rings.c:24:0:
  include/net/checksum.h:51:31: error: ‘struct iovec’ declared inside parameter list [-Werror]
  include/net/checksum.h:51:31: error: its scope is only this definition or declaration, which is probably not what you want [-Werror]

Mention struct iovec there.
Reported-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

Refactor do_socketcall() to do argument conversion/checking first,
according to a lookup table (which call has how many args) and
by calling the right function second with ready-to-go arguments.

This ensures that all arguments are handled as abi_long, according
to socketcall prototype, and simplifies argument handling alot too.
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>

Modify feature_not_found to accept an optional second parameter to be
printed after the generic feature not found error.

Modify most calls to feature_not_found to provide hints as to the
packages that may be missing. The few calls remaining without a remedy
are ones I couldn't work out how to remedy myself.
Signed-off-by: NStewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

Most distros package it as libfdt, and mentioning libfdt here makes it
much easier to find the package you're missing.
Signed-off-by: NStewart Smith <stewart@linux.vnet.ibm.com>
Reviewed-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

A lot of real world LEON3 systems are shipped with the GRMON boot
loader.  This boot loader initializes the stack pointer with the end of
RAM address.  The application can use this to detect the RAM size of a
particular board variant.
Signed-off-by: NSebastian Huber <sebastian.huber@embedded-brains.de>
Reviewed-by: NFabien Chouteau <chouteau@adacore.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

Signed-off-by: NStefan Weil <sw@weilnetz.de>
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Reviewed-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

Since we introduced node_name for named bs of the graph modify the opening by
reference to use it as a fallback.

This patch also enforce the separation of the device id and graph node
namespaces.
Signed-off-by: NBenoit Canet <benoit@irqsave.net>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

The following patch will reuse bdrv_lookup_bs in order to open images by
references so the rules of usage of bdrv_lookup_bs must be relaxed a bit.
Signed-off-by: NBenoit Canet <benoit@irqsave.net>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

As bdrv_open() documentation states:
"The reference to the QDict belongs to the block layer
 * after the call (even on failure), so if the caller intends to reuse the
 * dictionary, it needs to use QINCREF() before calling bdrv_open."

the optional options dict will not be reused after bdrv_open() and should
belong to the block layer so remove the extra QDECREF(options).
Signed-off-by: NBenoit Canet <benoit@irqsave.net>
Reviewed-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

When starting a block job, commit_active_start() relies on whether *errp
is set by mirror_start_job.  This allows it to determine if the mirror
job start failed, so that it can clean up any changes to open flags from
the bdrv_reopen().  If errp is NULL, then it will not be able to
determine if mirror_start_job failed or not.

To avoid this, use a local Error variable, and then propagate the error
(if any) to errp.
Reported-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NJeff Cody <jcody@redhat.com>
Reviewed-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

There would be too many extents that VMDK driver can't open all of them:

    005 0s ... - output mismatch (see 005.out.bad)
    --- 005.out     2013-12-24 09:27:27.608181030 +0800
    +++ 005.out.bad 2014-02-13 10:00:15.282184557 +0800
    @@ -4,10 +4,10 @@
     Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=5368709120000

     small read
    -read 4096/4096 bytes at offset 1024
    -4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
    +qemu-io: can't open device /tmp/qemu-iotests/t.vmdk: Could not open '/tmp/qemu-iotests/t-s1016.vmdk': Too many open files
    +no file open, try 'help open'

     small write
    -wrote 4096/4096 bytes at offset 8192
    -4 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
    +qemu-io: can't open device /tmp/qemu-iotests/t.vmdk: Could not open '/tmp/qemu-iotests/t-s1016.vmdk': Too many open files
    +no file open, try 'help open'
     *** done

So disable the two subformats.
Signed-off-by: NFam Zheng <famz@redhat.com>
Reviewed-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

VHDX logs can now be replayed via 'qemu-img check -r all'.  Add
tests to verify that the log replay is successful when using qemu-img.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

VHDX test 070 failed, due to different output from qemu-io / qemu
when opening an image read-only that contains a log file.  Filter
the output, and update the expected results to match the correct
output.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

There are a handful of places in the block layer where a failure path
has a valid -errno value, yet error_setg() is used.  Those instances
should instead use error_setg_errno(), to preserve as much error
information as possible.

This patch replaces those instances with error_setg_errno(), so that
errno is passed up the stack in the error message.
Reported-By: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NJeff Cody <jcody@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Reviewed-by: NFam Zheng <famz@redhat.com>
Reviewed-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

iSCSI currently does not need to do any actions to support the
current usage of bdrv_reopen().  However, it is important to note
a couple of things: 1.) A connection will not be re-established to
an iSCSI target, and 2.) If iscsi_open() is changed to parse 'flags',
then iscsi_reopen_prepare() may need to be more than a stub.

In light of the above, this commit adds comments above both of the
functions to bring attention to these facts.
Signed-off-by: NJeff Cody <jcody@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

blockdev-add doesn't know about the device that the backend will be
attached to, this is a legacy -drive concept. Move the remaining checks
that use it to drive_init().

[Fam Zheng <famz@redhat.com> suggested line-wrapping to 80 chars as
required by the coding standard.  I have fixed this.
--Stefan]
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NFam Zheng <famz@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

We now have to pass an address space to our _phys helpers. During the
transition apparently the EPR exit path missed out, so let's put it there.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

acpi,pc,pci fixes and enhancements

Most changes here are hotplug related:

This merges hotplug infrastructure changes by Igor,
some acpi related fixes, and PC fixes.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Mon 10 Feb 2014 09:13:26 GMT using RSA key ID D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream:
  ACPI: Remove commented-out code from HPET._CRS
  hw/pci: switch to a generic hotplug handling for PCIDevice
  pci/pcie: convert PCIE hotplug to use hotplug-handler API
  pci/shpc: convert SHPC hotplug to use hotplug-handler API
  acpi/piix4pm: convert ACPI PCI hotplug to use hotplug-handler API
  qdev:pci: refactor PCIDevice to use generic "hotpluggable" property
  hw/acpi: move typeinfo to the file end
  qdev: add "hotpluggable" property to Device
  qdev: add to BusState "hotplug-handler" link
  define hotplug interface
  loader: document that errno is set
  pc.c: better error message on initrd sizing failure
  pc_piix: enable legacy hotplug for Xen
  qtest: don't report signals if qtest driver enabled
  hw:piix4:acpi: reuse pcihp code for legacy PCI hotplug
  pcihp: remove unused AcpiPciHpPciStatus.device_present field
  pcihp: make pci_read() mmio calback compatible with legacy ACPI hotplug
  pcihp: make PCI hotplug mmio handlers indifferent to PCI_HOTPLUG_ADDR
  pcihp: replace enable|disable_device() with oneliners
  pcihp: reduce number of device check events
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

PReP machine and devices

* Cleanups for Raven PCI host bridge
* Removal of PReP machine and devices from qemu-system-ppcemb

# gpg: Signature made Mon 10 Feb 2014 16:19:03 GMT using RSA key ID 3E7E013F
# gpg: Good signature from "Andreas Färber <afaerber@suse.de>"
# gpg:                 aka "Andreas Färber <afaerber@suse.com>"

* remotes/afaerber/tags/prep-for-upstream:
  prep: Drop from ppcemb-softmmu
  raven: Use constant PCI_NUM_PINS instead of 4
  prep: Kill get_system_io() usage
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

* remotes/alon/pull-libcacard.glusterfs:
  libcacard: Don't link with all libraries QEMU links to
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Block patches

# gpg: Signature made Sun 09 Feb 2014 08:12:51 GMT using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"

* remotes/kevin/tags/for-anthony:
  block: Fix 32 bit truncation in mark_request_serialising()
  blkdebug: Don't leak bs->file on failure
  block: Don't call ROUND_UP with negative values
  block: bdrv_aligned_pwritev: Assert overlap range
  block: Fix memory leaks in bdrv_co_do_pwritev()
  raw: Fix BlockLimits passthrough
  qemu-iotests: add test for qcow2 preallocation with different cluster sizes
  qcow2: check for NULL l2meta
  qcow2: fix offset overflow in qcow2_alloc_clusters_at()
  qcow2: remove n_start and n_end of qcow2_alloc_cluster_offset()
  block/iscsi: always fill bs->bl.opt_transfer_length
  block: Fail gracefully with missing filename
  qemu-iotests: enable support for NFS protocol
  qemu-iotests: enable test 016 and 025 to work with NFS protocol
  qemu-iotests: blacklist test 020 for NFS protocol
  qemu-iotests: change _supported_proto to file for various tests
  block: add native support for NFS
  qemu-iotest: Make 077 raw-only
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

Signed-off-by: NRichard Henderson <rth@twiddle.net>
Acked-by: NJia Liu <proljc@gmail.com>
Signed-off-by: NJia Liu <proljc@gmail.com>