Blue Swirl [Sun, 25 Apr 2010 15:27:14 +0000 (15:27 +0000)]
Fix dead initialization, spotted by clang analyzer
Fix clang warnings:
/src/qemu/block/vvfat.c:1102:9: warning: Value stored to 'index3' during its initialization is never read
int index3=index1+1;
/src/qemu/cmd.c:290:15: warning: Value stored to 'p' during its initialization is never read
char *p = result;
Greatly simplify the subpage implementation by not supporting
multiple devices at the same address at different widths. We
don't need full copies of mem_read/mem_write/opaque for each
address, only a single index back into the main io_mem_* arrays.
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The ABI-specific types used by linux_binprm and image_info
are different after forcing TARGET_ABI32 on. Which means
that the parameters that load_elf_binary_multi sees are not
those that loader_exec passed. This is inherently broken
and is more trouble than it's worth fixing.
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Blue Swirl [Fri, 23 Apr 2010 19:22:22 +0000 (19:22 +0000)]
m68k: fix if statement with empty body, spotted by clang
Fix clang error:
CC m68k-softmmu/helper.o
/src/qemu/target-m68k/helper.c:773:33: error: if statement has empty body [-Wempty-body]
else if (val & (1ull << 47));
Blue Swirl [Fri, 23 Apr 2010 19:22:12 +0000 (19:22 +0000)]
Fix harmless if statement with empty body, spotted by clang
This clang error is harmless but worth fixing:
CC libhw32/rc4030.o
/src/qemu/hw/rc4030.c:244:66: error: if statement has empty body [-Wempty-body]
DPRINTF("read 0x%02x at " TARGET_FMT_plx "\n", val, addr);
Several commands have code to create a BlockDriverState and open a file.
The bdrv_new_open() function can be used to perform these steps. This
patch converts the qemu-img commands to actually use bdrv_new_open().
Replaced the bdrv_new_open() 'readonly' argument with bdrv_open()-style
flags to support generic flags like BDRV_O_NO_BACKING.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Stefan Hajnoczi [Fri, 9 Apr 2010 14:22:13 +0000 (15:22 +0100)]
block: Do not export bdrv_first
The bdrv_first linked list of BlockDriverStates is currently extern so
that block migration can iterate the list. However, since there is
already a bdrv_iterate() function there is no need to expose bdrv_first.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Split up the raw_getlength into separate generic, solaris and BSD
versions to reduce the ifdef maze a bit. The BSD variant still
is a complete maze, but to clean it up properly we'd need some
people using the BSD variants to figure out what code is used
for what variant.
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
BDRV_O_FILE is only used to communicate between bdrv_file_open and bdrv_open.
It affects two things: first bdrv_open only searches for protocols using
find_protocol instead of all image formats and host drivers. We can easily
move that to the caller and pass the found driver to bdrv_open. Second
it is used to not force a read-write open of a snapshot file. But we never
use bdrv_file_open to open snapshots and this behaviour doesn't make sense
to start with.
qemu-io abused the BDRV_O_FILE for it's growable option, switch it to
using bdrv_file_open to make sure we only open files as growable were
we can actually support that.
This patch requires Kevin's "[PATCH] Replace calls of old bdrv_open" to
be applied first.
Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Kevin Wolf [Wed, 31 Mar 2010 12:40:27 +0000 (14:40 +0200)]
Replace calls of old bdrv_open
What is known today as bdrv_open2 becomes the new bdrv_open. All remaining
callers of the old function are converted to the new one. In some places they
even know the right format, so they should have used bdrv_open2 from the
beginning.
Kevin Wolf [Fri, 26 Mar 2010 16:37:20 +0000 (17:37 +0100)]
qcow2: Fix creation of large images
qcow_create2 assumes that the new image will only need one cluster for its
refcount table initially. Obviously that's not true any more when the image is
big enough (exact value depends on the cluster size).
This patch calculates the refcount table size dynamically.
Kevin Wolf [Mon, 15 Mar 2010 16:27:00 +0000 (17:27 +0100)]
blkdebug: Add events and rules
Block drivers can trigger a blkdebug event whenever they reach a place where it
could be useful to inject an error for testing/debugging purposes.
Rules are read from a blkdebug config file and describe which action is taken
when an event is triggered. For now this is only injecting an error (with a few
options) or changing the state (which is an integer). Rules can be declared to
be active only in a specific state; this way later rules can distiguish on
which path we came to trigger their event.
Kevin Wolf [Mon, 15 Mar 2010 16:01:24 +0000 (17:01 +0100)]
Make qemu-config available for tools
To be able to use config files for blkdebug, we need to make these functions
available in the tools. This involves moving two functions that can only be
built in the context of the emulator.
Kevin Wolf [Fri, 5 Mar 2010 17:21:56 +0000 (18:21 +0100)]
qemu-config: Make qemu_config_parse more generic
qemu_config_parse gets the option groups as a parameter now instead of
hardcoding the VM configuration groups. This way it can be used for other
configurations, too.
Kevin Wolf [Fri, 5 Mar 2010 16:25:55 +0000 (17:25 +0100)]
qemu-config: qemu_read_config_file() reads the normal config file
Introduce a new function qemu_read_config_file which reads the VM configuration
from a config file. Unlike qemu_config_parse it doesn't take a open file but a
filename and reduces code duplication as a side effect.
Juha Riihimäki [Tue, 13 Apr 2010 06:16:55 +0000 (09:16 +0300)]
slirp: fix structure initialization in tcp_listen()
A data structure of type sockaddr_in is allocated from stack but not
properly initialized. This may lead to a failure in the bind() call
later on. Fixed by filling the contents of the structure with zeroes
before using it.
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Paolo Bonzini [Mon, 19 Apr 2010 18:59:30 +0000 (18:59 +0000)]
provide a stub version of kvm-all.c if !CONFIG_KVM
This allows limited use of kvm functions (which will return ENOSYS)
even in once-compiled modules. The patch also improves a bit the error
messages for KVM initialization.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[blauwirbel@gmail.com: fixed Win32 build] Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The beginning of the register allocation order list on the TCG arm
target matches the list of clobbered registers. This means that when an
helper is called, there is almost always clobbered registers that have
to be spilled.
On big endian targets, data arguments of qemu_ld/st ops have to be
byte swapped. Two temporary registers are needed for qemu_st to do
the bswap. r0 and r1 are used in system mode, do the same in user
mode, which implies reworking the constraints.
tcg/arm: remove conditional argument for qemu_ld/st
While it make sense to pass a conditional argument to tcg_out_*()
functions as the ARM architecture allows that, it doesn't make sense
for qemu_ld/st functions. These functions use comparison instructions
and conditional execution already, so it is not possible to use a
second level of conditional execution.
Add an bswap16 and bswap32 ops, either using the rev and rev16
instructions on ARMv6+ or shifts and logical operations on previous
ARM versions. In both cases the result use less instructions than
the pure TCG version.
These ops are also needed by the qemu_ld/st functions.
Add an ext16u op, either using the uxth instruction on ARMv6+ or two
shifts on previous ARM versions. In both cases the result use the same
number or less instructions than the pure TCG version.
Also move all sign extension code to separate functions, so that they
can be reused in other parts of the code.
There is no need to save the LR register (r14) before a call to a
subroutine. According to the "Procedure Call Standard for the ARM
Architecture", it is the job of the callee to save this register.
Moreover, this register is already saved in the prologue/epilogue.
This patch removes the disabled SAVE_LR code, as there is no need to
reenable later.
When qemu is invoked with an invalid initrd file, it crashes. Following
patch prints a error message and exits if an invalid initrd is
specified. Includes changes suggested by JV.
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
The conversion is shallow: client type init() methods aren't
converted. Converting them is a big job for relatively little
practical benefit, so leave it for later.
Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Ryan Harper [Thu, 25 Mar 2010 14:32:58 +0000 (09:32 -0500)]
Add qerror message if the 'change' target filename can't be opened
Currently when using the change command to switch the file in the cd drive
the command doesn't complain if the file doesn't exit or can't be opened
and the drive keeps the existing image. This patch adds a qerror_report
call to print a message out indicating the failure. This error message
can be used to catch failures.
With patch:
QEMU 0.12.50 monitor - type 'help' for more information
(qemu) change ide1-cd0 /tmp/non_existent_file.iso
Could not open '/tmp/non_existent_file.iso'
(qemu)
Signed-off-by: Ryan Harper <ryanh@us.ibm.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Blue Swirl [Sun, 18 Apr 2010 14:22:14 +0000 (14:22 +0000)]
kvm: avoid collision with dprintf macro in stdio.h, spotted by clang
Fixes clang errors:
CC i386-softmmu/kvm.o
/src/qemu/target-i386/kvm.c:40:9: error: 'dprintf' macro redefined
In file included from /src/qemu/target-i386/kvm.c:21:
In file included from /src/qemu/qemu-common.h:27:
In file included from /usr/include/stdio.h:910:
/usr/include/bits/stdio2.h:189:12: note: previous definition is here
CC i386-softmmu/kvm-all.o
/src/qemu/kvm-all.c:39:9: error: 'dprintf' macro redefined
In file included from /src/qemu/kvm-all.c:23:
In file included from /src/qemu/qemu-common.h:27:
In file included from /usr/include/stdio.h:910:
/usr/include/bits/stdio2.h:189:12: note: previous definition is here
Blue Swirl [Sun, 18 Apr 2010 14:22:14 +0000 (14:22 +0000)]
Fix harmless if statements with empty body, spotted by clang
These clang errors are harmless but worth fixing:
CC ppc-softmmu/usb-ohci.o
/src/qemu/hw/usb-ohci.c:1104:59: error: if statement has empty body [-Wempty-body]
ohci->ctrl_head, ohci->ctrl_cur);
/src/qemu/hw/usb-ohci.c:1371:57: error: if statement has empty body [-Wempty-body]
DPRINTF("usb-ohci: port %d: SUSPEND\n", portnum);
CC sparc64-softmmu/translate.o
/src/qemu/target-sparc/translate.c:3173:37: error: if statement has empty body [-Wempty-body]
; // XXX
Blue Swirl [Sun, 18 Apr 2010 08:45:03 +0000 (08:45 +0000)]
Fix harmless if statements with empty body, spotted by clang
These clang errors are harmless but worth fixing:
CC libhw64/fdc.o
/src/qemu/hw/fdc.c:998:74: error: if statement has empty body [-Wempty-body]
FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
CC libhw64/cuda.o
/src/qemu/hw/cuda.c:320:66: error: if statement has empty body [-Wempty-body]
CUDA_DPRINTF("read: reg=0x%x val=%02x\n", (int)addr, val);
There's a header file inclusion ordering problem between cpu-all.h
and qemu-timer.h, such that cpu_get_real_ticks is not defined when
we attempt to use it in profile_getclock.
Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Rather than creating new temporaries for constants, use the
ones created in disas_sparc_insn. Remember the temps created
there so that they can be freed at the end of the function.
Profile data collected by TCG while booting sparc-test kernel: