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2012-05-19linux-user: Fix stale tbs after mmapAlexander Graf
If we execute linux-user code that does the following: * A = mmap() * execute code in A * munmap(A) * B = mmap(), but mmap returns the same address as A * execute code in B we end up executing a stale cached tb that contains translated code from A, while we want new code from B. This patch adds a TB flush for mmap'ed regions, before we return them, avoiding the whole issue. It also adds a flush for munmap, so that we don't execute stale TBs instead of getting a segfault. Reported-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Acked-by: Riku Voipio <riku.voipio@linaro.org> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-05-03linux-user: fix emulation of /proc/self/mapsAlexander Graf
Improve the emulation of /proc/self/maps by reading the underlying host maps file and passing lines through with addresses adjusted to be guest addresses. This is necessary to avoid false triggers of the glibc check that a format string containing '%n' is not in writable memory. (For an example see the bug reported in https://bugs.launchpad.net/qemu-linaro/+bug/947888 where gpg aborts.) Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-05-03linux-user: Clean up interim solution for exit syscallAndreas Färber
After all target CPUs have been QOM'ified, we no longer need an #ifdef to switch between object_delete() and g_free() in NPTL thread exit. Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-04-15linux-user: Fix exit syscall with QOM CPUAndreas Färber
For QOM'ified CPUs we cannot g_free() CPUArchState, we must object_delete() the object it is embedded into. Fixes LP#982321 (invalid free() while executing pacman with qemu-arm). Reported-by: Serge Schneider <serge@xecdesign.com> Reported-by: Russell Keith Davis <russell@russelldavis.org> Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Serge Schneider <serge@xecdesign.com> Tested-by: Russell Keith Davis <russell@russelldavis.org> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2012-04-06Userspace ARM BE8 supportPaul Brook
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>
2012-04-06arm-linux-user: fix elfload.c's AT_HWCAP to reflect cpu features.Benoit Canet
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>
2012-04-06linux-user/arm/syscall_nr.h: Add syscall number for ppollPeter Maydell
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>
2012-04-06linux-user: Add support for prctl PR_GET_NAME and PR_SET_NAMEPeter Maydell
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>
2012-04-06linux-user/syscall.c: Fix indentation in prctl handlingPeter Maydell
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>
2012-04-06linux-user: reserve 4GB of vmem for 32-on-64Alexander Graf
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>
2012-04-06linux-user: resolve reserved_va vma downwardsPeter Maydell
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>
2012-04-06linux-user: fix fallocateAlexander Graf
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>
2012-04-06linux-user: Add ioctl for BLKBSZGETAlexander Graf
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>
2012-04-06linux-user: add BLKSSZGET ioctl wrapperAlexander Graf
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>
2012-04-06linux-user: fix BLK ioctl argumentsAlexander Graf
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>
2012-04-06linux-user: add struct old_dev_t compatAlexander Graf
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>
2012-04-06linux-user: implement device mapper ioctlsAlexander Graf
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>
2012-04-06linux-user: target_argv is placed on ts->bprm->argv and can't be freed()Fabio Erculiani
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>
2012-04-06linux-user: improve fake /proc/self/stat making `ps` not segfault.Fabio Erculiani
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>
2012-03-15Bad zero comparison for sas_ss_flags on powerpcAlex Barcelo
All architectures work the same way, and all check for sas_ss_flags == 0. The powerpc lines are wrong, and do the check the other way round (it's a qemu internal check, which is done wrong only for this architecture, it's more a typo than a bug). It's NOT ppc specific, it's POSIX standard (sigaltstack) and qemu internal. I have a test source that I will send in a follow-up (it's longer than I would have wished, I'm sure that a better test case can be written if needed) Signed-off-by: Alex Barcelo <abarcelo@ac.upc.edu> Signed-off-by: Alexander Graf <agraf@suse.de>
2012-03-14Rename CPUState -> CPUArchStateAndreas Färber
Scripted conversion: for file in *.[hc] hw/*.[hc] hw/kvm/*.[hc] linux-user/*.[hc] linux-user/m68k/*.[hc] bsd-user/*.[hc] darwin-user/*.[hc] tcg/*/*.[hc] target-*/cpu.h; do sed -i "s/CPUState/CPUArchState/g" $file done All occurrences of CPUArchState are expected to be replaced by QOM CPUState, once all targets are QOM'ified and common fields have been extracted. Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2012-03-14linux-user: Don't overuse CPUStateAndreas Färber
In target-specific code use CPU*State. While at it, fix indentation on those lines. Signed-off-by: Andreas Färber <afaerber@suse.de>
2012-03-14Rename cpu_reset() to cpu_state_reset()Andreas Färber
Frees the identifier cpu_reset for QOM CPUs (manual rename). Don't hide the parameter type behind explicit casts, use static functions with strongly typed argument to indirect. Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2012-03-13qom: Add QOM support to user emulatorsAndreas Färber
Link the Object base class and the module infrastructure for class registration. Introduce $(universal-obj-y) for objects that are more common than $(common-obj-y), so that those only get built once. Call QOM module init for type registration. Signed-off-by: Andreas Färber <afaerber@suse.de> Cc: Anthony Liguori <anthony@codemonkey.ws> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-03-08Spelling fixes in comments (it's -> its)Stefan Weil
* it's -> its (fixed for all files) * dont -> don't (only fixed in a line which was touched by the previous fix) * distrub -> disturb (fixed in the same line) Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-02-10linux-user: brk() debuggingPaul Brook
Fix format type mismatches in do_brk debug printfs. Signed-off-by: Paul Brook <paul@codesourcery.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-02-10linux-user: fail execve() if env/args too bigUlrich Hecht
If the host's page size is equal to or smaller than the target's, native execve() will fail appropriately with E2BIG if called with too big an environment for the target to handle. It may falsely succeed, however, if the host's page size is bigger, and feed the executed target process an environment that is too big for it to handle, at which point QEMU barfs and exits, confusing procmail's autoconf script and causing the build to fail. This patch makes sure that execve() will return E2BIG if the environment is too large for the target. Signed-off-by: Ulrich Hecht <uli@suse.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2012-02-02linux-user: Fix sa_flags byte swaps for mipsAndreas Färber
sa_flags is uint32_t for mips{,n32,64}, so don't use tswapal(). edited by Riku Voipio: likewise on alpha Reported-by: Khansa Butt <khansa@kics.edu.pk> Suggested-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Andreas Färber <afaerber@suse.de> Cc: Ehsan Ul Haq <ehsan.ulhaq@kics.edu.pk> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: Define TARGET_QEMU_ESIGRETURN for mips64Andreas Färber
Copied from mips/syscall.h. Signed-off-by: Khansa Butt <khansa@kics.edu.pk> Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: Define TARGET_QEMU_ESIGRETURN for mipsn32Andreas Färber
Copied from mips/syscall.h. Signed-off-by: Ulrich Hecht <uli@suse.de> Signed-off-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: Implement *listxattr syscallsPeter Maydell
Implement listxattr, flistxattr and llistxattr syscalls. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user/syscall.c: Implement f and l versions of set/get/removexattrPeter Maydell
Implement the f and l versions (operate on fd, don't follow links) of the setxattr, getxattr and removexattr syscalls. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: Allow NULL value pointer in setxattr and getxattrPeter Maydell
It's valid to pass a NULL value pointer to setxattr, so don't fail this case EFAULT. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: fix wait* syscall status returnsAlexander Graf
When calling wait4 or waitpid with a status pointer and WNOHANG, the syscall can potentially not modify the status pointer input. Now if we have guest code like: int status = 0; waitpid(pid, &status, WNOHANG); if (status) <breakage> then we have to make sure that in case status did not change we actually return the guest's initialized status variable instead of our own uninitialized. We fail to do so today, as we proxy everything through an uninitialized status variable which for me ended up always containing the last error code. This patch fixes some test cases when building yast2-core in OBS for ARM. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user/strace.c: Correct errno printing for mmap etcPeter Maydell
Correct the printing of errnos for syscalls which are handled via print_syscall_ret_addr (mmap, mmap2, brk, shmat): errnos are returned as negative returned values at this level, not via the host 'errno' variable. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: fix QEMU_STRACE=1 segfaultAlexander Graf
While debugging some issues with QEMU_STRACE I stumbled over segmentation faults that were pretty reproducible. Turns out we tried to treat a normal return value as errno, resulting in an access over array boundaries for the resolution. Fix this by allowing failure to resolve invalid errnos into strings. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: add SO_PEERCRED support for getsockoptAkos PASZTORY
Signed-off-by: Akos PASZTORY <akos.pasztory@gmail.com> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user/main.c: Add option to user-mode emulation so that user can ↵陳韋任
specify log file name QEMU linux user-mode's default log file name is "/tmp/qemu.log". In order to change the log file name, user need to modify the source code then recompile QEMU. This patch allow user use "-D logfile" option to specify the log file name. Signed-off-by: Chen Wen-Ren <chenwj@iis.sinica.edu.tw> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: fake /proc/self/auxvAlexander Graf
Gtk tries to read /proc/self/auxv to find its auxv table instead of taking it from its own program memory space. However, when running with linux-user, we see the host's auxv which clearly exposes wrong information. so let's instead expose the guest memory backed auxv tables via /proc/self/auxv as well. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: fake /proc/self/statAlexander Graf
The boehm gc finds the program's stack starting pointer by checking /proc/self/stat. Unfortunately, so far it reads qemu's stack pointer which clearly is wrong. So let's instead fake the file so the guest program sees the right address. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: fake /proc/self/mapsAlexander Graf
glibc's pthread_attr_getstack tries to find the stack range from /proc/self/maps. Unfortunately, /proc is usually the host's /proc which means linux-user guests see qemu's stack there. Fake the file with a constructed maps entry that exposes the guest's stack range. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: add open() hijack infrastructureAlexander Graf
There are a number of files in /proc that expose host information to the guest program. This patch adds infrastructure to override the open() syscall for guest programs to enable us to on the fly generate guest sensible files. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-02-02linux-user: save auxv lengthAlexander Graf
We create our own AUXV segment on stack and save a pointer to it. However we don't save the length of it, so any code that wants to do anything useful with it later on has to walk it again. Instead, let's remember the length of our AUXV segment. This simplifies later uses by a lot. (edited by Riku to apply to qemu HEAD) Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
2012-02-02linux-user: stack_base is now mandatory on all targetsRiku Voipio
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2012-01-10elf: Improve symbol lookup (optimize, fix for bsd-user)Stefan Weil
Coverity complained about local variable key which was only partially initiated. Only key.st_value was set. As this was also the only part of key which was used in function symfind, the code could be optimized by directly passing a pointer to orig_addr. In bsd-user/elfload.c, fix ec822001a2f26eef8701194714f6482b6d852de2 was missing. This was a simple replacement of > by >= in symfind, so I fixed it here without creating an additional patch. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
2011-12-14Fix spelling in comments, documentation and messagesStefan Weil
accidently->accidentally annother->another choosen->chosen consideres->considers decriptor->descriptor developement->development paramter->parameter preceed->precede preceeding->preceding priviledge->privilege propogation->propagation substraction->subtraction throught->through upto->up to usefull->useful Fix also grammar in posix-aio-compat.c Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-12-06linux-user/syscall.c: Don't skip stracing for fcntl64 failure casePeter Maydell
In an fcntl64 failure path, we were returning directly rather than simply breaking out of the switch statement. This skips the strace code for printing the syscall return value, so don't do that. Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-12-06linux-user/arm/nwfpe/fpopcode.h: Fix non-UTF-8 charactersPeter Maydell
Fix some stray non-UTF-8 characters used in some ASCII art tables by converting them to plain ASCII '|' instead. Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-12-06linux-user/cpu-uname.c: Convert to UTF-8Peter Maydell
Convert comment from ISO-8859-1 encoding to UTF-8 to match the rest of QEMU's source code. Reviewed-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
2011-12-06fix typo: delete redundant semicolonDong Xu Wang
Double semicolons should be single. Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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