For handling guest POSIX timers, we currently use an array
g_posix_timers[], whose entries are a host timer_t value, or 0 for
"this slot is unused". When the guest calls the timer_create syscall
we look through the array for a slot containing 0, and use that for
the new timer.
This scheme assumes that host timer_t values can never be zero. This
is unfortunately not a valid assumption -- for some host libc
versions, timer_t values are simply indexes starting at 0. When
using this kind of host libc, the effect is that the first and second
timers end up sharing a slot, and so when the guest tries to operate
on the first timer it changes the second timer instead.
Rework the timer allocation code, so that:
* the 'slot in use' indication uses a separate array from the
host timer_t array
* we grab the free slot atomically, to avoid races when multiple
threads call timer_create simultaneously
* releasing an allocated slot is abstracted out into a new
free_host_timer_slot() function called in the correct places
This fixes:
* problems on hosts where timer_t 0 is valid
* the FIXME in next_free_host_timer() about locking
* bugs in the error paths in timer_create where we forgot to release
the slot we grabbed, or forgot to free the host timer
Reported-by: Jon Alduan <jon.alduan@gmail.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20220725110035.1273441-1-peter.maydell@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
We don't emulate a preemptive kernel on this level, and the hppa architecture
doesn't allow context switches on the gateway page. So we always have to return
to sc_iaoq[] and not to gr[31].
This fixes the remaining random segfaults which still occured.
Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <20220924114501.21767-8-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The hppa platform uses an upwards-growing stack and required in Linux
kernels < 5.18 an executable stack for signal processing. For that some
executables and libraries are marked to have an executable stack, for
which glibc uses the mprotect() syscall to mark the stack like this:
mprotect(xfa000000,4096,PROT_EXEC|PROT_READ|PROT_WRITE|PROT_GROWSUP).
Currently qemu will return -TARGET_EINVAL for this syscall because of the
checks in validate_prot_to_pageflags(), which doesn't allow the
PROT_GROWSUP or PROT_GROWSDOWN flags and thus triggers this error in the
guest:
error while loading shared libraries: libc.so.6: cannot enable executable stack as shared object requires: Invalid argument
Allow mprotect() to handle both flags and thus fix the guest.
The glibc tst-execstack testcase can be used to reproduce the issue.
Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <20220924114501.21767-7-deller@gmx.de>
[lvivier: s/elif TARGET_HPPA/elif defined(TARGET_HPPA)/]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The hppa target requires a much bigger stack than many other targets,
and the Linux kernel allocates 80 MB by default for it.
This patch increases the guest stack for hppa to 80MB, and prevents
that this default stack size gets reduced by a lower stack limit on the
host.
Since the stack grows upwards on hppa, the stack_limit value marks the
upper boundary of the stack. Fix the output of /proc/self/maps (in the
guest) to show the [stack] marker on the correct memory area.
Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <20220924114501.21767-6-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The stack-overflow check when building the "grep" debian package fails
on the debian hppa target. Reason is, that the guard page at the top
of the stack (which is added by qemu) prevents the fault handler in the
grep program to properly detect the stack overflow.
The Linux kernel on a physical machine doesn't install a guard page
either, so drop it and as such fix the build of "grep".
Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <20220924114501.21767-5-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
In Linux kernel v5.18 the vDSO for signal trampoline was added.
This code mimiks the bare minimum of this vDSO and thus avoids that the
parisc emulation needs executable stacks.
Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <20220924114501.21767-4-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This is a follow-up for commit 892a4f6a75 ("linux-user: Add partial
support for MADV_DONTNEED"), which added passthrough for anonymous
mappings. File mappings can be handled in a similar manner.
In order to do that, mark pages, for which mmap() was passed through,
with PAGE_PASSTHROUGH, and then allow madvise() passthrough for these
pages. Drop the explicit PAGE_ANON check, since anonymous mappings are
expected to have PAGE_PASSTHROUGH anyway.
Add PAGE_PASSTHROUGH to PAGE_STICKY in order to keep it on mprotect().
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220725125043.43048-1-iii@linux.ibm.com>
Message-Id: <20220906000839.1672934-5-iii@linux.ibm.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The default implementation has several problems: the first argument is
not displayed as a pointer, making it harder to grep; the third
argument is not symbolized; and there are several extra unused
arguments.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220906000839.1672934-4-iii@linux.ibm.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
On the parisc architecture the stack grows upwards.
Move the TASK_UNMAPPED_BASE to high memory area as it's done by the
kernel on physical machines.
Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <20220918194555.83535-9-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
If the mode parameter of chmod() is zero, this value isn't shown
when stracing a program:
chmod("filename",)
This patch fixes it up to show the zero-value as well:
chmod("filename",000)
Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220918194555.83535-8-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Enhance the EXCP_DUMP() macro to print out the failing program too.
During debugging it's sometimes hard to track down the actual failing
program if you are e.g. building a whole debian package.
Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220918194555.83535-5-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Allow linux-user to strace the clock_gettime64() syscall.
This syscall is used a lot on 32-bit guest architectures which use newer
glibc versions.
Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220918194555.83535-3-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Some of the guest signal numbers are currently not converted to
their representative names in the strace output, e.g. SIGVTALRM.
This patch introduces a smart way to generate and keep in sync the
host-to-guest and guest-to-host signal conversion tables for usage in
the qemu signal and strace code. This ensures that any signals
will now show up in both tables.
There is no functional change in this patch - with the exception that yet
missing signal names now show up in the strace code too.
Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220918194555.83535-2-deller@gmx.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The 'qemu64' CPU model implements the least featureful x86_64 CPU that's
possible. Historically this hasn't been an issue since it was rare for
OS distros to build with a higher mandatory CPU baseline.
With RHEL-9, however, the entire distro is built for the x86_64-v2 ABI
baseline:
https://developers.redhat.com/blog/2021/01/05/building-red-hat-enterprise-linux-9-for-the-x86-64-v2-microarchitecture-level
It is likely that other distros may take similar steps in the not too
distant future. For example, it has been suggested for Fedora on a
number of occasions.
This new baseline is not compatible with the qemu64 CPU model though.
While it is possible to pass a '-cpu xxx' flag to qemu-x86_64, the
usage of QEMU doesn't always allow for this. For example, the args
are typically controlled via binfmt rules that the user has no ability
to change. This impacts users who are trying to use podman on aarch64
platforms, to run containers with x86_64 content. There's no arg to
podman that can be used to change the qemu-x86_64 args, and a non-root
user of podman can not change binfmt rules without elevating privileges:
https://github.com/containers/podman/issues/15456#issuecomment-1228210973
Changing to the 'max' CPU model gives 'qemu-x86_64' maximum
compatibility with binaries it is likely to encounter in the wild,
and not likely to have a significant downside for existing usage.
Most other architectures already use an 'any' CPU model, which is
often mapped to 'max' (or similar) already, rather than the oldest
possible CPU model.
For the sake of consistency the 'i386' architecture is also changed
from using 'qemu32' to 'max'.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220923110413.70593-1-berrange@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Hexagon update
remove unused encodings
add fmin/fmax tests for signed zero
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# gpg: Signature made Mon 19 Sep 2022 14:57:54 EDT
# gpg: using RSA key 3635C788CE62B91FD4C59AB47B0244FB12DE4422
# gpg: Good signature from "Taylor Simpson (Rock on) <tsimpson@quicinc.com>" [unknown]
# 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: 3635 C788 CE62 B91F D4C5 9AB4 7B02 44FB 12DE 4422
* tag 'pull-hex-20220919' of https://github.com/quic/qemu:
Hexagon (tests/tcg/hexagon): add fmin/fmax tests for signed zero
Hexagon (target/hexagon) remove unused encodings
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
If the FDT contains /chosen/rng-seed, then the Linux RNG will use it to
initialize early. Set this using the usual guest random number
generation function. This FDT node is part of the DT specification.
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
ppc patch queue for 2022-09-20:
This queue contains a implementation of PowerISA 3.1B hash insns, ppc
TCG insns cleanups and fixes, and miscellaneus fixes in the spapr and
pnv_phb models.
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# gpg: Signature made Tue 20 Sep 2022 15:37:56 EDT
# gpg: using EDDSA key 17EBFF9923D01800AF2838193CD9CA96DE033164
# gpg: Good signature from "Daniel Henrique Barboza <danielhb413@gmail.com>" [unknown]
# 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: 17EB FF99 23D0 1800 AF28 3819 3CD9 CA96 DE03 3164
* tag 'pull-ppc-20220920' of https://gitlab.com/danielhb/qemu:
hw/ppc/spapr: Fix code style problems reported by checkpatch
hw/pci-host: pnv_phb{3, 4}: Fix heap out-of-bound access failure
hw/ppc: spapr: Use qemu_vfree() to free spapr->htab
target/ppc: Clear fpstatus flags on helpers missing it
target/ppc: Zero second doubleword of VSR registers for FPR insns
target/ppc: Set OV32 when OV is set
target/ppc: Zero second doubleword for VSX madd instructions
target/ppc: Set result to QNaN for DENBCD when VXCVI occurs
target/ppc: Zero second doubleword in DFP instructions
target/ppc: Remove unused xer_* macros
target/ppc: Remove extra space from s128 field in ppc_vsr_t
target/ppc: Merge fsqrt and fsqrts helpers
target/ppc: Move fsqrts to decodetree
target/ppc: Move fsqrt to decodetree
target/ppc: Implement hashstp and hashchkp
target/ppc: Implement hashst and hashchk
target/ppc: Add HASHKEYR and HASHPKEYR SPRs
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Testing and CI changes:
- reduce number of targets for cross_user_build
- update avocado xlnx_versal test with new binaries
- add explicit timeouts to a number of avocado TCG tests
- reduce default timeout to 120s
- update lcitool to support cross-amd64
- flatten a number of docker cross containers
- clean up stale qemu/debian10 dependencies
- remove obsolete Fedora VM test
- add configure workaround for meson --disable-pie bug
- disable --static-pie for aarch64 gitlab runner
- update aarch32/aarch64 jobs to 22.04
- deprecate 32 bit big-endian MIPS as a host
- remove FROM qemu/ support from docker.py
- remove Debian base images now everything is flat
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# gpg: Signature made Tue 20 Sep 2022 12:57:51 EDT
# gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [unknown]
# 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: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* tag 'pull-testing-next-200922-2' of https://github.com/stsquad/qemu: (30 commits)
tests/docker: remove the Debian base images
tests/docker: remove FROM qemu/ support from docker.py
tests/docker: update and flatten debian-toolchain
tests/docker: update and flatten debian-hexagon-cross
tests/docker: update and flatten debian-loongarch-cross
tests/docker: update and flatten debian-amd64-cross
tests/lcitool: bump to latest version
tests/docker: update and flatten debian-all-test-cross
tests/docker: flatten debian-riscv64-test-cross
Deprecate 32 bit big-endian MIPS
gitlab-ci: update aarch32/aarch64 custom runner jobs
gitlab-ci/custom-runners: Disable -static-pie for ubuntu-20.04-aarch64
configure: explicitly set cflags for --disable-pie
tests/vm: Remove obsolete Fedora VM test
tests/docker: remove amd64 qemu/debian10 dependency
tests/docker: remove tricore qemu/debian10 dependency
tests/docker: flatten debian-powerpc-test-cross
tests/docker: update and flatten debian-sparc64-cross
tests/docker: update and flatten debian-sh4-cross
tests/docker: update and flatten debian-mips64-cross
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
The M68K_FEATURE_M68000 feature is misleading in that its name suggests the feature
is defined just for Motorola 68000 CPUs, whilst in fact it is defined for all
Motorola 680X0 CPUs.
In order to avoid confusion with the other M68K_FEATURE_M680X0 constants which
define the features available for specific Motorola CPU models, rename
M68K_FEATURE_M68000 to M68K_FEATURE_M68K and add comments to clarify its usage.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220917112515.83905-2-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
* Skip tests if the corresponding feature is missing
* Update NetBSD VM test to version 9.3
* Update the FreeBSD CI to version 13.1
* Some small fixes for the qtests
* Update wordings in the QEMU guest-agent
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# gpg: Signature made Tue 20 Sep 2022 09:22:45 EDT
# gpg: using RSA key 27B88847EEE0250118F3EAB92ED9D774FE702DB5
# gpg: issuer "thuth@redhat.com"
# gpg: Good signature from "Thomas Huth <th.huth@gmx.de>" [full]
# gpg: aka "Thomas Huth <thuth@redhat.com>" [full]
# gpg: aka "Thomas Huth <huth@tuxfamily.org>" [full]
# gpg: aka "Thomas Huth <th.huth@posteo.de>" [unknown]
# Primary key fingerprint: 27B8 8847 EEE0 2501 18F3 EAB9 2ED9 D774 FE70 2DB5
* tag 'pull-request-2022-09-20' of https://gitlab.com/thuth/qemu:
qga: Replace 'blacklist' and 'whitelist' in the guest agent sources
qga: Replace 'blacklist' command line and config file options by 'block-rpcs'
gitlab-ci: Update the FreeBSD 13 job from 13.0 to 13.1
tests: sb16 has both pc and q35 tests
tests: Only run intel-hda-tests if machine type is compiled in
bios-tables-test: Only run test for machine types compiled in
bios-tables-test: Sort all x86_64 tests by machine type
bios-tables-test: Make oem-fields tests be consistent
meson-build: Enable CONFIG_REPLICATION only when replication is set
tests: Fix error strings
qtest/fuzz-lsi53c895a-test: set guest RAM to 2G
tests/qtest: npcm7xx-emc-test: Skip checking MAC
.gitlab-ci.d/windows.yml: Drop the sed processing in the 64-bit build
tests/vm: update NetBSD to 9.3
tests: mark io-command test as skipped if socat is missing
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Update to the latest stable Debian. While we are at it flatten into a
single dockerfile. We really don't need the rest of the stuff from the
QEMU base image just to compile test images. In this case it is a
binary distribution of the toolchain anyway.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220914155950.804707-27-alex.bennee@linaro.org>
We need this to be able to cleanly build the x86 cross images. There
are a few minor updates triggered by lcitool-refresh including adding
"libslirp" to the freebsd vars and opensuse-leap which will help when
we finally drop the slirp submodule from QEMU.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220914155950.804707-25-alex.bennee@linaro.org>
Update to the latest stable Debian. While we are at it flatten into a
single dockerfile. We also need to ensure we install clang as it is
used for those builds as well.
It would be nice to port this to lcitool but for now this will do.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220914155950.804707-24-alex.bennee@linaro.org>
Jiaxun Yang
Ilya Leoshkevich
Peter Maydell
fanwenjie
Helge Deller
Jameson Nash
Daniel P. Berrangé
Stefan Hajnoczi
Jason A. Donenfeld
Mark Cave-Ayland
Richard Henderson
Alex Bennée