summaryrefslogtreecommitdiff
path: root/gdbstub.c
AgeCommit message (Collapse)Author
2017-01-27chardev: qom-ifyMarc-André Lureau
Turn Chardev into Object. qemu_chr_alloc() is replaced by the qemu_chardev_new() constructor. It will call qemu_char_open() to open/intialize the chardev with the ChardevCommon *backend settings. The CharDriver::create() callback is turned into a ChardevClass::open() which is called from the newly introduced qemu_chardev_open(). "chardev-gdb" and "chardev-hci" are internal chardev and aren't creatable directly with -chardev. Use a new internal flag to disable them. We may want to use TYPE_USER_CREATABLE interface instead, or perhaps allow -chardev usage. Although in general we keep typename and macros private, unless the type is being used by some other file, in this patch, all types and common helper macros for qemu-char.c are in char.h. This is to help transition now (some types must be declared early, while some aren't shared) and when splitting in several units. This is to be improved later. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-01-27char: rename CharDriverState ChardevMarc-André Lureau
Pick a uniform chardev type name. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-01-27char: allocate CharDriverState as a single objectMarc-André Lureau
Use a single allocation for CharDriverState, this avoids extra allocations & pointers, and is a step towards more object-oriented CharDriver. Gtk console is a bit peculiar, gd_vc_chr_set_echo() used to have a temporary VirtualConsole to save the echo bit. Instead now, we consider whether vcd->console is set or not, and restore the echo bit saved in VCDriverState when calling gd_vc_vte_init(). The casts added are temporary, they are replaced with QOM type-safe macros in a later patch in this series. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-01-27char: move callbacks in CharDriverMarc-André Lureau
This makes the code more declarative, and avoids duplicating the information on all instances. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-01-24gdbstub.c: update old error report statementsZiyue Yang
Some updates from fprintf(stderr, ...) to error_report. Signed-off-by: Ziyue Yang <skiver.cloud.yzy@gmail.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-01-24gdbstub.c: fix GDB connection segfault caused by empty machinesZiyue Yang
This patch is to fix the segmentation fault caused by attaching GDB to a QEMU instance initialized with "-M none" option. The bug can be reproduced by > ./qemu-system-x86_64 -M none -nographic -S -s and attach a GDB to it by > gdb -ex 'target remote :1234 The segmentation fault was originally caused by trying to read the information about CPU when communicating with GDB. However, it's impossible for any control flow to exist on an empty machine, nor can CPU's be hot plugged to an empty machine later by QOM commands. So I think simply disabling GDB connections on empty machines makes sense. Signed-off-by: Ziyue Yang <skiver.cloud.yzy@gmail.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-01-19kvm: move cpu synchronization codeVincent Palatin
Move the generic cpu_synchronize_ functions to the common hw_accel.h header, in order to prepare for the addition of a second hardware accelerator. Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Message-Id: <f5c3cffe8d520011df1c2e5437bb814989b48332.1484045952.git.vpalatin@chromium.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-10-28clean-up: removed duplicate #includesAnand J
Some files contain multiple #includes of the same header file. Removed most of those unnecessary duplicate entries using scripts/clean-includes. Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Anand J <anand.indukala@gmail.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2016-10-24char: remove explicit_fe_open, use a set_handlers argumentMarc-André Lureau
No need to keep explicit_fe_open around if it affects only a qemu_chr_fe_set_handlers(). Use an additional argument instead. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20161022095318.17775-24-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-10-24char: replace qemu_chr_claim/release with qemu_chr_fe_init/deinitMarc-André Lureau
Now that all front end use qemu_chr_fe_init(), we can move chardev claiming in init(), and add a function deinit() to release the chardev and cleanup handlers. The qemu_chr_fe_claim_no_fail() for property are gone, since the property will raise an error instead. In other cases, where there is already an error path, an error is raised instead. Finally, other cases are handled by &error_abort in qemu_chr_fe_init(). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20161022095318.17775-19-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-10-24char: use qemu_chr_fe* functions with CharBackend argumentMarc-André Lureau
This also switches from qemu_chr_add_handlers() to qemu_chr_fe_set_handlers(). Note that qemu_chr_fe_set_handlers() now takes the focus when fe_open (qemu_chr_add_handlers() did take the focus) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20161022095318.17775-16-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-10-24char: remaining switch to CharBackend in frontendMarc-André Lureau
Similar to previous change, for the remaining CharDriverState front ends users. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20161022095318.17775-13-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-10-24char: remove init callbackMarc-André Lureau
The CharDriverState.init() callback is no longer set since commit a61ae7f88ce and thus unused. The only user, the malta FGPA display has been converted to use an event "opened" callback instead. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20161022095318.17775-7-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-09-13hw: replace most use of qemu_chr_fe_write with qemu_chr_fe_write_allDaniel P. Berrange
The qemu_chr_fe_write method will return -1 on EAGAIN if the chardev backend write would block. Almost no callers of the qemu_chr_fe_write() method check the return value, instead blindly assuming data was successfully sent. In most cases this will lead to silent data loss on interactive consoles, but in some cases (eg RNG EGD) it'll just cause corruption of the protocol being spoken. We unfortunately can't fix the virtio-console code, due to a bug in the Linux guest drivers, which would cause the entire Linux kernel to hang if we delay processing of the incoming data in any way. Fixing this requires first fixing the guest driver to not hold spinlocks while writing to the hvc device backend. Fixes bug: https://bugs.launchpad.net/qemu/+bug/1586756 Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1473170165-540-4-git-send-email-berrange@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-06-08Merge remote-tracking branch 'remotes/riku/tags/pull-linux-user-20160608' ↵Peter Maydell
into staging linux-user pull request for June 2016 # gpg: Signature made Wed 08 Jun 2016 14:27:14 BST # gpg: using RSA key 0xB44890DEDE3C9BC0 # gpg: Good signature from "Riku Voipio <riku.voipio@iki.fi>" # gpg: aka "Riku Voipio <riku.voipio@linaro.org>" * remotes/riku/tags/pull-linux-user-20160608: (44 commits) linux-user: In fork_end(), remove correct CPUs from CPU list linux-user: Special-case ERESTARTSYS in target_strerror() linux-user: Make target_strerror() return 'const char *' linux-user: Correct signedness of target_flock l_start and l_len fields linux-user: Use safe_syscall wrapper for ioctl linux-user: Use safe_syscall wrapper for accept and accept4 syscalls linux-user: Use safe_syscall wrapper for semop linux-user: Use safe_syscall wrapper for epoll_wait syscalls linux-user: Use safe_syscall wrapper for poll and ppoll syscalls linux-user: Use safe_syscall wrapper for sleep syscalls linux-user: Use safe_syscall wrapper for rt_sigtimedwait syscall linux-user: Use safe_syscall wrapper for flock linux-user: Use safe_syscall wrapper for mq_timedsend and mq_timedreceive linux-user: Use safe_syscall wrapper for msgsnd and msgrcv linux-user: Use safe_syscall wrapper for send* and recv* syscalls linux-user: Use safe_syscall wrapper for connect syscall linux-user: Use safe_syscall wrapper for readv and writev syscalls linux-user: Fix error conversion in 64-bit fadvise syscall linux-user: Fix NR_fadvise64 and NR_fadvise64_64 for 32-bit guests linux-user: Fix handling of arm_fadvise64_64 syscall ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Conflicts: configure scripts/qemu-binfmt-conf.sh
2016-06-07gdbstub: set listen backlog to 1Peter Wu
Avoid possible connection drops on Linux (when tcp_syncookies is disabled) or fallbacks to SYN cookies with the following kernel warning: TCP: request_sock_TCP: Possible SYN flooding on port 1234. Sending cookies. Check SNMP counters. Since Linux 4.4 (ef547f2ac16b "tcp: remove max_qlen_log"), a backlog of zero is really treated as the "queue length for completely established sockets waiting to be accepted" (listen(2)). This is apparently a valid interpretation of an "implementation-defined minimum value" for a backlog value of 0 (listen(3p)). Previous kernels would use 8 as minimum value, but that is no longer the case. Signed-off-by: Peter Wu <peter@lekensteyn.nl> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2016-06-07linux-user: Remove redundant gdb_queuesig()Timothy E Baldwin
Signed-off-by: Timothy Edward Baldwin <T.E.Baldwin99@members.leeds.ac.uk> Message-id: 1441497448-32489-22-git-send-email-T.E.Baldwin99@members.leeds.ac.uk Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
2016-06-06gdbstub: avoid busy loop while waiting for gdbPeter Wu
While waiting for a gdb response, or while sending an acknowledgement there is not much to do, so do not mark the socket as non-blocking to avoid a busy loop while paused at gdb. This only affects the user-mode emulation (qemu-arm -g 1234 ./a.out). Note that this issue was reported before at https://lists.nongnu.org/archive/html/qemu-devel/2013-02/msg02277.html. While at it, close the gdb client fd on EOF or error while reading. Signed-off-by: Peter Wu <peter@lekensteyn.nl> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-05-19cpu: move exec-all.h inclusion out of cpu.hPaolo Bonzini
exec-all.h contains TCG-specific definitions. It is not needed outside TCG-specific files such as translate.c, exec.c or *helper.c. One generic function had snuck into include/exec/exec-all.h; move it to include/qom/cpu.h. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-19qemu-common: push cpu.h inclusion out of qemu-common.hPaolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-22util: move declarations out of qemu-common.hVeronia Bahaa
Move declarations out of qemu-common.h for functions declared in utils/ files: e.g. include/qemu/path.h for utils/path.c. Move inline functions out of qemu-common.h and into new files (e.g. include/qemu/bcd.h) Signed-off-by: Veronia Bahaa <veroniabahaa@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-22include/qemu/osdep.h: Don't include qapi/error.hMarkus Armbruster
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the Error typedef. Since then, we've moved to include qemu/osdep.h everywhere. Its file comment explains: "To avoid getting into possible circular include dependencies, this file should not include any other QEMU headers, with the exceptions of config-host.h, compiler.h, os-posix.h and os-win32.h, all of which are doing a similar job to this file and are under similar constraints." qapi/error.h doesn't do a similar job, and it doesn't adhere to similar constraints: it includes qapi-types.h. That's in excess of 100KiB of crap most .c files don't actually need. Add the typedef to qemu/typedefs.h, and include that instead of qapi/error.h. Include qapi/error.h in .c files that need it and don't get it now. Include qapi-types.h in qom/object.h for uint16List. Update scripts/clean-includes accordingly. Update it further to match reality: replace config.h by config-target.h, add sysemu/os-posix.h, sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h comment quoted above similarly. This reduces the number of objects depending on qapi/error.h from "all of them" to less than a third. Unfortunately, the number depending on qapi-types.h shrinks only a little. More work is needed for that one. Signed-off-by: Markus Armbruster <armbru@redhat.com> [Fix compilation without the spice devel packages. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-15replay: character devicesPavel Dovgalyuk
This patch implements record and replay of character devices. It records chardevs communication in replay mode. Recorded information include data read from backend and counter of bytes written from frontend to backend to preserve frontend internal state. If character device was configured through the command line in record mode, then in replay mode it should be also added to command line. Backend of the character device could be changed in replay mode. Replaying of devices that perform ioctl and get_msgfd operations is not supported. gdbstub which also acts as a backend is not recorded to allow controlling the replaying through gdb. Monitor backends are also not recorded. Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru> Message-Id: <20160314074436.4980.83856.stgit@PASHA-ISP> [Add stubs. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-04all: Clean up includesPeter Maydell
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1454089805-5470-16-git-send-email-peter.maydell@linaro.org
2016-01-27gdb: provide the name of the architecture in the target.xmlDavid Hildenbrand
This patch provides the name of the architecture in the target.xml if available. This allows the remote gdb to detect the target architecture on its own - so there is no need to specify it manually (e.g. if gdb is started without a binary) using "set arch *arch_name*". The name of the architecture is provided by a callback that can be implemented by all architectures. The arm implementation has special handling for iwmmxt and returns arm otherwise. This can be extended if necessary. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> [rework to use a callback] Message-Id: <1449144881-130935-1-git-send-email-borntraeger@de.ibm.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2016-01-15qemu-char: add logfile facility to all chardev backendsDaniel P. Berrange
Typically a UNIX guest OS will log boot messages to a serial port in addition to any graphical console. An admin user may also wish to use the serial port for an interactive console. A virtualization management system may wish to collect system boot messages by logging the serial port, but also wish to allow admins interactive access. Currently providing such a feature forces the mgmt app to either provide 2 separate serial ports, one for logging boot messages and one for interactive console login, or to proxy all output via a separate service that can multiplex the two needs onto one serial port. While both are valid approaches, they each have their own downsides. The former causes confusion and extra setup work for VM admins creating disk images. The latter places an extra burden to re-implement much of the QEMU chardev backends logic in libvirt or even higher level mgmt apps and adds extra hops in the data transfer path. A simpler approach that is satisfactory for many use cases is to allow the QEMU chardev backends to have a "logfile" property associated with them. $QEMU -chardev socket,host=localhost,port=9000,\ server=on,nowait,id-charserial0,\ logfile=/var/log/libvirt/qemu/test-serial0.log -device isa-serial,chardev=charserial0,id=serial0 This patch introduces a 'ChardevCommon' struct which is setup as a base for all the ChardevBackend types. Ideally this would be registered directly as a base against ChardevBackend, rather than each type, but the QAPI generator doesn't allow that since the ChardevBackend is a non-discriminated union. The ChardevCommon struct provides the optional 'logfile' parameter, as well as 'logappend' which controls whether QEMU truncates or appends (default truncate). Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1452516281-27519-1-git-send-email-berrange@redhat.com> [Call qemu_chr_parse_common if cd->parse is NULL. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-11-06gdbstub: Fix buffer overflows in gdb_handle_packet()Kevin Wolf
Some places in gdb_handle_packet() can get an arbitrary length (most times directly from the client) and either didn't check it at all or checked against the wrong value, potentially causing buffer overflows. Cc: qemu-stable@nongnu.org Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-09-14Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into stagingPeter Maydell
* Support for jemalloc * qemu_mutex_lock_iothread "No such process" fix * cutils: qemu_strto* wrappers * iohandler.c simplification * Many other fixes and misc patches. And some MTTCG work (with Emilio's fixes squashed): * Signal-free TCG kick * Removing spinlock in favor of QemuMutex * User-mode emulation multi-threading fixes/docs # gpg: Signature made Thu 10 Sep 2015 09:03:07 BST using RSA key ID 78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" * remotes/bonzini/tags/for-upstream: (44 commits) cutils: work around platform differences in strto{l,ul,ll,ull} cpu-exec: fix lock hierarchy for user-mode emulation exec: make mmap_lock/mmap_unlock globally available tcg: comment on which functions have to be called with mmap_lock held tcg: add memory barriers in page_find_alloc accesses remove unused spinlock. replace spinlock by QemuMutex. cpus: remove tcg_halt_cond and tcg_cpu_thread globals cpus: protect work list with work_mutex scripts/dump-guest-memory.py: fix after RAMBlock change configure: Add support for jemalloc add macro file for coccinelle configure: factor out adding disas configure vhost-scsi: fix wrong vhost-scsi firmware path checkpatch: remove tests that are not relevant outside the kernel checkpatch: adapt some tests to QEMU CODING_STYLE: update mixed declaration rules qmp: Add example usage of strto*l() qemu wrapper cutils: Add qemu_strtoull() wrapper cutils: Add qemu_strtoll() wrapper ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-09-09use qemu_cpu_kick instead of cpu_exit or qemu_cpu_kick_threadPaolo Bonzini
Use the same API to trigger interruption of a CPU, no matter if under TCG or KVM. There is no difference: these calls come from the CPU thread, so the qemu_cpu_kick calls will send a signal to the running thread and it will be processed synchronously, just like a call to cpu_exit. The only difference is in the overhead, but neither call to cpu_exit (now qemu_cpu_kick) is in a hot path. Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-09-07gdbstub: Implement gdb_do_syscallv()Peter Maydell
Implement a variant of the existing gdb_do_syscall() which takes a va_list. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Tested-by: Christopher Covington <cov@codeaurora.org> Message-id: 1439483745-28752-4-git-send-email-peter.maydell@linaro.org
2015-07-27gdbstub: Set current CPU on interruptionsJan Kiszka
gdb expects that the thread ID for c and g-class operations is set to the CPU we provide when reporting VM stop conditions. If the stub is still tuned to a different CPU, the wrong information is delivered to the gdb frontend. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-07-09gdbstub: Use cpu_set_pc() helperPeter Crosthwaite
Use the cpu_set_pc() helper which will take care of CPUClass retrieval for us. Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2015-07-09gdbstub: Change gdbserver_fork() to accept cpu instead of envPeter Crosthwaite
All callsites to this function navigate the cpu->env_ptr only for the function to take the env ptr back to the original cpu ptr. Change the function to just pass in the CPU pointer instead. Removes a core code usage of ENV_GET_CPU() (in gdbstub.c). Cc: Riku Voipio <riku.voipio@iki.fi> Reviewed-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2015-07-09translate-all: Change tb_flush() env argument to cpuPeter Crosthwaite
All of the core-code usages of this API have the cpu pointer handy so pass it in. There are only 3 architecture specific usages (2 of which are commented out) which can just use ENV_GET_CPU() locally to get the cpu pointer. The reduces core code usage of the CPU env, which brings us closer to common-obj'ing these core files. Cc: Riku Voipio <riku.voipio@iki.fi> Cc: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Acked-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2015-06-19semihosting: create SemihostingConfig structure and semihost.hLeon Alrae
Remove semihosting_enabled and semihosting_target and replace them with SemihostingConfig structure containing equivalent fields. The structure is defined in vl.c where it is actually set. Also introduce separate header file include/exec/semihost.h allowing to access semihosting config related stuff from target specific semihosting code. Signed-off-by: Leon Alrae <leon.alrae@imgtec.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1434643256-16858-2-git-send-email-leon.alrae@imgtec.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-05-28Revert "gdbstub: Do not kill target in system emulation mode"Fabien Chouteau
The requirements described in this patch are implemented by "Add GDB qAttached support". This reverts commit 00e94dbc7fd0110b0555d59592b004333adfb4b8. Signed-off-by: Fabien Chouteau <chouteau@adacore.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-05-28Add GDB qAttached supportJan Kiszka
With this patch QEMU handles qAttached request from gdb. When QEMU replies 1, GDB sends a "detach" command at the end of a debugging session otherwise GDB sends "kill". The default value for qAttached is 1 on system emulation and 0 on user emulation. Based on original version by Fabien Chouteau. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-05-28gdbstub: Introduce an is is_query_packet helperJan Kiszka
This helper supports parsing of query packets with optional extensions. The separator can be specified so that we can use it already for both qqemu.sstep[=] and qSupported[:feature]. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-05-28gdbstub: Fix qOffsets packet detectionJan Kiszka
qOffsets has no additional optional parameters. So match the complete string to avoid stumbling over possible future commands with identical prefix. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-03-10gdbstub: avoid possible NULL pointer dereferencePaolo Bonzini
Coverity reports that s->chr is checked after put_packet dereferences it. Move the check earlier, consistent with the code used for user-mode emulation. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-12-11Add the "-semihosting-config" option.Liviu Ionescu
The usual semihosting behaviour is to process the system calls locally and return; unfortuantelly the initial implementation dinamically changed the target to GDB during debug sessions, which, for the usual arm-none-eabi-gdb, is not implemented. The result was that during debug sessions the semihosting calls were discarded. This patch adds a configuration variable and an option to set it on the command line: -semihosting-config [enable=on|off,]target=native|gdb|auto This option enables semihosting and defines where the semihosting calls will be addressed, to QEMU ('native') or to GDB ('gdb'). The default is auto, which means 'gdb' during debug sessions and 'native' otherwise. Signed-off-by: Liviu Ionescu <ilg@livius.net> Message-id: 1416341957-9796-1-git-send-email-ilg@livius.net [PMM: moved declaration and definition of semihosting_target to gdbstub.h and gdbstub.c to fix build failure on linux-user] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-11-11gdbstub: Add a missing case of signal number translation in gdbstubMartin Simmons
While using qemu with gdb "target remote" to debug an application that uses fork and exec, the qemu process receives SIGSTOP every time the forked process terminates (sending SIGCHLD). This is caused by a missing call to gdb_signal_to_target in gdbstub.c, which is fixed by this patch: Signed-off-by: Martin Simmons <martin@lispworks.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2014-10-06gdbstub: Allow target CPUs to specify watchpoint STOP_BEFORE_ACCESS flagPeter Maydell
GDB assumes that watchpoint set via the gdbstub remote protocol will behave in the same way as hardware watchpoints for the target. In particular, whether the CPU stops with the PC before or after the insn which triggers the watchpoint is target dependent. Allow guest CPU code to specify which behaviour to use. This fixes a bug where with guest CPUs which stop before the accessing insn GDB would manually step forward over what it thought was the insn and end up one insn further forward than it should be. We set this flag for the CPU architectures which set gdbarch_have_nonsteppable_watchpoint in gdb 7.7: ARM, CRIS, LM32, MIPS and Xtensa. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Tested-by: Max Filippov <jcmvbkbc@gmail.com> Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Tested-by: Michael Walle <michael@walle.cc> (for lm32) Message-id: 1410545057-14014-1-git-send-email-peter.maydell@linaro.org
2014-09-11gdbstub: init mon_chr through qemu_chr_allocPavel Dovgalyuk
This patch initializes monitor for gdbstub with the qemu_chr_alloc function instead of just allocating the memory. Initialization function call is required, because it also creates chr_write_lock mutex, which is used when writing to this character device. Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru> Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-03-13exec: Change cpu_breakpoint_{insert,remove{,_by_ref,_all}} argumentAndreas Färber
Use CPUState. Allows to clean up CPUArchState in gdbstub. Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13exec: Change cpu_watchpoint_{insert,remove{,_by_ref,_all}} argumentAndreas Färber
Use CPUState. This lets us drop a few local env usages. Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13cpu: Move watchpoint fields from CPU_COMMON to CPUStateAndreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13cpu: Move opaque field from CPU_COMMON to CPUStateAndreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-11-04vl: allow "cont" from panicked statePaolo Bonzini
After reporting the GUEST_PANICKED monitor event, QEMU stops the VM. The reason for this is that events are edge-triggered, and can be lost if management dies at the wrong time. Stopping a panicked VM lets management know of a panic even if it has crashed; management can learn about the panic when it restarts and queries running QEMU processes. The downside is of course that the VM will be paused while management is not running, but that is acceptable if it only happens with explicit "-device pvpanic". Upon learning of a panic, management (if configured to do so) can pick a variety of behaviors: leave the VM paused, reset it, destroy it. In addition to all of these behaviors, it is possible to dump the VM core from the host. However, right now, the panicked state is irreversible, and can only be exited by resetting the machine. This means that any policy decision is entirely in the hands of the host. In particular there is no way to use the "reboot on panic" option together with pvpanic. This patch makes the panicked state reversible (and removes various workarounds that were there because of the state being irreversible). With this change, management has a wider set of possible policies: it can just log the crash and leave policy to the guest, it can leave the VM paused. In particular, the "log the crash and continue" is implemented simply by sending a "cont" as soon as management learns about the panic. Management could also implement the "irreversible paused state" itself. And again, all such actions can be coupled with dumping the VM core. Unfortunately we cannot change the behavior of 1.6.0. Thus, even if it uses "-device pvpanic", management should check for "cont" failures. If "cont" fails, management can then log that the VM remained paused and urge the administrator to update QEMU. Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-10-02gdbstub: call socket_set_fast_reuse instead of setting SO_REUSEADDRSebastian Ottlik
SO_REUSEADDR should be avoided on Windows but is desired on other operating systems. So instead of setting it we call socket_set_fast_reuse that will result in the appropriate behaviour on all operating systems. Signed-off-by: Sebastian Ottlik <ottlik@fzi.de> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Weil <sw@weilnetz.de>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 20:20:44 +0000