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2022-04-06Replace TARGET_WORDS_BIGENDIANMarc-André Lureau
Convert the TARGET_WORDS_BIGENDIAN macro, similarly to what was done with HOST_BIG_ENDIAN. The new TARGET_BIG_ENDIAN macro is either 0 or 1, and thus should always be defined to prevent misuse. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Suggested-by: Halil Pasic <pasic@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220323155743.1585078-8-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-03-22Replace GCC_FMT_ATTR with G_GNUC_PRINTFMarc-André Lureau
One less qemu-specific macro. It also helps to make some headers/units only depend on glib, and thus moved in standalone projects eventually. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
2022-02-26bsd-user: Define target_arg64Warner Losh
target_arg64 is a generic way to extract 64-bits from a pair of arguments. On 32-bit platforms, it returns them joined together as appropriate. On 64-bit platforms, it returns the first arg because it's already 64-bits. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Kyle Evans <kevans@FreeBSD.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-02-26bsd-user: introduce target.hWarner Losh
Create target.h. This file is intended to be simple and describe basic things about the architecture. If something is a basic feature of the architecture, it belongs here. Should we need something that's per-BSD there will be a target-os.h that will live in the per-bsd directories. Define regpairs_aligned to reflect whether or not registers are 'paired' for 64-bit arguments or not. This will be false for all 64-bit targets, and will be true on those architectures that pair (currently just armv7 and powerpc on FreeBSD 14.x). Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Kyle Evans <kevans@FreeBSD.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-02-26bsd-user/freebsd/os-syscall.c: Add get_errno and host_to_target_errnoWarner Losh
Add the helper functions get_errno and host_to_target_errno. get_errno returns either the system call results, or the -errno when system call indicates failure by returning -1. Host_to_target_errno returns errno (since on FreeBSD they are the same on all architectures) along with a comment about why it's the identity. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Kyle Evans <kevans@FreeBSD.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-02-26bsd-user: Remove bsd_typeWarner Losh
Remove keeping track of which type of bsd we're running on. It's no longer referenced in the code. Building bsd-user on NetBSD or OpenBSD isn't possible, let alone running that code. Stop pretending that we can do the cross BSD thing since there's been a large divergence since 2000 that makes this nearly impossible between FreeBSD and {Net,Open}BSD and at least quite difficult between NetBSD and OpenBSD. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Kyle Evans <kevans@FreeBSD.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-01-28bsd-user/signal.c: handle_pending_signalWarner Losh
Handle a queued signal. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Kyle Evans <kevans@freebsd.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-01-28bsd-user/signal.c: setup_frameWarner Losh
setup_frame sets up a signalled stack frame. Associated routines to extract the pointer to the stack frame and to support alternate stacks. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Kyle Evans <kevans@freebsd.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-01-28bsd-user/signal.c: Fill in queue_signalWarner Losh
Fill in queue signal implementation, as well as routines allocate and delete elements of the signal queue. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Kyle Evans <kevans@freebsd.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-01-28bsd-user/strace.c: print_taken_signalWarner Losh
print_taken_signal() prints signals when we're tracing signals. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Kyle Evans <kevans@freebsd.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-01-28bsd-user/signal.c: Implement rewind_if_in_safe_syscallWarner Losh
Signed-off-by: Kyle Evans <kevans@freebsd.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-01-28bsd-user/signal.c: Implement signal_init()Warner Losh
Initialize the signal state for the emulator. Setup a set of sane default signal handlers, mirroring the host's signals. For fatal signals (those that exit by default), establish our own set of signal handlers. Stub out the actual signal handler we use for the moment. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Kyle Evans <kevans@freebsd.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> XXX SIGPROF PENDING
2022-01-28bsd-user/signal-common.h: Move signal functions prototypes to hereWarner Losh
Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-01-28bsd-user: Bring in docs from linux-user for signal_pendingWarner Losh
This is currently unused, so no code adjustments are needed. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2022-01-28bsd-user: Remove vestiges of signal queueing codeWarner Losh
bsd-user was copied from linux-user at a time when it queued signals. Remove those vestiges of thse code. Retain the init function, even though it's now empty since other stuff will likely be added there. Make it static since it's not called from outside of main.c Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2021-10-18bsd-user/signal: Create a dummy signal queueing functionWarner Losh
Create dummy signal queueing function so we can start to integrate other architectures (at the cost of signals remaining broken) to tame the dependency graph a bit and to bring in signals in a more controlled fashion. Log unimplemented events to it in the mean time. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
2021-10-18bsd-user: Rename sigqueue to qemu_sigqueueWarner Losh
To avoid a name clash with FreeBSD's sigqueue data structure in signalvar.h, rename sigqueue to qemu_sigqueue. This structure is currently defined, but unused. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
2021-10-18bsd-user/sysarch: Move to using do_freebsd_arch_sysarch interfaceWarner Losh
do_freebsd_arch_sysarch() exists in $ARCH/target_arch_sysarch.h for x86. Call it from do_freebsd_sysarch() and remove the mostly duplicate version in syscall.c. Future changes will move it to os-sys.c and support other architectures. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
2021-10-18bsd-user: Add stop_all_tasksWarner Losh
Similar to the same function in linux-user: this stops all the current tasks. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
2021-10-18bsd-user: Remove used from TaskStateWarner Losh
The 'used' field in TaskState is write only. Remove it from TaskState. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
2021-10-18bsd-user: export get_errno and is_error from syscall.cWarner Losh
Make get_errno and is_error global so files other than syscall.c can use them. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
2021-09-10bsd-user: Update mapping to handle reserved and starting conditionsWarner Losh
Update the reserved base based on what platform we're on, as well as the start of the mmap range. Update routines that find va ranges to interact with the reserved ranges as well as properly align the mapping (this is especially important for targets whose page size does not match the host's). Loop where appropriate when the initial address space offered by mmap does not meet the contraints. This has 18e80c55bb6 from linux-user folded in to the upstream bsd-user code as well. Signed-off-by: Mikaël Urankar <mikael.urankar@gmail.com> Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Acked-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
2021-09-10bsd-user: add stubbed out core dump supportWarner Losh
Add a stubbed-out version of the bsd-user fork's core dump support. This allows elfload.c to be almost the same between what's upstream and what's in qemu-project upstream w/o the burden of reviewing the core dump support. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2021-09-10bsd-user: elf cleanupWarner Losh
Move OS-dependent defines into target_os_elf.h. Move the architectural dependent stuff into target_arch_elf.h. Adjust elfload.c to use target_create_elf_tables instead of create_elf_tables. Signed-off-by: Warner Losh <imp@bsdimp.com> Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Kyle Evans <kevans@FreeBSD.org> Signed-off-by: Justin Hibbits <chmeeedalf@gmail.com> Signed-off-by: Alexander Kabaev <kan@FreeBSD.ORG> Acked-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
2021-09-10bsd-user: *BSD specific siginfo defintionsWarner Losh
Add FreeBSD, NetBSD and OpenBSD values for the various signal info types and defines to decode different signals to discover more information about the specific signal types. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Acked-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
2021-09-10bsd-user: Add system independent stack, data and text limitingWarner Losh
Eliminate the x86 specific stack stuff in favor of more generic control over the process size: target_maxtsiz max text size target_dfldsiz initial data size limit target_maxdsiz max data size target_dflssiz initial stack size limit target_maxssiz max stack size target_sgrowsiz amount to grow stack These can be set on a per-arch basis, and the stack size can be set on the command line. Adjust the stack size parameters at startup. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2021-09-10bsd-user: Create target specific vmparam.hWarner Losh
Target specific values for vm parameters and details. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2021-09-10bsd-user: define max args in terms of pagesWarner Losh
For 32-bit platforms, pass in up to 256k of args. For 64-bit, bump that to 512k. Signed-off-by: Kyle Evans <kevans@freebsd.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2021-09-10bsd-user: Include more things in qemu.hWarner Losh
Include more header files to match bsd-user fork. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2021-09-10bsd-user: Move per-cpu code into target_arch_cpu.hWarner Losh
Move cpu_loop() into target_cpu_loop(), and put that in target_arch_cpu.h for each architecture. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2021-09-10bsd-user: save the path to the qemu emulatorWarner Losh
Save the path to the qemu emulator. This will be used later when we have a more complete implementation of exec. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Acked-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
2021-09-10bsd-user: assume pthreads and support of __threadWarner Losh
All compilers for some time have supported this. Follow linux-user and eliminate the #define THREAD and unconditionally insert __thread where needed. Please insert: "(see 24cb36a61c6: "configure: Make NPTL non-optional")" Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2021-09-10bsd-user: remove a.out supportWarner Losh
Remove still-born a.out support. The BSDs switched from a.out to ELF 20+ years ago. It's out of scope for bsd-user, and what little support there was would simply wind up at a not-implemented message. Simplify the whole mess by removing it entirely. Should future support be required, it would be better to start from scratch. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2021-09-10bsd-user: Eliminate elf personalityWarner Losh
The linux kernel supports a number of different ELF binaries. The Linux userland emulator inheritted some of that. And we inheritted it from there. However, for BSD there's only one kind of ELF file supported per platform, so there's no need to cope with historical quirks. Simply the code as a result. Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2021-09-10bsd-user: implement path searchingWarner Losh
Use the PATH to find the executable given a bare argument. We need to do this so we can implement mixing native and emulated binaries (e.g., execing a x86 native binary from an emulated arm binary to optimize parts of the build). By finding the binary, we will know how to exec it. Signed-off-by: Stacey Son <sson@FreeBSD.org> Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2021-09-10bsd-user: pass the bsd_param into loader_execWarner Losh
Pass the bsd_param into loader_exec, and adjust. We use it to track the inital stack allocation and to set stack, open files, and other state shared between bsdload.c and elfload.c Signed-off-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2021-05-11bsd-user: rename linux_binprm to bsd_binprmWarner Losh
Rename linux_binprm to bsd_binprm to reflect that we're loading BSD binaries, not ELF ones. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Warner Losh <imp@bsdimp.com>
2021-05-11bsd-user: remove target_signal.h, it's unusedWarner Losh
Remove the target_signal.h file. None of its contents are currently used and the bsd-user fork doesn't use them (so this reduces the diffs there). Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Warner Losh <imp@bsdimp.com>
2021-05-11bsd-user: style tweak: use {} for all if statements, format else correctlyWarner Losh
Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Warner Losh <imp@bsdimp.com>
2021-05-11bsd-user: style tweak: don't assign in if statementsWarner Losh
Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Warner Losh <imp@bsdimp.com>
2021-05-11bsd-user: style tweak: Use preferred block commentsWarner Losh
Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Warner Losh <imp@bsdimp.com>
2021-05-11bsd-user: style tweak: remove spacing after '*' and add after }Warner Losh
Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Warner Losh <imp@bsdimp.com>
2021-05-11bsd-user: style tweak: move extern to header fileWarner Losh
extern char **environ has no standard home, so move the declaration from the .c file to a handy .h file. Since this is a standard, old-school UNIX interface dating from the 5th edition, it's not quite the same issue that the rule is supposed to protect against, though. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Warner Losh <imp@bsdimp.com>
2021-05-11bsd-user: Remove commented out codeWarner Losh
Remove dead code that's been commented out forever. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Warner Losh <imp@bsdimp.com>
2021-04-30bsd-user: style tweak: keyword space (Warner Losh
Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Warner Losh <imp@bsdimp.com>
2021-02-16exec: Use cpu_untagged_addr in g2h; split out g2h_untaggedRichard Henderson
Use g2h_untagged in contexts that have no cpu, e.g. the binary loaders that operate before the primary cpu is created. As a colollary, target_mmap and friends must use untagged addresses, since they are used by the loaders. Use g2h_untagged on values returned from target_mmap, as the kernel never applies a tag itself. Use g2h_untagged on all pc values. The only current user of tags, aarch64, removes tags from code addresses upon branch, so "pc" is always untagged. Use g2h with the cpu context on hand wherever possible. Use g2h_untagged in lock_user, which will be updated soon. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20210212184902.1251044-13-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-02-16bsd-user: Tidy VERIFY_READ/VERIFY_WRITERichard Henderson
These constants are only ever used with access_ok, and friends. Rather than translating them to PAGE_* bits, let them equal the PAGE_* bits to begin. Reviewed-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20210212184902.1251044-9-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-03-16misc: Replace zero-length arrays with flexible array member (automatic)Philippe Mathieu-Daudé
Description copied from Linux kernel commit from Gustavo A. R. Silva (see [3]): --v-- description start --v-- The current codebase makes use of the zero-length array language extension to the C90 standard, but the preferred mechanism to declare variable-length types such as these ones is a flexible array member [1], introduced in C99: struct foo { int stuff; struct boo array[]; }; By making use of the mechanism above, we will get a compiler warning in case the flexible array does not occur last in the structure, which will help us prevent some kind of undefined behavior bugs from being unadvertenly introduced [2] to the Linux codebase from now on. --^-- description end --^-- Do the similar housekeeping in the QEMU codebase (which uses C99 since commit 7be41675f7cb). All these instances of code were found with the help of the following Coccinelle script: @@ identifier s, m, a; type t, T; @@ struct s { ... t m; - T a[0]; + T a[]; }; @@ identifier s, m, a; type t, T; @@ struct s { ... t m; - T a[0]; + T a[]; } QEMU_PACKED; [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76497732932f [3] https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git/commit/?id=17642a2fbd2c1 Inspired-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-01target: Do not include "exec/exec-all.h" if it is not necessaryPhilippe Mathieu-Daudé
Code change produced with: $ git grep '#include "exec/exec-all.h"' | \ cut -d: -f-1 | \ xargs egrep -L "(cpu_address_space_init|cpu_loop_|tlb_|tb_|GETPC|singlestep|TranslationBlock)" | \ xargs sed -i.bak '/#include "exec\/exec-all.h"/d' Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <20180528232719.4721-10-f4bug@amsat.org> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-07-14qom/cpu: remove host_tid fieldAlex Bennée
This was only used by the gdbstub and even then was only being set for subsequent threads. Rather the continue duplicating the number just make the gdbstub get the information from TaskState structure. Now the tid is correctly reported for all threads the bug I was seeing with "vCont;C04:0;c" packets is fixed as the correct tid is reported to gdb. I moved cpu_gdb_index into the gdbstub to facilitate easy access to the TaskState which is used elsewhere in gdbstub. To prevent BSD failing to build I've included ts_tid into its TaskStruct but not populated it - which was the same state as the old cpu->host_tid. I'll leave it up to the BSD maintainers to actually populate this properly if they want a working gdbstub with user-threads. Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Greg Kurz <groug@kaod.org> Reviewed-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20170712105216.747-4-alex.bennee@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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