bwlp/qemu.git/linux-user/host/arm, branch spice_video_codecs

user: move common-user includes to a subdirectory of {bsd,linux}-user/

2022-01-12T13:08:29+00:00

Avoid polluting the compilation of common-user/ with local include files; making an include file available to common-user/ should be a deliberate decision in order to keep a clear interface that can be used by both bsd-user/ and linux-user/. Reviewed-by: Richard Henderson Signed-off-by: Paolo Bonzini

common-user: Move safe-syscall.* from linux-user

2021-12-20T18:12:24+00:00

Move linux-user safe-syscall.S and safe-syscall-error.c to common-user so that bsd-user can also use it. Also move safe-syscall.h to include/user/. Since there is nothing here that is related to the guest, as opposed to the host, build it once. Reviewed-by: Warner Losh Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson

linux-user: Rename TARGET_ERESTARTSYS to QEMU_ERESTARTSYS

2021-12-20T04:47:33+00:00

This value is fully internal to qemu, and so is not a TARGET define. We use this as an extra marker for both host and target errno. Reviewed-by: Warner Losh Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson

linux-user: Remove HAVE_SAFE_SYSCALL and hostdep.h

2021-12-20T04:47:33+00:00

All supported hosts now define HAVE_SAFE_SYSCALL, so remove the ifdefs. This leaves hostdep.h empty, so remove it. Reviewed-by: Warner Losh Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson

linux-user: Move syscall error detection into safe_syscall_base

2021-12-20T04:47:33+00:00

The current api from safe_syscall_base() is to return -errno, which is the interface provided by *some* linux kernel abis. The wrapper macro, safe_syscall(), detects error, stores into errno, and returns -1, to match the api of the system syscall(). For those kernel abis that do not return -errno natively, this leads to double syscall error detection. E.g. Linux ppc64, which sets the SO flag for error. Simplify the usage from C by moving the error detection into assembly, and usage from assembly by providing a C helper with which to set errno. Reviewed-by: Warner Losh Signed-off-by: Richard Henderson

linux-user: Untabify all safe-syscall.inc.S

2021-12-20T04:47:33+00:00

Reviewed-by: Warner Losh Reviewed-by: Philippe Mathieu-Daudé Suggested-by: Peter Maydell Signed-off-by: Richard Henderson

linux-user/signal.c: Create a common rewind_if_in_safe_syscall

2021-11-23T00:47:20+00:00

All instances of rewind_if_in_safe_syscall are the same, differing only in how the instruction point is fetched from the ucontext and the size of the registers. Use host_signal_pc and new host_signal_set_pc interfaces to fetch the pointer to the PC and adjust if needed. Delete all the old copies of rewind_if_in_safe_syscall. Acked-by: Laurent Vivier Signed-off-by: Warner Losh Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20211113045603.60391-3-imp@bsdimp.com> [rth: include safe-syscall.h, simplify ifdefs] Signed-off-by: Richard Henderson

linux-user: Add host_signal_set_pc to set pc in mcontext

2021-11-23T00:47:01+00:00

Add a new function host_signal_set_pc to set the next pc in an mcontext. The caller should ensure this is a valid PC for execution. Acked-by: Laurent Vivier Signed-off-by: Warner Losh Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson Message-Id: <20211113045603.60391-2-imp@bsdimp.com> Signed-off-by: Richard Henderson

linux-user/host/arm: Populate host_signal.h

2021-11-02T11:00:44+00:00

Split host_signal_pc and host_signal_write out of user-exec.c. Drop the *BSD code, to be re-created under bsd-user/ later. Reviewed-by: Warner Losh Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson

linux-user: Reorg handling for SIGSEGV

2021-10-30T16:52:04+00:00

Add stub host-signal.h for all linux-user hosts. Add new code replacing cpu_signal_handler. Full migration will happen one host at a time. Reviewed-by: Warner Losh Reviewed-by: Philippe Mathieu-Daudé Acked-by: Alistair Francis Signed-off-by: Richard Henderson