qemu/linux-user/host, branch master

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

2022-01-12T13:08:29Z

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

linux-user: Fix trivial build error on loongarch64 hosts

2022-01-04T23:16:10Z

When building using GCC 8.3.0 on loongarch64 (Loongnix) we get: In file included from ../linux-user/signal.c:33: ../linux-user/host/loongarch64/host-signal.h: In function ‘host_signal_write’: ../linux-user/host/loongarch64/host-signal.h:57:9: error: a label can only be part of a statement and a declaration is not a statement uint32_t sel = (insn >> 15) & 0b11111111111; ^~~~~~~~ We don't use the 'sel' variable more than once, so drop it. Meson output for the record: Host machine cpu family: loongarch64 Host machine cpu: loongarch64 C compiler for the host machine: cc (gcc 8.3.0 "cc (Loongnix 8.3.0-6.lnd.vec.27) 8.3.0") C linker for the host machine: cc ld.bfd 2.31.1-system Fixes: ad812c3bd65 ("linux-user: Implement CPU-specific signal handler for loongarch64 hosts") Reported-by: Song Gao Suggested-by: Song Gao Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: WANG Xuerui Reviewed-by: Richard Henderson Message-Id: <20220104215027.2180972-1-f4bug@amsat.org> Signed-off-by: Richard Henderson

linux-user: Implement CPU-specific signal handler for loongarch64 hosts

2021-12-21T21:17:06Z

Signed-off-by: WANG Xuerui Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20211221054105.178795-30-git@xen0n.name> Signed-off-by: Richard Henderson

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

2021-12-20T18:12:24Z

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

2021-12-20T04:47:33Z

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

2021-12-20T04:47:33Z

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/host/sparc64: Add safe-syscall.inc.S

2021-12-20T04:47:33Z

Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson

linux-user/host/mips: Add safe-syscall.inc.S

2021-12-20T04:47:33Z

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

linux-user: Move syscall error detection into safe_syscall_base

2021-12-20T04:47:33Z

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

2021-12-20T04:47:33Z

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