Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 81 insertions, 0 deletions

diff --git a/linux-user/mips64/target_signal.h b/linux-user/mips64/target_signal.h
new file mode 100644
index 000000000..275e9b7f9
--- /dev/null
+++ b/linux-user/mips64/target_signal.h
@@ -0,0 +1,81 @@
+#ifndef MIPS64_TARGET_SIGNAL_H
+#define MIPS64_TARGET_SIGNAL_H
+
+#define TARGET_SIGHUP            1      /* Hangup (POSIX).  */
+#define TARGET_SIGINT            2      /* Interrupt (ANSI).  */
+#define TARGET_SIGQUIT           3      /* Quit (POSIX).  */
+#define TARGET_SIGILL            4      /* Illegal instruction (ANSI).  */
+#define TARGET_SIGTRAP           5      /* Trace trap (POSIX).  */
+#define TARGET_SIGIOT            6      /* IOT trap (4.2 BSD).  */
+#define TARGET_SIGABRT           TARGET_SIGIOT  /* Abort (ANSI).  */
+#define TARGET_SIGEMT            7
+#define TARGET_SIGSTKFLT         7 /* XXX: incorrect */
+#define TARGET_SIGFPE            8      /* Floating-point exception (ANSI).  */
+#define TARGET_SIGKILL           9      /* Kill, unblockable (POSIX).  */
+#define TARGET_SIGBUS           10      /* BUS error (4.2 BSD).  */
+#define TARGET_SIGSEGV          11      /* Segmentation violation (ANSI).  */
+#define TARGET_SIGSYS           12
+#define TARGET_SIGPIPE          13      /* Broken pipe (POSIX).  */
+#define TARGET_SIGALRM          14      /* Alarm clock (POSIX).  */
+#define TARGET_SIGTERM          15      /* Termination (ANSI).  */
+#define TARGET_SIGUSR1          16      /* User-defined signal 1 (POSIX).  */
+#define TARGET_SIGUSR2          17      /* User-defined signal 2 (POSIX).  */
+#define TARGET_SIGCHLD          18      /* Child status has changed (POSIX).  */
+#define TARGET_SIGCLD           TARGET_SIGCHLD  /* Same as TARGET_SIGCHLD (System V).  */
+#define TARGET_SIGPWR           19      /* Power failure restart (System V).  */
+#define TARGET_SIGWINCH 20      /* Window size change (4.3 BSD, Sun).  */
+#define TARGET_SIGURG           21      /* Urgent condition on socket (4.2 BSD).  */
+#define TARGET_SIGIO            22      /* I/O now possible (4.2 BSD).  */
+#define TARGET_SIGPOLL          TARGET_SIGIO    /* Pollable event occurred (System V).  */
+#define TARGET_SIGSTOP          23      /* Stop, unblockable (POSIX).  */
+#define TARGET_SIGTSTP          24      /* Keyboard stop (POSIX).  */
+#define TARGET_SIGCONT          25      /* Continue (POSIX).  */
+#define TARGET_SIGTTIN          26      /* Background read from tty (POSIX).  */
+#define TARGET_SIGTTOU          27      /* Background write to tty (POSIX).  */
+#define TARGET_SIGVTALRM        28      /* Virtual alarm clock (4.2 BSD).  */
+#define TARGET_SIGPROF          29      /* Profiling alarm clock (4.2 BSD).  */
+#define TARGET_SIGXCPU          30      /* CPU limit exceeded (4.2 BSD).  */
+#define TARGET_SIGXFSZ          31      /* File size limit exceeded (4.2 BSD).  */
+#define TARGET_SIGRTMIN         32
+
+#define TARGET_SIG_BLOCK        1       /* for blocking signals */
+#define TARGET_SIG_UNBLOCK      2       /* for unblocking signals */
+#define TARGET_SIG_SETMASK      3       /* for setting the signal mask */
+
+/* this struct defines a stack used during syscall handling */
+
+typedef struct target_sigaltstack {
+    abi_ulong ss_sp;
+    abi_ulong ss_size;
+    abi_int ss_flags;
+} target_stack_t;
+
+/*
+ * sigaltstack controls
+ */
+#define TARGET_SS_ONSTACK     1
+#define TARGET_SS_DISABLE     2
+
+#define TARGET_SA_NOCLDSTOP     0x00000001
+#define TARGET_SA_NOCLDWAIT     0x00010000
+#define TARGET_SA_SIGINFO       0x00000008
+#define TARGET_SA_ONSTACK       0x08000000
+#define TARGET_SA_NODEFER       0x40000000
+#define TARGET_SA_RESTART       0x10000000
+#define TARGET_SA_RESETHAND     0x80000000
+
+#define TARGET_MINSIGSTKSZ    2048
+#define TARGET_SIGSTKSZ       8192
+
+/* bit-flags */
+#define TARGET_SS_AUTODISARM (1U << 31) /* disable sas during sighandling */
+/* mask for all SS_xxx flags */
+#define TARGET_SS_FLAG_BITS  TARGET_SS_AUTODISARM
+
+#if defined(TARGET_ABI_MIPSO32)
+/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
+#define TARGET_ARCH_HAS_SETUP_FRAME
+#endif
+#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1
+
+#endif /* MIPS64_TARGET_SIGNAL_H */