Import QEMU upstream snapshot d2e570c

Upstream: https://gitlab.com/qemu-project/qemu.git

Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475

linux-user/include/host/sparc64/host-signal.h

@@ -0,0 +1,64 @@
+/*
+ * host-signal.h: signal info dependent on the host architecture
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ * Copyright (c) 2021 Linaro Limited
+ *
+ * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef SPARC64_HOST_SIGNAL_H
+#define SPARC64_HOST_SIGNAL_H
+
+/* The third argument to a SA_SIGINFO handler is struct sigcontext.  */
+typedef struct sigcontext host_sigcontext;
+
+static inline uintptr_t host_signal_pc(host_sigcontext *sc)
+{
+    return sc->sigc_regs.tpc;
+}
+
+static inline void host_signal_set_pc(host_sigcontext *sc, uintptr_t pc)
+{
+    sc->sigc_regs.tpc = pc;
+    sc->sigc_regs.tnpc = pc + 4;
+}
+
+static inline void *host_signal_mask(host_sigcontext *sc)
+{
+    return &sc->sigc_mask;
+}
+
+static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc)
+{
+    uint32_t insn = *(uint32_t *)host_signal_pc(uc);
+
+    if ((insn >> 30) == 3) {
+        switch ((insn >> 19) & 0x3f) {
+        case 0x05: /* stb */
+        case 0x15: /* stba */
+        case 0x06: /* sth */
+        case 0x16: /* stha */
+        case 0x04: /* st */
+        case 0x14: /* sta */
+        case 0x07: /* std */
+        case 0x17: /* stda */
+        case 0x0e: /* stx */
+        case 0x1e: /* stxa */
+        case 0x24: /* stf */
+        case 0x34: /* stfa */
+        case 0x27: /* stdf */
+        case 0x37: /* stdfa */
+        case 0x26: /* stqf */
+        case 0x36: /* stqfa */
+        case 0x25: /* stfsr */
+        case 0x3c: /* casa */
+        case 0x3e: /* casxa */
+            return true;
+        }
+    }
+    return false;
+}
+
+#endif