Move shared vmmouse files into a separate static lib so we can

share it with the vmmouse detection utility I'm about to add.

1 files changed, 147 insertions, 0 deletions

diff --git a/shared/vmmouse_proto.c b/shared/vmmouse_proto.c
new file mode 100644
index 0000000..b50e071
--- /dev/null
+++ b/shared/vmmouse_proto.c
@@ -0,0 +1,147 @@
+/*
+ * Copyright 1999-2006 by VMware, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of the copyright holder(s)
+ * and author(s) shall not be used in advertising or otherwise to promote
+ * the sale, use or other dealings in this Software without prior written
+ * authorization from the copyright holder(s) and author(s).
+ */
+
+/*
+ * vmmouse_proto.c --
+ *
+ *      The communication protocol between the guest and the vmmouse
+ *      virtual device.
+ */
+
+
+#include "vmmouse_proto.h"
+
+
+/*
+ *----------------------------------------------------------------------------
+ *
+ * VMMouseProtoInOut --
+ *
+ *      Send a low-bandwidth basic request (16 bytes) to vmware, and return its
+ *      reply (24 bytes).
+ *
+ * Results:
+ *      Host-side response returned in cmd IN/OUT parameter.
+ *
+ * Side effects:
+ *      Pokes the communication port.
+ *
+ *----------------------------------------------------------------------------
+ */
+
+static void
+VMMouseProtoInOut(VMMouseProtoCmd *cmd) // IN/OUT
+{
+#ifdef __x86_64__
+   uint64_t dummy;
+
+   __asm__ __volatile__(
+        "pushq %%rax"           "\n\t"
+        "movq 40(%%rax), %%rdi" "\n\t"
+        "movq 32(%%rax), %%rsi" "\n\t"
+        "movq 24(%%rax), %%rdx" "\n\t"
+        "movq 16(%%rax), %%rcx" "\n\t"
+        "movq  8(%%rax), %%rbx" "\n\t"
+        "movq   (%%rax), %%rax" "\n\t"
+        "inl %%dx, %%eax"       "\n\t"  /* NB: There is no inq instruction */
+        "xchgq %%rax, (%%rsp)"  "\n\t"
+        "movq %%rdi, 40(%%rax)" "\n\t"
+        "movq %%rsi, 32(%%rax)" "\n\t"
+        "movq %%rdx, 24(%%rax)" "\n\t"
+        "movq %%rcx, 16(%%rax)" "\n\t"
+        "movq %%rbx,  8(%%rax)" "\n\t"
+        "popq          (%%rax)"
+      : "=a" (dummy)
+      : "0" (cmd)
+      /*
+       * vmware can modify the whole VM state without the compiler knowing
+       * it. So far it does not modify EFLAGS. --hpreg
+       */
+      : "rbx", "rcx", "rdx", "rsi", "rdi", "memory"
+   );
+#else
+#ifdef __i386__
+   uint32_t dummy;
+
+   __asm__ __volatile__(
+        "pushl %%ebx"           "\n\t"
+        "pushl %%eax"           "\n\t"
+        "movl 20(%%eax), %%edi" "\n\t"
+        "movl 16(%%eax), %%esi" "\n\t"
+        "movl 12(%%eax), %%edx" "\n\t"
+        "movl  8(%%eax), %%ecx" "\n\t"
+        "movl  4(%%eax), %%ebx" "\n\t"
+        "movl   (%%eax), %%eax" "\n\t"
+        "inl %%dx, %%eax"       "\n\t"
+        "xchgl %%eax, (%%esp)"  "\n\t"
+        "movl %%edi, 20(%%eax)" "\n\t"
+        "movl %%esi, 16(%%eax)" "\n\t"
+        "movl %%edx, 12(%%eax)" "\n\t"
+        "movl %%ecx,  8(%%eax)" "\n\t"
+        "movl %%ebx,  4(%%eax)" "\n\t"
+        "popl          (%%eax)" "\n\t"
+        "popl           %%ebx"
+      : "=a" (dummy)
+      : "0" (cmd)
+      /*
+       * vmware can modify the whole VM state without the compiler knowing
+       * it. So far it does not modify EFLAGS. --hpreg
+       */
+      : "ecx", "edx", "esi", "edi", "memory"
+   );
+#else
+#error "VMMouse is only supported on x86 and x86-64."
+#endif
+#endif
+}
+
+
+/*
+ *-----------------------------------------------------------------------------
+ *
+ * VMMouseProto_SendCmd --
+ *
+ *      Send a request (16 bytes) to vmware, and synchronously return its
+ *      reply (24 bytes).
+ *
+ * Result:
+ *      None
+ *
+ * Side-effects:
+ *      None
+ *
+ *-----------------------------------------------------------------------------
+ */
+
+void
+VMMouseProto_SendCmd(VMMouseProtoCmd *cmd) // IN/OUT
+{
+   cmd->in.magic = VMMOUSE_PROTO_MAGIC;
+   cmd->in.port = VMMOUSE_PROTO_PORT;
+
+   VMMouseProtoInOut(cmd);
+}