1 files changed, 78 insertions, 0 deletions
diff --git a/src/third_party/unwind/dist/src/mips/Gis_signal_frame.c b/src/third_party/unwind/dist/src/mips/Gis_signal_frame.c
new file mode 100644
index 00000000000..c0e3b98368b
--- /dev/null
+++ b/src/third_party/unwind/dist/src/mips/Gis_signal_frame.c
@@ -0,0 +1,78 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2015 Imagination Technologies Limited
+   Copyright (C) 2008 CodeSourcery
+
+This file is part of libunwind.
+
+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 AUTHORS OR COPYRIGHT HOLDERS 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.  */
+
+#include "unwind_i.h"
+#include <stdio.h>
+
+int
+unw_is_signal_frame (unw_cursor_t *cursor)
+{
+  struct cursor *c = (struct cursor *) cursor;
+  unw_word_t w0, w1, ip;
+  unw_addr_space_t as;
+  unw_accessors_t *a;
+  void *arg;
+  int ret;
+
+  as = c->dwarf.as;
+  a = unw_get_accessors_int (as);
+  arg = c->dwarf.as_arg;
+
+  ip = c->dwarf.ip;
+
+  /* syscall */
+  if ((ret = (*a->access_mem) (as, ip + 4, &w1, 0, arg)) < 0)
+    return 0;
+  if ((w1 & 0xffffffff) != 0x0c)
+    return 0;
+
+  /* li v0, 0x1061 (rt) or li v0, 0x1017 */
+  if ((ret = (*a->access_mem) (as, ip, &w0, 0, arg)) < 0)
+    return 0;
+
+  switch (c->dwarf.as->abi)
+    {
+    case UNW_MIPS_ABI_O32:
+      switch (w0 & 0xffffffff)
+        {
+        case 0x24021061:
+          return 1;
+        case 0x24021017:
+          return 2;
+        default:
+          return 0;
+        }
+    case UNW_MIPS_ABI_N64:
+      switch (w0 & 0xffffffff)
+        {
+        case 0x2402145b:
+          return 1;
+        default:
+          return 0;
+        }
+    default:
+      return 0;
+    }
+}