1 files changed, 101 insertions, 0 deletions
diff --git a/src/third_party/unwind/dist/src/elfxx.h b/src/third_party/unwind/dist/src/elfxx.h
new file mode 100644
index 00000000000..830432c2ed1
--- /dev/null
+++ b/src/third_party/unwind/dist/src/elfxx.h
@@ -0,0 +1,101 @@
+/* libunwind - a platform-independent unwind library
+   Copyright (C) 2003, 2005 Hewlett-Packard Co
+   Copyright (C) 2007 David Mosberger-Tang
+        Contributed by David Mosberger-Tang <dmosberger@gmail.com>
+
+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 <fcntl.h>
+#include <unistd.h>
+
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include "libunwind_i.h"
+
+#if ELF_CLASS == ELFCLASS32
+# define ELF_W(x)       ELF32_##x
+# define Elf_W(x)       Elf32_##x
+# define elf_w(x)       _Uelf32_##x
+#else
+# define ELF_W(x)       ELF64_##x
+# define Elf_W(x)       Elf64_##x
+# define elf_w(x)       _Uelf64_##x
+#endif
+
+extern int elf_w (get_proc_name) (unw_addr_space_t as,
+                                  pid_t pid, unw_word_t ip,
+                                  char *buf, size_t len,
+                                  unw_word_t *offp);
+
+extern int elf_w (get_proc_name_in_image) (unw_addr_space_t as,
+                                           struct elf_image *ei,
+                                           unsigned long segbase,
+                                           unsigned long mapoff,
+                                           unw_word_t ip,
+                                           char *buf, size_t buf_len, unw_word_t *offp);
+
+extern Elf_W (Shdr)* elf_w (find_section) (struct elf_image *ei, const char* secname);
+extern int elf_w (load_debuglink) (const char* file, struct elf_image *ei, int is_local);
+
+static inline int
+elf_w (valid_object) (struct elf_image *ei)
+{
+  if (ei->size <= EI_VERSION)
+    return 0;
+
+  return (memcmp (ei->image, ELFMAG, SELFMAG) == 0
+          && ((uint8_t *) ei->image)[EI_CLASS] == ELF_CLASS
+          && ((uint8_t *) ei->image)[EI_VERSION] != EV_NONE
+          && ((uint8_t *) ei->image)[EI_VERSION] <= EV_CURRENT);
+}
+
+static inline int
+elf_map_image (struct elf_image *ei, const char *path)
+{
+  struct stat stat;
+  int fd;
+
+  fd = open (path, O_RDONLY);
+  if (fd < 0)
+    return -1;
+
+  if (fstat (fd, &stat) < 0)
+    {
+      close (fd);
+      return -1;
+    }
+
+  ei->size = stat.st_size;
+  ei->image = mmap (NULL, ei->size, PROT_READ, MAP_PRIVATE, fd, 0);
+  close (fd);
+  if (ei->image == MAP_FAILED)
+    return -1;
+
+  if (!elf_w (valid_object) (ei))
+  {
+    munmap(ei->image, ei->size);
+    return -1;
+  }
+
+  return 0;
+}