1 files changed, 89 insertions, 0 deletions
diff --git a/exec/hostarch.c b/exec/hostarch.c
new file mode 100644
index 00000000..a3b93305
--- /dev/null
+++ b/exec/hostarch.c
@@ -0,0 +1,89 @@
+/* Determine the ELF architecture and machine flavor
+   from a Mach host port.  Used by the exec and core servers.
+   Copyright (C) 1992,93,95,96,99,2000,02 Free Software Foundation, Inc.
+   Written by Roland McGrath.
+
+This file is part of the GNU Hurd.
+
+The GNU Hurd is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+The GNU Hurd is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with the GNU Hurd; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "priv.h"
+#include <mach.h>
+#include <hurd/hurd_types.h>
+#include <errno.h>
+#include <elf.h>
+
+error_t
+elf_machine_matches_host (ElfW(Half) e_machine)
+{
+  static void *host_type;	/* Cached entry into the switch below.  */
+  struct host_basic_info hostinfo;
+
+  if (host_type)
+    goto *host_type;
+  else
+    {
+      error_t err;
+      mach_msg_type_number_t hostinfocnt = HOST_BASIC_INFO_COUNT;
+
+      err = host_info (mach_host_self (), HOST_BASIC_INFO,
+		       (host_info_t) &hostinfo, &hostinfocnt);
+      if (err)
+	return err;
+      assert (hostinfocnt == HOST_BASIC_INFO_COUNT);
+    }
+
+#define CACHE(test) ({ __label__ here; host_type = &&here; \
+		      here: return (test) ? 0 : ENOEXEC; })
+  switch (hostinfo.cpu_type)
+    {
+    case CPU_TYPE_MC68020:
+    case CPU_TYPE_MC68030:
+    case CPU_TYPE_MC68040:
+      CACHE (e_machine == EM_68K);
+
+    case CPU_TYPE_I860:
+      CACHE (e_machine == EM_860);
+
+    case CPU_TYPE_MIPS:
+      CACHE (e_machine == EM_MIPS);
+
+    case CPU_TYPE_MC88000:
+      CACHE (e_machine == EM_88K);
+
+    case CPU_TYPE_SPARC:
+      CACHE (e_machine == EM_SPARC);
+
+    case CPU_TYPE_I386:
+    case CPU_TYPE_I486:
+    case CPU_TYPE_PENTIUM:
+    case CPU_TYPE_PENTIUMPRO:
+      CACHE (e_machine == EM_386);
+
+    case CPU_TYPE_POWERPC:
+      CACHE (e_machine == EM_PPC);
+
+    case CPU_TYPE_ALPHA:
+      CACHE (e_machine == EM_ALPHA);
+
+    case CPU_TYPE_HPPA:
+      CACHE (e_machine == EM_PARISC);
+
+    default:
+      return EGRATUITOUS;	/* XXX */
+    }
+
+  return 0;
+}