Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 146 insertions, 0 deletions

diff --git a/sim/ppc/os_emul.c b/sim/ppc/os_emul.c
new file mode 100644
index 0000000..dc60c8f
--- /dev/null
+++ b/sim/ppc/os_emul.c
@@ -0,0 +1,146 @@
+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
+
+    This program 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 of the License, or
+    (at your option) any later version.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ 
+    */
+
+
+#ifndef _OS_EMUL_C_
+#define _OS_EMUL_C_
+
+#include "cpu.h"
+#include "idecode.h"
+#include "os_emul.h"
+
+#include "emul_generic.h"
+#include "emul_netbsd.h"
+#include "emul_unix.h"
+#include "emul_chirp.h"
+#include "emul_bugapi.h"
+
+static const os_emul *(os_emulations[]) = {
+  &emul_chirp,
+  &emul_bugapi,
+  &emul_netbsd,
+  &emul_solaris,
+  &emul_linux,
+  0
+};
+
+
+INLINE_OS_EMUL\
+(os_emul *)
+os_emul_create(const char *file_name,
+	       device *root)
+{
+  const char *emulation_name = NULL;
+  bfd *image;
+  os_emul *chosen_emulation = NULL;
+
+  bfd_init(); /* would never hurt */
+
+  /* open the file */
+  image = bfd_openr(file_name, NULL);
+  if (image == NULL) {
+    bfd_perror(file_name);
+    error("nothing loaded\n");
+  }
+
+  /* check it is an executable */
+  if (!bfd_check_format(image, bfd_object)) {
+    TRACE(trace_tbd,
+	  ("FIXME - should check more than just bfd_check_format\n"));
+    TRACE(trace_os_emul,
+	  ("%s not an executable, assumeing a device file\n", file_name));
+    bfd_close(image);
+    image = NULL;
+  }
+
+  /* if a device file, load that before trying the emulations on */
+  if (image == NULL) {
+    psim_merge_device_file(root, file_name);
+  }
+
+  /* see if the device tree already specifies the required emulation */
+  if (tree_find_property(root, "/openprom/options/os-emul") != NULL)
+    emulation_name =
+      tree_find_string_property(root, "/openprom/options/os-emul");
+  else
+    emulation_name = NULL;
+
+  /* go through each emulation to see if they reconize it. FIXME -
+     should have some sort of imported table from a separate file */
+  {
+    os_emul_data *emul_data;
+    const os_emul **possible_emulation;
+    chosen_emulation = NULL;
+    for (possible_emulation = os_emulations, emul_data = NULL;
+	 *possible_emulation != NULL && emul_data == NULL;
+	 possible_emulation++) {
+      emul_data = (*possible_emulation)->create(root,
+						image,
+						emulation_name);
+      if (emul_data != NULL) {
+	chosen_emulation = ZALLOC(os_emul);
+	*chosen_emulation = **possible_emulation;
+	chosen_emulation->data = emul_data;
+      }
+    }
+  }
+
+  /* clean up */
+  if (image != NULL)
+    bfd_close(image);
+  return chosen_emulation;
+}
+
+INLINE_OS_EMUL\
+(void)
+os_emul_init(os_emul *emulation,
+	     int nr_cpus)
+{
+  if (emulation != (os_emul*)0)
+    emulation->init(emulation->data, nr_cpus);
+}
+
+INLINE_OS_EMUL\
+(void)
+os_emul_system_call(cpu *processor,
+		    unsigned_word cia)
+{
+  os_emul *emulation = cpu_os_emulation(processor);
+  if (emulation != (os_emul*)0 && emulation->system_call != 0)
+    emulation->system_call(processor, cia, emulation->data);
+  else
+    error("System call emulation not available\n");
+}
+
+INLINE_OS_EMUL\
+(int)
+os_emul_instruction_call(cpu *processor,
+			 unsigned_word cia,
+			 unsigned_word ra)
+{
+  os_emul *emulation = cpu_os_emulation(processor);
+  if (emulation != (os_emul*)0 && emulation->instruction_call != 0)
+    return emulation->instruction_call(processor, cia, ra, emulation->data);
+  else
+    return 0;
+}
+
+
+#endif /* _OS_EMUL_C_ */