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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [sim/] [ppc/] [os_emul.c] - Blame information for rev 227

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1 227 jeremybenn
/*  This file is part of the program psim.
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    Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
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    This program is free software; you can redistribute it and/or modify
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    it under the terms of the GNU General Public License as published by
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    the Free Software Foundation; either version 2 of the License, or
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    (at your option) any later version.
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    This program is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
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    along with this program; if not, write to the Free Software
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    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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    */
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#ifndef _OS_EMUL_C_
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#define _OS_EMUL_C_
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#include "cpu.h"
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#include "idecode.h"
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#include "os_emul.h"
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#include "emul_generic.h"
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#include "emul_netbsd.h"
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#include "emul_unix.h"
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#include "emul_chirp.h"
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#include "emul_bugapi.h"
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static const os_emul *(os_emulations[]) = {
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  &emul_chirp,
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  &emul_bugapi,
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  &emul_netbsd,
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  &emul_solaris,
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  &emul_linux,
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};
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INLINE_OS_EMUL\
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(os_emul *)
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os_emul_create(const char *file_name,
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               device *root)
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{
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  const char *emulation_name = NULL;
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  bfd *image;
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  os_emul *chosen_emulation = NULL;
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  bfd_init(); /* would never hurt */
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  /* open the file */
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  image = bfd_openr(file_name, NULL);
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  if (image == NULL) {
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    bfd_perror(file_name);
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    error("nothing loaded\n");
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  }
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  /* check it is an executable */
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  if (!bfd_check_format(image, bfd_object)) {
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    TRACE(trace_tbd,
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          ("FIXME - should check more than just bfd_check_format\n"));
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    TRACE(trace_os_emul,
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          ("%s not an executable, assumeing a device file\n", file_name));
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    bfd_close(image);
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    image = NULL;
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  }
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  /* if a device file, load that before trying the emulations on */
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  if (image == NULL) {
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    psim_merge_device_file(root, file_name);
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  }
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  /* see if the device tree already specifies the required emulation */
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  if (tree_find_property(root, "/openprom/options/os-emul") != NULL)
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    emulation_name =
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      tree_find_string_property(root, "/openprom/options/os-emul");
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  else
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    emulation_name = NULL;
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  /* go through each emulation to see if they reconize it. FIXME -
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     should have some sort of imported table from a separate file */
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  {
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    os_emul_data *emul_data;
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    const os_emul **possible_emulation;
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    chosen_emulation = NULL;
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    for (possible_emulation = os_emulations, emul_data = NULL;
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         *possible_emulation != NULL && emul_data == NULL;
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         possible_emulation++) {
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      emul_data = (*possible_emulation)->create(root,
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                                                image,
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                                                emulation_name);
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      if (emul_data != NULL) {
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        chosen_emulation = ZALLOC(os_emul);
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        *chosen_emulation = **possible_emulation;
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        chosen_emulation->data = emul_data;
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      }
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    }
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  }
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  /* clean up */
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  if (image != NULL)
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    bfd_close(image);
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  return chosen_emulation;
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}
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INLINE_OS_EMUL\
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(void)
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os_emul_init(os_emul *emulation,
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             int nr_cpus)
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{
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  if (emulation != (os_emul*)0)
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    emulation->init(emulation->data, nr_cpus);
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}
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INLINE_OS_EMUL\
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(void)
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os_emul_system_call(cpu *processor,
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                    unsigned_word cia)
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{
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  os_emul *emulation = cpu_os_emulation(processor);
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  if (emulation != (os_emul*)0 && emulation->system_call != 0)
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    emulation->system_call(processor, cia, emulation->data);
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  else
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    error("System call emulation not available\n");
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}
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INLINE_OS_EMUL\
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(int)
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os_emul_instruction_call(cpu *processor,
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                         unsigned_word cia,
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                         unsigned_word ra)
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{
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  os_emul *emulation = cpu_os_emulation(processor);
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  if (emulation != (os_emul*)0 && emulation->instruction_call != 0)
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    return emulation->instruction_call(processor, cia, ra, emulation->data);
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  else
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    return 0;
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}
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#endif /* _OS_EMUL_C_ */

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