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6df01ab8ab
The defs.h header will take care of including the various config.h headers. For now, it's just config.h, but we'll add more when we integrate gnulib in. This header should be used instead of config.h, and should be the first include in every .c file. We won't rely on the old behavior where we expected files to include the port's sim-main.h which then includes the common sim-basics.h which then includes config.h. We have a ton of code that includes things before sim-main.h, and it sometimes needs to be that way. Creating a dedicated header avoids the ordering mess and implicit inclusion that shows up otherwise.
407 lines
8.1 KiB
C
407 lines
8.1 KiB
C
/* The common simulator framework for GDB, the GNU Debugger.
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Copyright 2002-2021 Free Software Foundation, Inc.
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Contributed by Andrew Cagney and Red Hat.
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This file is part of GDB.
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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 3 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, see <http://www.gnu.org/licenses/>. */
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/* This must come before any other includes. */
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#include "defs.h"
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#include "sim-main.h"
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#include "sim-io.h"
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#include "targ-vals.h"
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#include <errno.h>
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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <stdlib.h>
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#undef open
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/* Define the rate at which the simulator should poll the host
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for a quit. */
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#ifndef POLL_QUIT_INTERVAL
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#define POLL_QUIT_INTERVAL 0x10
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#endif
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static int poll_quit_count = POLL_QUIT_INTERVAL;
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/* See the file include/callbacks.h for a description */
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int
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sim_io_init (SIM_DESC sd)
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{
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return STATE_CALLBACK (sd)->init (STATE_CALLBACK (sd));
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}
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int
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sim_io_shutdown (SIM_DESC sd)
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{
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return STATE_CALLBACK (sd)->shutdown (STATE_CALLBACK (sd));
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}
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int
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sim_io_unlink (SIM_DESC sd,
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const char *f1)
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{
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return STATE_CALLBACK (sd)->unlink (STATE_CALLBACK (sd), f1);
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}
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int64_t
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sim_io_time (SIM_DESC sd)
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{
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return STATE_CALLBACK (sd)->time (STATE_CALLBACK (sd));
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}
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int
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sim_io_system (SIM_DESC sd, const char *s)
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{
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return STATE_CALLBACK (sd)->system (STATE_CALLBACK (sd), s);
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}
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int
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sim_io_rename (SIM_DESC sd,
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const char *f1,
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const char *f2)
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{
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return STATE_CALLBACK (sd)->rename (STATE_CALLBACK (sd), f1, f2);
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}
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int
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sim_io_write_stdout (SIM_DESC sd,
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const char *buf,
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int len)
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{
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switch (CURRENT_STDIO) {
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case DO_USE_STDIO:
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return STATE_CALLBACK (sd)->write_stdout (STATE_CALLBACK (sd), buf, len);
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break;
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case DONT_USE_STDIO:
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return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 1, buf, len);
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break;
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default:
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sim_io_error (sd, "sim_io_write_stdout: unaccounted switch\n");
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break;
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}
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return 0;
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}
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void
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sim_io_flush_stdout (SIM_DESC sd)
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{
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switch (CURRENT_STDIO) {
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case DO_USE_STDIO:
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STATE_CALLBACK (sd)->flush_stdout (STATE_CALLBACK (sd));
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break;
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case DONT_USE_STDIO:
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break;
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default:
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sim_io_error (sd, "sim_io_flush_stdout: unaccounted switch\n");
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break;
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}
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}
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int
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sim_io_write_stderr (SIM_DESC sd,
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const char *buf,
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int len)
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{
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switch (CURRENT_STDIO) {
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case DO_USE_STDIO:
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return STATE_CALLBACK (sd)->write_stderr (STATE_CALLBACK (sd), buf, len);
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break;
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case DONT_USE_STDIO:
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return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 2, buf, len);
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break;
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default:
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sim_io_error (sd, "sim_io_write_stderr: unaccounted switch\n");
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break;
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}
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return 0;
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}
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void
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sim_io_flush_stderr (SIM_DESC sd)
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{
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switch (CURRENT_STDIO) {
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case DO_USE_STDIO:
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STATE_CALLBACK (sd)->flush_stderr (STATE_CALLBACK (sd));
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break;
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case DONT_USE_STDIO:
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break;
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default:
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sim_io_error (sd, "sim_io_flush_stderr: unaccounted switch\n");
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break;
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}
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}
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int
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sim_io_write (SIM_DESC sd,
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int fd,
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const char *buf,
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int len)
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{
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return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), fd, buf, len);
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}
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int
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sim_io_read_stdin (SIM_DESC sd,
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char *buf,
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int len)
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{
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switch (CURRENT_STDIO) {
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case DO_USE_STDIO:
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return STATE_CALLBACK (sd)->read_stdin (STATE_CALLBACK (sd), buf, len);
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break;
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case DONT_USE_STDIO:
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return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), 0, buf, len);
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break;
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default:
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sim_io_error (sd, "sim_io_read_stdin: unaccounted switch\n");
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break;
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}
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return 0;
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}
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int
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sim_io_read (SIM_DESC sd, int fd,
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char *buf,
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int len)
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{
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return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), fd, buf, len);
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}
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int
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sim_io_open (SIM_DESC sd,
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const char *name,
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int flags)
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{
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return STATE_CALLBACK (sd)->open (STATE_CALLBACK (sd), name, flags);
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}
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int64_t
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sim_io_lseek (SIM_DESC sd,
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int fd,
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int64_t off,
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int way)
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{
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return STATE_CALLBACK (sd)->lseek (STATE_CALLBACK (sd), fd, off, way);
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}
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int
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sim_io_isatty (SIM_DESC sd,
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int fd)
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{
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return STATE_CALLBACK (sd)->isatty (STATE_CALLBACK (sd), fd);
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}
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int
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sim_io_get_errno (SIM_DESC sd)
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{
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return STATE_CALLBACK (sd)->get_errno (STATE_CALLBACK (sd));
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}
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int
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sim_io_close (SIM_DESC sd,
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int fd)
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{
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return STATE_CALLBACK (sd)->close (STATE_CALLBACK (sd), fd);
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}
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void
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sim_io_printf (SIM_DESC sd,
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const char *fmt,
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...)
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{
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va_list ap;
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va_start (ap, fmt);
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STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
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va_end (ap);
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}
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void
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sim_io_vprintf (SIM_DESC sd,
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const char *fmt,
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va_list ap)
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{
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STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
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}
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void
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sim_io_eprintf (SIM_DESC sd,
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const char *fmt,
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...)
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{
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va_list ap;
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va_start (ap, fmt);
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STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
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va_end (ap);
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}
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void
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sim_io_evprintf (SIM_DESC sd,
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const char *fmt,
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va_list ap)
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{
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STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
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}
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void
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sim_io_error (SIM_DESC sd,
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const char *fmt,
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...)
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{
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if (sd == NULL || STATE_CALLBACK (sd) == NULL) {
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va_list ap;
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va_start (ap, fmt);
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vfprintf (stderr, fmt, ap);
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va_end (ap);
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fprintf (stderr, "\n");
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abort ();
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}
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else {
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va_list ap;
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va_start (ap, fmt);
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STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
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va_end (ap);
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STATE_CALLBACK (sd)->error (STATE_CALLBACK (sd), "");
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}
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}
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void
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sim_io_poll_quit (SIM_DESC sd)
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{
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if (STATE_CALLBACK (sd)->poll_quit != NULL && poll_quit_count-- < 0)
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{
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poll_quit_count = POLL_QUIT_INTERVAL;
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if (STATE_CALLBACK (sd)->poll_quit (STATE_CALLBACK (sd)))
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sim_stop (sd);
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}
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}
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/* Based on gdb-4.17/sim/ppc/main.c:sim_io_read_stdin().
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FIXME: Should not be calling fcntl() or grubbing around inside of
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->fdmap and ->errno.
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FIXME: Some completly new mechanism for handling the general
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problem of asynchronous IO is needed.
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FIXME: This function does not supress the echoing (ECHO) of input.
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Consequently polled input is always displayed.
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FIXME: This function does not perform uncooked reads.
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Consequently, data will not be read until an EOLN character has
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been entered. A cntrl-d may force the early termination of a line */
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int
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sim_io_poll_read (SIM_DESC sd,
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int sim_io_fd,
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char *buf,
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int sizeof_buf)
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{
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#if defined(O_NDELAY) && defined(F_GETFL) && defined(F_SETFL)
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int fd = STATE_CALLBACK (sd)->fdmap[sim_io_fd];
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int flags;
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int status;
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int nr_read;
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int result;
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STATE_CALLBACK (sd)->last_errno = 0;
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/* get the old status */
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flags = fcntl (fd, F_GETFL, 0);
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if (flags == -1)
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{
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perror ("sim_io_poll_read");
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return 0;
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}
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/* temp, disable blocking IO */
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status = fcntl (fd, F_SETFL, flags | O_NDELAY);
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if (status == -1)
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{
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perror ("sim_io_read_stdin");
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return 0;
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}
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/* try for input */
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nr_read = read (fd, buf, sizeof_buf);
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if (nr_read >= 0)
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{
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/* printf ("<nr-read=%d>\n", nr_read); */
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result = nr_read;
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}
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else
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{ /* nr_read < 0 */
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result = -1;
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STATE_CALLBACK (sd)->last_errno = errno;
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}
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/* return to regular vewing */
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status = fcntl (fd, F_SETFL, flags);
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if (status == -1)
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{
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perror ("sim_io_read_stdin");
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/* return 0; */
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}
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return result;
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#else
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return sim_io_read (sd, sim_io_fd, buf, sizeof_buf);
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#endif
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}
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int
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sim_io_stat (SIM_DESC sd, const char *path, struct stat *buf)
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{
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return STATE_CALLBACK (sd)->to_stat (STATE_CALLBACK (sd), path, buf);
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}
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int
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sim_io_fstat (SIM_DESC sd, int fd, struct stat *buf)
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{
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return STATE_CALLBACK (sd)->to_fstat (STATE_CALLBACK (sd), fd, buf);
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}
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