mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-02-11 13:02:10 +08:00
d946c2884d
This is the normal "passing a buffer straight to printf makes GCC warn". While we know this particular case is fine, the trend in this source tree is to fix this anyways to avoid the warnings.
519 lines
11 KiB
C
519 lines
11 KiB
C
/* Simulator hardware option handling.
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Copyright (C) 1998, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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Contributed by Cygnus Support and Andrew Cagney.
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This file is part of GDB, the GNU debugger.
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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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#include "sim-main.h"
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#include "sim-assert.h"
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#include "sim-options.h"
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#include "sim-hw.h"
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#include "hw-tree.h"
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#include "hw-device.h"
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#include "hw-main.h"
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#include "hw-base.h"
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#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#include <ctype.h>
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#include <errno.h>
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struct sim_hw {
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struct hw *tree;
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int trace_p;
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int info_p;
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/* if called from a processor */
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sim_cpu *cpu;
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sim_cia cia;
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};
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struct hw *
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sim_hw_parse (struct sim_state *sd,
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const char *fmt,
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...)
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{
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struct hw *current;
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va_list ap;
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va_start (ap, fmt);
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current = hw_tree_vparse (STATE_HW (sd)->tree, fmt, ap);
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va_end (ap);
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return current;
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}
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struct printer {
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struct sim_state *file;
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void (*print) (struct sim_state *, const char *, va_list ap);
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};
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static void
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do_print (void *file, const char *fmt, ...)
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{
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struct printer *p = file;
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va_list ap;
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va_start (ap, fmt);
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p->print (p->file, fmt, ap);
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va_end (ap);
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}
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void
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sim_hw_print (struct sim_state *sd,
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void (*print) (struct sim_state *, const char *, va_list ap))
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{
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struct printer p;
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p.file = sd;
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p.print = print;
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hw_tree_print (STATE_HW (sd)->tree, do_print, &p);
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}
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/* command line options. */
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enum {
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OPTION_HW_INFO = OPTION_START,
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OPTION_HW_TRACE,
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OPTION_HW_DEVICE,
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OPTION_HW_LIST,
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OPTION_HW_FILE,
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};
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static DECLARE_OPTION_HANDLER (hw_option_handler);
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static const OPTION hw_options[] =
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{
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{ {"hw-info", no_argument, NULL, OPTION_HW_INFO },
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'\0', NULL, "List configurable hw regions",
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hw_option_handler },
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{ {"info-hw", no_argument, NULL, OPTION_HW_INFO },
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'\0', NULL, NULL,
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hw_option_handler },
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{ {"hw-trace", optional_argument, NULL, OPTION_HW_TRACE },
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'\0', "on|off", "Trace all hardware devices",
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hw_option_handler },
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{ {"trace-hw", optional_argument, NULL, OPTION_HW_TRACE },
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'\0', NULL, NULL,
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hw_option_handler },
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{ {"hw-device", required_argument, NULL, OPTION_HW_DEVICE },
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'\0', "DEVICE", "Add the specified device",
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hw_option_handler },
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{ {"hw-list", no_argument, NULL, OPTION_HW_LIST },
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'\0', NULL, "List the device tree",
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hw_option_handler },
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{ {"hw-file", required_argument, NULL, OPTION_HW_FILE },
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'\0', "FILE", "Add the devices listed in the file",
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hw_option_handler },
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{ {NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL }
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};
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/* Copied from ../ppc/psim.c:psim_merge_device_file() */
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static SIM_RC
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merge_device_file (struct sim_state *sd,
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const char *file_name)
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{
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FILE *description;
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struct hw *current = STATE_HW (sd)->tree;
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int line_nr;
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char device_path[1000];
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/* try opening the file */
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description = fopen (file_name, "r");
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if (description == NULL)
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{
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perror (file_name);
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return SIM_RC_FAIL;
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}
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line_nr = 0;
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while (fgets (device_path, sizeof(device_path), description))
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{
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char *device;
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/* check that a complete line was read */
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if (strchr (device_path, '\n') == NULL)
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{
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fclose (description);
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sim_io_eprintf (sd, "%s:%d: line to long", file_name, line_nr);
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return SIM_RC_FAIL;
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}
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*strchr (device_path, '\n') = '\0';
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line_nr++;
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/* skip comments ("#" or ";") and blank lines lines */
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for (device = device_path;
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*device != '\0' && isspace (*device);
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device++);
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if (device[0] == '#'
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|| device[0] == ';'
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|| device[0] == '\0')
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continue;
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/* merge any appended lines */
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while (device_path[strlen (device_path) - 1] == '\\')
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{
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int curlen = strlen (device_path) - 1;
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/* zap the `\' at the end of the line */
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device_path[curlen] = '\0';
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/* append the next line */
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if (!fgets (device_path + curlen,
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sizeof (device_path) - curlen,
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description))
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{
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fclose (description);
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sim_io_eprintf (sd, "%s:%d: unexpected eof", file_name, line_nr);
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return SIM_RC_FAIL;
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}
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if (strchr(device_path, '\n') == NULL)
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{
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fclose(description);
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sim_io_eprintf (sd, "%s:%d: line to long", file_name, line_nr);
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return SIM_RC_FAIL;
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}
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*strchr(device_path, '\n') = '\0';
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line_nr++;
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}
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/* parse this line */
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current = hw_tree_parse (current, "%s", device);
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}
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fclose (description);
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return SIM_RC_OK;
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}
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static SIM_RC
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hw_option_handler (struct sim_state *sd, sim_cpu *cpu, int opt,
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char *arg, int is_command)
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{
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switch (opt)
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{
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case OPTION_HW_INFO:
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{
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/* delay info until after the tree is finished */
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STATE_HW (sd)->info_p = 1;
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return SIM_RC_OK;
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break;
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}
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case OPTION_HW_TRACE:
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{
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if (arg == NULL)
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{
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STATE_HW (sd)->trace_p = 1;
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}
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else if (strcmp (arg, "yes") == 0
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|| strcmp (arg, "on") == 0)
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{
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STATE_HW (sd)->trace_p = 1;
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}
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else if (strcmp (arg, "no") == 0
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|| strcmp (arg, "off") == 0)
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{
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STATE_HW (sd)->trace_p = 0;
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}
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else
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{
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sim_io_eprintf (sd, "Option --hw-trace ignored\n");
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/* set tracing on all devices */
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return SIM_RC_FAIL;
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}
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/* FIXME: Not very nice - see also hw-base.c */
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if (STATE_HW (sd)->trace_p)
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hw_tree_parse (STATE_HW (sd)->tree, "/global-trace? true");
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return SIM_RC_OK;
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break;
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}
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case OPTION_HW_DEVICE:
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{
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hw_tree_parse (STATE_HW (sd)->tree, "%s", arg);
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return SIM_RC_OK;
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}
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case OPTION_HW_LIST:
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{
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sim_hw_print (sd, sim_io_vprintf);
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return SIM_RC_OK;
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}
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case OPTION_HW_FILE:
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{
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return merge_device_file (sd, arg);
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}
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default:
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sim_io_eprintf (sd, "Unknown hw option %d\n", opt);
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return SIM_RC_FAIL;
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}
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return SIM_RC_FAIL;
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}
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/* "hw" module install handler.
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This is called via sim_module_install to install the "hw" subsystem
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into the simulator. */
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static MODULE_INIT_FN sim_hw_init;
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static MODULE_UNINSTALL_FN sim_hw_uninstall;
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SIM_RC
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sim_hw_install (struct sim_state *sd)
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{
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SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
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sim_add_option_table (sd, NULL, hw_options);
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sim_module_add_uninstall_fn (sd, sim_hw_uninstall);
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sim_module_add_init_fn (sd, sim_hw_init);
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STATE_HW (sd) = ZALLOC (struct sim_hw);
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STATE_HW (sd)->tree = hw_tree_create (sd, "core");
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return SIM_RC_OK;
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}
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static SIM_RC
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sim_hw_init (struct sim_state *sd)
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{
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/* FIXME: anything needed? */
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hw_tree_finish (STATE_HW (sd)->tree);
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if (STATE_HW (sd)->info_p)
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sim_hw_print (sd, sim_io_vprintf);
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return SIM_RC_OK;
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}
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/* Uninstall the "hw" subsystem from the simulator. */
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static void
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sim_hw_uninstall (struct sim_state *sd)
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{
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/* hw_tree_delete (STATE_HW (sd)->tree); */
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zfree (STATE_HW (sd));
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STATE_HW (sd) = NULL;
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}
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/* Data transfers to/from the hardware device tree. There are several
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cases. */
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/* CPU: The simulation is running and the current CPU/CIA
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initiates a data transfer. */
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void
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sim_cpu_hw_io_read_buffer (sim_cpu *cpu,
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sim_cia cia,
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struct hw *hw,
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void *dest,
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int space,
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unsigned_word addr,
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unsigned nr_bytes)
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{
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SIM_DESC sd = CPU_STATE (cpu);
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STATE_HW (sd)->cpu = cpu;
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STATE_HW (sd)->cia = cia;
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if (hw_io_read_buffer (hw, dest, space, addr, nr_bytes) != nr_bytes)
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sim_engine_abort (sd, cpu, cia, "broken CPU read");
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}
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void
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sim_cpu_hw_io_write_buffer (sim_cpu *cpu,
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sim_cia cia,
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struct hw *hw,
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const void *source,
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int space,
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unsigned_word addr,
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unsigned nr_bytes)
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{
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SIM_DESC sd = CPU_STATE (cpu);
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STATE_HW (sd)->cpu = cpu;
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STATE_HW (sd)->cia = cia;
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if (hw_io_write_buffer (hw, source, space, addr, nr_bytes) != nr_bytes)
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sim_engine_abort (sd, cpu, cia, "broken CPU write");
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}
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/* SYSTEM: A data transfer is being initiated by the system. */
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unsigned
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sim_hw_io_read_buffer (struct sim_state *sd,
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struct hw *hw,
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void *dest,
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int space,
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unsigned_word addr,
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unsigned nr_bytes)
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{
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STATE_HW (sd)->cpu = NULL;
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return hw_io_read_buffer (hw, dest, space, addr, nr_bytes);
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}
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unsigned
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sim_hw_io_write_buffer (struct sim_state *sd,
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struct hw *hw,
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const void *source,
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int space,
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unsigned_word addr,
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unsigned nr_bytes)
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{
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STATE_HW (sd)->cpu = NULL;
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return hw_io_write_buffer (hw, source, space, addr, nr_bytes);
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}
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/* Abort the simulation specifying HW as the reason */
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void
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hw_vabort (struct hw *me,
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const char *fmt,
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va_list ap)
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{
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const char *name;
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char *msg;
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/* find an identity */
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if (me != NULL && hw_path (me) != NULL && hw_path (me) [0] != '\0')
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name = hw_path (me);
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else if (me != NULL && hw_name (me) != NULL && hw_name (me)[0] != '\0')
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name = hw_name (me);
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else if (me != NULL && hw_family (me) != NULL && hw_family (me)[0] != '\0')
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name = hw_family (me);
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else
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name = "device";
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/* construct an updated format string */
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msg = alloca (strlen (name) + strlen (": ") + strlen (fmt) + 1);
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strcpy (msg, name);
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strcat (msg, ": ");
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strcat (msg, fmt);
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/* report the problem */
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sim_engine_vabort (hw_system (me),
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STATE_HW (hw_system (me))->cpu,
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STATE_HW (hw_system (me))->cia,
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msg, ap);
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}
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void
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hw_abort (struct hw *me,
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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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/* report the problem */
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va_start (ap, fmt);
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hw_vabort (me, fmt, ap);
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va_end (ap);
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}
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void
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sim_hw_abort (struct sim_state *sd,
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struct hw *me,
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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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if (me == NULL)
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sim_engine_vabort (sd, NULL, NULL_CIA, fmt, ap);
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else
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hw_vabort (me, fmt, ap);
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va_end (ap);
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}
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/* MISC routines to tie HW into the rest of the system */
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void
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hw_halt (struct hw *me,
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int reason,
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int status)
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{
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struct sim_state *sd = hw_system (me);
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struct sim_hw *sim = STATE_HW (sd);
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sim_engine_halt (sd, sim->cpu, NULL, sim->cia, reason, status);
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}
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struct _sim_cpu *
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hw_system_cpu (struct hw *me)
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{
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return STATE_HW (hw_system (me))->cpu;
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}
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void
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hw_trace (struct hw *me,
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const char *fmt,
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...)
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{
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if (hw_trace_p (me)) /* to be sure, to be sure */
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{
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va_list ap;
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va_start (ap, fmt);
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sim_io_eprintf (hw_system (me), "%s: ", hw_path (me));
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sim_io_evprintf (hw_system (me), fmt, ap);
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sim_io_eprintf (hw_system (me), "\n");
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va_end (ap);
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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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int
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do_hw_poll_read (struct hw *me,
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do_hw_poll_read_method *read,
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int sim_io_fd,
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void *buf,
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unsigned sizeof_buf)
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{
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int status = read (hw_system (me), sim_io_fd, buf, sizeof_buf);
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if (status > 0)
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return status;
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else if (status == 0 && sizeof_buf == 0)
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return 0;
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else if (status == 0)
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return HW_IO_EOF;
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else /* status < 0 */
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{
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#ifdef EAGAIN
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if (STATE_CALLBACK (hw_system (me))->last_errno == EAGAIN)
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return HW_IO_NOT_READY;
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else
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return HW_IO_EOF;
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#else
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return HW_IO_EOF;
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#endif
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}
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}
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