1143 lines
24 KiB
C
1143 lines
24 KiB
C
/* Remote target callback routines.
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Copyright 1995-2022 Free Software Foundation, Inc.
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Contributed by Cygnus Solutions.
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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 file provides a standard way for targets to talk to the host OS
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level. */
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/* This must come before any other includes. */
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#include "defs.h"
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#include <errno.h>
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#include <fcntl.h>
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/* For PIPE_BUF. */
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#include <limits.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <sys/stat.h>
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#include <sys/types.h>
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#include "ansidecl.h"
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/* For xmalloc. */
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#include "libiberty.h"
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#include "sim/callback.h"
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#ifndef PIPE_BUF
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#define PIPE_BUF 512
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#endif
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extern CB_TARGET_DEFS_MAP cb_init_syscall_map[];
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extern CB_TARGET_DEFS_MAP cb_init_errno_map[];
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extern CB_TARGET_DEFS_MAP cb_init_signal_map[];
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extern CB_TARGET_DEFS_MAP cb_init_open_map[];
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/* Make sure the FD provided is ok. If not, return non-zero
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and set errno. */
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static int
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fdbad (host_callback *p, int fd)
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{
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if (fd < 0 || fd > MAX_CALLBACK_FDS || p->fd_buddy[fd] < 0)
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{
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p->last_errno = EBADF;
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return -1;
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}
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return 0;
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}
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static int
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fdmap (host_callback *p, int fd)
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{
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return p->fdmap[fd];
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}
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static int
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os_close (host_callback *p, int fd)
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{
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int result;
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int i, next;
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result = fdbad (p, fd);
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if (result)
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return result;
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/* If this file descripter has one or more buddies (originals /
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duplicates from a dup), just remove it from the circular list. */
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for (i = fd; (next = p->fd_buddy[i]) != fd; )
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i = next;
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if (fd != i)
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p->fd_buddy[i] = p->fd_buddy[fd];
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else
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{
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if (p->ispipe[fd])
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{
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int other = p->ispipe[fd];
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int reader, writer;
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if (other > 0)
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{
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/* Closing the read side. */
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reader = fd;
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writer = other;
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}
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else
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{
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/* Closing the write side. */
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writer = fd;
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reader = -other;
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}
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/* If there was data in the buffer, make a last "now empty"
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call, then deallocate data. */
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if (p->pipe_buffer[writer].buffer != NULL)
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{
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(*p->pipe_empty) (p, reader, writer);
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free (p->pipe_buffer[writer].buffer);
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p->pipe_buffer[writer].buffer = NULL;
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}
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/* Clear pipe data for this side. */
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p->pipe_buffer[fd].size = 0;
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p->ispipe[fd] = 0;
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/* If this was the first close, mark the other side as the
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only remaining side. */
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if (fd != abs (other))
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p->ispipe[abs (other)] = -other;
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p->fd_buddy[fd] = -1;
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return 0;
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}
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result = close (fdmap (p, fd));
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p->last_errno = errno;
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}
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p->fd_buddy[fd] = -1;
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return result;
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}
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/* taken from gdb/util.c:notice_quit() - should be in a library */
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#if defined(_MSC_VER)
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static int
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os_poll_quit (host_callback *p)
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{
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/* NB - this will not compile! */
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int k = win32pollquit ();
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if (k == 1)
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return 1;
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else if (k == 2)
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return 1;
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return 0;
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}
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#else
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#define os_poll_quit 0
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#endif /* defined(_MSC_VER) */
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static int
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os_get_errno (host_callback *p)
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{
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return cb_host_to_target_errno (p, p->last_errno);
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}
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static int
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os_isatty (host_callback *p, int fd)
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{
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int result;
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result = fdbad (p, fd);
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if (result)
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return result;
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result = isatty (fdmap (p, fd));
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p->last_errno = errno;
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return result;
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}
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static int64_t
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os_lseek (host_callback *p, int fd, int64_t off, int way)
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{
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int64_t result;
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result = fdbad (p, fd);
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if (result)
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return result;
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result = lseek (fdmap (p, fd), off, way);
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p->last_errno = errno;
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return result;
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}
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static int
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os_open (host_callback *p, const char *name, int flags)
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{
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int i;
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for (i = 0; i < MAX_CALLBACK_FDS; i++)
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{
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if (p->fd_buddy[i] < 0)
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{
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int f = open (name, cb_target_to_host_open (p, flags), 0644);
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if (f < 0)
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{
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p->last_errno = errno;
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return f;
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}
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p->fd_buddy[i] = i;
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p->fdmap[i] = f;
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return i;
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}
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}
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p->last_errno = EMFILE;
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return -1;
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}
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static int
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os_read (host_callback *p, int fd, char *buf, int len)
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{
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int result;
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result = fdbad (p, fd);
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if (result)
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return result;
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if (p->ispipe[fd])
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{
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int writer = p->ispipe[fd];
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/* Can't read from the write-end. */
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if (writer < 0)
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{
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p->last_errno = EBADF;
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return -1;
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}
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/* Nothing to read if nothing is written. */
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if (p->pipe_buffer[writer].size == 0)
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return 0;
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/* Truncate read request size to buffer size minus what's already
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read. */
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if (len > p->pipe_buffer[writer].size - p->pipe_buffer[fd].size)
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len = p->pipe_buffer[writer].size - p->pipe_buffer[fd].size;
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memcpy (buf, p->pipe_buffer[writer].buffer + p->pipe_buffer[fd].size,
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len);
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/* Account for what we just read. */
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p->pipe_buffer[fd].size += len;
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/* If we've read everything, empty and deallocate the buffer and
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signal buffer-empty to client. (This isn't expected to be a
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hot path in the simulator, so we don't hold on to the buffer.) */
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if (p->pipe_buffer[fd].size == p->pipe_buffer[writer].size)
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{
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free (p->pipe_buffer[writer].buffer);
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p->pipe_buffer[writer].buffer = NULL;
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p->pipe_buffer[fd].size = 0;
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p->pipe_buffer[writer].size = 0;
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(*p->pipe_empty) (p, fd, writer);
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}
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return len;
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}
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result = read (fdmap (p, fd), buf, len);
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p->last_errno = errno;
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return result;
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}
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static int
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os_read_stdin (host_callback *p, char *buf, int len)
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{
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int result;
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result = read (0, buf, len);
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p->last_errno = errno;
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return result;
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}
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static int
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os_write (host_callback *p, int fd, const char *buf, int len)
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{
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int result;
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int real_fd;
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result = fdbad (p, fd);
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if (result)
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return result;
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if (p->ispipe[fd])
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{
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int reader = -p->ispipe[fd];
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/* Can't write to the read-end. */
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if (reader < 0)
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{
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p->last_errno = EBADF;
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return -1;
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}
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/* Can't write to pipe with closed read end.
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FIXME: We should send a SIGPIPE. */
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if (reader == fd)
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{
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p->last_errno = EPIPE;
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return -1;
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}
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/* As a sanity-check, we bail out it the buffered contents is much
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larger than the size of the buffer on the host. We don't want
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to run out of memory in the simulator due to a target program
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bug if we can help it. Unfortunately, regarding the value that
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reaches the simulated program, it's no use returning *less*
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than the requested amount, because cb_syscall loops calling
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this function until the whole amount is done. */
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if (p->pipe_buffer[fd].size + len > 10 * PIPE_BUF)
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{
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p->last_errno = EFBIG;
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return -1;
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}
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p->pipe_buffer[fd].buffer
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= xrealloc (p->pipe_buffer[fd].buffer, p->pipe_buffer[fd].size + len);
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memcpy (p->pipe_buffer[fd].buffer + p->pipe_buffer[fd].size,
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buf, len);
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p->pipe_buffer[fd].size += len;
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(*p->pipe_nonempty) (p, reader, fd);
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return len;
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}
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real_fd = fdmap (p, fd);
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switch (real_fd)
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{
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default:
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result = write (real_fd, buf, len);
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p->last_errno = errno;
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break;
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case 1:
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result = p->write_stdout (p, buf, len);
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break;
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case 2:
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result = p->write_stderr (p, buf, len);
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break;
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}
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return result;
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}
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static int
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os_write_stdout (host_callback *p ATTRIBUTE_UNUSED, const char *buf, int len)
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{
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return fwrite (buf, 1, len, stdout);
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}
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static void
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os_flush_stdout (host_callback *p ATTRIBUTE_UNUSED)
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{
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fflush (stdout);
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}
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static int
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os_write_stderr (host_callback *p ATTRIBUTE_UNUSED, const char *buf, int len)
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{
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return fwrite (buf, 1, len, stderr);
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}
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static void
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os_flush_stderr (host_callback *p ATTRIBUTE_UNUSED)
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{
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fflush (stderr);
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}
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static int
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os_rename (host_callback *p, const char *f1, const char *f2)
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{
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int result;
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result = rename (f1, f2);
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p->last_errno = errno;
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return result;
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}
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static int
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os_system (host_callback *p, const char *s)
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{
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int result;
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result = system (s);
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p->last_errno = errno;
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return result;
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}
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static int64_t
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os_time (host_callback *p)
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{
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int64_t result;
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result = time (NULL);
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p->last_errno = errno;
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return result;
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}
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static int
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os_unlink (host_callback *p, const char *f1)
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{
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int result;
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result = unlink (f1);
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p->last_errno = errno;
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return result;
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}
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static int
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os_stat (host_callback *p, const char *file, struct stat *buf)
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{
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int result;
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/* ??? There is an issue of when to translate to the target layout.
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One could do that inside this function, or one could have the
|
||
caller do it. It's more flexible to let the caller do it, though
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I'm not sure the flexibility will ever be useful. */
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result = stat (file, buf);
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p->last_errno = errno;
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return result;
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}
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static int
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os_fstat (host_callback *p, int fd, struct stat *buf)
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{
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int result;
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if (fdbad (p, fd))
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return -1;
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|
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if (p->ispipe[fd])
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{
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#if defined (HAVE_STRUCT_STAT_ST_ATIME) || defined (HAVE_STRUCT_STAT_ST_CTIME) || defined (HAVE_STRUCT_STAT_ST_MTIME)
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time_t t = (*p->time) (p);
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#endif
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/* We have to fake the struct stat contents, since the pipe is
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made up in the simulator. */
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memset (buf, 0, sizeof (*buf));
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#ifdef HAVE_STRUCT_STAT_ST_MODE
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buf->st_mode = S_IFIFO;
|
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#endif
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/* If more accurate tracking than current-time is needed (for
|
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example, on GNU/Linux we get accurate numbers), the p->time
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callback (which may be something other than os_time) should
|
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happen for each read and write, and we'd need to keep track of
|
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atime, ctime and mtime. */
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||
#ifdef HAVE_STRUCT_STAT_ST_ATIME
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buf->st_atime = t;
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_CTIME
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buf->st_ctime = t;
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_MTIME
|
||
buf->st_mtime = t;
|
||
#endif
|
||
return 0;
|
||
}
|
||
|
||
/* ??? There is an issue of when to translate to the target layout.
|
||
One could do that inside this function, or one could have the
|
||
caller do it. It's more flexible to let the caller do it, though
|
||
I'm not sure the flexibility will ever be useful. */
|
||
result = fstat (fdmap (p, fd), buf);
|
||
p->last_errno = errno;
|
||
return result;
|
||
}
|
||
|
||
static int
|
||
os_lstat (host_callback *p, const char *file, struct stat *buf)
|
||
{
|
||
int result;
|
||
|
||
/* NOTE: hpn/2004-12-12: Same issue here as with os_fstat. */
|
||
#ifdef HAVE_LSTAT
|
||
result = lstat (file, buf);
|
||
#else
|
||
result = stat (file, buf);
|
||
#endif
|
||
p->last_errno = errno;
|
||
return result;
|
||
}
|
||
|
||
static int
|
||
os_ftruncate (host_callback *p, int fd, int64_t len)
|
||
{
|
||
int result;
|
||
|
||
result = fdbad (p, fd);
|
||
if (p->ispipe[fd])
|
||
{
|
||
p->last_errno = EINVAL;
|
||
return -1;
|
||
}
|
||
if (result)
|
||
return result;
|
||
#ifdef HAVE_FTRUNCATE
|
||
result = ftruncate (fdmap (p, fd), len);
|
||
p->last_errno = errno;
|
||
#else
|
||
p->last_errno = EINVAL;
|
||
result = -1;
|
||
#endif
|
||
return result;
|
||
}
|
||
|
||
static int
|
||
os_truncate (host_callback *p, const char *file, int64_t len)
|
||
{
|
||
#ifdef HAVE_TRUNCATE
|
||
int result;
|
||
|
||
result = truncate (file, len);
|
||
p->last_errno = errno;
|
||
return result;
|
||
#else
|
||
p->last_errno = EINVAL;
|
||
return -1;
|
||
#endif
|
||
}
|
||
|
||
static int
|
||
os_getpid (host_callback *p)
|
||
{
|
||
int result;
|
||
|
||
result = getpid ();
|
||
/* POSIX says getpid always succeeds. */
|
||
p->last_errno = 0;
|
||
return result;
|
||
}
|
||
|
||
static int
|
||
os_kill (host_callback *p, int pid, int signum)
|
||
{
|
||
#ifdef HAVE_KILL
|
||
int result;
|
||
|
||
result = kill (pid, signum);
|
||
p->last_errno = errno;
|
||
return result;
|
||
#else
|
||
p->last_errno = ENOSYS;
|
||
return -1;
|
||
#endif
|
||
}
|
||
|
||
static int
|
||
os_pipe (host_callback *p, int *filedes)
|
||
{
|
||
int i;
|
||
|
||
/* We deliberately don't use fd 0. It's probably stdin anyway. */
|
||
for (i = 1; i < MAX_CALLBACK_FDS; i++)
|
||
{
|
||
int j;
|
||
|
||
if (p->fd_buddy[i] < 0)
|
||
for (j = i + 1; j < MAX_CALLBACK_FDS; j++)
|
||
if (p->fd_buddy[j] < 0)
|
||
{
|
||
/* Found two free fd:s. Set stat to allocated and mark
|
||
pipeness. */
|
||
p->fd_buddy[i] = i;
|
||
p->fd_buddy[j] = j;
|
||
p->ispipe[i] = j;
|
||
p->ispipe[j] = -i;
|
||
filedes[0] = i;
|
||
filedes[1] = j;
|
||
|
||
/* Poison the FD map to make bugs apparent. */
|
||
p->fdmap[i] = -1;
|
||
p->fdmap[j] = -1;
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
p->last_errno = EMFILE;
|
||
return -1;
|
||
}
|
||
|
||
/* Stub functions for pipe support. They should always be overridden in
|
||
targets using the pipe support, but that's up to the target. */
|
||
|
||
/* Called when the simulator says that the pipe at (reader, writer) is
|
||
now empty (so the writer should leave its waiting state). */
|
||
|
||
static void
|
||
os_pipe_empty (host_callback *p, int reader, int writer)
|
||
{
|
||
}
|
||
|
||
/* Called when the simulator says the pipe at (reader, writer) is now
|
||
non-empty (so the writer should wait). */
|
||
|
||
static void
|
||
os_pipe_nonempty (host_callback *p, int reader, int writer)
|
||
{
|
||
}
|
||
|
||
static int
|
||
os_shutdown (host_callback *p)
|
||
{
|
||
int i, next, j;
|
||
for (i = 0; i < MAX_CALLBACK_FDS; i++)
|
||
{
|
||
int do_close = 1;
|
||
|
||
/* Zero out all pipe state. Don't call callbacks for non-empty
|
||
pipes; the target program has likely terminated at this point
|
||
or we're called at initialization time. */
|
||
p->ispipe[i] = 0;
|
||
p->pipe_buffer[i].size = 0;
|
||
p->pipe_buffer[i].buffer = NULL;
|
||
|
||
next = p->fd_buddy[i];
|
||
if (next < 0)
|
||
continue;
|
||
do
|
||
{
|
||
j = next;
|
||
if (j == MAX_CALLBACK_FDS)
|
||
do_close = 0;
|
||
next = p->fd_buddy[j];
|
||
p->fd_buddy[j] = -1;
|
||
/* At the initial call of os_init, we got -1, 0, 0, 0, ... */
|
||
if (next < 0)
|
||
{
|
||
p->fd_buddy[i] = -1;
|
||
do_close = 0;
|
||
break;
|
||
}
|
||
}
|
||
while (j != i);
|
||
if (do_close)
|
||
close (p->fdmap[i]);
|
||
}
|
||
return 1;
|
||
}
|
||
|
||
static int
|
||
os_init (host_callback *p)
|
||
{
|
||
int i;
|
||
|
||
os_shutdown (p);
|
||
for (i = 0; i < 3; i++)
|
||
{
|
||
p->fdmap[i] = i;
|
||
p->fd_buddy[i] = i - 1;
|
||
}
|
||
p->fd_buddy[0] = MAX_CALLBACK_FDS;
|
||
p->fd_buddy[MAX_CALLBACK_FDS] = 2;
|
||
|
||
p->syscall_map = cb_init_syscall_map;
|
||
p->errno_map = cb_init_errno_map;
|
||
p->signal_map = cb_init_signal_map;
|
||
p->open_map = cb_init_open_map;
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* DEPRECATED */
|
||
|
||
/* VARARGS */
|
||
static void ATTRIBUTE_PRINTF (2, 3)
|
||
os_printf_filtered (host_callback *p ATTRIBUTE_UNUSED, const char *format, ...)
|
||
{
|
||
va_list args;
|
||
va_start (args, format);
|
||
|
||
vfprintf (stdout, format, args);
|
||
va_end (args);
|
||
}
|
||
|
||
/* VARARGS */
|
||
static void ATTRIBUTE_PRINTF (2, 0)
|
||
os_vprintf_filtered (host_callback *p ATTRIBUTE_UNUSED, const char *format, va_list args)
|
||
{
|
||
vprintf (format, args);
|
||
}
|
||
|
||
/* VARARGS */
|
||
static void ATTRIBUTE_PRINTF (2, 0)
|
||
os_evprintf_filtered (host_callback *p ATTRIBUTE_UNUSED, const char *format, va_list args)
|
||
{
|
||
vfprintf (stderr, format, args);
|
||
}
|
||
|
||
/* VARARGS */
|
||
static void ATTRIBUTE_PRINTF (2, 3) ATTRIBUTE_NORETURN
|
||
os_error (host_callback *p ATTRIBUTE_UNUSED, const char *format, ...)
|
||
{
|
||
va_list args;
|
||
va_start (args, format);
|
||
|
||
vfprintf (stderr, format, args);
|
||
fprintf (stderr, "\n");
|
||
|
||
va_end (args);
|
||
exit (1);
|
||
}
|
||
|
||
host_callback default_callback =
|
||
{
|
||
os_close,
|
||
os_get_errno,
|
||
os_isatty,
|
||
os_lseek,
|
||
os_open,
|
||
os_read,
|
||
os_read_stdin,
|
||
os_rename,
|
||
os_system,
|
||
os_time,
|
||
os_unlink,
|
||
os_write,
|
||
os_write_stdout,
|
||
os_flush_stdout,
|
||
os_write_stderr,
|
||
os_flush_stderr,
|
||
|
||
os_stat,
|
||
os_fstat,
|
||
os_lstat,
|
||
|
||
os_ftruncate,
|
||
os_truncate,
|
||
|
||
os_getpid,
|
||
os_kill,
|
||
|
||
os_pipe,
|
||
os_pipe_empty,
|
||
os_pipe_nonempty,
|
||
|
||
os_poll_quit,
|
||
|
||
os_shutdown,
|
||
os_init,
|
||
|
||
os_printf_filtered, /* deprecated */
|
||
|
||
os_vprintf_filtered,
|
||
os_evprintf_filtered,
|
||
os_error,
|
||
|
||
0, /* last errno */
|
||
|
||
{ 0, }, /* fdmap */
|
||
{ -1, }, /* fd_buddy */
|
||
{ 0, }, /* ispipe */
|
||
{ { 0, 0 }, }, /* pipe_buffer */
|
||
|
||
0, /* syscall_map */
|
||
0, /* errno_map */
|
||
0, /* open_map */
|
||
0, /* signal_map */
|
||
0, /* stat_map */
|
||
|
||
/* Defaults expected to be overridden at initialization, where needed. */
|
||
BFD_ENDIAN_UNKNOWN, /* target_endian */
|
||
NULL, /* argv */
|
||
NULL, /* envp */
|
||
4, /* target_sizeof_int */
|
||
|
||
HOST_CALLBACK_MAGIC,
|
||
};
|
||
|
||
/* Read in a file describing the target's system call values.
|
||
E.g. maybe someone will want to use something other than newlib.
|
||
This assumes that the basic system call recognition and value passing/
|
||
returning is supported. So maybe some coding/recompilation will be
|
||
necessary, but not as much.
|
||
|
||
If an error occurs, the existing mapping is not changed. */
|
||
|
||
CB_RC
|
||
cb_read_target_syscall_maps (host_callback *cb, const char *file)
|
||
{
|
||
CB_TARGET_DEFS_MAP *syscall_map, *errno_map, *open_map, *signal_map;
|
||
const char *stat_map;
|
||
FILE *f;
|
||
|
||
if ((f = fopen (file, "r")) == NULL)
|
||
return CB_RC_ACCESS;
|
||
|
||
/* ... read in and parse file ... */
|
||
|
||
fclose (f);
|
||
return CB_RC_NO_MEM; /* FIXME:wip */
|
||
|
||
/* Free storage allocated for any existing maps. */
|
||
if (cb->syscall_map)
|
||
free (cb->syscall_map);
|
||
if (cb->errno_map)
|
||
free (cb->errno_map);
|
||
if (cb->open_map)
|
||
free (cb->open_map);
|
||
if (cb->signal_map)
|
||
free (cb->signal_map);
|
||
if (cb->stat_map)
|
||
free ((PTR) cb->stat_map);
|
||
|
||
cb->syscall_map = syscall_map;
|
||
cb->errno_map = errno_map;
|
||
cb->open_map = open_map;
|
||
cb->signal_map = signal_map;
|
||
cb->stat_map = stat_map;
|
||
|
||
return CB_RC_OK;
|
||
}
|
||
|
||
/* General utility functions to search a map for a value. */
|
||
|
||
static const CB_TARGET_DEFS_MAP *
|
||
cb_target_map_entry (const CB_TARGET_DEFS_MAP map[], int target_val)
|
||
{
|
||
const CB_TARGET_DEFS_MAP *m;
|
||
|
||
for (m = &map[0]; m->target_val != -1; ++m)
|
||
if (m->target_val == target_val)
|
||
return m;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static const CB_TARGET_DEFS_MAP *
|
||
cb_host_map_entry (const CB_TARGET_DEFS_MAP map[], int host_val)
|
||
{
|
||
const CB_TARGET_DEFS_MAP *m;
|
||
|
||
for (m = &map[0]; m->host_val != -1; ++m)
|
||
if (m->host_val == host_val)
|
||
return m;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Translate the target's version of a syscall number to the host's.
|
||
This isn't actually the host's version, rather a canonical form.
|
||
??? Perhaps this should be renamed to ..._canon_syscall. */
|
||
|
||
int
|
||
cb_target_to_host_syscall (host_callback *cb, int target_val)
|
||
{
|
||
const CB_TARGET_DEFS_MAP *m =
|
||
cb_target_map_entry (cb->syscall_map, target_val);
|
||
|
||
return m ? m->host_val : -1;
|
||
}
|
||
|
||
/* FIXME: sort tables if large.
|
||
Alternatively, an obvious improvement for errno conversion is
|
||
to machine generate a function with a large switch(). */
|
||
|
||
/* Translate the host's version of errno to the target's. */
|
||
|
||
int
|
||
cb_host_to_target_errno (host_callback *cb, int host_val)
|
||
{
|
||
const CB_TARGET_DEFS_MAP *m = cb_host_map_entry (cb->errno_map, host_val);
|
||
|
||
/* ??? Which error to return in this case is up for grabs.
|
||
Note that some missing values may have standard alternatives.
|
||
For now return 0 and require caller to deal with it. */
|
||
return m ? m->target_val : 0;
|
||
}
|
||
|
||
/* Given a set of target bitmasks for the open system call,
|
||
return the host equivalent.
|
||
Mapping open flag values is best done by looping so there's no need
|
||
to machine generate this function. */
|
||
|
||
int
|
||
cb_target_to_host_open (host_callback *cb, int target_val)
|
||
{
|
||
int host_val = 0;
|
||
CB_TARGET_DEFS_MAP *m;
|
||
int o_rdonly = 0;
|
||
int o_wronly = 0;
|
||
int o_rdwr = 0;
|
||
int o_binary = 0;
|
||
int o_rdwrmask;
|
||
|
||
/* O_RDONLY can be (and usually is) 0 which needs to be treated specially. */
|
||
for (m = &cb->open_map[0]; m->host_val != -1; ++m)
|
||
{
|
||
if (!strcmp (m->name, "O_RDONLY"))
|
||
o_rdonly = m->target_val;
|
||
else if (!strcmp (m->name, "O_WRONLY"))
|
||
o_wronly = m->target_val;
|
||
else if (!strcmp (m->name, "O_RDWR"))
|
||
o_rdwr = m->target_val;
|
||
else if (!strcmp (m->name, "O_BINARY"))
|
||
o_binary = m->target_val;
|
||
}
|
||
o_rdwrmask = o_rdonly | o_wronly | o_rdwr;
|
||
|
||
for (m = &cb->open_map[0]; m->host_val != -1; ++m)
|
||
{
|
||
if (m->target_val == o_rdonly || m->target_val == o_wronly
|
||
|| m->target_val == o_rdwr)
|
||
{
|
||
if ((target_val & o_rdwrmask) == m->target_val)
|
||
host_val |= m->host_val;
|
||
/* Handle the host/target differentiating between binary and
|
||
text mode. Only one case is of importance */
|
||
#ifdef O_BINARY
|
||
if (o_binary == 0)
|
||
host_val |= O_BINARY;
|
||
#endif
|
||
}
|
||
else
|
||
{
|
||
if ((m->target_val & target_val) == m->target_val)
|
||
host_val |= m->host_val;
|
||
}
|
||
}
|
||
|
||
return host_val;
|
||
}
|
||
|
||
/* Translate the target's version of a signal number to the host's.
|
||
This isn't actually the host's version, rather a canonical form.
|
||
??? Perhaps this should be renamed to ..._canon_signal. */
|
||
|
||
int
|
||
cb_target_to_host_signal (host_callback *cb, int target_val)
|
||
{
|
||
const CB_TARGET_DEFS_MAP *m =
|
||
cb_target_map_entry (cb->signal_map, target_val);
|
||
|
||
return m ? m->host_val : -1;
|
||
}
|
||
|
||
/* Utility for e.g. cb_host_to_target_stat to store values in the target's
|
||
stat struct.
|
||
|
||
??? The "val" must be as big as target word size. */
|
||
|
||
void
|
||
cb_store_target_endian (host_callback *cb, char *p, int size, long val)
|
||
{
|
||
if (cb->target_endian == BFD_ENDIAN_BIG)
|
||
{
|
||
p += size;
|
||
while (size-- > 0)
|
||
{
|
||
*--p = val;
|
||
val >>= 8;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
while (size-- > 0)
|
||
{
|
||
*p++ = val;
|
||
val >>= 8;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Translate a host's stat struct into a target's.
|
||
If HS is NULL, just compute the length of the buffer required,
|
||
TS is ignored.
|
||
|
||
The result is the size of the target's stat struct,
|
||
or zero if an error occurred during the translation. */
|
||
|
||
int
|
||
cb_host_to_target_stat (host_callback *cb, const struct stat *hs, void *ts)
|
||
{
|
||
const char *m = cb->stat_map;
|
||
char *p;
|
||
|
||
if (hs == NULL)
|
||
ts = NULL;
|
||
p = ts;
|
||
|
||
while (m)
|
||
{
|
||
char *q = strchr (m, ',');
|
||
int size;
|
||
|
||
/* FIXME: Use sscanf? */
|
||
if (q == NULL)
|
||
{
|
||
/* FIXME: print error message */
|
||
return 0;
|
||
}
|
||
size = atoi (q + 1);
|
||
if (size == 0)
|
||
{
|
||
/* FIXME: print error message */
|
||
return 0;
|
||
}
|
||
|
||
if (hs != NULL)
|
||
{
|
||
if (0)
|
||
;
|
||
/* Defined here to avoid emacs indigestion on a lone "else". */
|
||
#undef ST_x
|
||
#define ST_x(FLD) \
|
||
else if (strncmp (m, #FLD, q - m) == 0) \
|
||
cb_store_target_endian (cb, p, size, hs->FLD)
|
||
|
||
#ifdef HAVE_STRUCT_STAT_ST_DEV
|
||
ST_x (st_dev);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_INO
|
||
ST_x (st_ino);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_MODE
|
||
ST_x (st_mode);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_NLINK
|
||
ST_x (st_nlink);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_UID
|
||
ST_x (st_uid);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_GID
|
||
ST_x (st_gid);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_RDEV
|
||
ST_x (st_rdev);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_SIZE
|
||
ST_x (st_size);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
|
||
ST_x (st_blksize);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_BLOCKS
|
||
ST_x (st_blocks);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_ATIME
|
||
ST_x (st_atime);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_MTIME
|
||
ST_x (st_mtime);
|
||
#endif
|
||
#ifdef HAVE_STRUCT_STAT_ST_CTIME
|
||
ST_x (st_ctime);
|
||
#endif
|
||
#undef ST_x
|
||
/* FIXME:wip */
|
||
else
|
||
/* Unsupported field, store 0. */
|
||
cb_store_target_endian (cb, p, size, 0);
|
||
}
|
||
|
||
p += size;
|
||
m = strchr (q, ':');
|
||
if (m)
|
||
++m;
|
||
}
|
||
|
||
return p - (char *) ts;
|
||
}
|
||
|
||
int
|
||
cb_is_stdin (host_callback *cb, int fd)
|
||
{
|
||
return fdbad (cb, fd) ? 0 : fdmap (cb, fd) == 0;
|
||
}
|
||
|
||
int
|
||
cb_is_stdout (host_callback *cb, int fd)
|
||
{
|
||
return fdbad (cb, fd) ? 0 : fdmap (cb, fd) == 1;
|
||
}
|
||
|
||
int
|
||
cb_is_stderr (host_callback *cb, int fd)
|
||
{
|
||
return fdbad (cb, fd) ? 0 : fdmap (cb, fd) == 2;
|
||
}
|
||
|
||
const char *
|
||
cb_host_str_syscall (host_callback *cb, int host_val)
|
||
{
|
||
const CB_TARGET_DEFS_MAP *m = cb_host_map_entry (cb->syscall_map, host_val);
|
||
|
||
return m ? m->name : NULL;
|
||
}
|
||
|
||
const char *
|
||
cb_host_str_errno (host_callback *cb, int host_val)
|
||
{
|
||
const CB_TARGET_DEFS_MAP *m = cb_host_map_entry (cb->errno_map, host_val);
|
||
|
||
return m ? m->name : NULL;
|
||
}
|
||
|
||
const char *
|
||
cb_host_str_signal (host_callback *cb, int host_val)
|
||
{
|
||
const CB_TARGET_DEFS_MAP *m = cb_host_map_entry (cb->signal_map, host_val);
|
||
|
||
return m ? m->name : NULL;
|
||
}
|
||
|
||
const char *
|
||
cb_target_str_syscall (host_callback *cb, int target_val)
|
||
{
|
||
const CB_TARGET_DEFS_MAP *m =
|
||
cb_target_map_entry (cb->syscall_map, target_val);
|
||
|
||
return m ? m->name : NULL;
|
||
}
|
||
|
||
const char *
|
||
cb_target_str_errno (host_callback *cb, int target_val)
|
||
{
|
||
const CB_TARGET_DEFS_MAP *m =
|
||
cb_target_map_entry (cb->errno_map, target_val);
|
||
|
||
return m ? m->name : NULL;
|
||
}
|
||
|
||
const char *
|
||
cb_target_str_signal (host_callback *cb, int target_val)
|
||
{
|
||
const CB_TARGET_DEFS_MAP *m =
|
||
cb_target_map_entry (cb->signal_map, target_val);
|
||
|
||
return m ? m->name : NULL;
|
||
}
|