1431 lines
38 KiB
C
1431 lines
38 KiB
C
/* Support for connecting Guile's stdio to GDB's.
|
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as well as r/w memory via ports.
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Copyright (C) 2014-2016 Free Software Foundation, Inc.
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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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/* See README file in this directory for implementation notes, coding
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conventions, et.al. */
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#include "defs.h"
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#include "gdb_select.h"
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#include "top.h"
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#include "target.h"
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#include "guile-internal.h"
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#ifdef HAVE_POLL
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#if defined (HAVE_POLL_H)
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#include <poll.h>
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#elif defined (HAVE_SYS_POLL_H)
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#include <sys/poll.h>
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#endif
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#endif
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/* A ui-file for sending output to Guile. */
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typedef struct
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{
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int *magic;
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SCM port;
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} ioscm_file_port;
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/* Data for a memory port. */
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typedef struct
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{
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/* Bounds of memory range this port is allowed to access: [start, end).
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This means that 0xff..ff is not accessible. I can live with that. */
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CORE_ADDR start, end;
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/* (end - start), recorded for convenience. */
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ULONGEST size;
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/* Think of this as the lseek value maintained by the kernel.
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This value is always in the range [0, size]. */
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ULONGEST current;
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/* The size of the internal r/w buffers.
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Scheme ports aren't a straightforward mapping to memory r/w.
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Generally the user specifies how much to r/w and all access is
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unbuffered. We don't try to provide equivalent access, but we allow
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the user to specify these values to help get something similar. */
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unsigned read_buf_size, write_buf_size;
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} ioscm_memory_port;
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/* Copies of the original system input/output/error ports.
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These are recorded for debugging purposes. */
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static SCM orig_input_port_scm;
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static SCM orig_output_port_scm;
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static SCM orig_error_port_scm;
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/* This is the stdio port descriptor, scm_ptob_descriptor. */
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static scm_t_bits stdio_port_desc;
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/* Note: scm_make_port_type takes a char * instead of a const char *. */
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static /*const*/ char stdio_port_desc_name[] = "gdb:stdio-port";
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/* Names of each gdb port. */
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static const char input_port_name[] = "gdb:stdin";
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static const char output_port_name[] = "gdb:stdout";
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static const char error_port_name[] = "gdb:stderr";
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/* This is the actual port used from Guile.
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We don't expose these to the user though, to ensure they're not
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overwritten. */
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static SCM input_port_scm;
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static SCM output_port_scm;
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static SCM error_port_scm;
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/* Magic number to identify port ui-files.
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Actually, the address of this variable is the magic number. */
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static int file_port_magic;
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/* Internal enum for specifying output port. */
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enum oport { GDB_STDOUT, GDB_STDERR };
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/* This is the memory port descriptor, scm_ptob_descriptor. */
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static scm_t_bits memory_port_desc;
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/* Note: scm_make_port_type takes a char * instead of a const char *. */
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static /*const*/ char memory_port_desc_name[] = "gdb:memory-port";
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/* The default amount of memory to fetch for each read/write request.
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Scheme ports don't provide a way to specify the size of a read,
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which is important to us to minimize the number of inferior interactions,
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which over a remote link can be important. To compensate we augment the
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port API with a new function that let's the user specify how much the next
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read request should fetch. This is the initial value for each new port. */
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static const unsigned default_read_buf_size = 16;
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static const unsigned default_write_buf_size = 16;
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/* Arbitrarily limit memory port buffers to 1 byte to 4K. */
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static const unsigned min_memory_port_buf_size = 1;
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static const unsigned max_memory_port_buf_size = 4096;
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/* "out of range" error message for buf sizes. */
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static char *out_of_range_buf_size;
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/* Keywords used by open-memory. */
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static SCM mode_keyword;
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static SCM start_keyword;
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static SCM size_keyword;
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/* Helper to do the low level work of opening a port.
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Newer versions of Guile (2.1.x) have scm_c_make_port. */
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static SCM
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ioscm_open_port (scm_t_bits port_type, long mode_bits)
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{
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SCM port;
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#if 0 /* TODO: Guile doesn't export this. What to do? */
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scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex);
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#endif
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port = scm_new_port_table_entry (port_type);
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SCM_SET_CELL_TYPE (port, port_type | mode_bits);
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#if 0 /* TODO: Guile doesn't export this. What to do? */
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scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
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#endif
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return port;
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}
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/* Support for connecting Guile's stdio ports to GDB's stdio ports. */
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/* The scm_t_ptob_descriptor.input_waiting "method".
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Return a lower bound on the number of bytes available for input. */
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static int
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ioscm_input_waiting (SCM port)
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{
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int fdes = 0;
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if (! scm_is_eq (port, input_port_scm))
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return 0;
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#ifdef HAVE_POLL
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{
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/* This is copied from libguile/fports.c. */
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struct pollfd pollfd = { fdes, POLLIN, 0 };
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static int use_poll = -1;
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if (use_poll < 0)
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{
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/* This is copied from event-loop.c: poll cannot be used for stdin on
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m68k-motorola-sysv. */
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struct pollfd test_pollfd = { fdes, POLLIN, 0 };
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if (poll (&test_pollfd, 1, 0) == 1 && (test_pollfd.revents & POLLNVAL))
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use_poll = 0;
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else
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use_poll = 1;
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}
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if (use_poll)
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{
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/* Guile doesn't export SIGINT hooks like Python does.
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For now pass EINTR to scm_syserror, that's what fports.c does. */
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if (poll (&pollfd, 1, 0) < 0)
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scm_syserror (FUNC_NAME);
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return pollfd.revents & POLLIN ? 1 : 0;
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}
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}
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/* Fall through. */
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#endif
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{
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struct timeval timeout;
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fd_set input_fds;
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int num_fds = fdes + 1;
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int num_found;
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memset (&timeout, 0, sizeof (timeout));
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FD_ZERO (&input_fds);
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FD_SET (fdes, &input_fds);
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num_found = interruptible_select (num_fds,
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&input_fds, NULL, NULL,
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&timeout);
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if (num_found < 0)
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{
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/* Guile doesn't export SIGINT hooks like Python does.
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For now pass EINTR to scm_syserror, that's what fports.c does. */
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scm_syserror (FUNC_NAME);
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}
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return num_found > 0 && FD_ISSET (fdes, &input_fds);
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}
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}
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/* The scm_t_ptob_descriptor.fill_input "method". */
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static int
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ioscm_fill_input (SCM port)
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{
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/* Borrowed from libguile/fports.c. */
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long count;
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scm_t_port *pt = SCM_PTAB_ENTRY (port);
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/* If we're called on stdout,stderr, punt. */
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if (! scm_is_eq (port, input_port_scm))
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return (scm_t_wchar) EOF; /* Set errno and return -1? */
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gdb_flush (gdb_stdout);
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gdb_flush (gdb_stderr);
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count = ui_file_read (gdb_stdin, (char *) pt->read_buf, pt->read_buf_size);
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if (count == -1)
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scm_syserror (FUNC_NAME);
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if (count == 0)
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return (scm_t_wchar) EOF;
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pt->read_pos = pt->read_buf;
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pt->read_end = pt->read_buf + count;
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return *pt->read_buf;
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}
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/* Like fputstrn_filtered, but don't escape characters, except nul.
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Also like fputs_filtered, but a length is specified. */
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static void
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fputsn_filtered (const char *s, size_t size, struct ui_file *stream)
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{
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size_t i;
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for (i = 0; i < size; ++i)
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{
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if (s[i] == '\0')
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fputs_filtered ("\\000", stream);
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else
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fputc_filtered (s[i], stream);
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}
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}
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/* Write to gdb's stdout or stderr. */
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static void
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ioscm_write (SCM port, const void *data, size_t size)
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{
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/* If we're called on stdin, punt. */
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if (scm_is_eq (port, input_port_scm))
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return;
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TRY
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{
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if (scm_is_eq (port, error_port_scm))
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fputsn_filtered ((const char *) data, size, gdb_stderr);
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else
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fputsn_filtered ((const char *) data, size, gdb_stdout);
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}
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CATCH (except, RETURN_MASK_ALL)
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{
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GDBSCM_HANDLE_GDB_EXCEPTION (except);
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}
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END_CATCH
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}
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/* Flush gdb's stdout or stderr. */
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static void
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ioscm_flush (SCM port)
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{
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/* If we're called on stdin, punt. */
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if (scm_is_eq (port, input_port_scm))
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return;
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if (scm_is_eq (port, error_port_scm))
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gdb_flush (gdb_stderr);
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else
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gdb_flush (gdb_stdout);
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}
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/* Initialize the gdb stdio port type.
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N.B. isatty? will fail on these ports, it is only supported for file
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ports. IWBN if we could "subclass" file ports. */
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static void
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ioscm_init_gdb_stdio_port (void)
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{
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stdio_port_desc = scm_make_port_type (stdio_port_desc_name,
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ioscm_fill_input, ioscm_write);
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scm_set_port_input_waiting (stdio_port_desc, ioscm_input_waiting);
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scm_set_port_flush (stdio_port_desc, ioscm_flush);
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}
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/* Subroutine of ioscm_make_gdb_stdio_port to simplify it.
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Set up the buffers of port PORT.
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MODE_BITS are the mode bits of PORT. */
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static void
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ioscm_init_stdio_buffers (SCM port, long mode_bits)
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{
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scm_t_port *pt = SCM_PTAB_ENTRY (port);
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#define GDB_STDIO_BUFFER_DEFAULT_SIZE 1024
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int size = mode_bits & SCM_BUF0 ? 0 : GDB_STDIO_BUFFER_DEFAULT_SIZE;
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int writing = (mode_bits & SCM_WRTNG) != 0;
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/* This is heavily copied from scm_fport_buffer_add. */
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if (!writing && size > 0)
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{
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pt->read_buf
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= (unsigned char *) scm_gc_malloc_pointerless (size, "port buffer");
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pt->read_pos = pt->read_end = pt->read_buf;
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pt->read_buf_size = size;
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}
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else
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{
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pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf;
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pt->read_buf_size = 1;
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}
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if (writing && size > 0)
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{
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pt->write_buf
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= (unsigned char *) scm_gc_malloc_pointerless (size, "port buffer");
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pt->write_pos = pt->write_buf;
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pt->write_buf_size = size;
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}
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else
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{
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pt->write_buf = pt->write_pos = &pt->shortbuf;
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pt->write_buf_size = 1;
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}
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pt->write_end = pt->write_buf + pt->write_buf_size;
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}
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/* Create a gdb stdio port. */
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static SCM
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ioscm_make_gdb_stdio_port (int fd)
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{
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int is_a_tty = isatty (fd);
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const char *name;
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const char *mode_str;
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long mode_bits;
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SCM port;
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switch (fd)
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{
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case 0:
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name = input_port_name;
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mode_str = is_a_tty ? "r0" : "r";
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break;
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case 1:
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name = output_port_name;
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mode_str = is_a_tty ? "w0" : "w";
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break;
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case 2:
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name = error_port_name;
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mode_str = is_a_tty ? "w0" : "w";
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break;
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default:
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gdb_assert_not_reached ("bad stdio file descriptor");
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}
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mode_bits = scm_mode_bits ((char *) mode_str);
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port = ioscm_open_port (stdio_port_desc, mode_bits);
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scm_set_port_filename_x (port, gdbscm_scm_from_c_string (name));
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ioscm_init_stdio_buffers (port, mode_bits);
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return port;
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}
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/* (stdio-port? object) -> boolean */
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static SCM
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gdbscm_stdio_port_p (SCM scm)
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{
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/* This is copied from SCM_FPORTP. */
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return scm_from_bool (!SCM_IMP (scm)
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&& (SCM_TYP16 (scm) == stdio_port_desc));
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}
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/* GDB's ports are accessed via functions to keep them read-only. */
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/* (input-port) -> port */
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||
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static SCM
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gdbscm_input_port (void)
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{
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return input_port_scm;
|
||
}
|
||
|
||
/* (output-port) -> port */
|
||
|
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static SCM
|
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gdbscm_output_port (void)
|
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{
|
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return output_port_scm;
|
||
}
|
||
|
||
/* (error-port) -> port */
|
||
|
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static SCM
|
||
gdbscm_error_port (void)
|
||
{
|
||
return error_port_scm;
|
||
}
|
||
|
||
/* Support for sending GDB I/O to Guile ports. */
|
||
|
||
static void
|
||
ioscm_file_port_delete (struct ui_file *file)
|
||
{
|
||
ioscm_file_port *stream = (ioscm_file_port *) ui_file_data (file);
|
||
|
||
if (stream->magic != &file_port_magic)
|
||
internal_error (__FILE__, __LINE__,
|
||
_("ioscm_file_port_delete: bad magic number"));
|
||
xfree (stream);
|
||
}
|
||
|
||
static void
|
||
ioscm_file_port_rewind (struct ui_file *file)
|
||
{
|
||
ioscm_file_port *stream = (ioscm_file_port *) ui_file_data (file);
|
||
|
||
if (stream->magic != &file_port_magic)
|
||
internal_error (__FILE__, __LINE__,
|
||
_("ioscm_file_port_rewind: bad magic number"));
|
||
|
||
scm_truncate_file (stream->port, 0);
|
||
}
|
||
|
||
static void
|
||
ioscm_file_port_put (struct ui_file *file,
|
||
ui_file_put_method_ftype *write,
|
||
void *dest)
|
||
{
|
||
ioscm_file_port *stream = (ioscm_file_port *) ui_file_data (file);
|
||
|
||
if (stream->magic != &file_port_magic)
|
||
internal_error (__FILE__, __LINE__,
|
||
_("ioscm_file_port_put: bad magic number"));
|
||
|
||
/* This function doesn't meld with ports very well. */
|
||
}
|
||
|
||
static void
|
||
ioscm_file_port_write (struct ui_file *file,
|
||
const char *buffer,
|
||
long length_buffer)
|
||
{
|
||
ioscm_file_port *stream = (ioscm_file_port *) ui_file_data (file);
|
||
|
||
if (stream->magic != &file_port_magic)
|
||
internal_error (__FILE__, __LINE__,
|
||
_("ioscm_pot_file_write: bad magic number"));
|
||
|
||
scm_c_write (stream->port, buffer, length_buffer);
|
||
}
|
||
|
||
/* Return a ui_file that writes to PORT. */
|
||
|
||
static struct ui_file *
|
||
ioscm_file_port_new (SCM port)
|
||
{
|
||
ioscm_file_port *stream = XCNEW (ioscm_file_port);
|
||
struct ui_file *file = ui_file_new ();
|
||
|
||
set_ui_file_data (file, stream, ioscm_file_port_delete);
|
||
set_ui_file_rewind (file, ioscm_file_port_rewind);
|
||
set_ui_file_put (file, ioscm_file_port_put);
|
||
set_ui_file_write (file, ioscm_file_port_write);
|
||
stream->magic = &file_port_magic;
|
||
stream->port = port;
|
||
|
||
return file;
|
||
}
|
||
|
||
/* Helper routine for with-{output,error}-to-port. */
|
||
|
||
static SCM
|
||
ioscm_with_output_to_port_worker (SCM port, SCM thunk, enum oport oport,
|
||
const char *func_name)
|
||
{
|
||
struct ui_file *port_file;
|
||
struct cleanup *cleanups;
|
||
SCM result;
|
||
|
||
SCM_ASSERT_TYPE (gdbscm_is_true (scm_output_port_p (port)), port,
|
||
SCM_ARG1, func_name, _("output port"));
|
||
SCM_ASSERT_TYPE (gdbscm_is_true (scm_thunk_p (thunk)), thunk,
|
||
SCM_ARG2, func_name, _("thunk"));
|
||
|
||
cleanups = set_batch_flag_and_make_cleanup_restore_page_info ();
|
||
|
||
make_cleanup_restore_integer (¤t_ui->async);
|
||
current_ui->async = 0;
|
||
|
||
port_file = ioscm_file_port_new (port);
|
||
|
||
make_cleanup_ui_file_delete (port_file);
|
||
|
||
if (oport == GDB_STDERR)
|
||
{
|
||
make_cleanup_restore_ui_file (&gdb_stderr);
|
||
gdb_stderr = port_file;
|
||
}
|
||
else
|
||
{
|
||
make_cleanup_restore_ui_file (&gdb_stdout);
|
||
|
||
if (ui_out_redirect (current_uiout, port_file) < 0)
|
||
warning (_("Current output protocol does not support redirection"));
|
||
else
|
||
make_cleanup_ui_out_redirect_pop (current_uiout);
|
||
|
||
gdb_stdout = port_file;
|
||
}
|
||
|
||
result = gdbscm_safe_call_0 (thunk, NULL);
|
||
|
||
do_cleanups (cleanups);
|
||
|
||
if (gdbscm_is_exception (result))
|
||
gdbscm_throw (result);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* (%with-gdb-output-to-port port thunk) -> object
|
||
This function is experimental.
|
||
IWBN to not include "gdb" in the name, but it would collide with a standard
|
||
procedure, and it's common to import the gdb module without a prefix.
|
||
There are ways around this, but they're more cumbersome.
|
||
|
||
This has % in the name because it's experimental, and we want the
|
||
user-visible version to come from module (gdb experimental). */
|
||
|
||
static SCM
|
||
gdbscm_percent_with_gdb_output_to_port (SCM port, SCM thunk)
|
||
{
|
||
return ioscm_with_output_to_port_worker (port, thunk, GDB_STDOUT, FUNC_NAME);
|
||
}
|
||
|
||
/* (%with-gdb-error-to-port port thunk) -> object
|
||
This function is experimental.
|
||
IWBN to not include "gdb" in the name, but it would collide with a standard
|
||
procedure, and it's common to import the gdb module without a prefix.
|
||
There are ways around this, but they're more cumbersome.
|
||
|
||
This has % in the name because it's experimental, and we want the
|
||
user-visible version to come from module (gdb experimental). */
|
||
|
||
static SCM
|
||
gdbscm_percent_with_gdb_error_to_port (SCM port, SCM thunk)
|
||
{
|
||
return ioscm_with_output_to_port_worker (port, thunk, GDB_STDERR, FUNC_NAME);
|
||
}
|
||
|
||
/* Support for r/w memory via ports. */
|
||
|
||
/* Perform an "lseek" to OFFSET,WHENCE on memory port IOMEM.
|
||
OFFSET must be in the range [0,size].
|
||
The result is non-zero for success, zero for failure. */
|
||
|
||
static int
|
||
ioscm_lseek_address (ioscm_memory_port *iomem, LONGEST offset, int whence)
|
||
{
|
||
CORE_ADDR new_current;
|
||
|
||
gdb_assert (iomem->current <= iomem->size);
|
||
|
||
switch (whence)
|
||
{
|
||
case SEEK_CUR:
|
||
/* Catch over/underflow. */
|
||
if ((offset < 0 && iomem->current + offset > iomem->current)
|
||
|| (offset > 0 && iomem->current + offset < iomem->current))
|
||
return 0;
|
||
new_current = iomem->current + offset;
|
||
break;
|
||
case SEEK_SET:
|
||
new_current = offset;
|
||
break;
|
||
case SEEK_END:
|
||
if (offset == 0)
|
||
{
|
||
new_current = iomem->size;
|
||
break;
|
||
}
|
||
/* TODO: Not supported yet. */
|
||
return 0;
|
||
default:
|
||
return 0;
|
||
}
|
||
|
||
if (new_current > iomem->size)
|
||
return 0;
|
||
iomem->current = new_current;
|
||
return 1;
|
||
}
|
||
|
||
/* "fill_input" method for memory ports. */
|
||
|
||
static int
|
||
gdbscm_memory_port_fill_input (SCM port)
|
||
{
|
||
scm_t_port *pt = SCM_PTAB_ENTRY (port);
|
||
ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
size_t to_read;
|
||
|
||
/* "current" is the offset of the first byte we want to read. */
|
||
gdb_assert (iomem->current <= iomem->size);
|
||
if (iomem->current == iomem->size)
|
||
return EOF;
|
||
|
||
/* Don't read outside the allowed memory range. */
|
||
to_read = pt->read_buf_size;
|
||
if (to_read > iomem->size - iomem->current)
|
||
to_read = iomem->size - iomem->current;
|
||
|
||
if (target_read_memory (iomem->start + iomem->current, pt->read_buf,
|
||
to_read) != 0)
|
||
gdbscm_memory_error (FUNC_NAME, _("error reading memory"), SCM_EOL);
|
||
|
||
iomem->current += to_read;
|
||
pt->read_pos = pt->read_buf;
|
||
pt->read_end = pt->read_buf + to_read;
|
||
return *pt->read_buf;
|
||
}
|
||
|
||
/* "end_input" method for memory ports.
|
||
Clear the read buffer and adjust the file position for unread bytes. */
|
||
|
||
static void
|
||
gdbscm_memory_port_end_input (SCM port, int offset)
|
||
{
|
||
scm_t_port *pt = SCM_PTAB_ENTRY (port);
|
||
ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
size_t remaining = pt->read_end - pt->read_pos;
|
||
|
||
/* Note: Use of "int offset" is specified by Guile ports API. */
|
||
if ((offset < 0 && remaining + offset > remaining)
|
||
|| (offset > 0 && remaining + offset < remaining))
|
||
{
|
||
gdbscm_out_of_range_error (FUNC_NAME, 0, scm_from_int (offset),
|
||
_("overflow in offset calculation"));
|
||
}
|
||
offset += remaining;
|
||
|
||
if (offset > 0)
|
||
{
|
||
pt->read_pos = pt->read_end;
|
||
/* Throw error if unread-char used at beginning of file
|
||
then attempting to write. Seems correct. */
|
||
if (!ioscm_lseek_address (iomem, -offset, SEEK_CUR))
|
||
{
|
||
gdbscm_out_of_range_error (FUNC_NAME, 0, scm_from_int (offset),
|
||
_("bad offset"));
|
||
}
|
||
}
|
||
|
||
pt->rw_active = SCM_PORT_NEITHER;
|
||
}
|
||
|
||
/* "flush" method for memory ports. */
|
||
|
||
static void
|
||
gdbscm_memory_port_flush (SCM port)
|
||
{
|
||
scm_t_port *pt = SCM_PTAB_ENTRY (port);
|
||
ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
size_t to_write = pt->write_pos - pt->write_buf;
|
||
|
||
if (to_write == 0)
|
||
return;
|
||
|
||
/* There's no way to indicate a short write, so if the request goes past
|
||
the end of the port's memory range, flag an error. */
|
||
if (to_write > iomem->size - iomem->current)
|
||
{
|
||
gdbscm_out_of_range_error (FUNC_NAME, 0,
|
||
gdbscm_scm_from_ulongest (to_write),
|
||
_("writing beyond end of memory range"));
|
||
}
|
||
|
||
if (target_write_memory (iomem->start + iomem->current, pt->write_buf,
|
||
to_write) != 0)
|
||
gdbscm_memory_error (FUNC_NAME, _("error writing memory"), SCM_EOL);
|
||
|
||
iomem->current += to_write;
|
||
pt->write_pos = pt->write_buf;
|
||
pt->rw_active = SCM_PORT_NEITHER;
|
||
}
|
||
|
||
/* "write" method for memory ports. */
|
||
|
||
static void
|
||
gdbscm_memory_port_write (SCM port, const void *void_data, size_t size)
|
||
{
|
||
scm_t_port *pt = SCM_PTAB_ENTRY (port);
|
||
ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
const gdb_byte *data = (const gdb_byte *) void_data;
|
||
|
||
/* There's no way to indicate a short write, so if the request goes past
|
||
the end of the port's memory range, flag an error. */
|
||
if (size > iomem->size - iomem->current)
|
||
{
|
||
gdbscm_out_of_range_error (FUNC_NAME, 0, gdbscm_scm_from_ulongest (size),
|
||
_("writing beyond end of memory range"));
|
||
}
|
||
|
||
if (pt->write_buf == &pt->shortbuf)
|
||
{
|
||
/* Unbuffered port. */
|
||
if (target_write_memory (iomem->start + iomem->current, data, size) != 0)
|
||
gdbscm_memory_error (FUNC_NAME, _("error writing memory"), SCM_EOL);
|
||
iomem->current += size;
|
||
return;
|
||
}
|
||
|
||
/* Note: The edge case of what to do when the buffer exactly fills is
|
||
debatable. Guile flushes when the buffer exactly fills up, so we
|
||
do too. It's counter-intuitive to my mind, but in case there's a
|
||
subtlety somewhere that depends on this, we do the same. */
|
||
|
||
{
|
||
size_t space = pt->write_end - pt->write_pos;
|
||
|
||
if (size < space)
|
||
{
|
||
/* Data fits in buffer, and does not fill it. */
|
||
memcpy (pt->write_pos, data, size);
|
||
pt->write_pos += size;
|
||
}
|
||
else
|
||
{
|
||
memcpy (pt->write_pos, data, space);
|
||
pt->write_pos = pt->write_end;
|
||
gdbscm_memory_port_flush (port);
|
||
{
|
||
const gdb_byte *ptr = data + space;
|
||
size_t remaining = size - space;
|
||
|
||
if (remaining >= pt->write_buf_size)
|
||
{
|
||
if (target_write_memory (iomem->start + iomem->current, ptr,
|
||
remaining) != 0)
|
||
gdbscm_memory_error (FUNC_NAME, _("error writing memory"),
|
||
SCM_EOL);
|
||
iomem->current += remaining;
|
||
}
|
||
else
|
||
{
|
||
memcpy (pt->write_pos, ptr, remaining);
|
||
pt->write_pos += remaining;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* "seek" method for memory ports. */
|
||
|
||
static scm_t_off
|
||
gdbscm_memory_port_seek (SCM port, scm_t_off offset, int whence)
|
||
{
|
||
scm_t_port *pt = SCM_PTAB_ENTRY (port);
|
||
ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
CORE_ADDR result;
|
||
int rc;
|
||
|
||
if (pt->rw_active == SCM_PORT_WRITE)
|
||
{
|
||
if (offset != 0 || whence != SEEK_CUR)
|
||
{
|
||
gdbscm_memory_port_flush (port);
|
||
rc = ioscm_lseek_address (iomem, offset, whence);
|
||
result = iomem->current;
|
||
}
|
||
else
|
||
{
|
||
/* Read current position without disturbing the buffer,
|
||
but flag an error if what's in the buffer goes outside the
|
||
allowed range. */
|
||
CORE_ADDR current = iomem->current;
|
||
size_t delta = pt->write_pos - pt->write_buf;
|
||
|
||
if (current + delta < current
|
||
|| current + delta > iomem->size)
|
||
rc = 0;
|
||
else
|
||
{
|
||
result = current + delta;
|
||
rc = 1;
|
||
}
|
||
}
|
||
}
|
||
else if (pt->rw_active == SCM_PORT_READ)
|
||
{
|
||
if (offset != 0 || whence != SEEK_CUR)
|
||
{
|
||
scm_end_input (port);
|
||
rc = ioscm_lseek_address (iomem, offset, whence);
|
||
result = iomem->current;
|
||
}
|
||
else
|
||
{
|
||
/* Read current position without disturbing the buffer
|
||
(particularly the unread-char buffer). */
|
||
CORE_ADDR current = iomem->current;
|
||
size_t remaining = pt->read_end - pt->read_pos;
|
||
|
||
if (current - remaining > current
|
||
|| current - remaining < iomem->start)
|
||
rc = 0;
|
||
else
|
||
{
|
||
result = current - remaining;
|
||
rc = 1;
|
||
}
|
||
|
||
if (rc != 0 && pt->read_buf == pt->putback_buf)
|
||
{
|
||
size_t saved_remaining = pt->saved_read_end - pt->saved_read_pos;
|
||
|
||
if (result - saved_remaining > result
|
||
|| result - saved_remaining < iomem->start)
|
||
rc = 0;
|
||
else
|
||
result -= saved_remaining;
|
||
}
|
||
}
|
||
}
|
||
else /* SCM_PORT_NEITHER */
|
||
{
|
||
rc = ioscm_lseek_address (iomem, offset, whence);
|
||
result = iomem->current;
|
||
}
|
||
|
||
if (rc == 0)
|
||
{
|
||
gdbscm_out_of_range_error (FUNC_NAME, 0,
|
||
gdbscm_scm_from_longest (offset),
|
||
_("bad seek"));
|
||
}
|
||
|
||
/* TODO: The Guile API doesn't support 32x64. We can't fix that here,
|
||
and there's no need to throw an error if the new address can't be
|
||
represented in a scm_t_off. But we could return something less
|
||
clumsy. */
|
||
return result;
|
||
}
|
||
|
||
/* "close" method for memory ports. */
|
||
|
||
static int
|
||
gdbscm_memory_port_close (SCM port)
|
||
{
|
||
scm_t_port *pt = SCM_PTAB_ENTRY (port);
|
||
ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
|
||
gdbscm_memory_port_flush (port);
|
||
|
||
if (pt->read_buf == pt->putback_buf)
|
||
pt->read_buf = pt->saved_read_buf;
|
||
if (pt->read_buf != &pt->shortbuf)
|
||
xfree (pt->read_buf);
|
||
if (pt->write_buf != &pt->shortbuf)
|
||
xfree (pt->write_buf);
|
||
scm_gc_free (iomem, sizeof (*iomem), "memory port");
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* "free" method for memory ports. */
|
||
|
||
static size_t
|
||
gdbscm_memory_port_free (SCM port)
|
||
{
|
||
gdbscm_memory_port_close (port);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* "print" method for memory ports. */
|
||
|
||
static int
|
||
gdbscm_memory_port_print (SCM exp, SCM port, scm_print_state *pstate)
|
||
{
|
||
ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (exp);
|
||
char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp));
|
||
|
||
scm_puts ("#<", port);
|
||
scm_print_port_mode (exp, port);
|
||
/* scm_print_port_mode includes a trailing space. */
|
||
gdbscm_printf (port, "%s %s-%s", type,
|
||
hex_string (iomem->start), hex_string (iomem->end));
|
||
scm_putc ('>', port);
|
||
return 1;
|
||
}
|
||
|
||
/* Create the port type used for memory. */
|
||
|
||
static void
|
||
ioscm_init_memory_port_type (void)
|
||
{
|
||
memory_port_desc = scm_make_port_type (memory_port_desc_name,
|
||
gdbscm_memory_port_fill_input,
|
||
gdbscm_memory_port_write);
|
||
|
||
scm_set_port_end_input (memory_port_desc, gdbscm_memory_port_end_input);
|
||
scm_set_port_flush (memory_port_desc, gdbscm_memory_port_flush);
|
||
scm_set_port_seek (memory_port_desc, gdbscm_memory_port_seek);
|
||
scm_set_port_close (memory_port_desc, gdbscm_memory_port_close);
|
||
scm_set_port_free (memory_port_desc, gdbscm_memory_port_free);
|
||
scm_set_port_print (memory_port_desc, gdbscm_memory_port_print);
|
||
}
|
||
|
||
/* Helper for gdbscm_open_memory to parse the mode bits.
|
||
An exception is thrown if MODE is invalid. */
|
||
|
||
static long
|
||
ioscm_parse_mode_bits (const char *func_name, const char *mode)
|
||
{
|
||
const char *p;
|
||
long mode_bits;
|
||
|
||
if (*mode != 'r' && *mode != 'w')
|
||
{
|
||
gdbscm_out_of_range_error (func_name, 0,
|
||
gdbscm_scm_from_c_string (mode),
|
||
_("bad mode string"));
|
||
}
|
||
for (p = mode + 1; *p != '\0'; ++p)
|
||
{
|
||
switch (*p)
|
||
{
|
||
case '0':
|
||
case 'b':
|
||
case '+':
|
||
break;
|
||
default:
|
||
gdbscm_out_of_range_error (func_name, 0,
|
||
gdbscm_scm_from_c_string (mode),
|
||
_("bad mode string"));
|
||
}
|
||
}
|
||
|
||
/* Kinda awkward to convert the mode from SCM -> string only to have Guile
|
||
convert it back to SCM, but that's the API we have to work with. */
|
||
mode_bits = scm_mode_bits ((char *) mode);
|
||
|
||
return mode_bits;
|
||
}
|
||
|
||
/* Helper for gdbscm_open_memory to finish initializing the port.
|
||
The port has address range [start,end).
|
||
This means that address of 0xff..ff is not accessible.
|
||
I can live with that. */
|
||
|
||
static void
|
||
ioscm_init_memory_port (SCM port, CORE_ADDR start, CORE_ADDR end)
|
||
{
|
||
scm_t_port *pt;
|
||
ioscm_memory_port *iomem;
|
||
int buffered = (SCM_CELL_WORD_0 (port) & SCM_BUF0) == 0;
|
||
|
||
gdb_assert (start <= end);
|
||
|
||
iomem = (ioscm_memory_port *) scm_gc_malloc_pointerless (sizeof (*iomem),
|
||
"memory port");
|
||
|
||
iomem->start = start;
|
||
iomem->end = end;
|
||
iomem->size = end - start;
|
||
iomem->current = 0;
|
||
if (buffered)
|
||
{
|
||
iomem->read_buf_size = default_read_buf_size;
|
||
iomem->write_buf_size = default_write_buf_size;
|
||
}
|
||
else
|
||
{
|
||
iomem->read_buf_size = 1;
|
||
iomem->write_buf_size = 1;
|
||
}
|
||
|
||
pt = SCM_PTAB_ENTRY (port);
|
||
/* Match the expectation of `binary-port?'. */
|
||
pt->encoding = NULL;
|
||
pt->rw_random = 1;
|
||
pt->read_buf_size = iomem->read_buf_size;
|
||
pt->write_buf_size = iomem->write_buf_size;
|
||
if (buffered)
|
||
{
|
||
pt->read_buf = (unsigned char *) xmalloc (pt->read_buf_size);
|
||
pt->write_buf = (unsigned char *) xmalloc (pt->write_buf_size);
|
||
}
|
||
else
|
||
{
|
||
pt->read_buf = &pt->shortbuf;
|
||
pt->write_buf = &pt->shortbuf;
|
||
}
|
||
pt->read_pos = pt->read_end = pt->read_buf;
|
||
pt->write_pos = pt->write_buf;
|
||
pt->write_end = pt->write_buf + pt->write_buf_size;
|
||
|
||
SCM_SETSTREAM (port, iomem);
|
||
}
|
||
|
||
/* Re-initialize a memory port, updating its read/write buffer sizes.
|
||
An exception is thrown if the port is unbuffered.
|
||
TODO: Allow switching buffered/unbuffered.
|
||
An exception is also thrown if data is still buffered, except in the case
|
||
where the buffer size isn't changing (since that's just a nop). */
|
||
|
||
static void
|
||
ioscm_reinit_memory_port (SCM port, size_t read_buf_size,
|
||
size_t write_buf_size, const char *func_name)
|
||
{
|
||
scm_t_port *pt = SCM_PTAB_ENTRY (port);
|
||
ioscm_memory_port *iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
|
||
gdb_assert (read_buf_size >= min_memory_port_buf_size
|
||
&& read_buf_size <= max_memory_port_buf_size);
|
||
gdb_assert (write_buf_size >= min_memory_port_buf_size
|
||
&& write_buf_size <= max_memory_port_buf_size);
|
||
|
||
/* First check if the port is unbuffered. */
|
||
|
||
if (pt->read_buf == &pt->shortbuf)
|
||
{
|
||
gdb_assert (pt->write_buf == &pt->shortbuf);
|
||
scm_misc_error (func_name, _("port is unbuffered: ~a"),
|
||
scm_list_1 (port));
|
||
}
|
||
|
||
/* Next check if anything is buffered. */
|
||
|
||
if (read_buf_size != pt->read_buf_size
|
||
&& pt->read_end != pt->read_buf)
|
||
{
|
||
scm_misc_error (func_name, _("read buffer not empty: ~a"),
|
||
scm_list_1 (port));
|
||
}
|
||
|
||
if (write_buf_size != pt->write_buf_size
|
||
&& pt->write_pos != pt->write_buf)
|
||
{
|
||
scm_misc_error (func_name, _("write buffer not empty: ~a"),
|
||
scm_list_1 (port));
|
||
}
|
||
|
||
/* Now we can update the buffer sizes, but only if the size has changed. */
|
||
|
||
if (read_buf_size != pt->read_buf_size)
|
||
{
|
||
iomem->read_buf_size = read_buf_size;
|
||
pt->read_buf_size = read_buf_size;
|
||
xfree (pt->read_buf);
|
||
pt->read_buf = (unsigned char *) xmalloc (pt->read_buf_size);
|
||
pt->read_pos = pt->read_end = pt->read_buf;
|
||
}
|
||
|
||
if (write_buf_size != pt->write_buf_size)
|
||
{
|
||
iomem->write_buf_size = write_buf_size;
|
||
pt->write_buf_size = write_buf_size;
|
||
xfree (pt->write_buf);
|
||
pt->write_buf = (unsigned char *) xmalloc (pt->write_buf_size);
|
||
pt->write_pos = pt->write_buf;
|
||
pt->write_end = pt->write_buf + pt->write_buf_size;
|
||
}
|
||
}
|
||
|
||
/* (open-memory [#:mode string] [#:start address] [#:size integer]) -> port
|
||
Return a port that can be used for reading and writing memory.
|
||
MODE is a string, and must be one of "r", "w", or "r+".
|
||
"0" may be appended to MODE to mark the port as unbuffered.
|
||
For compatibility "b" (binary) may also be appended, but we ignore it:
|
||
memory ports are binary only.
|
||
|
||
The chunk of memory that can be accessed can be bounded.
|
||
If both START,SIZE are unspecified, all of memory can be accessed
|
||
(except 0xff..ff). If only START is specified, all of memory from that
|
||
point on can be accessed (except 0xff..ff). If only SIZE if specified,
|
||
all memory in [0,SIZE) can be accessed. If both are specified, all memory
|
||
in [START,START+SIZE) can be accessed.
|
||
|
||
Note: If it becomes useful enough we can later add #:end as an alternative
|
||
to #:size. For now it is left out.
|
||
|
||
The result is a Scheme port, and its semantics are a bit odd for accessing
|
||
memory (e.g., unget), but we don't try to hide this. It's a port.
|
||
|
||
N.B. Seeks on the port must be in the range [0,size].
|
||
This is for similarity with bytevector ports, and so that one can seek
|
||
to the first byte. */
|
||
|
||
static SCM
|
||
gdbscm_open_memory (SCM rest)
|
||
{
|
||
const SCM keywords[] = {
|
||
mode_keyword, start_keyword, size_keyword, SCM_BOOL_F
|
||
};
|
||
char *mode = NULL;
|
||
CORE_ADDR start = 0;
|
||
CORE_ADDR end;
|
||
int mode_arg_pos = -1, start_arg_pos = -1, size_arg_pos = -1;
|
||
ULONGEST size;
|
||
SCM port;
|
||
long mode_bits;
|
||
|
||
gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "#sUU", rest,
|
||
&mode_arg_pos, &mode,
|
||
&start_arg_pos, &start,
|
||
&size_arg_pos, &size);
|
||
|
||
scm_dynwind_begin ((scm_t_dynwind_flags) 0);
|
||
|
||
if (mode == NULL)
|
||
mode = xstrdup ("r");
|
||
scm_dynwind_free (mode);
|
||
|
||
if (size_arg_pos > 0)
|
||
{
|
||
/* For now be strict about start+size overflowing. If it becomes
|
||
a nuisance we can relax things later. */
|
||
if (start + size < start)
|
||
{
|
||
gdbscm_out_of_range_error (FUNC_NAME, 0,
|
||
scm_list_2 (gdbscm_scm_from_ulongest (start),
|
||
gdbscm_scm_from_ulongest (size)),
|
||
_("start+size overflows"));
|
||
}
|
||
end = start + size;
|
||
}
|
||
else
|
||
end = ~(CORE_ADDR) 0;
|
||
|
||
mode_bits = ioscm_parse_mode_bits (FUNC_NAME, mode);
|
||
|
||
port = ioscm_open_port (memory_port_desc, mode_bits);
|
||
|
||
ioscm_init_memory_port (port, start, end);
|
||
|
||
scm_dynwind_end ();
|
||
|
||
/* TODO: Set the file name as "memory-start-end"? */
|
||
return port;
|
||
}
|
||
|
||
/* Return non-zero if OBJ is a memory port. */
|
||
|
||
static int
|
||
gdbscm_is_memory_port (SCM obj)
|
||
{
|
||
return !SCM_IMP (obj) && (SCM_TYP16 (obj) == memory_port_desc);
|
||
}
|
||
|
||
/* (memory-port? obj) -> boolean */
|
||
|
||
static SCM
|
||
gdbscm_memory_port_p (SCM obj)
|
||
{
|
||
return scm_from_bool (gdbscm_is_memory_port (obj));
|
||
}
|
||
|
||
/* (memory-port-range port) -> (start end) */
|
||
|
||
static SCM
|
||
gdbscm_memory_port_range (SCM port)
|
||
{
|
||
ioscm_memory_port *iomem;
|
||
|
||
SCM_ASSERT_TYPE (gdbscm_is_memory_port (port), port, SCM_ARG1, FUNC_NAME,
|
||
memory_port_desc_name);
|
||
|
||
iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
return scm_list_2 (gdbscm_scm_from_ulongest (iomem->start),
|
||
gdbscm_scm_from_ulongest (iomem->end));
|
||
}
|
||
|
||
/* (memory-port-read-buffer-size port) -> integer */
|
||
|
||
static SCM
|
||
gdbscm_memory_port_read_buffer_size (SCM port)
|
||
{
|
||
ioscm_memory_port *iomem;
|
||
|
||
SCM_ASSERT_TYPE (gdbscm_is_memory_port (port), port, SCM_ARG1, FUNC_NAME,
|
||
memory_port_desc_name);
|
||
|
||
iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
return scm_from_uint (iomem->read_buf_size);
|
||
}
|
||
|
||
/* (set-memory-port-read-buffer-size! port size) -> unspecified
|
||
An exception is thrown if read data is still buffered or if the port
|
||
is unbuffered. */
|
||
|
||
static SCM
|
||
gdbscm_set_memory_port_read_buffer_size_x (SCM port, SCM size)
|
||
{
|
||
ioscm_memory_port *iomem;
|
||
|
||
SCM_ASSERT_TYPE (gdbscm_is_memory_port (port), port, SCM_ARG1, FUNC_NAME,
|
||
memory_port_desc_name);
|
||
SCM_ASSERT_TYPE (scm_is_integer (size), size, SCM_ARG2, FUNC_NAME,
|
||
_("integer"));
|
||
|
||
if (!scm_is_unsigned_integer (size, min_memory_port_buf_size,
|
||
max_memory_port_buf_size))
|
||
{
|
||
gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, size,
|
||
out_of_range_buf_size);
|
||
}
|
||
|
||
iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
ioscm_reinit_memory_port (port, scm_to_uint (size), iomem->write_buf_size,
|
||
FUNC_NAME);
|
||
|
||
return SCM_UNSPECIFIED;
|
||
}
|
||
|
||
/* (memory-port-write-buffer-size port) -> integer */
|
||
|
||
static SCM
|
||
gdbscm_memory_port_write_buffer_size (SCM port)
|
||
{
|
||
ioscm_memory_port *iomem;
|
||
|
||
SCM_ASSERT_TYPE (gdbscm_is_memory_port (port), port, SCM_ARG1, FUNC_NAME,
|
||
memory_port_desc_name);
|
||
|
||
iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
return scm_from_uint (iomem->write_buf_size);
|
||
}
|
||
|
||
/* (set-memory-port-write-buffer-size! port size) -> unspecified
|
||
An exception is thrown if write data is still buffered or if the port
|
||
is unbuffered. */
|
||
|
||
static SCM
|
||
gdbscm_set_memory_port_write_buffer_size_x (SCM port, SCM size)
|
||
{
|
||
ioscm_memory_port *iomem;
|
||
|
||
SCM_ASSERT_TYPE (gdbscm_is_memory_port (port), port, SCM_ARG1, FUNC_NAME,
|
||
memory_port_desc_name);
|
||
SCM_ASSERT_TYPE (scm_is_integer (size), size, SCM_ARG2, FUNC_NAME,
|
||
_("integer"));
|
||
|
||
if (!scm_is_unsigned_integer (size, min_memory_port_buf_size,
|
||
max_memory_port_buf_size))
|
||
{
|
||
gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, size,
|
||
out_of_range_buf_size);
|
||
}
|
||
|
||
iomem = (ioscm_memory_port *) SCM_STREAM (port);
|
||
ioscm_reinit_memory_port (port, iomem->read_buf_size, scm_to_uint (size),
|
||
FUNC_NAME);
|
||
|
||
return SCM_UNSPECIFIED;
|
||
}
|
||
|
||
/* Initialize gdb ports. */
|
||
|
||
static const scheme_function port_functions[] =
|
||
{
|
||
{ "input-port", 0, 0, 0, as_a_scm_t_subr (gdbscm_input_port),
|
||
"\
|
||
Return gdb's input port." },
|
||
|
||
{ "output-port", 0, 0, 0, as_a_scm_t_subr (gdbscm_output_port),
|
||
"\
|
||
Return gdb's output port." },
|
||
|
||
{ "error-port", 0, 0, 0, as_a_scm_t_subr (gdbscm_error_port),
|
||
"\
|
||
Return gdb's error port." },
|
||
|
||
{ "stdio-port?", 1, 0, 0, as_a_scm_t_subr (gdbscm_stdio_port_p),
|
||
"\
|
||
Return #t if the object is a gdb:stdio-port." },
|
||
|
||
{ "open-memory", 0, 0, 1, as_a_scm_t_subr (gdbscm_open_memory),
|
||
"\
|
||
Return a port that can be used for reading/writing inferior memory.\n\
|
||
\n\
|
||
Arguments: [#:mode string] [#:start address] [#:size integer]\n\
|
||
Returns: A port object." },
|
||
|
||
{ "memory-port?", 1, 0, 0, as_a_scm_t_subr (gdbscm_memory_port_p),
|
||
"\
|
||
Return #t if the object is a memory port." },
|
||
|
||
{ "memory-port-range", 1, 0, 0, as_a_scm_t_subr (gdbscm_memory_port_range),
|
||
"\
|
||
Return the memory range of the port as (start end)." },
|
||
|
||
{ "memory-port-read-buffer-size", 1, 0, 0,
|
||
as_a_scm_t_subr (gdbscm_memory_port_read_buffer_size),
|
||
"\
|
||
Return the size of the read buffer for the memory port." },
|
||
|
||
{ "set-memory-port-read-buffer-size!", 2, 0, 0,
|
||
as_a_scm_t_subr (gdbscm_set_memory_port_read_buffer_size_x),
|
||
"\
|
||
Set the size of the read buffer for the memory port.\n\
|
||
\n\
|
||
Arguments: port integer\n\
|
||
Returns: unspecified." },
|
||
|
||
{ "memory-port-write-buffer-size", 1, 0, 0,
|
||
as_a_scm_t_subr (gdbscm_memory_port_write_buffer_size),
|
||
"\
|
||
Return the size of the write buffer for the memory port." },
|
||
|
||
{ "set-memory-port-write-buffer-size!", 2, 0, 0,
|
||
as_a_scm_t_subr (gdbscm_set_memory_port_write_buffer_size_x),
|
||
"\
|
||
Set the size of the write buffer for the memory port.\n\
|
||
\n\
|
||
Arguments: port integer\n\
|
||
Returns: unspecified." },
|
||
|
||
END_FUNCTIONS
|
||
};
|
||
|
||
static const scheme_function private_port_functions[] =
|
||
{
|
||
#if 0 /* TODO */
|
||
{ "%with-gdb-input-from-port", 2, 0, 0,
|
||
as_a_scm_t_subr (gdbscm_percent_with_gdb_input_from_port),
|
||
"\
|
||
Temporarily set GDB's input port to PORT and then invoke THUNK.\n\
|
||
\n\
|
||
Arguments: port thunk\n\
|
||
Returns: The result of calling THUNK.\n\
|
||
\n\
|
||
This procedure is experimental." },
|
||
#endif
|
||
|
||
{ "%with-gdb-output-to-port", 2, 0, 0,
|
||
as_a_scm_t_subr (gdbscm_percent_with_gdb_output_to_port),
|
||
"\
|
||
Temporarily set GDB's output port to PORT and then invoke THUNK.\n\
|
||
\n\
|
||
Arguments: port thunk\n\
|
||
Returns: The result of calling THUNK.\n\
|
||
\n\
|
||
This procedure is experimental." },
|
||
|
||
{ "%with-gdb-error-to-port", 2, 0, 0,
|
||
as_a_scm_t_subr (gdbscm_percent_with_gdb_error_to_port),
|
||
"\
|
||
Temporarily set GDB's error port to PORT and then invoke THUNK.\n\
|
||
\n\
|
||
Arguments: port thunk\n\
|
||
Returns: The result of calling THUNK.\n\
|
||
\n\
|
||
This procedure is experimental." },
|
||
|
||
END_FUNCTIONS
|
||
};
|
||
|
||
void
|
||
gdbscm_initialize_ports (void)
|
||
{
|
||
/* Save the original stdio ports for debugging purposes. */
|
||
|
||
orig_input_port_scm = scm_current_input_port ();
|
||
orig_output_port_scm = scm_current_output_port ();
|
||
orig_error_port_scm = scm_current_error_port ();
|
||
|
||
/* Set up the stdio ports. */
|
||
|
||
ioscm_init_gdb_stdio_port ();
|
||
input_port_scm = ioscm_make_gdb_stdio_port (0);
|
||
output_port_scm = ioscm_make_gdb_stdio_port (1);
|
||
error_port_scm = ioscm_make_gdb_stdio_port (2);
|
||
|
||
/* Set up memory ports. */
|
||
|
||
ioscm_init_memory_port_type ();
|
||
|
||
/* Install the accessor functions. */
|
||
|
||
gdbscm_define_functions (port_functions, 1);
|
||
gdbscm_define_functions (private_port_functions, 0);
|
||
|
||
/* Keyword args for open-memory. */
|
||
|
||
mode_keyword = scm_from_latin1_keyword ("mode");
|
||
start_keyword = scm_from_latin1_keyword ("start");
|
||
size_keyword = scm_from_latin1_keyword ("size");
|
||
|
||
/* Error message text for "out of range" memory port buffer sizes. */
|
||
|
||
out_of_range_buf_size = xstrprintf ("size not between %u - %u",
|
||
min_memory_port_buf_size,
|
||
max_memory_port_buf_size);
|
||
}
|