524 lines
10 KiB
C
524 lines
10 KiB
C
/* Remote utility routines for the remote server for GDB.
|
|
Copyright (C) 1986, 1989, 1993 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#include "server.h"
|
|
#include "terminal.h"
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/file.h>
|
|
#include <netinet/in.h>
|
|
#include <sys/socket.h>
|
|
#include <netdb.h>
|
|
#include <netinet/tcp.h>
|
|
#include <sys/ioctl.h>
|
|
#include <signal.h>
|
|
#include <fcntl.h>
|
|
|
|
static int remote_desc;
|
|
|
|
/* Open a connection to a remote debugger.
|
|
NAME is the filename used for communication. */
|
|
|
|
void
|
|
remote_open (name)
|
|
char *name;
|
|
{
|
|
if (!strchr (name, ':'))
|
|
{
|
|
remote_desc = open (name, O_RDWR);
|
|
if (remote_desc < 0)
|
|
perror_with_name ("Could not open remote device");
|
|
|
|
#ifdef HAVE_TERMIOS
|
|
{
|
|
struct termios termios;
|
|
tcgetattr(remote_desc, &termios);
|
|
|
|
termios.c_iflag = 0;
|
|
termios.c_oflag = 0;
|
|
termios.c_lflag = 0;
|
|
termios.c_cflag &= ~(CSIZE|PARENB);
|
|
termios.c_cflag |= CLOCAL | CS8;
|
|
termios.c_cc[VMIN] = 0;
|
|
termios.c_cc[VTIME] = 0;
|
|
|
|
tcsetattr(remote_desc, TCSANOW, &termios);
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_TERMIO
|
|
{
|
|
struct termio termio;
|
|
ioctl (remote_desc, TCGETA, &termio);
|
|
|
|
termio.c_iflag = 0;
|
|
termio.c_oflag = 0;
|
|
termio.c_lflag = 0;
|
|
termio.c_cflag &= ~(CSIZE|PARENB);
|
|
termio.c_cflag |= CLOCAL | CS8;
|
|
termio.c_cc[VMIN] = 0;
|
|
termio.c_cc[VTIME] = 0;
|
|
|
|
ioctl (remote_desc, TCSETA, &termio);
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_SGTTY
|
|
{
|
|
struct sgttyb sg;
|
|
|
|
ioctl (remote_desc, TIOCGETP, &sg);
|
|
sg.sg_flags = RAW;
|
|
ioctl (remote_desc, TIOCSETP, &sg);
|
|
}
|
|
#endif
|
|
|
|
|
|
}
|
|
else
|
|
{
|
|
char *port_str;
|
|
int port;
|
|
struct sockaddr_in sockaddr;
|
|
int tmp;
|
|
struct protoent *protoent;
|
|
int tmp_desc;
|
|
|
|
port_str = strchr (name, ':');
|
|
|
|
port = atoi (port_str + 1);
|
|
|
|
tmp_desc = socket (PF_INET, SOCK_STREAM, 0);
|
|
if (tmp_desc < 0)
|
|
perror_with_name ("Can't open socket");
|
|
|
|
/* Allow rapid reuse of this port. */
|
|
tmp = 1;
|
|
setsockopt (tmp_desc, SOL_SOCKET, SO_REUSEADDR, (char *)&tmp,
|
|
sizeof(tmp));
|
|
|
|
sockaddr.sin_family = PF_INET;
|
|
sockaddr.sin_port = htons(port);
|
|
sockaddr.sin_addr.s_addr = INADDR_ANY;
|
|
|
|
if (bind (tmp_desc, (struct sockaddr *)&sockaddr, sizeof (sockaddr))
|
|
|| listen (tmp_desc, 1))
|
|
perror_with_name ("Can't bind address");
|
|
|
|
tmp = sizeof (sockaddr);
|
|
remote_desc = accept (tmp_desc, (struct sockaddr *)&sockaddr, &tmp);
|
|
if (remote_desc == -1)
|
|
perror_with_name ("Accept failed");
|
|
|
|
protoent = getprotobyname ("tcp");
|
|
if (!protoent)
|
|
perror_with_name ("getprotobyname");
|
|
|
|
/* Enable TCP keep alive process. */
|
|
tmp = 1;
|
|
setsockopt (tmp_desc, SOL_SOCKET, SO_KEEPALIVE, (char *)&tmp, sizeof(tmp));
|
|
|
|
/* Tell TCP not to delay small packets. This greatly speeds up
|
|
interactive response. */
|
|
tmp = 1;
|
|
setsockopt (remote_desc, protoent->p_proto, TCP_NODELAY,
|
|
(char *)&tmp, sizeof(tmp));
|
|
|
|
close (tmp_desc); /* No longer need this */
|
|
|
|
signal (SIGPIPE, SIG_IGN); /* If we don't do this, then gdbserver simply
|
|
exits when the remote side dies. */
|
|
}
|
|
|
|
fcntl (remote_desc, F_SETFL, FASYNC);
|
|
|
|
fprintf (stderr, "Remote debugging using %s\n", name);
|
|
}
|
|
|
|
void
|
|
remote_close()
|
|
{
|
|
close (remote_desc);
|
|
}
|
|
|
|
/* Convert hex digit A to a number. */
|
|
|
|
static int
|
|
fromhex (a)
|
|
int a;
|
|
{
|
|
if (a >= '0' && a <= '9')
|
|
return a - '0';
|
|
else if (a >= 'a' && a <= 'f')
|
|
return a - 'a' + 10;
|
|
else
|
|
error ("Reply contains invalid hex digit");
|
|
}
|
|
|
|
/* Convert number NIB to a hex digit. */
|
|
|
|
static int
|
|
tohex (nib)
|
|
int nib;
|
|
{
|
|
if (nib < 10)
|
|
return '0' + nib;
|
|
else
|
|
return 'a' + nib - 10;
|
|
}
|
|
|
|
/* Send a packet to the remote machine, with error checking.
|
|
The data of the packet is in BUF. Returns >= 0 on success, -1 otherwise. */
|
|
|
|
int
|
|
putpkt (buf)
|
|
char *buf;
|
|
{
|
|
int i;
|
|
unsigned char csum = 0;
|
|
char buf2[2000];
|
|
char buf3[1];
|
|
int cnt = strlen (buf);
|
|
char *p;
|
|
|
|
/* Copy the packet into buffer BUF2, encapsulating it
|
|
and giving it a checksum. */
|
|
|
|
p = buf2;
|
|
*p++ = '$';
|
|
|
|
for (i = 0; i < cnt; i++)
|
|
{
|
|
csum += buf[i];
|
|
*p++ = buf[i];
|
|
}
|
|
*p++ = '#';
|
|
*p++ = tohex ((csum >> 4) & 0xf);
|
|
*p++ = tohex (csum & 0xf);
|
|
|
|
/* Send it over and over until we get a positive ack. */
|
|
|
|
do
|
|
{
|
|
int cc;
|
|
|
|
if (write (remote_desc, buf2, p - buf2) != p - buf2)
|
|
{
|
|
perror ("putpkt(write)");
|
|
return -1;
|
|
}
|
|
|
|
cc = read (remote_desc, buf3, 1);
|
|
if (cc <= 0)
|
|
{
|
|
if (cc == 0)
|
|
fprintf (stderr, "putpkt(read): Got EOF\n");
|
|
else
|
|
perror ("putpkt(read)");
|
|
|
|
return -1;
|
|
}
|
|
}
|
|
while (buf3[0] != '+');
|
|
|
|
return 1; /* Success! */
|
|
}
|
|
|
|
/* Come here when we get an input interrupt from the remote side. This
|
|
interrupt should only be active while we are waiting for the child to do
|
|
something. About the only thing that should come through is a ^C, which
|
|
will cause us to send a SIGINT to the child. */
|
|
|
|
static void
|
|
input_interrupt()
|
|
{
|
|
int cc;
|
|
char c;
|
|
|
|
cc = read (remote_desc, &c, 1);
|
|
|
|
if (cc != 1 || c != '\003')
|
|
{
|
|
fprintf(stderr, "input_interrupt, cc = %d c = %d\n", cc, c);
|
|
return;
|
|
}
|
|
|
|
kill (inferior_pid, SIGINT);
|
|
}
|
|
|
|
void
|
|
enable_async_io()
|
|
{
|
|
signal (SIGIO, input_interrupt);
|
|
}
|
|
|
|
void
|
|
disable_async_io()
|
|
{
|
|
signal (SIGIO, SIG_IGN);
|
|
}
|
|
|
|
/* Returns next char from remote GDB. -1 if error. */
|
|
|
|
static int
|
|
readchar ()
|
|
{
|
|
static char buf[BUFSIZ];
|
|
static int bufcnt = 0;
|
|
static char *bufp;
|
|
|
|
if (bufcnt-- > 0)
|
|
return *bufp++ & 0x7f;
|
|
|
|
bufcnt = read (remote_desc, buf, sizeof (buf));
|
|
|
|
if (bufcnt <= 0)
|
|
{
|
|
if (bufcnt == 0)
|
|
fprintf (stderr, "readchar: Got EOF\n");
|
|
else
|
|
perror ("readchar");
|
|
|
|
return -1;
|
|
}
|
|
|
|
bufp = buf;
|
|
bufcnt--;
|
|
return *bufp++ & 0x7f;
|
|
}
|
|
|
|
/* Read a packet from the remote machine, with error checking,
|
|
and store it in BUF. Returns length of packet, or negative if error. */
|
|
|
|
int
|
|
getpkt (buf)
|
|
char *buf;
|
|
{
|
|
char *bp;
|
|
unsigned char csum, c1, c2;
|
|
int c;
|
|
|
|
while (1)
|
|
{
|
|
csum = 0;
|
|
|
|
while (1)
|
|
{
|
|
c = readchar ();
|
|
if (c == '$')
|
|
break;
|
|
if (c < 0)
|
|
return -1;
|
|
}
|
|
|
|
bp = buf;
|
|
while (1)
|
|
{
|
|
c = readchar ();
|
|
if (c < 0)
|
|
return -1;
|
|
if (c == '#')
|
|
break;
|
|
*bp++ = c;
|
|
csum += c;
|
|
}
|
|
*bp = 0;
|
|
|
|
c1 = fromhex (readchar ());
|
|
c2 = fromhex (readchar ());
|
|
if (csum == (c1 << 4) + c2)
|
|
break;
|
|
|
|
fprintf (stderr, "Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s\n",
|
|
(c1 << 4) + c2, csum, buf);
|
|
write (remote_desc, "-", 1);
|
|
}
|
|
|
|
write (remote_desc, "+", 1);
|
|
return bp - buf;
|
|
}
|
|
|
|
void
|
|
write_ok (buf)
|
|
char *buf;
|
|
{
|
|
buf[0] = 'O';
|
|
buf[1] = 'K';
|
|
buf[2] = '\0';
|
|
}
|
|
|
|
void
|
|
write_enn (buf)
|
|
char *buf;
|
|
{
|
|
buf[0] = 'E';
|
|
buf[1] = 'N';
|
|
buf[2] = 'N';
|
|
buf[3] = '\0';
|
|
}
|
|
|
|
void
|
|
convert_int_to_ascii (from, to, n)
|
|
char *from, *to;
|
|
int n;
|
|
{
|
|
int nib;
|
|
char ch;
|
|
while (n--)
|
|
{
|
|
ch = *from++;
|
|
nib = ((ch & 0xf0) >> 4) & 0x0f;
|
|
*to++ = tohex (nib);
|
|
nib = ch & 0x0f;
|
|
*to++ = tohex (nib);
|
|
}
|
|
*to++ = 0;
|
|
}
|
|
|
|
|
|
void
|
|
convert_ascii_to_int (from, to, n)
|
|
char *from, *to;
|
|
int n;
|
|
{
|
|
int nib1, nib2;
|
|
while (n--)
|
|
{
|
|
nib1 = fromhex (*from++);
|
|
nib2 = fromhex (*from++);
|
|
*to++ = (((nib1 & 0x0f) << 4) & 0xf0) | (nib2 & 0x0f);
|
|
}
|
|
}
|
|
|
|
static char *
|
|
outreg(regno, buf)
|
|
int regno;
|
|
char *buf;
|
|
{
|
|
extern char registers[];
|
|
int regsize = REGISTER_RAW_SIZE (regno);
|
|
|
|
*buf++ = tohex (regno >> 4);
|
|
*buf++ = tohex (regno & 0xf);
|
|
*buf++ = ':';
|
|
convert_int_to_ascii (®isters[REGISTER_BYTE (regno)], buf, regsize);
|
|
buf += 2 * regsize;
|
|
*buf++ = ';';
|
|
|
|
return buf;
|
|
}
|
|
|
|
void
|
|
prepare_resume_reply (buf, status, signo)
|
|
char *buf;
|
|
char status;
|
|
unsigned char signo;
|
|
{
|
|
int nib;
|
|
|
|
*buf++ = status;
|
|
|
|
/* FIXME! Should be converting this signal number (numbered
|
|
according to the signal numbering of the system we are running on)
|
|
to the signal numbers used by the gdb protocol (see enum target_signal
|
|
in gdb/target.h). */
|
|
nib = ((signo & 0xf0) >> 4);
|
|
*buf++ = tohex (nib);
|
|
nib = signo & 0x0f;
|
|
*buf++ = tohex (nib);
|
|
|
|
if (status == 'T')
|
|
{
|
|
buf = outreg (PC_REGNUM, buf);
|
|
buf = outreg (FP_REGNUM, buf);
|
|
buf = outreg (SP_REGNUM, buf);
|
|
#ifdef NPC_REGNUM
|
|
buf = outreg (NPC_REGNUM, buf);
|
|
#endif
|
|
#ifdef O7_REGNUM
|
|
buf = outreg (O7_REGNUM, buf);
|
|
#endif
|
|
|
|
/* If the debugger hasn't used any thread features, don't burden it with
|
|
threads. If we didn't check this, GDB 4.13 and older would choke. */
|
|
if (cont_thread != 0)
|
|
{
|
|
if (old_thread_from_wait != thread_from_wait)
|
|
{
|
|
sprintf (buf, "thread:%x;", thread_from_wait);
|
|
buf += strlen (buf);
|
|
old_thread_from_wait = thread_from_wait;
|
|
}
|
|
}
|
|
}
|
|
/* For W and X, we're done. */
|
|
*buf++ = 0;
|
|
}
|
|
|
|
void
|
|
decode_m_packet (from, mem_addr_ptr, len_ptr)
|
|
char *from;
|
|
CORE_ADDR *mem_addr_ptr;
|
|
unsigned int *len_ptr;
|
|
{
|
|
int i = 0, j = 0;
|
|
char ch;
|
|
*mem_addr_ptr = *len_ptr = 0;
|
|
|
|
while ((ch = from[i++]) != ',')
|
|
{
|
|
*mem_addr_ptr = *mem_addr_ptr << 4;
|
|
*mem_addr_ptr |= fromhex (ch) & 0x0f;
|
|
}
|
|
|
|
for (j = 0; j < 4; j++)
|
|
{
|
|
if ((ch = from[i++]) == 0)
|
|
break;
|
|
*len_ptr = *len_ptr << 4;
|
|
*len_ptr |= fromhex (ch) & 0x0f;
|
|
}
|
|
}
|
|
|
|
void
|
|
decode_M_packet (from, mem_addr_ptr, len_ptr, to)
|
|
char *from, *to;
|
|
CORE_ADDR *mem_addr_ptr;
|
|
unsigned int *len_ptr;
|
|
{
|
|
int i = 0;
|
|
char ch;
|
|
*mem_addr_ptr = *len_ptr = 0;
|
|
|
|
while ((ch = from[i++]) != ',')
|
|
{
|
|
*mem_addr_ptr = *mem_addr_ptr << 4;
|
|
*mem_addr_ptr |= fromhex (ch) & 0x0f;
|
|
}
|
|
|
|
while ((ch = from[i++]) != ':')
|
|
{
|
|
*len_ptr = *len_ptr << 4;
|
|
*len_ptr |= fromhex (ch) & 0x0f;
|
|
}
|
|
|
|
convert_ascii_to_int (&from[i++], to, *len_ptr);
|
|
}
|