mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-15 08:08:55 +00:00
be5e6fff5a
* ser-go32.c: (dos_async_ready): See if anything is in the buffer. (dos_async_rx): rewrite to unpack as many characters from the asynctsr as possible into a local buffer.
479 lines
9.1 KiB
C
479 lines
9.1 KiB
C
/* Remote serial interface for local (hardwired) serial ports for GO32.
|
|
Copyright 1992, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
#include "defs.h"
|
|
#include "serial.h"
|
|
#include <sys/dos.h>
|
|
|
|
#define disable() asm("cli")
|
|
#define enable() asm("sti")
|
|
|
|
|
|
struct go32_ttystate
|
|
{
|
|
int bogus;
|
|
};
|
|
typedef struct
|
|
{
|
|
short jmp_op;
|
|
short signature;
|
|
short version;
|
|
short buffer_start;
|
|
short buffer_end;
|
|
short getp;
|
|
short putp;
|
|
short iov;
|
|
short count;
|
|
short overflow;
|
|
short buffer_size;
|
|
short ovflushes;
|
|
}
|
|
ASYNC_STRUCT;
|
|
|
|
#define AOFF_JMP_OP 0
|
|
#define AOFF_SIGNATURE 2
|
|
#define AOFF_VERSION 4
|
|
#define AOFF_BUFFER_START 6
|
|
#define AOFF_BUFFER_END 8
|
|
#define AOFF_GETP 10
|
|
#define AOFF_PUTP 12
|
|
#define AOFF_IOV 14
|
|
#define AOFF_COUNT 16
|
|
#define AOFF_OVERFLOW 18
|
|
#define AOFF_BUFFER_SIZE 20
|
|
#define AOFF_OVFLUSHES 22
|
|
|
|
|
|
static ASYNC_STRUCT a; /* Copy in our mem of the struct */
|
|
static long aindex; /* index into dos space of struct */
|
|
|
|
static int go32_open PARAMS ((serial_t scb, const char *name));
|
|
static void go32_raw PARAMS ((serial_t scb));
|
|
static int go32_readchar PARAMS ((serial_t scb, int timeout));
|
|
static int go32_setbaudrate PARAMS ((serial_t scb, int rate));
|
|
static int go32_write PARAMS ((serial_t scb, const char *str, int len));
|
|
static void go32_close PARAMS ((serial_t scb));
|
|
static serial_ttystate go32_get_tty_state PARAMS ((serial_t scb));
|
|
static int go32_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
|
|
static unsigned char aptr PARAMS ((short p));
|
|
static unsigned long getivec PARAMS ((int which));
|
|
static int dos_async_init PARAMS ((int port));
|
|
static void dos_async_tx PARAMS ((const char c));
|
|
static int dos_async_rx PARAMS (());
|
|
static int dosasync_read PARAMS ((int fd, char *buf, int len, int timeout));
|
|
static int dosasync_write PARAMS ((int fd, const char *buf, int len));
|
|
|
|
#define SIGNATURE 0x4154
|
|
#define VERSION 1
|
|
#define OFFSET 0x104
|
|
|
|
char packet[50];
|
|
int packet_len;
|
|
int packet_idx;
|
|
|
|
unsigned char bb;
|
|
unsigned short sb;
|
|
unsigned long sl;
|
|
|
|
#define SET_BYTE(x,y) { char _buf = y;dosmemput(&_buf,1, x);}
|
|
#define SET_WORD(x,y) { short _buf = y;dosmemput(&_buf,2, x);}
|
|
#define GET_BYTE(x) ( dosmemget((x),1,&bb), bb)
|
|
|
|
|
|
#define GET_LONG(x) ( dosmemget((x),4,&sl), sl)
|
|
|
|
static
|
|
unsigned short
|
|
GET_WORD (x)
|
|
{
|
|
unsigned short sb;
|
|
dosmemget ((x), 2, &sb);
|
|
return sb;
|
|
}
|
|
|
|
static int iov[2];
|
|
|
|
#define com_rb(n) iov[n]
|
|
#define com_tb(n) iov[n]
|
|
#define com_ier(n) iov[n]+1
|
|
#define com_ifr(n) iov[n]+2
|
|
#define com_bfr(n) iov[n]+3
|
|
#define com_mcr(n) iov[n]+4
|
|
#define com_lsr(n) iov[n]+5
|
|
#define com_msr(n) iov[n]+6
|
|
|
|
static unsigned char
|
|
aptr (p)
|
|
short p;
|
|
{
|
|
return GET_BYTE (aindex - OFFSET + p);
|
|
}
|
|
|
|
static unsigned long
|
|
getivec (int which)
|
|
{
|
|
long tryaindex;
|
|
|
|
if (GET_WORD (which * 4) != OFFSET)
|
|
return 0;
|
|
|
|
/* Find out where in memory this lives */
|
|
tryaindex = GET_WORD (which * 4 + 2) * 16 + GET_WORD (which * 4);
|
|
|
|
if (GET_WORD (tryaindex + 2) != SIGNATURE)
|
|
return 0;
|
|
if (GET_WORD (tryaindex + 4) != VERSION)
|
|
return 0;
|
|
return tryaindex;
|
|
}
|
|
|
|
static int
|
|
dos_async_init (port)
|
|
int port;
|
|
{
|
|
switch (port)
|
|
{
|
|
case 1:
|
|
aindex = getivec (12);
|
|
break;
|
|
case 2:
|
|
aindex = getivec (11);
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
if (!aindex)
|
|
{
|
|
error ("GDB cannot connect to asynctsr program, check that it is installed\n\
|
|
and that serial I/O is not being redirected (perhaps by NFS)\n\n\
|
|
example configuration:\n\
|
|
C> mode com%d:9600,n,8,1,p\n\
|
|
C> asynctsr %d\n\
|
|
C> gdb \n", port, port);
|
|
}
|
|
|
|
iov[0] = GET_WORD (aindex + AOFF_IOV);
|
|
outportb (com_ier (0), 0x0f);
|
|
outportb (com_bfr (0), 0x03);
|
|
outportb (com_mcr (0), 0x0b);
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
dos_async_tx (c)
|
|
const char c;
|
|
{
|
|
while (~inportb (com_lsr (0)) & 0x20)
|
|
;
|
|
outportb (com_tb (0), c);
|
|
}
|
|
|
|
static int
|
|
dos_async_ready ()
|
|
{
|
|
int ret;
|
|
|
|
if (packet_idx < packet_len)
|
|
return 1;
|
|
|
|
disable ();
|
|
#if RDY_CNT
|
|
ret = GET_WORD (aindex + AOFF_COUNT);
|
|
#else
|
|
ret = GET_WORD (aindex + AOFF_GETP) != GET_WORD (aindex + AOFF_PUTP);
|
|
#endif
|
|
enable ();
|
|
return ret;
|
|
|
|
|
|
}
|
|
|
|
static int
|
|
dos_async_rx ()
|
|
{
|
|
char rv;
|
|
short idx;
|
|
|
|
while (1)
|
|
{
|
|
if (packet_idx < packet_len)
|
|
{
|
|
char x = packet[packet_idx++];
|
|
return x;
|
|
}
|
|
while (!dos_async_ready ())
|
|
{
|
|
if (kbhit ())
|
|
{
|
|
printf_unfiltered ("abort!\n");
|
|
return 0;
|
|
}
|
|
}
|
|
disable ();
|
|
{
|
|
/* Sometimes we can read more than one char at a time
|
|
from the buffer, which is good, cause it'll mean
|
|
less time with interrupts turned off, which means
|
|
less dropped characters */
|
|
|
|
/* We only do the simplest case here - not bothering with
|
|
wrap around */
|
|
int len;
|
|
|
|
int getp = GET_WORD (aindex + AOFF_GETP);
|
|
int putp = GET_WORD (aindex + AOFF_PUTP);
|
|
int endb = GET_WORD (aindex + AOFF_BUFFER_END);
|
|
int startb = GET_WORD (aindex + AOFF_BUFFER_START);
|
|
|
|
/* We'd like to grab to the end of the the input,
|
|
but it may have wrapped, so max is to the end
|
|
of the buffer */
|
|
|
|
if (putp > endb || putp < getp)
|
|
putp = endb;
|
|
|
|
/* Work out the length of the suck */
|
|
len = putp - getp;
|
|
|
|
/* But only suck as many as we can hold in one go */
|
|
if (len > sizeof (packet))
|
|
len = sizeof (packet);
|
|
|
|
dosmemget (aindex - OFFSET + getp, len, packet);
|
|
|
|
packet_len = len;
|
|
packet_idx = 0;
|
|
|
|
if (getp + len >= endb)
|
|
{
|
|
getp = startb;
|
|
}
|
|
else
|
|
{
|
|
getp = getp + len;
|
|
}
|
|
|
|
SET_WORD (aindex + AOFF_GETP, getp);
|
|
SET_WORD (aindex + AOFF_COUNT, GET_WORD (aindex + AOFF_COUNT) - len);
|
|
}
|
|
enable ();
|
|
}
|
|
}
|
|
|
|
|
|
static int
|
|
dosasync_read (fd, buf, len, timeout)
|
|
int fd;
|
|
char *buf;
|
|
int len;
|
|
int timeout;
|
|
{
|
|
long now, then;
|
|
int i;
|
|
int its = 0;
|
|
time (&now);
|
|
then = now + timeout;
|
|
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
if (timeout)
|
|
{
|
|
while (!dos_async_ready ())
|
|
{
|
|
time (&now);
|
|
if (now >= then && timeout > 0 && its > 1000)
|
|
return i;
|
|
its++;
|
|
}
|
|
}
|
|
*buf++ = dos_async_rx ();
|
|
}
|
|
return len;
|
|
}
|
|
|
|
static int
|
|
dosasync_write (fd, buf, len)
|
|
int fd;
|
|
const char *buf;
|
|
int len;
|
|
{
|
|
int l;
|
|
|
|
for (l = 0; l < len; l++)
|
|
dos_async_tx (*buf++);
|
|
|
|
return len;
|
|
}
|
|
|
|
static int
|
|
go32_open (scb, name)
|
|
serial_t scb;
|
|
const char *name;
|
|
{
|
|
int port;
|
|
|
|
if (strncasecmp (name, "com", 3) != 0)
|
|
{
|
|
errno = ENOENT;
|
|
return -1;
|
|
}
|
|
|
|
port = name[3] - '0';
|
|
|
|
if ((port != 1) && (port != 2))
|
|
{
|
|
errno = ENOENT;
|
|
return -11;
|
|
}
|
|
|
|
scb->fd = dos_async_init (port);
|
|
if (!scb->fd)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
go32_noop (scb)
|
|
serial_t scb;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
go32_raw (scb)
|
|
serial_t scb;
|
|
{
|
|
/* Always in raw mode */
|
|
}
|
|
|
|
static int
|
|
go32_readchar (scb, timeout)
|
|
serial_t scb;
|
|
int timeout;
|
|
{
|
|
char buf;
|
|
|
|
/* Shortcut for polling */
|
|
if (timeout == 0)
|
|
{
|
|
if (dos_async_ready ())
|
|
{
|
|
return dos_async_rx ();
|
|
}
|
|
return SERIAL_TIMEOUT;
|
|
}
|
|
|
|
if (dosasync_read (scb->fd, &buf, 1, timeout))
|
|
return buf;
|
|
else
|
|
return SERIAL_TIMEOUT;
|
|
}
|
|
|
|
/* go32_{get set}_tty_state() are both dummys to fill out the function
|
|
vector. Someday, they may do something real... */
|
|
|
|
static serial_ttystate
|
|
go32_get_tty_state (scb)
|
|
serial_t scb;
|
|
{
|
|
struct go32_ttystate *state;
|
|
|
|
state = (struct go32_ttystate *) xmalloc (sizeof *state);
|
|
|
|
return (serial_ttystate) state;
|
|
}
|
|
|
|
static int
|
|
go32_set_tty_state (scb, ttystate)
|
|
serial_t scb;
|
|
serial_ttystate ttystate;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
go32_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
|
|
serial_t scb;
|
|
serial_ttystate new_ttystate;
|
|
serial_ttystate old_ttystate;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
go32_print_tty_state (scb, ttystate)
|
|
serial_t scb;
|
|
serial_ttystate ttystate;
|
|
{
|
|
/* Nothing to print. */
|
|
return;
|
|
}
|
|
|
|
static int
|
|
go32_setbaudrate (scb, rate)
|
|
serial_t scb;
|
|
int rate;
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
go32_write (scb, str, len)
|
|
serial_t scb;
|
|
const char *str;
|
|
int len;
|
|
{
|
|
dosasync_write (scb->fd, str, len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
go32_close (scb)
|
|
serial_t scb;
|
|
{
|
|
}
|
|
|
|
static struct serial_ops go32_ops =
|
|
{
|
|
"hardwire",
|
|
0,
|
|
go32_open,
|
|
go32_close,
|
|
go32_readchar,
|
|
go32_write,
|
|
go32_noop, /* flush output */
|
|
go32_noop, /* flush input */
|
|
go32_noop, /* send break -- currently used only for nindy */
|
|
go32_raw,
|
|
go32_get_tty_state,
|
|
go32_set_tty_state,
|
|
go32_print_tty_state,
|
|
go32_noflush_set_tty_state,
|
|
go32_setbaudrate,
|
|
};
|
|
|
|
void
|
|
_initialize_ser_go32 ()
|
|
{
|
|
serial_add_interface (&go32_ops);
|
|
}
|