binutils-gdb/gdb/sparcl-tdep.c

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/* Target dependent code for the Fujitsu SPARClite for GDB, the GNU debugger.
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Copyright 1994, 1995, 1996, 1998, 1999, 2000, 2001
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
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.
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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.
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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 "defs.h"
#include "gdbcore.h"
#include "breakpoint.h"
#include "target.h"
#include "serial.h"
#include "regcache.h"
#include <sys/types.h>
#if (!defined(__GO32__) && !defined(_WIN32)) || defined(__CYGWIN__)
#define HAVE_SOCKETS
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#endif
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static struct target_ops sparclite_ops;
static char *remote_target_name = NULL;
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static struct serial *remote_desc = NULL;
static int serial_flag;
#ifdef HAVE_SOCKETS
static int udp_fd = -1;
#endif
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static struct serial *open_tty (char *name);
static int send_resp (struct serial *desc, char c);
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static void close_tty (void * ignore);
#ifdef HAVE_SOCKETS
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static int recv_udp_buf (int fd, unsigned char *buf, int len, int timeout);
static int send_udp_buf (int fd, unsigned char *buf, int len);
#endif
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static void sparclite_open (char *name, int from_tty);
static void sparclite_close (int quitting);
static void download (char *target_name, char *args, int from_tty,
void (*write_routine) (bfd * from_bfd,
asection * from_sec,
file_ptr from_addr,
bfd_vma to_addr, int len),
void (*start_routine) (bfd_vma entry));
static void sparclite_serial_start (bfd_vma entry);
static void sparclite_serial_write (bfd * from_bfd, asection * from_sec,
file_ptr from_addr,
bfd_vma to_addr, int len);
#ifdef HAVE_SOCKETS
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static unsigned short calc_checksum (unsigned char *buffer, int count);
static void sparclite_udp_start (bfd_vma entry);
static void sparclite_udp_write (bfd * from_bfd, asection * from_sec,
file_ptr from_addr, bfd_vma to_addr,
int len);
#endif
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static void sparclite_download (char *filename, int from_tty);
#define DDA2_SUP_ASI 0xb000000
#define DDA1_SUP_ASI 0xb0000
#define DDA2_ASI_MASK 0xff000000
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#define DDA1_ASI_MASK 0xff0000
#define DIA2_SUP_MODE 0x8000
#define DIA1_SUP_MODE 0x4000
#define DDA2_ENABLE 0x100
#define DDA1_ENABLE 0x80
#define DIA2_ENABLE 0x40
#define DIA1_ENABLE 0x20
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#define DSINGLE_STEP 0x10 /* not used */
#define DDV_TYPE_MASK 0xc
#define DDV_TYPE_LOAD 0x0
#define DDV_TYPE_STORE 0x4
#define DDV_TYPE_ACCESS 0x8
#define DDV_TYPE_ALWAYS 0xc
#define DDV_COND 0x2
#define DDV_MASK 0x1
int
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sparclite_insert_watchpoint (CORE_ADDR addr, int len, int type)
{
CORE_ADDR dcr;
dcr = read_register (DCR_REGNUM);
if (!(dcr & DDA1_ENABLE))
{
write_register (DDA1_REGNUM, addr);
dcr &= ~(DDA1_ASI_MASK | DDV_TYPE_MASK);
dcr |= (DDA1_SUP_ASI | DDA1_ENABLE);
if (type == 1)
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_LOAD & (~DDV_COND & ~DDV_MASK));
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}
else if (type == 0)
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_STORE & (~DDV_COND & ~DDV_MASK));
}
else
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_ACCESS);
}
write_register (DCR_REGNUM, dcr);
}
else if (!(dcr & DDA2_ENABLE))
{
write_register (DDA2_REGNUM, addr);
dcr &= ~(DDA2_ASI_MASK & DDV_TYPE_MASK);
dcr |= (DDA2_SUP_ASI | DDA2_ENABLE);
if (type == 1)
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_LOAD & ~DDV_COND & ~DDV_MASK);
}
else if (type == 0)
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_STORE & ~DDV_COND & ~DDV_MASK);
}
else
{
write_register (DDV1_REGNUM, 0);
write_register (DDV2_REGNUM, 0xffffffff);
dcr |= (DDV_TYPE_ACCESS);
}
write_register (DCR_REGNUM, dcr);
}
else
return -1;
return 0;
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}
int
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sparclite_remove_watchpoint (CORE_ADDR addr, int len, int type)
{
CORE_ADDR dcr, dda1, dda2;
dcr = read_register (DCR_REGNUM);
dda1 = read_register (DDA1_REGNUM);
dda2 = read_register (DDA2_REGNUM);
if ((dcr & DDA1_ENABLE) && addr == dda1)
write_register (DCR_REGNUM, (dcr & ~DDA1_ENABLE));
else if ((dcr & DDA2_ENABLE) && addr == dda2)
write_register (DCR_REGNUM, (dcr & ~DDA2_ENABLE));
else
return -1;
return 0;
}
int
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sparclite_insert_hw_breakpoint (CORE_ADDR addr, int len)
{
CORE_ADDR dcr;
dcr = read_register (DCR_REGNUM);
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if (!(dcr & DIA1_ENABLE))
{
write_register (DIA1_REGNUM, addr);
write_register (DCR_REGNUM, (dcr | DIA1_ENABLE | DIA1_SUP_MODE));
}
else if (!(dcr & DIA2_ENABLE))
{
write_register (DIA2_REGNUM, addr);
write_register (DCR_REGNUM, (dcr | DIA2_ENABLE | DIA2_SUP_MODE));
}
else
return -1;
return 0;
}
int
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sparclite_remove_hw_breakpoint (CORE_ADDR addr, int shadow)
{
CORE_ADDR dcr, dia1, dia2;
dcr = read_register (DCR_REGNUM);
dia1 = read_register (DIA1_REGNUM);
dia2 = read_register (DIA2_REGNUM);
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if ((dcr & DIA1_ENABLE) && addr == dia1)
write_register (DCR_REGNUM, (dcr & ~DIA1_ENABLE));
else if ((dcr & DIA2_ENABLE) && addr == dia2)
write_register (DCR_REGNUM, (dcr & ~DIA2_ENABLE));
else
return -1;
return 0;
}
int
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sparclite_check_watch_resources (int type, int cnt, int ot)
{
/* Watchpoints not supported on simulator. */
if (strcmp (target_shortname, "sim") == 0)
return 0;
if (type == bp_hardware_breakpoint)
{
if (TARGET_HW_BREAK_LIMIT == 0)
return 0;
else if (cnt <= TARGET_HW_BREAK_LIMIT)
return 1;
}
else
{
if (TARGET_HW_WATCH_LIMIT == 0)
return 0;
else if (ot)
return -1;
else if (cnt <= TARGET_HW_WATCH_LIMIT)
return 1;
}
return -1;
}
CORE_ADDR
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sparclite_stopped_data_address (void)
{
CORE_ADDR dsr, dda1, dda2;
dsr = read_register (DSR_REGNUM);
dda1 = read_register (DDA1_REGNUM);
dda2 = read_register (DDA2_REGNUM);
if (dsr & 0x10)
return dda1;
else if (dsr & 0x20)
return dda2;
else
return 0;
}
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static struct serial *
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open_tty (char *name)
{
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struct serial *desc;
desc = serial_open (name);
if (!desc)
perror_with_name (name);
if (baud_rate != -1)
{
if (serial_setbaudrate (desc, baud_rate))
{
serial_close (desc);
perror_with_name (name);
}
}
serial_raw (desc);
serial_flush_input (desc);
return desc;
}
/* Read a single character from the remote end, masking it down to 7 bits. */
static int
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readchar (struct serial *desc, int timeout)
{
int ch;
char s[10];
ch = serial_readchar (desc, timeout);
switch (ch)
{
case SERIAL_EOF:
error ("SPARClite remote connection closed");
case SERIAL_ERROR:
perror_with_name ("SPARClite communication error");
case SERIAL_TIMEOUT:
error ("SPARClite remote timeout");
default:
if (remote_debug > 0)
{
sprintf (s, "[%02x]", ch & 0xff);
puts_debug ("read -->", s, "<--");
}
return ch;
}
}
static void
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debug_serial_write (struct serial *desc, char *buf, int len)
{
char s[10];
serial_write (desc, buf, len);
if (remote_debug > 0)
{
while (len-- > 0)
{
sprintf (s, "[%02x]", *buf & 0xff);
puts_debug ("Sent -->", s, "<--");
buf++;
}
}
}
static int
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send_resp (struct serial *desc, char c)
{
debug_serial_write (desc, &c, 1);
return readchar (desc, remote_timeout);
}
static void
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close_tty (void *ignore)
{
if (!remote_desc)
return;
serial_close (remote_desc);
remote_desc = NULL;
}
#ifdef HAVE_SOCKETS
static int
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recv_udp_buf (int fd, unsigned char *buf, int len, int timeout)
{
int cc;
fd_set readfds;
FD_ZERO (&readfds);
FD_SET (fd, &readfds);
if (timeout >= 0)
{
struct timeval timebuf;
timebuf.tv_sec = timeout;
timebuf.tv_usec = 0;
cc = select (fd + 1, &readfds, 0, 0, &timebuf);
}
else
cc = select (fd + 1, &readfds, 0, 0, 0);
if (cc == 0)
return 0;
if (cc != 1)
perror_with_name ("recv_udp_buf: Bad return value from select:");
cc = recv (fd, buf, len, 0);
if (cc < 0)
perror_with_name ("Got an error from recv: ");
}
static int
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send_udp_buf (int fd, unsigned char *buf, int len)
{
int cc;
cc = send (fd, buf, len, 0);
if (cc == len)
return;
if (cc < 0)
perror_with_name ("Got an error from send: ");
error ("Short count in send: tried %d, sent %d\n", len, cc);
}
#endif /* HAVE_SOCKETS */
static void
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sparclite_open (char *name, int from_tty)
{
struct cleanup *old_chain;
int c;
char *p;
if (!name)
error ("You need to specify what device or hostname is associated with the SparcLite board.");
target_preopen (from_tty);
unpush_target (&sparclite_ops);
if (remote_target_name)
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xfree (remote_target_name);
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remote_target_name = xstrdup (name);
/* We need a 'serial' or 'udp' keyword to disambiguate host:port, which can
mean either a serial port on a terminal server, or the IP address of a
SPARClite demo board. If there's no colon, then it pretty much has to be
a local device (except for DOS... grrmble) */
p = strchr (name, ' ');
if (p)
{
*p++ = '\000';
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while ((*p != '\000') && isspace (*p))
p++;
if (strncmp (name, "serial", strlen (name)) == 0)
serial_flag = 1;
else if (strncmp (name, "udp", strlen (name)) == 0)
serial_flag = 0;
else
error ("Must specify either `serial' or `udp'.");
}
else
{
p = name;
if (!strchr (name, ':'))
serial_flag = 1; /* No colon is unambiguous (local device) */
else
error ("Usage: target sparclite serial /dev/ttyb\n\
or: target sparclite udp host");
}
if (serial_flag)
{
remote_desc = open_tty (p);
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old_chain = make_cleanup (close_tty, 0 /*ignore*/);
c = send_resp (remote_desc, 0x00);
if (c != 0xaa)
error ("Unknown response (0x%x) from SparcLite. Try resetting the board.",
c);
c = send_resp (remote_desc, 0x55);
if (c != 0x55)
error ("Sparclite appears to be ill.");
}
else
{
#ifdef HAVE_SOCKETS
struct hostent *he;
struct sockaddr_in sockaddr;
unsigned char buffer[100];
int cc;
/* Setup the socket. Must be raw UDP. */
he = gethostbyname (p);
if (!he)
error ("No such host %s.", p);
udp_fd = socket (PF_INET, SOCK_DGRAM, 0);
old_chain = make_cleanup (close, udp_fd);
sockaddr.sin_family = PF_INET;
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sockaddr.sin_port = htons (7000);
memcpy (&sockaddr.sin_addr.s_addr, he->h_addr, sizeof (struct in_addr));
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if (connect (udp_fd, &sockaddr, sizeof (sockaddr)))
perror_with_name ("Connect failed");
buffer[0] = 0x5;
buffer[1] = 0;
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send_udp_buf (udp_fd, buffer, 2); /* Request version */
cc = recv_udp_buf (udp_fd, buffer, sizeof (buffer), 5); /* Get response */
if (cc == 0)
error ("SPARClite isn't responding.");
if (cc < 3)
error ("SPARClite appears to be ill.");
#else
error ("UDP downloading is not supported for DOS hosts.");
#endif /* HAVE_SOCKETS */
}
printf_unfiltered ("[SPARClite appears to be alive]\n");
push_target (&sparclite_ops);
discard_cleanups (old_chain);
return;
}
static void
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sparclite_close (int quitting)
{
if (serial_flag)
close_tty (0);
#ifdef HAVE_SOCKETS
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else if (udp_fd != -1)
close (udp_fd);
#endif
}
#define LOAD_ADDRESS 0x40000000
static void
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download (char *target_name, char *args, int from_tty,
void (*write_routine) (bfd *from_bfd, asection *from_sec,
file_ptr from_addr, bfd_vma to_addr, int len),
void (*start_routine) (bfd_vma entry))
{
struct cleanup *old_chain;
asection *section;
bfd *pbfd;
bfd_vma entry;
int i;
#define WRITESIZE 1024
char *filename;
int quiet;
int nostart;
quiet = 0;
nostart = 0;
filename = NULL;
while (*args != '\000')
{
char *arg;
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while (isspace (*args))
args++;
arg = args;
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while ((*args != '\000') && !isspace (*args))
args++;
if (*args != '\000')
*args++ = '\000';
if (*arg != '-')
filename = arg;
else if (strncmp (arg, "-quiet", strlen (arg)) == 0)
quiet = 1;
else if (strncmp (arg, "-nostart", strlen (arg)) == 0)
nostart = 1;
else
error ("unknown option `%s'", arg);
}
if (!filename)
filename = get_exec_file (1);
pbfd = bfd_openr (filename, gnutarget);
if (pbfd == NULL)
{
perror_with_name (filename);
return;
}
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old_chain = make_cleanup_bfd_close (pbfd);
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if (!bfd_check_format (pbfd, bfd_object))
error ("\"%s\" is not an object file: %s", filename,
bfd_errmsg (bfd_get_error ()));
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for (section = pbfd->sections; section; section = section->next)
{
if (bfd_get_section_flags (pbfd, section) & SEC_LOAD)
{
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bfd_vma section_address;
bfd_size_type section_size;
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file_ptr fptr;
const char *section_name;
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section_name = bfd_get_section_name (pbfd, section);
section_address = bfd_get_section_vma (pbfd, section);
/* Adjust sections from a.out files, since they don't
carry their addresses with. */
if (bfd_get_flavour (pbfd) == bfd_target_aout_flavour)
{
if (strcmp (section_name, ".text") == 0)
section_address = bfd_get_start_address (pbfd);
else if (strcmp (section_name, ".data") == 0)
{
/* Read the first 8 bytes of the data section.
There should be the string 'DaTa' followed by
a word containing the actual section address. */
struct data_marker
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{
char signature[4]; /* 'DaTa' */
unsigned char sdata[4]; /* &sdata */
}
marker;
bfd_get_section_contents (pbfd, section, &marker, 0,
sizeof (marker));
if (strncmp (marker.signature, "DaTa", 4) == 0)
{
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if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
section_address = bfd_getb32 (marker.sdata);
else
section_address = bfd_getl32 (marker.sdata);
}
}
}
section_size = bfd_get_section_size_before_reloc (section);
if (!quiet)
printf_filtered ("[Loading section %s at 0x%x (%d bytes)]\n",
bfd_get_section_name (pbfd, section),
section_address,
section_size);
fptr = 0;
while (section_size > 0)
{
int count;
static char inds[] = "|/-\\";
static int k = 0;
QUIT;
count = min (section_size, WRITESIZE);
write_routine (pbfd, section, fptr, section_address, count);
if (!quiet)
{
printf_unfiltered ("\r%c", inds[k++ % 4]);
gdb_flush (gdb_stdout);
}
section_address += count;
fptr += count;
section_size -= count;
}
}
}
if (!nostart)
{
entry = bfd_get_start_address (pbfd);
if (!quiet)
printf_unfiltered ("[Starting %s at 0x%x]\n", filename, entry);
start_routine (entry);
}
do_cleanups (old_chain);
}
static void
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sparclite_serial_start (bfd_vma entry)
{
char buffer[5];
int i;
buffer[0] = 0x03;
store_unsigned_integer (buffer + 1, 4, entry);
debug_serial_write (remote_desc, buffer, 1 + 4);
i = readchar (remote_desc, remote_timeout);
if (i != 0x55)
error ("Can't start SparcLite. Error code %d\n", i);
}
static void
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sparclite_serial_write (bfd *from_bfd, asection *from_sec, file_ptr from_addr,
bfd_vma to_addr, int len)
{
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char buffer[4 + 4 + WRITESIZE]; /* addr + len + data */
unsigned char checksum;
int i;
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store_unsigned_integer (buffer, 4, to_addr); /* Address */
store_unsigned_integer (buffer + 4, 4, len); /* Length */
bfd_get_section_contents (from_bfd, from_sec, buffer + 8, from_addr, len);
checksum = 0;
for (i = 0; i < len; i++)
checksum += buffer[8 + i];
i = send_resp (remote_desc, 0x01);
if (i != 0x5a)
error ("Bad response from load command (0x%x)", i);
debug_serial_write (remote_desc, buffer, 4 + 4 + len);
i = readchar (remote_desc, remote_timeout);
if (i != checksum)
error ("Bad checksum from load command (0x%x)", i);
}
#ifdef HAVE_SOCKETS
static unsigned short
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calc_checksum (unsigned char *buffer, int count)
{
unsigned short checksum;
checksum = 0;
for (; count > 0; count -= 2, buffer += 2)
checksum += (*buffer << 8) | *(buffer + 1);
if (count != 0)
checksum += *buffer << 8;
return checksum;
}
static void
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sparclite_udp_start (bfd_vma entry)
{
unsigned char buffer[6];
int i;
buffer[0] = 0x3;
buffer[1] = 0;
buffer[2] = entry >> 24;
buffer[3] = entry >> 16;
buffer[4] = entry >> 8;
buffer[5] = entry;
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send_udp_buf (udp_fd, buffer, 6); /* Send start addr */
i = recv_udp_buf (udp_fd, buffer, sizeof (buffer), -1); /* Get response */
if (i < 1 || buffer[0] != 0x55)
error ("Failed to take start address.");
}
static void
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sparclite_udp_write (bfd *from_bfd, asection *from_sec, file_ptr from_addr,
bfd_vma to_addr, int len)
{
unsigned char buffer[2000];
unsigned short checksum;
static int pkt_num = 0;
static unsigned long old_addr = -1;
int i;
while (1)
{
if (to_addr != old_addr)
{
buffer[0] = 0x1; /* Load command */
buffer[1] = 0x1; /* Loading address */
buffer[2] = to_addr >> 24;
buffer[3] = to_addr >> 16;
buffer[4] = to_addr >> 8;
buffer[5] = to_addr;
checksum = 0;
for (i = 0; i < 6; i++)
checksum += buffer[i];
checksum &= 0xff;
send_udp_buf (udp_fd, buffer, 6);
i = recv_udp_buf (udp_fd, buffer, sizeof buffer, -1);
if (i < 1)
error ("Got back short checksum for load addr.");
if (checksum != buffer[0])
error ("Got back bad checksum for load addr.");
pkt_num = 0; /* Load addr resets packet seq # */
old_addr = to_addr;
}
bfd_get_section_contents (from_bfd, from_sec, buffer + 6, from_addr,
len);
checksum = calc_checksum (buffer + 6, len);
buffer[0] = 0x1; /* Load command */
buffer[1] = 0x2; /* Loading data */
buffer[2] = pkt_num >> 8;
buffer[3] = pkt_num;
buffer[4] = checksum >> 8;
buffer[5] = checksum;
send_udp_buf (udp_fd, buffer, len + 6);
i = recv_udp_buf (udp_fd, buffer, sizeof buffer, 3);
if (i == 0)
{
fprintf_unfiltered (gdb_stderr, "send_data: timeout sending %d bytes to address 0x%x retrying\n", len, to_addr);
continue;
}
if (buffer[0] != 0xff)
error ("Got back bad response for load data.");
old_addr += len;
pkt_num++;
return;
}
}
#endif /* HAVE_SOCKETS */
static void
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sparclite_download (char *filename, int from_tty)
{
if (!serial_flag)
#ifdef HAVE_SOCKETS
download (remote_target_name, filename, from_tty, sparclite_udp_write,
sparclite_udp_start);
#else
internal_error (__FILE__, __LINE__, "failed internal consistency check"); /* sparclite_open should prevent this! */
#endif
else
download (remote_target_name, filename, from_tty, sparclite_serial_write,
sparclite_serial_start);
}
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/* Set up the sparclite target vector. */
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static void
init_sparclite_ops (void)
{
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sparclite_ops.to_shortname = "sparclite";
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sparclite_ops.to_longname = "SPARClite download target";
sparclite_ops.to_doc = "Download to a remote SPARClite target board via serial of UDP.\n\
Specify the device it is connected to (e.g. /dev/ttya).";
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sparclite_ops.to_open = sparclite_open;
sparclite_ops.to_close = sparclite_close;
sparclite_ops.to_load = sparclite_download;
sparclite_ops.to_stratum = download_stratum;
sparclite_ops.to_magic = OPS_MAGIC;
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}
void
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_initialize_sparcl_tdep (void)
{
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init_sparclite_ops ();
add_target (&sparclite_ops);
}