static int
mips_fetch_word PARAMS ((CORE_ADDR addr));
-static void
-mips_store_word PARAMS ((CORE_ADDR addr, int value));
+static int
+mips_store_word PARAMS ((CORE_ADDR addr, int value, char *old_contents));
static int
mips_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, int len,
static void
mips_files_info PARAMS ((struct target_ops *ignore));
-static void
-mips_load PARAMS ((char *args, int from_tty));
-
static void
mips_create_inferior PARAMS ((char *execfile, char *args, char **env));
all hell to break loose--the rest of GDB will tend to get left in an
inconsistent state. */
-static void NORETURN
+static NORETURN void
mips_error (va_alist)
va_dcl
{
static int state = 0;
static char nextstate[5] = { '<', 'I', 'D', 'T', '>' };
+ if (state == 5)
+ timeout = 1;
ch = SERIAL_READCHAR (mips_desc, timeout);
if (ch == SERIAL_EOF)
mips_error ("End of file from remote");
mips_error ("Error reading from remote: %s", safe_strerror (errno));
if (sr_get_debug () > 1)
{
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
if (ch != SERIAL_TIMEOUT)
- printf_filtered ("Read '%c' %d 0x%x\n", ch, ch, ch);
+ printf_unfiltered ("Read '%c' %d 0x%x\n", ch, ch, ch);
else
- printf_filtered ("Timed out in read\n");
+ printf_unfiltered ("Timed out in read\n");
}
/* If we have seen <IDT> and we either time out, or we see a @
&& ! mips_initializing)
{
if (sr_get_debug () > 0)
- printf_filtered ("Reinitializing MIPS debugging mode\n");
- SERIAL_WRITE (mips_desc, "\rdb tty0\r", sizeof "\rdb tty0\r" - 1);
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Reinitializing MIPS debugging mode\n");
+ SERIAL_WRITE (mips_desc, "\015db tty0\015", sizeof "\015db tty0\015" - 1);
sleep (1);
mips_need_reply = 0;
{
/* Printing the character here lets the user of gdb see
what the program is outputting, if the debugging is
- being done on the console port. FIXME: Perhaps this
- should be filtered? */
+ being done on the console port. Don't use _filtered;
+ we can't deal with a QUIT out of target_wait. */
if (! mips_initializing || sr_get_debug () > 0)
{
- putchar_unfiltered (ch);
+ if (ch < 0x20 && ch != '\n')
+ {
+ putchar_unfiltered ('^');
+ putchar_unfiltered (ch + 0x40);
+ }
+ else
+ putchar_unfiltered (ch);
gdb_flush (gdb_stdout);
}
if (sr_get_debug () > 0)
{
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
packet[HDR_LENGTH + len + TRLR_LENGTH] = '\0';
- printf_filtered ("Writing \"%s\"\n", packet + 1);
+ printf_unfiltered ("Writing \"%s\"\n", packet + 1);
}
if (SERIAL_WRITE (mips_desc, packet,
{
hdr[HDR_LENGTH] = '\0';
trlr[TRLR_LENGTH] = '\0';
- printf_filtered ("Got ack %d \"%s%s\"\n",
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Got ack %d \"%s%s\"\n",
HDR_GET_SEQ (hdr), hdr + 1, trlr);
}
/* An acknowledgement is probably a duplicate; ignore it. */
if (! HDR_IS_DATA (hdr))
{
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
if (sr_get_debug () > 0)
- printf_filtered ("Ignoring unexpected ACK\n");
+ printf_unfiltered ("Ignoring unexpected ACK\n");
continue;
}
/* If this is the wrong sequence number, ignore it. */
if (HDR_GET_SEQ (hdr) != mips_receive_seq)
{
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
if (sr_get_debug () > 0)
- printf_filtered ("Ignoring sequence number %d (want %d)\n",
+ printf_unfiltered ("Ignoring sequence number %d (want %d)\n",
HDR_GET_SEQ (hdr), mips_receive_seq);
continue;
}
if (i < len)
{
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
if (sr_get_debug () > 0)
- printf_filtered ("Got new SYN after %d chars (wanted %d)\n",
+ printf_unfiltered ("Got new SYN after %d chars (wanted %d)\n",
i, len);
continue;
}
}
if (err == -2)
{
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
if (sr_get_debug () > 0)
- printf_filtered ("Got SYN when wanted trailer\n");
+ printf_unfiltered ("Got SYN when wanted trailer\n");
continue;
}
break;
if (sr_get_debug () > 0)
- printf_filtered ("Bad checksum; data %d, trailer %d\n",
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Bad checksum; data %d, trailer %d\n",
mips_cksum (hdr, buff, len),
TRLR_GET_CKSUM (trlr));
if (sr_get_debug () > 0)
{
ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
- printf_filtered ("Writing ack %d \"%s\"\n", mips_receive_seq,
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
ack + 1);
}
if (sr_get_debug () > 0)
{
buff[len] = '\0';
- printf_filtered ("Got packet \"%s\"\n", buff);
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Got packet \"%s\"\n", buff);
}
/* We got the packet. Send an acknowledgement. */
if (sr_get_debug () > 0)
{
ack[HDR_LENGTH + TRLR_LENGTH] = '\0';
- printf_filtered ("Writing ack %d \"%s\"\n", mips_receive_seq,
+ /* Don't use _filtered; we can't deal with a QUIT out of
+ target_wait, and I think this might be called from there. */
+ printf_unfiltered ("Writing ack %d \"%s\"\n", mips_receive_seq,
ack + 1);
}
/* The board seems to want to send us a packet. I don't know what
it means. The packet seems to be triggered by a carriage return
character, although perhaps any character would do. */
- cr = '\r';
+ cr = '\015';
+ /* FIXME check the result from this */
SERIAL_WRITE (mips_desc, &cr, 1);
if (mips_receive_packet (buff, 0, 3) < 0)
cc = '\003';
SERIAL_WRITE (mips_desc, &cc, 1);
sleep (2);
- SERIAL_WRITE (mips_desc, "\rdb tty0\r", sizeof "\rdb tty0\r" - 1);
+ SERIAL_WRITE (mips_desc, "\015db tty0\015", sizeof "\015db tty0\015" - 1);
sleep (1);
- cr = '\r';
+ cr = '\015';
SERIAL_WRITE (mips_desc, &cr, 1);
}
mips_receive_packet (buff, 1, 3);
if (mips_desc == (serial_t) NULL)
perror_with_name (name);
+ if (baud_rate != -1)
+ {
+ if (SERIAL_SETBAUDRATE (mips_desc, baud_rate))
+ {
+ SERIAL_CLOSE (mips_desc);
+ perror_with_name (name);
+ }
+ }
+
SERIAL_RAW (mips_desc);
mips_is_open = 1;
return;
}
- val = mips_request ('r', (unsigned int) mips_map_regno (regno),
- (unsigned int) 0, &err, mips_receive_wait);
- if (err)
- mips_error ("Can't read register %d: %s", regno, safe_strerror (errno));
+ if (regno == FP_REGNUM || regno == ZERO_REGNUM)
+ /* FP_REGNUM on the mips is a hack which is just supposed to read
+ zero (see also mips-nat.c). */
+ val = 0;
+ else
+ {
+ val = mips_request ('r', (unsigned int) mips_map_regno (regno),
+ (unsigned int) 0, &err, mips_receive_wait);
+ if (err)
+ mips_error ("Can't read register %d: %s", regno,
+ safe_strerror (errno));
+ }
{
char buf[MAX_REGISTER_RAW_SIZE];
return val;
}
-/* Store a word to the target board. */
+/* Store a word to the target board. Returns errno code or zero for
+ success. If OLD_CONTENTS is non-NULL, put the old contents of that
+ memory location there. */
-static void
-mips_store_word (addr, val)
+static int
+mips_store_word (addr, val, old_contents)
CORE_ADDR addr;
int val;
+ char *old_contents;
{
int err;
+ unsigned int oldcontents;
- mips_request ('D', (unsigned int) addr, (unsigned int) val, &err,
- mips_receive_wait);
+ oldcontents = mips_request ('D', (unsigned int) addr, (unsigned int) val,
+ &err,
+ mips_receive_wait);
if (err)
{
/* Data space failed; try instruction space. */
- mips_request ('I', (unsigned int) addr, (unsigned int) val, &err,
- mips_receive_wait);
+ oldcontents = mips_request ('I', (unsigned int) addr,
+ (unsigned int) val, &err,
+ mips_receive_wait);
if (err)
- mips_error ("Can't write address 0x%x: %s", addr, safe_strerror (errno));
+ return errno;
}
+ if (old_contents != NULL)
+ store_unsigned_integer (old_contents, 4, oldcontents);
+ return 0;
}
/* Read or write LEN bytes from inferior memory at MEMADDR,
/* Allocate buffer of that many longwords. */
register char *buffer = alloca (count * 4);
+ int status;
+
if (write)
{
/* Fill start and end extra bytes of buffer with existing data. */
for (i = 0; i < count; i++, addr += 4)
{
- mips_store_word (addr, extract_unsigned_integer (&buffer[i*4], 4));
+ status = mips_store_word (addr,
+ extract_unsigned_integer (&buffer[i*4], 4),
+ NULL);
+ /* Report each kilobyte (we download 32-bit words at a time) */
+ if (i % 256 == 255)
+ {
+ printf_unfiltered ("*");
+ fflush (stdout);
+ }
+ if (status)
+ {
+ errno = status;
+ return 0;
+ }
/* FIXME: Do we want a QUIT here? */
}
+ if (count >= 256)
+ printf_unfiltered ("\n");
}
else
{
CORE_ADDR entry_pt;
if (args && *args)
- mips_error ("Can't pass arguments to remote MIPS board.");
+ {
+ warning ("\
+Can't pass arguments to remote MIPS board; arguments ignored.");
+ /* And don't try to use them on the next "run" command. */
+ execute_command ("set args", 0);
+ }
if (execfile == 0 || exec_bfd == 0)
- mips_error ("No exec file specified");
+ error ("No executable file specified");
entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd);
generic_mourn_inferior ();
}
\f
+/* We can write a breakpoint and read the shadow contents in one
+ operation. */
+
+/* The IDT board uses an unusual breakpoint value, and sometimes gets
+ confused when it sees the usual MIPS breakpoint instruction. */
+
+#define BREAK_INSN (0x00000a0d)
+#define BREAK_INSN_SIZE (4)
+
+/* Insert a breakpoint on targets that don't have any better breakpoint
+ support. We read the contents of the target location and stash it,
+ then overwrite it with a breakpoint instruction. ADDR is the target
+ location in the target machine. CONTENTS_CACHE is a pointer to
+ memory allocated for saving the target contents. It is guaranteed
+ by the caller to be long enough to save sizeof BREAKPOINT bytes (this
+ is accomplished via BREAKPOINT_MAX). */
+
+static int
+mips_insert_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+ int status;
+
+ return mips_store_word (addr, BREAK_INSN, contents_cache);
+}
+
+static int
+mips_remove_breakpoint (addr, contents_cache)
+ CORE_ADDR addr;
+ char *contents_cache;
+{
+ return target_write_memory (addr, contents_cache, BREAK_INSN_SIZE);
+}
+\f
/* The target vector. */
struct target_ops mips_ops =
{
"mips", /* to_shortname */
"Remote MIPS debugging over serial line", /* to_longname */
- "Debug a board using the MIPS remote debugging protocol over a serial line.\n\
-Specify the serial device it is connected to (e.g., /dev/ttya).", /* to_doc */
+ "\
+Debug a board using the MIPS remote debugging protocol over a serial line.\n\
+The argument is the device it is connected to or, if it contains a colon,\n\
+HOST:PORT to access a board over a network", /* to_doc */
mips_open, /* to_open */
mips_close, /* to_close */
NULL, /* to_attach */
mips_prepare_to_store, /* to_prepare_to_store */
mips_xfer_memory, /* to_xfer_memory */
mips_files_info, /* to_files_info */
- NULL, /* to_insert_breakpoint */
- NULL, /* to_remove_breakpoint */
+ mips_insert_breakpoint, /* to_insert_breakpoint */
+ mips_remove_breakpoint, /* to_remove_breakpoint */
NULL, /* to_terminal_init */
NULL, /* to_terminal_inferior */
NULL, /* to_terminal_ours_for_output */
mips_mourn_inferior, /* to_mourn_inferior */
NULL, /* to_can_run */
NULL, /* to_notice_signals */
+ 0, /* to_stop */
process_stratum, /* to_stratum */
NULL, /* to_next */
1, /* to_has_all_memory */
projects / deliverable / binutils-gdb.git / blobdiff