--target=mips-idt-ecoff.
Use these GDB commands to specify the connection to your target board:
target mips port
gdb with the
name of your program as the argument. To connect to the board, use the
command target mips port, where port is the name of
the serial port connected to the board. If the program has not already
been downloaded to the board, you may use the load command to
download it. You can then use all the usual GDB commands.
For example, this sequence connects to the target board through a serial port, and loads and runs a program called prog through the debugger:
host$ gdb prog
GDB is free software and ...
(gdb) target mips /dev/ttyb
(gdb) load prog
(gdb) run
target mips hostname:portnumber
hostname:portnumber.
target pmon port
target ddb port
target lsi port
target r3900 dev
target array dev
set processor args
show processor
set processor command to set the type of MIPS
processor when you want to access processor-type-specific registers.
For example, set processor r3041 tells GDB
to use the CPU registers appropriate for the 3041 chip.
Use the show processor command to see what MIPS processor GDB
is using. Use the info reg command to see what registers
GDB is using.
set mipsfpu double
set mipsfpu single
set mipsfpu none
show mipsfpu
set mipsfpu none (if you
need this, you may wish to put the command in your GDB init
file). This tells GDB how to find the return value of
functions which return floating point values. It also allows
GDB to avoid saving the floating point registers when calling
functions on the board. If you are using a floating point coprocessor
with only single precision floating point support, as on the R4650
processor, use the command set mipsfpu single. The default
double precision floating point coprocessor may be selected using
set mipsfpu double.
In previous versions the only choices were double precision or no
floating point, so set mipsfpu on will select double precision
and set mipsfpu off will select no floating point.
As usual, you can inquire about the mipsfpu variable with
show mipsfpu.
set remotedebug n
show remotedebug
remotedebug variable. If you set it to 1 using
set remotedebug 1, every packet is displayed. If you set it
to 2, every character is displayed. You can check the current value
at any time with the command show remotedebug.
set timeout seconds
set retransmit-timeout seconds
show timeout
show retransmit-timeout
set timeout seconds command. The
default is 5 seconds. Similarly, you can control the timeout used while
waiting for an acknowledgement of a packet with the set
retransmit-timeout seconds command. The default is 3 seconds.
You can inspect both values with show timeout and show
retransmit-timeout. (These commands are only available when
GDB is configured for --target=mips-idt-ecoff.)
The timeout set by set timeout does not apply when GDB
is waiting for your program to stop. In that case, GDB waits
forever because it has no way of knowing how long the program is going
to run before stopping.