semihosting

["Shaojie Wu" <swu at zmicro dot com>]

Hi,


I am using eCos, GNU debugger to develop a custom-built board, 
I know some other tools support a feature known as semihosting 
to enable a target system which doesn't support various features 
required by the ANSI C library to use the features of the host instead. 
A simple example of this is the use of a host "window" to provide a 
system console, to which the output of printf() etc can be written.
I tried the hello world program on EB40 board and got the following 
results:

with the redboot installed on board, seems I can use prontf() to 
write to console window, but without the redboot,even I use
angle and serial port instead of embeddedICE and jeeni, I could
not see any message on the console window by using printf().So
I am wondering whether there is any way to configure the GNU debugger,
so when I am using jeeni and embeddedICE(without redboot), the 
semihosting function can be still supported. If there is, how 
should I do?


btw: I was told to turn on semi hosting, issue the following command 
after the "target rdi ..." command, "set semihosting_enabled 1". 
I looked at the gdb help, could not find this command(and the semilar
command).

Thanks