This adds bits for architectures, SoCs or boards to restrict
memory access in GDB stub. This is mainly to make sure
GDB stub only read/write to memory that can be legally accessed
without resulting in memory faults.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
Adds a new function gdb_bin2hex() to convert binary into
hexadecimal string representation. This is similar to
bin2hex() but does not force a null character at the end
of the output buffer. This avoids an issue where the last
character of the hexadecimal string is replaced with
null character before sending to GDB.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
It implements gdb remote protocol to talk with a host gdb during the
debug session. The implementation is divided in three layers:
1 - The top layer that is responsible for the gdb remote protocol.
2 - An architecture specific layer responsible to write/read registers,
set breakpoints, handle exceptions, ...
3 - A transport layer to be used to communicate with the host
The communication with GDB in the host is synchronous and the systems
stops execution waiting for instructions and return its execution after
a "continue" or "step" command. The protocol has an exception that is
when the host sends a packet to cause an interruption, usually triggered
by a Ctrl-C. This implementation ignores this instruction though.
This initial work supports only X86 using uart as backend.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
