gdb: Varying Target Capabilities
F.4 Varying Target Capabilities
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Some targets don't support floating-point, and some would rather not
have to deal with 'long long' operations. Also, different targets will
have different stack sizes, and different bytecode buffer lengths.
Thus, GDB needs a way to ask the target about itself. We haven't
worked out the details yet, but in general, GDB should be able to send
the target a packet asking it to describe itself. The reply should be a
packet whose length is explicit, so we can add new information to the
packet in future revisions of the agent, without confusing old versions
of GDB, and it should contain a version number. It should contain at
least the following information:
* whether floating point is supported
* whether 'long long' is supported
* maximum acceptable size of bytecode stack
* maximum acceptable length of bytecode expressions
* which registers are actually available for collection
* whether the target supports disabled tracepoints
Info Catalog
gdb: Using Agent Expressions
gdb: Agent Expressions
gdb: Rationale