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| <h3 class="section">F.4 Varying Target Capabilities</h3> |
| |
| <p>Some targets don't support floating-point, and some would rather not |
| have to deal with <code>long long</code> operations. Also, different targets |
| will have different stack sizes, and different bytecode buffer lengths. |
| |
| <p>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: |
| |
| <ul> |
| <li>whether floating point is supported |
| |
| <li>whether <code>long long</code> is supported |
| |
| <li>maximum acceptable size of bytecode stack |
| |
| <li>maximum acceptable length of bytecode expressions |
| |
| <li>which registers are actually available for collection |
| |
| <li>whether the target supports disabled tracepoints |
| |
| </ul> |
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