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base-hw: remove throw from ipc_call code path

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This eliminates the dependency of the IPC-call operation from the cxx
heap.

Fixes #3612
This commit is contained in:
Norman Feske 2022-01-24 10:34:22 +01:00
parent 0bb2e61e9e
commit 3e4af3a567
1 changed files with 13 additions and 12 deletions
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25
repos/base-hw/src/lib/base/ipc.cc
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@ -96,22 +96,23 @@ Rpc_exception_code Genode::ipc_call(Native_capability dst,
{ {
Native_utcb &utcb = *Thread::myself()->utcb(); Native_utcb &utcb = *Thread::myself()->utcb();
retry<Genode::Allocator::Out_of_memory>( /*
[&] () { * Issue IPC call, upgrade the PD's capability slab on demand.
*/
for (bool done = false; !done; ) {
copy_msg_to_utcb(snd_msg, *Thread::myself()->utcb()); copy_msg_to_utcb(snd_msg, *Thread::myself()->utcb());
switch (Kernel::send_request_msg(Capability_space::capid(dst), switch (Kernel::send_request_msg(Capability_space::capid(dst),
(unsigned)rcv_caps)) { (unsigned)rcv_caps)) {
case -1: throw Blocking_canceled(); case -1: throw Blocking_canceled();
case -2: throw Allocator::Out_of_memory(); case -2: upgrade_capability_slab(); break;
default: default: done = true; break;
copy_utcb_to_msg(utcb, rcv_msg); }
} }
}, copy_utcb_to_msg(utcb, rcv_msg);
[&] () { upgrade_capability_slab(); });
return Rpc_exception_code((int)utcb.exception_code()); return Rpc_exception_code((int)utcb.exception_code());
} }