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Endpoint syscalls implemented

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This commit is contained in:
Drew Galbraith 2023-06-21 23:14:42 -07:00
parent 69501bfe01
commit c064af5fa7
27 changed files with 391 additions and 42 deletions
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56
zion/lib/message_queue.cpp
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@ -70,3 +70,59 @@ void UnboundedMessageQueue::WriteKernel(uint64_t init,
pending_messages_.PushBack(msg);
}
glcr::ErrorCode SingleMessageQueue::PushBack(uint64_t num_bytes,
const void* bytes,
uint64_t num_caps,
const z_cap_t* caps) {
if (has_written_) {
return glcr::FAILED_PRECONDITION;
}
num_bytes_ = num_bytes;
bytes_ = new uint8_t[num_bytes];
for (uint64_t i = 0; i < num_bytes; i++) {
bytes_[i] = reinterpret_cast<const uint8_t*>(bytes)[i];
}
for (uint64_t i = 0; i < num_caps; i++) {
// FIXME: This would feel safer closer to the relevant syscall.
auto cap = gScheduler->CurrentProcess().ReleaseCapability(caps[i]);
if (!cap) {
return glcr::CAP_NOT_FOUND;
}
caps_.PushBack(cap);
}
has_written_ = true;
return glcr::OK;
}
glcr::ErrorCode SingleMessageQueue::PopFront(uint64_t* num_bytes, void* bytes,
uint64_t* num_caps,
z_cap_t* caps) {
if (!has_written_ || has_read_) {
return glcr::FAILED_PRECONDITION;
}
if (num_bytes_ > *num_bytes) {
return glcr::BUFFER_SIZE;
}
if (caps_.size() > *num_caps) {
return glcr::BUFFER_SIZE;
}
*num_bytes = num_bytes_;
for (uint64_t i = 0; i < num_bytes_; i++) {
reinterpret_cast<uint8_t*>(bytes)[i] = bytes_[i];
}
*num_caps = caps_.size();
auto& proc = gScheduler->CurrentProcess();
for (uint64_t i = 0; i < *num_caps; i++) {
caps[i] = proc.AddExistingCapability(caps_.PopFront());
}
has_read_ = true;
return glcr::OK;
}