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[kernel] Make capabilities/handles global

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Instead of handles / capabilities having numeric ids that are only valid
for the owning process, they are now global in a system capabilities
table. This will allow for specifying capabilities in IPC that doesn't
need to be kernel-controlled.

Processes will still need to be granted access to given capabilities,
but that can become a simpler system call than the current method of
sending them through mailbox messages (and worse, having to translate
every one into a new capability like was the case before). In order to
track which handles a process has access to, a new node_set based on
node_map allows for an efficient storage and lookup of handles.
This commit is contained in:
Justin C. Miller
2022-10-10 21:19:25 -07:00
parent 41bb97b179
commit 9ac4e51224
27 changed files with 337 additions and 383 deletions
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16
src/libraries/j6/init.cpp
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@@ -12,26 +12,26 @@
j6_handle_t __handle_self;
namespace {
constexpr size_t static_arr_size = 8;
j6_handle_t handle_array[static_arr_size];
constexpr size_t static_arr_count = 8;
j6_handle_descriptor handle_array[static_arr_count];
} // namespace
j6_handle_t
j6_find_first_handle(j6_object_type obj_type)
{
size_t count = static_arr_size;
j6_handle_t *handles = handle_array;
size_t count = static_arr_count;
j6_handle_descriptor *handles = handle_array;
j6_status_t s = j6_handle_list(handles, &count);
if (s != j6_err_insufficient && s != j6_status_ok)
return j6_handle_invalid;
if (count > static_arr_size)
count = static_arr_size;
if (count > static_arr_count)
count = static_arr_count;
for (size_t i = 0; i < count; ++i) {
uint8_t type = (handles[i] >> 56);
if (type == obj_type) return handles[i];
j6_handle_descriptor &desc = handle_array[i];
if (desc.type == obj_type) return desc.handle;
}
return j6_handle_invalid;