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[kernel] Allow for not passing handles in new mailbox calls

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In the new mailbox structure, passing a j6_handle_invalid with a message
would result in a permission denied result, as the process did not have
a handle "0".
This commit is contained in:
Justin C. Miller
2022-10-14 21:55:46 -07:00
parent 516f4f1920
commit c02aa084d1
1 changed files with 10 additions and 0 deletions
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10
src/kernel/syscalls/helpers.h
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@@ -25,6 +25,11 @@ T * construct_handle(j6_handle_t *id, Args... args)
template <typename T> template <typename T>
j6_status_t get_handle(j6_handle_t id, j6_cap_t caps, T *&object) j6_status_t get_handle(j6_handle_t id, j6_cap_t caps, T *&object)
{ {
if (id == j6_handle_invalid) {
object = nullptr;
return j6_status_ok;
}
capability *capdata = g_cap_table.find(id); capability *capdata = g_cap_table.find(id);
if (!capdata || capdata->type != T::type) if (!capdata || capdata->type != T::type)
return j6_err_invalid_arg; return j6_err_invalid_arg;
@@ -46,6 +51,11 @@ inline j6_status_t get_handle(j6_handle_t *id, j6_cap_t caps, T *&object)
template <> template <>
inline j6_status_t get_handle<obj::kobject>(j6_handle_t id, j6_cap_t caps, obj::kobject *&object) inline j6_status_t get_handle<obj::kobject>(j6_handle_t id, j6_cap_t caps, obj::kobject *&object)
{ {
if (id == j6_handle_invalid) {
object = nullptr;
return j6_status_ok;
}
capability *capdata = g_cap_table.find(id); capability *capdata = g_cap_table.find(id);
if (!capdata) if (!capdata)
return j6_err_invalid_arg; return j6_err_invalid_arg;