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[kernel] Move pml4 create/delete into vm_space

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vm_space and page_table continue to take over duties from
page_manager:

- creation and deletion of address spaces / pml4s
- cross-address-space copies for endpoints
- taking over pml4 ownership from process

Also fixed the bug where the wrong process was being set in the cpu
data.

To solve: now the kernel process has its own vm_space which is not
g_kernel_space.
This commit is contained in:
Justin C. Miller
2020-09-18 01:22:49 -07:00
parent ac67111b83
commit 671a0ce0fb
14 changed files with 132 additions and 101 deletions
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8
src/kernel/objects/endpoint.cpp
View File

@@ -1,7 +1,9 @@
#include "objects/endpoint.h"
#include "objects/process.h"
#include "objects/thread.h"
#include "page_manager.h"
#include "scheduler.h"
#include "vm_space.h"
endpoint::endpoint() :
kobject(kobject::type::endpoint)
@@ -86,9 +88,9 @@ endpoint::do_message_copy(const endpoint::thread_data &sender, endpoint::thread_
return j6_err_insufficient;
page_manager *pm = page_manager::get();
void *send_data = pm->get_offset_from_mapped(sender.data, sender.th->tcb()->pml4);
void *recv_data = pm->get_offset_from_mapped(receiver.data, receiver.th->tcb()->pml4);
kutil::memcpy(recv_data, send_data, sender.len);
vm_space &source = sender.th->parent().space();
vm_space &dest = receiver.th->parent().space();
vm_space::copy(source, dest, sender.data, receiver.data, sender.len);
*receiver.len_p = sender.len;
// TODO: this will not work if non-contiguous pages are mapped!!