2e3d7c45af
Add paging no-execute and write protection support.
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Enable the NX bit on x86_64 and set if not PROT_EXEC and enable the write
protection mode (CR0.WP) that disables the default behavior where the kernel
is able to write to read-only memory. Fix kernel broken assumptions it can
access read-only memory and take care to never set PROT_KWRITE on user-space
pages unless PROT_WRITE is also set, otherwise user-space will be able to
write to read-only memory.
This achieves X^W in the whole system except for the core kernel itself as
it is currently don't know the purpose of pages when identity mapping the
first 4 MiB.
2016-01-25 17:39:57 +01:00
dad5c57f33
Allow bootloader bitmap framebuffer modesetting.
2016-01-08 19:56:11 +01:00
3e068bc88f
Fix x86 Alignment Check and Security Exception handlers.
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The processor pushes an error code when delivering these exception.
Discovered by Alexandros Alexandrou.
2016-01-07 19:17:04 +01:00
12b5044bc7
Fix signal delivery during context switch.
2015-10-09 16:17:52 +02:00
0fc3d70716
Clear registers after system calls.
2015-08-26 16:29:18 +02:00
218875eb79
Initialize paging before KernelInit.
2015-08-21 21:25:00 +02:00
a422c394b8
Initialize the GDT in the bootstrap assembly.
2015-08-21 21:25:00 +02:00
524a028a4f
Forward compatibility with future rename of _start to __start.
2014-12-28 20:18:58 +01:00
ba1e0882ec
Initialize system call table at compile time.
2014-12-03 14:19:49 +01:00
35708fa900
Retire calltrace support in favor of the kernel debugger.
2014-12-01 21:38:06 +01:00
749d123331
Maintain counts of physical frames used for particular purposes.
2014-11-26 22:27:04 +01:00
25e07a9083
Refactor kernel interrupt and thread register support.
2014-11-18 20:33:21 +01:00
7b3e2fa229
Clean up kernel thread creation code.
2014-11-18 18:10:22 +01:00
30cd318c17
Implement signals.
...
Note: This is an incompatible ABI change.
2014-07-22 13:25:39 +02:00
1f72c1637c
Maintain fsbase and gsbase as per-thread registers.
...
Note: This is an incompatible ABI change.
2014-05-29 17:07:42 +02:00
0c48dfca96
Fix 4 KiB memory leak on x86_64 for each process.
2014-05-16 14:48:27 +02:00
e941ff0430
Rename useresp to esp and userrsp to rsp.
2014-03-17 19:22:13 +01:00
a133a7717e
Refactor i386 and x86_64 interrupt support.
2014-03-17 19:22:13 +01:00
cacd010066
Update kernel/{x64/x64,x86/x86}.cpp to current coding conventions.
2014-03-01 14:37:41 +01:00
fcb8ae3af3
Update kernel/{x64,x86}/thread.cpp to current coding conventions.
2014-03-01 14:37:41 +01:00
ccb0f368a3
Update kernel/{x64,x86}/process.cpp to current coding conventions.
2014-03-01 14:37:41 +01:00
a099f82890
Update kernel memory management to current coding conventions.
2014-03-01 14:37:40 +01:00
6788f0096e
Preprocess assembly files with the C preprocessor.
2014-03-01 14:37:40 +01:00
98a87fa1e5
Rename Sortix kernel directory to kernel.
2014-03-01 14:37:39 +01:00
Jonas 'Sortie' Termansen