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38 Commits

Author SHA1 Message Date
Jonas 'Sortie' Termansen 01b59c1947 Convert libc to C. 2016-03-03 23:02:23 +01:00
Jonas 'Sortie' Termansen 02c6316e95 Remove kernel debugger, old kernel US layout and kernel symbol code. 
The debugger has fallen behind and has become a maintenance burden.  It was
the only user of the old kernel US layout system, which is good to get rid
of.  The debugger didn't work with graphical output and was likely to
conflict with the new keyboard system if used, which no longer triggered it.
The kernel symbol code was removed to simplify the kernel.

The kernel debugger was an useful debugging feature, but it needs to be done
in a better way before it can be added back.
 2016-02-22 00:12:26 +01:00
Jonas 'Sortie' Termansen 4b1079510b Execute only programs with an executable bit set. 2016-01-25 17:39:57 +01:00
Jonas 'Sortie' Termansen 2e3d7c45af Add paging no-execute and write protection support. 
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
Jonas 'Sortie' Termansen ff8b2be515 Implement CLOCK_THREAD_CPUTIME_ID and CLOCK_THREAD_SYSTIME_ID. 2016-01-09 02:28:44 +01:00
Jonas 'Sortie' Termansen a45b93785c Fix program loading bugs. 2016-01-08 00:41:20 +01:00
Jonas 'Sortie' Termansen 4b6b06bbc8 Add scram(2). 2015-12-12 22:53:07 +01:00
Jonas 'Sortie' Termansen fc637c8880 Prevent orphan processes from becoming zombies. 2015-10-28 19:36:33 +01:00
Jonas 'Sortie' Termansen 158716f96a Fix ctype invocations with wrong domain. 2015-08-11 15:57:56 +02:00
Jonas 'Sortie' Termansen fffefeba8f Fix execve(2) keeping program descriptors open. 2015-07-09 19:20:49 +02:00
Jonas 'Sortie' Termansen 9acc74de28 Fix read-only mmap with backing store. 2015-06-27 17:06:33 +02:00
Jonas 'Sortie' Termansen bb70eef85b Replace system call array types with pointers. 2015-01-23 14:52:51 +01:00
Jonas 'Sortie' Termansen ab66b91086 Fix NOTO typo. 2014-12-28 20:18:58 +01:00
Jonas 'Sortie' Termansen bbf454e164 Rewrite program loader. 2014-12-04 16:14:17 +01:00
Jonas 'Sortie' Termansen 5143f01b0a Remove sbrk(2). 
Note: This is an incompatible ABI change.
 2014-12-03 23:55:55 +01:00
Jonas 'Sortie' Termansen ba1e0882ec Initialize system call table at compile time. 2014-12-03 14:19:49 +01:00
Jonas 'Sortie' Termansen ba12c1d246 Store loaded programs in special allocations rather than the kernel heap. 2014-11-26 22:27:57 +01:00
Jonas 'Sortie' Termansen 749d123331 Maintain counts of physical frames used for particular purposes. 2014-11-26 22:27:04 +01:00
Jonas 'Sortie' Termansen f8c5adf20f Add #! support to execve(2). 2014-11-26 21:14:13 +01:00
Jonas 'Sortie' Termansen 152d768112 Memory efficiently extract the initrd. 2014-11-24 22:32:57 +01:00
Jonas 'Sortie' Termansen 400eb2238f Refactor process id allocation and accounting. 2014-11-18 20:33:21 +01:00
Jonas 'Sortie' Termansen 25e07a9083 Refactor kernel interrupt and thread register support. 2014-11-18 20:33:21 +01:00
Jonas 'Sortie' Termansen cef4c8d982 Fix waitpid status copying to user-space. 2014-10-04 17:10:25 +02:00
Jonas 'Sortie' Termansen c0ad3d8a80 Fix error case in tfork(2). 2014-09-25 17:27:54 +02:00
Jonas 'Sortie' Termansen e29f0cdd1e Fix class process constructor forgetting some members. 2014-09-23 20:45:57 +02:00
Jonas 'Sortie' Termansen 6558de636e Fix tfork(2) not copying signal properties. 2014-09-23 20:45:57 +02:00
Jonas 'Sortie' Termansen 30cd318c17 Implement signals. 
Note: This is an incompatible ABI change.
 2014-07-22 13:25:39 +02:00
Jonas 'Sortie' Termansen 316ed84e60 Fix process constructor not zeroing the user timers. 2014-07-22 13:16:16 +02:00
Jonas 'Sortie' Termansen b4d494cf8b Implement thread creation in tfork(2). 2014-07-08 17:41:52 +02:00
Jonas 'Sortie' Termansen 8411dce330 Add kernel uthread support. 2014-07-08 17:41:50 +02:00
Jonas 'Sortie' Termansen fdcfb1f2da Handle ELF notes during program load. 2014-07-07 17:52:33 +02:00
Jonas 'Sortie' Termansen 874baffd57 Fix wrongly named system call constants. 2014-06-27 15:49:55 +02:00
Jonas 'Sortie' Termansen 1f72c1637c Maintain fsbase and gsbase as per-thread registers. 
Note: This is an incompatible ABI change.
 2014-05-29 17:07:42 +02:00
Jonas 'Sortie' Termansen 68d379c605 Fix insecure user-space pointer dereferences in sys_execve. 2014-05-16 16:58:33 +02:00
Jonas 'Sortie' Termansen 4283d90102 Fix memory leak of processes that are not process group leaders. 2014-05-16 14:48:27 +02:00
Jonas 'Sortie' Termansen da87b6f0aa Fix troublesome debug assertions in kernel/process.cpp. 2014-03-31 19:47:54 +02:00
Jonas 'Sortie' Termansen 2fe3595feb Add getumask(2). 2014-03-17 19:22:12 +01:00
Jonas 'Sortie' Termansen 98a87fa1e5 Rename Sortix kernel directory to kernel. 2014-03-01 14:37:39 +01:00
Renamed from sortix/process.cpp (Browse further)