11 Commits

Author	SHA1	Message	Date
apio	5e564e9ae3	kernel: Move Thread::self_directory to UserVM ... Since this is only used by user threads, UserVM is a convenient/related place to store the PageDirectory in a RAII manner.	2023-07-09 20:32:42 +02:00
apio	e9e7b22323	kernel: Separate a thread's page directory into two ... The self directory, and the active directory. The active directory is the one the thread is currently using, and the self directory is the one the thread owns. This lets us keep track of both, which fixes ext2 executables crashing the system.	2023-06-25 20:35:40 +02:00
apio	3d157b760c	kernel: Make the stack and loaded program code regions persistent ... This way, they can't be modified by mmap() or munmap().	2023-06-19 12:44:49 +02:00
apio	ae01a31104	kernel: Make sure the stack is 16-byte aligned on program startup ... This is required by the System V ABI and fixes some movaps-related GPFs in ndisasm.	2023-06-19 10:41:32 +02:00
apio	67ed18629d	kernel: Update the VM allocator for userspace to use a linked list ... This can cover the entire address space at once in a more memory-efficient way. Stress-tested using 'base64 /bin/ls' which allocates enough contiguous virtual memory to store the entirety of /bin/ls :) A couple of bugs and fixes later, here we are!	2023-06-18 01:48:48 +02:00
apio	44e4ca804a	kernel: Make sure argument vectors passed to execve() are not too big	2023-05-04 16:36:24 +02:00
apio	95659639e5	kernel: Zero out allocated memory for userspace to avoid leaking sensitive data	2023-04-17 20:11:07 +02:00
apio	3a70accdeb	kernel: Move copy_string_vector_to_userspace to ThreadImage	2023-04-07 14:36:24 +02:00
apio	54f2d35416	kernel: Add the fork() system call	2023-03-18 23:45:48 +01:00
apio	a4ac3c85ed	kernel+libc: Copy argv to userspace	2023-03-18 22:25:19 +01:00
apio	8c72e9a49a	kernel: Add an exec() system call ... Doesn't support arguments or environment for now.	2023-03-16 22:44:58 +01:00