65 Commits

Author	SHA1	Message	Date
EDiasAlberto	5c661c2e24	Feat: pointer validation checks string across multiple pages and handle kernel page faults	2024-11-29 23:49:49 +00:00
EDiasAlberto	5f40d83e66	Implement MMU-based user memory validation	2024-11-29 23:03:31 +00:00
EDiasAlberto	4f84a83611	Refactor: abstract new page allocation to one general function and make helper functions static	2024-11-27 19:41:22 +00:00
EDiasAlberto	c74a8c55aa	Implement stack growth for system calls and add stack pointer tracking to thread	2024-11-27 19:21:43 +00:00
Gleb Koval	aedb72246b	fix: do not acquire filesys_lock for tell and seek	2024-11-24 15:41:18 +00:00
Gleb Koval	8567434231	Use a single exit_status instead of two	2024-11-15 17:28:04 +00:00
sBubshait	ea3b3594ea	Update fd_hash to use the fd itself as the hash value for performance, w/ G & E	2024-11-15 15:53:01 +00:00
sBubshait	6b1dbdd34f	Update thread and syscall to use local fd counter instead global one, preventing overflow	2024-11-15 15:48:56 +00:00
sBubshait	82d45880f7	Update validate_user_pointer to start from the beginning of the page rather than the given ptr	2024-11-15 13:51:10 +00:00
sBubshait	1c757ecdfe	Update syscall to add more helpful comments for clarity and readability	2024-11-15 13:51:10 +00:00
sBubshait	fa2fb4a711	Refactor system call comments for accuracy and grammar	2024-11-13 18:48:23 +00:00
sBubshait	31ea215805	Refactor validate_user_string to remove unnecessary variable to track length of str	2024-11-13 18:30:24 +00:00
sBubshait	9549ca28e5	Refactor syscall: Use EXIT_FAILURE instead of magic numbers & close files on failure	2024-11-13 18:18:41 +00:00
sBubshait	b1c5819469	Avoid masking the struct syscall_arguments using typedef for consistency	2024-11-13 18:06:51 +00:00
sBubshait	287130ca7b	Update syscall.c to use syscall_exit on failure instead of calling thread_exit directly	2024-11-13 18:02:08 +00:00
sBubshait	4f586bb4da	Fix Bug: Free all entries in the fd hashtable when the process exits, w/ E	2024-11-13 17:42:25 +00:00
sBubshait	d890c2353e	Add constant MAX_SYSCALL_ARGS to avoid magic numbers [Gleb]	2024-11-13 17:16:15 +00:00
sBubshait	eb4f23c290	Add validate_user_string helper function to validate that a string is fully conatined within user vm	2024-11-13 17:11:37 +00:00
sBubshait	26de38cdba	Update validate_user_pointer to check if the memory block is mapped into a physical address	2024-11-13 16:39:45 +00:00
sBubshait	6e59e8c9f3	Update validate_user_pointer to be a void function	2024-11-13 16:22:16 +00:00
Themis Demetriades	3418425f20	Don't acquire filesys lock when calling exec	2024-11-12 16:08:27 +00:00
Gleb Koval	59e7a64f8e	Only check user pages rather than all bytes in-between, for known-size pointers	2024-11-12 15:48:22 +00:00
Gleb Koval	cf4bf90cbb	Implement user pointer checking for C strings	2024-11-12 15:34:45 +00:00
Gleb Koval	9a6abab95e	Check access to user memory using page fault method (via get_user and put_user).	2024-11-12 15:00:16 +00:00
Gleb Koval	44f6a85163	Add get_user and put_user provided by spec.	2024-11-12 14:50:53 +00:00
Themis Demetriades	a69b9c808e	Update start_process to acquire filesys lock when loading user process file	2024-11-12 14:21:33 +00:00
EDiasAlberto	1bfd73b202	Comment syscall functions and handlers	2024-11-10 01:32:58 +00:00
sBubshait	e40794e672	Fix Bug in fd_get_file: In case fd not found, then returns NULL, w/ E	2024-11-08 16:48:19 +00:00
sBubshait	8912ef4660	Implement writing to file system files in the write system call, w/ E	2024-11-08 16:26:47 +00:00
EDiasAlberto	18694d7b62	Implement file reading syscall and fix fd validation w/ S.	2024-11-08 16:25:49 +00:00
sBubshait	2a1cc3c361	Implement filesize and tell system calls, w/ E	2024-11-08 16:14:53 +00:00
EDiasAlberto	3cfbe198e0	Implement syscall for seek w/ S.	2024-11-08 16:10:46 +00:00
EDiasAlberto	75bd3fbde0	Implement syscall for close() and fix typing bug in fd_get_file w/ S.	2024-11-08 16:02:51 +00:00
sBubshait	a80084e907	Fix Bug in fd_get_file declaration use open_file instead of file, w/ E	2024-11-08 15:54:28 +00:00
sBubshait	5424276603	Add a helper function to get a file from its descriptor (FD), w/ E	2024-11-08 15:50:48 +00:00
EDiasAlberto	92e93b8060	Implement syscall for file opening and refactor open_files initialisation in thread.c w/ S.	2024-11-08 15:33:47 +00:00
sBubshait	5bbe7a03c0	Add in syscall hash helper functions for open_file struct: fd_hash and fd_less, w/ E	2024-11-08 15:12:08 +00:00
sBubshait	b112824a64	Implement the exec system call through process_execute, w/ E	2024-11-08 14:41:27 +00:00
EDiasAlberto	dca9d8f5a3	Implement syscall for file removal w/ S.	2024-11-08 14:35:23 +00:00
EDiasAlberto	a8676f2e09	Implement syscall for file creation, with relevant locks w/ S.	2024-11-08 14:34:08 +00:00
sBubshait	26e38be761	Update validate_user_pointer to check if the ptr is mapped to a physical memory address, w/ E	2024-11-08 14:21:16 +00:00
sBubshait	39018419cd	Fix Bug in Process.c to print the exit statement in process_exit instead of exit syscall to handle unexpected/bad exits	2024-11-07 12:15:29 +00:00
Themis Demetriades	1ca9d09512	Update exit () syscall to print correct termination message	2024-11-06 23:01:10 +00:00
sBubshait	02fff62ca2	Refactor syscall.c to follow PintOS styling, w/ E	2024-11-05 23:24:41 +00:00
EDiasAlberto	f4290c31f3	Implement syscall_read for console input w/ S.	2024-11-05 23:20:18 +00:00
sBubshait	01933cb5de	Implement the write system call, w/ E	2024-11-05 23:07:07 +00:00
EDiasAlberto	b3e23eb1cc	Implement system call wait w/ S.	2024-11-05 22:48:35 +00:00
EDiasAlberto	421f2c1206	Refactor function names and includes in syscall.c to avoid conflicts w/ S.	2024-11-05 22:46:21 +00:00
sBubshait	e9c4061531	Implement the exit system call, w/ E	2024-11-05 22:38:45 +00:00
EDiasAlberto	f8e529e877	Add UNUSED tag to system call function skeletons w/ S.	2024-11-04 01:02:04 +00:00