Commit graph

119 commits

Author SHA1 Message Date
Robert Morris deaff5d8a6 no buf->qnext 2019-09-24 14:41:51 -04:00
Xi Wang 9ead904afe fix major validation
fileread/filewrite should validate major to avoid buffer overflows
or bogus function pointers.
2019-09-23 20:01:56 -04:00
Robert Morris 37df68e5de story is more complex than I thought. 2019-09-23 07:24:41 -04:00
Robert Morris d175beadf5 bug fix: reparent() sometimes deadlocked
bug fix: exit() sometimes released a different parent lock than it acquired
usertests
2019-09-23 06:50:25 -04:00
Robert Morris d940fd122d don't leak memory if exec() arguments are invalid. 2019-09-21 04:54:25 -04:00
Robert Morris 7c7ed20822 don't leak a file system block if the buf argument to write is invalid
and a usertest
2019-09-20 13:09:26 -04:00
Robert Morris e1a37303c8 yet another sbrk() bug fix, and usertest 2019-09-20 12:13:57 -04:00
Robert Morris 4de161f973 don't panic if a program frees all its memory with sbrk().
if a program sbrk()'s to a non-page-boundary, don't free that page.
corresponding usertests.
2019-09-20 11:35:27 -04:00
Robert Morris ca30cac702 more incorrect cast to uint 2019-09-20 10:27:03 -04:00
Robert Morris 402e7b5605 fix a potential kernel crash
add a regression test for it
2019-09-20 09:41:03 -04:00
Robert Morris 57e40a0204 nits 2019-09-20 06:02:47 -04:00
Robert Morris 2df42355f7 all of PTE_FLAGS 2019-09-17 06:07:58 -04:00
Robert Morris 036b5edf12 set architecture riscv:rv64 -- fix gdb trampoline disassembly, thanks jonathan 2019-09-12 10:48:48 -04:00
Frans Kaashoek 7e6c37e67e Support exit status for exit/wait
One test case for returning a exit status
Passes usertests, but haven't used it to simplify tests
2019-09-10 12:30:10 -04:00
Frans Kaashoek 035cca95fe Make the end variable be really at the end of bss, and delete + 4096 in freerange() 2019-09-08 15:19:19 -04:00
Robert Morris e5b7fa62cc thanks to Anthony Coulter 2019-09-08 06:51:58 -04:00
Robert Morris 25e113138d sfence.vma in trampoline as well 2019-09-03 16:29:48 -04:00
Robert Morris 9b9e2dd0f2 fix sfence_vma comment 2019-09-03 16:25:11 -04:00
Robert Morris 86a1d4b295 sfence_vma after satp 2019-09-03 15:45:07 -04:00
Frans Kaashoek 510bcde894 Add major/minor/mkdev
Maybe apply this change to master
2019-08-23 19:41:53 -04:00
Frans Kaashoek d98ddadd79 Also release buffer on failed copyout 2019-08-20 12:46:56 -04:00
Frans Kaashoek 6005ef5a1c Release buffer also when copyin fails 2019-08-20 11:57:24 -04:00
Frans Kaashoek d9818b89e1 512 -> BSIZE 2019-08-20 11:56:56 -04:00
Frans Kaashoek a825f22cf8 Merge remote-tracking branch 'origin/master' into riscv 2019-08-19 19:27:29 -04:00
Frans Kaashoek 21ad8c76bc A few now unused DOC 2019-08-19 18:12:19 -04:00
Frans Kaashoek e10f797762 Merge remote-tracking branch 'origin/master' into riscv 2019-08-19 13:35:47 -04:00
Frans Kaashoek 2501560cd6 Cosmetic cleanup: fsinit reads sb and calls loginit. initialize icache
in main.c and don't make it disk specific; the icache is shared.  This
doesn't matter since we have only one disk, but conceptually cleaner
and maybe helpful to students for mount lab.
2019-08-18 14:35:11 -04:00
Frans Kaashoek e398a9815c Wrap state of disk driver in a struct so that it is easier to support
several disks (e.g., in a mount lab).
2019-08-12 07:20:32 -04:00
Robert Morris 0c10cbe829 syscall lab nits 2019-08-02 11:55:26 -04:00
Frans Kaashoek 62ece4b09e Merge branch 'riscv-bcache' into riscv 2019-08-01 15:46:50 -04:00
Robert Morris fb8a0099d4 fences for starting 2019-08-01 14:59:20 -04:00
Robert Morris d600026c3f cut ramdisk 2019-07-30 16:06:00 -04:00
Frans Kaashoek 848d1906e8 Track in buf if disk "owns" buffer 2019-07-30 12:53:19 -04:00
Frans Kaashoek f37a3e3964 Make pin/unpin explicit 2019-07-30 08:54:43 -04:00
Frans Kaashoek f1bb53c690 The driver should free descriptors, not interrupt handler. This
avoids handler freeing descriptors before driver sees that the request
has completed.
2019-07-30 08:13:03 -04:00
Frans Kaashoek 5304310452 Remove B_DIRTY
Use refcnt to pin blocks into the cache
Replace flags/B_VALID with a boolean field valid
Use info[id].status to signal completion of disk interrupt
Pass a read/write flag to virtio_disk_rw
2019-07-29 17:33:16 -04:00
Robert Morris 47b9cfee49 separate out timer init code for clarity 2019-07-28 13:16:49 -04:00
Robert Morris 1ec50c5848 xxx 2019-07-28 07:43:22 -04:00
Robert Morris 6507da772d argptr no longer needed, since copyin checks 2019-07-28 06:29:37 -04:00
Robert Morris 629faafa36 cleaner UART register interface 2019-07-27 06:44:24 -04:00
Robert Morris a33f60fea3 console/uart tweaks 2019-07-27 05:47:19 -04:00
Robert Morris cf48b24c03 beautify console.c 2019-07-27 04:15:06 -04:00
Robert Morris 281d450a08 split printf into a separate file, to make console.c more like a driver 2019-07-27 03:49:03 -04:00
Robert Morris cc1a303d09 fetchint isn't used any more 2019-07-26 12:34:06 -04:00
Robert Morris f0987d82dc ??? 2019-07-26 11:09:54 -04:00
Robert Morris c714e3e35c machinevec -> timervec 2019-07-26 10:17:02 -04:00
Robert Morris fa2e2e3c81 uservec before userret in trampoline, to match book and kernelvec 2019-07-26 09:38:22 -04:00
Robert Morris 8d30e21b59 Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscv 2019-07-26 04:53:59 -04:00
Robert Morris ea95a6654c trampin -> uservec
trampout -> userret
2019-07-26 04:53:46 -04:00
Frans Kaashoek 47c9721d78 a few name changes in panic msg 2019-07-25 06:59:07 -04:00