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  • 6f3a441c10 Remove a few no longer relevant files Frans Kaashoek 2019-07-24 08:59:47 -0400
  • dfc2cf9123 add rtm's cow lab Frans Kaashoek 2019-07-24 08:55:41 -0400
  • a41365faa3 Add relevant docs to repo Frans Kaashoek 2019-07-24 08:38:41 -0400
  • 0387e2156f Add a few sbrktest for lazy allocatioin lab Frans Kaashoek 2019-07-24 08:37:26 -0400
  • 936afc6e1a mstart -> start Robert Morris 2019-07-23 14:31:12 -0400
  • 54178ad94d simplify kernel mapping calls Robert Morris 2019-07-23 12:17:17 -0400
  • 55bc96d419 a few core -> CPU get rid of PDF generating support Robert Morris 2019-07-23 11:14:10 -0400
  • b8a31c494c one more TRAMPOLINE Frans Kaashoek 2019-07-23 07:30:23 -0400
  • 6c78af4a57 fix mapkstack Frans Kaashoek 2019-07-22 20:58:15 -0400
  • 62091abae9 Test whether writing below stack fails Frans Kaashoek 2019-07-22 18:08:52 -0400
  • b2e9c8eea5 Clear U bit for second stack page so that it functions as a guard page Frans Kaashoek 2019-07-22 15:38:08 -0400
  • 38b430687c nit Robert Morris 2019-07-22 15:04:07 -0400
  • 6b379e4707 -MD and TRAPFRAME Robert Morris 2019-07-22 14:54:40 -0400
  • 5eab649255 Allocate 2 pages per proc, with the top one unmapped. The page below the last proc is unmapped by default (because the kernel doesn't map anything right below the kernel stacks). Frans Kaashoek 2019-07-22 14:30:45 -0400
  • c5d48db045 Merge branch 'riscv-kstack' into riscv Frans Kaashoek 2019-07-22 13:32:33 -0400
  • 328204d9cc not much Robert Morris 2019-07-20 18:51:31 -0400
  • 06e49a58dc pi for pipe, rather than p, to avoid confusion with proc's p->lock Robert Morris 2019-07-20 17:07:20 -0400
  • 3333665ab6 not much Robert Morris 2019-07-20 10:17:26 -0400
  • 2418ac380c it's not clear that the release will always enable interrupts Robert Morris 2019-07-19 13:27:48 -0400
  • 06109901c9 x Frans Kaashoek 2019-07-19 11:27:02 -0400
  • dbd729b32d with per-proc locks, we don't need the intr_on() inside the loop. Robert Morris 2019-07-19 10:20:02 -0400
  • 32168df609 no need to save/restore 14 Robert Morris 2019-07-19 09:02:15 -0400
  • 9156632701 One way of supporting a guard page below kstack: allocate kstacks in procinit() and map them high up (below TRAMPOLNE) with an empty mapping below each stack. Never free a kernel stack. Frans Kaashoek 2019-07-19 08:38:51 -0400
  • b924e44f06 Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscv Frans Kaashoek 2019-07-17 05:53:47 -0400
  • ce53416f49 Delete x86 comment Frans Kaashoek 2019-07-17 05:53:34 -0400
  • ebc3937209 conservatively call sfence.vma before every satp load. Robert Morris 2019-07-16 17:02:21 -0400
  • 6bbc2b2245 cosmetic changes Robert Morris 2019-07-11 10:38:56 -0400
  • 7797a38423 another test, to help with locking exercises Robert Morris 2019-07-11 05:41:59 -0400
  • 4bc900e78b nits Robert Morris 2019-07-10 14:54:34 -0400
  • e6addf25bb feeble attempt at build instructions Robert Morris 2019-07-10 10:30:33 -0400
  • 061e3be6f8 more comment cleanup Robert Morris 2019-07-10 10:13:08 -0400
  • c0266a877a document which proc fields are protected by p->lock Robert Morris 2019-07-10 09:28:00 -0400
  • 5eb1685700 have kill() lock before looking at p->pid document wait()'s use of np->parent w/o holding lock. Robert Morris 2019-07-10 09:24:50 -0400
  • 9981bb2270 tweak some comments. Robert Morris 2019-07-10 08:57:51 -0400
  • 2f22a3ed6a Merge branch 'riscv-proc' into riscv Frans Kaashoek 2019-07-08 15:50:06 -0400
  • 60ed537427 Merge branch 'riscv-proc' of g.csail.mit.edu:xv6-dev into riscv-proc Robert Morris 2019-07-08 11:11:29 -0400
  • 9d34838b4f holding p->lock all the way through state=RUNNABLE means we don't need EMBRYO Robert Morris 2019-07-08 11:11:00 -0400
  • adcc612901 Update runoff list for producing xv6.pdf Frans Kaashoek 2019-07-08 08:50:55 -0400
  • db72f3108f eliminate ptable. ptable.lock -> pid_lock. Robert Morris 2019-07-07 15:20:13 -0400
  • 4ce3a5fa21 nits Robert Morris 2019-07-07 14:57:16 -0400
  • c4f6a241cd avoid a double-lock of initproc->lock if child of init is reparenting Robert Morris 2019-07-07 07:03:28 -0400
  • 7114bf43ed Merge branch 'riscv-proc' of g.csail.mit.edu:xv6-dev into riscv-proc Robert Morris 2019-07-07 06:39:58 -0400
  • 62313be582 another fork test Robert Morris 2019-07-07 06:39:31 -0400
  • dabbc348bc Maybe fix two races identified by rtm (thx!): Frans Kaashoek 2019-07-06 16:38:41 -0400
  • 75b0c6fc91 back-port fork/exit/exit tests to xv6-riscv Robert Morris 2019-07-05 12:33:26 -0400
  • be88befed7 two exit/exit tests Robert Morris 2019-07-05 11:44:51 -0400
  • fab5e7c1de Make size in stat.h be a uint64 Supporting print long using %l (a bit of cheat) Modify ls to print size using %l We should probably update size in inode too. Frans Kaashoek 2019-07-04 08:54:23 -0400
  • 6bfb078b14 x Frans Kaashoek 2019-07-04 08:54:16 -0400
  • 47e69250d0 Simplify wakeup1 Frans Kaashoek 2019-07-03 15:38:30 -0400
  • cee830af24 Apply some corresponding bug fixes from wq branch here Frans Kaashoek 2019-07-03 15:18:55 -0400
  • ccf299850b Remove some debugging code Frans Kaashoek 2019-07-02 20:52:30 -0400
  • 26f306113a Fix a lost wakeup bug: the disk driver's wakeup() can run after the reading process acquired p->lock and released virtio lock in sleep(), but before the process had set p->status to SLEEPING, because the wakeup tested p->status without holding p's lock. Thus, wakeup can complete without seeing any process SLEEPING and then p sets p->status to SLEEPING. Frans Kaashoek 2019-07-02 19:29:14 -0400
  • 1e4d7065d6 Merge branch 'riscv' into riscv-proc Frans Kaashoek 2019-07-02 14:19:31 -0400
  • 84c759fc02 x Frans Kaashoek 2019-07-02 14:09:38 -0400
  • 37ac6f8f4f Don't start processes at the end of the proc table Frans Kaashoek 2019-07-02 13:55:52 -0400
  • da51735980 Avoid two cores selecting the same process to run Frans Kaashoek 2019-07-02 13:40:33 -0400
  • f59c1bf1d8 try to continue from walk() failing to allocate a page-table page Robert Morris 2019-07-02 11:45:06 -0400
  • b27f275014 avoid allocproc() returning a struct proc with non-zero p->sz Robert Morris 2019-07-02 11:17:50 -0400
  • 1540c8b15a COW tests Robert Morris 2019-07-02 11:04:35 -0400
  • 67702cf706 Checkpoint switching to per-process locks, in attempt clarify xv6's locking plan, which is a difficult to understand because ptable lock protects many invariants. This implementation has a bug: once in a while xv6 unlocks a proc lock that is locked by another core. Frans Kaashoek 2019-07-02 09:14:47 -0400
  • 40f1041a0a don't enable interrupts until done with sstatus, scause, &c Robert Morris 2019-07-02 05:20:11 -0400
  • 535ac52efa oops, don't hold mycpu() result across intr_off() Robert Morris 2019-07-01 14:15:18 -0400
  • abfe9999f4 have fork() fail, not panic, if not enough phys mem Robert Morris 2019-07-01 17:46:06 -0400
  • 18e76a6c47 sbrk() returns a pointer, so it should be 64 bits Robert Morris 2019-07-01 17:01:50 -0400
  • 9b99f00743 oops, don't hold mycpu() result across intr_off() Robert Morris 2019-07-01 14:15:18 -0400
  • 0498bfd159 timer interrupt in the kernel -> yield Robert Morris 2019-07-01 13:46:11 -0400
  • c34bd3d167 Checkpoint some progress compiling xv6.pdf Frans Kaashoek 2019-07-01 13:02:24 -0400
  • 2c0338fe42 x Frans Kaashoek 2019-07-01 08:28:14 -0400
  • af6c35e14b Introduce alloc3_desc and UsedArea to make code easier to read Frans Kaashoek 2019-07-01 08:20:35 -0400
  • a8305b7318 FD_DEVICE Robert Morris 2019-06-13 10:29:27 -0400
  • 46744c4a13 for spinlocks, use gcc intrinsics, but say what they compile to Robert Morris 2019-06-13 10:00:50 -0400
  • ca39672a30 clean up virtio code Robert Morris 2019-06-13 09:40:17 -0400
  • 4adf016925 eliminate ramdisk Robert Morris 2019-06-13 06:57:38 -0400
  • de9d72c908 virtio disk driver Robert Morris 2019-06-13 06:49:02 -0400
  • 5753553213 separate source into kernel/ user/ mkfs/ Robert Morris 2019-06-11 09:57:14 -0400
  • 91ba81110a gdb backtraces: -ggdb, -fno-omit-frame-pointer, BSIZE=1024 Robert Morris 2019-06-06 13:54:03 -0400
  • 8607051b5f fix a create()/unlink() deadlock Robert Morris 2019-06-06 10:38:11 -0400
  • 31ef85f552 add plic.c Robert Morris 2019-06-06 05:19:59 -0400
  • b05bcce939 add kernelvec Robert Morris 2019-06-06 05:19:35 -0400
  • dff7ab3f8f make -O work with asm volatile(...) Robert Morris 2019-06-05 15:05:56 -0400
  • 5684556c19 clean up -Wall Robert Morris 2019-06-05 14:31:13 -0400
  • 5eb1cb4972 push_off() and pop_off() in myproc() Robert Morris 2019-06-05 14:14:57 -0400
  • 3113643768 spinlocks using gcc intrinsics push_off() / pop_off() set up per-hart plic stuff so all harts get device interrupts Robert Morris 2019-06-05 14:05:46 -0400
  • f1a727b971 start at support for multiple CPUs Robert Morris 2019-06-05 11:42:03 -0400
  • ec3d3a1fce yield if timer interrupt all user tests passed Robert Morris 2019-06-04 14:25:48 -0400
  • a82772594e timer interrupts -> supervisor software interrupt Robert Morris 2019-06-04 14:20:37 -0400
  • cff3ce6e04 more sbrk fixes Robert Morris 2019-06-04 11:31:50 -0400
  • 0e131b2263 fix a problem with end. make uartputc() wait until h/w is ready. Robert Morris 2019-06-04 10:43:45 -0400
  • b78894f34e check that arguments aren't more than a page in exec() Robert Morris 2019-06-04 06:51:01 -0400
  • 0f684b9150 fix exec argc Robert Morris 2019-06-04 06:45:09 -0400
  • 8baac76050 support read() and write() bigger than one page Robert Morris 2019-06-04 05:57:47 -0400
  • cefe223bf5 console input and sbrk Robert Morris 2019-06-03 17:59:17 -0400
  • efecbee7c0 xx Robert Morris 2019-06-03 17:49:27 -0400
  • 6eae1be755 push/pop all registers when handling interrupt from kernel Robert Morris 2019-06-03 15:23:12 -0400
  • e630e0743b xx Robert Morris 2019-06-03 14:16:51 -0400
  • a9c1a6f742 takes one uart input interrupt, then panics Robert Morris 2019-06-03 14:13:07 -0400
  • 50cbc75102 first shell prints $ prompt, though no console input yet Robert Morris 2019-06-01 05:33:38 -0400
  • 7fd1f1eb0a exec compiles but argstr() doesn't work yet Robert Morris 2019-05-31 12:43:20 -0400
  • 5d34fa2a48 -initrd fs.img, ramdisk.c, file system Robert Morris 2019-05-31 11:45:42 -0400
  • 2ec1959fd1 fork/wait/exit work Robert Morris 2019-05-31 09:45:59 -0400