Frans Kaashoek
c9fa90f7e5
A tiny bit of clean up (e.g., move code searching cpu array from lapic.c into
...
mycpu() in proc.c.
2017-02-01 20:36:41 -05:00
Frans Kaashoek
2e2d14c235
use panic
2017-02-01 19:21:43 -05:00
Frans Kaashoek
7c00ce8110
shorten comment
2017-02-01 19:18:47 -05:00
Frans Kaashoek
ed396c068b
Eliminate code for gs trick to track per-cpu state. We rely on lapiccpunum()
...
to find a per-cpu id with which we locate a cpu's cpu struct.
2017-02-01 18:04:13 -05:00
Frans Kaashoek
fbb4c09444
Read curproc from cpu structure, but be careful because after a schedule event
...
myproc() points to a different thread.
myproc();
sched();
myproc(); // this proc maybe different than the one before sched
Thus, in a function that operates on one thread better to retrieve the
current process once at the start of the function.
2017-01-31 20:21:14 -05:00
Frans Kaashoek
abf847a083
Start of an experiment to remove the use of gs for cpu local variables.
2017-01-31 17:47:16 -05:00
Frans Kaashoek
59cdd6c63b
wolfgang keller
2017-01-30 20:24:13 -05:00
Frans Kaashoek
b4f2235e43
Fix spelling Gaoron.
2017-01-30 20:11:23 -05:00
Frans Kaashoek
d57d37eb87
Thanks to Wolfgang Keller <nubok@users.noreply.github.com>
2017-01-30 20:09:54 -05:00
Frans Kaashoek
c383612a7d
Thanks to Wolfgang Keller <nubok@users.noreply.github.com>
2017-01-30 20:07:42 -05:00
Antonio Gutierrez
1772853d39
Add support for qemu-system-x86_64 in 64bit hosts
...
As x86-64 is a superset of x86, we can use qemu-system-x86_64 to run
the OS image.
Signed-off-by: Antonio Gutierrez <chibby0ne@gmail.com>
2017-01-30 20:03:45 -05:00
Frans Kaashoek
906610efc9
Thanks to Jeehoon Kang <jeehoon.kang@sf.snu.ac.kr>
2017-01-30 20:01:33 -05:00
Peter Froehlich
8d1f99637a
Fix long-standing switchuvm() inconsistency.
...
switchuvm() is supposed to switch the TSS and page table to the
process p it is passed. Alas, instead of using p to access the
kstack field, it used the global proc. This worked fine because
(a) most uses of switchuvm() pass proc anyway and (b) because in
the schedule, where we call switchuvm with the newly scheduled
process, we actually set the global proc before the call. But I
think it's still a bug, even if it never broke a test case. :-)
2017-01-30 19:31:24 -05:00
Peter H. Froehlich
e916d668f7
Fix unsigned conversion bug.
...
Since readi() returns -1 for errors, checking with < against an unsigned
value is inadvisable. Checking with != works as intended however.
2017-01-30 19:31:24 -05:00
Frans Kaashoek
462930727f
Cody
2017-01-30 09:38:19 -05:00
Cody Cutler
ffe444926e
fix possible memory leak in deallocuvm
...
when a zero PDE is encountered while searching for present PTEs to free,
resume searching at first entry of the next page table instead of the
current entry of the next page table.
2016-09-26 12:34:08 -04:00
Icenowy Zheng
91fd3470b0
Fixed broken build on newer gold linker with NaCl support
...
On platforms with NaCl support, ld.gold -V will return a "elf_i386_nacl" in
addition to "elf_i386", which will make the build fail.
2016-09-26 08:25:17 -04:00
Frans Kaashoek
907f23a5bb
Add mikecat's argp test
2016-09-26 07:54:02 -04:00
MikeCAT
2a675089b1
fix memory region validation in argptr()
2016-09-26 07:52:17 -04:00
Frans Kaashoek
0df5f11bae
Typo (Thanks to Austin Liew)
2016-09-25 08:27:26 -04:00
Frans Kaashoek
7ddba7a636
Merge branch 'master' of g.csail.mit.edu:xv6-dev
2016-09-19 07:02:08 -04:00
Frans Kaashoek
89826f41bd
Check result of write (thans to Alexander Kapshuk <alexander.kapshuk@gmail)
2016-09-19 07:01:30 -04:00
Tej Chajed
fc1a5da295
Fix a small README typo
2016-09-16 09:11:23 -04:00
Frans Kaashoek
912575ad12
Remove left-over print statements
2016-09-15 19:16:30 -04:00
Robert Morris
d6dc5bcb2d
Merge branch 'master' of g.csail.mit.edu:xv6-dev
2016-09-15 12:56:17 -04:00
Robert Morris
aeaa308943
change allocproc() back to acquiring the ptable.lock.
...
fix bugs where caller incorrectly released lock on error return path.
2016-09-15 12:12:05 -04:00
Robert Morris
469aa8b9b3
xx
2016-09-15 12:01:52 -04:00
Frans Kaashoek
33188666da
Delete two left-over print statements
2016-09-14 21:13:09 -04:00
Frans Kaashoek
6cec0211d8
Update comment a bit.
2016-09-14 13:01:53 -04:00
Frans Kaashoek
da91a3a408
Add sleeplock.[ch] to listing
2016-09-14 08:43:57 -04:00
Frans Kaashoek
e85cb90cbf
one more BUSY
2016-09-13 14:51:44 -04:00
Frans Kaashoek
564a1cf0cb
sleeplock files
2016-09-11 21:01:24 -04:00
Frans Kaashoek
dec637bc59
Replace I_BUSY with sleep locks
2016-09-11 20:59:57 -04:00
Frans Kaashoek
2adb7c21dc
Move retry loop/sleep/wakeup in bio.c into sleeping locks
2016-09-11 20:17:22 -04:00
Frans Kaashoek
6670d3b5e0
Straight replacement of B_BUSY with a sleeping lock.
2016-09-11 17:24:04 -04:00
Frans Kaashoek
551c2f3576
Merge branch 'master' of g.csail.mit.edu:xv6-dev
2016-09-08 21:20:26 -04:00
Frans Kaashoek
1b8ccf9482
x
2016-09-08 21:20:17 -04:00
Robert Morris
34c2efc1d0
use asm() for lock release, not a C assignment
2016-09-08 14:45:20 -04:00
Robert Morris
d63ac118e8
this might fix the reported deadlock, though I can't reproduce it.
2016-09-08 14:22:38 -04:00
Frans Kaashoek
761ea5471f
Be a bit more explicit what kind of suggestions are are interested.
2016-09-08 13:09:09 -04:00
Frans Kaashoek
5bf3fbee00
Make runoff happy
2016-09-02 15:27:28 -04:00
Frans Kaashoek
b7fed77b7b
Fix a few lines that runoff is complaining about that they are too long
2016-09-02 14:59:00 -04:00
Frans Kaashoek
5f03799f84
ack xi
2016-09-02 08:43:33 -04:00
Frans Kaashoek
b8fd4cba13
Merge branch 'master' of g.csail.mit.edu:xv6-dev
2016-09-02 08:36:14 -04:00
Frans Kaashoek
ae15515d80
APIC IDs may not be consecutive and start from zero, so we cannot really use it
...
as a direct index into cpus. Record apicid in struct cpu and have cpunum() look
for it. Replace cpu->id with cpunum() everywhere, and replace cpu->id with cpu->apicid.
Thanks to Xi Wang.
2016-09-02 08:31:13 -04:00
Robert Morris
bc8221a59c
comment about sched() saving/restoring cpu->intena
2016-09-02 05:40:54 -04:00
Robert Morris
4b2152cc2d
curproc -> proc in a comment
2016-09-01 17:21:37 -04:00
Frans Kaashoek
37939f24c2
better comment
2016-08-26 08:46:13 -04:00
Frans Kaashoek
27ff70dc08
ack
2016-08-26 08:22:24 -04:00
Frans Kaashoek
aff0c8d5c7
set iomb to forbid i/o instructions from user space
...
add to test that they indeed trap in user space
thanks to pablogventura@gmail.com and nwolovick@gmail.com
2016-08-26 08:20:11 -04:00
