Frans Kaashoek
74c77da6f8
Nice layout for a printout of the code
2014-08-29 17:06:49 -04:00
Stephen Tu
ff2783442e
Correct a security bug in copyuvm()
...
copyuvm() should not allow new copied pages to inherit more
permissions than the original pages.
2013-03-04 16:16:54 -05:00
Robert Morris
792d83cad1
nits
2012-08-28 14:11:23 -04:00
Frans Kaashoek
3fb7eceea7
Runoff still complaints these lines are too long, but it is now ok on printout
2012-08-22 21:24:13 -04:00
Frans Kaashoek
4ce832ddd2
Remove unused argument to setupkvm (thanks to Peter Froehlich)
2012-08-22 20:19:37 -04:00
Robert Morris
c092540e39
eliminate enter_alloc -- use kalloc for everything
2011-09-13 13:14:52 -04:00
Robert Morris
7e7cb106d0
more regular kmap[] and description
2011-09-13 12:28:45 -04:00
Austin Clements
dd4438b4fe
Nuke data.S, since we do have a custom linker script.
2011-09-02 14:51:55 -04:00
Austin Clements
6f3ca059f2
Oops, dropped a paren
2011-09-02 14:37:42 -04:00
Austin Clements
2eb214c9db
clear_pte_u -> clearpteu
2011-09-02 14:37:04 -04:00
Austin Clements
91aa0f3296
Move copy_pte_u; fits vm.c in one less column and aligns proc.h
2011-09-02 14:35:58 -04:00
Austin Clements
9e4272c14e
Cleanup comments and fit setupkvm on same page as kmap, which aligns lots of other things
2011-09-02 14:34:29 -04:00
Austin Clements
14835ec987
Style
2011-09-02 14:28:44 -04:00
Austin Clements
cf7b670293
Make mappages fit on the page
2011-09-02 14:11:16 -04:00
Austin Clements
052e18485d
Skip missing page directories in deallocuvm
...
Previously, deallocuvm scanned from 0 to KERNBASE in one page
increments, which had a noticable effect on boot time. Now it skips
over missing page directories.
2011-09-01 21:29:09 -04:00
Robert Morris
371ab7fa96
inaccessible page under the user stack page, to help exec deal w/ too-large args
2011-09-01 13:25:34 -04:00
Robert Morris
62e3b8a92c
Merge branch 'master' of git+ssh://amsterdam.csail.mit.edu/home/am0/6.828/xv6
...
Conflicts:
vm.c
2011-09-01 12:03:49 -04:00
Robert Morris
5a23692444
fix usertests to correctly test what happens when you call
...
exec() with arguments that don't fit on a single page.
2011-09-01 12:02:49 -04:00
Frans Kaashoek
e25b74ca80
Fix layout issues for printed version
2011-09-01 10:25:20 -04:00
Austin Clements
a7061b4f97
Style nits; indentation and tabs
2011-08-29 16:12:01 -04:00
Frans Kaashoek
6f2327580f
Eliminate USERTOP; no use for it.
2011-08-24 10:24:40 -04:00
Frans Kaashoek
5f069dcf2f
Switch back to #define for PHYSTOP. Using the E820 to retrieve the memory map is too complicated (must be done in 16-bit real-mode, probably enlarged bootblock beyond 512 bytes, and a #define requires less explanation).
2011-08-16 20:23:17 -04:00
Frans Kaashoek
c3dcf47966
Clean up memlayout.h
...
Get rid of last instances of linear address and "la"
Get ready for detecting physical memory dynamically
2011-08-16 15:47:22 -04:00
Frans Kaashoek
d9818bdd7d
Make Austin happier
...
2011
2011-08-15 20:21:14 -04:00
Frans Kaashoek
a4b213cf49
Avoid "boot" in xv6
2011-08-15 20:11:13 -04:00
Frans Kaashoek
bd71a45046
Make AP processors boot using bootpgdir
...
Remove device mapping from bootpgdir
Remove unnecessary vmenable
Set CPUS back to 2 in Makefile
Passes all usertests
2011-08-11 12:25:10 -04:00
Frans Kaashoek
8a9933a200
Tiny bit of cleanup
2011-08-09 21:56:43 -04:00
Frans Kaashoek
5460667c9c
x
2011-08-09 21:49:13 -04:00
Frans Kaashoek
66ba8079c7
Use static page table for boot, mapping first 4Mbyte; no more segment trick
...
Allocate proper kernel page table immediately in main using boot allocator
Remove pginit
Simplify address space layout a tiny bit
More to come (e.g., superpages to simplify static table)
2011-08-09 21:37:35 -04:00
Frans Kaashoek
6479766334
Adjust sbrk test for large user address spaces
...
All tests pass
2011-08-07 23:03:48 -04:00
Frans Kaashoek
547c28fc1e
Don't map IO space in the user part of the address space
...
Passes all tests now (but need to update usertests to allow for more than 640k)
2011-07-31 21:27:02 -04:00
Frans Kaashoek
9aa0337dc1
Map kernel high
...
Very important to give qemu memory through PHYSTOP :(
2011-07-29 07:31:27 -04:00
Russ Cox
cf4b1ad90b
xv6: formatting, cleanup, rev5 (take 2)
2011-02-19 21:17:55 -05:00
Russ Cox
417c37115e
more trivial cleanup
2011-01-11 13:51:40 -05:00
Russ Cox
1a81e38b17
make new code like old code
...
Variable declarations at top of function,
separate from initialization.
Use == 0 instead of ! for checking pointers.
Consistent spacing around {, *, casts.
Declare 0-parameter functions as (void) not ().
Integer valued functions return -1 on failure, 0 on success.
2011-01-11 13:01:13 -05:00
Robert Morris
4655d42e3b
copyout() copies data to a va in a pagetable, for exec() &c
...
usertest that passes too many arguments, break exec
2010-09-27 16:14:33 -04:00
Robert Morris
a9183883b8
map kernel instructions r/o
2010-09-20 06:00:22 -04:00
Robert Morris
faad047ab2
change some comments, maybe more informative
...
delete most comments from bootother.S (since copy of bootasm.S)
ksegment() -> seginit()
move more stuff from main() to mainc()
2010-09-13 15:34:44 -04:00
Austin Clements
79cd8b3eed
Simplify allocuvm/deallocuvm to operate in a contiguous memory model. This makes their interface match up better with proc->sz and also simplifies the callers (it even gets the main body of exec on one page).
2010-09-02 18:28:36 -04:00
Austin Clements
9a4670a138
Comment inituvm and loaduvm
2010-09-02 16:39:55 -04:00
Austin Clements
93a1e4cb07
Fix comment capitalization
2010-09-02 16:36:38 -04:00
Austin Clements
f25a3f9a41
Rearrange vm.c so it's in logical order and prints nicely. Shorten a few functions in uninteresting ways to make them fit.
2010-09-02 16:23:15 -04:00
Austin Clements
f53e6110be
Simplify inituvm and userinit by assuming initcode fits on a page
2010-09-02 15:42:25 -04:00
Austin Clements
b3cfd7fc37
Simplify freevm using deallocuvm
2010-09-02 15:18:19 -04:00
Austin Clements
d3ecf3eb44
Slight simplification of copyuvm. We could simplify other things now that processes are contiguous, but we'd have to think harder about the error paths.
2010-09-01 17:14:58 -04:00
Austin Clements
b0751a3e9b
Space police
2010-09-01 00:41:25 -04:00
Austin Clements
5efca9054f
Tab police
2010-09-01 00:32:27 -04:00
Austin Clements
ba04b3e70e
Fix similar leak in copyuvm
2010-09-01 00:27:12 -04:00
Austin Clements
dd645ef119
Cleanup if allocuvm fails to alloc. Add a test.
2010-08-31 21:49:49 -04:00
Robert Morris
8d774afb2d
no more pminit, or ELF header at 0x10000
...
kinit() knows about end and PHYSTOP
map all of kernel read/write (rather than r/o instructions)
thanks, austin
2010-08-31 15:39:25 -04:00
