ff2783442e
Correct a security bug in copyuvm()
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copyuvm() should not allow new copied pages to inherit more
permissions than the original pages.
2013-03-04 16:16:54 -05:00
792d83cad1
nits
2012-08-28 14:11:23 -04:00
3fb7eceea7
Runoff still complaints these lines are too long, but it is now ok on printout
2012-08-22 21:24:13 -04:00
4ce832ddd2
Remove unused argument to setupkvm (thanks to Peter Froehlich)
2012-08-22 20:19:37 -04:00
c092540e39
eliminate enter_alloc -- use kalloc for everything
2011-09-13 13:14:52 -04:00
7e7cb106d0
more regular kmap[] and description
2011-09-13 12:28:45 -04:00
dd4438b4fe
Nuke data.S, since we do have a custom linker script.
2011-09-02 14:51:55 -04:00
6f3ca059f2
Oops, dropped a paren
2011-09-02 14:37:42 -04:00
2eb214c9db
clear_pte_u -> clearpteu
2011-09-02 14:37:04 -04:00
91aa0f3296
Move copy_pte_u; fits vm.c in one less column and aligns proc.h
2011-09-02 14:35:58 -04:00
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
14835ec987
Style
2011-09-02 14:28:44 -04:00
cf7b670293
Make mappages fit on the page
2011-09-02 14:11:16 -04:00
052e18485d
Skip missing page directories in deallocuvm
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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
371ab7fa96
inaccessible page under the user stack page, to help exec deal w/ too-large args
2011-09-01 13:25:34 -04:00
62e3b8a92c
Merge branch 'master' of git+ssh://amsterdam.csail.mit.edu/home/am0/6.828/xv6
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Conflicts:
vm.c
2011-09-01 12:03:49 -04:00
5a23692444
fix usertests to correctly test what happens when you call
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exec() with arguments that don't fit on a single page.
2011-09-01 12:02:49 -04:00
e25b74ca80
Fix layout issues for printed version
2011-09-01 10:25:20 -04:00
a7061b4f97
Style nits; indentation and tabs
2011-08-29 16:12:01 -04:00
6f2327580f
Eliminate USERTOP; no use for it.
2011-08-24 10:24:40 -04:00
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
c3dcf47966
Clean up memlayout.h
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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
d9818bdd7d
Make Austin happier
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2011
2011-08-15 20:21:14 -04:00
a4b213cf49
Avoid "boot" in xv6
2011-08-15 20:11:13 -04:00
bd71a45046
Make AP processors boot using bootpgdir
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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
8a9933a200
Tiny bit of cleanup
2011-08-09 21:56:43 -04:00
5460667c9c
x
2011-08-09 21:49:13 -04:00
66ba8079c7
Use static page table for boot, mapping first 4Mbyte; no more segment trick
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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
6479766334
Adjust sbrk test for large user address spaces
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All tests pass
2011-08-07 23:03:48 -04:00
547c28fc1e
Don't map IO space in the user part of the address space
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Passes all tests now (but need to update usertests to allow for more than 640k)
2011-07-31 21:27:02 -04:00
9aa0337dc1
Map kernel high
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Very important to give qemu memory through PHYSTOP :(
2011-07-29 07:31:27 -04:00
cf4b1ad90b
xv6: formatting, cleanup, rev5 (take 2)
2011-02-19 21:17:55 -05:00
417c37115e
more trivial cleanup
2011-01-11 13:51:40 -05:00
1a81e38b17
make new code like old code
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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
4655d42e3b
copyout() copies data to a va in a pagetable, for exec() &c
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usertest that passes too many arguments, break exec
2010-09-27 16:14:33 -04:00
a9183883b8
map kernel instructions r/o
2010-09-20 06:00:22 -04:00
faad047ab2
change some comments, maybe more informative
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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
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
9a4670a138
Comment inituvm and loaduvm
2010-09-02 16:39:55 -04:00
93a1e4cb07
Fix comment capitalization
2010-09-02 16:36:38 -04:00
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
f53e6110be
Simplify inituvm and userinit by assuming initcode fits on a page
2010-09-02 15:42:25 -04:00
b3cfd7fc37
Simplify freevm using deallocuvm
2010-09-02 15:18:19 -04:00
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
b0751a3e9b
Space police
2010-09-01 00:41:25 -04:00
5efca9054f
Tab police
2010-09-01 00:32:27 -04:00
ba04b3e70e
Fix similar leak in copyuvm
2010-09-01 00:27:12 -04:00
dd645ef119
Cleanup if allocuvm fails to alloc. Add a test.
2010-08-31 21:49:49 -04:00
8d774afb2d
no more pminit, or ELF header at 0x10000
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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
7d7dc9331b
kalloc/kfree now only a page at a time
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do not keep sorted contiguous free list
2010-08-31 12:54:47 -04:00
Stephen Tu
Robert Morris
Frans Kaashoek
Austin Clements
Frans Kaashoek
Frans Kaashoek
Frans Kaashoek
Frans Kaashoek
Frans Kaashoek
Russ Cox
Robert Morris