Commit graph

73 commits

Author SHA1 Message Date
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 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
Frans Kaashoek 7894fcd217 Remove trailing white space with:
for f in *.{h,c}; do sed -i .sed 's/[[:blank:]]*$//' $f; done
(Thanks to Nicolás Wolovick)
2016-08-25 09:13:00 -04:00
Robert Morris a7c03bd914 p2v -> P2V 2016-08-24 13:40:06 -04:00
Robert Morris 9c65b32d9e nothing much 2016-08-11 15:41:53 -04:00
Robert Morris 858475e4df tiny clarifications to some gdt code. 2016-08-10 10:51:14 -04:00
Robert Morris 0a4a4230a3 shell nits
fix Regehr complaint
2016-08-08 13:06:38 -04:00
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