ilo-pona/xv6-65oo2
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14 commits

Author SHA1 Message Date
Frans Kaashoek 4cd4d194b8 Use simple linker script to force data segment to be page aligned 2022-08-23 10:54:40 -04:00
Frans Kaashoek cef1b57d4a Compile user binary to map text without W and data without X 
Use the flags in elf header to set vm permissions
Modify pgbug() so that usertests text segment is without W
Add test to check app cannot write text segment
 2022-08-15 19:02:19 -04:00
Frans Kaashoek 899cc02660 Experiment with being more precise setting permissions for user pages. 
Growing adds R|W pages (without X).  Exec() marks the stack only R|W.

Probably could setup permissions for text and data better if we call
ld with --no-omagic instead of -N.
 2022-08-12 13:22:10 -04:00
Robert Morris f4b3edf5ab comment nits 2022-08-10 06:00:40 -04:00
l0stman 19ff379661 exec() only accepts MAXARG arguments 
The terminating NULL string is already included (see sys_exec()).
 2021-08-31 14:26:43 -04:00
Robert Morris 6de0381d61 check for alignment just once 2021-08-10 07:12:41 -04:00
Robert Morris 5860dcd07d usertest for exec() out of memory recovery 
and fix a few exec() bugs
 2020-08-21 11:00:45 -04:00
Robert Morris f2ec6777bd fix a bug in the out-of-memory handling code in exec 2020-08-17 08:18:23 -04:00
Robert Morris 5494c91705 rename p->tf to p->trapframe, for consistency with p->context 2020-08-10 11:19:10 -04:00
Robert Morris 56583b1402 updated alarmtest 2019-10-03 15:02:19 -04:00
Robert Morris 9a817bd134 rationalize some vm function names 2019-07-24 15:28:37 -04:00
Frans Kaashoek b2e9c8eea5 Clear U bit for second stack page so that it functions as a guard page 2019-07-22 15:38:08 -04:00
Frans Kaashoek 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.
 2019-07-02 09:14:47 -04:00
Robert Morris 5753553213 separate source into kernel/ user/ mkfs/ 2019-06-11 09:57:14 -04:00
Renamed from exec.c (Browse further)