ac8c7834ef
Update linked branch of rmm and syscall
2021-05-04 08:14:43 -06:00
bdccce4a1b
Update rmm and syscall
2021-05-04 08:12:18 -06:00
3dc08c878f
Fix aarch64 switch_to function
2021-05-04 08:07:44 -06:00
b9a89f2160
More fixes for building aarch64
2021-05-03 22:07:40 -06:00
8f50785781
Fixes for building aarch64
2021-05-03 21:57:45 -06:00
c646cb76e5
Update rmm
2021-05-03 21:29:44 -06:00
8d61c79b23
Use RMM TableKind and fix x86_64 compilation
2021-05-03 21:15:46 -06:00
2aa4d8caf5
Merge remote-tracking branch 'origin/aarch64-rebase' into riscv64
2021-05-03 20:52:59 -06:00
17c261553b
Fixes for building x86_64
2021-05-03 20:43:18 -06:00
dfdb562e6b
Use RMM PhysicalAddress
2021-05-03 20:33:31 -06:00
9f0532b1d5
Remove unused flags from old EntryFlags
2021-05-03 17:29:55 -06:00
b9448274fc
Switch to using RMM PageFlags
2021-05-03 17:28:08 -06:00
826180659c
Update rmm and syscall
2021-05-03 17:16:59 -06:00
ff8cb8abe8
Enforce must_use
2021-05-03 15:02:32 -06:00
dd0616cc8f
Use RMM for TLB flushing
2021-05-03 12:42:16 -06:00
29460e0bff
Use RMM for some arch-specific paging functions
2021-05-03 12:14:49 -06:00
ad39568fe9
Fix unwrapping stack when there are kernel addresses (and there always are)
2021-05-02 19:53:31 -06:00
af17eeec3a
Give schemes a dangling address for empty slices.
...
This allows schemes to avoid checking the length against zero before
constructing a slice from pointer+len that the kernel gave.
Additionally, the address is now non-canonical on x86, meaning that
userspace will fail instead of continuing with UB, if they would ever
forget to check the length.
2021-04-29 07:40:50 -06:00
73c77d756d
Print context name in exception
2021-04-28 21:15:21 -06:00
37e6951501
Print CPU and PID when exception occurs
2021-04-28 20:59:52 -06:00
d331f72f2a
Use UTF-8 for all paths
2021-04-28 20:06:07 -06:00
8fcd375bd9
Switch Context::grants to RwLock
2021-04-28 20:04:27 -06:00
41bea0086f
Switch Context::actions to RwLock
2021-04-28 20:03:29 -06:00
83dea72a50
Switch Context::files to RwLock
2021-04-28 20:03:25 -06:00
c7aba8fdfd
Switch Context::cwd to using RwLock
2021-04-28 20:03:18 -06:00
a9bee0bbdc
Require UTF-8 for context name
2021-04-28 20:03:12 -06:00
b26c3e0ae9
Make context name a RwLock
2021-04-28 20:03:05 -06:00
f90033e0e1
Use PHYS_OFFSET instead of KERNEL_OFFSET to refer to the physmap
2021-04-13 20:38:54 -06:00
afca4da382
Update syscall
2021-04-13 19:34:38 -06:00
959a917ba2
Update RMM
2021-04-13 19:34:27 -06:00
5fe8dcf6af
Merge branch 'chown-perms' into 'master'
...
UserScheme: permission check EUID and EGID before proceeding with chown
See merge request redox-os/kernel!176
2021-03-21 13:02:41 +00:00
ee6493d02e
UserScheme: permission check EUID and EGID before proceeding with chown
...
Fixes redox#1327.
2021-03-20 20:42:02 -05:00
47048102ef
Fix typo in ContextList
2021-03-02 19:57:44 -07:00
b8e47f6b8f
Merge branch 'fix-invalid-grant-state' into 'master'
...
Fix "Grant should not exist" errors.
See merge request redox-os/kernel!174
2021-03-02 13:30:03 +00:00
031496ff0d
Fix "Grant should not exist" errors.
...
This is done by making sure that when empty() is called on a context,
the grants Arc will be replaced with a new unused Arc, hence
decrementing the refcount. Previously this was only done when the
context was actually reaped, but since there is no guarantee as far as I
am aware about when this must happen, the grants could be completely
leaked, leading to the error.
2021-02-27 15:36:12 +01:00
f873fc7e1a
Merge branch '4lDO2/kernel-use_gs_for_tls'
2021-02-23 09:21:00 -07:00
ba330ffc9a
Merge branch 'fix-utf8-userspace-ub' into 'master'
...
Give schemes a dangling address for empty slices, fixing UB in userspace
See merge request redox-os/kernel!172
2021-02-23 16:17:30 +00:00
ad58ca1de6
Give schemes a dangling address for empty slices.
...
This allows schemes to avoid checking the length against zero before
constructing a slice from pointer+len that the kernel gave.
Additionally, the address is now non-canonical on x86, meaning that
userspace will fail instead of continuing with UB, if they would ever
forget to check the length.
2021-02-20 17:20:30 +01:00
bdc925d275
Use GS for TLS!
...
Previously, the kernel used the regular FS segment for Thread-Local
Storage. The problem however, is that userspace code also uses FS for
TLS, meaning that the kernel would have to switch the FS segment between
user and kernel, _upon every syscall_. This is obviously suboptimal for
performance (especially with fast syscalls such as futex, nanosleep, or
yield).
I had to search LLVM for hours, just to find out that the insertion of
the memory load with FS was actually done in the linker, so I added a
flag for that.
I haven't done any proper benchmarking, but the boot process seems to
have gotten much faster!
2021-02-17 14:44:45 +01:00
a283160c14
Merge branch 'sysretq-fix2' into 'master'
...
FIX: Forbid lower-half noncanonical addresses too.
See merge request redox-os/kernel!170
2021-02-17 13:32:26 +00:00
1988583e23
Forbid lower-half noncanonical addresses too.
2021-02-17 13:00:07 +01:00
98af1405e6
Merge branch 'sysretq-fix' into 'master'
...
Fix mistyped instructions in sysretq
See merge request redox-os/kernel!169
2021-02-15 19:12:05 +00:00
a4b3af34a5
Use correct jump instruction.
2021-02-15 20:05:00 +01:00
c19581282d
Use the correct add instruction when popping CS.
2021-02-15 20:02:35 +01:00
2a9b7a0fc8
Merge branch 'sysretq' into 'master'
...
Use faster sysretq when returning from system calls
See merge request redox-os/kernel!168
2021-02-15 18:59:19 +00:00
8eb58891aa
Simplify sysretq code.
2021-02-15 19:53:49 +01:00
5b2df9f504
Document why usermode() can omit rcx check.
2021-02-15 19:53:49 +01:00
ff33090fd0
Check whether RCX is canonical in sysretq.
2021-02-15 19:53:41 +01:00
a183953ee8
Motivate usage of the IST without SWAPGS involved.
2021-02-15 19:53:37 +01:00
a3583a10ce
Only swapgs when leaving/entering userspace code.
2021-02-15 19:53:37 +01:00
Jeremy Soller