RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 18:27:39 +00:00
Code Issues Activity Actions

Kernel: Disable x86 RDTSC instruction in userspace

Browse source 
It's still possible to read the TSC via the read_tsc() syscall, but we
will now clear some of the bottom bits for unprivileged users.
This commit is contained in:
Andreas Kling 2020-01-01 18:18:02 +01:00
parent dfd759f75a
commit 38f93ef13b
6 changed files with 25 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

1
Base/usr/share/man/man1/crash.md
View file

@ -34,6 +34,7 @@ kinds of crashes.
* `-X`: Attempt to execute non-executable memory. (Not mapped with PROT\_EXEC.)
* `-U`: Attempt to trigger an x86 User Mode Instruction Prevention fault.
* `-I`: Use an x86 I/O instruction in userspace.
* `-c`: Read the x86 TSC (Time Stamp Counter) directly.
## Examples