sortix-mirror

2,108 Commits 2 Branches 0 Tags 24 MiB

Author	SHA1	Message	Date
Jonas 'Sortie' Termansen	2e3d7c45af	Add paging no-execute and write protection support. Enable the NX bit on x86_64 and set if not PROT_EXEC and enable the write protection mode (CR0.WP) that disables the default behavior where the kernel is able to write to read-only memory. Fix kernel broken assumptions it can access read-only memory and take care to never set PROT_KWRITE on user-space pages unless PROT_WRITE is also set, otherwise user-space will be able to write to read-only memory. This achieves X^W in the whole system except for the core kernel itself as it is currently don't know the purpose of pages when identity mapping the first 4 MiB.	2016-01-25 17:39:57 +01:00
Jonas 'Sortie' Termansen	a099f82890	Update kernel memory management to current coding conventions.	2014-03-01 14:37:40 +01:00
Jonas 'Sortie' Termansen	98a87fa1e5	Rename Sortix kernel directory to kernel.	2014-03-01 14:37:39 +01:00

Author

SHA1

Message

Date

Jonas 'Sortie' Termansen

2e3d7c45af

Add paging no-execute and write protection support.

Enable the NX bit on x86_64 and set if not PROT_EXEC and enable the write
protection mode (CR0.WP) that disables the default behavior where the kernel
is able to write to read-only memory. Fix kernel broken assumptions it can
access read-only memory and take care to never set PROT_KWRITE on user-space
pages unless PROT_WRITE is also set, otherwise user-space will be able to
write to read-only memory.

This achieves X^W in the whole system except for the core kernel itself as
it is currently don't know the purpose of pages when identity mapping the
first 4 MiB.

2016-01-25 17:39:57 +01:00

Jonas 'Sortie' Termansen

a099f82890

Update kernel memory management to current coding conventions.

2014-03-01 14:37:40 +01:00

Jonas 'Sortie' Termansen

98a87fa1e5

Rename Sortix kernel directory to kernel.

2014-03-01 14:37:39 +01:00

Renamed from sortix/x86-family/memorymanagement.h (Browse further)

3 Commits