Andreas Kling 9eef39d68a Kernel: Start implementing x86 SMAP support ... Supervisor Mode Access Prevention (SMAP) is an x86 CPU feature that prevents the kernel from accessing userspace memory. With SMAP enabled, trying to read/write a userspace memory address while in the kernel will now generate a page fault. Since it's sometimes necessary to read/write userspace memory, there are two new instructions that quickly switch the protection on/off: STAC (disables protection) and CLAC (enables protection.) These are exposed in kernel code via the stac() and clac() helpers. There's also a SmapDisabler RAII object that can be used to ensure that you don't forget to re-enable protection before returning to userspace code. THis patch also adds copy_to_user(), copy_from_user() and memset_user() which are the "correct" way of doing things. These functions allow us to briefly disable protection for a specific purpose, and then turn it back on immediately after it's done. Going forward all kernel code should be moved to using these and all uses of SmapDisabler are to be considered FIXME's. Note that we're not realizing the full potential of this feature since I've used SmapDisabler quite liberally in this initial bring-up patch.		2020-01-05 18:14:51 +01:00
..
ACPI	Kernel: Create a basic SMBIOS Decoder	2020-01-02 00:50:09 +01:00
Arch/i386	Kernel: Start implementing x86 SMAP support	2020-01-05 18:14:51 +01:00
Devices	Kernel: Fix IRQ define in PS2MouseDevice	2020-01-05 10:45:30 +01:00
FileSystem	Kernel: Start implementing x86 SMAP support	2020-01-05 18:14:51 +01:00
Heap	Kernel: Demangle userspace ELF symbols in backtraces	2019-11-27 14:06:24 +01:00
Net	Kernel: Make LocalSocket pre-bind GID be gid_t (#1012)	2020-01-04 10:05:01 +01:00
PCI	Kernel: Fixing PCI MMIO access mechanism	2020-01-02 21:45:04 +01:00
TTY	Kernel: File::open() should apply r/w mode from the provided options	2020-01-04 12:30:55 +01:00
VM	Kernel: Start implementing x86 SMAP support	2020-01-05 18:14:51 +01:00
.bochsrc	Meta: Make Serenity run on Bochs once again	2019-08-06 21:09:24 +02:00
.gitignore	Meta: Removed all gitignore in the source tree only keeping the root one	2019-06-30 10:41:26 +02:00
Assertions.h	Kernel: Move i386.{cpp,h} => Arch/i386/CPU.{cpp,h}	2019-06-07 20:02:01 +02:00
build-gpt-image-grub.sh	Build: Fix more bugs in the POSIX sh-ification of scripts	2019-11-03 13:11:43 +01:00
build-image-grub.sh	Build: Bump the default disk image size from 500MB to 600MB	2019-11-26 12:54:33 +01:00
build-image-qemu.sh	Build: add support for building on OpenBSD	2020-01-02 21:03:53 +01:00
build-root-filesystem.sh	Base: Only allow members of the "wheel" group to use /bin/su	2020-01-04 13:35:25 +01:00
CMOS.cpp	AK: Rename the common integer typedefs to make it obvious what they are.	2019-07-03 21:20:13 +02:00
CMOS.h	AK: Rename the common integer typedefs to make it obvious what they are.	2019-07-03 21:20:13 +02:00
Console.cpp	Kernel: Make File's can_read/can_write take a const FileDescription&	2019-11-04 14:03:14 +01:00
Console.h	Kernel: Make File's can_read/can_write take a const FileDescription&	2019-11-04 14:03:14 +01:00
DoubleBuffer.cpp	Revert "Kernel: Make DoubleBuffer use a KBuffer instead of kmalloc()ing"	2019-10-18 15:58:06 +02:00
DoubleBuffer.h	Revert "Kernel: Make DoubleBuffer use a KBuffer instead of kmalloc()ing"	2019-10-18 15:58:06 +02:00
FB.h	Kernel: Add framebuffer ioctls; wrap raw ioctls with a C API	2019-08-18 07:40:02 +02:00
grub_gpt.cfg	Kernel: Embrace the SerenityOS name	2019-12-29 19:08:02 +01:00
grub.cfg	Kernel: Embrace the SerenityOS name	2019-12-29 19:08:02 +01:00
init.cpp	Kernel: Add a more expressive API for getting random bytes	2020-01-03 12:43:07 +01:00
IO.h	Kernel: First cut of a sb16 driver	2019-07-13 08:00:24 +02:00
IRQHandler.cpp	Kernel: Move PIC.cpp into Arch/i386/	2019-07-09 15:04:43 +02:00
IRQHandler.h	AK: Rename the common integer typedefs to make it obvious what they are.	2019-07-03 21:20:13 +02:00
KBuffer.h	Kernel: Make kernel memory regions be non-executable by default	2019-12-25 22:41:34 +01:00
KBufferBuilder.cpp	Kernel: Make kernel memory regions be non-executable by default	2019-12-25 22:41:34 +01:00
KBufferBuilder.h	AK: Rename <AK/AKString.h> to <AK/String.h>	2019-09-06 15:36:54 +02:00
KernelInfoPage.h	Kernel+LibC: Publish a "kernel info page" and use it for gettimeofday()	2019-12-15 21:29:26 +01:00
KeyCode.h	Kernel: Implement AltGr key support	2019-12-31 19:31:42 +01:00
KParams.cpp	AK: Make HashMap::get(Key) return an Optional<Value>.	2019-07-24 10:25:43 +02:00
KParams.h	AK: Rename <AK/AKString.h> to <AK/String.h>	2019-09-06 15:36:54 +02:00
kprintf.cpp	Kernel: Demangle userspace ELF symbols in backtraces	2019-11-27 14:06:24 +01:00
KResult.h	Kernel: Add move assign operator to KResultOr	2019-12-29 23:01:27 +01:00
kstdio.h	Build: Get rid of the USERLAND define	2019-12-20 22:59:11 +01:00
KSyms.cpp	Kernel: Start implementing x86 SMAP support	2020-01-05 18:14:51 +01:00
KSyms.h	Kernel: Allow modules to link against anything in kernel.map :^)	2019-11-28 21:30:20 +01:00
linker.ld	Revert "Kernel: Move Kernel mapping to 0xc0000000"	2019-11-23 17:27:09 +01:00
Lock.cpp	Kernel: Use a dedicated thread state for wait-queued threads	2019-12-01 16:02:58 +01:00
Lock.h	Kernel: Add Lock::is_locked()	2019-12-26 11:43:23 +01:00
makeall.sh	Build: add support for building on OpenBSD	2020-01-02 21:03:53 +01:00
Makefile	Kernel: Add a more expressive API for getting random bytes	2020-01-03 12:43:07 +01:00
mkmap.sh	Kernel: Allow modules to link against anything in kernel.map :^)	2019-11-28 21:30:20 +01:00
Module.h	Kernel: Implement basic module unloading :^)	2019-11-28 21:07:22 +01:00
MousePacket.h	AK: Rename the common integer typedefs to make it obvious what they are.	2019-07-03 21:20:13 +02:00
Multiboot.h	AK: Rename the common integer typedefs to make it obvious what they are.	2019-07-03 21:20:13 +02:00
Process.cpp	Kernel: Start implementing x86 SMAP support	2020-01-05 18:14:51 +01:00
Process.h	Kernel: Remove some unused Process members	2020-01-04 19:53:29 +01:00
ProcessTracer.cpp	AK: Rename the common integer typedefs to make it obvious what they are.	2019-07-03 21:20:13 +02:00
ProcessTracer.h	Kernel: Make File's can_read/can_write take a const FileDescription&	2019-11-04 14:03:14 +01:00
Profiling.cpp	Kernel: Separate out the symbol offsets in profile output	2019-12-12 21:59:47 +01:00
Profiling.h	Kernel: Separate out the symbol offsets in profile output	2019-12-12 21:59:47 +01:00
Random.cpp	Kernel: Add a more expressive API for getting random bytes	2020-01-03 12:43:07 +01:00
Random.h	Kernel: Add a more expressive API for getting random bytes	2020-01-03 12:43:07 +01:00
RTC.cpp	Kernel: Fix BIOS date/time on hardware	2019-09-28 13:59:49 +02:00
RTC.h	Add clang-format file	2019-05-28 17:31:20 +02:00
run	Kernel: Fixing PCI MMIO access mechanism	2020-01-02 21:45:04 +01:00
Scheduler.cpp	Kernel: Prevent executing I/O instructions in userspace	2020-01-01 17:31:41 +01:00
Scheduler.h	Kernel: Switch to eagerly restoring x86 FPU state on context switch	2020-01-01 16:54:21 +01:00
SharedBuffer.cpp	Kernel: Rename vmo => vmobject everywhere	2019-12-19 19:15:27 +01:00
SharedBuffer.h	Kernel+LibC: Make all SharedBuffers purgeable (default: non-volatile)	2019-12-09 20:06:47 +01:00
StdLib.cpp	Kernel: Start implementing x86 SMAP support	2020-01-05 18:14:51 +01:00
StdLib.h	Kernel: Start implementing x86 SMAP support	2020-01-05 18:14:51 +01:00
sync.sh	Build: Make sure PATH is passed properly (#765)	2019-11-12 10:26:50 +01:00
Syscall.cpp	Kernel: Start implementing x86 SMAP support	2020-01-05 18:14:51 +01:00
Syscall.h	Kernel: Remove unused "putch" syscall	2020-01-04 16:00:25 +01:00
TestModule.cpp	Kernel: Have modules export their name in a "module_name" string	2019-11-29 21:31:17 +01:00
Thread.cpp	Kernel: Start implementing x86 SMAP support	2020-01-05 18:14:51 +01:00
Thread.h	Kernel: Switch to eagerly restoring x86 FPU state on context switch	2020-01-01 16:54:21 +01:00
TimerQueue.cpp	Kernel: Add kernel-level timer queue (heavily based on @juliusf's work)	2019-12-27 02:15:45 +01:00
TimerQueue.h	Kernel: Add kernel-level timer queue (heavily based on @juliusf's work)	2019-12-27 02:15:45 +01:00
UnixTypes.h	Kernel: Add a mode flag to sys$purge and allow purging clean inodes	2019-12-29 13:16:53 +01:00
WaitQueue.cpp	Kernel: Use IntrusiveList to make WaitQueue allocation-free :^)	2019-12-22 12:38:01 +01:00
WaitQueue.h	Kernel: Use IntrusiveList to make WaitQueue allocation-free :^)	2019-12-22 12:38:01 +01:00