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8 commits

Author SHA1 Message Date
Andreas Kling
ec6bceaa08 Kernel: Support thread-local storage
This patch adds support for TLS according to the x86 System V ABI.
Each thread gets a thread-specific memory region, and the GS segment
register always points _to a pointer_ to the thread-specific memory.

In other words, to access thread-local variables, userspace programs
start by dereferencing the pointer at [gs:0].

The Process keeps a master copy of the TLS segment that new threads
should use, and when a new thread is created, they get a copy of it.
It's basically whatever the PT_TLS program header in the ELF says.
2019-09-07 15:55:36 +02:00
Andreas Kling
eca5c2bdf8 Kernel: Move VirtualAddress.h into VM/ 2019-07-09 15:04:45 +02:00
Andreas Kling
27f699ef0c AK: Rename the common integer typedefs to make it obvious what they are.
These types can be picked up by including <AK/Types.h>:

* u8, u16, u32, u64 (unsigned)
* i8, i16, i32, i64 (signed)
2019-07-03 21:20:13 +02:00
Andreas Kling
f83263a72b Kernel: Use a raw VM region for sorting ELF symbols instead of a Vector.
This avoids putting pressure on kmalloc() during backtrace symbolication.
Since we dump backtrace for every process that exits, this is actually a
decent performance improvement for things like GCC that chain a lot of
processes together.
2019-06-27 10:49:49 +02:00
Andreas Kling
9145917bf0 ELF: Run clang-format on everything. 2019-06-07 17:12:30 +02:00
Andreas Kling
e42c3b4fd7 Kernel: Rename LinearAddress => VirtualAddress. 2019-06-07 12:56:50 +02:00
Andreas Kling
baaede1bf9 Kernel: Make the Process allocate_region* API's understand "int prot".
Instead of having to inspect 'prot' at every call site, make the Process
API's take care of that so we can just pass it through.
2019-05-30 16:14:37 +02:00
Robin Burchell
6917c42140 Kernel/AK: Move ELF loader to AK
This is in preparation for eventually using it in userspace.
LinearAddress.h has not been moved for the time being (as it seems to be
only used by a very small part of the code).
2019-05-23 16:57:34 +02:00
Renamed from Kernel/ELF/ELFLoader.h (Browse further)