54 lines
2.0 KiB
Zig
54 lines
2.0 KiB
Zig
// SPDX-License-Identifier: MIT
|
|
// Copyright (c) 2015-2020 Zig Contributors
|
|
// This file is part of [zig](https://ziglang.org/), which is MIT licensed.
|
|
// The MIT license requires this copyright notice to be included in all copies
|
|
// and substantial portions of the software.
|
|
const std = @import("std");
|
|
const builtin = std.builtin;
|
|
|
|
export var _tls_index: u32 = std.os.windows.TLS_OUT_OF_INDEXES;
|
|
export var _tls_start: u8 linksection(".tls") = 0;
|
|
export var _tls_end: u8 linksection(".tls$ZZZ") = 0;
|
|
export var __xl_a: std.os.windows.PIMAGE_TLS_CALLBACK linksection(".CRT$XLA") = null;
|
|
export var __xl_z: std.os.windows.PIMAGE_TLS_CALLBACK linksection(".CRT$XLZ") = null;
|
|
|
|
comptime {
|
|
if (builtin.arch == .i386) {
|
|
// The __tls_array is the offset of the ThreadLocalStoragePointer field
|
|
// in the TEB block whose base address held in the %fs segment.
|
|
asm (
|
|
\\ .global __tls_array
|
|
\\ __tls_array = 0x2C
|
|
);
|
|
}
|
|
}
|
|
|
|
// TODO this is how I would like it to be expressed
|
|
// TODO also note, ReactOS has a +1 on StartAddressOfRawData and AddressOfCallBacks. Investigate
|
|
// why they do that.
|
|
//export const _tls_used linksection(".rdata$T") = std.os.windows.IMAGE_TLS_DIRECTORY {
|
|
// .StartAddressOfRawData = @ptrToInt(&_tls_start),
|
|
// .EndAddressOfRawData = @ptrToInt(&_tls_end),
|
|
// .AddressOfIndex = @ptrToInt(&_tls_index),
|
|
// .AddressOfCallBacks = @ptrToInt(__xl_a),
|
|
// .SizeOfZeroFill = 0,
|
|
// .Characteristics = 0,
|
|
//};
|
|
// This is the workaround because we can't do @ptrToInt at comptime like that.
|
|
pub const IMAGE_TLS_DIRECTORY = extern struct {
|
|
StartAddressOfRawData: *c_void,
|
|
EndAddressOfRawData: *c_void,
|
|
AddressOfIndex: *c_void,
|
|
AddressOfCallBacks: *c_void,
|
|
SizeOfZeroFill: u32,
|
|
Characteristics: u32,
|
|
};
|
|
export const _tls_used linksection(".rdata$T") = IMAGE_TLS_DIRECTORY{
|
|
.StartAddressOfRawData = &_tls_start,
|
|
.EndAddressOfRawData = &_tls_end,
|
|
.AddressOfIndex = &_tls_index,
|
|
.AddressOfCallBacks = &__xl_a,
|
|
.SizeOfZeroFill = 0,
|
|
.Characteristics = 0,
|
|
};
|