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// SPDX-License-Identifier: MIT
// Copyright (c) 2015-2021 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 = @import("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$XLZ") = null;
comptime {
if (builtin.target.cpu.arch == .i386) {
// The __tls_array is the offset of the ThreadLocalStoragePointer field
// in the TEB block whose base address held in the %fs segment.
asm (
\\ .global __tls_array
\\ __tls_array = 0x2C
);
}
}
// TODO this is how I would like it to be expressed
// TODO also note, ReactOS has a +1 on StartAddressOfRawData and AddressOfCallBacks. Investigate
// why they do that.
//export const _tls_used linksection(".rdata$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,
};
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