6 commits

Author	SHA1	Message	Date
Alex Rønne Petersen	537a873b17	Initial port work for *-windows-itanium support. ... https://llvm.org/docs/HowToBuildWindowsItaniumPrograms.html This is a weird middle ground between `*-windows-gnu` and `*-windows-msvc`. It uses the C++ ABI of the former while using the system libraries of the latter.	2024-09-28 21:43:52 +02:00
Alex Rønne Petersen	cb1fffb29e	std.os.windows.tls: Set AddressOfCallBacks to &__xl_a + 1. ... `__xl_a` is just a global variable containing a null function pointer. There's nothing magical about it or its name at all. The section names used on `__xl_a` and `__xl_b` (`.CRT$XLA` and `.CRT$XLZ`) are the real magic here. The compiler emits TLS variables into `.CRT$XL<x>` sections, where `x` is an uppercase letter between A and Z (exclusive). The linker then sorts those sections alphabetically (due to the `$`), and the result is a neat array of TLS initialization callbacks between `__xl_a` and `__xl_z`. That array is null-terminated, though! Normally, `__xl_z` serves as the null terminator; however, by pointing `AddressesOfCallBacks` to `__xl_a`, which just contains a null function pointer, we've effectively made it so that the PE loader will just immediately stop invoking TLS callbacks. Fix that by pointing to the first actual TLS callback instead (or `__xl_z` if there are none).	2024-08-03 20:55:00 +02:00
Alex Rønne Petersen	1d8fca0060	std.os.windows.tls: Only define _tls_array when targeting MSVC. ... LLVM does not use it when emitting code for the MinGW ABI.	2024-08-03 20:48:48 +02:00
Alex Rønne Petersen	0f1db90198	std.os.windows.tls: Slightly improve type safety.	2024-08-03 20:48:48 +02:00
Alex Rønne Petersen	c2fcdc21c2	std.os.windows.tls: Change type of _tls_start/_tls_end to *anyopaque. ... If they're typed as `u8`, they can be aligned to anything. We want at least pointer size alignment.	2024-08-03 20:47:08 +02:00
Alex Rønne Petersen	8056a85151	std: Move start_windows_tls.zig to os/windows/tls.zig. ... Just to be consistent with Linux.	2024-08-03 20:35:08 +02:00

Renamed from lib/std/start_windows_tls.zig (Browse further)