[LLVMdev] Question about ctors, dtors and sections on Windows

[Anton Korobeynikov]

Hello

> On Windows, functions from llvm.global_ctors are placed in section .CRT$XCU,
> which is automatically called by the MS C Runtime.
Only if you link with MS runtime. Mingw follows standard .ctors / .dtors scheme.

> My expectation was that the dtors placed in .CRT$XTU which are the C
> terminator functions. Maybe there is a way to customize this?
Yes. Target (or,rather subtarget) specifies this. Looks like it was
somehow missed for dtors.

> - How can I control section attributes and alingment? E.g. the .CRT$XU
> segment is read-only. How can I specify that?
This is job of target, not user code. If you need such granularity -
write assembler

> - How can I place constant data in the .rdata section?
The global should be constant. Everything should happen automagically.
It might be some stuff which depends on relocations, etc.

-- 
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University