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Rollup merge of #81598 - sivadeilra:windows_dll_imports_fix_x86, r=m-ou-se 

Fix calling convention for CRT startup

My PR #81478 used the wrong calling convention for a set of
functions that are called by the CRT. These functions need to use
`extern "C"`.

This would only affect x86, which is the only target (that I know of)
that has multiple calling conventions.

```@bors``` r? ```@m-ou-se```
This commit is contained in:
Jonas Schievink 2021-02-01 14:29:45 +01:00 committed by GitHub
parent 52907cc237 3acd1a4f92
commit 2622227208
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1 changed files with 10 additions and 12 deletions
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22
library/std/src/sys/windows/compat.rs
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@ -74,9 +74,9 @@ macro_rules! compat_fn {
/// used, and would remove it.
#[used]
#[link_section = ".CRT$XCU"]
static INIT_TABLE_ENTRY: fn() = init;
static INIT_TABLE_ENTRY: unsafe extern "C" fn() = init;
fn init() {
unsafe extern "C" fn init() {
// There is no locking here. This code is executed before main() is entered, and
// is guaranteed to be single-threaded.
//
@ -84,16 +84,14 @@ macro_rules! compat_fn {
// any Rust functions or CRT functions, if those functions touch any global state,
// because this function runs during global initialization. For example, DO NOT
// do any dynamic allocation, don't call LoadLibrary, etc.
unsafe {
let module_name: *const u8 = concat!($module, "\0").as_ptr();
let symbol_name: *const u8 = concat!(stringify!($symbol), "\0").as_ptr();
let module_handle = $crate::sys::c::GetModuleHandleA(module_name as *const i8);
if !module_handle.is_null() {
match $crate::sys::c::GetProcAddress(module_handle, symbol_name as *const i8) as usize {
0 => {}
n => {
PTR = Some(mem::transmute::<usize, F>(n));
}
let module_name: *const u8 = concat!($module, "\0").as_ptr();
let symbol_name: *const u8 = concat!(stringify!($symbol), "\0").as_ptr();
let module_handle = $crate::sys::c::GetModuleHandleA(module_name as *const i8);
if !module_handle.is_null() {
match $crate::sys::c::GetProcAddress(module_handle, symbol_name as *const i8) as usize {
0 => {}
n => {
PTR = Some(mem::transmute::<usize, F>(n));
}
}
}