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Properly define va_arg and va_list for aarch64-apple-darwin

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From [Apple][]:

> Because of these changes, the type `va_list` is an alias for `char*`,
> and not for the struct type in the generic procedure call standard.

With this change `/x.py test --stage 1 src/test/ui/abi/variadic-ffi`
passes.

Fixes #78092

[Apple]: https://developer.apple.com/documentation/xcode/writing_arm64_code_for_apple_platforms
This commit is contained in:
Jake Goulding 2020-10-19 21:48:58 -04:00
parent c6ab758e54
commit 0a91755ff4
2 changed files with 13 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
compiler/rustc_codegen_llvm/src/va_arg.rs
View File

@ -184,8 +184,8 @@ pub(super) fn emit_va_arg(
"aarch64" if target.options.is_like_windows => {
emit_ptr_va_arg(bx, addr, target_ty, false, Align::from_bytes(8).unwrap(), false)
}
// iOS AArch64
"aarch64" if target.target_os == "ios" => {
// macOS / iOS AArch64
"aarch64" if target.options.is_like_osx => {
emit_ptr_va_arg(bx, addr, target_ty, false, Align::from_bytes(8).unwrap(), true)
}
"aarch64" => emit_aapcs_va_arg(bx, addr, target_ty),

18
library/core/src/ffi.rs
View File

@ -62,7 +62,7 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
// The name is WIP, using `VaListImpl` for now.
#[cfg(any(
all(not(target_arch = "aarch64"), not(target_arch = "powerpc"), not(target_arch = "x86_64")),
all(target_arch = "aarch64", target_os = "ios"),
all(target_arch = "aarch64", any(target_os = "macos", target_os = "ios")),
target_arch = "wasm32",
target_arch = "asmjs",
windows
@ -85,7 +85,7 @@ pub struct VaListImpl<'f> {
#[cfg(any(
all(not(target_arch = "aarch64"), not(target_arch = "powerpc"), not(target_arch = "x86_64")),
all(target_arch = "aarch64", target_os = "ios"),
all(target_arch = "aarch64", any(target_os = "macos", target_os = "ios")),
target_arch = "wasm32",
target_arch = "asmjs",
windows
@ -107,7 +107,11 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
///
/// [AArch64 Procedure Call Standard]:
/// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0055b/IHI0055B_aapcs64.pdf
#[cfg(all(target_arch = "aarch64", not(target_os = "ios"), not(windows)))]
#[cfg(all(
target_arch = "aarch64",
not(any(target_os = "macos", target_os = "ios")),
not(windows)
))]
#[repr(C)]
#[derive(Debug)]
#[unstable(
@ -181,7 +185,7 @@ pub struct VaList<'a, 'f: 'a> {
not(target_arch = "powerpc"),
not(target_arch = "x86_64")
),
all(target_arch = "aarch64", target_os = "ios"),
all(target_arch = "aarch64", any(target_os = "macos", target_os = "ios")),
target_arch = "wasm32",
target_arch = "asmjs",
windows
@ -190,7 +194,7 @@ pub struct VaList<'a, 'f: 'a> {
#[cfg(all(
any(target_arch = "aarch64", target_arch = "powerpc", target_arch = "x86_64"),
any(not(target_arch = "aarch64"), not(target_os = "ios")),
any(not(target_arch = "aarch64"), not(any(target_os = "macos", target_os = "ios"))),
not(target_arch = "wasm32"),
not(target_arch = "asmjs"),
not(windows)
@ -202,7 +206,7 @@ pub struct VaList<'a, 'f: 'a> {
#[cfg(any(
all(not(target_arch = "aarch64"), not(target_arch = "powerpc"), not(target_arch = "x86_64")),
all(target_arch = "aarch64", target_os = "ios"),
all(target_arch = "aarch64", any(target_os = "macos", target_os = "ios")),
target_arch = "wasm32",
target_arch = "asmjs",
windows
@ -223,7 +227,7 @@ pub fn as_va_list<'a>(&'a mut self) -> VaList<'a, 'f> {
#[cfg(all(
any(target_arch = "aarch64", target_arch = "powerpc", target_arch = "x86_64"),
any(not(target_arch = "aarch64"), not(target_os = "ios")),
any(not(target_arch = "aarch64"), not(any(target_os = "macos", target_os = "ios"))),
not(target_arch = "wasm32"),
not(target_arch = "asmjs"),
not(windows)