error: undefined symbol: __chkstk on aarch64-unknown-uefi #98254
Labels
C-bug
Category: This is a bug.
E-needs-test
Call for participation: Writing correctness tests.
O-AArch64
Armv8-A or later processors in AArch64 mode
Comments
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See also #57983. There are two possible solutions:
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I'm not sure I totally understand why the link failure is for If I borrow the implementation of Edit: Actually looking at LLVM this is pretty obvious. It will only ever emit a stack probe using |
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I believe this is fixed now, see rust-lang/compiler-builtins#544 Minimal repro: // src/main.rs:
#![no_std]
#![no_main]
#[panic_handler]
fn panic_handler(_info: &core::panic::PanicInfo) -> ! {
loop {}
}
#[export_name = "efi_main"]
fn main() {
let b = [0; 1024];
}$ cargo +1.72 build --target=aarch64-unknown-uefi
# Fails with:
[...]
= note: rust-lld: error: undefined symbol: __chkstk
[...]
$ cargo +1.73 build --target=aarch64-unknown-uefi
# Succeeds |
fee1-dead
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E-needs-test
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I tried this code:
I expected to see this happen: No link error cause it is sound code.
Instead, this happened: I got an undefined symbol error, which seems to be a problem with the compiler/linker being unable to know if Im going to overflow the stack
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rustc --version --verbose:Backtrace
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