diff options
Diffstat (limited to 'compiler/rustc_codegen_gcc/example/alloc_example.rs')
| -rw-r--r-- | compiler/rustc_codegen_gcc/example/alloc_example.rs | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_gcc/example/alloc_example.rs b/compiler/rustc_codegen_gcc/example/alloc_example.rs new file mode 100644 index 00000000000..6ed8b9157f2 --- /dev/null +++ b/compiler/rustc_codegen_gcc/example/alloc_example.rs @@ -0,0 +1,48 @@ +#![feature(start, core_intrinsics, alloc_error_handler, lang_items)] +#![no_std] +#![allow(internal_features)] + +extern crate alloc; +extern crate alloc_system; + +use alloc::boxed::Box; + +use alloc_system::System; + +#[global_allocator] +static ALLOC: System = System; + +#[link(name = "c")] +extern "C" { + fn puts(s: *const u8) -> i32; +} + +#[panic_handler] +fn panic_handler(_: &core::panic::PanicInfo<'_>) -> ! { + core::intrinsics::abort(); +} + +#[alloc_error_handler] +fn alloc_error_handler(_: alloc::alloc::Layout) -> ! { + core::intrinsics::abort(); +} + +#[lang = "eh_personality"] +fn eh_personality() -> ! { + loop {} +} + +#[no_mangle] +unsafe extern "C" fn _Unwind_Resume() { + core::intrinsics::unreachable(); +} + +#[start] +fn main(_argc: isize, _argv: *const *const u8) -> isize { + let world: Box<&str> = Box::new("Hello World!\0"); + unsafe { + puts(*world as *const str as *const u8); + } + + 0 +} |
