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| author | Antoni Boucher <bouanto@zoho.com> | 2020-05-10 10:54:30 -0400 |
|---|---|---|
| committer | Antoni Boucher <bouanto@zoho.com> | 2021-08-12 21:46:50 -0400 |
| commit | afae271d5d3719eeb92c18bc004bb6d1965a5f3f (patch) | |
| tree | 112ee82672246e8e8fdff1cf19c8a515cfc6815e /example/alloc_example.rs | |
| download | rust-afae271d5d3719eeb92c18bc004bb6d1965a5f3f.tar.gz rust-afae271d5d3719eeb92c18bc004bb6d1965a5f3f.zip | |
Initial commit
Diffstat (limited to 'example/alloc_example.rs')
| -rw-r--r-- | example/alloc_example.rs | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/example/alloc_example.rs b/example/alloc_example.rs new file mode 100644 index 00000000000..bc6dd007ba0 --- /dev/null +++ b/example/alloc_example.rs @@ -0,0 +1,41 @@ +#![feature(start, box_syntax, core_intrinsics, alloc_prelude, alloc_error_handler)] +#![no_std] + +extern crate alloc; +extern crate alloc_system; + +use alloc::prelude::v1::*; + +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) -> ! { + unsafe { + core::intrinsics::abort(); + } +} + +#[alloc_error_handler] +fn alloc_error_handler(_: alloc::alloc::Layout) -> ! { + unsafe { + core::intrinsics::abort(); + } +} + +#[start] +fn main(_argc: isize, _argv: *const *const u8) -> isize { + let world: Box<&str> = box "Hello World!\0"; + unsafe { + puts(*world as *const str as *const u8); + } + + 0 +} |
