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42 lines
1.2 KiB
Rust
42 lines
1.2 KiB
Rust
// Copyright 2023 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// ANCHOR: Alloc
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#![no_main]
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#![no_std]
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extern crate alloc;
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extern crate panic_halt as _;
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use alloc::string::ToString;
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use alloc::vec::Vec;
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use buddy_system_allocator::LockedHeap;
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#[global_allocator]
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static HEAP_ALLOCATOR: LockedHeap<32> = LockedHeap::<32>::new();
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static mut HEAP: [u8; 65536] = [0; 65536];
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pub fn entry() {
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// SAFETY: `HEAP` is only used here and `entry` is only called once.
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unsafe {
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// Give the allocator some memory to allocate.
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HEAP_ALLOCATOR.lock().init(HEAP.as_mut_ptr() as usize, HEAP.len());
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}
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// Now we can do things that require heap allocation.
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let mut v = Vec::new();
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v.push("A string".to_string());
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}
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