Add memory operation syscalls (#16447)

programs/bpf/rust/membuiltins/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "solana-bpf-rust-membuiltins"
+version = "1.8.0"
+description = "Solana BPF test program written in Rust"
+authors = ["Solana Maintainers <maintainers@solana.foundation>"]
+repository = "https://github.com/solana-labs/solana"
+license = "Apache-2.0"
+homepage = "https://solana.com/"
+documentation = "https://docs.rs/solana-bpf-rust-mem"
+edition = "2018"
+
+[dependencies]
+solana-bpf-rust-mem = { path = "../mem", version = "=1.8.0", features = [ "no-entrypoint" ] }
+solana-program = { path = "../../../../sdk/program", version = "=1.8.0" }
+
+[lib]
+crate-type = ["cdylib"]
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]

programs/bpf/rust/membuiltins/src/lib.rs

@@ -0,0 +1,39 @@
+//! @brief Test builtin mem functions
+
+#![cfg(target_arch = "bpf")]
+#![feature(rustc_private)]
+
+extern crate compiler_builtins;
+use solana_bpf_rust_mem::{run_mem_tests, MemOps};
+use solana_program::{custom_panic_default, entrypoint::SUCCESS};
+
+#[no_mangle]
+pub extern "C" fn entrypoint(_input: *mut u8) -> u64 {
+    #[derive(Default)]
+    struct MemOpSyscalls();
+    impl MemOps for MemOpSyscalls {
+        fn memcpy(&self, dst: &mut [u8], src: &[u8], n: usize) {
+            unsafe {
+                compiler_builtins::mem::memcpy(dst.as_mut_ptr(), src.as_ptr(), n);
+            }
+        }
+        unsafe fn memmove(&self, dst: *mut u8, src: *mut u8, n: usize) {
+            compiler_builtins::mem::memmove(dst, src, n);
+        }
+        fn memset(&self, s: &mut [u8], c: u8, n: usize) {
+            unsafe {
+                compiler_builtins::mem::memset(s.as_mut_ptr(), c as i32, n);
+            }
+        }
+        fn memcmp(&self, s1: &[u8], s2: &[u8], n: usize) -> i32 {
+            unsafe { compiler_builtins::mem::memcmp(s1.as_ptr(), s2.as_ptr(), n) }
+        }
+    }
+    let mem_ops = MemOpSyscalls::default();
+
+    run_mem_tests(mem_ops);
+
+    SUCCESS
+}
+
+custom_panic_default!();