Multi rust projects (#4362)

sdk/bpf/rust-utils/bpf.ld

@@ -0,0 +1,19 @@
+PHDRS
+{
+  text PT_LOAD  ;
+  rodata PT_LOAD ;
+  dynamic PT_DYNAMIC ;
+}
+
+SECTIONS
+{
+  . = SIZEOF_HEADERS;
+  .text : { *(.text) } :text
+  .rodata : { *(.rodata) } :rodata
+  .dynamic : { *(.dynamic) } :dynamic
+  .dynsym : { *(.dynsym) } :dynamic
+  .dynstr : { *(.dynstr) } :dynamic
+  .gnu.hash : { *(.gnu.hash) } :dynamic
+  .rel.dyn : { *(.rel.dyn) } :dynamic
+  .hash : { *(.hash) } :dynamic
+}

sdk/bpf/rust-utils/build.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+
+if [ "$#" -ne 1 ]; then
+    echo "Error: Must provide the full path to the project to build"
+    exit 1
+fi
+if [ ! -d "$1" ]; then
+      echo "Error: Cannot find project: $1"
+    exit 1
+fi
+
+cd "$(dirname "$0")"
+bpf_sdk="$PWD/.."
+export XARGO_HOME="$PWD/../../../target/xargo"
+
+cd "$1"
+
+cargo install xargo
+
+set -e
+
+# Ensure the sdk is installed
+"$bpf_sdk"/scripts/install.sh
+
+export RUSTUP_TOOLCHAIN=bpf
+export RUSTFLAGS="
+    --emit=llvm-ir \
+    -C lto=no \
+    -C opt-level=2 \
+    -C link-arg=-z -C link-arg=notext \
+    -C link-arg=-T$bpf_sdk/rust-utils/bpf.ld \
+    -C link-arg=--Bdynamic \
+    -C link-arg=-shared \
+    -C link-arg=--entry=entrypoint \
+    -C linker=$bpf_sdk/llvm-native/bin/ld.lld"
+export XARGO_RUST_SRC="$bpf_sdk/rust-bpf-sysroot/src"
+xargo build --target bpfel-unknown-unknown --release -v
+
+{ { set +x; } 2>/dev/null; echo Success; }

sdk/bpf/rust-utils/clean.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+if [ "$#" -ne 1 ]; then
+    echo "Error: Must provide the full path to the project to build"
+    exit 1
+fi
+if [ ! -d "$1" ]; then
+      echo "Error: Cannot find project: $1"
+    exit 1
+fi
+
+cd "$1"
+
+set -ex
+
+cargo clean