scripts: install pahole and download linux

Add scripts that enable vmlinux.h generation from scratch:
  * install-pahole.sh downloads and builds pahole from source
  * download-latest-linux-release.sh finds and fetches latest linux
    release from kernel.org

Signed-off-by: Ihor Solodrai <[email protected]>

Author: theihor

scripts/download-latest-linux-release.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -eux
+
+sudo apt install -y curl jq tar xz-utils
+
+url=$(curl -s https://www.kernel.org/releases.json \
+        | jq -r '.releases[] | select(.moniker == "mainline") | .source')
+
+curl -O "$url"
+tar -xf $(basename "$url")
+
+dir=$(basename "$url" | sed 's/\.tar\.xz$//')
+mv $dir linux
+
+rm $(basename "$url")

scripts/install-dependencies.sh

@@ -9,7 +9,7 @@ export GCC_VERSION=${GCC_VERSION:-"13"}
 
 sudo apt update -y
 DEBIAN_FRONTEND=noninteractive apt-get install -y tzdata
-sudo apt install -y bc bison build-essential elfutils flex make ncurses-dev pahole python3-docutils zstd
+sudo apt install -y bc bison build-essential elfutils flex make ncurses-dev python3-docutils zstd
 sudo apt install -y libelf-dev libdw-dev
 
 # Install cross-compilers
@@ -26,3 +26,5 @@ for arch in aarch64 s390x ppc64le riscv64 arm loongarch64; do
                 ${compiler_id}-gcc \
                 /usr/bin/${compiler_id}-gcc-${GCC_VERSION}
 done
+
+$(dirname "$0")/install-pahole.sh

scripts/install-pahole.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+set -eux
+
+PAHOLE_ORIGIN=${PAHOLE_ORIGIN:-https://git.kernel.org/pub/scm/devel/pahole/pahole.git}
+PAHOLE_REVISION=${PAHOLE_REVISION:-v1.29}
+
+sudo apt -y install cmake git libdw-dev libelf-dev
+
+WORKSPACE=$(mktemp -d -t pahole.XXXXXX)
+pushd "$WORKSPACE"
+git clone ${PAHOLE_ORIGIN} \
+        --branch "${PAHOLE_REVISION}" \
+        --depth=1 \
+        --single-branch
+cd pahole
+mkdir -p build
+cmake -B=build -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr
+make -C build -j
+sudo make -C build install
+popd
+rm -rf "$WORKSPACE"