add x86 images (#9)

The config is copied from buildroot/x86_64.config modulo CONFIG_64B. Boot tested with a 32b x86 Clang built kernel in qemu. Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
ClangBuiltLinux · Apr 26, 2020 · 6ae3da1 · 6ae3da1
1 parent f0ca342
commit 6ae3da1
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Showing 4 changed files with 20 additions and 2 deletions.
diff --git a/boot-qemu.sh b/boot-qemu.sh
@@ -29,7 +29,7 @@ function parse_parameters() {
             -a | --arch | --architecture)
                 shift
                 case ${1} in
-                    arm32_v5 | arm32_v6 | arm32_v7 | arm64 | mips | mipsel | ppc32 | ppc64 | ppc64le | x86_64) ARCH=${1} ;;
+                    arm32_v5 | arm32_v6 | arm32_v7 | arm64 | mips | mipsel | ppc32 | ppc64 | ppc64le | x86 | x86_64) ARCH=${1} ;;
                     *) die "Invalid --arch value '${1}'" ;;
                 esac
                 ;;
@@ -185,6 +185,13 @@ function setup_qemu_args() {
             QEMU=(qemu-system-ppc64)
             ;;
 
+        x86)
+            KIMAGE=bzImage
+            QEMU_ARCH_ARGS=(-append "console=ttyS0${RDINIT}" -enable-kvm)
+            QEMU_RAM=512m
+            QEMU=(qemu-system-i386)
+            ;;
+
         x86_64)
             KIMAGE=bzImage
             QEMU_ARCH_ARGS=(-append "console=ttyS0${RDINIT}")

diff --git a/buildroot/rebuild.sh b/buildroot/rebuild.sh
@@ -32,7 +32,7 @@ CONFIGS=()
 while ((${#})); do
     case ${1} in
         all) for CONFIG in *.config; do CONFIGS+=("../${CONFIG}"); done ;;
-        arm64 | arm | mips | mipsel | ppc32 | ppc64 | ppc64le | x86_64) CONFIGS+=("../${1}.config") ;;
+        arm64 | arm | mips | mipsel | ppc32 | ppc64 | ppc64le | x86 | x86_64) CONFIGS+=("../${1}.config") ;;
         *) die "Unknown parameter '${1}', exiting!" ;;
     esac
     shift

diff --git a/buildroot/x86.config b/buildroot/x86.config
@@ -0,0 +1,11 @@
+BR2_OPTIMIZE_3=y
+BR2_KERNEL_HEADERS_4_4=y
+BR2_BINUTILS_VERSION_2_31_X=y
+BR2_GCC_VERSION_8_X=y
+BR2_TARGET_GENERIC_ROOT_PASSWD="root"
+BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"
+BR2_ROOTFS_OVERLAY="../overlay-poweroff"
+BR2_PACKAGE_BUSYBOX_SHOW_OTHERS=y
+BR2_PACKAGE_BASH=y
+BR2_TARGET_ROOTFS_CPIO=y
+# BR2_TARGET_ROOTFS_TAR is not set
diff --git a/images/x86/rootfs.cpio.zst b/images/x86/rootfs.cpio.zst