1 files changed, 54 insertions, 0 deletions

diff --git a/meta/lib/oe/qemu.py b/meta/lib/oe/qemu.py
new file mode 100644
index 0000000000..769865036c
--- /dev/null
+++ b/meta/lib/oe/qemu.py
@@ -0,0 +1,54 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+
+def qemu_target_binary(d):
+    package_arch = d.getVar("PACKAGE_ARCH")
+    qemu_target_binary = (d.getVar("QEMU_TARGET_BINARY_%s" % package_arch) or "")
+    if qemu_target_binary:
+        return qemu_target_binary
+
+    target_arch = d.getVar("TARGET_ARCH")
+    if target_arch in ("i486", "i586", "i686"):
+        target_arch = "i386"
+    elif target_arch == "powerpc":
+        target_arch = "ppc"
+    elif target_arch == "powerpc64":
+        target_arch = "ppc64"
+    elif target_arch == "powerpc64le":
+        target_arch = "ppc64le"
+
+    return "qemu-" + target_arch
+
+def qemu_wrapper_cmdline(d, rootfs_path, library_paths, qemu_options=None):
+    import string
+
+    package_arch = d.getVar("PACKAGE_ARCH")
+    if package_arch == "all":
+        return "false"
+
+    qemu_binary = qemu_target_binary(d)
+    if qemu_binary == "qemu-allarch":
+        qemu_binary = "qemuwrapper"
+
+    if qemu_options == None:
+        qemu_options = d.getVar("QEMU_OPTIONS") or ""
+
+    return "PSEUDO_UNLOAD=1 " + qemu_binary + " " + qemu_options + " -L " + rootfs_path\
+            + " -E LD_LIBRARY_PATH=" + ":".join(library_paths) + " "
+
+# Next function will return a string containing the command that is needed to
+# to run a certain binary through qemu. For example, in order to make a certain
+# postinstall scriptlet run at do_rootfs time and running the postinstall is
+# architecture dependent, we can run it through qemu. For example, in the
+# postinstall scriptlet, we could use the following:
+#
+# ${@qemu_run_binary(d, '$D', '/usr/bin/test_app')} [test_app arguments]
+#
+def qemu_run_binary(d, rootfs_path, binary):
+    libdir = rootfs_path + d.getVar("libdir", False)
+    base_libdir = rootfs_path + d.getVar("base_libdir", False)
+
+    return qemu_wrapper_cmdline(d, rootfs_path, [libdir, base_libdir]) + rootfs_path + binary