binman: Support ELF files for U-Boot and SPL

For sandbox we want to put ELF files in the image since that is what we
need to execute. Add support for this.

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/binman/README.entries

@@ -361,6 +361,17 @@ it available to u_boot_ucode.
 
 
 
+Entry: u-boot-elf: U-Boot ELF image
+-----------------------------------
+
+Properties / Entry arguments:
+    - filename: Filename of u-boot (default 'u-boot')
+
+This is the U-Boot ELF image. It does not include a device tree but can be
+relocated to any address for execution.
+
+
+
 Entry: u-boot-img: U-Boot legacy image
 --------------------------------------
 
@@ -444,6 +455,17 @@ to activate.
 
 
 
+Entry: u-boot-spl-elf: U-Boot SPL ELF image
+-------------------------------------------
+
+Properties / Entry arguments:
+    - filename: Filename of SPL u-boot (default 'spl/u-boot')
+
+This is the U-Boot SPL ELF image. It does not include a device tree but can
+be relocated to any address for execution.
+
+
+
 Entry: u-boot-spl-nodtb: SPL binary without device tree appended
 ----------------------------------------------------------------
 

tools/binman/etype/u_boot_elf.py

@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright (c) 2018 Google, Inc
+# Written by Simon Glass <sjg@chromium.org>
+#
+# Entry-type module for U-Boot ELF image
+#
+
+from entry import Entry
+from blob import Entry_blob
+
+import fdt_util
+import tools
+
+class Entry_u_boot_elf(Entry_blob):
+    """U-Boot ELF image
+
+    Properties / Entry arguments:
+        - filename: Filename of u-boot (default 'u-boot')
+
+    This is the U-Boot ELF image. It does not include a device tree but can be
+    relocated to any address for execution.
+    """
+    def __init__(self, section, etype, node):
+        Entry_blob.__init__(self, section, etype, node)
+        self._strip = fdt_util.GetBool(self._node, 'strip')
+
+    def ReadBlobContents(self):
+        if self._strip:
+            uniq = self.GetUniqueName()
+            out_fname = tools.GetOutputFilename('%s.stripped' % uniq)
+            tools.WriteFile(out_fname, tools.ReadFile(self._pathname))
+            tools.Run('strip', out_fname)
+            self.SetContents(tools.ReadFile(out_fname))
+        else:
+            self.SetContents(tools.ReadFile(self._pathname))
+        return True
+
+    def GetDefaultFilename(self):
+        return 'u-boot'

tools/binman/etype/u_boot_spl_elf.py

@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Copyright (c) 2018 Google, Inc
+# Written by Simon Glass <sjg@chromium.org>
+#
+# Entry-type module for U-Boot SPL ELF image
+#
+
+from entry import Entry
+from blob import Entry_blob
+
+class Entry_u_boot_spl_elf(Entry_blob):
+    """U-Boot SPL ELF image
+
+    Properties / Entry arguments:
+        - filename: Filename of SPL u-boot (default 'spl/u-boot')
+
+    This is the U-Boot SPL ELF image. It does not include a device tree but can
+    be relocated to any address for execution.
+    """
+    def __init__(self, section, etype, node):
+        Entry_blob.__init__(self, section, etype, node)
+
+    def GetDefaultFilename(self):
+        return 'spl/u-boot-spl'

tools/binman/ftest.py

@@ -1708,6 +1708,22 @@ class TestFunctional(unittest.TestCase):
                          fmap_util.FMAP_AREA_LEN * 3, fentries[2].size)
         self.assertEqual('FMAP', fentries[2].name)
 
+    def testElf(self):
+        """Basic test of ELF entries"""
+        with open(self.TestFile('bss_data')) as fd:
+            TestFunctional._MakeInputFile('spl/u-boot-spl', fd.read())
+        with open(self.TestFile('bss_data')) as fd:
+            TestFunctional._MakeInputFile('-boot', fd.read())
+        data = self._DoReadFile('96_elf.dts')
+
+    def testElfStripg(self):
+        """Basic test of ELF entries"""
+        with open(self.TestFile('bss_data')) as fd:
+            TestFunctional._MakeInputFile('spl/u-boot-spl', fd.read())
+        with open(self.TestFile('bss_data')) as fd:
+            TestFunctional._MakeInputFile('-boot', fd.read())
+        data = self._DoReadFile('97_elf_strip.dts')
+
 
 if __name__ == "__main__":
     unittest.main()

tools/binman/test/96_elf.dts

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0+
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	binman {
+		u-boot-elf {
+		};
+		u-boot-spl-elf {
+		};
+	};
+};

tools/binman/test/97_elf_strip.dts

@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0+
+/dts-v1/;
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	binman {
+		u-boot-elf {
+			strip;
+		};
+		u-boot-spl-elf {
+		};
+	};
+};