Created images.S for loader with a script so that kernel.elf and containers.elf are not hard-coded

scripts/loader/generate_loader_asm.py

@@ -0,0 +1,95 @@
+#! /usr/bin/env python2.6
+# -*- mode: python; coding: utf-8; -*-
+#
+#  Codezero -- a microkernel for embedded systems.
+#
+#  Copyright © 2009  B Labs Ltd
+#
+import os, sys, shelve, subprocess
+from os.path import join
+
+PROJRELROOT = '../../'
+
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), PROJRELROOT)))
+
+from config.projpaths import *
+from config.configuration import *
+
+# Convert address from python literal to numeric value
+def address_remove_literal(address):
+    value = hex(int(address, 16) - 0xf0000000)
+    if value[-1] in ['l', 'L']:
+        value = value[:-1]
+    return value
+
+ksym_header = \
+'''
+/*
+ * %s autogenerated from %s.
+ * by %s
+ *
+ * This file is included by the loader sources so that any
+ * kernel symbol address can be known in advance and stopped
+ * at by debuggers before virtual memory is enabled.
+ */
+'''
+
+assembler_symbol_definition = \
+'''
+.section .text
+.align 4
+.global %s
+.type %s, function
+.equ %s, %s
+'''
+
+def generate_ksym_to_loader(target_path, source_path):
+    print "Source: ", source_path
+    print "Target: ", target_path
+
+    symbols = ['break_virtual']
+    with open(target_path, 'w') as asm_file:
+        asm_file.write(ksym_header % (target_path, source_path, sys.argv[0]))
+        for symbol in symbols:
+            process = subprocess.Popen('arm-none-eabi-objdump -d ' + \
+                                        source_path + ' | grep "<' + \
+                                        symbol + '>"', shell=True, \
+                                        stdout=subprocess.PIPE)
+            assert process.wait() == 0
+            address, name = process.stdout.read().split()
+            assert '<' + symbol + '>:' == name
+            asm_file.write(assembler_symbol_definition % \
+                           (symbol, symbol, symbol, \
+                            address_remove_literal(address)))
+
+decl_sect_asm = \
+'''
+.align 4
+.section %s
+.incbin "%s"
+'''
+
+
+def generate_image_S(target_path, images):
+    kern_fname = 'kernel.elf'
+    conts_fname = 'containers.elf'
+    fbody = ''
+    with open(target_path, 'w+') as images_S:
+        for img in images:
+#            print img[:-len(kern_fname)]
+            print os.path.basename(img.path)
+            if os.path.basename(img.path) == kern_fname:
+                fbody += decl_sect_asm % ('.kernel', img)
+            if os.path.basename(img.path) == conts_fname:
+                fbody += decl_sect_asm % ('.containers', img)
+        images_S.write(fbody)
+
+if __name__ == "__main__":
+    if len(sys.argv) == 1:
+        generate_ksym_to_loader(join(PROJROOT, 'loader/ksyms.S'), \
+                                join(BUILDDIR, 'kernel.elf'))
+    elif len(sys.argv) == 3:
+        generate_ksym_to_loader(sys.argv[1], sys.argv[1])
+    else:
+        print "Usage: %s <asm filename> <kernel image filename>" % sys.argv[0]
+