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This is esp iot sdk RTOS initial version.

tools/gen_appbin.py

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+#!/usr/bin/python
+#
+#  Copyright (c) 2010 Espressif System
+#
+#     grab user_start() address and pass it to genflashbin program
+#
+
+import string
+import sys
+import os
+import re
+
+if len(sys.argv) != 3:
+    print 'Usage: gen_appbin.py eagle.app.out version'
+    sys.exit(0)
+
+elf_file = sys.argv[1]
+ver = sys.argv[2]
+#print elf_file
+
+cmd = 'xt-nm -g ' + elf_file + ' > eagle.app.sym'
+#print cmd
+os.system(cmd)
+
+fp = file('./eagle.app.sym')
+if fp is None:
+    print "open sym file error\n"
+    exit
+
+lines = fp.readlines()
+
+fp.close()
+
+entry_addr = None
+p = re.compile('(\w*)(\sT\s)(call_user_start)$')
+for line in lines:
+    m = p.search(line)
+    if m != None:
+        entry_addr = m.group(1)
+        #entry_addr = int(entry_addr, 16)
+        print entry_addr
+
+if entry_addr is None:
+    print 'no entry point!!'
+    exit
+
+data_start_addr = '0'
+p = re.compile('(\w*)(\sA\s)(_data_start)$')
+for line in lines:
+    m = p.search(line)
+    if m != None:
+        data_start_addr = m.group(1)
+        print data_start_addr
+
+rodata_start_addr = '0'
+p = re.compile('(\w*)(\sA\s)(_rodata_start)$')
+for line in lines:
+    m = p.search(line)
+    if m != None:
+        rodata_start_addr = m.group(1)
+        print rodata_start_addr
+
+cmd = 'genflashbin%s eagle.app.%s.text.bin '%(ver, ver)+entry_addr+' eagle.app.%s.data.bin '%(ver)+ data_start_addr+' eagle.app.%s.rodata.bin '%(ver)+rodata_start_addr
+
+print cmd
+os.system(cmd)
+
+cmd = 'mv eagle.app.flash.bin eagle.app.%s.flash.bin'%(ver)
+
+print cmd
+os.system(cmd)