lcfOS: python/outstream.py comparison

Added zcc test

comparison

equal deleted inserted replaced

-:8b2f20aae086
+:4cb47d80fd1f
+import binascii
+from asmnodes import ALabel
+"""
+The output stream is a stream of instructions that can be output
+to a file or binary or hexfile.
+"""
+class OutputStream:
+def __init__(self):
+self.sections = {}
+self.currentSection = None
+def emit(self, item):
+self.sections[self.currentSection].append(item)
+def selectSection(self, s):
+self.currentSection = s
+if not s in self.sections:
+self.sections[s] = []
+def backpatch(self):
+""" Fixup references to other parts in the assembler """
+for s in self.sections:
+# TODO parameterize this:
+if s == 'code':
+address = 0x08000000
+elif s == 'data':
+address = 0x02000000
+else:
+address = 0x0
+for i in self.sections[s]:
+i.address = address
+if type(i) is ALabel:
+continue
+bts = i.encode()
+address += len(bts)
+def dump(self):
+self.backpatch()
+for s in sorted(self.sections.keys()):
+self.dumpSection(s)
+def dumpSection(self, s):
+print('.section '+s)
+for i in self.sections[s]:
+if type(i) is ALabel:
+print(i)
+else:
+addr = i.address
+insword = i.encode()
+assert type(insword) is bytes
+insword = binascii.hexlify(bytes(reversed(insword))).decode('ascii')
+asm = str(i)
+print('    0x{0:08x} 0x{1} {2}'.format(addr, insword, asm))
+class TextOutputStream(OutputStream):
+pass
+class BinOutputStream(OutputStream):
+def dump(self):
+pass

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