893 lines
21 KiB
Python
Executable File
893 lines
21 KiB
Python
Executable File
#!/usr/bin/python3
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# The OS/K Team licenses this file to you under the MIT license.
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# See the LICENSE file in the project root for more information.
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import re
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import os
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import sys
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import subprocess
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from array import array
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from tempfile import TemporaryFile
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from collections import OrderedDict
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#print("k-as command line: '{}'".format(sys.argv))
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WANT_DISASM = False
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if len(sys.argv) != 5:
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print("Usage: {} (source file) (memory entry point) (output file) (symbols file)"
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.format(sys.argv[0]))
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sys.exit(1)
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source = TemporaryFile(mode="w+")
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instrs = TemporaryFile(mode="w+")
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b_data = TemporaryFile(mode="w+b")
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b_text = TemporaryFile(mode="w+b")
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lst_regs = open(os.path.join(sys.path[0], "regs.lst"))
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lst_instrs = open(os.path.join(sys.path[0], "instrs.lst"))
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main_src = open(sys.argv[1])
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b_out = open(sys.argv[3], "wb")
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b_sym = open(sys.argv[4], "w")
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start_addr = int(sys.argv[2], base=0)
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# os.chdir(os.path.dirname(sys.argv[1]))
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def leave(i):
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source.close()
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instrs.close()
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b_out.close()
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b_sym.close()
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b_data.close()
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b_text.close()
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main_src.close()
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lst_regs.close()
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lst_instrs.close()
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sys.exit(i)
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#-------------------------------------------------------------------------------
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# Defines
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pdefs = dict()
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# registers
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pregs = dict()
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# instructions
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pinstrs = list()
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# labels
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plabels_text = OrderedDict()
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plabels_data = OrderedDict()
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# size of .data section
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pdata = 0
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# size of .text section
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ptext = 0
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# for local labels
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plastlabel = ''
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# file currently being parsed
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pcurfile = sys.argv[1]
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# after parse() is done, pdata and ptext are never modified
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#-------------------------------------------------------------------------------
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def name_valid(name):
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for c in name.lower():
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if not(c in 'abcdefghijklmnopqrstuvwxyz0123456789[$._+]=,'):
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return False
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return True
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def is_number(s):
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try:
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int(s, base=0)
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except ValueError:
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return False
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return True
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arith_expr = re.compile(r'((0x[0-9A-Fa-f]+|[0-9]+)\s*([|&^+\-*]|<<|>>))+\s*(0x[0-9A-Fa-f]+|[0-9]+)')
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def arith_eval(s):
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if arith_expr.match(s):
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return str(eval(s))
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return s
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#-------------------------------------------------------------------------------
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def parse_lst_regs():
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global pregs
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i = 0
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for _, line in enumerate(lst_regs):
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line = line.strip()
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if len(line) == 0:
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continue
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for reg in line.split():
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pregs[reg] = i
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i += 1
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def parse_lst_instrs():
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global pinstrs
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for _, line in enumerate(lst_instrs):
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pinstrs.append(line.strip())
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#-------------------------------------------------------------------------------
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inc_depth = 0
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inc_depth_max = 16
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# Quickly goes through source file and resolves "include" directives ONLY
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def do_includes(fi):
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global inc_depth
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for _, line in enumerate(fi):
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line = line.rstrip()
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tok = line.split(None, 1)
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if len(tok) == 0:
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continue
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if tok[0] == "include":
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if len(tok) == 1:
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print("Missing parameter for include directive")
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leave(1)
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if tok[1][0] not in "'\"" or tok[1][-1] != tok[1][0]:
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print("Invalid format for include directive: {}".format(line))
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leave(1)
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inc = tok[1][1:-1]
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try:
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new_fi = open(inc, "r")
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except:
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print("Couldn't open file: {}".format(line))
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leave(1)
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inc_depth += 1
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if inc_depth >= inc_depth_max:
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print("Maximal include depth reached: {}".format(line))
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leave(1)
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source.write("$file: {}:\n".format(inc.replace(' ', '')))
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do_includes(new_fi)
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else:
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source.write("{}\n".format(line))
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inc_depth -= 1
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#-------------------------------------------------------------------------------
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def parse():
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global ptext
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global pcurfile
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global plastlabel
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source.seek(0)
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for ln_no, line in enumerate(source):
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line = line.rstrip()
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if len(line) == 0:
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continue
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# len("$file: ") == 7
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if len(line) > 7 and line[:7] == "$file: ":
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pcurfile = line[7:]
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continue
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quote = False
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for i in range(len(line)):
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if line[i] in "'\"":
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quote = not quote
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if line[i] in '#;@!/' and not quote:
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line = line[:i].rstrip()
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break
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if quote:
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print("Unterminated string in line: {}".format(line))
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leave(1)
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if len(line) == 0:
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continue
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if line[0] == ' ' or line[0] == '\t':
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line = line.lstrip()
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instrs.write(pcurfile + ' ')
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ptext += parse_instr(line)
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instrs.write("\n")
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continue
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# Preprocessor or label?
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if line[-1] == ':':
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if name_valid(line[:-1]):
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label = line[:-1]
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if label[0] == '.':
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label = plastlabel + label
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else:
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plastlabel = label
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plabels_text[label] = ptext
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else:
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print("Bad label name: {}".format(line[:-1]))
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leave(1)
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continue
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# Preprocessor, .data, or invalid
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parse_preproc(line)
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#-------------------------------------------------------------------------------
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escape_dict = {
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'n': '\n',
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't': '\t',
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'r': '\r',
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'v': '\v',
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'f': '\f',
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'"': '"',
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'\'': '\'',
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'\\': '\\',
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}
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def parse_preproc(line):
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global pdata
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tok = line.split(None, 2)
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# preprocessor
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if len(tok) > 1 and tok[1] == ':=':
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if len(tok) < 3:
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print("Invalid format: {}".format(line))
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leave(1)
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s = tok[0]
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if s in pdefs:
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s = pdefs[s]
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if s[0] == '.':
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s = plastlabel + s
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pdefs[s] = tok[2]
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return
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# .data
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if len(tok) > 1 and tok[1] == '=':
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if len(tok) < 3:
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print("Invalid format: {}".format(line))
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leave(1)
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label = tok[0]
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if label[0] == '.':
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label = plastlabel + label
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plabels_data[label] = pdata
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# number data
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if is_number(tok[2]):
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written = b_data.write(int(tok[2], base=0).to_bytes(8, byteorder='little', signed=False))
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assert(written == 8)
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pdata += written
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# buffer / bss
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elif tok[2][0] == '[':
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assert(tok[2][-1] == ']')
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s = tok[2][1:-1].strip()
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if s[0] == '.':
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s = plastlabel + s
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if s in pdefs:
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s = pdefs[s]
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if not is_number(s):
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print("Invalid bss format: {}".format(line))
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leave(1)
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i = int(s, base=0)
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if (i % 8) != 0:
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i = i + (8 - i % 8)
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written = b_data.write(bytearray(i))
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assert(written == i)
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pdata += written
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# string data
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elif tok[2][0] in "'\"":
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s = tok[2].strip()
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assert(s[-1] == tok[2][0])
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s = s[1:-1]
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real_len = 0
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escaping = False
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for c in s:
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# escape sequences
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if not escaping and c == '\\':
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escaping = True
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continue
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if escaping:
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escaping = False
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if c in escape_dict:
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c = escape_dict[c]
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else:
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print("Unrecognized escape sequence: {}".format(line))
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leave(1)
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b_data.write(ord(c).to_bytes(1, byteorder='little', signed=False))
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real_len += 1
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pdata += 1
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b_data.write(int(0).to_bytes(1, byteorder='little', signed=False))
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pdata += 1
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l = real_len + 1 # s + null-term
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# align
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if (l % 8) != 0:
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for i in range(8 - l % 8):
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written = b_data.write(int(0).to_bytes(1, byteorder='little', signed=False))
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pdata += 1
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pdefs[label + "_len"] = str(real_len)
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else:
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print("Invalid format: {}".format(line))
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leave(1)
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return
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print("Unrecognized directive: {}".format(line))
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leave(1)
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#-------------------------------------------------------------------------------
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pconds = {
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'c': 0b00001,
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'o': 0b00010,
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'z': 0b00011,
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'e': 0b00011,
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's': 0b00100,
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'p': 0b00101,
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'a': 0b00110,
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'ae': 0b00111,
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'b': 0b01000,
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'be': 0b01001,
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'g': 0b01010,
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'ge': 0b01011,
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'l': 0b01100,
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'le': 0b01101,
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'cxz': 0b01110,
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'cxnz': 0b11110,
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}
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def get_cond_mask(cond, line):
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mask = 0
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if cond[0] == 'n':
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cond = cond[1:]
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mask = 0b10000
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if cond not in pconds:
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print("Invalid condition suffix: {}".format(line))
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leave(1)
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return (mask | pconds[cond])
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#-------------------------------------------------------------------------------
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pfts = {
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"reg": 0b00001,
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"imm64": 0b00010,
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"bimm64": 0b00100,
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"brr": 0b00101,
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"brri": 0b00110,
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"brrii": 0b00111,
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"wimm64": 0b01000,
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"wrr": 0b01001,
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"wrri": 0b01010,
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"wrrii": 0b01011,
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"limm64": 0b01100,
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"lrr": 0b01101,
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"lrri": 0b01110,
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"lrrii": 0b01111,
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"qimm64": 0b10000,
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"qrr": 0b10001,
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"qrri": 0b10010,
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"qrrii": 0b10011,
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}
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def get_fts_mask(ft, line):
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if ft not in pfts:
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print("Invalid operand format ({}): {}".format(ft, line))
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else:
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return pfts[ft]
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#-------------------------------------------------------------------------------
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def parse_instr(line):
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if line == None or len(line) == 0:
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return 0
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tok = line.split(None, 1)
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instr = tok[0].strip()
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if len(tok) > 1:
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params = tok[1].strip()
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else:
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params = None
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fellthrough = False
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size = 4
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# Word 2 (rep|ft3|ft2|ft1)
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w2 = 0
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cond = None
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if len(instr) > 2 and '.' in instr:
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instr, suf = instr.split('.', 1)
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if len(instr) == 0:
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print("Missing instruction name before suffixes: {}".format(line))
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if len(suf) > 2 and suf[:3] == "rep":
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if len(suf) > 3:
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suf = suf[3:]
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if len(suf) > 0 and suf[0] == '.':
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suf = suf[1:]
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else:
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suf = ''
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w2 |= 0x8000 # REP
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if len(suf) > 0:
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instrs.write("%%cond ")
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cond = "%%imm16 {}".format(get_cond_mask(suf, line))
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instr_name = instr
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instr_args = ''
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if params == None or len(params) == 0:
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instrs.write("{} ".format(instr_name))
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if cond != None:
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size += 2
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instrs.write("{} ".format(cond))
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instrs.write("%%imm16 {}".format(w2))
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return size
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tok = params.split(',')
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# FTn
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fts = ''
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#
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# Parse operands, generating fts along the way
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#
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for word in tok:
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word = word.strip()
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instr_args += ' '
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gotPref = False
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if len(fts) != 0:
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fts += ' '
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if len(word) == 0:
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print("Wrong syntax in line: '{}'".format(line))
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leave(1)
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# local labels
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if word[0] == '.':
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word = plastlabel + word
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# preprocessor
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if word in pdefs:
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word = pdefs[word]
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# Fall through
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# arithmetic expressions
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word = arith_eval(word)
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# memory length prefixes
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if len(word) > 2 and '[' in word:
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if word[0] in 'bwlq':
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fts += word[0]
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gotPref = True
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else:
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print("Bad memory length prefix: {}".format(line))
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leave(1)
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word = word[1:].strip()
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assert(word[0] == '[')
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#
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# Determine memory format and save it into fts
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#
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if word[0] == '[':
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assert(word[-1] == ']')
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word = word[1:-1]
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# preprocessor, again
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if word in pdefs:
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word = pdefs[word]
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# Fall through
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#
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# Make sure we got an access length prefix
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#
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if not gotPref:
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print("Missing access length modifier: {}".format(line))
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leave(1)
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instr_name += "_m"
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# cheap way of getting [reg - imm] to work
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word = word.replace('-', '+ -')
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# remove every spaces!
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word = word.replace(' ', '')
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#
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# Offsets
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#
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if '+' in word:
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reg1 = "inv"
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reg2 = "inv"
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imm1 = '1'
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imm2 = '0'
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wtok = word.split('+')
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#
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# [reg] and [reg*imm16]
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#
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if len(wtok) == 1:
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if '*' in wtok[0]:
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assert(len(wtok[0].split('*')) == 2)
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reg2, imm1 = wtok[0].split('*', 1)
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else:
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reg1 = wtok[0]
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#
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# [reg+reg], [reg+imm16], [reg*imm16+imm16], [reg+reg*imm16]
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#
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elif len(wtok) == 2:
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# Must be [reg*imm16+imm16]
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if '*' in wtok[0]:
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assert(len(wtok[0].split('*')) == 2)
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assert(is_number(wtok[1].strip()))
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print(wtok)
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reg2, imm1 = wtok[0].split('*', 1)
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imm2 = wtok[1]
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# Must be [reg+reg*imm16]
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elif '*' in wtok[1]:
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assert(len(wtok[1].split('*')) == 2)
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reg1 = wtok[0]
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reg2, imm1 = wtok[1].split('*', 1)
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elif is_number(wtok[1].strip()):
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reg1 = wtok[0]
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imm2 = wtok[1]
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# Must be [reg+reg]
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else:
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reg1 = wtok[0]
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reg2 = wtok[1]
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#
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# [reg+reg+imm16], [reg+reg*imm16+imm16]
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#
|
|
else:
|
|
assert(len(wtok) == 3)
|
|
|
|
reg1 = wtok[0]
|
|
imm2 = wtok[2]
|
|
|
|
if '*' in wtok[1]:
|
|
assert(len(wtok[1].split('*')) == 2)
|
|
reg2, imm1 = wtok[1].split('*', 1)
|
|
|
|
else:
|
|
reg2 = wtok[1]
|
|
|
|
#
|
|
# Update fts and instr_args
|
|
#
|
|
|
|
instr_args += "{}:{} ".format(reg2, reg1)
|
|
size += 2
|
|
|
|
if imm1 == '1':
|
|
if imm2 == '0':
|
|
fts += 'rr'
|
|
else:
|
|
fts += 'rri'
|
|
size += 2
|
|
instr_args += "%%imm16 {}".format(imm2)
|
|
|
|
else:
|
|
size += 4
|
|
fts += 'rrii'
|
|
instr_args += "%%imm16 {} %%imm16 {}".format(imm1, imm2)
|
|
|
|
continue
|
|
|
|
#
|
|
# [imm64] or [reg]
|
|
#
|
|
else:
|
|
fellthrough = True
|
|
# FALLTHROUGH
|
|
|
|
# preprocessor, yet again
|
|
if word in pdefs:
|
|
word = pdefs[word]
|
|
# Fall through
|
|
|
|
# characters 'c'
|
|
if len(word) == 3 and word[0] == word[-1] == "'":
|
|
word = str(ord(word[1]))
|
|
|
|
# register index $reg
|
|
if len(word) == 4 and word[0] == '$':
|
|
if word[1:] in pregs:
|
|
word = str(pregs[word[1:]])
|
|
|
|
# for now every immediate is 64-bit
|
|
if is_number(word):
|
|
# +8 for immediate
|
|
size += 8
|
|
|
|
if not fellthrough:
|
|
instr_name += "_i"
|
|
|
|
fts += "imm64"
|
|
|
|
instr_args += "%%imm64 "
|
|
instr_args += word
|
|
|
|
fellthrough = False
|
|
continue
|
|
|
|
# register
|
|
if word in pregs:
|
|
size += 2
|
|
|
|
if not fellthrough:
|
|
instr_name += "_r"
|
|
fts += "reg"
|
|
|
|
else:
|
|
fts += "rr"
|
|
|
|
instr_args += word
|
|
fellthrough = False
|
|
continue
|
|
|
|
# it's a label (a 64-bit immediate)
|
|
# +8 for immediate
|
|
size += 8
|
|
|
|
if not fellthrough:
|
|
instr_name += "_i"
|
|
|
|
fts += "imm64"
|
|
instr_args += "%%imm64 "
|
|
|
|
if word[0] == '.':
|
|
instr_args += plastlabel
|
|
|
|
instr_args += word
|
|
fellthrough = False
|
|
|
|
#
|
|
# Compute FTn
|
|
#
|
|
l = len(fts.split())
|
|
|
|
if l == 3:
|
|
ft1, ft2, ft3 = fts.split()
|
|
|
|
w2 |= get_fts_mask(ft3, line) << 10
|
|
w2 |= get_fts_mask(ft2, line) << 5
|
|
w2 |= get_fts_mask(ft1, line)
|
|
|
|
elif l == 2:
|
|
ft1, ft2 = fts.split()
|
|
|
|
w2 |= get_fts_mask(ft2, line) << 5
|
|
w2 |= get_fts_mask(ft1, line)
|
|
|
|
else:
|
|
assert(l == 1)
|
|
w2 |= get_fts_mask(fts, line)
|
|
|
|
if cond == None:
|
|
instrs.write("{} %%imm16 {}{}".format(instr_name, w2, instr_args))
|
|
else:
|
|
size += 2
|
|
instrs.write("{} {} %%imm16 {}{}".format(instr_name, cond, w2, instr_args))
|
|
|
|
return size
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|
|
special_syms = {
|
|
"%%cond",
|
|
"%%imm16",
|
|
"%%imm32",
|
|
"%%imm64",
|
|
"%%signed",
|
|
}
|
|
|
|
def gentext():
|
|
text_start = start_addr
|
|
data_start = text_start + ptext
|
|
|
|
if (data_start % 8) != 0:
|
|
data_start += (8 - data_start % 8)
|
|
|
|
instrs.seek(0)
|
|
|
|
cond_mask = 0
|
|
|
|
for _, line in enumerate(instrs):
|
|
tok = line.strip().split()
|
|
|
|
if WANT_DISASM:
|
|
print(tok)
|
|
|
|
tok = tok[1:]
|
|
|
|
for word in tok:
|
|
if len(word) == 0:
|
|
continue
|
|
|
|
if word in pregs:
|
|
idx = pregs[word]
|
|
b_text.write(idx.to_bytes(2, byteorder='little', signed=False))
|
|
continue
|
|
|
|
if ':' in word:
|
|
if len(word.split(':')) < 2:
|
|
print("Stray ':' in line: {}".format(line))
|
|
leave(1)
|
|
|
|
reg2, reg1 = word.split(':', 1)
|
|
idx1 = pregs[reg1]
|
|
idx2 = pregs[reg2]
|
|
b_text.write(((idx1 << 8) | idx2).to_bytes(2, byteorder='little', signed=False))
|
|
continue
|
|
|
|
if word in pinstrs:
|
|
idx = pinstrs.index(word) | cond_mask
|
|
cond_mask = 0
|
|
b_text.write(idx.to_bytes(2, byteorder='little', signed=False))
|
|
continue
|
|
|
|
if word in plabels_text:
|
|
addr = text_start + plabels_text[word]
|
|
b_text.write(addr.to_bytes(8, byteorder='little', signed=False))
|
|
continue
|
|
|
|
if word in plabels_data:
|
|
addr = data_start + plabels_data[word]
|
|
b_text.write(addr.to_bytes(8, byteorder='little', signed=False))
|
|
continue
|
|
|
|
if word in special_syms:
|
|
if word == "%%imm16":
|
|
lastimm = 2
|
|
elif word == "%%imm32":
|
|
lastimm = 4
|
|
elif word == "%%imm64":
|
|
lastimm = 8
|
|
elif word == "%%cond":
|
|
cond_mask = (1 << 13)
|
|
elif word == "%%signed":
|
|
lastimm = 2
|
|
isSigned = True
|
|
else:
|
|
isSigned = False
|
|
continue
|
|
|
|
if is_number(word):
|
|
if word[0] == '-':
|
|
isSigned = True
|
|
else:
|
|
isSigned = False
|
|
b_text.write(int(word, base=0).to_bytes(lastimm, byteorder='little', signed=isSigned))
|
|
continue
|
|
|
|
print("Assembly error, unknown token '{}' in line: {}".format(word, line))
|
|
leave(1)
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|
|
def sort_by_list(dict_, list_):
|
|
for key in list_:
|
|
dict_.move_to_end(key)
|
|
|
|
def gensym():
|
|
text_start = start_addr
|
|
data_start = text_start + ptext
|
|
|
|
if (data_start % 8) != 0:
|
|
data_start += (8 - data_start % 8)
|
|
|
|
for label in plabels_text:
|
|
plabels_text[label] += text_start
|
|
|
|
for label in plabels_data:
|
|
plabels_data[label] += data_start
|
|
|
|
plabels_all = OrderedDict(list(plabels_text.items()) + list(plabels_data.items()))
|
|
|
|
for key, value in sorted(plabels_all.items(), key=lambda item: item[1]):
|
|
b_sym.write("{} {}\n".format(key, value))
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|
|
def genout():
|
|
b_text.seek(0)
|
|
b_data.seek(0)
|
|
b_out.write(b_text.read())
|
|
|
|
if (ptext % 8) != 0:
|
|
data_align = (8 - ptext % 8)
|
|
|
|
for i in range(data_align):
|
|
b_out.write(int(0).to_bytes(1, byteorder='little', signed=False))
|
|
|
|
b_out.write(b_data.read())
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|
|
parse_lst_instrs()
|
|
parse_lst_regs()
|
|
do_includes(main_src)
|
|
parse()
|
|
gentext()
|
|
genout()
|
|
gensym()
|
|
leave(0)
|
|
|