789 lines
20 KiB
Python
Executable File
789 lines
20 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_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_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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# 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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pregs = {
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'$r0': 0, '$rax': 0, '$r1': 1, '$rbx': 1,
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'$r2': 2, '$rcx': 2, '$r3': 3, '$rdx': 3,
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'$r4': 4, '$rsi': 4, '$r5': 5, '$rdi': 5,
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'$r6': 6, '$ax0': 6, '$r7': 7, '$ax1': 7,
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'$r8': 8, '$ax2': 8, '$r9': 9, '$ax3': 9,
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'$r10': 10, '$ax4': 10, '$r11': 11, '$ax5': 11,
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'$r12': 12, '$nx0': 12, '$r13': 13, '$nx1': 13,
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'$r14': 14, '$nx2': 14, '$r15': 15, '$nx3': 15,
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'$r16': 16, '$nx4': 16, '$r17': 17, '$nx5': 17,
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'$r18': 18, '$nx6': 18, '$r19': 19, '$nx7': 19,
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'$r20': 20, '$nx8': 20, '$r21': 21, '$grp': 21,
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'$r22': 22, '$trp': 22, '$r23': 23, '$srp': 23,
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'$r24': 24, '$tmp': 24, '$r25': 25, '$rad': 25,
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'$r26': 26, '$cr0': 26, '$r27': 27, '$cr1': 27,
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'$r28': 28, '$rip': 28, '$r29': 29, '$rbp': 29,
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'$r30': 30, '$rsp': 30, '$r31': 31, '$zero': 31,
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}
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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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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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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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global pcurfile
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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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old_curf = pcurfile
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pcurfile = tok[1][1:-1]
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try:
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new_fi = open(pcurfile, "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(pcurfile.replace(' ', '')))
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do_includes(new_fi)
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pcurfile = old_curf
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source.write("$file: {}:\n".format(pcurfile.replace(' ', '')))
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else:
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source.write("{}\n".format(line))
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inc_depth -= 1
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#-------------------------------------------------------------------------------
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def parse():
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global ptext
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global pcurfile
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global plastlabel
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source.seek(0)
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pcurfile = sys.argv[1]
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for ln_no, line in enumerate(source):
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line = line.rstrip()
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if len(line) == 0:
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continue
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# len("$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 + ' ' + hex(ptext) + ' ')
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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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'0': '\0',
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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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fmts = {
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"r": 0b00000000,
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"m_r": 0b00100000,
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"m_rr": 0b01000000,
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"m_rriw": 0b01100000,
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"m_rrid": 0b10000000,
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"m_rrii": 0b10100000,
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"m_riq": 0b11000000,
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"imm8": 0b11100001,
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"imm16": 0b11100010,
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"imm32": 0b11100100,
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"imm64": 0b11101000,
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}
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pref2len = {
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"b" : 1,
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"w" : 2,
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"d" : 4,
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"l" : 4,
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"q" : 8,
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}
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i_aliases = {
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"inc_2" : "add_2",
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"dec_2" : "sub_2",
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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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size = 1
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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("{}_0".format(instr_name))
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return size
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tok = params.split(',')
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instr_name += "_{}".format(len(tok))
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if instr_name in i_aliases:
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instr_name = i_aliases[instr_name]
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#
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# Parse operands
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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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mlen = 0
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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 'bwldq':
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mlen = pref2len[word[0]]
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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
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#
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if word[0] in '[(':
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assert(word[-1] in '])')
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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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# Make sure we got an access length prefix
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if mlen == 0:
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print("Missing access length modifier: {}".format(line))
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leave(1)
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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 = "zero"
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reg2 = "zero"
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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*imm]
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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+imm], [reg*imm+imm], [reg+reg*imm]
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#
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elif len(wtok) == 2:
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# Must be [reg*imm+imm]
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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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reg2, imm1 = wtok[0].split('*', 1)
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imm2 = wtok[1]
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# Must be [reg+reg*imm]
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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+imm], [reg+reg*imm8+imm]
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#
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else:
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assert(len(wtok) == 3)
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reg1 = wtok[0]
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imm2 = wtok[2]
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if '*' in wtok[1]:
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assert(len(wtok[1].split('*')) == 2)
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reg2, imm1 = wtok[1].split('*', 1)
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else:
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reg2 = wtok[1]
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#
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# Update instr_args
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#
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if imm1 == '1':
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# [reg+reg]
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if imm2 == '0':
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instr_args += "%%imm8 {} {} {}".format(fmts["m_rr"]|mlen, '$'+reg1, '$'+reg2)
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size += 3
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# [reg+reg+imm]
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else:
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instr_args += "%%imm8 {} {} {} %%signed %%imm16 {}"\
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.format(fmts["m_rriw"]|mlen, '$'+reg1, '$'+reg2, imm2)
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size += 5
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# [reg+reg*imm+imm]
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else:
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instr_args += "%%imm8 {} {} {} %%imm8 {} %%signed %%imm32 {}"\
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.format(fmts["m_rrii"]|mlen, '$'+reg1, '$'+reg2, imm1, imm2)
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size += 8
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# [reg]
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elif '$'+word in pregs:
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instr_args += "%%imm8 {} {}".format(fmts["m_r"]|mlen, '$'+word)
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size += 2
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# [imm], converted to [zero+imm]
|
|
else:
|
|
instr_args += "%%imm8 {} $zero $zero %%signed %%imm32 {}".format(fmts["m_rrid"]|mlen, word)
|
|
size += 7
|
|
|
|
continue
|
|
|
|
# preprocessor, yet again
|
|
if word in pdefs:
|
|
word = pdefs[word]
|
|
# fallthrough
|
|
|
|
# characters 'c'
|
|
if len(word) == 3 and word[0] == word[-1] == "'":
|
|
word = str(ord(word[1]))
|
|
# fallthrough
|
|
|
|
# register index $reg
|
|
if len(word) == 4 and word[0] == '$':
|
|
if '$'+word[1:] in pregs:
|
|
word = str(pregs['$'+word[1:]])
|
|
# fallthrough
|
|
|
|
# immediates
|
|
if is_number(word):
|
|
n = int(word, base=0)
|
|
|
|
if n < 0 or n > 0xFFFFFFFF:
|
|
size += 9
|
|
instr_args += "%%imm8 {} ".format(fmts["imm64"])
|
|
instr_args += "%%imm64 {}".format(word)
|
|
|
|
elif n > 0xFFFF:
|
|
size += 5
|
|
instr_args += "%%imm8 {} ".format(fmts["imm32"])
|
|
instr_args += "%%imm32 {}".format(word)
|
|
|
|
elif n > 0xFF:
|
|
size += 3
|
|
instr_args += "%%imm8 {} ".format(fmts["imm16"])
|
|
instr_args += "%%imm16 {}".format(word)
|
|
|
|
else:
|
|
size += 2
|
|
instr_args += "%%imm8 {} ".format(fmts["imm8"])
|
|
instr_args += "%%imm8 {}".format(word)
|
|
|
|
continue
|
|
|
|
# register
|
|
elif '$'+word in pregs:
|
|
size += 1
|
|
instr_args += '$'+word
|
|
continue
|
|
|
|
# it's a label (a 32-bit immediate)
|
|
# ModRM + imm
|
|
size += 5
|
|
|
|
instr_args += "%%imm8 {} ".format(fmts["imm32"])
|
|
|
|
if word[0] == '.':
|
|
instr_args += plastlabel
|
|
|
|
instr_args += word
|
|
|
|
instrs.write("{}{}".format(instr_name, instr_args))
|
|
|
|
return size
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|
|
special_syms = {
|
|
"%%imm8",
|
|
"%%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)
|
|
|
|
for _, line in enumerate(instrs):
|
|
tok = line.strip().split()
|
|
|
|
if WANT_DISASM:
|
|
print(tok)
|
|
|
|
tok = tok[2:]
|
|
|
|
for word in tok:
|
|
if len(word) == 0:
|
|
continue
|
|
|
|
if word in pregs:
|
|
idx = pregs[word]
|
|
b_text.write(idx.to_bytes(1, byteorder='little', signed=False))
|
|
continue
|
|
|
|
if word in pinstrs:
|
|
idx = pinstrs.index(word)
|
|
b_text.write(idx.to_bytes(1, byteorder='little', signed=False))
|
|
continue
|
|
|
|
if word in plabels_text:
|
|
addr = text_start + plabels_text[word]
|
|
b_text.write(addr.to_bytes(4, byteorder='little', signed=False))
|
|
continue
|
|
|
|
if word in plabels_data:
|
|
addr = data_start + plabels_data[word]
|
|
b_text.write(addr.to_bytes(4, byteorder='little', signed=False))
|
|
continue
|
|
|
|
if word in special_syms:
|
|
if word == "%%imm8":
|
|
lastimm = 1
|
|
elif word == "%%imm16":
|
|
lastimm = 2
|
|
elif word == "%%imm32":
|
|
lastimm = 4
|
|
elif word == "%%imm64":
|
|
lastimm = 8
|
|
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()
|
|
do_includes(main_src)
|
|
parse()
|
|
gentext()
|
|
genout()
|
|
gensym()
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|
|
print("Finished producing {}\n\ttext section size: {} bytes\n\tdata section size: {} bytes\n" \
|
|
.format(sys.argv[3], ptext, pdata))
|
|
|
|
leave(0)
|
|
|
|
#-------------------------------------------------------------------------------
|
|
|