mirror of
https://gitlab.os-k.eu/os-k-team/kvisc.git
synced 2023-08-25 14:05:46 +02:00
440 lines
11 KiB
Python
Executable File
440 lines
11 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 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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if len(sys.argv) != 4:
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print("Usage: {} (output file) (memory entry point) (source file)"
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.format(sys.argv[0]))
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sys.exit(1)
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instrs = open(".{}.instr".format(sys.argv[3]), "w+")
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b_data = open(".{}.data".format(sys.argv[3]), "w+b")
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b_text = open(".{}.text".format(sys.argv[3]), "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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fi = open(sys.argv[1])
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b_out = open(sys.argv[3], "wb")
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start_addr = int(sys.argv[2], base=0)
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def leave():
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fi.close()
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instrs.close()
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b_out.close()
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b_data.close()
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b_text.close()
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lst_regs.close()
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lst_instrs.close()
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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 = list()
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# instructions
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pinstrs = list()
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# labels
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plabels_text = dict()
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plabels_data = dict()
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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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# after parse() is done, pdata and ptext are never modified
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# padding bytes between .text and .data
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pdata_pad = 0
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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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print("BAD '{}'".format(c))
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return False
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return True
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#-------------------------------------------------------------------------------
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def parse_lst_regs():
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global pregs
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for _, line in enumerate(lst_regs):
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pregs.append(line.strip())
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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 parse_preproc(line):
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global pdata
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tok = line.split(' ', 2)
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#for word in tok:
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# if not name_valid(word):
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# print("Invalid token in line: {}".format(line))
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# return
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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()
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sys.exit(1)
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pdefs[tok[0]] = 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()
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sys.exit(1)
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if is_number(tok[2]):
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plabels_data[tok[0]] = pdata
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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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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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plabels_data[tok[0]] = pdata
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pdefs[tok[0] + "_len"] = str(len(s))
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for c in s:
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written = b_data.write(ord(c).to_bytes(1, byteorder='little', signed=False))
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assert(written == 1)
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pdata += 1
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# align
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for i in range(8 - len(s) % 8):
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written = b_data.write(int(0).to_bytes(1, byteorder='little', signed=False))
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assert(written == 1)
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pdata += 1
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else:
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print("Invalid format: {}".format(line))
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leave()
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sys.exit(1)
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return
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print("Unrecognized directive: {}".format(line))
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#-------------------------------------------------------------------------------
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def apply_pdefs(line):
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tok = line.split(' ')
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new = '' + tok[0]
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if len(tok) > 3:
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print("Too many tokens in line: {}".format(line))
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return False, None
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# 'mov rax, rax' => 'mov rax rax'
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if len(tok) == 3 and tok[1][-1] == ',':
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tok[1] = tok[1][:-1]
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for word in tok[1:]:
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new += ' '
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if word[0] == '[':
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assert(word[-1] == ']')
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new += '['
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word = word[1:-1]
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need_bracket = True
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else:
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need_bracket = False
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if word in pdefs:
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word = pdefs[word]
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if not name_valid(word):
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print("Invalid token in line: {}".format(line))
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return False, None
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new += word
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if need_bracket:
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new += ']'
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return True, new
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def parse():
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global ptext
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for count, line in enumerate(fi):
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line = line.rstrip()
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if len(line) == 0:
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continue
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if line[0] == '#' or 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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if line[0] in '#;@!/':
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continue
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ok, line = apply_pdefs(line)
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if ok:
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# instrs.write("{} ".format(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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plabels_text[line[:-1]] = ptext
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else:
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print("Bad label name: {}".format(line[:-1]))
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leave()
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sys.exit(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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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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def parse_instr(line):
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# instrs.write(hex(ptext))
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tok = line.split(' ')
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fellthrough = False
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size = 2
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if tok[0] == "rep":
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instrs.write("%rep ")
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tok = tok[1:]
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size += 2
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instr_name = tok[0]
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instr_args = ''
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if len(tok) == 1:
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instrs.write("{}".format(instr_name))
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return 2 # instruction
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tok = tok[1:]
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for word in tok:
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instr_args += ' '
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pref = None
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# memory length prefixes
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if len(word) > 1 and word[1] == '[':
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if word[0] == 'b':
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pref = "%b"
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elif word[0] == 'w':
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pref = "%w"
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elif word[0] == 'l' or word[0] == 'd':
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pref = "%l"
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elif word[0] == 'q':
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pref = "%q"
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else:
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print("Bad memory length prefix")
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leave()
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sys.exit(1)
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word = word[1:]
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# [reg+off] or [imm64]
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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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if pref == None:
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print("Missing access length modifier: {}".format(line))
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leave()
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sys.exit(1)
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instr_name += "_m"
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instr_args += "{}".format(pref)
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if '+' in word:
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# +2 for A_OFF, +2 for offset, +2 for register
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size += 2 + 2 + 2
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instr_args += "off "
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assert(len(word) > 3)
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reg, off = word.strip().split('+', 1)
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reg = reg.strip()
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off = off.strip()
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print(reg)
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print(off)
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instr_args += "{} {}".format(off, reg)
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continue
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else:
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# +2 for A_MEM
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size += 2
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instr_args += "mem "
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fellthrough = True
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# FALLTHROUGH
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# for now every immediate is 64-bit
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if is_number(word):
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# +2 for A_IMM64, +8 for immediate
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size += 2 + 8
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if not fellthrough:
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instr_name += "_i"
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instr_args += "%imm64 "
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instr_args += word
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fellthrough = False
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continue
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if word in pregs:
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size += 2
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if not fellthrough:
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instr_name += "_r"
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instr_args += word
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fellthrough = False
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continue
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# it's a label (a 64-bit immediate)
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# +2 for A_IMM64, +8 for immediate
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size += 2 + 8
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if not fellthrough:
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instr_name += "_i"
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instr_args += "%imm64 "
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instr_args += word
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fellthrough = False
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instrs.write("{}{}".format(instr_name, instr_args))
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return size
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#-------------------------------------------------------------------------------
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special_syms = {
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"%bmem": 0x7001,
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"%wmem": 0x7002,
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"%lmem": 0x7004,
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"%qmem": 0x7008,
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"%boff": 0x7701,
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"%woff": 0x7702,
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"%loff": 0x7704,
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"%qoff": 0x7708,
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"%imm16": 0x7772,
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"%imm32": 0x7774,
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"%imm64": 0x7778,
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"%rep": 0x8000
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}
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def gentext():
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instrs.seek(0)
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text_start = 0 # 0x100000
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data_start = text_start + ptext
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data_start += (8 - data_start % 8)
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for _, line in enumerate(instrs):
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tok = line.strip().split(' ')
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for word in tok:
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if word in pregs:
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idx = pregs.index(word)
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b_text.write(idx.to_bytes(2, byteorder='little', signed=False))
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continue
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if word in pinstrs:
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idx = pinstrs.index(word)
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b_text.write(idx.to_bytes(2, byteorder='little', signed=False))
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continue
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if word in plabels_text:
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addr = text_start + plabels_text[word]
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b_text.write(addr.to_bytes(8, byteorder='little', signed=False))
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continue
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if word in plabels_data:
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addr = data_start + plabels_data[word] + pdata_pad
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b_text.write(addr.to_bytes(8, byteorder='little', signed=False))
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continue
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if word in special_syms:
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if word == "%imm16":
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lastimm = 2
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elif word == "%imm32":
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lastimm = 4
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elif word == "%imm64":
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lastimm = 8
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elif word[2:] == "off" and word[0] == '%':
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lastimm = 2
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b_text.write(special_syms[word].to_bytes(2, byteorder='little', signed=False))
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continue
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if is_number(word):
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b_text.write(int(word, base=0).to_bytes(lastimm, byteorder='little', signed=False))
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continue
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print("Assembly error, unknown token '{}' in line: {}".format(word, line))
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leave()
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sys.exit(1)
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#-------------------------------------------------------------------------------
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def genout():
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b_text.seek(0)
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b_data.seek(0)
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b_out.write(b_text.read())
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data_align = (8 - ptext % 8)
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for i in range(data_align):
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b_out.write(int(0).to_bytes(1, byteorder='little', signed=False))
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b_out.write(b_data.read())
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#-------------------------------------------------------------------------------
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parse_lst_instrs()
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parse_lst_regs()
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parse()
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gentext()
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genout()
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leave()
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