mirror of
https://github.com/AsahiLinux/m1n1
synced 2024-11-23 23:23:02 +00:00
88 lines
2.5 KiB
Python
Executable file
88 lines
2.5 KiB
Python
Executable file
#!/usr/bin/env python3
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import os, tempfile, shutil, subprocess
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class AsmException(Exception):
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pass
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class BaseAsm(object):
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def __init__(self, source, addr = 0):
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self.source = source
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self._tmp = tempfile.mkdtemp() + os.sep
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self.addr = addr
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self.compile(source)
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def compile(self, source):
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self.sfile = self._tmp + "b.S"
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with open(self.sfile, "w") as fd:
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fd.write(self.HEADER + "\n")
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fd.write(source + "\n")
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fd.write(self.FOOTER + "\n")
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self.elffile = self._tmp + "b.elf"
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self.bfile = self._tmp + "b.b"
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self.nfile = self._tmp + "b.n"
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subprocess.check_call("%sgcc %s -Ttext=0x%x -o %s %s" % (self.PREFIX, self.CFLAGS, self.addr, self.elffile, self.sfile), shell=True)
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subprocess.check_call("%sobjcopy -j.text -O binary %s %s" % (self.PREFIX, self.elffile, self.bfile), shell=True)
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subprocess.check_call("%snm %s > %s" % (self.PREFIX, self.elffile, self.nfile), shell=True)
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with open(self.bfile, "rb") as fd:
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self.data = fd.read()
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with open(self.nfile) as fd:
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for line in fd:
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line = line.replace("\n", "")
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addr, type, name = line.split()
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addr = int(addr, 16)
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setattr(self, name, addr)
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self.start = self._start
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self.len = len(self.data)
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self.end = self.start + self.len
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def objdump(self):
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subprocess.check_call("%sobjdump -rd %s" % (self.PREFIX, self.elffile), shell=True)
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def disassemble(self):
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output = subprocess.check_output("%sobjdump -zd %s" % (self.PREFIX, self.elffile), shell=True).decode("ascii")
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disas = []
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for line in output.split("\n"):
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if not line or line[0] != " ":
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continue
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yield line
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def __del__(self):
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if self._tmp:
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shutil.rmtree(self._tmp)
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self._tmp = None
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class ARMAsm(BaseAsm):
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PREFIX = os.path.join(os.environ.get("ARCH", "aarch64-linux-gnu-"))
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CFLAGS = "-pipe -Wall -nostartfiles -nodefaultlibs -march=armv8.2-a"
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HEADER = """
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.text
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.globl _start
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_start:
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"""
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FOOTER = """
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.pool
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"""
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if __name__ == "__main__":
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import sys
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code = """
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ldr x0, =0xDEADBEEF
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b test
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mrs x0, spsel
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svc 1
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%s
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test:
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b test
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ret
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""" % (" ".join(sys.argv[1:]))
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c = ARMAsm(code, 0x1238)
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c.objdump()
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assert c.start == 0x1238
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assert c.test == 0x1240
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