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#!/usr/bin/env python
import os
from rpython.tool.udir import udir
class Asseumbler(object):
asm_opts = '-march=rv64imafd'
body = """
.section .text
.global _start
.global main
_start:
jal ra, main
ebreak # begin_tag
ebreak # begin_tag
ebreak # begin_tag
ebreak # begin_tag
main:
%s
jr ra # end_tag
ebreak # end_tag
ebreak # end_tag
ebreak # end_tag
"""
begin_tag = '\x73\x00\x10\x00' * 4
end_tag = '\x67\x80\x00\x00' + '\x73\x00\x10\x00' * 3
base_name = 'test_%d.asm'
index = 0
def __init__(self, instr):
self.instr = instr
self.file = udir.join(self.base_name % self.index)
while self.file.check():
self.index += 1
self.file = udir.join(self.base_name % self.index)
def extract(self):
f = open("%s/a.out" % udir, 'rb')
data = f.read()
f.close()
begin_pos = data.find(self.begin_tag)
assert begin_pos >= 0
begin_pos += len(self.begin_tag)
end_pos = data.find(self.end_tag, begin_pos)
assert end_pos >= 0
return data[begin_pos:end_pos]
def assemble(self, *args):
res = self.body % (self.instr)
self.file.write(res)
os.system("as --fatal-warnings %s %s -o %s/a.out" %
(self.asm_opts, self.file, udir))
def assemble(instr):
a = Asseumbler(instr)
a.assemble(instr)
return a.extract()
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