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添加虚拟cpu

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This commit is contained in:
ranchuan
2024-12-03 19:41:01 +08:00
parent eaf0de74cc
commit 7c97a9595e
2 changed files with 105 additions and 24 deletions
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36
cpu.py Normal file
View File

@@ -0,0 +1,36 @@
def get_value(b:bytearray):
ret=0
for i,item in enumerate(b):
ret|=item<<(8*i)
return ret
def set_value(b:bytearray,value:int):
for i in range(len(b)):
b[i]=(value>>(8*i))&0xff
class cpu(object):
def __init__(self,rom_addr:int,rom_size:int,mem_addr:int,mem_size:int) -> None:
self.rom_addr=rom_addr
self.rom=bytearray(rom_size)
self.mem_addr=mem_addr
self.mem=bytearray(mem_size)
def get_value(self,addr:int,size:int):
if not (size in [1,2,4,8]):
raise Exception(f"CPU 异常 因为地址未对齐 {size}")
if(addr>=self.rom_addr) and (addr<self.rom_addr+len(self.rom)):
return get_value(self.rom[addr-self.rom_addr,addr-self.rom_addr+size])
def set_value(self,addr:int,size:int,value:int):
if not (size in [1,2,4,8]):
raise Exception(f"CPU 异常 因为地址未对齐 {size}")
if(addr>=self.rom_addr) and (addr<self.rom_addr+len(self.rom)):
set_value(self.rom[addr-self.rom_addr,addr-self.rom_addr+size],value)

93
node_run.py
View File

@@ -1,6 +1,6 @@
from copy import deepcopy
from cpu import cpu
from io import StringIO as string
@@ -46,13 +46,13 @@ class variable_type(object):
if("struct" in self.attr):
size=0
for item in self.member:
item_size=((item.get_size()+(self.pack-1))//self.pack)*self.pack
item_size=((item[0].get_size()+(self.pack-1))//self.pack)*self.pack
size+=item_size
return size
elif("union" in self.attr):
size=0
for item in self.member:
item_size=item.get_size()
item_size=item[0].get_size()
if(size<item_size):
size=item_size
return size
@@ -62,18 +62,39 @@ class variable_type(object):
return self.size
class variable(object):
def __init__(self,name:str,attr:variable_type,value=None):
def __init__(self,name:str,attr:variable_type,value:int):
self.name=name
self.value_=value
self.value_=value # 这个值是变量在内存中的首地址
self.attr=attr
def set_value(self,value):
if("const" in self.attr):
raise Exception(f"变量 {self.name} 不可写")
self.value_=value
def size(self):
return self.attr.get_size()
def value(self):
return self.value_
def member_value(self,member_stack:list[str]):
return self.value_
return self.value_,self.attr.get_size()
def member_value(self,member_stack:list[str]=[]):
off=0
deep=len(member_stack)
member=self.attr.member
index=0
member_index=0
member_len=len(member)
while index < deep:
while(member_index < member_len):
if(member[member_index][1]!=member_stack[index]):
off+=member[member_index][0].get_size()
member_index+=1
else:
index+=1
if(index==deep):
return self.value_+off,member[member_index][0].get_size()
member=member[member_index][0].member
member_index=0
member_len=len(member)
raise Exception(f"{self.name} 中不存在指定成员 {member_stack}")
return self.value()
class variable_alias(object):
@@ -83,7 +104,6 @@ class variable_alias(object):
class file(object):
def __init__(self):
self.stack:list[variable]=[]
self.variable_type_list:list[variable_type]=[
variable_type(["char"],1,(-128,127)),
variable_type(["short"],2,(-32768,32767)),
@@ -114,6 +134,9 @@ class file(object):
self.unname_struct_index=0
self.unname_union_index=0
self.unname_enum_index=0
self.cpu=cpu(0x1000_0000,1*1024*1024,0x2000_0000,1*1024*1024)
self.cpu_mem_ptr=0x2000_0000
self.stack:list[variable]=[]
def variable_type_check(self,attr:list[str]):
for item in self.variable_type_list:
if(item.eq(attr)):
@@ -190,33 +213,55 @@ class file(object):
if(len(attr)==1):
for item in self.variable_type_alias:
if(item.alias==attr[0]):
self.stack.append(variable(name,item.attr,value))
self.stack.append(variable(name,item.attr,self.cpu_mem_ptr))
self.cpu_mem_ptr+=item.attr.get_size()
return
for item in self.variable_type_list:
if(item.eq(attr)):
self.stack.append(variable(name,item,value))
self.stack.append(variable(name,item,self.cpu_mem_ptr))
self.cpu_mem_ptr+=item.get_size()
def modify_variable(self,name:str,value):
for item in self.stack:
if(item.name==name):
item.set_value(value)
addr,size=item.value()
cpu.set_value(addr,size,value)
return
raise Exception(f"符号名称不存在 {name}")
def __str__(self) -> str:
print("变量类型")
for item in self.variable_type_list:
print(f"\t{item.attr}")
print("变量别名")
for item in self.variable_type_alias:
print(f"\t{item.attr.attr} eq {item.alias}")
print("变量栈")
def get_variable(self,name:str,member_stack:list[str]=[]):
for item in self.stack:
print(f"\t{item.attr.attr} {item.name}={item.value()}")
return ""
if(item.name==name):
addr,size=item.member_value(member_stack)
print(f"addr={addr},size={size}")
return
def __str__(self) -> str:
ret=string()
ret.write("变量类型\n")
for item in self.variable_type_list:
ret.write(f"\t{item.attr}\n")
ret.write("变量别名\n")
for item in self.variable_type_alias:
ret.write(f"\t{item.attr.attr} eq {item.alias}\n")
ret.write("变量栈\n")
for item in self.stack:
addr,size=item.value()
ret.write(f"\t{item.attr.attr} {item.name}={hex(addr)},{size}\n")
ret_str=ret.getvalue()
ret.close()
return ret_str
if __name__ == "__main__":
f=file()
f.add_enum_type("enum1",[("ENUM0",0),("ENUM1",1)])
f.add_struct_type(4,"struct1",[(f.get_variable_type(['int']),'a')])
f.add_struct_type(4,"struct1",[
(f.get_variable_type(['int']),'a'),
(f.get_variable_type(['int']),'b'),
])
f.add_type_alias(['unsigned','char'],'uint8_t')
f.add_variable(['unsigned','char'],'char_a',120)
f.add_variable(['uint8_t'],'char_b',100)
f.add_variable(['struct',"struct1"],'struct_a')
f.get_variable("struct_a")
f.get_variable("struct_a",['a'])
f.get_variable("struct_a",['b'])
print(f)