def find(cls, mem, addr, size, only_first=True, mem_cache=True):
"""scan a memory region for resident structures and return the residents.
if 'only_first' is set return a single instance or None.
otherwise a list of Resident objects.
"""
# use a memory cache to speed up search
if mem_cache:
memc = MemoryCache(addr, size)
memc.read_cache(mem)
mem = memc
# start search
end_addr = addr + size
finds = []
while addr < end_addr:
# look for match word
mw = mem.r16(addr)
if mw == cls.RTC_MATCHWORD:
# check pointer
ptr = mem.r32(addr + 2)
if ptr == addr:
# yes its a resident...
if only_first:
return cls(mem, addr)
finds.append(cls(mem, addr))
# read end skip
addr = mem.r32(addr + 6)
addr += 2
# nothing found for single match:
if only_first:
return None
return finds
def mem_cache_rwx_read_test(): mem = MockMemory() # build main mem contents mem.w8(0x100, 42) assert mem.r8(0x100) == 42 mem.w16(0x200, 0xdead) assert mem.r16(0x200) == 0xdead mem.w32(0x300, 0xcafebabe) assert mem.r32(0x300) == 0xcafebabe mem.write(0, 0x101, 43) assert mem.read(0, 0x101) == 43 mem.write(1, 0x202, 0x1234) assert mem.read(1, 0x202) == 0x1234 mem.write(2, 0x304, 0x11223344) assert mem.read(2, 0x304) == 0x11223344 # write to cache cmem = MemoryCache(0x100, 0x210) cmem.read_cache(mem) # check cache mem assert cmem.r8(0x100) == 42 assert cmem.r16(0x200) == 0xdead assert cmem.r32(0x300) == 0xcafebabe assert cmem.read(0, 0x101) == 43 assert cmem.read(1, 0x202) == 0x1234 assert cmem.read(2, 0x304) == 0x11223344
def mem_cache_rwxs_read_test(): mem = MockMemory() # build main mem contents mem.w8s(0x100, -42) assert mem.r8s(0x100) == -42 mem.w16s(0x200, -0x1ead) assert mem.r16s(0x200) == -0x1ead mem.w32s(0x300, -0x2afebabe) assert mem.r32s(0x300) == -0x2afebabe mem.writes(0, 0x101, -43) assert mem.reads(0, 0x101) == -43 mem.writes(1, 0x202, -0x1234) assert mem.reads(1, 0x202) == -0x1234 mem.writes(2, 0x304, -0x11223344) assert mem.reads(2, 0x304) == -0x11223344 # write to cache cmem = MemoryCache(0x100, 0x210) cmem.read_cache(mem) # check cache mem assert cmem.r8s(0x100) == -42 assert cmem.r16s(0x200) == -0x1ead assert cmem.r32s(0x300) == -0x2afebabe assert cmem.reads(0, 0x101) == -43 assert cmem.reads(1, 0x202) == -0x1234 assert cmem.reads(2, 0x304) == -0x11223344
def mem_cache_rwxs_read_test():
mem = MockMemory()
# build main mem contents
mem.w8s(0x100, -42)
assert mem.r8s(0x100) == -42
mem.w16s(0x200, -0x1ead)
assert mem.r16s(0x200) == -0x1ead
mem.w32s(0x300, -0x2afebabe)
assert mem.r32s(0x300) == -0x2afebabe
mem.writes(0, 0x101, -43)
assert mem.reads(0, 0x101) == -43
mem.writes(1, 0x202, -0x1234)
assert mem.reads(1, 0x202) == -0x1234
mem.writes(2, 0x304, -0x11223344)
assert mem.reads(2, 0x304) == -0x11223344
# write to cache
cmem = MemoryCache(0x100, 0x210)
cmem.read_cache(mem)
# check cache mem
assert cmem.r8s(0x100) == -42
assert cmem.r16s(0x200) == -0x1ead
assert cmem.r32s(0x300) == -0x2afebabe
assert cmem.reads(0, 0x101) == -43
assert cmem.reads(1, 0x202) == -0x1234
assert cmem.reads(2, 0x304) == -0x11223344
def mem_cache_rwx_read_test():
mem = MockMemory()
# build main mem contents
mem.w8(0x100, 42)
assert mem.r8(0x100) == 42
mem.w16(0x200, 0xdead)
assert mem.r16(0x200) == 0xdead
mem.w32(0x300, 0xcafebabe)
assert mem.r32(0x300) == 0xcafebabe
mem.write(0, 0x101, 43)
assert mem.read(0, 0x101) == 43
mem.write(1, 0x202, 0x1234)
assert mem.read(1, 0x202) == 0x1234
mem.write(2, 0x304, 0x11223344)
assert mem.read(2, 0x304) == 0x11223344
# write to cache
cmem = MemoryCache(0x100, 0x210)
cmem.read_cache(mem)
# check cache mem
assert cmem.r8(0x100) == 42
assert cmem.r16(0x200) == 0xdead
assert cmem.r32(0x300) == 0xcafebabe
assert cmem.read(0, 0x101) == 43
assert cmem.read(1, 0x202) == 0x1234
assert cmem.read(2, 0x304) == 0x11223344
def find(cls, mem, addr, size, only_first=True, mem_cache=True):
"""scan a memory region for resident structures and return the residents.
if 'only_first' is set return a single instance or None.
otherwise a list of Resident objects.
"""
# use a memory cache to speed up search
if mem_cache:
memc = MemoryCache(addr, size)
memc.read_cache(mem)
mem = memc
# start search
end_addr = addr + size
finds = []
while addr < end_addr:
# look for match word
mw = mem.r16(addr)
if mw == cls.RTC_MATCHWORD:
# check pointer
ptr = mem.r32(addr + 2)
if ptr == addr:
# yes its a resident...
if only_first:
return cls(mem, addr)
finds.append(cls(mem, addr))
# read end skip
addr = mem.r32(addr + 6)
addr += 2
# nothing found for single match:
if only_first:
return None
return finds
def mem_cache_cstr_read_test(): mem = MockMemory() data = "hello, world" mem.w_cstr(0x100, data) assert mem.r_cstr(0x100) == data empty = "" mem.w_cstr(0x120, empty) assert mem.r_cstr(0x120) == empty # to cache cmem = MemoryCache(0x100, 0x100) cmem.read_cache(mem) assert cmem.r_cstr(0x100) == data assert cmem.r_cstr(0x120) == empty
def mem_cache_cstr_read_test():
mem = MockMemory()
data = "hello, world"
mem.w_cstr(0x100, data)
assert mem.r_cstr(0x100) == data
empty = ""
mem.w_cstr(0x120, empty)
assert mem.r_cstr(0x120) == empty
# to cache
cmem = MemoryCache(0x100, 0x100)
cmem.read_cache(mem)
assert cmem.r_cstr(0x100) == data
assert cmem.r_cstr(0x120) == empty
def mem_cache_block_read_test(): mem = MockMemory() data = "hello, world!" mem.w_block(0x100, data) assert mem.r_block(0x100, len(data)) == data bdata = bytearray(data) mem.w_block(0x180, bdata) assert mem.r_block(0x180, len(bdata)) == bdata mem.clear_block(0x200, 100, 42) assert mem.r_block(0x200, 100) == chr(42) * 100 mem.copy_block(0x200, 0x300, 20) assert mem.r_block(0x300, 21) == chr(42) * 20 + chr(0) # write to main mem cmem = MemoryCache(0x100, 0x220) cmem.read_cache(mem) assert cmem.r_block(0x100, len(data)) == data assert cmem.r_block(0x180, len(bdata)) == bdata assert cmem.r_block(0x200, 100) == chr(42) * 100 assert cmem.r_block(0x300, 21) == chr(42) * 20 + chr(0)
def mem_cache_block_read_test():
mem = MockMemory()
data = "hello, world!"
mem.w_block(0x100, data)
assert mem.r_block(0x100, len(data)) == data
bdata = bytearray(data)
mem.w_block(0x180, bdata)
assert mem.r_block(0x180, len(bdata)) == bdata
mem.clear_block(0x200, 100, 42)
assert mem.r_block(0x200, 100) == chr(42) * 100
mem.copy_block(0x200, 0x300, 20)
assert mem.r_block(0x300, 21) == chr(42) * 20 + chr(0)
# write to main mem
cmem = MemoryCache(0x100, 0x220)
cmem.read_cache(mem)
assert cmem.r_block(0x100, len(data)) == data
assert cmem.r_block(0x180, len(bdata)) == bdata
assert cmem.r_block(0x200, 100) == chr(42) * 100
assert cmem.r_block(0x300, 21) == chr(42) * 20 + chr(0)