def test_follow_jump_instructions_32():
buf = lltype.malloc(rffi.CCHARP.TO, 80, flavor='raw')
raw = rffi.cast(lltype.Signed, buf)
mc = codebuf.MachineCodeBlockWrapper(); mc.WORD = 4; mc.relocations = []
mc.RET()
mc.copy_to_raw_memory(raw)
mc = codebuf.MachineCodeBlockWrapper(); mc.WORD = 4; mc.relocations = []
assert follow_jump(raw) == raw
mc.JMP(imm(raw))
mc.copy_to_raw_memory(raw + 20)
assert buf[20] == '\xE9' # JMP
assert buf[21] == '\xE7' # -25
assert buf[22] == '\xFF'
assert buf[23] == '\xFF'
assert buf[24] == '\xFF'
mc = codebuf.MachineCodeBlockWrapper(); mc.WORD = 4; mc.relocations = []
assert follow_jump(raw + 20) == raw
mc.JMP(imm(raw))
mc.copy_to_raw_memory(raw + 40)
assert buf[40] == '\xE9' # JMP
assert buf[41] == '\xD3' # -45
assert buf[42] == '\xFF'
assert buf[43] == '\xFF'
assert buf[44] == '\xFF'
assert follow_jump(raw + 40) == raw
lltype.free(buf, flavor='raw')
def test_follow_jump_instructions_32():
buf = lltype.malloc(rffi.CCHARP.TO, 80, flavor='raw')
raw = rffi.cast(lltype.Signed, buf)
mc = Fake32CodeBlockWrapper(); mc.WORD = 4; mc.relocations = []
mc.RET()
mc.copy_to_raw_memory(raw)
mc = Fake32CodeBlockWrapper(); mc.WORD = 4; mc.relocations = []
assert follow_jump(raw) == raw
mc.JMP(imm(raw))
mc.copy_to_raw_memory(raw + 20)
assert buf[20] == '\xE9' # JMP
assert buf[21] == '\xE7' # -25
assert buf[22] == '\xFF'
assert buf[23] == '\xFF'
assert buf[24] == '\xFF'
mc = Fake32CodeBlockWrapper(); mc.WORD = 4; mc.relocations = []
assert follow_jump(raw + 20) == raw
mc.JMP(imm(raw))
mc.copy_to_raw_memory(raw + 40)
assert buf[40] == '\xE9' # JMP
assert buf[41] == '\xD3' # -45
assert buf[42] == '\xFF'
assert buf[43] == '\xFF'
assert buf[44] == '\xFF'
assert follow_jump(raw + 40) == raw
lltype.free(buf, flavor='raw')
def test_follow_jump_instructions_32():
buf = lltype.malloc(rffi.CCHARP.TO, 80, flavor='raw')
raw = rffi.cast(lltype.Signed, buf)
if not fits_in_32bits(raw):
lltype.free(buf, flavor='raw')
py.test.skip("not testable")
mc = Fake32CodeBlockWrapper()
mc.WORD = 4
mc.relocations = []
mc.RET()
mc.copy_to_raw_memory(raw)
mc = Fake32CodeBlockWrapper()
mc.WORD = 4
mc.relocations = []
assert follow_jump(raw) == raw
mc.JMP(imm(raw))
mc.copy_to_raw_memory(raw + 20)
assert buf[20] == '\xE9' # JMP
assert buf[21] == '\xE7' # -25
assert buf[22] == '\xFF'
assert buf[23] == '\xFF'
assert buf[24] == '\xFF'
mc = Fake32CodeBlockWrapper()
mc.WORD = 4
mc.relocations = []
assert follow_jump(raw + 20) == raw
mc.JMP(imm(raw))
mc.copy_to_raw_memory(raw + 40)
assert buf[40] == '\xE9' # JMP
assert buf[41] == '\xD3' # -45
assert buf[42] == '\xFF'
assert buf[43] == '\xFF'
assert buf[44] == '\xFF'
assert follow_jump(raw + 40) == raw
lltype.free(buf, flavor='raw')