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zero out files

This commit is contained in:
George Hotz 2019-03-25 01:19:43 -07:00 committed by George Hotz
parent 5283df37e9
commit c6a24382f3
1 changed files with 4 additions and 2 deletions
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6
tracers/twilight/run.py
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@ -50,7 +50,9 @@ def shell_syscall(num, args, rip=stub_location):
exit(0)
# return rax
old_rip = regs.rip
assert os_ptrace(PTRACE_GETREGS, child, None, ctypes.pointer(regs)) == 0
assert (regs.rip-old_rip) == 2
return regs.rax
def shell_unmap(addr, endaddr):
@ -76,8 +78,6 @@ ok_segs = filter(lambda x: not
((x[0] <= stub_location and stub_location < x[1]) or
x[0] == 0xffffffffff600000), segs)
[shell_unmap(*x) for x in ok_segs]
#pmaps()
#exit(0)
# loading time
import cle
@ -116,6 +116,7 @@ def wrapped_mem_map(address, size, fd=None, prot=mmap.PROT_READ | mmap.PROT_WRIT
nm = b"/dev/shm/twilight-%x-%x" % (address, dsize)
fd = os.open(nm, os.O_CREAT | os.O_RDWR)
os.ftruncate(fd, 0)
os.ftruncate(fd, dsize)
# mmap in shell process
@ -226,6 +227,7 @@ def hook_syscall(mu, user_data):
mu.hook_add(UC_HOOK_INSN, hook_syscall, None, 1, 0, UC_X86_INS_SYSCALL)
# confirm munmap and mmap
#stub_location = 0x400001a3f7
#[shell_unmap(*x) for x in stub_segs]
print("shell process")
pmaps()