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# maybe - see what a program does before deciding whether you really want it to happen
#
# Copyright (c) 2016 Philipp Emanuel Weidmann <pew@worldwidemann.com>
#
# Nemo vir est qui mundum non reddat meliorem.
#
# Released under the terms of the GNU General Public License, version 3
# (https://gnu.org/licenses/gpl.html)
from blessings import Terminal
from ptrace.os_tools import RUNNING_LINUX
from ptrace.cpu_info import CPU_POWERPC, CPU_ARM, CPU_I386, CPU_X86_64
T = Terminal()
def format_permissions(permissions):
result = ""
for i in range(2, -1, -1):
result += "r" if permissions & (4 * 8**i) else "-"
result += "w" if permissions & (2 * 8**i) else "-"
result += "x" if permissions & (1 * 8**i) else "-"
return result
# Based on python-ptrace's PtraceSyscall.readSyscall
def get_syscall_register():
if CPU_POWERPC:
return "gpr0"
elif CPU_ARM:
return "r7"
elif RUNNING_LINUX:
if CPU_X86_64:
return "orig_rax"
else:
return "orig_eax"
else:
if CPU_X86_64:
return "rax"
else:
return "eax"
# Based on python-ptrace's PtraceSyscall.exit
def get_return_value_register():
if CPU_ARM:
return "r0"
elif CPU_I386:
return "eax"
elif CPU_X86_64:
return "rax"
elif CPU_POWERPC:
return "result"
else:
raise NotImplementedError("Unsupported CPU architecture")
SYSCALL_REGISTER = get_syscall_register()
RETURN_VALUE_REGISTER = get_return_value_register()
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