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Update libc.py #1

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13100dc
Update libc.py
eqawasm Sep 3, 2022
706fc5a
Update libc.py
eqawasm Sep 5, 2022
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33 changes: 33 additions & 0 deletions tools/angr/plugins/hooks/libc.py
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Original file line number Diff line number Diff line change
Expand Up @@ -334,7 +334,37 @@ def run(self, dst, src, num):
max_len = src_len
self.inline_call(strncpy, dst + dst_len, src, max_len + 1, src_len=src_len)
return dst


class libc_setlocale(angr.SimProcedure):
locale = None
def run (self, category, locale):
if self.locale is None:
self.locale = self.inline_call(
angr.SIM_PROCEDURES["libc"]["malloc"], 256
).ret_expr
self.state.memory.store(self.locale + 255, b"\x00")
return self.locale

class libc_bindtextdomain(angr.SimProcedure):
domainname = None
def run (self, domainname, dirname):
if self.domainname is None:
self.domainname = self.inline_call(
angr.SIM_PROCEDURES["libc"]["malloc"], 256
).ret_expr
self.state.memory.store(self.domainname + 255, b"\x00")
return self.domainname

class libc_textdomain(angr.SimProcedure):
domainname = None
def run (self, domainname):
if self.domainname is None:
self.domainname = self.inline_call(
angr.SIM_PROCEDURES["libc"]["malloc"], 256
).ret_expr
self.state.memory.store(self.domainname + 255, b"\x00")
return self.domainname

libc_hooks = {
# Additional functions that angr doesn't provide hooks for
Expand All @@ -356,6 +386,9 @@ def run(self, dst, src, num):
"__snprintf_chk": libc__snprintf_chk,
"strncat": libc_strncat,
"strrchr": libc_strrchr,
"setlocale":libc_setlocale,
"bindtextdomain": libc_bindtextdomain,
"textdomain": libc_textdomain,
}

hook_condition = ("libc\.so.*", libc_hooks)
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