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| author | Aymeric Vincent <aymeric.vincent@cea.fr> | 2018-02-16 15:09:43 +0100 |
|---|---|---|
| committer | Aymeric Vincent <aymeric.vincent@cea.fr> | 2018-02-16 15:09:43 +0100 |
| commit | 3c2762428f2730608cf624a02660d97c9a13c152 (patch) | |
| tree | c44d3109479c33b1f66f4b9abd50da32bcdb8d89 | |
| parent | e933c0c31742ddb9dcfd9b46d93fe2a47553af5e (diff) | |
| download | miasm-3c2762428f2730608cf624a02660d97c9a13c152.tar.gz miasm-3c2762428f2730608cf624a02660d97c9a13c152.zip | |
Align the arbitrary addresses of fake library functions to multiples of 4
Most processors can execute code only at aligned addresses, and some enforce this in their instruction set, e.g. powerpc. Without this patch, the addresses generated in the PLT will be truncated by the calling instruction and will thus not hit the breakpoint intended to catch them.
| -rw-r--r-- | miasm2/jitter/loader/utils.py | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/miasm2/jitter/loader/utils.py b/miasm2/jitter/loader/utils.py index 434e5f7e..a3a0ecd1 100644 --- a/miasm2/jitter/loader/utils.py +++ b/miasm2/jitter/loader/utils.py @@ -43,7 +43,7 @@ class libimp(object): log.warning("Create dummy entry for %r", name) self.fake_libs.add(name) self.name2off[name] = ad - self.libbase2lastad[ad] = ad + 0x1 + self.libbase2lastad[ad] = ad + 0x4 self.lib_imp2ad[ad] = {} self.lib_imp2dstad[ad] = {} self.libbase_ad += 0x1000 @@ -67,7 +67,7 @@ class libimp(object): return self.lib_imp2ad[libad][imp_ord_or_name] # log.debug('new imp %s %s' % (imp_ord_or_name, dst_ad)) ad = self.libbase2lastad[libad] - self.libbase2lastad[libad] += 0x11 # arbitrary + self.libbase2lastad[libad] += 0x10 # arbitrary self.lib_imp2ad[libad][imp_ord_or_name] = ad name_inv = dict([(x[1], x[0]) for x in self.name2off.items()]) |