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What do linkers do?
...n/will "fix up" the addresses when the file is loaded (i.e., it'll add the base load address to each of those addresses so they all refer to the correct memory address).
Quite a few modern linkers can also carry out some (in a few cases a lot) of other "stuff", such as optimizing the code in ways t...
What is the advantage of GCC's __builtin_expect in if else statements?
...ect or not. On the other hand, the compiler can perform many optimizations based on the branch probability, such as organizing the code so the hot path is contiguous, moving code unlikely to be optimized further away or reducing its size, taking decisions about which branches to vectorize, better sc...
MySQL ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES)
...ful with this workaround. You may be allowing anonymous access to your database from any location. In case of doubt, I would rather delete the user.
– RandomSeed
Oct 3 '13 at 14:30
...
Obfuscated C Code Contest 2006. Please explain sykes2.c
...it.
Indenting:
main(_) {
_^448 && main(-~_);
putchar(--_%64
? 32 | -~7[__TIME__-_/8%8][">'txiZ^(~z?"-48] >> ";;;====~$::199"[_*2&8|_/64]/(_&2?1:8)%8&1
: 10);
}
Introducing variables to untangle this mess:
main(int i) {
if(i^448)
m...
cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术
... 28 HTT Multi-Threading
29 TM Thermal Monitor
30 IA64 IA64 Capabilities
31 PBE Pending Break Enable
ECX定义如下（资料来自Intel）：
bit Name Description
---------------------------------------------------------
00 SSE3 ...
Why does Javascript's regex.exec() not always return the same value? [duplicate]
... in a loop, you can stop it after a desired number of matches.
Here's a demonstration of a typical approach to using the regex in a loop. It takes advantage of the fact that exec returns null when there are no more matches by performing the assignment as the loop condition.
var re = /foo_(\d+)/g...
How to use underscore.js as a template engine?
...t;">
<!-- use %- to inject un-sanitized user input (see 'Demo of XSS hack') -->
<h3><%- item.name %></h3>
<p><%- item.interests %></p>
</td>
</tr>
<%
});
%>
&l...
How can I transform between the two styles of public key format, one “BEGIN RSA PUBLIC KEY”, the oth
...y();
echo $rsa->getPublicKey(CRYPT_RSA_PUBLIC_FORMAT_PKCS1_RAW);
The base64-encoded stuff appears to match even though the header says BEGIN PUBLIC KEY and not BEGIN RSA PUBLIC KEY. So maybe just use str_replace to fix that and you should be good to go!
...
What are the calling conventions for UNIX & Linux system calls (and user-space functions) on i386 an
...int $0x80
http://www.int80h.org/bsdasm/#default-calling-convention
x86-64 Linux System Call convention:
x86-64 Mac OS X is similar but different. TODO: check what *BSD does.
Refer to section: "A.2 AMD64 Linux Kernel Conventions" of System V Application Binary Interface AMD64 Architecture Proc...
Hashing a dictionary?
...nto nested tuples and make_hash_sha256() will also convert the repr() to a base64 encoded SHA256 hash.
import hashlib
import base64
def make_hash_sha256(o):
hasher = hashlib.sha256()
hasher.update(repr(make_hashable(o)).encode())
return base64.b64encode(hasher.digest()).decode()
def m...