[EMAIL PROTECTED] wrote:
Ben Laurie wrote:
In OpenSSL we overwrite with random gunk for this reason.
What? No compiler is smart enough to say, "The program
sets these variables but they are never referenced again.
I'll save time and not set them."
Sure it is, here's gcc -O3:
main()
{
int a=3;
}
becomes:
.file "xx.c"
.version "01.01"
gcc2_compiled.:
.text
.p2align 2,0x90
.globl main
.type main,@function
main:
pushl %ebp
movl %esp,%ebp
leave
ret
.Lfe1:
.size main,.Lfe1-main
.ident "GCC: (GNU) c 2.95.4 20020320 [FreeBSD]"
look, ma, no variables!
--
http://www.apache-ssl.org/ben.html http://www.thebunker.net/
"There is no limit to what a man can do or how far he can go if he
doesn't mind who gets the credit." - Robert Woodruff
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