[Mono-devel-list] Re: Abcremoval

[Willibald Krenn]

 > No, AFAICT the index is treated as unsigned int32 (minus MSB):
 > shl    %eax	/* multiply by 2; clears top 32 bits on AMD64 IIRC;*/
 > /*no signed widening here*/
 > add    %rcx,%rax /*rcx is pointer to string; rax is index by two */
 > movzwq 0x14(%rax),%r14 /*copy*/
 >
 > IOW: There is no such thing as a negative index for string access.

This goes for AMD64 only; I did not check what x86 does. Probably you 
end up reading from kernel mem? However, you'd need a string of that 
length in the first place / or fool mono by changing the string length 
somehow.

Willi