Re: Segfault on the i386 enter instruction

[Denis Vlasenko]

On Friday 12 May 2006 17:07, linux-os (Dick Johnson) wrote:
> > 	.file	"a.c"
> > 	.version	"01.01"
> > gcc2_compiled.:
> > .section	.rodata
> > .LC0:
> > 	.string	"asdf\n"
> > .text
> > 	.align 4
> > .globl main
> > 	.type	 main,@function
> > main:
> > 	enter $10008, $0
> > #	pushl %ebp
> > #	movl %esp,%ebp
> > #	subl $10008,%esp
> > 	addl $-12,%esp
>          ^^^^^^^^^^^^^^____________ WTF
>          adding a negative number is subtracting that positive value.
>          You just subtracted 0xfffffff3 (on a 32-bit machine) from
>          the stack pointer. It damn-well better seg-fault!

No. Try it yourself.
--
vda
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/