Re: [regression v2.6.38] Re: [PATCH v2] brk: fix min_brk lower bound computation for COMPAT_BRK

[Andreas Schwab]

Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> writes:

> Seems like the binary doesn't like brk() rounding up the requested
> value to the next page...

>From libc-5.4.46/libc/sysdeps/linux/m68k/__sbrk.c:

void *
__sbrk(ptrdiff_t increment)
{
    if (__init_brk () == 0)
    {
	register void * tmp asm ("%d1") = ___brk_addr+increment;
	__asm__ volatile ("movel %1,%/d0\n\t"
			  "trap  #0\n\t"
			  "movel %/d0,%0"
		:"=g" (___brk_addr)
		:"i" (SYS_brk),"g" (tmp) : "%d0");
	if (___brk_addr == tmp)
		return tmp-increment;
	errno = ENOMEM;
    }
    return ((void *) -1);
}

Andreas.

-- 
Andreas Schwab, schwab@xxxxxxxxxxxxxx
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