On Mon, Apr 22, 2019 at 11:13:30AM +0800, 张忠山 wrote: > Recently, I'm using barebox in a deep embedded project, and need some funtctions > in libc/libm, So I linked barebox with newlib > > But whenever newlib call sbrk with negtive `increment`, barebox crash. > > The reason is sbrk clean memory region using `increment`. > > Why sbrk must clear the increased memory region? sbrk is used only for dlmalloc in barebox. AFAIK the dlmalloc implementation needs the memory cleared. Also dlmalloxc probably never calls sbrk with a negative increment, so this was never an issue. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
