Hello, On 12/19/17 11:51, Anders Magnusson wrote: > Sounds good :-) > > Just a note here: > > about 15-20 years ago I did a test by removing the brk(2) syscall and > replacing its use > in malloc() by mmap(), and also add a libc wrapper for brk() that > mmap'ed MAXDSIZ/2 if ever called (as a fallback). > > This approach worked very well for everything tested _except_ emacs. > There were something in emacs dump logic that seemed to expect that > brk() were continuing just above bss, or something. > I didn't go deeper into this back then. > > Anyway, it might be an idea to revisit this. IMHO it would be really > nice if brk(2) could be declared obsolete :-)
Just as a heads up, I believe the FreeBSD folks went through this with their ARMv8 support and looking up the notes on their wiki, indeed, emacs was the fallout. https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=213862 Sevan
