https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219399
--- Comment #215 from Nils Beyer <[email protected]> --- (In reply to Don Lewis from comment #214) documentation is the keyword, I don't know; I only have this: ---------------------------------------------------------------------------- from: linux/v4.12/source/arch/x86/include/asm/processor.h - lines 791 and seq ---------------------------------------------------------------------------- #ifdef CONFIG_X86_32 [...] #else /* * User space process size. 47bits minus one guard page. The guard * page is necessary on Intel CPUs: if a SYSCALL instruction is at * the highest possible canonical userspace address, then that * syscall will enter the kernel with a non-canonical return * address, and SYSRET will explode dangerously. We avoid this * particular problem by preventing anything from being mapped * at the maximum canonical address. */ #define TASK_SIZE_MAX ((1UL << 47) - PAGE_SIZE) ---------------------------------------------------------------------------- do we have or need something similar? -- You are receiving this mail because: You are the assignee for the bug. _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "[email protected]"
