| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20070601231840.GA5024@flint.arm.linux.org.uk> Date: Sat, 2 Jun 2007 00:18:40 +0100 From: Russell King <rmk+lkml@....linux.org.uk> To: Deepak Saxena <dsaxena@...xity.net> Cc: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org Subject: Re: [PATCH RT] Fix NR_syscalls in ARM On Fri, Jun 01, 2007 at 04:10:53PM -0700, Deepak Saxena wrote: > The -rt patch adds a NR_syscalls symbol to the arm/unistd.h but > it is not the correct value as there are 348 syscalls on ARM > and the existing change sets the symbol to 322. > > Russell: Why isn't this in mainline? Other arches all seem to have > this symbol already defined. The hint is that it isn't in mainline; it's just plainly not required. It's also the wrong place to define it; it's not a property that unistd.h should concern itself with - it's a property of the kernel's branch table for calling the syscalls, and on ARM we calculate that number directly from the size of the kernel's branch table. It's also not just last_syscall_number+1 since the table is sized to make the assembly easy - iow, a number divisible by 4. So all in all, NR_syscalls in unistd.h is just utterly wrong. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists