Messages in this thread | | | Date | Thu, 30 Oct 2014 07:30:28 -0400 | From | Steven Rostedt <> | Subject | Re: [PATCH] tracing/syscalls: ignore numbers outside NR_syscalls' range |
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On Thu, 30 Oct 2014 11:14:41 +0000 Russell King - ARM Linux <linux@arm.linux.org.uk> wrote:
> We have always had syscall number range of 0x900000 or so. The tracing > design does not expect that. Therefore, the tracing design did not take > account of ARM when it was created. Therefore, it's up to the tracing > people to decide how to properly fit their ill-designed subsystem into > one of the popular and well-established kernel architectures - or at > least suggest a way to work around this issue. >
Fine, lets define a MAX_SYSCALL_NR that is by default NR_syscalls, but an architecture can override it.
In trace_syscalls.c, where the checks are done, have this:
#ifndef MAX_SYSCALL_NR # define MAX_SYSCALL_NR NR_syscalls #endif
change all the checks to test against MAX_SYSCALL_NR instead of NR_syscalls.
Then in arch/arm/include/asm/syscall.h have:
#define MAX_SYSCALL_NR 0xa00000
or whatever would be the highest syscall number for ARM.
-- Steve
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