linux-kernel - Re: [PATCH 00/12] tracing: add compat syscall support v2

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Message-ID: <20100310032539.GA10074@nowhere>
Date:	Wed, 10 Mar 2010 04:25:41 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Jason Baron <jbaron@...hat.com>
Cc:	mingo@...e.hu, rostedt@...dmis.org, linux-kernel@...r.kernel.org,
	laijs@...fujitsu.com, lizf@...fujitsu.com, hpa@...or.com,
	tglx@...utronix.de, mhiramat@...hat.com, heiko.carstens@...ibm.com,
	benh@...nel.crashing.org, davem@...emloft.net, lethal@...ux-sh.org,
	schwidefsky@...ibm.com, brueckner@...ux.vnet.ibm.com,
	tony.luck@...el.com
Subject: Re: [PATCH 00/12] tracing: add compat syscall support v2

On Fri, Feb 26, 2010 at 04:36:55PM -0500, Jason Baron wrote:
> Hi,
> 
> Re-post to add infrastructure for compat syscall event tracing support. This
> patch series also adds x86_64 arch specific support as an example consumer
> of the new infrastructure.
> 
> The new interface consists of:
> 
> 1) int is_compat_task(void);
>   - most arches seem to have this already
> 2) unsigned long arch_compat_syscall_addr(int nr);
>   - returns a pointer to the compat syscall entry corresponding to syscall 'nr'
> 3) int NR_syscalls_compat;
>   - number of entries in the compat syscall table.
> 
> Thus, arches that set CONFIG_FTRACE_SYSCALLS and CONFIG_COMPAT are going to
> need to implement the above interfaces in order to build. Thus, I'm 'cc arch
> maintainers.
> 
> Naming. I've also introduced a couple of new syscall macros:
> 
> ARCH_COMPAT_SYSCALL_DEFINE#N()
> COMPAT_SYSCALL_DEFINE#N()
> 
> These tack on, "arch_compat_sys" and "compat_sys" respectively, to the
> beginning of the compat syscall names.
> 
> thanks,
> 
> -Jason


I'll review this series soon.

Thanks a lot!



> 
> Jason Baron (11):
>   x86: add NR_syscalls_compat, make ia32 syscall table visible
>   x86: add arch_compat_syscall_addr()
>   tracing: remove syscall bitmaps in preparation for compat support
>   tracing: add tracing support for compat syscalls
>   syscalls: add ARCH_COMPAT_SYSCALL_DEFINE()
>   x86, compat: convert ia32 layer to use ARCH_COMPAT_SYSCALL_DEFINE#N()
>   syscalls: add new COMPAT_SYSCALL_DEFINE#N() macro
>   compat: convert to use COMPAT_SYSCALL_DEFINE#N()
>   compat: convert fs compat to use COMPAT_SYSCALL_DEFINE#N() macros
>   tags: recognize syscalls
>   cleanup: remove arg from TRACE_SYS_ENTER_PROFILE_INIT() macro
> 
> Heiko Carstens (1):
>   compat: have generic is_compat_task for !CONFIG_COMPAT
> 
>  arch/s390/include/asm/compat.h  |    7 --
>  arch/s390/kernel/ptrace.c       |    2 +-
>  arch/s390/kernel/setup.c        |    2 +-
>  arch/s390/mm/mmap.c             |    2 +-
>  arch/x86/ia32/ia32entry.S       |   53 ++++++++-------
>  arch/x86/ia32/sys_ia32.c        |  106 ++++++++++++++--------------
>  arch/x86/include/asm/compat.h   |    2 +
>  arch/x86/kernel/ftrace.c        |   11 +++
>  drivers/s390/block/dasd_eckd.c  |    2 +-
>  drivers/s390/block/dasd_ioctl.c |    1 +
>  drivers/s390/char/fs3270.c      |    1 +
>  drivers/s390/char/vmcp.c        |    1 +
>  drivers/s390/cio/chsc_sch.c     |    1 +
>  drivers/s390/scsi/zfcp_cfdc.c   |    1 +
>  fs/compat.c                     |  147 +++++++++++++++++++--------------------
>  include/linux/compat.h          |    9 +++
>  include/linux/syscalls.h        |   70 ++++++++++++-------
>  include/trace/syscall.h         |    8 ++
>  kernel/compat.c                 |  106 ++++++++++++++---------------
>  kernel/trace/trace.h            |    2 +
>  kernel/trace/trace_syscalls.c   |  101 +++++++++++++++++++--------
>  scripts/tags.sh                 |    8 ++-
>  22 files changed, 369 insertions(+), 274 deletions(-)
> 

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