[PATCH 0/6] tracing: add compat syscall support

[Jason Baron <jbaron@redhat.com>]

Hi,

This series adds 'compat' syscall tracing support, and updates x86_64 to use
this new functionality. Other arches still need to be implemented.

To provide arch support 3 interfaces need to be defined:
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.

Patches #1 and #2 in the series, implement the "NR_syscalls_compat" and the
"arch_compat_syscall_addr()" for x86.

Patches #3 and #4 add the necessary 'core' support for compat syscalls to the
event tracing code.

Finally, patches #5 and #6 convert 28 x86 compat syscalls to use the 
'DEFINE_SYSCALL' macros, which is necessary for syscall tracing.

thanks,

-Jason


Jason Baron (6):
  -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 define syscall prefix macro
  -x86: convert compat syscalls to use 'DEFINE_SYSCALL()' macros

 arch/x86/ia32/ia32entry.S     |    3 +
 arch/x86/ia32/sys_ia32.c      |  106 ++++++++++++++++++++--------------------
 arch/x86/include/asm/compat.h |    2 +
 arch/x86/kernel/ftrace.c      |    9 ++++
 include/linux/compat.h        |    8 +++
 include/linux/syscalls.h      |   16 ++++++
 include/trace/syscall.h       |    8 +++
 kernel/trace/trace.h          |    2 +
 kernel/trace/trace_syscalls.c |  101 ++++++++++++++++++++++++++++-----------
 9 files changed, 174 insertions(+), 81 deletions(-)