From: Jason Baron on

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.



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(-)

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