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| author |   Ian Munsie <imunsie@au.ibm.com> | 2011-02-02 17:27:24 +0000 |
|---|---|---|
| committer |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-26 13:38:57 +1000 |
| commit | 02424d8966d803e33cbe51469be56b5d177b4a37 (patch) | |
| tree | 9bf4f118b92c912dc45a2a93a751c18deff4a00c /arch/powerpc/oprofile | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 (diff) | |
| download | linux-dev-02424d8966d803e33cbe51469be56b5d177b4a37.tar.xz linux-dev-02424d8966d803e33cbe51469be56b5d177b4a37.zip | |
powerpc/ftrace: Implement raw syscall tracepoints on PowerPC
This patch implements the raw syscall tracepoints on PowerPC and exports
them for ftrace syscalls to use.
To minimise reworking existing code, I slightly re-ordered the thread
info flags such that the new TIF_SYSCALL_TRACEPOINT bit would still fit
within the 16 bits of the andi. instruction's UI field. The instructions
in question are in /arch/powerpc/kernel/entry_{32,64}.S to and the
_TIF_SYSCALL_T_OR_A with the thread flags to see if system call tracing
is enabled.
In the case of 64bit PowerPC, arch_syscall_addr and
arch_syscall_match_sym_name are overridden to allow ftrace syscalls to
work given the unusual system call table structure and symbol names that
start with a period.
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/oprofile')
0 files changed, 0 insertions, 0 deletions