Fix: remove ARM set_tls system call override

We'll need to find a better way to instrument ARM-specific system calls
located at a far offset from the standard systems calls. A 16MB
lttng-modules kernel module is really not acceptable.

Removing this instrumentation for now. sys_set_tls will appear as
sys_unknown.

Fixes #472

CC: Ryan Kyser <Ryan.Kyser@jci.com>
Ref: http://lists.lttng.org/pipermail/lttng-dev/2013-April/019990.html
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/instrumentation/syscalls/headers/arm-32-syscalls-2.6.38_integers_override.h b/instrumentation/syscalls/headers/arm-32-syscalls-2.6.38_integers_override.h
index 93b86746d0d19c828004461d002f7e58cec8f3a1..895370f1b8fbac3b9446dfc010e223e175d2ce0c 100644 (file)
--- a/instrumentation/syscalls/headers/arm-32-syscalls-2.6.38_integers_override.h
+++ b/instrumentation/syscalls/headers/arm-32-syscalls-2.6.38_integers_override.h
@@ -2,7 +2,6 @@
 
 #define OVERRIDE_TABLE_32_sys_arm_fadvise64_64
 #define OVERRIDE_TABLE_32_sys_sync_file_range2
-#define OVERRIDE_TABLE_32_sys_set_tls
 
 #ifndef CREATE_SYSCALL_TABLE
 
@@ -38,18 +37,6 @@ SC_TRACE_EVENT(sys_sync_file_range2,
        TP_printk()
 )
 
-SC_TRACE_EVENT(sys_set_tls,
-       TP_PROTO(unsigned int tid, unsigned long tls),
-       TP_ARGS(tid, tls),
-       TP_STRUCT__entry(
-               __field(unsigned int, tid)
-               __field_hex(unsigned int, tls)),
-       TP_fast_assign(
-               tp_assign(tid, tid)
-               tp_assign(tls, tls)),
-       TP_printk()
-)
-
 #else  /* CREATE_SYSCALL_TABLE */
 
 #define OVVERRIDE_TABLE_32_sys_mmap
@@ -59,9 +46,6 @@ TRACE_SYSCALL_TABLE(sys_mmap, sys_mmap, 90, 6)
 TRACE_SYSCALL_TABLE(sys_arm_fadvise64_64, sys_arm_fadvise64_64, 270, 4)
 #define OVERRIDE_TABLE_32_sys_sync_file_range2
 TRACE_SYSCALL_TABLE(sys_sync_file_range2, sys_sync_file_range2, 341, 4)
-#define OVERRIDE_TABLE_32_sys_set_tls
-TRACE_SYSCALL_TABLE(sys_set_tls, sys_set_tls, 0xf0005, 2)
-
 
 #endif /* CREATE_SYSCALL_TABLE */