[ltt-dev] [PATCH 1/4] add ARM specific support for UST

[Jason Wessel]

Add the link definition and the inline assembly required for User
Space Trace support on ARM.

Signed-off-by: Jason Wessel <jason.wessel at windriver.com>
---
 configure.ac            |    1 +
 include/ust/processor.h |   15 +++++++++++++++
 2 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index e57b356..5e58eab 100644
--- a/configure.ac
+++ b/configure.ac
@@ -104,6 +104,7 @@ changequote([,])dnl
 	ppc64) LIBFORMAT="elf64-powerpc" ;;
 	s390) LIBFORMAT="elf32-s390" ;;
 	s390x) LIBFORMAT="elf64-s390" ;;
+	arm) LIBFORMAT="elf32-littlearm" ;;
 	*) AC_MSG_ERROR([unable to detect library format (unsupported architecture ($host_cpu)?)]) ;;
 esac
 AC_SUBST(LIBFORMAT)
diff --git a/include/ust/processor.h b/include/ust/processor.h
index 8a01a88..01aa290 100644
--- a/include/ust/processor.h
+++ b/include/ust/processor.h
@@ -449,4 +449,19 @@ static __inline__ int fls(unsigned int x)
 
 #endif /* __PPC__ */
 
+#ifdef __arm__
+
+struct registers {
+};
+
+#define ARCH_COPY_ADDR(dst) "ldr "dst", =2b\n\t" \
+"b 55f\n\t" \
+".ltorg\n\t" \
+"55:\n\t"
+
+#define _ASM_PTR ".long "
+#define save_registers(a)
+
+#endif /* __arm__ */
+
 #endif /* UST_PROCESSOR_H */
-- 
1.6.6.2