From: Jason Wessel <jason.wessel@windriver.com>
Date: Tue, 22 Feb 2011 22:34:09 +0000 (-0500)
Subject: add ARM specific support for UST
X-Git-Tag: v0.12~36
X-Git-Url: http://git.lttng.org/?p=ust.git;a=commitdiff_plain;h=fbc70e6fa4665372ad22ecb03c7ff7b4e2b6a019

add ARM specific support for UST

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

[ edit: coding style cleanup ]

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

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 6ee44dd..35dcbb2 100644
--- a/include/ust/processor.h
+++ b/include/ust/processor.h
@@ -476,4 +476,19 @@ static __inline__ int fls(unsigned int x)
 
 #endif
 
+#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 */