xtensa: add minimal support

This is one of the architecture needing a specific predefine
set in order to correctly process byteorder.h.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>

5 files changed, 36 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index d7cfe4f5..1dbea8c5 100644
--- a/Makefile
+++ b/Makefile
@@ -83,6 +83,7 @@ LIB_OBJS += target-riscv.o
 LIB_OBJS += target-s390.o
 LIB_OBJS += target-sparc.o
 LIB_OBJS += target-x86.o
+LIB_OBJS += target-xtensa.o
 LIB_OBJS += tokenize.o
 LIB_OBJS += unssa.o
 LIB_OBJS += utils.o
diff --git a/machine.h b/machine.h
index 1b8b862a..7396aeb4 100644
--- a/machine.h
+++ b/machine.h
@@ -38,6 +38,7 @@ enum machine {
 	MACH_M68K,
 	MACH_MICROBLAZE,
 	MACH_NIOS2,
+	MACH_XTENSA,
 	MACH_UNKNOWN
 };
 
diff --git a/target-xtensa.c b/target-xtensa.c
new file mode 100644
index 00000000..3e5781c8
--- /dev/null
+++ b/target-xtensa.c
@@ -0,0 +1,31 @@
+#include "symbol.h"
+#include "target.h"
+#include "machine.h"
+
+
+static void init_xtensa(const struct target *self)
+{
+	wchar_ctype = &long_ctype;
+}
+
+static void predefine_xtensa(const struct target *self)
+{
+	predefine("__XTENSA__", 1, "1");
+	predefine("__xtensa__", 1, "1");
+
+	if (arch_big_endian)
+		predefine("__XTENSA_EB__", 1, "1");
+	else
+		predefine("__XTENSA_EL__", 1, "1");
+}
+
+const struct target target_xtensa = {
+	.mach = MACH_XTENSA,
+	.bitness = ARCH_LP32,
+	.big_endian = true,
+
+	.bits_in_longdouble = 64,
+
+	.init = init_xtensa,
+	.predefine = predefine_xtensa,
+};
diff --git a/target.c b/target.c
index b3966151..3c0588ab 100644
--- a/target.c
+++ b/target.c
@@ -77,6 +77,7 @@ static const struct target *targets[] = {
 	[MACH_SPARC32] =	&target_sparc32,
 	[MACH_SPARC64] =	&target_sparc64,
 	[MACH_X86_64] =		&target_x86_64,
+	[MACH_XTENSA] =		&target_xtensa,
 	[MACH_UNKNOWN] =	&target_default,
 };
 const struct target *arch_target = &target_default;
@@ -107,6 +108,7 @@ enum machine target_parse(const char *name)
 		{ "sparc",	MACH_SPARC32,	0,  },
 		{ "x86_64",	MACH_X86_64,	64, },
 		{ "x86-64",	MACH_X86_64,	64, },
+		{ "xtensa",	MACH_XTENSA,	32, },
 		{ NULL },
 	};
 	const struct arch *p;
diff --git a/target.h b/target.h
index 45ee40f1..4106a6a8 100644
--- a/target.h
+++ b/target.h
@@ -101,6 +101,7 @@ extern const struct target target_sparc32;
 extern const struct target target_sparc64;
 extern const struct target target_i386;
 extern const struct target target_x86_64;
+extern const struct target target_xtensa;
 
 /* target.c */
 extern const struct target *arch_target;