Commit 7f994963 authored Feb 17, 2015 by Jan Kiszka Committed by Linus Torvalds Feb 17, 2015

scripts/gdb: add get_target_endianness helper

Parse the target endianness from the output of "show endian" and cache the
result to return it via the new helper get_target_endiannes.  We will need
it for reading integers from buffers that contain target memory.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 7b599ef5

scripts/gdb/linux/utils.py

+18 −0

Original line number	Diff line number	Diff line
		@@ -67,3 +67,21 @@ Note that TYPE and ELEMENT have to be quoted as strings."""
		elementname.string())

		ContainerOf()


		BIG_ENDIAN = 0
		LITTLE_ENDIAN = 1
		target_endianness = None


		def get_target_endianness():
		global target_endianness
		if target_endianness is None:
		endian = gdb.execute("show endian", to_string=True)
		if "little endian" in endian:
		target_endianness = LITTLE_ENDIAN
		elif "big endian" in endian:
		target_endianness = BIG_ENDIAN
		else:
		raise gdb.GdgError("unknown endianness '{0}'".format(endian))
		return target_endianness