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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>
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@ -67,3 +67,21 @@ Note that TYPE and ELEMENT have to be quoted as strings."""
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elementname.string())
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elementname.string())
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ContainerOf()
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ContainerOf()
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BIG_ENDIAN = 0
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LITTLE_ENDIAN = 1
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target_endianness = None
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def get_target_endianness():
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global target_endianness
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if target_endianness is None:
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endian = gdb.execute("show endian", to_string=True)
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if "little endian" in endian:
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target_endianness = LITTLE_ENDIAN
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elif "big endian" in endian:
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target_endianness = BIG_ENDIAN
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else:
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raise gdb.GdgError("unknown endianness '{0}'".format(endian))
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return target_endianness
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