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authorJan Kiszka <jan.kiszka@siemens.com>2015-02-17 13:46:58 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-17 14:34:53 -0800
commit7f994963745b9cea89a2816dae7cc3a1fc01adcc (patch)
tree8f100eb57664208e2f1d42fe3a35e605f9fe3cd7
parent7b599ef535a7faef53034fb7fb150b61057efe28 (diff)
downloadlwn-7f994963745b9cea89a2816dae7cc3a1fc01adcc.tar.gz
lwn-7f994963745b9cea89a2816dae7cc3a1fc01adcc.zip
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>
-rw-r--r--scripts/gdb/linux/utils.py18
1 files changed, 18 insertions, 0 deletions
diff --git a/scripts/gdb/linux/utils.py b/scripts/gdb/linux/utils.py
index c9d705b62bfe..10a227bdb621 100644
--- a/scripts/gdb/linux/utils.py
+++ b/scripts/gdb/linux/utils.py
@@ -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