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authorJan Kiszka <jan.kiszka@siemens.com>2015-02-17 13:47:01 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-17 14:34:53 -0800
commit78e878172327b1b6aa6264b1d22f9a083f9ddaa6 (patch)
tree42f6441e8eb8610922d43fcad320fcfd2d10f98f /scripts/gdb/linux
parentscripts/gdb: add get_target_endianness helper (diff)
downloadlinux-dev-78e878172327b1b6aa6264b1d22f9a083f9ddaa6.tar.xz
linux-dev-78e878172327b1b6aa6264b1d22f9a083f9ddaa6.zip
scripts/gdb: add read_u16/32/64 helpers
Add helpers for reading integers from target memory buffers. Required when caching the memory access is more efficient than reading individual values via gdb. 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>
Diffstat (limited to 'scripts/gdb/linux')
-rw-r--r--scripts/gdb/linux/utils.py21
1 files changed, 21 insertions, 0 deletions
diff --git a/scripts/gdb/linux/utils.py b/scripts/gdb/linux/utils.py
index 10a227bdb621..808a26596827 100644
--- a/scripts/gdb/linux/utils.py
+++ b/scripts/gdb/linux/utils.py
@@ -85,3 +85,24 @@ def get_target_endianness():
else:
raise gdb.GdgError("unknown endianness '{0}'".format(endian))
return target_endianness
+
+
+def read_u16(buffer):
+ if get_target_endianness() == LITTLE_ENDIAN:
+ return ord(buffer[0]) + (ord(buffer[1]) << 8)
+ else:
+ return ord(buffer[1]) + (ord(buffer[0]) << 8)
+
+
+def read_u32(buffer):
+ if get_target_endianness() == LITTLE_ENDIAN:
+ return read_u16(buffer[0:2]) + (read_u16(buffer[2:4]) << 16)
+ else:
+ return read_u16(buffer[2:4]) + (read_u16(buffer[0:2]) << 16)
+
+
+def read_u64(buffer):
+ if get_target_endianness() == LITTLE_ENDIAN:
+ return read_u32(buffer[0:4]) + (read_u32(buffer[4:8]) << 32)
+ else:
+ return read_u32(buffer[4:8]) + (read_u32(buffer[0:4]) << 32)