From 78e878172327b1b6aa6264b1d22f9a083f9ddaa6 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Tue, 17 Feb 2015 13:47:01 -0800 Subject: [PATCH] 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 Cc: Thomas Gleixner Cc: Jason Wessel Cc: Andi Kleen Cc: Ben Widawsky Cc: Borislav Petkov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/gdb/linux/utils.py | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) 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) -- 2.20.1