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author | Jan Kiszka <jan.kiszka@siemens.com> | 2015-02-17 22:47:01 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-17 23:34:53 +0100 |
commit | 78e878172327b1b6aa6264b1d22f9a083f9ddaa6 (patch) | |
tree | 42f6441e8eb8610922d43fcad320fcfd2d10f98f /scripts | |
parent | scripts/gdb: add get_target_endianness helper (diff) | |
download | linux-78e878172327b1b6aa6264b1d22f9a083f9ddaa6.tar.xz linux-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')
-rw-r--r-- | scripts/gdb/linux/utils.py | 21 |
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) |