Commit 78e87817 authored by Jan Kiszka's avatar Jan Kiszka Committed by Linus Torvalds

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's avatarJan Kiszka <>
Cc: Thomas Gleixner <>
Cc: Jason Wessel <>
Cc: Andi Kleen <>
Cc: Ben Widawsky <>
Cc: Borislav Petkov <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 7f994963
......@@ -85,3 +85,24 @@ def get_target_endianness():
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)
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)
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)
return read_u32(buffer[4:8]) + (read_u32(buffer[0:4]) << 32)
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