tree 802459fee3ff4855a99a68145fe0a9f7c5b8782a
parent fa0d1dbf7fb6b6f1af85d298a4054fe9edc914c9
author Will Deacon <will.deacon@arm.com> 1329823743 +0100
committer Russell King <rmk+kernel@arm.linux.org.uk> 1333106253 +0100

ARM: 7337/1: ptrace: fix ptrace_read_user for !CONFIG_MMU platforms

Commit 68b7f715 ("nommu: ptrace support") added definitions for
PT_TEXT_ADDR and friends, as well as adding ptrace support for reading
from these magic offsets.

Unfortunately, this has probably never worked, since ptrace_read_user
predicates reading on off < sizeof(struct user), returning -EIO
otherwise.

This patch moves the offset size check until after we have tried to
match it against either a magic value or an offset into pt_regs.

Cc: Paul Brook <paul@codesourcery.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>