From: Chuck Ebbert <76306.1226@compuserve.com>
Date: Fri, 6 Jan 2006 04:11:29 +0000 (-0500)
Subject: [PATCH] i386: PTRACE_POKEUSR: allow changing RF bit in EFLAGS register.
X-Git-Tag: v2.6.16-rc1~474^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9f155b9802bb7049cd0f216c3fe903b58620df11;p=pandora-kernel.git

[PATCH] i386: PTRACE_POKEUSR: allow changing RF bit in EFLAGS register.

Setting RF (resume flag) allows a debugger to resume execution after a
code breakpoint without tripping the breakpoint again.  It is reset by
the CPU after execution of one instruction.

Requested by Stephane Eranian:
  "I am trying to the user HW debug registers on i386 and I am running
   into a problem with ptrace() not allowing access to EFLAGS_RF for
   POKEUSER (see FLAG_MASK).  [ ...  ] It avoids the need to remove the
   breakpoint, single step, and reinstall.  The equivalent functionality
   exists on IA-64 and is allowed by ptrace()"

Cc: Stephane Eranian <eranian@hpl.hp.com>
Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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