Re: [PATCH v2] Reset errno before PTRACE_PEEKUSER for MIPS DSP_CONTROL

["Maciej W. Rozycki" <macro@codesourcery.com>]

On Mon, 1 Sep 2014, James Hogan wrote:

> PTRACE_PEEKUSER can return -1, which is usually used to determine whether
> a system call has reported an error, so errno must be used alone to
> determine whether an error occurred. However errno isn't modified by a
> successful system call so it must be reset to a known value (0) before the
> syscall call.
> 
> Add the missing errno reset when reading the DSP_CONTROL register in the
> native MIPS Linux backend and the MIPS gdbserver backend.
> 
> gdb/:
> 	* mips-linux-nat.c (mips_linux_read_description): Reset errno to 0
> 	prior to reading DSP_CONTROL with PTRACE_PEEKUSER ptrace call.
> 
> gdb/gdbserver/:
> 	* linux-mips-low.c (mips_read_description): Reset errno to 0 prior
> 	to reading DSP_CONTROL with PTRACE_PEEKUSER ptrace call.

 This is fine, go ahead and apply it.  Thanks.

  Maciej