[PATCH 00/17] Implement gdbarch_gdb_signal_to_target

[Sergio Durigan Junior <sergiodj@redhat.com>]

Hello,

This patch implements the new gdbarch method gdbarch_gdb_signal_to_target.
It will be used when one wants to convert between the internal GDB signal
representation (enum gdb_signal) and the target's representation.

The idea of this patch came from a chat between Pedro and I on IRC, plus
the discussion of my patches to add the new $_exitsignal convenience
variable:

	<http://sourceware.org/ml/gdb-patches/2013-06/msg00452.html>
	<http://sourceware.org/ml/gdb-patches/2013-06/msg00352.html>

What I did was to investigate, on the Linux kernel, which targets shared
the signal numbers definition with x86.  My approach was to make the x86
the "de facto" implementation, and extend only the needed bits on each
arch.  For the record, I used linux-3.10-rc6 as the main source of
information, always looking at
arch/<ARCH_NAME>/include/uapi/asm/signal.h.  For SIGRTMAX (which defaults
to _NSIG in most cases), I had to look at different signal-related
files, but most of them (except MIPS) were defined to 64 anyway.

Then, with all the differences in hand, I implemented the bits on each
target.  Since I obviously don't have access to all targets, I could not
compile GDB to make sure everything worked on each one of them, but I'd
be surprised if it didn't.  I also am not submitting a testcase with
this patch because the gdbarch method is not being used anywhere yet; I
should send a proper testcase when I resubmit the $_exitsignal + $_signo
patches, because they will make use of the method.

I would appreciate if you could take a look and tell me your opinions.
Most of the patches are trivial, because they share all the signal
numbers with x86.  If you want to narrow your review, I'd recommend
taking a look at the patches 01, 02, and 17 (MIPS, see the message +
patch for more explanations).  Also, if you intend to test the
compilation of this patch on some architecture, you will need patches
01 and 02 to successfully compile it.

OK to apply?  Comments are welcome.

Thanks.

--
Sergio

gdb/alpha-linux-tdep.c   |  89 +++++++++++++++++++++++
gdb/amd64-linux-tdep.c   |   5 ++
gdb/arm-linux-tdep.c     |  14 ++++
gdb/avr-tdep.c           |  50 +++++++++++++
gdb/cris-tdep.c          |   5 +-
gdb/gdbarch.c            |  33 +++++++++
gdb/gdbarch.h            |  14 ++++
gdb/gdbarch.sh           |   9 +++
gdb/h8300-tdep.c         |   4 ++
gdb/i386-linux-tdep.c    |   5 ++
gdb/ia64-linux-tdep.c    |   2 +
gdb/linux-tdep.c         | 182 +++++++++++++++++++++++++++++++++++++++++++++++
gdb/linux-tdep.h         |   3 +
gdb/m32r-linux-tdep.c    |   2 +
gdb/m68klinux-tdep.c     |   3 +
gdb/mips-linux-tdep.c    | 132 ++++++++++++++++++++++++++++++++++
gdb/mn10300-linux-tdep.c |   2 +
gdb/s390-tdep.c          |   2 +
gdb/sparc-linux-tdep.c   |  83 +++++++++++++++++++++
gdb/xtensa-linux-tdep.c  |  49 +++++++++++++
20 files changed, 687 insertions(+), 1 deletion(-)