[PATCH] gdb for GNU/kFreeBSD on MIPS

[Robert Millan]

This patch makes gdb build/work for GNU/kFreeBSD on
MIPS.

It most likely also enables FreeBSD/MIPS, although I
haven't tested that (I don't have a FreeBSD system
handy).

(ChangeLog entry in patch header)

-- 
Robert Millan
-------------- next part --------------
2011-01-09  Robert Millan  <rmh@gnu.org>

	* configure.host: Detect mips-freebsd and mips-kfreebsd-gnu, and set
	`gdb_host' appropiately.
	* configure.tgt: Detect mips-freebsd and mips-kfreebsd-gnu, and use
	the same definitions as with mips-netbsd.

	* config/mips/fbsd.mh: New file.
	* config/mips/nbsd.mh (MH_CFLAGS): New variable (defines BSD_OSABI
	C macro).

	* mipsnbsd-tdep.c [BSD_OSABI == GDB_OSABI_FREEBSD_ELF]
	(MIPSNBSD_NUM_GREGS): Define as `40'.
	(MIPSNBSD_NUM_FPREGS): Define as `34'.
	(NBSD_MIPS_JB_PC): Define as `12'.

	* mipsnbsd-tdep.c (_initialize_mipsnbsd_tdep): Replace
	`GDB_OSABI_NETBSD_ELF' with `BSD_OSABI'.

=== added file 'gdb/config/mips/fbsd.mh'
--- gdb/config/mips/fbsd.mh	1970-01-01 00:00:00 +0000
+++ gdb/config/mips/fbsd.mh	2011-01-09 09:08:54 +0000
@@ -0,0 +1,4 @@
+# Host: FreeBSD/mips
+MH_CFLAGS= -DBSD_OSABI=GDB_OSABI_FREEBSD_ELF
+NATDEPFILES= fork-child.o inf-ptrace.o \
+	fbsd-nat.o mipsnbsd-nat.o

=== modified file 'gdb/config/mips/nbsd.mh'
--- gdb/config/mips/nbsd.mh	2004-10-31 20:47:55 +0000
+++ gdb/config/mips/nbsd.mh	2011-01-09 09:08:54 +0000
@@ -1,2 +1,3 @@
 # Host: NetBSD/mips
+MH_CFLAGS= -DBSD_OSABI=GDB_OSABI_NETBSD_ELF
 NATDEPFILES= fork-child.o inf-ptrace.o mipsnbsd-nat.o

=== modified file 'gdb/configure.host'
--- gdb/configure.host	2010-01-19 10:22:42 +0000
+++ gdb/configure.host	2011-01-08 10:40:17 +0000
@@ -120,6 +120,8 @@ mips-sgi-irix6*)	gdb_host=irix6 ;;
 mips*-*-linux*)		gdb_host=linux ;;
 mips*-*-netbsd* | mips*-*-knetbsd*-gnu)
 			gdb_host=nbsd ;;
+mips*-*-freebsd* | mips*-*-kfreebsd*-gnu)
+			gdb_host=fbsd ;;
 mips64*-*-openbsd*)	gdb_host=obsd64 ;;
 
 powerpc-*-aix* | rs6000-*-*)

=== modified file 'gdb/configure.tgt'
--- gdb/configure.tgt	2010-12-29 16:15:40 +0000
+++ gdb/configure.tgt	2011-01-08 10:40:17 +0000
@@ -356,8 +356,8 @@ mips*-*-linux*)
 	gdb_sim=../sim/mips/libsim.a
 	build_gdbserver=yes
 	;;
-mips*-*-netbsd* | mips*-*-knetbsd*-gnu)
-	# Target: MIPS running NetBSD
+mips*-*-netbsd* | mips*-*-knetbsd*-gnu | mips*-*-freebsd* | mips*-*-kfreebsd*-gnu)
+	# Target: MIPS running *BSD
 	gdb_target_obs="mips-tdep.o mipsnbsd-tdep.o \
 			corelow.o solib.o solib-svr4.o nbsd-tdep.o"
 	gdb_sim=../sim/mips/libsim.a
=== modified file 'gdb/mipsnbsd-tdep.c'
--- gdb/mipsnbsd-tdep.c	2011-01-01 15:32:52 +0000
+++ gdb/mipsnbsd-tdep.c	2011-01-09 09:08:54 +0000
@@ -45,10 +45,18 @@
 /* Core file support.  */
 
 /* Number of registers in `struct reg' from <machine/reg.h>.  */
+#if BSD_OSABI == GDB_OSABI_NETBSD_ELF
 #define MIPSNBSD_NUM_GREGS	38
+#elif BSD_OSABI == GDB_OSABI_FREEBSD_ELF
+#define MIPSNBSD_NUM_GREGS	40
+#endif
 
 /* Number of registers in `struct fpreg' from <machine/reg.h>.  */
+#if BSD_OSABI == GDB_OSABI_NETBSD_ELF
 #define MIPSNBSD_NUM_FPREGS	33
+#elif BSD_OSABI == GDB_OSABI_FREEBSD_ELF
+#define MIPSNBSD_NUM_FPREGS	34
+#endif
 
 /* Supply register REGNUM from the buffer specified by FPREGS and LEN
    in the floating-point register set REGSET to register cache
@@ -251,7 +259,11 @@ static const unsigned char sigtramp_retc
    at.  The PC is copied into *pc.  This routine returns true on
    success.  */
 
+#if BSD_OSABI == GDB_OSABI_NETBSD_ELF
 #define NBSD_MIPS_JB_PC			(2 * 4)
+#elif BSD_OSABI == GDB_OSABI_FREEBSD_ELF
+#define NBSD_MIPS_JB_PC			12
+#endif
 #define NBSD_MIPS_JB_ELEMENT_SIZE(gdbarch)	mips_isa_regsize (gdbarch)
 #define NBSD_MIPS_JB_OFFSET(gdbarch)		(NBSD_MIPS_JB_PC * \
 					 NBSD_MIPS_JB_ELEMENT_SIZE (gdbarch))
@@ -381,6 +393,6 @@ extern initialize_file_ftype _initialize
 void
 _initialize_mipsnbsd_tdep (void)
 {
-  gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_NETBSD_ELF,
+  gdbarch_register_osabi (bfd_arch_mips, 0, BSD_OSABI,
 			  mipsnbsd_init_abi);
 }