Define _RELOCATABLE if -mrelocatable; Rewrite eabi.asm for use with -mrelocatable.

From-SVN: r9130

gcc/config/rs6000/eabi.asm

@@ -5,19 +5,25 @@
 	.section ".text"
 	.globl	 __eabi
 
-	.long	0x4000				# traceback table
-__eabi:	mflr	0
-	bl	.Laddr				# get current address
+	 .section ".got2","aw"
+.LCTOC1 = .+32768
 
 # Table of addresses
-.Ltable:
-	.long	.Ltable				# address we are really at
+.Ltable = .-.LCTOC1
+	.long	.Laddr				# address we are really at
 	.long	_GLOBAL_OFFSET_TABLE_		# normal GOT address
 	.long	_GOT2_START_			# -mrelocatable GOT pointers start
 	.long	_GOT2_END_			# -mrelocatable GOT pointers end
 
+	.text
+.Lptr:	.long	.LCTOC1-.Laddr			# PC relative pointer to .got2
+	.long	0x4000				# traceback table
+
+__eabi:	mflr	0
+	bl	.Laddr				# get current address
 .Laddr:	mflr	11				# real address of .Ltable
-	lwz	12,0(11)			# linker generated address of .Ltable
+	lwz	12,(.Laddr-.Lptr)(11)		# linker generated address of .Ltable
+	add	12,12,11			# correct to real pointer
 	subf.	12,12,11			# calculate difference
 	bc	4,2,.Lreloc			# skip if we need to relocate
 

gcc/config/rs6000/sysv4.h

@@ -262,8 +262,34 @@ extern int rs6000_pic_labelno;
 #undef TARGET_VERSION
 #define TARGET_VERSION fprintf (stderr, " (PowerPC System V.4)");
 
-/* FIXME: These should actually indicate PowerPC, when there is some
-   standard way of expressing that.  */
 #undef CPP_PREDEFINES
 #define CPP_PREDEFINES \
   "-DPPC -Dunix -D__svr4__ -Asystem(unix) -Asystem(svr4) -Acpu(powerpc) -Amachine(powerpc)"
+
+#undef CPP_SPEC
+#define CPP_SPEC "\
+%{posix: -D_POSIX_SOURCE} \
+%{mrelocatable: -D_RELOCATABLE} \
+%{!mcpu*: \
+  %{mpower: %{!mpower2: -D_ARCH_PWR}} \
+  %{mpower2: -D_ARCH_PWR2} \
+  %{mpowerpc*: -D_ARCH_PPC} \
+  %{mno-powerpc: %{!mpower: %{!mpower2: -D_ARCH_COM}}} \
+  %{!mno-powerpc: -D_ARCH_PPC}} \
+%{mcpu=common: -D_ARCH_COM} \
+%{mcpu=power: -D_ARCH_PWR} \
+%{mcpu=powerpc: -D_ARCH_PPC} \
+%{mcpu=rios: -D_ARCH_PWR} \
+%{mcpu=rios1: -D_ARCH_PWR} \
+%{mcpu=rios2: -D_ARCH_PWR2} \
+%{mcpu=rsc: -D_ARCH_PWR} \
+%{mcpu=rsc1: -D_ARCH_PWR} \
+%{mcpu=601: -D_ARCH_PPC -D_ARCH_PWR} \
+%{mcpu=mpc601: -D_ARCH_PPC -D_ARCH_PWR} \
+%{mcpu=ppc601: -D_ARCH_PPC -D_ARCH_PWR} \
+%{mcpu=603: -D_ARCH_PPC} \
+%{mcpu=mpc603: -D_ARCH_PPC} \
+%{mcpu=ppc603: -D_ARCH_PPC} \
+%{mcpu=604: -D_ARCH_PPC} \
+%{mcpu=mpc604: -D_ARCH_PPC} \
+%{mcpu=ppc604: -D_ARCH_PPC}"