Shared library support.

From-SVN: r8519

3 files changed, 32 insertions, 12 deletions

diff --git a/gcc/config/m88k/dgux.h b/gcc/config/m88k/dgux.h
index 9765cbe..8cc0080 100644
--- a/gcc/config/m88k/dgux.h
+++ b/gcc/config/m88k/dgux.h
@@ -31,7 +31,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
   (TARGET_SVR4 ? DWARF_DEBUG : SDB_DEBUG)
 
 #ifndef VERSION_INFO2
-#define VERSION_INFO2   "$Revision: 1.14 $"
+#define VERSION_INFO2   "$Revision: 1.15 $"
 #endif
 #ifndef NO_BUGS
 #define AS_BUG_IMMEDIATE_LABEL
@@ -119,8 +119,8 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #undef	LINK_SPEC
 #define LINK_SPEC "%{z*} %{h*} %{V} %{v:%{!V:-V}} \
 		   %{static:-dn -Bstatic} \
-		   %{shared:-G -dy} \
-		   %{symbolic:-Bsymbolic -G -dy} \
+		   %{shared:-G -dy -z text} \
+		   %{symbolic:-Bsymbolic -G -dy -z text} \
 		   %{pg:-L/usr/lib/libp}%{p:-L/usr/lib/libp}"
 #undef	STARTFILE_SPEC
 #define STARTFILE_SPEC "%{!shared:%{!symbolic:%{pg:gcrt0.o%s} \
@@ -176,7 +176,6 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 /* Override svr4.h and m88k.h except when compiling crtstuff.c.  These must
    be constant strings when compiling crtstuff.c.  Otherwise, respect the
    -mversion-STRING option used.  */
-#undef INIT_SECTION_PREAMBLE
 #undef INIT_SECTION_ASM_OP
 #undef FINI_SECTION_ASM_OP
 #undef CTORS_SECTION_ASM_OP
@@ -196,12 +195,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 			      ? "section\t .dtors,\"aw\""	\
 			      : "section\t .dtors,\"d\"")
 #else
-/* These must be constant strings for crtstuff.c.  
-   An elf and bcs crtbegin.o are needed since bcs does not  
-   increment the stack pointer in the init section as elf does */
-#ifndef BCS
-#define INIT_SECTION_PREAMBLE asm ("\taddu\tr31,r31,0x20")  
-#endif
+/* These must be constant strings for crtstuff.c.  */
 #define INIT_SECTION_ASM_OP	"section\t .init,\"x\""
 #define FINI_SECTION_ASM_OP	"section\t .fini,\"x\""
 #define CTORS_SECTION_ASM_OP	"section\t .ctors,\"d\""
diff --git a/gcc/config/m88k/sysv4.h b/gcc/config/m88k/sysv4.h
index 428c2cf..cb774a5 100644
--- a/gcc/config/m88k/sysv4.h
+++ b/gcc/config/m88k/sysv4.h
@@ -60,7 +60,25 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 /* Override svr4.h and m88k.h.  */
 #undef	INIT_SECTION_ASM_OP
 #define INIT_SECTION_ASM_OP "section\t.init,\"xa\",#progbits"
+#undef	FINI_SECTION_ASM_OP
+#define FINI_SECTION_ASM_OP "section\t.fini,\"xa\",#progbits"
+
+/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
+ 
+   Note that we want to give these sections the SHF_WRITE attribute
+   because these sections will actually contain data (i.e. tables of
+   addresses of functions in the current root executable or shared library
+   file) and, in the case of a shared library, the relocatable addresses
+   will have to be properly resolved/relocated (and then written into) by
+   the dynamic linker when it actually attaches the given shared library
+   to the executing process.  (Note that on SVR4, you may wish to use the
+   `-z text' option to the ELF linker, when building a shared library, as
+   an additional check that you are doing everything right.  But if you do
+   use the `-z text' option when building a shared library, you will get
+   errors unless the .ctors and .dtors sections are marked as writable
+   via the SHF_WRITE attribute.)  */
+ 
 #undef	CTORS_SECTION_ASM_OP
-#define CTORS_SECTION_ASM_OP	"section\t.ctors,\"a\",#progbits"
+#define CTORS_SECTION_ASM_OP	"section\t.ctors,\"aw\""
 #undef	DTORS_SECTION_ASM_OP
-#define DTORS_SECTION_ASM_OP	"section\t.dtors,\"a\",#progbits"
+#define DTORS_SECTION_ASM_OP	"section\t.dtors,\"aw\""
diff --git a/gcc/config/m88k/t-sysv4 b/gcc/config/m88k/t-sysv4
index 419a9db..6a77edb 100644
--- a/gcc/config/m88k/t-sysv4
+++ b/gcc/config/m88k/t-sysv4
@@ -12,3 +12,11 @@ $(MOVE_ASM): $(srcdir)/config/m88k/m88k-move.sh
 LIB2FUNCS_EXTRA = $(MOVE_ASM)
 LIBGCC1 = libgcc1.null
 CROSS_LIBGCC1 = libgcc1.null
+
+# We need to use -fpic when we are using gcc to compile the routines in
+# crtstuff.c.  This is only really needed when we are going to use gcc/g++
+# to produce a shared library, but since we don't know ahead of time when
+# we will be doing that, we just always use -fpic when compiling the
+# routines in crtstuff.c.
+
+CRTSTUFF_T_CFLAGS=-fpic