libgcc-x86_64-glibc.ver: Copy this file from the 3.1 branch.

2002-05-23  Bo Thorsen  <bo@suse.de>

        * config/i386/libgcc-x86_64-glibc.ver: Copy this file from the
	3.1 branch. The file was made by Jakub Jelinek.
	* config/i386/linux64.h (MD_FALLBACK_FRAME_STATE_FOR): Add i386
	support so multilib doesn't break. And don't define this at all
	when -Dinhibit_libc is used.
	(MULTILIB_DEFAULTS): Always set default to 64 bit compilation.
	* config/i386/t-linux64: Implement full multilib support. Patch
	originally done by Andreas Jaeger and Jakub Jelinek.

From-SVN: r53927

gcc/config/i386/linux64.h

@@ -65,14 +65,19 @@ Boston, MA 02111-1307, USA.  */
   %{m32:%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s} \
   %{!m32:%{!shared:crtend.o%s} %{shared:crtendS.o%s} /usr/lib64/crtn.o%s}"
 
+#define MULTILIB_DEFAULTS { "m64" }
+
 /* Do code reading to identify a signal frame, and set the frame
-   state data appropriately.  See unwind-dw2.c for the structs.  */
+   state data appropriately.  See unwind-dw2.c for the structs.  
+   Don't use this at all if inhibit_libc is used.  */
 
+#ifndef inhibit_libc
 #ifdef IN_LIBGCC2
 #include <signal.h>
 #include <sys/ucontext.h>
 #endif
 
+#ifdef __x86_64__
 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)		\
   do {									\
     unsigned char *pc_ = (CONTEXT)->ra;					\
@@ -129,3 +134,59 @@ Boston, MA 02111-1307, USA.  */
     (FS)->retaddr_column = 16;						\
     goto SUCCESS;							\
   } while (0)
+#else /* ifdef __x86_64__  */
+#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)		\
+  do {									\
+    unsigned char *pc_ = (CONTEXT)->ra;					\
+    struct sigcontext *sc_;						\
+    long new_cfa_;							\
+									\
+    /* popl %eax ; movl $__NR_sigreturn,%eax ; int $0x80  */		\
+    if (*(unsigned short *)(pc_+0) == 0xb858				\
+	&& *(unsigned int *)(pc_+2) == 119				\
+	&& *(unsigned short *)(pc_+6) == 0x80cd)			\
+      sc_ = (CONTEXT)->cfa + 4;						\
+    /* movl $__NR_rt_sigreturn,%eax ; int $0x80  */			\
+    else if (*(unsigned char *)(pc_+0) == 0xb8				\
+	     && *(unsigned int *)(pc_+1) == 173				\
+	     && *(unsigned short *)(pc_+5) == 0x80cd)			\
+      {									\
+	struct rt_sigframe {						\
+	  int sig;							\
+	  struct siginfo *pinfo;					\
+	  void *puc;							\
+	  struct siginfo info;						\
+	  struct ucontext uc;						\
+	} *rt_ = (CONTEXT)->cfa;					\
+	sc_ = (struct sigcontext *) &rt_->uc.uc_mcontext;		\
+      }									\
+    else								\
+      break;								\
+									\
+    new_cfa_ = sc_->esp;						\
+    (FS)->cfa_how = CFA_REG_OFFSET;					\
+    (FS)->cfa_reg = 4;							\
+    (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;		\
+									\
+    /* The SVR4 register numbering macros aren't usable in libgcc.  */	\
+    (FS)->regs.reg[0].how = REG_SAVED_OFFSET;				\
+    (FS)->regs.reg[0].loc.offset = (long)&sc_->eax - new_cfa_;		\
+    (FS)->regs.reg[3].how = REG_SAVED_OFFSET;				\
+    (FS)->regs.reg[3].loc.offset = (long)&sc_->ebx - new_cfa_;		\
+    (FS)->regs.reg[1].how = REG_SAVED_OFFSET;				\
+    (FS)->regs.reg[1].loc.offset = (long)&sc_->ecx - new_cfa_;		\
+    (FS)->regs.reg[2].how = REG_SAVED_OFFSET;				\
+    (FS)->regs.reg[2].loc.offset = (long)&sc_->edx - new_cfa_;		\
+    (FS)->regs.reg[6].how = REG_SAVED_OFFSET;				\
+    (FS)->regs.reg[6].loc.offset = (long)&sc_->esi - new_cfa_;		\
+    (FS)->regs.reg[7].how = REG_SAVED_OFFSET;				\
+    (FS)->regs.reg[7].loc.offset = (long)&sc_->edi - new_cfa_;		\
+    (FS)->regs.reg[5].how = REG_SAVED_OFFSET;				\
+    (FS)->regs.reg[5].loc.offset = (long)&sc_->ebp - new_cfa_;		\
+    (FS)->regs.reg[8].how = REG_SAVED_OFFSET;				\
+    (FS)->regs.reg[8].loc.offset = (long)&sc_->eip - new_cfa_;		\
+    (FS)->retaddr_column = 8;						\
+    goto SUCCESS;							\
+  } while (0)
+#endif /* ifdef __x86_64__  */
+#endif /* ifdef inhibit_libc  */

gcc/config/i386/t-linux64

-# On x86-64 we do not need any exports for glibc, override the settings
+# On x86-64 we do not need any exports for glibc for 64-bit libgcc_s,
+# override the settings
 # from t-slibgcc-elf-ver and t-linux
-SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver
+SHLIB_MAPFILES = $(srcdir)/libgcc-std.ver \
+		 $(srcdir)/config/i386/libgcc-x86_64-glibc.ver
+
+MULTILIB_OPTIONS = m64/m32
+MULTILIB_DIRNAMES = 64 32 
+
+LIBGCC = stmp-multilib
+INSTALL_LIBGCC = install-multilib
+
+EXTRA_MULTILIB_PARTS=crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o
+
+SHLIB_SLIBDIR_SUFFIXES = 64:64 32: