From a03f751e5ae42760e26ff81af989bbecb14303e9 Mon Sep 17 00:00:00 2001
From: Jake Burkholder <jake@FreeBSD.org>
Date: Mon, 6 Aug 2001 02:18:39 +0000
Subject: [PATCH] Add code model medlow to cflags and move the kernel load
 address from just before the memory hole to 4 megs.  Special case building
 exception.s like locore.s, it needs to at the beginning so the branches out
 from the trap table don't overflow.

---
 sys/conf/Makefile.sparc64 | 9 ++++++---
 sys/conf/files.sparc64    | 6 +++---
 sys/conf/ldscript.sparc64 | 8 ++++----
 3 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/sys/conf/Makefile.sparc64 b/sys/conf/Makefile.sparc64
index 94b7769dfab0..84ffd5f12cb6 100644
--- a/sys/conf/Makefile.sparc64
+++ b/sys/conf/Makefile.sparc64
@@ -65,7 +65,7 @@ INCLUDES+= -I/usr/include
 .endif
 
 COPTS=	${INCLUDES} ${IDENT} -D_KERNEL -include opt_global.h
-CFLAGS=	${COPTFLAGS} ${CWARNFLAGS} ${DEBUG} ${COPTS}
+CFLAGS=	${COPTFLAGS} ${CWARNFLAGS} ${DEBUG} ${COPTS} -mcmodel=medlow
 
 # XXX LOCORE means "don't declare C stuff" not "for locore.s".
 ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS}
@@ -99,9 +99,9 @@ NORMAL_M= perl5 $S/kern/makeobjops.pl -c $<; \
 
 GEN_CFILES= $S/$M/$M/genassym.c
 SYSTEM_CFILES= vnode_if.c hints.c config.c
-SYSTEM_SFILES= $S/$M/$M/locore.s
+SYSTEM_SFILES= $S/$M/$M/locore.s $S/$M/$M/exception.s
 SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
-SYSTEM_OBJS= locore.o vnode_if.o ${OBJS} hints.o config.o hack.So
+SYSTEM_OBJS= locore.o exception.o vnode_if.o ${OBJS} hints.o config.o hack.So
 SYSTEM_LD= @${LD} ${FMT} -Bdynamic -T $S/conf/ldscript.$M \
 	-export-dynamic -dynamic-linker /red/herring \
 	-o ${.TARGET} -X ${SYSTEM_OBJS} vers.o
@@ -178,6 +178,9 @@ kernel-clobber:
 locore.o: $S/$M/$M/locore.s assym.s
 	${NORMAL_S}
 
+exception.o: $S/$M/$M/exception.s assym.s
+	${NORMAL_S}
+
 # This is a hack.  BFD "optimizes" away dynamic mode if there are no
 # dynamic references.  We could probably do a '-Bforcedynamic' mode like
 # in the a.out ld.  For now, this works.
diff --git a/sys/conf/files.sparc64 b/sys/conf/files.sparc64
index 3938690a7b65..594f4d796fad 100644
--- a/sys/conf/files.sparc64
+++ b/sys/conf/files.sparc64
@@ -16,10 +16,10 @@ sparc64/sparc64/db_disasm.c	optional ddb
 sparc64/sparc64/db_interface.c	optional ddb
 sparc64/sparc64/db_trace.c	optional ddb
 sparc64/sparc64/elf_machdep.c	standard
-# locore.s needs to be handled in Makefile to put it first.  Otherwise it's
-# now normal.
+# locore.s and exception.s need to be handled in Makefile to put them first.
+# Otherwise it's they're normal.
 # sparc64/sparc64/locore.s	standard
-sparc64/sparc64/exception.s	standard
+# sparc64/sparc64/exception.s	standard
 sparc64/sparc64/fp.c		standard
 sparc64/sparc64/machdep.c	standard
 sparc64/sparc64/pmap.c		standard
diff --git a/sys/conf/ldscript.sparc64 b/sys/conf/ldscript.sparc64
index cc65cd463f38..8afcbebed909 100644
--- a/sys/conf/ldscript.sparc64
+++ b/sys/conf/ldscript.sparc64
@@ -9,7 +9,7 @@ ENTRY(_start)
 SECTIONS
 {
   /* Read-only sections, merged into text segment: */
-  . = 0x60000000000 + SIZEOF_HEADERS;
+  . = 0x400000 + SIZEOF_HEADERS;
   .interp     : { *(.interp) 	}
   .hash          : { *(.hash)		}
   .dynsym        : { *(.dynsym)		}
@@ -128,7 +128,7 @@ SECTIONS
   .init          : 
   { 
     KEEP (*(.init))
-  } = 0x60000000000
+  } = 0x400000
   .text      :
   {
     *(.trap)
@@ -138,11 +138,11 @@ SECTIONS
     /* .gnu.warning sections are handled specially by elf32.em.  */
     *(.gnu.warning)
     *(.gnu.linkonce.t.*)
-  } = 0x60000000000
+  } = 0x400000
   .fini      :
   {
     KEEP (*(.fini))
-  } = 0x60000000000
+  } = 0x400000
   PROVIDE (__etext = .);
   PROVIDE (_etext = .);
   PROVIDE (etext = .);