PowerPC: Add support for -msingle-pic-base
-msingle-pic-base is a new gcc option for ppc and
it reduces the size of my u-boot with 6-8 KB.
While at it, add -fno-jump-tables too to save a
few more bytes.
-msingle-pic-base will be in gcc 4.6, however
backported patches are available at
http://bugs.gentoo.org/show_bug.cgi?id=347281
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
diff --git a/arch/powerpc/cpu/mpc8220/start.S b/arch/powerpc/cpu/mpc8220/start.S
index 300b35c..1df87a6 100644
--- a/arch/powerpc/cpu/mpc8220/start.S
+++ b/arch/powerpc/cpu/mpc8220/start.S
@@ -129,7 +129,11 @@
/*--------------------------------------------------------------*/
GET_GOT /* initialize GOT access */
-
+#if defined(__pic__) && __pic__ == 1
+ /* Needed for upcoming -msingle-pic-base */
+ bl _GLOBAL_OFFSET_TABLE_@local-4
+ mflr r30
+#endif
/* r3: IMMR */
bl cpu_init_f /* run low-level CPU init code (in Flash)*/
@@ -522,6 +526,11 @@
mr r10, r5 /* Save copy of Destination Address */
GET_GOT
+#if defined(__pic__) && __pic__ == 1
+ /* Needed for upcoming -msingle-pic-base */
+ bl _GLOBAL_OFFSET_TABLE_@local-4
+ mflr r30
+#endif
mr r3, r5 /* Destination Address */
lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
ori r4, r4, CONFIG_SYS_MONITOR_BASE@l