From 39768f7715ed637ef02f49fc7de664cc1aaf14b3 Mon Sep 17 00:00:00 2001 From: Joakim Tjernlund Date: Mon, 6 Dec 2010 18:35:37 +0100 Subject: 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 --- arch/powerpc/cpu/mpc86xx/start.S | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/cpu/mpc86xx/start.S') diff --git a/arch/powerpc/cpu/mpc86xx/start.S b/arch/powerpc/cpu/mpc86xx/start.S index 3e3c21e..2ec7fd4 100644 --- a/arch/powerpc/cpu/mpc86xx/start.S +++ b/arch/powerpc/cpu/mpc86xx/start.S @@ -255,7 +255,11 @@ addr_trans_enabled: stwu r0, -4(r1) /* stack backtraces terminate cleanly */ 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 /* run low-level CPU init code (from Flash) */ bl cpu_init_f sync @@ -620,6 +624,11 @@ relocate_code: 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 -- cgit v1.1