From 0f8aa159175385ddd77bc91d11b9568583fbbd0c Mon Sep 17 00:00:00 2001 From: Joakim Tjernlund Date: Tue, 19 Jan 2010 14:41:56 +0100 Subject: ppc: Use r12 instead of r14 as GOT pointer. r14 is not supposed to be clobbered by functions. Switch to r12 and call GET_GOT when needed. This will allow u-boot to loose the -ffixed-r14 gcc option. Signed-off-by: Joakim Tjernlund --- cpu/mpc8220/start.S | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) (limited to 'cpu/mpc8220') diff --git a/cpu/mpc8220/start.S b/cpu/mpc8220/start.S index 5218c859dfc..e28999d3228 100644 --- a/cpu/mpc8220/start.S +++ b/cpu/mpc8220/start.S @@ -55,7 +55,7 @@ /* * Set up GOT: Global Offset Table * - * Use r14 to access the GOT + * Use r12 to access the GOT */ START_GOT GOT_ENTRY(_GOT2_TABLE_) @@ -532,6 +532,7 @@ relocate_code: mr r9, r4 /* Save copy of Global Data pointer */ mr r10, r5 /* Save copy of Destination Address */ + GET_GOT mr r3, r5 /* Destination Address */ lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */ ori r4, r4, CONFIG_SYS_MONITOR_BASE@l @@ -549,7 +550,7 @@ relocate_code: sub r15, r10, r4 /* First our own GOT */ - add r14, r14, r15 + add r12, r12, r15 /* then the one used by the C code */ add r30, r30, r15 @@ -622,7 +623,7 @@ relocate_code: in_ram: /* - * Relocation Function, r14 point to got2+0x8000 + * Relocation Function, r12 point to got2+0x8000 * * Adjust got2 pointers, no need to check for 0, this code * already puts a few entries in the table. @@ -687,6 +688,8 @@ clear_bss: */ .globl trap_init trap_init: + mflr r4 /* save link register */ + GET_GOT lwz r7, GOT(_start) lwz r8, GOT(_end_of_vectors) @@ -694,8 +697,6 @@ trap_init: cmplw 0, r7, r8 bgelr /* return if r7>=r8 - just in case */ - - mflr r4 /* save link register */ 1: lwz r0, 0(r7) stw r0, 0(r9) -- cgit v1.2.3