From ecc306639e83c9019a5093b77a48685ea40eedc2 Mon Sep 17 00:00:00 2001 From: Albert ARIBAUD Date: Wed, 25 Nov 2015 17:56:32 +0100 Subject: Fix board init code to respect the C runtime environment board_init_f_mem() alters the C runtime environment's stack it is actually already using. This is not a valid behaviour within a C runtime environment. Split board_init_f_mem into C functions which do not alter their own stack and always behave properly with respect to their C runtime environment. Signed-off-by: Albert ARIBAUD Acked-by: Thomas Chou --- arch/arc/lib/start.S | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) (limited to 'arch/arc') diff --git a/arch/arc/lib/start.S b/arch/arc/lib/start.S index 26a5934189..90ee7e0fe4 100644 --- a/arch/arc/lib/start.S +++ b/arch/arc/lib/start.S @@ -50,18 +50,20 @@ ENTRY(_start) 1: #endif - /* Setup stack- and frame-pointers */ + /* Establish C runtime stack and frame */ mov %sp, CONFIG_SYS_INIT_SP_ADDR mov %fp, %sp - /* Allocate and zero GD, update SP */ + /* Allocate reserved area from current top of stack */ mov %r0, %sp - bl board_init_f_mem - - /* Update stack- and frame-pointers */ + bl board_init_f_alloc_reserve + /* Set stack below reserved area, adjust frame pointer accordingly */ mov %sp, %r0 mov %fp, %sp + /* Initialize reserved area - note: r0 already contains address */ + bl board_init_f_init_reserve + /* Zero the one and only argument of "board_init_f" */ mov_s %r0, 0 j board_init_f -- cgit v1.2.1