diff options
| author | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2015-11-25 17:56:32 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-01-13 21:05:17 -0500 |
| commit | ecc306639e83c9019a5093b77a48685ea40eedc2 (patch) | |
| tree | 7785c9d7358ccd22ddabe52489aae8a8c7035ffe /arch/arc | |
| parent | 20d08f59fa7cdde0da1eb7aca7915c91dbdeaf51 (diff) | |
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 <albert.u.boot@aribaud.net>
Acked-by: Thomas Chou <thomas@wytron.com.tw>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/lib/start.S | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/arc/lib/start.S b/arch/arc/lib/start.S index 26a59341893..90ee7e0fe40 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 |