From: Benoît Thébaudeau Date: Wed, 3 Sep 2014 21:32:34 +0000 (+0200) Subject: arm: Fix _start for CONFIG_SYS_DV_NOR_BOOT_CFG X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=a7f99bf139b3aaa0d5494693fd0395084355e41a;p=u-boot.git arm: Fix _start for CONFIG_SYS_DV_NOR_BOOT_CFG The boards using CONFIG_SYS_DV_NOR_BOOT_CFG (i.e. calimain, da850evm_direct_nor and enbw_cmc) had the _start symbol defined after the CONFIG_SYS_DV_NOR_BOOT_CFG word rather than before it in arch/arm/lib/vectors.S. Because of that, if by lack of luck 'gd->mon_len = (ulong)&__bss_end - (ulong)_start' (see setup_mon_len()) was a multiple of 4 kiB (see reserve_uboot()), then the last BSS word overlapped the first word of the following reserved RAM area (or went beyond the top of RAM without such an area) after relocation because __image_copy_start did not match _start (see relocate_code()). This was broken by commit 41623c9 'arm: move exception handling out of start.S files', which defined _start twice (before and after the CONFIG_SYS_DV_NOR_BOOT_CFG word), then by commit 0a26e1d 'arm: fix a double-definition error of _start symbol', which kept the definition of the _start symbol after the CONFIG_SYS_DV_NOR_BOOT_CFG word. This new commit fixes this issue by restoring the original behavior, i.e. by defining the _start symbol before the CONFIG_SYS_DV_NOR_BOOT_CFG word. Signed-off-by: Benoît Thébaudeau Cc: Albert Aribaud Cc: Manfred Rudigier Cc: Christian Riesch Cc: Sudhakar Rajashekhara Cc: Heiko Schocher --- diff --git a/arch/arm/lib/vectors.S b/arch/arm/lib/vectors.S index 843b18f920..0cb87cee7f 100644 --- a/arch/arm/lib/vectors.S +++ b/arch/arm/lib/vectors.S @@ -45,11 +45,12 @@ ************************************************************************* */ +_start: + #ifdef CONFIG_SYS_DV_NOR_BOOT_CFG .word CONFIG_SYS_DV_NOR_BOOT_CFG #endif -_start: b reset ldr pc, _undefined_instruction ldr pc, _software_interrupt