From a7f99bf139b3aaa0d5494693fd0395084355e41a Mon Sep 17 00:00:00 2001 From: =?utf8?q?Beno=C3=AEt=20Th=C3=A9baudeau?= <benoit.thebaudeau.dev@gmail.com> Date: Wed, 3 Sep 2014 23:32:34 +0200 Subject: [PATCH] arm: Fix _start for CONFIG_SYS_DV_NOR_BOOT_CFG MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 <benoit.thebaudeau.dev@gmail.com> Cc: Albert Aribaud <albert.u.boot@aribaud.net> Cc: Manfred Rudigier <manfred.rudigier@omicron.at> Cc: Christian Riesch <christian.riesch@omicron.at> Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Cc: Heiko Schocher <hs@denx.de> --- arch/arm/lib/vectors.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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 -- 2.39.5