When I build hello_world application along with u-boot for ARM mode, it executes fine on target, But, when I build it for THUMB mode, it generates "undefined instruction" exception.
Thank you.
On Fri, Dec 20, 2013 at 8:38 AM, Zhenqiang Chen zhenqiang.chen@linaro.orgwrote:
On 19 December 2013 13:36, Parimala Baggiri baggiriparimala@gmail.com wrote:
Hello,
I am using the pre-built toolchain gcc-arm-none-eabi-4_6-2012q2 from
linaro
to compile u-boot (u-boot-linaro-stable) and to compile my standalone applications to run on target(PandaBoard ES rev b2)
hello_world standalone application which comes with u-boot is executing
fine
on target when I disable CONFIG_SYS_THUMB_BUILD, but when I enable it, target gets reset with following information
How do you build your hello_world? Is it ARM or THUMB?
Panda # go 82000000 hello ## Starting application at 0x82000000 ... undefined instruction pc : [<8200000c>] lr : [<bff83147>] sp : bfeffe40 ip : bfeffc10 fp : 00000000 r10: 00000003 r9 : bffac954 r8 : bfefff68 r7 : bff01d88 r6 : 82000000 r5 : bff01d8c r4 : 00000003 r3 : 82000000 r2 : bff01d8c r1 : bff01d8c r0 : 00000002 Flags: nzCv IRQs off FIQs off Mode SVC_32 Resetting CPU ...
resetting ...
U-Boot SPL 2013.01.-rc1-g0f45941 (Dec 17 2013 - 14:23:41) OMAP4460 ES1.1 OMAP SD/MMC: 0 reading u-boot.img reading u-boot.bin reading u-boot.bin
......
Can anyone please help me why thumb mode build is failing?
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