I am doing my first port to an ARM CPU (Broadcom chip). For testing I
built the friendlyarm-tiny210 and created an objdump to see what the
code look like:
barebox: file format elf32-littlearm
Disassembly of section .text:
23e00000 <start>:
23e00000: ea000012 b 23e00050 <start+0x50>
...
23e00050: ea000013 b 23e000a4 <barebox_arm_reset_vector>
...
23e000a4 <barebox_arm_reset_vector>:
23e000a4: e52de004 push {lr} ; (str lr, [sp, #-4]!)
I am a bit surprise to see a push to stack as the first instruction of
barebox_arm_reset_vector as the stack pointer has not been defined yet.
Or is there a pre boot loader that is not built as part of the
friendlyarm-tiny210 build.
Other BSP I have built do not produce this push instruction.
Where is the difference coming from in the build?
Are all BSP having a lowlevel.c file assumed to have a pre-bootloader?
Cheers,
R.
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