Hello,
when building imx_v7_defconfig and then looking at
images/start_imx6_gk802.pbl (several more are affected, too), I get:
$ objdump -d images/start_imx6_gk802.pbl
00000000 <start_imx6_gk802>:
0: e28f9001 add r9, pc, #1
4: e12fff19 bx r9
8: f000 f822 bl 50 <start_imx6_gk802+0x50>
...
50: f000 f850 bl f4 <__start_imx6_gk802>
...
f4: f000 f80c bl 110 <imx6_cpu_lowlevel_init>
...
110: b508 push {r3, lr}
That is the sp register is used here without being initialized. I guess
this didn't break up to now because when barebox is jumped into, sp
was already used by the boot rom and still points into SRAM.
Still I think this is worth to be fixed. I think this means that
imx6_cpu_lowlevel_init must be marked __naked and lr must be saved into
a register that is preserved by the functions called by
imx6_cpu_lowlevel_init.
Sounds reasonable?
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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