Date: Sat, 5 Apr 2014 16:25:08 +0000 From: =?iso-8859-1?B?V2Vp3ywgSvxyZ2Vu?= <weiss@uni-mainz.de> To: "'freebsd-arm@freebsd.org'" <freebsd-arm@freebsd.org> Subject: sleep command with armv6hf Message-ID: <79020061b2a74d8e8d56d47361ca3f4d@e15be-01.zdv.Uni-Mainz.DE>
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under armv6hf the sleep command gives
sleep: nanosleep: Invalid argument
Further investigations seem to indicate the following problem:
sleep calls the function __aeabi_d2lz
vmov r0, r1, d8
bl __aeabi_d2lz
mov r4, r0
mov r5, r1
with the argument in the r0/r1 registers. But the function
in libgcc.a expects the argument in d0 (seems to be
compiled with hardfloat as well).
__aeabi_d2lz:
0: e92d4010 push {r4, lr}
4: ec52cb10 vmov ip, r2, d0
8: e3a000ff mov r0, #255 ; 0xff
c: e59f10a8 ldr r1, [pc, #168] ; bc <__aeabi_d2lz+0xbc>
10: e3800c07 orr r0, r0, #1792 ; 0x700
14: e0004a22 and r4, r0, r2, lsr #20
Besides, when compiling sleep without optimization, the argument
for __aeabi_d2lz by chance is in d0 as well as r0/r1. So this
accidentally works.
Regards
Juergen
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