When I compile the following code snippet ( link to playgrounds ):
package main
/*
*/
import "C"
func main() {
C.hci_get_route(nil)
}
... using these environment variables:
CC=arm-linux-gnueabihf-gcc
CGO_ENABLED=1
GOARCH=arm
GOARM=6
I get a 1.6 MB binary, which:
- works on my ODROID-C1 (ARMv7, works Arch, from archlinuxarm.org), but
- doesn't work on my raspberry Pi B + (ARMv6 running on Raspbian, from raspberrypi.org).
When I run it on the Pi, I get a " Segmentation fault".
When I run it with these environment variables:
LD_PRELOAD=/lib/arm-linux-gnueabihf/libSegFault.so
SEGFAULT_USE_ALTSTACK=1
I get this output:
*** Segmentation fault
Register dump:
R0: 00000000 R1: 00000001 R2: bebf37f4 R3: bebf37fc
R4: 00000000 R5: 00000000 R6: 00010c59 R7: 00000000
R8: 00000000 R9: 00000000 SL: b6f33000 FP: 00000000
IP: 0000004f SP: bebf37ec LR: 00010c6b PC: 0005d7f4
CPSR: 40000030
Trap: 0000000e Error: 00000817 OldMask: 00000000
Addr: 00000001
Backtrace:
Memory map:
00010000-00125000 r-xp 00000000 b3:02 16193 /home/pi/test
00135000-0013b000 rw-p 00115000 b3:02 16193 /home/pi/test
0013b000-0014a000 rw-p 00000000 00:00 0
0026b000-00290000 rw-p 00000000 00:00 0 [heap]
b6d53000-b6d73000 r-xp 00000000 b3:02 16080 /lib/arm-linux-gnueabihf/libgcc_s.so.1
b6d73000-b6d7a000 ---p 00020000 b3:02 16080 /lib/arm-linux-gnueabihf/libgcc_s.so.1
b6d7a000-b6d7b000 rw-p 0001f000 b3:02 16080 /lib/arm-linux-gnueabihf/libgcc_s.so.1
b6d7b000-b6e9f000 r-xp 00000000 b3:02 4254 /lib/arm-linux-gnueabihf/libc-2.13.so
b6e9f000-b6ea6000 ---p 00124000 b3:02 4254 /lib/arm-linux-gnueabihf/libc-2.13.so
b6ea6000-b6ea8000 r--p 00123000 b3:02 4254 /lib/arm-linux-gnueabihf/libc-2.13.so
b6ea8000-b6ea9000 rw-p 00125000 b3:02 4254 /lib/arm-linux-gnueabihf/libc-2.13.so
b6ea9000-b6eac000 rw-p 00000000 00:00 0
b6eac000-b6ec0000 r-xp 00000000 b3:02 4247 /lib/arm-linux-gnueabihf/libpthread-2.13.so
b6ec0000-b6ec7000 ---p 00014000 b3:02 4247 /lib/arm-linux-gnueabihf/libpthread-2.13.so
b6ec7000-b6ec8000 r--p 00013000 b3:02 4247 /lib/arm-linux-gnueabihf/libpthread-2.13.so
b6ec8000-b6ec9000 rw-p 00014000 b3:02 4247 /lib/arm-linux-gnueabihf/libpthread-2.13.so
b6ec9000-b6ecb000 rw-p 00000000 00:00 0
b6ecb000-b6ee0000 r-xp 00000000 b3:02 44311 /usr/lib/arm-linux-gnueabihf/libbluetooth.so.3.12.0
b6ee0000-b6ee7000 ---p 00015000 b3:02 44311 /usr/lib/arm-linux-gnueabihf/libbluetooth.so.3.12.0
b6ee7000-b6ee8000 r--p 00014000 b3:02 44311 /usr/lib/arm-linux-gnueabihf/libbluetooth.so.3.12.0
b6ee8000-b6eea000 rw-p 00015000 b3:02 44311 /usr/lib/arm-linux-gnueabihf/libbluetooth.so.3.12.0
b6ef8000-b6efa000 r-xp 00000000 b3:02 25761 /usr/lib/arm-linux-gnueabihf/libcofi_rpi.so
b6efa000-b6f01000 ---p 00002000 b3:02 25761 /usr/lib/arm-linux-gnueabihf/libcofi_rpi.so
b6f01000-b6f02000 rw-p 00001000 b3:02 25761 /usr/lib/arm-linux-gnueabihf/libcofi_rpi.so
b6f02000-b6f04000 r-xp 00000000 b3:02 4246 /lib/arm-linux-gnueabihf/libSegFault.so
b6f04000-b6f0b000 ---p 00002000 b3:02 4246 /lib/arm-linux-gnueabihf/libSegFault.so
b6f0b000-b6f0c000 r--p 00001000 b3:02 4246 /lib/arm-linux-gnueabihf/libSegFault.so
b6f0c000-b6f0d000 rw-p 00002000 b3:02 4246 /lib/arm-linux-gnueabihf/libSegFault.so
b6f0d000-b6f2a000 r-xp 00000000 b3:02 4248 /lib/arm-linux-gnueabihf/ld-2.13.so
b6f2e000-b6f32000 rw-p 00000000 00:00 0
b6f32000-b6f33000 r--p 0001d000 b3:02 4248 /lib/arm-linux-gnueabihf/ld-2.13.so
b6f33000-b6f34000 rw-p 0001e000 b3:02 4248 /lib/arm-linux-gnueabihf/ld-2.13.so
bebd3000-bebf4000 rw-p 00000000 00:00 0
bee7f000-bee80000 r-xp 00000000 00:00 0 [sigpage]
ffff0000-ffff1000 r-xp 00000000 00:00 0 [vectors]
Segmentation fault
Removing /usr/lib/arm-linux-gnueabihf/libcofi_rpi.sofrom /etc/ld.so.preloadgives me the same result, except for the lines containing libcofi_rpi.so.
-tags netgo -a -ldflags "-linkmode external -extldflags -static" "Illegal instruction" "Segmentation fault".
Pi , , . - , ODROID-C1/Arch, Pi/Raspbian.
, , Docker:
$ docker run -it golang:1.4.1-cross bash
:
echo "deb http://emdebian.org/tools/debian/ jessie main" >/etc/apt/sources.list.d/crosstools.list
curl -s http://emdebian.org/tools/debian/emdebian-toolchain-archive.key | apt-key add -
dpkg --add-architecture armhf
apt-get update
apt-get install -y crossbuild-essential-armhf libbluetooth-dev:armhf
export CC=arm-linux-gnueabihf-gcc
export CGO_ENABLED=1
export GOARCH=arm
export GOARM=6
go build -o test test.go
"test", , , Pi.
:
Pi B +:
$ uname -a
Linux raspberrypi 3.18.5+ #744 PREEMPT Fri Jan 30 18:19:07 GMT 2015 armv6l GNU/Linux
$ cat /proc/cpuinfo
processor : 0
model name : ARMv6-compatible processor rev 7 (v6l)
BogoMIPS : 2.00
Features : half thumb fastmult vfp edsp java tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xb76
CPU revision : 7
Hardware : BCM2708
Revision : 0010
Serial : 000000002a69d702
$ ldd test
/usr/lib/arm-linux-gnueabihf/libcofi_rpi.so (0xb6f01000)
libbluetooth.so.3 => /usr/lib/arm-linux-gnueabihf/libbluetooth.so.3 (0xb6ed4000)
libpthread.so.0 => /lib/arm-linux-gnueabihf/libpthread.so.0 (0xb6eb5000)
libc.so.6 => /lib/arm-linux-gnueabihf/libc.so.6 (0xb6d84000)
/lib/ld-linux-armhf.so.3 (0xb6f0e000)
Bluetooth:
$ dpkg -s libbluetooth3
Package: libbluetooth3
Status: install ok installed
Priority: optional
Section: libs
Installed-Size: 172
Maintainer: Debian Bluetooth Maintainers <pkg-bluetooth-maintainers@lists.alioth.debian.org>
Architecture: armhf
Multi-Arch: same
Source: bluez
Version: 4.99-2
Replaces: libsdp2 (<= 1.5-2)
Depends: libc6 (>= 2.13-28)
Pre-Depends: multiarch-support
Conflicts: libsdp2 (<= 1.5-2)
Description: Library to use the BlueZ Linux Bluetooth stack
BlueZ is the official Linux Bluetooth protocol stack. It is an Open Source
project distributed under GNU General Public License (GPL).
Homepage: http://www.bluez.org
ODROID-1:
$ uname -a
Linux alarm 3.10.66-1-ARCH #1 SMP PREEMPT Wed Jan 28 18:12:35 MST 2015 armv7l GNU/Linux
$ cat /proc/cpuinfo
Processor : ARMv7 Processor rev 1 (v7l)
processor : 0
BogoMIPS : 3.27
processor : 1
BogoMIPS : 3.27
processor : 2
BogoMIPS : 3.27
processor : 3
BogoMIPS : 3.27
Features : swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x0
CPU part : 0xc05
CPU revision : 1
Hardware : ODROIDC
Revision : 000a
Serial : 1b00000000000000
$ ldd test
libbluetooth.so.3 => /usr/lib/libbluetooth.so.3 (0xb6eaf000)
libpthread.so.0 => /usr/lib/libpthread.so.0 (0xb6e87000)
libc.so.6 => /usr/lib/libc.so.6 (0xb6d48000)
/lib/ld-linux-armhf.so.3 (0xb6ed1000)
Bluetooth :
$ pacman -Qe bluez
bluez 5.27-1
$ uname -a
Linux 094aa2ed34a5 3.18.5-gentoo-tp
Bluetooth:
$ dpkg -s libbluetooth-dev:armhf
Package: libbluetooth-dev
Status: install ok installed
Priority: extra
Section: libdevel
Installed-Size: 429
Maintainer: Debian Bluetooth Maintainers <pkg-bluetooth-maintainers@lists.alioth.debian.org>
Architecture: armhf
Source: bluez (5.23-2)
Version: 5.23-2+b1
Replaces: libsdp2-dev (<= 1.5.2)
Provides: libbluetooth3-dev
Depends: libbluetooth3 (= 5.23-2+b1), libc6-dev | libc-dev
Suggests: pkg-config
Conflicts: bluez-pan, libbluetooth-dev, libsdp2-dev (<= 1.5.2)
Description: Development files for using the BlueZ Linux Bluetooth library
BlueZ is the official Linux Bluetooth protocol stack. It is an Open Source
project distributed under GNU General Public License (GPL).
Homepage: http://www.bluez.org
libbluetooth-dev Docker, , Pi, .
libbluetooth.so Jessie to Wheezie :
./test: /lib/arm-linux-gnueabihf/libc.so.6: version `GLIBC_2.15' not found (required by /home/pi/libbluetooth.so.3.17.11)
UPDATE:
Arch Pi, segfaults, ( "Illegal instruction (core dumped)" ) GOARM=5, 6 7.
CGO Pi, libbluetooth.
Pi 2.