>
> *Dean,*
>
> * Looks like you found where to put libEBBLibrary.so...*
>
> * open("/lib/arm-linux-gnueabihf/libEBBLibrary.so", O_RDONLY|O_CLOEXEC) =
> 3*
>
> * Apparently the LCD is attached via SPI? The code is trying to open
> /dev/spidev2.0, but it's not there.*
>
> * open("/dev/spidev2.0", O_RDWR) = -1 ENOENT (No such file or directory)*
>
> * Likely has to be enabled via devicetree.*
>
Yeah there are many reason why this can fail. Robert named one, you named
another here, and I'll name yet another which could be that application
needs elevated permissions to run( and no elevated permissions were granted
). There are even more possibilities . . .
On Sun, Jan 24, 2016 at 4:46 PM, Mike <bellyac...@gmail.com> wrote:
> On 01/24/2016 06:04 PM, Dean wrote:
>
> I am trying to decipher my strace. My setup is Linux beaglebone
> 4.1.12-ti-r29 #1 SMP PREEMPT Mon Nov 9 22:46:19 UTC 2015 armv7l GNU/Linux
> BeagleBoard.org Debian Image 2015-11-12. I am not sure on how to interpet
> my findings. In particular of the files that are missing is that because I
> need an update or do they arise out a make file that simply is not working
> or incorrect. The CMake version that I am using is 3.0.2. Thanks for
> replies in advance.
>
>
>
> execve("./LCDApp", ["./LCDApp"], [/* 19 vars */]) = 0
>
> brk(0) = 0x4bf000
>
> uname({sys="Linux", node="beaglebone", ...}) = 0
>
> access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
>
> mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
> = 0xb6f95000
>
> access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
>
> open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
>
> fstat64(3, {st_mode=S_IFREG|0644, st_size=26752, ...}) = 0
>
> mmap2(NULL, 26752, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb6f8e000
>
> close(3) = 0
>
> access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
>
> open("/lib/arm-linux-gnueabihf/tls/v7l/neon/vfp/libEBBLibrary.so",
> O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
>
> stat64("/lib/arm-linux-gnueabihf/tls/v7l/neon/vfp", 0xbea01370) = -1
> ENOENT (No such file or directory)
>
> open("/lib/arm-linux-gnueabihf/tls/v7l/neon/libEBBLibrary.so",
> O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
>
> open("/lib/arm-linux-gnueabihf/libEBBLibrary.so", O_RDONLY|O_CLOEXEC) = 3
>
> read(3,
> "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0`m\0\0004\0\0\0"..., 512) =
> 512
>
> lseek(3, 95252, SEEK_SET) = 95252
>
> read(3,
> "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
> 1200) = 1200
>
> lseek(3, 63425, SEEK_SET) = 63425
>
> read(3, "A2\0\0\0aeabi\0\1(\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\4\22"..., 51)
> = 51
>
> fstat64(3, {st_mode=S_IFREG|0755, st_size=96452, ...}) = 0
>
> mmap2(NULL, 128964, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0)
> = 0xb6f50000
>
> mprotect(0xb6f5f000, 65536, PROT_NONE) = 0
>
> mmap2(0xb6f6f000, 4096, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0xb6f6f000
>
> close(3) = 0
>
> access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
>
> open("/usr/lib/arm-linux-gnueabihf/libstdc++.so.6", O_RDONLY|O_CLOEXEC) =
> 3
>
> read(3, "\177ELF\1\1\1\3\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0
> n\4\0004\0\0\0"..., 512) = 512
>
> open("/lib/arm-linux-gnueabihf/libEBBLibrary.so", O_RDONLY|O_CLOEXEC) = 3
>
> read(3,
> "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0`m\0\0004\0\0\0"..., 512) =
> 512
>
> lseek(3, 95252, SEEK_SET) = 95252
>
> read(3,
> "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
> 1200) = 1200
>
> lseek(3, 63425, SEEK_SET) = 63425
>
> read(3, "A2\0\0\0aeabi\0\1(\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\4\22"..., 51)
> = 51
>
> fstat64(3, {st_mode=S_IFREG|0755, st_size=96452, ...}) = 0
>
> mmap2(NULL, 128964, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0)
> = 0xb6f50000
>
> mprotect(0xb6f5f000, 65536, PROT_NONE) = 0
>
> mmap2(0xb6f6f000, 4096, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0xb6f6f000
>
> close(3) = 0
>
> access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory)
>
> open("/usr/lib/arm-linux-gnueabihf/libstdc++.so.6", O_RDONLY|O_CLOEXEC) =
> 3
>
> read(3, "\177ELF\1\1\1\3\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0
> n\4\0004\0\0\0"..., 512) = 512
>
> lseek(3, 100684, SEEK_SET) = 100684
>
> read(3,
> "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
> 1520) = 1520
>
> lseek(3, 65940, SEEK_SET) = 65940
>
> read(3, "A4\0\0\0aeabi\0\1*\0\0\0\0057-A\0\6\n\7A\10\1\t\2\n\4\22"..., 53)
> = 53
>
> fstat64(3, {st_mode=S_IFREG|0755, st_size=102204, ...}) = 0
>
> mmap2(NULL, 139836, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0)
> = 0xb6ceb000
>
> mprotect(0xb6cfb000, 61440, PROT_NONE) = 0
>
> mmap2(0xb6d0a000, 8192, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf000) = 0xb6d0a000
>
> mmap2(0xb6d0c000, 4668, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb6d0c000
>
> close(3) = 0
>
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
> = 0xb6f8c000
>
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
> = 0xb6f8b000
>
> set_tls(0xb6f8b4c0, 0xb6f98050, 0xb6f8bbb8, 0xb6f8b4c0, 0xb6f98050) = 0
>
> mprotect(0xb6df6000, 8192, PROT_READ) = 0
>
> mprotect(0xb6d0a000, 4096, PROT_READ) = 0
>
> mprotect(0xb6e97000, 4096, PROT_READ) = 0
>
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
> = 0xb6f8a000
>
> mprotect(0xb6f44000, 16384, PROT_READ) = 0
>
> mprotect(0xb6f97000, 4096, PROT_READ) = 0
>
> munmap(0xb6f8e000, 26752) = 0
>
> set_tid_address(0xb6f8b068) = 650
>
> set_robust_list(0xb6f8b070, 12) = 0
>
> rt_sigaction(SIGRTMIN, {0xb6cefd9d, [], SA_RESTORER|SA_SIGINFO,
> 0xb6d34ae1}, NULL, 8) = 0
>
> rt_sigaction(SIGRT_1, {0xb6cefcbd, [], SA_RESTORER|SA_RESTART|SA_SIGINFO,
> 0xb6d34ae1}, NULL, 8) = 0
>
> rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
>
> getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0
>
> futex(0xb6f4ece8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
>
> futex(0xb6f4ecdc, FUTEX_WAKE_PRIVATE, 2147483647) = 0
>
> fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
>
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
> = 0xb6f94000
>
> mprotect(0xb6df6000, 8192, PROT_READ) = 0
>
> mprotect(0xb6d0a000, 4096, PROT_READ) = 0
>
> mprotect(0xb6e97000, 4096, PROT_READ) = 0
>
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
> = 0xb6f8a000
>
> mprotect(0xb6f44000, 16384, PROT_READ) = 0
>
> mprotect(0xb6f97000, 4096, PROT_READ) = 0
>
> munmap(0xb6f8e000, 26752) = 0
>
> set_tid_address(0xb6f8b068) = 650
>
> set_robust_list(0xb6f8b070, 12) = 0
>
> rt_sigaction(SIGRTMIN, {0xb6cefd9d, [], SA_RESTORER|SA_SIGINFO,
> 0xb6d34ae1}, NULL, 8) = 0
>
> rt_sigaction(SIGRT_1, {0xb6cefcbd, [], SA_RESTORER|SA_RESTART|SA_SIGINFO,
> 0xb6d34ae1}, NULL, 8) = 0
>
> rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0
>
> getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0
>
> futex(0xb6f4ece8, FUTEX_WAKE_PRIVATE, 2147483647) = 0
>
> futex(0xb6f4ecdc, FUTEX_WAKE_PRIVATE, 2147483647) = 0
>
> fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
>
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
> = 0xb6f94000
>
> write(1, "Starting EBB LCD Character Displ"..., 43) = 43
>
> brk(0) = 0x4bf000
>
> brk(0x4e0000) = 0x4e0000
>
> open("/dev/spidev2.0", O_RDWR) = -1 ENOENT (No such file or directory)
>
> dup(2) = 3
>
> fcntl64(3, F_GETFL) = 0x402 (flags O_RDWR|O_APPEND)
>
> fstat64(3, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
>
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
> = 0xb6f93000
>
> _llseek(3, 0, 0xbea01838, SEEK_CUR) = -1 ESPIPE (Illegal seek)
>
> write(3, "SPI: Can't open device.: No such"..., 51) = 51
>
> close(3) = 0
>
> munmap(0xb6f93000, 4096) = 0
>
> ioctl(-1, 0x40046b04, 0x4bf024) = -1 EBADF (Bad file descriptor)
>
> dup(2) = 3
>
> fcntl64(3, F_GETFL) = 0x402 (flags O_RDWR|O_APPEND)
>
> fstat64(3, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
>
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
> = 0xb6f93000
>
> _llseek(3, 0, 0xbea01968, SEEK_CUR) = -1 ESPIPE (Illegal seek)
>
> write(3, "SPI: Can't set max speed HZ: Bad"..., 49) = 49
>
> lose(3) = 0
>
> munmap(0xb6f93000, 4096) = 0
>
> ioctl(-1, 0x40206b00, 0xbea01a30) = -1 EBADF (Bad file descriptor)
>
> dup(2) = 3
>
> fcntl64(3, F_GETFL) = 0x402 (flags O_RDWR|O_APPEND)
>
> fstat64(3, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
>
> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
> = 0xb6f93000
>
> _llseek(3, 0, 0xbea01910, SEEK_CUR) = -1 ESPIPE (Illegal seek)
>
> write(3, "SPI: SPI_IOC_MESSAGE Failed: Bad"..., 49) = 49
>
> close(3) = 0
>
> munmap(0xb6f93000, 4096) = 0
> --
> For more options, visit http://beagleboard.org/discuss
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>
> Dean,
>
> Looks like you found where to put libEBBLibrary.so...
>
> open("/lib/arm-linux-gnueabihf/libEBBLibrary.so", O_RDONLY|O_CLOEXEC) = 3
>
> Apparently the LCD is attached via SPI? The code is trying to open
> /dev/spidev2.0, but it's not there.
>
> open("/dev/spidev2.0", O_RDWR) = -1 ENOENT (No such file or directory)
>
> Likely has to be enabled via devicetree.
>
> Mike
>
> --
> For more options, visit http://beagleboard.org/discuss
> ---
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>
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