Here is strace from starting weston:
execve("/usr/bin/weston", ["/usr/bin/weston", "--idle-time=0", "--current-mode", "--tty=1", "--log=/run/platform/display/west"...], 0xffffcbc51410 /* 9 vars */) = 0
brk(NULL) = 0xaaaaec4cd000
faccessat(AT_FDCWD, "/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=46983, ...}) = 0
mmap(NULL, 46983, PROT_READ, MAP_PRIVATE, 3, 0) = 0xffff8f092000
close(3) = 0
openat(AT_FDCWD, "/usr/lib/libweston-6.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\260\355\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=256784, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff8f090000
mmap(NULL, 320472, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8f022000
mprotect(0xffff8f05d000, 61440, PROT_NONE) = 0
mmap(0xffff8f06c000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3a000) = 0xffff8f06c000
close(3) = 0
openat(AT_FDCWD, "/usr/lib/libwayland-server.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\220i\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=80488, ...}) = 0
mmap(NULL, 144336, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8effe000
mprotect(0xffff8f010000, 61440, PROT_NONE) = 0
mmap(0xffff8f01f000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x11000) = 0xffff8f01f000
close(3) = 0
openat(AT_FDCWD, "/lib/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\240\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=14520, ...}) = 0
mmap(NULL, 78072, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8efea000
mprotect(0xffff8efed000, 61440, PROT_NONE) = 0
mmap(0xffff8effc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff8effc000
close(3) = 0
openat(AT_FDCWD, "/usr/lib/libinput.so.10", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0@\214\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=236608, ...}) = 0
mmap(NULL, 300216, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8efa0000
mprotect(0xffff8efd9000, 61440, PROT_NONE) = 0
mmap(0xffff8efe8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x38000) = 0xffff8efe8000
close(3) = 0
openat(AT_FDCWD, "/usr/lib/libevdev.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\240\247\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=108472, ...}) = 0
mmap(NULL, 172080, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8ef75000
mprotect(0xffff8ef8a000, 61440, PROT_NONE) = 0
mmap(0xffff8ef99000, 28672, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14000) = 0xffff8ef99000
close(3) = 0
openat(AT_FDCWD, "/lib/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\220c\0\0\0\0\0\0"..., 832) = 832
execve("/usr/bin/weston", ["/usr/bin/weston", "--idle-time=0", "--current-mode", "--tty=1", "--log=/run/platform/display/west"...], 0xffffcbc51410 /* 9 vars */) = 0
brk(NULL) = 0xaaaaec4cd000
faccessat(AT_FDCWD, "/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=46983, ...}) = 0
mmap(NULL, 46983, PROT_READ, MAP_PRIVATE, 3, 0) = 0xffff8f092000
close(3) = 0
openat(AT_FDCWD, "/usr/lib/libweston-6.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\260\355\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=256784, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffff8f090000
mmap(NULL, 320472, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8f022000
mprotect(0xffff8f05d000, 61440, PROT_NONE) = 0
mmap(0xffff8f06c000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3a000) = 0xffff8f06c000
close(3) = 0
openat(AT_FDCWD, "/usr/lib/libwayland-server.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\220i\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=80488, ...}) = 0
mmap(NULL, 144336, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8effe000
mprotect(0xffff8f010000, 61440, PROT_NONE) = 0
mmap(0xffff8f01f000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x11000) = 0xffff8f01f000
close(3) = 0
openat(AT_FDCWD, "/lib/libdl.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\240\16\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=14520, ...}) = 0
mmap(NULL, 78072, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8efea000
mprotect(0xffff8efed000, 61440, PROT_NONE) = 0
mmap(0xffff8effc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0xffff8effc000
close(3) = 0
openat(AT_FDCWD, "/usr/lib/libinput.so.10", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0@\214\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=236608, ...}) = 0
mmap(NULL, 300216, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8efa0000
mprotect(0xffff8efd9000, 61440, PROT_NONE) = 0
mmap(0xffff8efe8000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x38000) = 0xffff8efe8000
close(3) = 0
openat(AT_FDCWD, "/usr/lib/libevdev.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\240\247\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=108472, ...}) = 0
mmap(NULL, 172080, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffff8ef75000
mprotect(0xffff8ef8a000, 61440, PROT_NONE) = 0
mmap(0xffff8ef99000, 28672, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14000) = 0xffff8ef99000
close(3) = 0
openat(AT_FDCWD, "/lib/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\220c\0\0\0\0\0\0"..., 832) = 832
and "journalctl"
Jan 27 06:18:03 salvator-x kernel: Booting Linux on physical CPU 0x0
Jan 27 06:18:03 salvator-x kernel: Linux version 4.14.75-ltsi-yocto-standard (oe-user@oe-host) (gcc version 8.2.0 (GCC)) #1 SMP PREEMPT Mon Jan 27 06:55:50 UTC 2020
Jan 27 06:18:03 salvator-x kernel: Boot CPU: AArch64 Processor [411fd073]
Jan 27 06:18:03 salvator-x kernel: Machine model: Renesas Salvator-X 2nd version board based on r8a7796 ES3.0+ with 8GiB (2 x 4 GiB)
Jan 27 06:18:03 salvator-x kernel: debug: ignoring loglevel setting.
Jan 27 06:18:03 salvator-x kernel: efi: Getting EFI parameters from FDT:
Jan 27 06:18:03 salvator-x kernel: efi: UEFI not found.
Jan 27 06:18:03 salvator-x kernel: Reserved memory: created CMA memory pool at 0x0000000057000000, size 16 MiB
Jan 27 06:18:03 salvator-x kernel: OF: reserved mem: initialized node linux,adsp@57000000, compatible id shared-dma-pool
Jan 27 06:18:03 salvator-x kernel: Reserved memory: created CMA memory pool at 0x0000000058000000, size 384 MiB
Jan 27 06:18:03 salvator-x kernel: OF: reserved mem: initialized node linux,cma@58000000, compatible id shared-dma-pool
Jan 27 06:18:03 salvator-x kernel: Reserved memory: created CMA memory pool at 0x0000000070000000, size 256 MiB
Jan 27 06:18:03 salvator-x kernel: OF: reserved mem: initialized node linux,multimedia@70000000, compatible id shared-dma-pool
Jan 27 06:18:03 salvator-x kernel: NUMA: No NUMA configuration found
Jan 27 06:18:03 salvator-x kernel: NUMA: Faking a node at [mem 0x0000000000000000-0x00000006ffffffff]
Jan 27 06:18:03 salvator-x kernel: NUMA: NODE_DATA [mem 0x6fff8ac80-0x6fff8c77f]
Jan 27 06:18:03 salvator-x kernel: Zone ranges:
Jan 27 06:18:03 salvator-x kernel: DMA [mem 0x0000000048000000-0x00000000ffffffff]
Jan 27 06:18:03 salvator-x kernel: Normal [mem 0x0000000100000000-0x00000006ffffffff]
Jan 27 06:18:03 salvator-x kernel: Movable zone start for each node
Jan 27 06:18:03 salvator-x kernel: Early memory node ranges
Jan 27 06:18:03 salvator-x kernel: node 0: [mem 0x0000000048000000-0x0000000053ffffff]
Jan 27 06:18:03 salvator-x kernel: node 0: [mem 0x0000000057000000-0x00000000bfffffff]
Jan 27 06:18:03 salvator-x kernel: node 0: [mem 0x0000000480000000-0x00000004ffffffff]
Jan 27 06:18:03 salvator-x kernel: node 0: [mem 0x0000000600000000-0x00000006ffffffff]
Jan 27 06:18:03 salvator-x kernel: Initmem setup node 0 [mem 0x0000000048000000-0x00000006ffffffff]
Jan 27 06:18:03 salvator-x kernel: On node 0 totalpages: 2052096
Jan 27 06:18:03 salvator-x kernel: DMA zone: 7488 pages used for memmap
Jan 27 06:18:03 salvator-x kernel: DMA zone: 0 pages reserved
Jan 27 06:18:03 salvator-x kernel: DMA zone: 479232 pages, LIFO batch:31
Jan 27 06:18:03 salvator-x kernel: Normal zone: 24576 pages used for memmap
Jan 27 06:18:03 salvator-x kernel: Normal zone: 1572864 pages, LIFO batch:31
Jan 27 06:18:03 salvator-x kernel: psci: probing for conduit method from DT.
Jan 27 06:18:03 salvator-x kernel: psci: PSCIv1.1 detected in firmware.
Jan 27 06:18:03 salvator-x kernel: psci: Using standard PSCI v0.2 function IDs
Jan 27 06:18:03 salvator-x kernel: psci: Trusted OS resident on physical CPU 0x0
Jan 27 06:18:03 salvator-x kernel: psci: SMC Calling Convention v1.1
Jan 27 06:18:03 salvator-x kernel: percpu: Embedded 24 pages/cpu @ffff8006bfef5000 s57624 r8192 d32488 u98304
Jan 27 06:18:03 salvator-x kernel: pcpu-alloc: s57624 r8192 d32488 u98304 alloc=24*4096
Jan 27 06:18:03 salvator-x kernel: pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3 [0] 4 [0] 5
Jan 27 06:18:03 salvator-x kernel: Detected PIPT I-cache on CPU0
Jan 27 06:18:03 salvator-x kernel: Speculative Store Bypass Disable mitigation not required
Jan 27 06:18:03 salvator-x kernel: Built 1 zonelists, mobility grouping on. Total pages: 2020032
Jan 27 06:18:03 salvator-x kernel: Policy zone: Normal
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