Hybris linker not used on aarch64/AOSP10 based port

For example, Angelfish not HW accelerated on aarch64/AOSP10 based port. On the basis of chrome://gpu, there is no hardware acceleration. Tested on Sony Tama

Looks like hybris is not used. When forcing its use via

flatpak-runner --env=LD_LIBRARY_PATH=/usr/lib/aarch64-linux-gnu/GL/host/lib64 \
 --filesystem=host org.kde.mobile.angelfish

application will exit with error. Looking through strace, we have no loading of hybris linker:

openat(AT_FDCWD, "/usr/lib/aarch64-linux-gnu/GL/host/lib64/libwayland-egl.so.1", O_RDONLY|O_CLOEXEC) = 9
read(9, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0P\6\0\0\0\0\0\0"..., 832) = 832
fstat(9, {st_mode=S_IFREG|0755, st_size=67464, ...}) = 0
mmap(NULL, 131120, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 9, 0) = 0x773fdfe000
mprotect(0x773fdff000, 122880, PROT_NONE) = 0
mmap(0x773fe1d000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 9, 0xf000) = 0x773fe1d000
close(9)                                = 0
openat(AT_FDCWD, "/usr/lib/aarch64-linux-gnu/GL/host/lib64/libhardware.so.2", O_RDONLY|O_CLOEXEC) = 9
read(9, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\20\6\0\0\0\0\0\0"..., 832) = 832
fstat(9, {st_mode=S_IFREG|0755, st_size=67520, ...}) = 0
mmap(NULL, 131144, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 9, 0) = 0x773fddd000
mprotect(0x773fdde000, 122880, PROT_NONE) = 0
mmap(0x773fdfc000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 9, 0xf000) = 0x773fdfc000
close(9)                                = 0
mprotect(0x773fdfc000, 4096, PROT_READ) = 0
mprotect(0x773fe1d000, 4096, PROT_READ) = 0
mprotect(0x773fe3e000, 4096, PROT_READ) = 0
mprotect(0x773fe5e000, 4096, PROT_READ) = 0
fstat(2, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
lseek(2, 0, SEEK_CUR)                   = -1 ESPIPE (Illegal seek)
write(2, "/app/bin/angelfish: symbol looku"..., 163/app/bin/angelfish: symbol lookup error: /usr/lib/plugins/wayland-graphics-integration-client/libqt-plugin-wayland-egl.so: undefined symbol: eglGetPlatformDisplay
) = 163
exit_group(127)                         = ?
+++ exited with 127 +++
[D] expression for onExit:59 - Skipping quit as it will hang the window. Proper exit is needed

From strace, looks like linker is not engaged at all as it is not looked for nor loaded

strace with full arguments

flatpak-runner --devel --env=LD_LIBRARY_PATH=/usr/lib/aarch64-linux-gnu/GL/host/lib64 --filesystem=host  \
  --command=strace org.kde.mobile.angelfish -v -s 1024 /app/bin/angelfish

...

openat(AT_FDCWD, "/usr/lib/aarch64-linux-gnu/GL/host/lib64/libwayland-egl.so.1", O_RDONLY|O_CLOEXEC) = 9
read(9, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0P\6\0\0\0\0\0\0@\0\0\0\0\0\0\0H\1\1\0\0\0\0\0\0\0\0\0@\08\0\7\0@\0\31\0\30\0\1\0\0\0\5\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@\t\0\0\0\0\0\0@\t\0\0\0\0\0\0\0\0\1\0\0\0\0\0\1\0\0\0\6\0\0\0\320\375\0\0\0\0\0\0\320\375\1\0\0\0\0\0\320\375\1\0\0\0\0\0X\2\0\0\0\0\0\0`\2\0\0\0\0\0\0\0\0\1\0\0\0\0\0\2\0\0\0\6\0\0\0\340\375\0\0\0\0\0\0\340\375\1\0\0\0\0\0\340\375\1\0\0\0\0\0\340\1\0\0\0\0\0\0\340\1\0\0\0\0\0\0\10\0\0\0\0\0\0\0\4\0\0\0\4\0\0\0\310\1\0\0\0\0\0\0\310\1\0\0\0\0\0\0\310\1\0\0\0\0\0\0$\0\0\0\0\0\0\0$\0\0\0\0\0\0\0\4\0\0\0\0\0\0\0P\345td\4\0\0\0\4\10\0\0\0\0\0\0\4\10\0\0\0\0\0\0\4\10\0\0\0\0\0\0L\0\0\0\0\0\0\0L\0\0\0\0\0\0\0\4\0\0\0\0\0\0\0Q\345td\6\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\0\0\0\0\0\0\0\0\0\0\0\20\0\0\0\0\0\0\0R\345td\4\0\0\0\320\375\0\0\0\0\0\0\320\375\1\0\0\0\0\0\320\375\1\0\0\0\0\0000\2\0\0\0\0\0\0000\2\0\0\0\0\0\0\1\0\0\0\0\0\0\0\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\31\325>f9\361\215ee)%3RC\353)'ft\21\0\0\0\0\3\0\0\0\r\0\0\0\6\0\0\0\10\0\0\0\t\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\3\0\0\0\0\0\0\0\n\0\0\0\v\0\0\0\4\0\0\0\f\0\0\0\7\0\0\0\5\0\0\0\3\0\0\0\t\0\0\0\1\0\0\0\6\0\0\0\200\2\4\4@\20\0\300\t\0\0\0\n\0\0\0\f\0\0\0\255\24\6\f\276\37\241b\207Y_\f\211fE\352\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\3\0\n\0\330\5\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\3\0\25\0 \0\2\0\0\0\0\0\0\0\0\0\0\0\0\0\20\0\0\0 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0F\0\0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\177\0\0\0\22\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\0\0\0 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\234\0\0\0\22\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\0", 832) = 832
fstat(9, {st_dev=makedev(0xfc, 0x1), st_ino=469403, st_mode=S_IFREG|0755, st_nlink=1, st_uid=100000, st_gid=100000, st_blksize=4096, st_blocks=136, st_size=67464, st_atime=1620316253 /* 2021-05-06T15:50:53.415958475+0000 */, st_atime_nsec=415958475, st_mtime=1610937285 /* 2021-01-18T02:34:45+0000 */, st_mtime_nsec=0, st_ctime=1620316253 /* 2021-05-06T15:50:53.415958475+0000 */, st_ctime_nsec=415958475}) = 0
mmap(NULL, 131120, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 9, 0) = 0x793cf93000
mprotect(0x793cf94000, 122880, PROT_NONE) = 0
mmap(0x793cfb2000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 9, 0xf000) = 0x793cfb2000
close(9)                                = 0
openat(AT_FDCWD, "/usr/lib/aarch64-linux-gnu/GL/host/lib64/libhardware.so.2", O_RDONLY|O_CLOEXEC) = 9
read(9, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\20\6\0\0\0\0\0\0@\0\0\0\0\0\0\0@\1\1\0\0\0\0\0\0\0\0\0@\08\0\7\0@\0\32\0\31\0\1\0\0\0\5\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\354\t\0\0\0\0\0\0\354\t\0\0\0\0\0\0\0\0\1\0\0\0\0\0\1\0\0\0\6\0\0\0\220\375\0\0\0\0\0\0\220\375\1\0\0\0\0\0\220\375\1\0\0\0\0\0\230\2\0\0\0\0\0\0\270\2\0\0\0\0\0\0\0\0\1\0\0\0\0\0\2\0\0\0\6\0\0\0\240\375\0\0\0\0\0\0\240\375\1\0\0\0\0\0\240\375\1\0\0\0\0\0 \2\0\0\0\0\0\0 \2\0\0\0\0\0\0\10\0\0\0\0\0\0\0\4\0\0\0\4\0\0\0\310\1\0\0\0\0\0\0\310\1\0\0\0\0\0\0\310\1\0\0\0\0\0\0$\0\0\0\0\0\0\0$\0\0\0\0\0\0\0\4\0\0\0\0\0\0\0P\345td\4\0\0\0\230\10\0\0\0\0\0\0\230\10\0\0\0\0\0\0\230\10\0\0\0\0\0\0D\0\0\0\0\0\0\0D\0\0\0\0\0\0\0\4\0\0\0\0\0\0\0Q\345td\6\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\0\0\0\0\0\0\0\0\0\0\0\20\0\0\0\0\0\0\0R\345td\4\0\0\0\220\375\0\0\0\0\0\0\220\375\1\0\0\0\0\0\220\375\1\0\0\0\0\0p\2\0\0\0\0\0\0p\2\0\0\0\0\0\0\1\0\0\0\0\0\0\0\4\0\0\0\24\0\0\0\3\0\0\0GNU\0D\21b\312\301\36\25&W\213\317&\16\3\0234\215\363\274!\0\0\0\0\3\0\0\0\v\0\0\0\7\0\0\0\10\0\0\0\6\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\n\0\0\0\4\0\0\0\0\0\0\0\5\0\0\0\3\0\0\0\t\0\0\0\2\0\0\0\t\0\0\0\1\0\0\0\6\0\0\0\0\0\200\4\0\3\0\0\t\0\0\0\n\0\0\0i\232|$\227f\23\342\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\3\0\n\0\230\5\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\3\0\26\0 \0\2\0\0\0\0\0\0\0\0\0\0\0\0\0\20\0\0\0 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0F\0\0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0r\0\0\0\22\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0U\0\0\0\22\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\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\0\0\0\0\0\0\0\0\0\0\0\0d\0\0\0\22\0\f\0\10\7\0\0\0\0\0\0", 832) = 832
fstat(9, {st_dev=makedev(0xfc, 0x1), st_ino=469389, st_mode=S_IFREG|0755, st_nlink=1, st_uid=100000, st_gid=100000, st_blksize=4096, st_blocks=136, st_size=67520, st_atime=1620316253 /* 2021-05-06T15:50:53.248958475+0000 */, st_atime_nsec=248958475, st_mtime=1619957353 /* 2021-05-02T12:09:13+0000 */, st_mtime_nsec=0, st_ctime=1620316253 /* 2021-05-06T15:50:53.248958475+0000 */, st_ctime_nsec=248958475}) = 0
mmap(NULL, 131144, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 9, 0) = 0x793cf72000
mprotect(0x793cf73000, 122880, PROT_NONE) = 0
mmap(0x793cf91000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 9, 0xf000) = 0x793cf91000
close(9)                                = 0
mprotect(0x793cf91000, 4096, PROT_READ) = 0
mprotect(0x793cfb2000, 4096, PROT_READ) = 0
mprotect(0x793cfd3000, 4096, PROT_READ) = 0
mprotect(0x793cff3000, 4096, PROT_READ) = 0
fstat(2, {st_dev=makedev(0, 0xb), st_ino=234025, st_mode=S_IFIFO|0600, st_nlink=1, st_uid=100000, st_gid=100000, st_blksize=4096, st_blocks=0, st_size=0, st_atime=1620469773 /* 2021-05-08T10:29:33.019251473+0000 */, st_atime_nsec=19251473, st_mtime=1620469773 /* 2021-05-08T10:29:33.023254852+0000 */, st_mtime_nsec=23254852, st_ctime=1620469773 /* 2021-05-08T10:29:33.023254852+0000 */, st_ctime_nsec=23254852}) = 0
lseek(2, 0, SEEK_CUR)                   = -1 ESPIPE (Illegal seek)
write(2, "/app/bin/angelfish: symbol lookup error: /usr/lib/plugins/wayland-graphics-integration-client/libqt-plugin-wayland-egl.so: undefined symbol: eglGetPlatformDisplay\n", 163/app/bin/angelfish: symbol lookup error: /usr/lib/plugins/wayland-graphics-integration-client/libqt-plugin-wayland-egl.so: undefined symbol: eglGetPlatformDisplay
) = 163
exit_group(127)                         = ?

issue was in the absence of eglGetPlatformDisplay in libhybris. So, to get it loaded, it has to be defined. Mal and Thaodan suggested to test https://github.com/libhybris/libhybris/pull/469 . It required addition of https://github.com/libhybris/libhybris/commit/2d40517ca87786a1b979d83c6fa1123220d468f1 (hybris/egl/egl.c part), except eglGetPlatformDisplay.

While hybris does load, application is not showing anything in flatpak-runner. It also crashes with

Thread 1 "angelfish" received signal SIGBUS, Bus error.
0x0000000000000003 in ?? ()

Thread 2 (Thread 0x7fb33d8f20 (LWP 8)):
#0  0x0000007fb85a9cd4 in poll () from /usr/lib/aarch64-linux-gnu/libc.so.6
#1  0x0000007fb46fd46c in g_main_context_iterate.constprop () from /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#2  0x0000007fb46fd594 in g_main_context_iteration () from /usr/lib/aarch64-linux-gnu/libglib-2.0.so.0
#3  0x0000007fb8a9f618 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/aarch64-linux-gnu/libQt5Core.so.5
#4  0x0000007fb8a5fcd0 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/aarch64-linux-gnu/libQt5Core.so.5
#5  0x0000007fb891cf24 in QThread::exec() () from /usr/lib/aarch64-linux-gnu/libQt5Core.so.5
#6  0x0000007fb8478e24 in ?? () from /usr/lib/aarch64-linux-gnu/libQt5DBus.so.5
#7  0x0000007fb891e180 in ?? () from /usr/lib/aarch64-linux-gnu/libQt5Core.so.5
#8  0x0000007fbfc4f648 in start_thread () from /usr/lib/aarch64-linux-gnu/libpthread.so.0
#9  0x0000007fb85b39dc in thread_start () from /usr/lib/aarch64-linux-gnu/libc.so.6

Thread 1 (Thread 0x7fb38b7020 (LWP 5)):
#0  0x0000000000000003 in ?? ()
#1  0x0000007fb21a0e68 in ?? ()
#2  0x000000555594ca50 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
A debugging session is active.

        Inferior 1 [process 5] will be killed.

Quit anyway? (y or n) [answered Y; input not from terminal]

with Maliit extension installed. Without extension, it will just hang not showing anything.

Padding didn't make any difference. As Flatpak works for Droidian/AOSP10/aarch64, it could be that their hybris is in a better shape for it. See https://github.com/droidian/libhybris and defined eglGetPlatformDisplay

If libhybris will get updated in SFOS 4.3, use that for testing. Looks like there are changes in eglGetPlatformDisplay in the latest libhybris

sailfishos-flatpak / main

Hybris linker not used on aarch64/AOSP10 based port #21