The missing .init_array/.fini_array is an inconsistency with upstream and may cause constructors not to be executed.
However, modern compilers (GCC/Clang) place generated constructors in .init_array (and .fini_array) by default, not .ctors. If the linker script does not explicitly handle these two sections, they will become orphan sections, which may be discarded or placed in the wrong location, causing global constructors not to be executed.
Add:

.init_array    :   
{
  PROVIDE_HIDDEN (__init_array_start = .); 
  KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*)))
  KEEP (*(.init_array))
  PROVIDE_HIDDEN (__init_array_end = .); 
}
.fini_array    :   
{
  PROVIDE_HIDDEN (__fini_array_start = .); 
  KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*)))
  KEEP (*(.fini_array))
  PROVIDE_HIDDEN (__fini_array_end = .); 
}

__global_pointer$ is defined here, but it is not referenced anywhere in the LoongArch startup code (locore.S) or under sys/loongarch/, so this definition is currently "dangling" and it is suggested to remove it.

much thanks!

right

should stay in alpha order, so just after i386

in alpha order, after i386

Yes, will fix that later

This list is kinda long, and maybe needs to be the list of things that cxgbe works on.