Inconsistent page-size on loongarch64

[wojiushixiaobai]

I encountered a Segmentation Fault when running a Python binary built for loongarch64-unknown-linux-gnu. After investigation, the root cause is that the ELF segments were realigned/restructured using a page size (likely 4KB) that is incompatible with the target system's kernel page size (16KB or 64KB).

This is a similar issue to:

• Inconsistent page-size on arm64  pypa/manylinux#735
• aarch64 manylinux wheel and wrong pagesize numpy/numpy#16677

root@linux-loong64:/tmp/build# unzip cpython-3.10-loongarch64-unknown-linux-gnu-lto.zip 
Archive:  cpython-3.10-loongarch64-unknown-linux-gnu-lto.zip
 extracting: cpython-3.10.20-loongarch64-unknown-linux-gnu-lto-20260411T1217.tar.zst  
root@linux-loong64:/tmp/build# tar -xf cpython-3.10.20-loongarch64-unknown-linux-gnu-lto-20260411T1217.tar.zst 
root@linux-loong64:/tmp/build# cd python/install/bin/
root@linux-loong64:/tmp/build/python/install/bin# /opt/clang/bin/llvm-strip --strip-debug python -o python-strip
root@linux-loong64:/tmp/build/python/install/bin# ./python-strip -V
段错误                  ./python-strip -V
root@linux-loong64:/tmp/build/python/install/bin# /opt/clang/bin/readelf -l python python-strip 

File: python

Elf file type is DYN (Shared object file)
Entry point 0x151288
There are 13 program headers, starting at offset 64

Program Headers:
  Type           Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
  PHDR           0x000040 0x0000000000000040 0x0000000000000040 0x0002d8 0x0002d8 R   0x8
  LOAD           0x000000 0x0000000000000000 0x0000000000000000 0x149640 0x149640 R E 0x4000
  GNU_STACK      0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW  0x10
  LOAD           0x150000 0x0000000000150000 0x0000000000150000 0xf4b1b8 0xf4b1b8 R E 0x10000
  GNU_EH_FRAME   0xef617c 0x0000000000ef617c 0x0000000000ef617c 0x030b24 0x030b24 R   0x4
  NOTE           0x109b120 0x000000000109b120 0x000000000109b120 0x000020 0x000020 R   0x4
  NOTE           0x109b140 0x000000000109b140 0x000000000109b140 0x000078 0x000078 R   0x4
  LOAD           0x109b6e0 0x000000000109f6e0 0x000000000109f6e0 0x0ff368 0x10f5c8 RW  0x4000
  GNU_RELRO      0x109b6e0 0x000000000109f6e0 0x000000000109f6e0 0x09c920 0x09c920 R   0x1
  DYNAMIC        0x6196000 0x0000000006196000 0x0000000006196000 0x0001e0 0x0001e0 RW  0x8
  LOAD           0x6196000 0x0000000006196000 0x0000000006196000 0x00cee0 0x00cee0 RW  0x1000
  INTERP         0x61a2e90 0x00000000061a2e90 0x00000000061a2e90 0x000025 0x000025 R   0x1
      [Requesting program interpreter: /lib64/ld-linux-loongarch-lp64d.so.1]
  NOTE           0x61a2eb8 0x00000000061a2eb8 0x00000000061a2eb8 0x000024 0x000024 R   0x4

 Section to Segment mapping:
  Segment Sections...
   00     
   01     .dynsym .gnu.version .gnu.version_r .rela.dyn .rela.plt .plt 
   02     
   03     .text .rodata .eh_frame_hdr .eh_frame .note.ABI-tag .note.package 
   04     .eh_frame_hdr 
   05     .note.ABI-tag 
   06     .note.package 
   07     .init_array .fini_array .data.rel.ro .got .got.plt .data .PyRuntime .sdata .bss 
   08     .init_array .fini_array .data.rel.ro .got 
   09     .dynamic 
   10     .dynamic .dynstr .gnu.hash .interp .note.gnu.build-id 
   11     .interp 
   12     .note.gnu.build-id 
   None   .comment .debug_aranges .debug_info .debug_abbrev .debug_line .debug_str .debug_line_str .debug_loclists .debug_rnglists .symtab .strtab .shstrtab 

File: python-strip

Elf file type is DYN (Shared object file)
Entry point 0x151288
There are 13 program headers, starting at offset 64

Program Headers:
  Type           Offset   VirtAddr           PhysAddr           FileSiz  MemSiz   Flg Align
  PHDR           0x000040 0x0000000000000040 0x0000000000000040 0x0002d8 0x0002d8 R   0x8
  LOAD           0x000000 0x0000000000000000 0x0000000000000000 0x149640 0x149640 R E 0x4000
  GNU_STACK      0x000000 0x0000000000000000 0x0000000000000000 0x000000 0x000000 RW  0x10
  LOAD           0x150000 0x0000000000150000 0x0000000000150000 0xf4b1b8 0xf4b1b8 R E 0x10000
  GNU_EH_FRAME   0xef617c 0x0000000000ef617c 0x0000000000ef617c 0x030b24 0x030b24 R   0x4
  NOTE           0x109b120 0x000000000109b120 0x000000000109b120 0x000020 0x000020 R   0x4
  NOTE           0x109b140 0x000000000109b140 0x000000000109b140 0x000078 0x000078 R   0x4
  LOAD           0x109b6e0 0x000000000109f6e0 0x000000000109f6e0 0x0ff368 0x10f5c8 RW  0x4000
  GNU_RELRO      0x109b6e0 0x000000000109f6e0 0x000000000109f6e0 0x09c920 0x09c920 R   0x1
  DYNAMIC        0x119b000 0x0000000006196000 0x0000000006196000 0x0001e0 0x0001e0 RW  0x8
  LOAD           0x119b000 0x0000000006196000 0x0000000006196000 0x00cee0 0x00cee0 RW  0x1000
  INTERP         0x11a7e90 0x00000000061a2e90 0x00000000061a2e90 0x000025 0x000025 R   0x1
      [Requesting program interpreter: /lib64/ld-linux-loongarch-lp64d.so.1]
  NOTE           0x11a7eb8 0x00000000061a2eb8 0x00000000061a2eb8 0x000024 0x000024 R   0x4

 Section to Segment mapping:
  Segment Sections...
   00     
   01     .dynsym .gnu.version .gnu.version_r .rela.dyn .rela.plt .plt 
   02     
   03     .text .rodata .eh_frame_hdr .eh_frame .note.ABI-tag .note.package 
   04     .eh_frame_hdr 
   05     .note.ABI-tag 
   06     .note.package 
   07     .init_array .fini_array .data.rel.ro .got .got.plt .data .PyRuntime .sdata .bss 
   08     .init_array .fini_array .data.rel.ro .got 
   09     .dynamic 
   10     .dynamic .dynstr .gnu.hash .interp .note.gnu.build-id 
   11     .interp 
   12     .note.gnu.build-id 
   None   .comment .symtab .strtab .shstrtab

[jjhelmus]

I wonder if this is caused by the version of patchelf used (0.13.1), since loongarch support was not added until 0.14, NixOS/patchelf#333.