[Bug ld/29411] New: ld warning on SPARC: LOAD segment with RWX permissions

[ro at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=29411

            Bug ID: 29411
           Summary: ld warning on SPARC: LOAD segment with RWX permissions
           Product: binutils
           Version: 2.39
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: ro at gcc dot gnu.org
  Target Milestone: ---
              Host: sparcv9-sun-solaris2.11, sparc64-sun-linux-gnu
            Target: sparcv9-sun-solaris2.11, sparc64-sun-linux-gnu
             Build: sparcv9-sun-solaris2.11, sparc64-sun-linux-gnu

When trying to build LLVM main on Debian/sparc64, I saw lots of warnings:

/usr/bin/ld: warning: bin/llvm-readobj has a LOAD segment with RWX permissions

/usr/bin/ld is

GNU ld (GNU Binutils for Debian) 2.38.50.20220707

However, the same issue exists on Solaris 11/SPARC.

AFAICS, this happens as follows (taking the Solaris example):

$ readelf -l /lib/libc.so.1
[...]
Program Headers:
  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  PT_SUNWCAP     0x0000f4 0x000000f4 0x00000000 0x001a0 0x001a0 R   0x4
  LOAD           0x000000 0x00000000 0x00000000 0x213913 0x213913 R E 0x10000
  LOAD           0x214000 0x00224000 0x00000000 0x0b9b8 0x11124 RWE 0x10000
[...]
 Section to Segment mapping:
  Segment Sections...
   00     .SUNW_cap 
   01     .SUNW_cap .SUNW_capinfo .SUNW_capchain .dynamic .SUNW_syminfo .hash
.SUNW_ldynsym .dynsym .dynstr .SUNW_version .SUNW_versym .SUNW_dynsymsort
.SUNW_dyntlssort .SUNW_dynsymnsort .SUNW_phname .SUNW_reloc .rela.plt .rodata
.rodata1 .text .init .fini .SUNW_dof 
   02     .got .plt .data .picdata .bss 

Looking at the sections in segment 02, I find only one that is RWE:

$ readelf -S /lib/libc.so.1
[...]Section Headers:
  [Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf
Al
[...]
  [25] .plt              PROGBITS        00224ca0 214ca0 0002a4 0c WAX  0   0 
4

However, this is exactly as prescribed by the respective psABIs:

* 32-bit SPARC:

  SYSTEM V APPLICATION BINARY INTERFACE SPARC Processor Supplement, Third
Edition
  p. 5-5 - 5-8, Procedure Linkage Table

* 64-bit SPARC V9:

  SPARC COMPLIANCE DEFINITION 2.4.1
  p. 5P-4 - 5P-8, Procedure Linkage Table

I have no idea what to do here, but warning about ABI-compliant binaries seems
strange.

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