[Bug ld/31300] New: ld: warning: x.so has a LOAD segment with RWX permissions

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31300

            Bug ID: 31300
           Summary: ld: warning: x.so has a LOAD segment with RWX
                    permissions
           Product: binutils
           Version: 2.43 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---
            Target: x86-64

Created attachment 15336
  --> https://sourceware.org/bugzilla/attachment.cgi?id=15336&action=edit
A testcase

[hjl@gnu-cfl-3 pr113617]$ gcc -c pr113617.s
[hjl@gnu-cfl-3 pr113617]$ ld -shared -o x.so pr113617.o
ld: warning: x.so has a LOAD segment with RWX permissions
[hjl@gnu-cfl-3 pr113617]$ readelf -SlW x.so 
There are 19 section headers, starting at offset 0x39f8:

Section Headers:
  [Nr] Name              Type            Address          Off    Size   ES Flg
Lk Inf Al
  [ 0]                   NULL            0000000000000000 000000 000000 00     
0   0  0
  [ 1] .hash             HASH            0000000000000238 000238 00002c 04   A 
3   0  8
  [ 2] .gnu.hash         GNU_HASH        0000000000000268 000268 00001c 00   A 
3   0  8
  [ 3] .dynsym           DYNSYM          0000000000000288 000288 000090 18   A 
4   1  8
  [ 4] .dynstr           STRTAB          0000000000000318 000318 000124 00   A 
0   0  1
  [ 5] .rela.dyn         RELA            0000000000000440 000440 000018 18   A 
3   0  8
  [ 6] .rela.plt         RELA            0000000000000458 000458 000078 18  AI 
3  13  8
  [ 7] .plt              PROGBITS        0000000000001000 001000 000060 10  AX 
0   0 16
  [ 8] .text             PROGBITS        0000000000001060 001060 0001df 00  AX 
0   0 16
  [ 9] .note.gnu.property NOTE            0000000000002000 002000 000030 00   A
 0   0  8
  [10] .eh_frame         PROGBITS        0000000000002030 002030 000154 00   A 
0   0  8
  [11] .data.rel.ro      PROGBITS        0000000000003e80 002e80 000008 00 WAX 
0   0  8
  [12] .dynamic          DYNAMIC         0000000000003e88 002e88 000160 10  WA 
4   0  8
  [13] .got.plt          PROGBITS        0000000000003fe8 002fe8 000040 08  WA 
0   0  8
  [14] .bss              NOBITS          0000000000004028 003028 000010 00  WA 
0   0  8
  [15] .comment          PROGBITS        0000000000000000 003028 00002a 01  MS 
0   0  1
  [16] .symtab           SYMTAB          0000000000000000 003058 000240 18    
17  19  8
  [17] .strtab           STRTAB          0000000000000000 003298 0006c4 00     
0   0  1
  [18] .shstrtab         STRTAB          0000000000000000 00395c 000099 00     
0   0  1
Key to Flags:
  W (write), A (alloc), X (execute), M (merge), S (strings), I (info),
  L (link order), O (extra OS processing required), G (group), T (TLS),
  C (compressed), x (unknown), o (OS specific), E (exclude),
  D (mbind), l (large), p (processor specific)

Elf file type is DYN (Shared object file)
Entry point 0x0
There are 9 program headers, starting at offset 64

Program Headers:
  Type           Offset   VirtAddr           PhysAddr           FileSiz  MemSiz
  Flg Align
  LOAD           0x000000 0x0000000000000000 0x0000000000000000 0x0004d0
0x0004d0 R   0x1000
  LOAD           0x001000 0x0000000000001000 0x0000000000001000 0x00023f
0x00023f R E 0x1000
  LOAD           0x002000 0x0000000000002000 0x0000000000002000 0x000184
0x000184 R   0x1000
  LOAD           0x002e80 0x0000000000003e80 0x0000000000003e80 0x0001a8
0x0001b8 RWE 0x1000
  DYNAMIC        0x002e88 0x0000000000003e88 0x0000000000003e88 0x000160
0x000160 RW  0x8
  NOTE           0x002000 0x0000000000002000 0x0000000000002000 0x000030
0x000030 R   0x8
  GNU_PROPERTY   0x002000 0x0000000000002000 0x0000000000002000 0x000030
0x000030 R   0x8
  GNU_STACK      0x000000 0x0000000000000000 0x0000000000000000 0x000000
0x000000 RW  0x10
  GNU_RELRO      0x002e80 0x0000000000003e80 0x0000000000003e80 0x000180
0x000180 R   0x1

 Section to Segment mapping:
  Segment Sections...
   00     .hash .gnu.hash .dynsym .dynstr .rela.dyn .rela.plt 
   01     .plt .text 
   02     .note.gnu.property .eh_frame 
   03     .data.rel.ro .dynamic .got.plt .bss 
   04     .dynamic 
   05     .note.gnu.property 
   06     .note.gnu.property 
   07     
   08     .data.rel.ro .dynamic 
[hjl@gnu-cfl-3 pr113617]$

LOAD           0x002e80 0x0000000000003e80 0x0000000000003e80 0x0001a8 0x0001b8
RWE 0x1000

is wrong since

  03     .data.rel.ro .dynamic .got.plt .bss

doesn't need the X bit.

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