[Bug gold/22914] New: Gold doesn't support .note.gnu.property section (NT_GNU_PROPERTY_TYPE_0)

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=22914

            Bug ID: 22914
           Summary: Gold doesn't support .note.gnu.property section
                    (NT_GNU_PROPERTY_TYPE_0)
           Product: binutils
           Version: 2.31 (HEAD)
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: gold
          Assignee: ccoutant at gmail dot com
          Reporter: hjl.tools at gmail dot com
                CC: ian at airs dot com
  Target Milestone: ---

.note.gnu.property section and NT_GNU_PROPERTY_TYPE_0 are specified in
Linux Extensions to gABI:

https://github.com/hjl-tools/linux-abi/wiki/linux-abi-draft.pdf

address@hidden gold-2]$ cat x.S
#ifndef NT_GNU_PROPERTY_TYPE_0
# define NT_GNU_PROPERTY_TYPE_0 5
#endif

#ifndef GNU_PROPERTY_STACK_SIZE
# define GNU_PROPERTY_STACK_SIZE 1
#endif

#if __SIZEOF_PTRDIFF_T__  == 8
# define ALIGN 3
#elif __SIZEOF_PTRDIFF_T__  == 4
# define ALIGN 2
#endif

        .section ".note.gnu.property", "a"
        .p2align ALIGN

        .long 1f - 0f           /* name length */
        .long 5f - 2f           /* data length */
        .long NT_GNU_PROPERTY_TYPE_0    /* note type */
0:      .asciz "GNU"            /* vendor name */
1:
        .p2align ALIGN
2:      .long GNU_PROPERTY_STACK_SIZE   /* pr_type.  */
        .long 4f - 3f   /* pr_datasz.  */
3:
        .dc.a 0x800     /* Stack size.  */
4:
        .p2align ALIGN
5:
address@hidden gold-2]$ cat y.S
#ifndef NT_GNU_PROPERTY_TYPE_0
# define NT_GNU_PROPERTY_TYPE_0 5
#endif

#ifndef GNU_PROPERTY_NO_COPY_ON_PROTECTED
# define GNU_PROPERTY_NO_COPY_ON_PROTECTED 2
#endif

#if __SIZEOF_PTRDIFF_T__  == 8
# define ALIGN 3
#elif __SIZEOF_PTRDIFF_T__  == 4
# define ALIGN 2
#endif

        .section ".note.gnu.property", "a"
        .p2align ALIGN
        .long 1f - 0f           /* name length */
        .long 3f - 2f           /* data length */
        .long NT_GNU_PROPERTY_TYPE_0    /* note type */
0:      .asciz "GNU"            /* vendor name */
1:
        .p2align ALIGN
2:      .long GNU_PROPERTY_NO_COPY_ON_PROTECTED /* pr_type.  */
        .long 0 /* pr_datasz.  */
3:
        .p2align ALIGN
address@hidden gold-2]$ cat z.S
#ifndef NT_GNU_PROPERTY_TYPE_0
# define NT_GNU_PROPERTY_TYPE_0 5
#endif

#ifndef GNU_PROPERTY_STACK_SIZE
# define GNU_PROPERTY_STACK_SIZE 1
#endif

#ifndef GNU_PROPERTY_NO_COPY_ON_PROTECTED
# define GNU_PROPERTY_NO_COPY_ON_PROTECTED 2
#endif

#if __SIZEOF_PTRDIFF_T__  == 8
# define ALIGN 3
#elif __SIZEOF_PTRDIFF_T__  == 4
# define ALIGN 2
#endif

        .section ".note.gnu.property", "a"
        .p2align ALIGN
        .long 1f - 0f           /* name length */
        .long 5f - 2f           /* data length */
        .long NT_GNU_PROPERTY_TYPE_0    /* note type */
0:      .asciz "GNU"            /* vendor name */
1:
        .p2align ALIGN
2:      .long GNU_PROPERTY_STACK_SIZE   /* pr_type.  */
        .long 4f - 3f   /* pr_datasz.  */
3:
        .dc.a 0x111100  /* Stack size.  */
4:
        .p2align ALIGN
        .long GNU_PROPERTY_NO_COPY_ON_PROTECTED /* pr_type.  */
        .long 0 /* pr_datasz.  */
        .p2align ALIGN
5:
address@hidden gold-2]$ cat bar.c
void
_start (void)
{
}
address@hidden gold-2]$ make
gcc -B./  -c -o x.o x.S
gcc -B./  -c -o y.o y.S
gcc -B./  -c -o z.o z.S
gcc -B./  -c -o bar.o bar.c
./ld  -o x x.o y.o z.o bar.o
ld  -o y x.o y.o z.o bar.o
readelf -n x y

File: x

Displaying notes found in: .note.gnu.property
  Owner                 Data size       Description
  GNU                  0x00000010       NT_GNU_PROPERTY_TYPE_0
      Properties: stack size: 0x800
  GNU                  0x00000008       NT_GNU_PROPERTY_TYPE_0
      Properties: no copy on protected 
  GNU                  0x00000018       NT_GNU_PROPERTY_TYPE_0
      Properties: stack size: 0x111100
        no copy on protected 

Displaying notes found in: .note.gnu.gold-version
  Owner                 Data size       Description
  GNU                  0x00000009       NT_GNU_GOLD_VERSION (gold version)
    Version: gold 1.15

File: y

Displaying notes found in: .note.gnu.property
  Owner                 Data size       Description
  GNU                  0x00000018       NT_GNU_PROPERTY_TYPE_0
      Properties: stack size: 0x111100
        no copy on protected 
address@hidden gold-2]$

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