[LLD] lld does not add the entry size for the `.plt` and `.plt.sec` sections.

[da-viper]

// main.c
#include <stdio.h>

int main() {
    puts("hello\n");
    printf("hello\n");
    return 0;
}

lld output of the .plt section

from llvm-readobj --sections main
lld output compiled with clang main.c -fuse-ld=lld -o main

  Section {
    Index: 17
    Name: .plt (161)
    Type: SHT_PROGBITS (0x1)
    Flags [ (0x6)
      SHF_ALLOC (0x2)
      SHF_EXECINSTR (0x4)
    ]
    Address: 0x17E0
    Offset: 0x7E0
    Size: 64
    Link: 0
    Info: 0
    AddressAlignment: 16
    EntrySize: 0
  }

bfd output compiled with clang main.c -fuse-ld=bfd -o main

  Section {
    Index: 10
    Name: .plt (104)
    Type: SHT_PROGBITS (0x1)
    Flags [ (0x6)
      SHF_ALLOC (0x2)
      SHF_EXECINSTR (0x4)
    ]
    Address: 0x1020
    Offset: 0x1020
    Size: 48
    Link: 0
    Info: 0
    AddressAlignment: 16
    EntrySize: 16
  }

[MaskRay]

  Section {
    Index: 10
    Name: plt (104)

Did you modify GNU ld so that it produces plt instead of .plt? The description doesn't mention .plt.sec.

Some sections hold a table of fixed-size entries, such as a symbol table. For such a section, this member gives the size in bytes of each entry. The member contains 0 if the section does not hold a table of fixed-size entries.

It would be odd to set sh_entsize to a non-zero value for a code section.

[da-viper]

Did you modify GNU ld so that it produces plt instead of .plt?

It was a mistake when copying the output.

The description doesn't mention .plt.sec.

the .plt.sec only gets generated when the -fcf-proctection flag is provided.
Here is the output for .plt and .plt.sec section when compiled with

clang main.c -fuse-ld=bfd -o main -fcf-protection=full

  Section {
    Index: 10
    Name: .plt (104)
    Type: SHT_PROGBITS (0x1)
    Flags [ (0x6)
      SHF_ALLOC (0x2)
      SHF_EXECINSTR (0x4)
    ]
    Address: 0x1020
    Offset: 0x1020
    Size: 48
    Link: 0
    Info: 0
    AddressAlignment: 16
    EntrySize: 16
  }
  Section {
    Index: 11
    Name: .plt.got (115)
    Type: SHT_PROGBITS (0x1)
    Flags [ (0x6)
      SHF_ALLOC (0x2)
      SHF_EXECINSTR (0x4)
    ]
    Address: 0x1050
    Offset: 0x1050
    Size: 16
    Link: 0
    Info: 0
    AddressAlignment: 16
    EntrySize: 16
  }
  Section {
    Index: 12
    Name: .plt.sec (124)
    Type: SHT_PROGBITS (0x1)
    Flags [ (0x6)
      SHF_ALLOC (0x2)
      SHF_EXECINSTR (0x4)
    ]
    Address: 0x1060
    Offset: 0x1060
    Size: 32
    Link: 0
    Info: 0
    AddressAlignment: 16
    EntrySize: 16
  }

clang main.c -fuse-ld=lld -o main -fcf-protection=full

  Section {
    Index: 19
    Name: .plt (188)
    Type: SHT_PROGBITS (0x1)
    Flags [ (0x6)
      SHF_ALLOC (0x2)
      SHF_EXECINSTR (0x4)
    ]
    Address: 0x1880
    Offset: 0x880
    Size: 64
    Link: 0
    Info: 0
    AddressAlignment: 16
    EntrySize: 0
  }
  Section {
    Index: 20
    Name: .plt.sec (193)
    Type: SHT_PROGBITS (0x1)
    Flags [ (0x6)
      SHF_ALLOC (0x2)
      SHF_EXECINSTR (0x4)
    ]
    Address: 0x18C0
    Offset: 0x8C0
    Size: 48
    Link: 0
    Info: 0
    AddressAlignment: 16
    EntrySize: 0
  }
  Section {
    Index: 28
    Name: .got.plt (277)
    Type: SHT_PROGBITS (0x1)
    Flags [ (0x3)
      SHF_ALLOC (0x2)
      SHF_WRITE (0x1)
    ]
    Address: 0x3AD8
    Offset: 0xAD8
    Size: 48
    Link: 0
    Info: 0
    AddressAlignment: 8
    EntrySize: 0
  }