[Bug ld/20528] New: ld -r doesn't handle SHF_EXCLUDE section properly

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20528

            Bug ID: 20528
           Summary: ld -r doesn't handle SHF_EXCLUDE section properly
           Product: binutils
           Version: 2.28 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
  Target Milestone: ---

address@hidden exclude-1]$ cat x.s
        .text
        .section        .text.startup,"ax",%progbits
        .globl  main
        .type   main, %function
main:
        .byte 0
address@hidden exclude-1]$ cat y.s
        .text
        .section        .text.startup,"axe",%progbits
        .globl  main1
        .type   main1, %function
main1:
        .byte 0
address@hidden exclude-1]$ make LD=ld y
gcc -c  -o y.o y.s
gcc -c  -o x.o x.s
ld -r -o y y.o x.o
address@hidden exclude-1]$ readelf -SW y
There are 8 section headers, starting at offset 0x138:

Section Headers:
  [Nr] Name              Type            Address          Off    Size   ES Flg
Lk Inf Al
  [ 0]                   NULL            0000000000000000 000000 000000 00     
0   0  0
  [ 1] .text             PROGBITS        0000000000000000 000040 000000 00  AX 
0   0  1
  [ 2] .text.startup     PROGBITS        0000000000000000 000040 000002 00 AXE 
0   0  1
  [ 3] .data             PROGBITS        0000000000000000 000042 000000 00  WA 
0   0  1
  [ 4] .bss              NOBITS          0000000000000000 000042 000000 00  WA 
0   0  1
  [ 5] .shstrtab         STRTAB          0000000000000000 0000fc 00003a 00     
0   0  1
  [ 6] .symtab           SYMTAB          0000000000000000 000048 0000a8 18     
7   5  8
  [ 7] .strtab           STRTAB          0000000000000000 0000f0 00000c 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),
  l (large), p (processor specific)
address@hidden exclude-1]$ 

2 different .text.startup sections are merged into one.

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