[Bug uprobes/12851] Wrong section group usage in <sys/sdt.h>

[hjl.tools at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12851

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2011-06-07 13:10:48 UTC ---
Please build and run "make check" GCC mainline on Fedora 15/x86.
I see

`_.stapsdt.base' referenced in section `.note.stapsdt' of
/usr/lib/../lib/libc.a(libc-lowlevellock.o): defined in discarded section
`.stapsdt.base[.stapsdt.base]' of /usr/lib/../lib/libc.a(bsd-_setjmp.o)^M
`_.stapsdt.base' referenced in section `.note.stapsdt' of
/usr/lib/../lib/libc.a(dl-lookup.o): defined in discarded section
`.stapsdt.base[.stapsdt.base]' of /usr/lib/../lib/libc.a(bsd-_setjmp.o)^M
`_.stapsdt.base' referenced in section `.note.stapsdt' of
/usr/lib/../lib/libc.a(setjmp.o): defined in discarded section
`.stapsdt.base[.stapsdt.base]' of /usr/lib/../lib/libc.a(bsd-_setjmp.o)^M
`_.stapsdt.base' referenced in section `.note.stapsdt' of
/usr/lib/../lib/libc.a(__longjmp.o): defined in discarded section
`.stapsdt.base[.stapsdt.base]' of /usr/lib/../lib/libc.a(bsd-_setjmp.o)^M
`_.stapsdt.base' referenced in section `.note.stapsdt' of
/usr/lib/../lib/libc.a(__longjmp.o): defined in discarded section
`.stapsdt.base[.stapsdt.base]' of /usr/lib/../lib/libc.a(bsd-_setjmp.o)^M
`_.stapsdt.base' referenced in section `.note.stapsdt' of
/usr/lib/../lib/libc.a(dl-runtime.o): defined in discarded section
`.stapsdt.base[.stapsdt.base]' of /usr/lib/../lib/libc.a(bsd-_setjmp.o)^M
`_.stapsdt.base' referenced in section `.note.stapsdt' of
/usr/lib/../lib/libc.a(dl-runtime.o): defined in discarded section
`.stapsdt.base[.stapsdt.base]' of /usr/lib/../lib/libc.a(bsd-_setjmp.o)^M


[hjl@gnu-33 tmp]$ readelf -Sg bsd-_setjmp.o
There are 14 section headers, starting at offset 0x15c:

Section Headers:
  [Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf
Al
  [ 0]                   NULL            00000000 000000 000000 00      0   0 
0
  [ 1] .group            GROUP           00000000 000034 000008 04     12   2 
4
  [ 2] .text             PROGBITS        00000000 000040 000037 00  AX  0   0
16
  [ 3] .data             PROGBITS        00000000 000078 000000 00  WA  0   0 
4
  [ 4] .bss              NOBITS          00000000 000078 000000 00  WA  0   0 
4
  [ 5] .note.stapsdt     NOTE            00000000 000078 000040 00      0   0 
4
  [ 6] .rel.note.stapsdt REL             00000000 000454 000010 08     12   5 
4
  [ 7] .stapsdt.base     PROGBITS        00000000 0000b8 000001 00  AG  0   0 
1
  [ 8] .note.GNU-stack   PROGBITS        00000000 0000b9 000000 00      0   0 
1
  [ 9] .eh_frame         PROGBITS        00000000 0000bc 00002c 00   A  0   0 
4
  [10] .rel.eh_frame     REL             00000000 000464 000008 08     12   9 
4
  [11] .shstrtab         STRTAB          00000000 0000e8 000071 00      0   0 
1
  [12] .symtab           SYMTAB          00000000 00038c 0000b0 10     13   9 
4
  [13] .strtab           STRTAB          00000000 00043c 000018 00      0   0 
1
Key to Flags:
  W (write), A (alloc), X (execute), M (merge), S (strings)
  I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
  O (extra OS processing required) o (OS specific), p (processor specific)

COMDAT group section [    1] `.group' [.stapsdt.base] contains 1 sections:
   [Index]    Name
   [    7]   .stapsdt.base
[hjl@gnu-33 tmp]$ 

.stapsdt.base and .note.stapsdt aren't in the same section group.

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