Problem with DWARF2 debug info for DJGPP

pavenis@lanet.lv pavenis@lanet.lv
Fri Aug 9 02:57:00 GMT 2002


I'm getting error message about wrong DWARF2 abbrev when attemting to link
program which contains reference to unresolved symbol
(targets i[3456]86-pc-msdosdjgpp, binutils version 2.13).
See backtrace from GDB below for details. Often I'm also getting a message
that abbrev is out of range. This always happens when there is an unresolved
reference, so we already have another problem.

One of the possible workarounds here could be removing call to
_bfd_dwarf2_find_nearest_line() in coff_find_nearest_line() (file coffgen.c),
but perhaps it would be best to fix it without removing call.

Andris

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This GDB was configured as "i386-pc-msdosdjgpp".
(gdb) b fprintf
Breakpoint 1 at 0x60eb5
(gdb) r
Starting program: d:/Devel/binutils/gnu/binutl-2.13/build.djg/ld/ld-new.exe -o
f
oo.exe c:/djgpp/lib/crt0.o -Lc:/djgpp/lib/gcc-lib/djgpp/3.2 -Lc:/djgpp/bin -
Lc:/
djgpp/lib -Lc:/djgpp/lib/gcc-lib/djgpp/3.2/../../.. foo.o -lgcc -lc -lgcc -
Tdjgp
p-x.djl

Breakpoint 1, 0x00060eb5 in fprintf ()
#0  0x00060eb5 in fprintf ()
#1  0x00022abf in _bfd_default_error_handler (
    s=0x4efe0 "Dwarf Error: Could not find abbrev number %u.")
    at ../../bfd/bfd.c:419
#2  0x0004f46b in parse_comp_unit (abfd=0xffedff78, stash=0xffeeaac4,
    unit_length=355, offset_size=4) at ../../bfd/dwarf2.c:1527
#3  0x0004f92f in _bfd_dwarf2_find_nearest_line (abfd=0xffedff78,
    section=0xfe368, symbols=0x5a6588, offset=38, filename_ptr=0xfd454,
    functionname_ptr=0xfd458, linenumber_ptr=0xfd45c, addr_size=4, pinfo=0x4)
    at ../../bfd/dwarf2.c:1912
#4  0x0004168d in coff_find_nearest_line (abfd=0xffedff78, section=0xffee1024,
    symbols=0x5a6588, offset=38, filename_ptr=0xfd454,
    functionname_ptr=0xfd458, line_ptr=0xfd45c) at ../../bfd/coffgen.c:2233
#5  0x0001f40a in vfinfo (fp=0x75c00,
    fmt=0x1bcf2 ": undefined reference to `%T'\n",
    arg=0xfd590 "˳ò    \177    ") at ../../ld/ldmisc.c:284
#6  0x0001fb18 in einfo (fmt=0x1bcf0 "%C: undefined reference to `%T'\n")
    at ../../ld/ldmisc.c:454
#7  0x0001bf04 in undefined_symbol (info=0x7b758, name=0xffecfcb8 "_foo",
    abfd=0xffedff78, section=0xffee1024, address=38, fatal=true)
    at ../../ld/ldmain.c:1260
#8  0x0004627d in _bfd_coff_generic_relocate_section (output_bfd=0xffec96c0,
    info=0x7b758, input_bfd=0xffedff78, input_section=0xffee1024,
    contents=0x5aebd0 "Hello", relocs=0x5b0898, syms=0x5a5aa8,
    sections=0x5a6248) at ../../bfd/cofflink.c:2985
#9  0x00044246 in _bfd_coff_link_input_bfd (finfo=0xfd8b0,
    input_bfd=0xffedff78) at ../../bfd/cofflink.c:2362
#10 0x0004338e in _bfd_coff_final_link (abfd=0xffec96c0, info=0x7b758)
    at ../../bfd/cofflink.c:923
#11 0x0001cb90 in ldwrite () at ../../ld/ldwrite.c:540
#12 0x0001a43d in main (argc=0, argv=0x0) at ../../ld/ldmain.c:415
#13 0x000607e7 in __crt1_startup ()





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