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Re: can't link big kernel


From: Marcus Brinkmann
Subject: Re: can't link big kernel
Date: Mon, 30 Jul 2001 14:00:54 +0200
User-agent: Mutt/1.3.18i

On Sun, Jul 29, 2001 at 07:12:35PM -0400, Roland McGrath wrote:
> I've never got this, though my linker version might be different (I have
> stock redhat7.1 right now).  Or rather, I have seen that error and know
> what it's about, but I wouldn't expect it for the kernel.
> 
> I wonder if you may have gotten some funny sections into the link,
> or perhaps somehow the linker thinks it needs to do dynamic linking setup.
> Try adding -t --verbose to the ld options and see if anything looks funny.
> Also try -static, which should not make a difference unless you have bogons
> in the link.

I have found an old build tree which I built with a version that worked and
this way I can reproduce it with object files that worked.

Adding static made no difference.  The search dir below is the linux search
dir, of course (but it shouldn't matter).  I aloso tried binutils
2.11.90.0.7-2, which produces exactly the same output (except fro version
and error message) but doesn't fail.

Thanks,
Marcus

$ ld -t --verbose -Ttext 1000000 -o kernel kernel.o clib-routines.o
GNU ld version 2.11.90.0.24 (with BFD 2.11.90.0.24)
  Supported emulations:
   elf_i386
   i386linux
using internal linker script:
==================================================
OUTPUT_FORMAT("elf32-i386", "elf32-i386",
              "elf32-i386")
OUTPUT_ARCH(i386)
ENTRY(_start)
SEARCH_DIR(/lib); SEARCH_DIR(/usr/lib); SEARCH_DIR(/usr/local/lib); 
SEARCH_DIR(/usr/i386-linux/lib);
/* Do we need any of these for elf?
   __DYNAMIC = 0;    */
SECTIONS
{
  /* Read-only sections, merged into text segment: */
  . = 0x08048000 + SIZEOF_HEADERS;
  .interp     : { *(.interp)    }
  .hash          : { *(.hash)           }
  .dynsym        : { *(.dynsym)         }
  .dynstr        : { *(.dynstr)         }
  .gnu.version   : { *(.gnu.version)    }
  .gnu.version_d   : { *(.gnu.version_d)        }
  .gnu.version_r   : { *(.gnu.version_r)        }
  .rel.init      : { *(.rel.init)       }
  .rela.init     : { *(.rela.init)      }
  .rel.text      :
    {
      *(.rel.text)
      *(.rel.text.*)
      *(.rel.gnu.linkonce.t.*)
    }
  .rela.text     :
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  .rel.fini      : { *(.rel.fini)       }
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  .rel.rodata    :
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      *(.rel.rodata)
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  .rela.rodata   :
    {
      *(.rela.rodata)
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  .rel.data      :
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    }
  .rel.ctors     : { *(.rel.ctors)      }
  .rela.ctors    : { *(.rela.ctors)     }
  .rel.dtors     : { *(.rel.dtors)      }
  .rela.dtors    : { *(.rela.dtors)     }
  .rel.got       : { *(.rel.got)                }
  .rela.got      : { *(.rela.got)               }
  .rel.sdata     :
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  .rel.bss       : 
    { 
      *(.rel.bss)
      *(.rel.bss.*)
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    }
  .rela.bss      : 
    { 
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      *(.rela.bss.*)
      *(.rela.gnu.linkonce.b.*)
    }
  .rel.plt       : { *(.rel.plt)                }
  .rela.plt      : { *(.rela.plt)               }
  .init          : 
  { 
    KEEP (*(.init))
  } =0x9090
  .plt      : { *(.plt) }
  .text      :
  {
    *(.text)
    *(.text.*)
    *(.stub)
    /* .gnu.warning sections are handled specially by elf32.em.  */
    *(.gnu.warning)
    *(.gnu.linkonce.t.*)
  } =0x9090
  .fini      :
  {
    KEEP (*(.fini))
  } =0x9090
  PROVIDE (__etext = .);
  PROVIDE (_etext = .);
  PROVIDE (etext = .);
  .rodata   : { *(.rodata) *(.rodata.*) *(.gnu.linkonce.r.*) }
  .rodata1   : { *(.rodata1) }
  .sdata2   : { *(.sdata2) *(.sdata2.*) *(.gnu.linkonce.s2.*) }
  .sbss2   : { *(.sbss2) *(.sbss2.*) *(.gnu.linkonce.sb2.*) }
  /* Adjust the address for the data segment.  We want to adjust up to
     the same address within the page on the next page up.  */
  . = ALIGN(0x1000) + (. & (0x1000 - 1));
  .data    :
  {
    *(.data)
    *(.data.*)
    *(.gnu.linkonce.d.*)
    SORT(CONSTRUCTORS)
  }
  .data1   : { *(.data1) }
  .eh_frame : { KEEP (*(.eh_frame)) }
  .gcc_except_table : { *(.gcc_except_table) }
  .ctors   : 
  {
    /* gcc uses crtbegin.o to find the start of
       the constructors, so we make sure it is
       first.  Because this is a wildcard, it
   ld: kernel: Not enough room for program headers (allocated 2, need 3)
ld: final link failed: Bad value
    doesn't matter if the user does not
       actually link against crtbegin.o; the
       linker won't look for a file to match a
       wildcard.  The wildcard also means that it
       doesn't matter which directory crtbegin.o
       is in.  */
    KEEP (*crtbegin.o(.ctors))
    /* We don't want to include the .ctor section from
       from the crtend.o file until after the sorted ctors.
       The .ctor section from the crtend file contains the
       end of ctors marker and it must be last */
    KEEP (*(EXCLUDE_FILE (*crtend.o ) .ctors))
    KEEP (*(SORT(.ctors.*)))
    KEEP (*(.ctors))
  }
   .dtors         :
  {
    KEEP (*crtbegin.o(.dtors))
    KEEP (*(EXCLUDE_FILE (*crtend.o ) .dtors))
    KEEP (*(SORT(.dtors.*)))
    KEEP (*(.dtors))
  }
  .got            : { *(.got.plt) *(.got) }
  .dynamic       : { *(.dynamic) }
  /* We want the small data sections together, so single-instruction offsets
     can access them all, and initialized data all before uninitialized, so
     we can shorten the on-disk segment size.  */
  .sdata     : 
  {
    *(.sdata) 
    *(.sdata.*)
    *(.gnu.linkonce.s.*)
  }
  _edata = .;
  PROVIDE (edata = .);
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  .sbss      :
  {
    PROVIDE (__sbss_start = .);
    PROVIDE (___sbss_start = .);
    *(.dynsbss)
    *(.sbss)
    *(.sbss.*)
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    *(.scommon)
    PROVIDE (__sbss_end = .);
    PROVIDE (___sbss_end = .);
  }
  .bss       :
  {
   *(.dynbss)
   *(.bss)
   *(.bss.*)
   *(.gnu.linkonce.b.*)
   *(COMMON)
   /* Align here to ensure that the .bss section occupies space up to
      _end.  Align after .bss to ensure correct alignment even if the
      .bss section disappears because there are no input sections.  */
   . = ALIGN(32 / 8);
  }
  . = ALIGN(32 / 8);
  _end = .;
  PROVIDE (end = .);
  /* Stabs debugging sections.  */
  .stab 0 : { *(.stab) }
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  .stab.indexstr 0 : { *(.stab.indexstr) }
  .comment 0 : { *(.comment) }
  /* DWARF debug sections.
     Symbols in the DWARF debugging sections are relative to the beginning
     of the section so we begin them at 0.  */
  /* DWARF 1 */
  .debug          0 : { *(.debug) }
  .line           0 : { *(.line) }
  /* GNU DWARF 1 extensions */
  .debug_srcinfo  0 : { *(.debug_srcinfo) }
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  /* DWARF 1.1 and DWARF 2 */
  .debug_aranges  0 : { *(.debug_aranges) }
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  /* DWARF 2 */
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  .debug_abbrev   0 : { *(.debug_abbrev) }
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  .debug_frame    0 : { *(.debug_frame) }
  .debug_str      0 : { *(.debug_str) }
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  .debug_macinfo  0 : { *(.debug_macinfo) }
  /* SGI/MIPS DWARF 2 extensions */
  .debug_weaknames 0 : { *(.debug_weaknames) }
  .debug_funcnames 0 : { *(.debug_funcnames) }
  .debug_typenames 0 : { *(.debug_typenames) }
  .debug_varnames  0 : { *(.debug_varnames) }
  /* These must appear regardless of  .  */
}


==================================================
ld: mode elf_i386
attempt to open kernel.o succeeded
kernel.o
attempt to open clib-routines.o succeeded
clib-routines.o


 

-- 
`Rhubarb is no Egyptian god.' Debian http://www.debian.org brinkmd@debian.org
Marcus Brinkmann              GNU    http://www.gnu.org    marcus@gnu.org
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de



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