367 lines
9.1 KiB
HTML
367 lines
9.1 KiB
HTML
<HTML
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><HEAD
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><TITLE
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>Internal Linker Script</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Linux i386 Boot Code HOWTO"
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HREF="index.html"><LINK
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REL="PREVIOUS"
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TITLE="Kernel Build Example"
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HREF="kbuild.html"><LINK
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REL="NEXT"
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TITLE="GRUB and LILO"
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HREF="bootloader.html"></HEAD
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><BODY
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CLASS="sect1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Linux i386 Boot Code HOWTO</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="kbuild.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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></TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="bootloader.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="sect1"
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><H1
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CLASS="sect1"
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><A
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NAME="internel_lds"
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></A
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>B. Internal Linker Script</H1
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><P
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> Without -T (--script=) option specified, <B
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CLASS="command"
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>ld</B
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> will
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use this builtin script to link targets:
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<TABLE
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BORDER="0"
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BGCOLOR="#E0E0E0"
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WIDTH="100%"
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><TR
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><TD
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><FONT
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COLOR="#000000"
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><PRE
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CLASS="screen"
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><B
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CLASS="command"
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>[root@localhost linux]# ld --verbose</B
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>
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GNU ld version 2.13.90.0.18 20030206
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Supported emulations:
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elf_i386
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i386linux
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using internal linker script:
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==================================================
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/* Script for -z combreloc: combine and sort reloc sections */
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OUTPUT_FORMAT("elf32-i386", "elf32-i386",
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"elf32-i386")
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OUTPUT_ARCH(i386)
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ENTRY(_start)
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SEARCH_DIR("/usr/i386-redhat-linux/lib"); SEARCH_DIR("/usr/lib"); SEARCH_DIR("/u
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sr/local/lib"); SEARCH_DIR("/lib");
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/* Do we need any of these for elf?
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__DYNAMIC = 0; */
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SECTIONS
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KEEP (*(.init))
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*(.gnu.warning)
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.fini :
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{
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KEEP (*(.fini))
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} =0x90909090
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PROVIDE (__etext = .);
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PROVIDE (_etext = .);
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PROVIDE (etext = .);
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.rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
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.rodata1 : { *(.rodata1) }
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.eh_frame : ONLY_IF_RO { KEEP (*(.eh_frame)) }
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.gcc_except_table : ONLY_IF_RO { *(.gcc_except_table) }
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/* Adjust the address for the data segment. We want to adjust up to
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the same address within the page on the next page up. */
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. = ALIGN (0x1000) - ((0x1000 - .) & (0x1000 - 1)); . = DATA_SEGMENT_ALIGN (0x
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/* For backward-compatibility with tools that don't support the
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*_array_* sections below, our glibc's crt files contain weak
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definitions of symbols that they reference. We don't want to use
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them, though, unless they're strictly necessary, because they'd
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bring us empty sections, unlike PROVIDE below, so we drop the
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sections from the crt files here. */
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/DISCARD/ : {
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*/crti.o(.init_array .fini_array .preinit_array)
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*/crtn.o(.init_array .fini_array .preinit_array)
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}
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/* Ensure the __preinit_array_start label is properly aligned. We
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could instead move the label definition inside the section, but
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the linker would then create the section even if it turns out to
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be empty, which isn't pretty. */
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. = ALIGN(32 / 8);
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PROVIDE (__preinit_array_start = .);
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.preinit_array : { *(.preinit_array) }
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PROVIDE (__preinit_array_end = .);
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PROVIDE (__init_array_start = .);
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.init_array : { *(.init_array) }
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PROVIDE (__init_array_end = .);
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PROVIDE (__fini_array_start = .);
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.fini_array : { *(.fini_array) }
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PROVIDE (__fini_array_end = .);
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.data :
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{
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*(.data .data.* .gnu.linkonce.d.*)
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SORT(CONSTRUCTORS)
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}
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.gcc_except_table : ONLY_IF_RW { *(.gcc_except_table) }
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.dynamic : { *(.dynamic) }
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.ctors :
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{
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/* gcc uses crtbegin.o to find the start of
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the constructors, so we make sure it is
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first. Because this is a wildcard, it
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doesn't matter if the user does not
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actually link against crtbegin.o; the
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linker won't look for a file to match a
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wildcard. The wildcard also means that it
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doesn't matter which directory crtbegin.o
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is in. */
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KEEP (*crtbegin.o(.ctors))
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/* We don't want to include the .ctor section from
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from the crtend.o file until after the sorted ctors.
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The .ctor section from the crtend file contains the
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end of ctors marker and it must be last */
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KEEP (*(EXCLUDE_FILE (*crtend.o ) .ctors))
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KEEP (*(SORT(.ctors.*)))
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KEEP (*(.ctors))
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}
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.dtors :
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{
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KEEP (*crtbegin.o(.dtors))
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KEEP (*(EXCLUDE_FILE (*crtend.o ) .dtors))
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KEEP (*(SORT(.dtors.*)))
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KEEP (*(.dtors))
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{
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*(.dynbss)
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*(.bss .bss.* .gnu.linkonce.b.*)
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*(COMMON)
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/* Align here to ensure that the .bss section occupies space up to
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_end. Align after .bss to ensure correct alignment even if the
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.bss section disappears because there are no input sections. */
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. = ALIGN(32 / 8);
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}
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. = ALIGN(32 / 8);
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_end = .;
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PROVIDE (end = .);
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. = DATA_SEGMENT_END (.);
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/* Stabs debugging sections. */
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/* DWARF debug sections.
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Symbols in the DWARF debugging sections are relative to the beginning
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of the section so we begin them at 0. */
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/* DWARF 1 */
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/* DWARF 2 */
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/* SGI/MIPS DWARF 2 extensions */
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.debug_varnames 0 : { *(.debug_varnames) }
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}
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==================================================
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<B
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CLASS="command"
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>[root@localhost linux]# </B
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></PRE
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></FONT
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></TD
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></TR
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></TABLE
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>
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</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
|
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><A
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HREF="kbuild.html"
|
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
|
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ALIGN="center"
|
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VALIGN="top"
|
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><A
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HREF="index.html"
|
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ACCESSKEY="H"
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>Home</A
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></TD
|
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><TD
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WIDTH="33%"
|
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="bootloader.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Kernel Build Example</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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> </TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>GRUB and LILO</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |