blob: c9a91c02be3ca41416ee5056526dd7b7b7b8d4cf [file] [log] [blame]
/* -*- ld-script -*- */
/*
* Linker script for i386 images
*
*/
SECTIONS {
/* Each section starts at a virtual address of zero.
*
* We guarantee alignment of virtual addresses to any alignment
* specified by the constituent object files (e.g. via
* __attribute__((aligned(x)))). Load addresses are guaranteed
* only up to _max_align. Provided that all loader and relocation
* code honours _max_align, this means that physical addresses are
* also guaranteed up to _max_align.
*
* Note that when using -DKEEP_IT_REAL, the UNDI segments are only
* guaranteed to be loaded on a paragraph boundary (i.e. 16-byte
* alignment). Using _max_align>16 will therefore not guarantee
* >16-byte alignment of physical addresses when -DKEEP_IT_REAL is
* used (though virtual addresses will still be fully aligned).
*
*/
PROVIDE ( _max_align = 16 );
/*
* Values used in page table calculations
*
* On older versions of ld (without the SANE_EXPR feature),
* numeric literals within a section description tend to be
* interpreted as section-relative symbols.
*
*/
_page_size = 4096;
_page_size_1 = ( _page_size - 1 );
_pte_size = 8;
_pte_count = ( _page_size / _pte_size );
_pte_count_1 = ( _pte_count - 1 );
/*
* Allow decompressor to require a minimum amount of temporary stack
* space.
*
*/
PROVIDE ( _min_decompress_stack = 0 );
/*
* The prefix
*
*/
.prefix 0x0 : AT ( _prefix_lma ) {
_prefix = .;
*(.prefix)
*(SORT(.pci_devlist.*))
*(.prefix.*)
_mprefix = .;
} .bss.prefix (NOLOAD) : AT ( _end_lma ) {
_eprefix = .;
}
_prefix_filesz = ABSOLUTE ( _mprefix ) - ABSOLUTE ( _prefix );
_prefix_memsz = ABSOLUTE ( _eprefix ) - ABSOLUTE ( _prefix );
/*
* The 16-bit (real-mode) code section
*
*/
.text16.early 0x0 : AT ( _text16_early_lma ) {
_text16 = .;
KEEP(*(.text16.null))
KEEP(*(.text16.null.*))
. += 1; /* Prevent NULL being valid */
*(.text16.early)
*(.text16.early.*)
_etext16_early = .;
} .text16.late ALIGN ( _max_align ) : AT ( _text16_late_lma ) {
_text16_late = .;
*(.text16)
*(.text16.*)
_mtext16 = .;
} .bss.text16 (NOLOAD) : AT ( _end_lma ) {
_etext16 = .;
}
_text16_early_filesz = ABSOLUTE ( _etext16_early ) - ABSOLUTE ( _text16 );
_text16_early_memsz = ABSOLUTE ( _etext16_early ) - ABSOLUTE ( _text16 );
_text16_late_filesz = ABSOLUTE ( _mtext16 ) - ABSOLUTE ( _text16_late );
_text16_late_memsz = ABSOLUTE ( _etext16 ) - ABSOLUTE ( _text16_late );
_text16_memsz = ABSOLUTE ( _etext16 ) - ABSOLUTE ( _text16 );
/*
* The 16-bit (real-mode) data section
*
*/
.data16 0x0 : AT ( _data16_lma ) {
_data16 = .;
. += 1; /* Prevent NULL being valid */
*(.rodata16)
*(.rodata16.*)
*(.data16)
*(.data16.*)
_mdata16 = .;
} .bss.data16 (NOLOAD) : AT ( _end_lma ) {
*(.bss16)
*(.bss16.*)
*(.stack16)
*(.stack16.*)
. = MAX ( ., _mdata16 + _min_decompress_stack );
_edata16 = .;
}
_data16_filesz = ABSOLUTE ( _mdata16 ) - ABSOLUTE ( _data16 );
_data16_memsz = ABSOLUTE ( _edata16 ) - ABSOLUTE ( _data16 );
/*
* The 32-bit sections
*
*/
.textdata 0x0 : AT ( _textdata_lma ) {
_textdata = .;
KEEP(*(.text.null_trap))
KEEP(*(.text.null_trap.*))
. += 1; /* Prevent NULL being valid */
*(.text)
*(.text.*)
*(.rodata)
*(.rodata.*)
*(.data)
*(.data.*)
KEEP(*(SORT(.tbl.*))) /* Various tables. See include/tables.h */
KEEP(*(.provided))
KEEP(*(.provided.*))
_mtextdata = .;
} .bss.textdata (NOLOAD) : AT ( _end_lma ) {
*(.bss)
*(.bss.*)
*(COMMON)
*(.stack)
*(.stack.*)
_pages = .;
*(.pages)
*(.pages.*)
_use_page_tables = ABSOLUTE ( . ) - ABSOLUTE ( _pages );
_textdata_paged_len =
ABSOLUTE ( ABSOLUTE ( . ) - ABSOLUTE ( _textdata ) );
_textdata_ptes =
ABSOLUTE ( ( _textdata_paged_len + _page_size_1 ) / _page_size );
_textdata_pdes =
ABSOLUTE ( ( _textdata_ptes + _pte_count_1 ) / _pte_count );
. += ( _use_page_tables ? ( _textdata_pdes * _page_size ) : 0 );
_epages = .;
_etextdata = .;
}
_textdata_filesz = ABSOLUTE ( _mtextdata ) - ABSOLUTE ( _textdata );
_textdata_memsz = ABSOLUTE ( _etextdata ) - ABSOLUTE ( _textdata );
/*
* Payload prefix
*
* If present, this will be placed between .text16.early and .text16.late.
*
*/
.pprefix 0x0 : AT ( _pprefix_lma ) {
_pprefix = .;
KEEP(*(.pprefix))
KEEP(*(.pprefix.*))
_mpprefix = .;
} .bss.pprefix (NOLOAD) : AT ( _end_lma ) {
_epprefix = .;
}
_pprefix_filesz = ABSOLUTE ( _mpprefix ) - ABSOLUTE ( _pprefix );
_pprefix_memsz = ABSOLUTE ( _epprefix ) - ABSOLUTE ( _pprefix );
/*
* Compressor information block
*
*/
.zinfo 0x0 : AT ( _zinfo_lma ) {
_zinfo = .;
KEEP(*(.zinfo))
KEEP(*(.zinfo.*))
_mzinfo = .;
} .bss.zinfo (NOLOAD) : AT ( _end_lma ) {
_ezinfo = .;
}
_zinfo_filesz = ABSOLUTE ( _mzinfo ) - ABSOLUTE ( _zinfo );
_zinfo_memsz = ABSOLUTE ( _ezinfo ) - ABSOLUTE ( _zinfo );
/*
* Weak symbols that need zero values if not otherwise defined
*
*/
.weak 0x0 : AT ( _end_lma ) {
_weak = .;
*(.weak)
*(.weak.*)
_eweak = .;
}
_assert = ASSERT ( ( _weak == _eweak ), ".weak is non-zero length" );
/*
* Dispose of the comment and note sections to make the link map
* easier to read
*
*/
/DISCARD/ : {
*(.comment)
*(.comment.*)
*(.note)
*(.note.*)
*(.eh_frame)
*(.eh_frame.*)
*(.rel)
*(.rel.*)
*(.einfo)
*(.einfo.*)
*(.discard)
*(.discard.*)
}
/*
* Load address calculations. In older versions of ld, ALIGN()
* can operate only on the location counter, so we use that.
*
*/
. = 0;
. = ALIGN ( _max_align );
_prefix_lma = .;
. += _prefix_filesz;
. = ALIGN ( _max_align );
_text16_early_lma = .;
. += _text16_early_filesz;
. = ALIGN ( _max_align );
. = ALIGN ( _payload_align );
_pprefix_lma = .;
. += _pprefix_filesz;
. = ALIGN ( _max_align );
_payload_lma = .;
_pprefix_skip = ABSOLUTE ( _payload_lma ) - ABSOLUTE ( _pprefix_lma );
_text16_late_lma = .;
. += _text16_late_filesz;
. = ALIGN ( _max_align );
_data16_lma = .;
. += _data16_filesz;
. = ALIGN ( _max_align );
_textdata_lma = .;
. += _textdata_filesz;
_filesz = .; /* Do not include zinfo block in file size */
. = ALIGN ( _max_align );
_zinfo_lma = .;
. += _zinfo_filesz;
. = ALIGN ( _max_align );
_end_lma = .;
/*
* Values calculated to save code from doing it
*
*/
_text16_memsz_ppgh = ( ( ( _text16_memsz + 63 ) / 64 ) * 4 );
_data16_memsz_ppgh = ( ( ( _data16_memsz + 63 ) / 64 ) * 4 );
_textdata_memsz_pgh = ( ( _textdata_memsz + 15 ) / 16 );
_textdata_memsz_kb = ( ( _textdata_memsz + 1023 ) / 1024 );
}