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[linux] Centralise the linker script for Linux binaries 

Reduce duplication between i386 and x86_64 by providing a single
shared linker script that both architectures can include.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/858/head
Michael Brown 2023-01-22 12:05:14 +00:00
parent a99e435c8e
commit 475c0dfa8e
5 changed files with 9 additions and 116 deletions
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4
src/Makefile.linux
View File

@ -8,6 +8,10 @@ SYMBOL_PREFIX = _ipxe__
#
CFLAGS += -UNVALGRIND
# The Linux linker script
#
LDSCRIPT = scripts/linux.lds
# Use a two-stage link
#
LDFLAGS += -r -d

4
src/arch/i386/Makefile.linux
View File

@ -1,8 +1,8 @@
# -*- makefile -*- : Force emacs to use Makefile mode
# Linker script
# Starting virtual address
#
LDSCRIPT = arch/i386/scripts/linux.lds
LDFLAGS += -Ttext=0x08048000
# Compiler flags for building host API wrapper
#

4
src/arch/x86_64/Makefile.linux
View File

@ -1,8 +1,8 @@
# -*- makefile -*- : Force emacs to use Makefile mode
# Linker script
# Starting virtual address
#
LDSCRIPT = arch/x86_64/scripts/linux.lds
LDFLAGS += -Ttext=0x400000
# Include generic Linux Makefile
#

106
src/arch/x86_64/scripts/linux.lds
View File

@ -1,106 +0,0 @@
/* -*- sh -*- */
/*
* Linker script for x86_64 Linux images
*
*/
OUTPUT_FORMAT ( "elf64-x86-64", "elf64-x86-64", "elf64-x86-64" )
OUTPUT_ARCH ( i386:x86-64 )
SECTIONS {
_max_align = 32;
. = 0x400000;
/*
* The text section
*
*/
. = ALIGN ( _max_align );
.text : {
_text = .;
*(.text)
*(.text.*)
_etext = .;
}
/*
* The rodata section
*
*/
. = ALIGN ( _max_align );
.rodata : {
_rodata = .;
*(.rodata)
*(.rodata.*)
_erodata = .;
}
/*
* The data section
*
* 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 (CONSTANT (MAXPAGESIZE)) - ((CONSTANT (MAXPAGESIZE) - .) & (CONSTANT (MAXPAGESIZE) - 1));
. = DATA_SEGMENT_ALIGN (CONSTANT (MAXPAGESIZE), CONSTANT (COMMONPAGESIZE));
.data : {
_data = .;
*(.data)
*(.data.*)
KEEP(*(SORT(.tbl.*)))
KEEP(*(.provided))
KEEP(*(.provided.*))
_edata = .;
}
/*
* The bss section
*
*/
. = ALIGN ( _max_align );
.bss : {
_bss = .;
*(.bss)
*(.bss.*)
*(COMMON)
_ebss = .;
}
/*
* Weak symbols that need zero values if not otherwise defined
*
*/
.weak 0x0 : {
_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.*)
*(.rel)
*(.rel.*)
*(.discard)
*(.discard.*)
*(.sbat)
*(.sbat.*)
}
}

7
src/arch/i386/scripts/linux.lds → src/scripts/linux.lds
View File

@ -1,18 +1,13 @@
/* -*- sh -*- */
/*
* Linker script for i386 Linux images
* Linker script for Linux images
*
*/
OUTPUT_FORMAT ( "elf32-i386", "elf32-i386", "elf32-i386" )
OUTPUT_ARCH ( i386 )
SECTIONS {
_max_align = 32;
. = 0x08048000;
/*
* The text section
*