freebsd-dev/sys/conf/ldscript.arm
Ed Maste 74cd06b42e Expose the kernel's build-ID through sysctl
After our migration (of certain architectures) to lld the kernel is built
with a unique build-ID.  Make it available via a sysctl and uname(1) to
allow the user to identify their running kernel.

Submitted by:	Ali Mashtizadeh <ali_mashtizadeh.com>
MFC after:	2 weeks
Relnotes:	Yes
Event:		Waterloo Hackathon 2019
Differential Revision:	https://reviews.freebsd.org/D20326
2019-06-04 13:07:10 +00:00

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4.6 KiB
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/* $FreeBSD$ */
OUTPUT_ARCH(arm)
ENTRY(_start)
SEARCH_DIR(/usr/lib);
SECTIONS
{
/* Read-only sections, merged into text segment: */
. = KERNVIRTADDR + SIZEOF_HEADERS;
.text :
{
*(.text)
*(.stub)
/* .gnu.warning sections are handled specially by elf32.em. */
*(.gnu.warning)
*(.gnu.linkonce.t*)
} =0x9090
_etext = .;
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.fini : { *(.fini) } =0x9090
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.rodata1 : { *(.rodata1) }
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.dynstr : { *(.dynstr) }
.gnu.version : { *(.gnu.version) }
.gnu.version_d : { *(.gnu.version_d) }
.gnu.version_r : { *(.gnu.version_r) }
.note.gnu.build-id : {
PROVIDE (__build_id_start = .);
*(.note.gnu.build-id)
PROVIDE (__build_id_end = .);
}
.rel.text :
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.rel.bss : { *(.rel.bss) }
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.rel.plt : { *(.rel.plt) }
.rela.plt : { *(.rela.plt) }
.init : { *(.init) } =0x9090
.plt : { *(.plt) }
. = ALIGN(4);
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PROVIDE(extab_start = .);
.ARM.extab : { *(.ARM.extab) }
_extab.end = .;
PROVIDE(extab_end = .);
_exidx_start = .;
PROVIDE(exidx_start = .);
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PROVIDE(exidx_end = .);
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the same address within the page on the next page up. */
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.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. */
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_edata = .;
PROVIDE (edata = .);
__bss_start = .;
.sbss : { *(.sbss) *(.scommon) }
.bss :
{
*(.dynbss)
*(.bss)
*(COMMON)
. = ALIGN(32 / 8);
_ebss = .;
/* A section for the initial page table, it doesn't need to be in the
kernel file, however unlike normal .bss entries should not be zeroed
out as we use it before the .bss section is cleared. */
*(.init_pagetable)
}
. = ALIGN(32 / 8);
_end = . ;
PROVIDE (end = .);
/* Stabs debugging sections. */
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/* 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 */
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.line 0 : { *(.line) }
/* GNU DWARF 1 extensions */
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/* These must appear regardless of . */
}