mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 00:36:40 +07:00
166d97d961
CONFIG_STRICT_KERNEL_RWX requires a special alignment for DATA for some subarches. Today it is just defined as an #ifdef in vmlinux.lds.S In order to get more flexibility, this patch moves the definition of this alignment in Kconfig On some subarches, CONFIG_STRICT_KERNEL_RWX will require a special alignment of _etext. This patch also adds a configuration item for it in Kconfig Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
397 lines
8.7 KiB
ArmAsm
397 lines
8.7 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifdef CONFIG_PPC64
|
|
#define PROVIDE32(x) PROVIDE(__unused__##x)
|
|
#else
|
|
#define PROVIDE32(x) PROVIDE(x)
|
|
#endif
|
|
|
|
#define BSS_FIRST_SECTIONS *(.bss.prominit)
|
|
|
|
#include <asm/page.h>
|
|
#include <asm-generic/vmlinux.lds.h>
|
|
#include <asm/cache.h>
|
|
#include <asm/thread_info.h>
|
|
|
|
#define STRICT_ALIGN_SIZE (1 << CONFIG_DATA_SHIFT)
|
|
#define ETEXT_ALIGN_SIZE (1 << CONFIG_ETEXT_SHIFT)
|
|
|
|
ENTRY(_stext)
|
|
|
|
PHDRS {
|
|
kernel PT_LOAD FLAGS(7); /* RWX */
|
|
notes PT_NOTE FLAGS(0);
|
|
dummy PT_NOTE FLAGS(0);
|
|
|
|
/* binutils < 2.18 has a bug that makes it misbehave when taking an
|
|
ELF file with all segments at load address 0 as input. This
|
|
happens when running "strip" on vmlinux, because of the AT() magic
|
|
in this linker script. People using GCC >= 4.2 won't run into
|
|
this problem, because the "build-id" support will put some data
|
|
into the "notes" segment (at a non-zero load address).
|
|
|
|
To work around this, we force some data into both the "dummy"
|
|
segment and the kernel segment, so the dummy segment will get a
|
|
non-zero load address. It's not enough to always create the
|
|
"notes" segment, since if nothing gets assigned to it, its load
|
|
address will be zero. */
|
|
}
|
|
|
|
#ifdef CONFIG_PPC64
|
|
OUTPUT_ARCH(powerpc:common64)
|
|
jiffies = jiffies_64;
|
|
#else
|
|
OUTPUT_ARCH(powerpc:common)
|
|
jiffies = jiffies_64 + 4;
|
|
#endif
|
|
SECTIONS
|
|
{
|
|
. = KERNELBASE;
|
|
|
|
/*
|
|
* Text, read only data and other permanent read-only sections
|
|
*/
|
|
|
|
_text = .;
|
|
_stext = .;
|
|
|
|
/*
|
|
* Head text.
|
|
* This needs to be in its own output section to avoid ld placing
|
|
* branch trampoline stubs randomly throughout the fixed sections,
|
|
* which it will do (even if the branch comes from another section)
|
|
* in order to optimize stub generation.
|
|
*/
|
|
.head.text : AT(ADDR(.head.text) - LOAD_OFFSET) {
|
|
#ifdef CONFIG_PPC64
|
|
KEEP(*(.head.text.first_256B));
|
|
#ifdef CONFIG_PPC_BOOK3E
|
|
#else
|
|
KEEP(*(.head.text.real_vectors));
|
|
*(.head.text.real_trampolines);
|
|
KEEP(*(.head.text.virt_vectors));
|
|
*(.head.text.virt_trampolines);
|
|
# if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
|
|
KEEP(*(.head.data.fwnmi_page));
|
|
# endif
|
|
#endif
|
|
#else /* !CONFIG_PPC64 */
|
|
HEAD_TEXT
|
|
#endif
|
|
} :kernel
|
|
|
|
__head_end = .;
|
|
|
|
#ifdef CONFIG_PPC64
|
|
/*
|
|
* ALIGN(0) overrides the default output section alignment because
|
|
* this needs to start right after .head.text in order for fixed
|
|
* section placement to work.
|
|
*/
|
|
.text ALIGN(0) : AT(ADDR(.text) - LOAD_OFFSET) {
|
|
#ifdef CONFIG_LD_HEAD_STUB_CATCH
|
|
KEEP(*(.linker_stub_catch));
|
|
. = . ;
|
|
#endif
|
|
|
|
#else
|
|
.text : AT(ADDR(.text) - LOAD_OFFSET) {
|
|
ALIGN_FUNCTION();
|
|
#endif
|
|
/* careful! __ftr_alt_* sections need to be close to .text */
|
|
*(.text.hot TEXT_MAIN .text.fixup .text.unlikely .fixup __ftr_alt_* .ref.text);
|
|
#ifdef CONFIG_PPC64
|
|
*(.tramp.ftrace.text);
|
|
#endif
|
|
SCHED_TEXT
|
|
CPUIDLE_TEXT
|
|
LOCK_TEXT
|
|
KPROBES_TEXT
|
|
IRQENTRY_TEXT
|
|
SOFTIRQENTRY_TEXT
|
|
/*
|
|
* -Os builds call FP save/restore functions. The powerpc64
|
|
* linker generates those on demand in the .sfpr section.
|
|
* .sfpr gets placed at the beginning of a group of input
|
|
* sections, which can break start-of-text offset if it is
|
|
* included with the main text sections, so put it by itself.
|
|
*/
|
|
*(.sfpr);
|
|
MEM_KEEP(init.text)
|
|
MEM_KEEP(exit.text)
|
|
|
|
#ifdef CONFIG_PPC32
|
|
*(.got1)
|
|
__got2_start = .;
|
|
*(.got2)
|
|
__got2_end = .;
|
|
#endif /* CONFIG_PPC32 */
|
|
|
|
} :kernel
|
|
|
|
. = ALIGN(ETEXT_ALIGN_SIZE);
|
|
_etext = .;
|
|
PROVIDE32 (etext = .);
|
|
|
|
/* Read-only data */
|
|
RO_DATA(PAGE_SIZE)
|
|
|
|
#ifdef CONFIG_PPC64
|
|
. = ALIGN(8);
|
|
__stf_entry_barrier_fixup : AT(ADDR(__stf_entry_barrier_fixup) - LOAD_OFFSET) {
|
|
__start___stf_entry_barrier_fixup = .;
|
|
*(__stf_entry_barrier_fixup)
|
|
__stop___stf_entry_barrier_fixup = .;
|
|
}
|
|
|
|
. = ALIGN(8);
|
|
__stf_exit_barrier_fixup : AT(ADDR(__stf_exit_barrier_fixup) - LOAD_OFFSET) {
|
|
__start___stf_exit_barrier_fixup = .;
|
|
*(__stf_exit_barrier_fixup)
|
|
__stop___stf_exit_barrier_fixup = .;
|
|
}
|
|
|
|
. = ALIGN(8);
|
|
__rfi_flush_fixup : AT(ADDR(__rfi_flush_fixup) - LOAD_OFFSET) {
|
|
__start___rfi_flush_fixup = .;
|
|
*(__rfi_flush_fixup)
|
|
__stop___rfi_flush_fixup = .;
|
|
}
|
|
#endif /* CONFIG_PPC64 */
|
|
|
|
#ifdef CONFIG_PPC_BARRIER_NOSPEC
|
|
. = ALIGN(8);
|
|
__spec_barrier_fixup : AT(ADDR(__spec_barrier_fixup) - LOAD_OFFSET) {
|
|
__start___barrier_nospec_fixup = .;
|
|
*(__barrier_nospec_fixup)
|
|
__stop___barrier_nospec_fixup = .;
|
|
}
|
|
#endif /* CONFIG_PPC_BARRIER_NOSPEC */
|
|
|
|
#ifdef CONFIG_PPC_FSL_BOOK3E
|
|
. = ALIGN(8);
|
|
__spec_btb_flush_fixup : AT(ADDR(__spec_btb_flush_fixup) - LOAD_OFFSET) {
|
|
__start__btb_flush_fixup = .;
|
|
*(__btb_flush_fixup)
|
|
__stop__btb_flush_fixup = .;
|
|
}
|
|
#endif
|
|
EXCEPTION_TABLE(0)
|
|
|
|
NOTES :kernel :notes
|
|
|
|
/* The dummy segment contents for the bug workaround mentioned above
|
|
near PHDRS. */
|
|
.dummy : AT(ADDR(.dummy) - LOAD_OFFSET) {
|
|
LONG(0)
|
|
LONG(0)
|
|
LONG(0)
|
|
} :kernel :dummy
|
|
|
|
/*
|
|
* Init sections discarded at runtime
|
|
*/
|
|
. = ALIGN(STRICT_ALIGN_SIZE);
|
|
__init_begin = .;
|
|
. = ALIGN(PAGE_SIZE);
|
|
.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
|
|
_sinittext = .;
|
|
INIT_TEXT
|
|
_einittext = .;
|
|
#ifdef CONFIG_PPC64
|
|
*(.tramp.ftrace.init);
|
|
#endif
|
|
} :kernel
|
|
|
|
/* .exit.text is discarded at runtime, not link time,
|
|
* to deal with references from __bug_table
|
|
*/
|
|
.exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
|
|
EXIT_TEXT
|
|
}
|
|
|
|
.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
|
|
INIT_DATA
|
|
}
|
|
|
|
.init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
|
|
INIT_SETUP(16)
|
|
}
|
|
|
|
.initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET) {
|
|
INIT_CALLS
|
|
}
|
|
|
|
.con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
|
|
CON_INITCALL
|
|
}
|
|
|
|
. = ALIGN(8);
|
|
__ftr_fixup : AT(ADDR(__ftr_fixup) - LOAD_OFFSET) {
|
|
__start___ftr_fixup = .;
|
|
KEEP(*(__ftr_fixup))
|
|
__stop___ftr_fixup = .;
|
|
}
|
|
. = ALIGN(8);
|
|
__mmu_ftr_fixup : AT(ADDR(__mmu_ftr_fixup) - LOAD_OFFSET) {
|
|
__start___mmu_ftr_fixup = .;
|
|
KEEP(*(__mmu_ftr_fixup))
|
|
__stop___mmu_ftr_fixup = .;
|
|
}
|
|
. = ALIGN(8);
|
|
__lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
|
|
__start___lwsync_fixup = .;
|
|
KEEP(*(__lwsync_fixup))
|
|
__stop___lwsync_fixup = .;
|
|
}
|
|
#ifdef CONFIG_PPC64
|
|
. = ALIGN(8);
|
|
__fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
|
|
__start___fw_ftr_fixup = .;
|
|
KEEP(*(__fw_ftr_fixup))
|
|
__stop___fw_ftr_fixup = .;
|
|
}
|
|
#endif
|
|
.init.ramfs : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
|
|
INIT_RAM_FS
|
|
}
|
|
|
|
PERCPU_SECTION(L1_CACHE_BYTES)
|
|
|
|
. = ALIGN(8);
|
|
.machine.desc : AT(ADDR(.machine.desc) - LOAD_OFFSET) {
|
|
__machine_desc_start = . ;
|
|
KEEP(*(.machine.desc))
|
|
__machine_desc_end = . ;
|
|
}
|
|
#ifdef CONFIG_RELOCATABLE
|
|
. = ALIGN(8);
|
|
.dynsym : AT(ADDR(.dynsym) - LOAD_OFFSET)
|
|
{
|
|
#ifdef CONFIG_PPC32
|
|
__dynamic_symtab = .;
|
|
#endif
|
|
*(.dynsym)
|
|
}
|
|
.dynstr : AT(ADDR(.dynstr) - LOAD_OFFSET) { *(.dynstr) }
|
|
.dynamic : AT(ADDR(.dynamic) - LOAD_OFFSET)
|
|
{
|
|
__dynamic_start = .;
|
|
*(.dynamic)
|
|
}
|
|
.hash : AT(ADDR(.hash) - LOAD_OFFSET) { *(.hash) }
|
|
.interp : AT(ADDR(.interp) - LOAD_OFFSET) { *(.interp) }
|
|
.rela.dyn : AT(ADDR(.rela.dyn) - LOAD_OFFSET)
|
|
{
|
|
__rela_dyn_start = .;
|
|
*(.rela*)
|
|
}
|
|
#endif
|
|
/* .exit.data is discarded at runtime, not link time,
|
|
* to deal with references from .exit.text
|
|
*/
|
|
.exit.data : AT(ADDR(.exit.data) - LOAD_OFFSET) {
|
|
EXIT_DATA
|
|
}
|
|
|
|
/* freed after init ends here */
|
|
. = ALIGN(PAGE_SIZE);
|
|
__init_end = .;
|
|
|
|
/*
|
|
* And now the various read/write data
|
|
*/
|
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
_sdata = .;
|
|
|
|
#ifdef CONFIG_PPC32
|
|
.data : AT(ADDR(.data) - LOAD_OFFSET) {
|
|
DATA_DATA
|
|
#ifdef CONFIG_UBSAN
|
|
*(.data..Lubsan_data*)
|
|
*(.data..Lubsan_type*)
|
|
#endif
|
|
*(.data.rel*)
|
|
*(SDATA_MAIN)
|
|
*(.sdata2)
|
|
*(.got.plt) *(.got)
|
|
*(.plt)
|
|
*(.branch_lt)
|
|
}
|
|
#else
|
|
.data : AT(ADDR(.data) - LOAD_OFFSET) {
|
|
DATA_DATA
|
|
*(.data.rel*)
|
|
*(.toc1)
|
|
*(.branch_lt)
|
|
}
|
|
|
|
.opd : AT(ADDR(.opd) - LOAD_OFFSET) {
|
|
__start_opd = .;
|
|
KEEP(*(.opd))
|
|
__end_opd = .;
|
|
}
|
|
|
|
. = ALIGN(256);
|
|
.got : AT(ADDR(.got) - LOAD_OFFSET) {
|
|
__toc_start = .;
|
|
#ifndef CONFIG_RELOCATABLE
|
|
__prom_init_toc_start = .;
|
|
arch/powerpc/kernel/prom_init.o*(.toc .got)
|
|
__prom_init_toc_end = .;
|
|
#endif
|
|
*(.got)
|
|
*(.toc)
|
|
}
|
|
#endif
|
|
|
|
/* The initial task and kernel stack */
|
|
INIT_TASK_DATA_SECTION(THREAD_SIZE)
|
|
|
|
.data..page_aligned : AT(ADDR(.data..page_aligned) - LOAD_OFFSET) {
|
|
PAGE_ALIGNED_DATA(PAGE_SIZE)
|
|
}
|
|
|
|
.data..cacheline_aligned : AT(ADDR(.data..cacheline_aligned) - LOAD_OFFSET) {
|
|
CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
|
|
}
|
|
|
|
.data..read_mostly : AT(ADDR(.data..read_mostly) - LOAD_OFFSET) {
|
|
READ_MOSTLY_DATA(L1_CACHE_BYTES)
|
|
}
|
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
.data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
|
|
NOSAVE_DATA
|
|
}
|
|
|
|
BUG_TABLE
|
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
_edata = .;
|
|
PROVIDE32 (edata = .);
|
|
|
|
/*
|
|
* And finally the bss
|
|
*/
|
|
|
|
BSS_SECTION(0, 0, 0)
|
|
|
|
. = ALIGN(PAGE_SIZE);
|
|
_end = . ;
|
|
PROVIDE32 (end = .);
|
|
|
|
STABS_DEBUG
|
|
|
|
DWARF_DEBUG
|
|
|
|
DISCARDS
|
|
/DISCARD/ : {
|
|
*(*.EMB.apuinfo)
|
|
*(.glink .iplt .plt .rela* .comment)
|
|
*(.gnu.version*)
|
|
*(.gnu.attributes)
|
|
*(.eh_frame)
|
|
}
|
|
}
|