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Diffstat (limited to 'arch/arm64/kernel/vmlinux.lds.S')
-rw-r--r--arch/arm64/kernel/vmlinux.lds.S132
1 files changed, 96 insertions, 36 deletions
diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
index 709d2c433c5e..ad6133b89e7a 100644
--- a/arch/arm64/kernel/vmlinux.lds.S
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -13,7 +13,7 @@
*(__kvm_ex_table) \
__stop___kvm_ex_table = .;
-#define HYPERVISOR_DATA_SECTIONS \
+#define HYPERVISOR_RODATA_SECTIONS \
HYP_SECTION_NAME(.rodata) : { \
. = ALIGN(PAGE_SIZE); \
__hyp_rodata_start = .; \
@@ -23,6 +23,15 @@
__hyp_rodata_end = .; \
}
+#define HYPERVISOR_DATA_SECTION \
+ HYP_SECTION_NAME(.data) : { \
+ . = ALIGN(PAGE_SIZE); \
+ __hyp_data_start = .; \
+ *(HYP_SECTION_NAME(.data)) \
+ . = ALIGN(PAGE_SIZE); \
+ __hyp_data_end = .; \
+ }
+
#define HYPERVISOR_PERCPU_SECTION \
. = ALIGN(PAGE_SIZE); \
HYP_SECTION_NAME(.data..percpu) : { \
@@ -51,18 +60,20 @@
#define SBSS_ALIGN PAGE_SIZE
#else /* CONFIG_KVM */
#define HYPERVISOR_EXTABLE
-#define HYPERVISOR_DATA_SECTIONS
+#define HYPERVISOR_RODATA_SECTIONS
+#define HYPERVISOR_DATA_SECTION
#define HYPERVISOR_PERCPU_SECTION
#define HYPERVISOR_RELOC_SECTION
#define SBSS_ALIGN 0
#endif
-#define RO_EXCEPTION_TABLE_ALIGN 8
+#define RO_EXCEPTION_TABLE_ALIGN 4
#define RUNTIME_DISCARD_EXIT
#include <asm-generic/vmlinux.lds.h>
#include <asm/cache.h>
#include <asm/kernel-pgtable.h>
+#include <asm/kexec.h>
#include <asm/memory.h>
#include <asm/page.h>
@@ -92,7 +103,7 @@ jiffies = jiffies_64;
#ifdef CONFIG_HIBERNATION
#define HIBERNATE_TEXT \
- . = ALIGN(SZ_4K); \
+ ALIGN_FUNCTION(); \
__hibernate_exit_text_start = .; \
*(.hibernate_exit.text) \
__hibernate_exit_text_end = .;
@@ -100,17 +111,39 @@ jiffies = jiffies_64;
#define HIBERNATE_TEXT
#endif
+#ifdef CONFIG_KEXEC_CORE
+#define KEXEC_TEXT \
+ ALIGN_FUNCTION(); \
+ __relocate_new_kernel_start = .; \
+ *(.kexec_relocate.text) \
+ __relocate_new_kernel_end = .;
+#else
+#define KEXEC_TEXT
+#endif
+
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
#define TRAMP_TEXT \
. = ALIGN(PAGE_SIZE); \
__entry_tramp_text_start = .; \
*(.entry.tramp.text) \
. = ALIGN(PAGE_SIZE); \
- __entry_tramp_text_end = .;
+ __entry_tramp_text_end = .; \
+ *(.entry.tramp.rodata)
#else
#define TRAMP_TEXT
#endif
+#ifdef CONFIG_UNWIND_TABLES
+#define UNWIND_DATA_SECTIONS \
+ .eh_frame : { \
+ __pi___eh_frame_start = .; \
+ *(.eh_frame) \
+ __pi___eh_frame_end = .; \
+ }
+#else
+#define UNWIND_DATA_SECTIONS
+#endif
+
/*
* The size of the PE/COFF section that covers the kernel image, which
* runs from _stext to _edata, must be a round multiple of the PE/COFF
@@ -139,6 +172,7 @@ SECTIONS
/DISCARD/ : {
*(.interp .dynamic)
*(.dynsym .dynstr .hash .gnu.hash)
+ *(.ARM.attributes)
}
. = KIMAGE_VADDR;
@@ -154,19 +188,21 @@ SECTIONS
ENTRY_TEXT
TEXT_TEXT
SCHED_TEXT
- CPUIDLE_TEXT
LOCK_TEXT
KPROBES_TEXT
HYPERVISOR_TEXT
- IDMAP_TEXT
- HIBERNATE_TEXT
- TRAMP_TEXT
- *(.fixup)
*(.gnu.warning)
- . = ALIGN(16);
- *(.got) /* Global offset table */
}
+ . = ALIGN(SEGMENT_ALIGN);
+ _etext = .; /* End of text section */
+
+ /* everything from this point to __init_begin will be marked RO NX */
+ RO_DATA(PAGE_SIZE)
+
+ HYPERVISOR_RODATA_SECTIONS
+
+ .got : { *(.got) }
/*
* Make sure that the .got.plt is either completely empty or it
* contains only the lazy dispatch entries.
@@ -175,15 +211,17 @@ SECTIONS
ASSERT(SIZEOF(.got.plt) == 0 || SIZEOF(.got.plt) == 0x18,
"Unexpected GOT/PLT entries detected!")
- . = ALIGN(SEGMENT_ALIGN);
- _etext = .; /* End of text section */
-
- /* everything from this point to __init_begin will be marked RO NX */
- RO_DATA(PAGE_SIZE)
+ /* code sections that are never executed via the kernel mapping */
+ .rodata.text : {
+ TRAMP_TEXT
+ HIBERNATE_TEXT
+ KEXEC_TEXT
+ IDMAP_TEXT
+ . = ALIGN(PAGE_SIZE);
+ }
idmap_pg_dir = .;
- . += IDMAP_DIR_SIZE;
- idmap_pg_end = .;
+ . += PAGE_SIZE;
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
tramp_pg_dir = .;
@@ -215,10 +253,16 @@ SECTIONS
__alt_instructions_end = .;
}
+ UNWIND_DATA_SECTIONS
+
. = ALIGN(SEGMENT_ALIGN);
__inittext_end = .;
__initdata_begin = .;
+ __pi_init_idmap_pg_dir = .;
+ . += INIT_IDMAP_DIR_SIZE;
+ __pi_init_idmap_pg_end = .;
+
.init.data : {
INIT_DATA
INIT_SETUP(16)
@@ -231,36 +275,37 @@ SECTIONS
EXIT_DATA
}
+ RUNTIME_CONST_VARIABLES
+
PERCPU_SECTION(L1_CACHE_BYTES)
HYPERVISOR_PERCPU_SECTION
HYPERVISOR_RELOC_SECTION
.rela.dyn : ALIGN(8) {
+ __pi_rela_start = .;
*(.rela .rela*)
+ __pi_rela_end = .;
}
- __rela_offset = ABSOLUTE(ADDR(.rela.dyn) - KIMAGE_VADDR);
- __rela_size = SIZEOF(.rela.dyn);
-
-#ifdef CONFIG_RELR
.relr.dyn : ALIGN(8) {
+ __pi_relr_start = .;
*(.relr.dyn)
+ __pi_relr_end = .;
}
- __relr_offset = ABSOLUTE(ADDR(.relr.dyn) - KIMAGE_VADDR);
- __relr_size = SIZEOF(.relr.dyn);
-#endif
-
. = ALIGN(SEGMENT_ALIGN);
__initdata_end = .;
__init_end = .;
+ .data.rel.ro : { *(.data.rel.ro) }
+ ASSERT(SIZEOF(.data.rel.ro) == 0, "Unexpected RELRO detected!")
+
_data = .;
_sdata = .;
RW_DATA(L1_CACHE_BYTES, PAGE_SIZE, THREAD_ALIGN)
- HYPERVISOR_DATA_SECTIONS
+ HYPERVISOR_DATA_SECTION
/*
* Data written with the MMU off but read with the MMU on requires
@@ -284,16 +329,23 @@ SECTIONS
__pecoff_data_rawsize = ABSOLUTE(. - __initdata_begin);
_edata = .;
+ /* start of zero-init region */
BSS_SECTION(SBSS_ALIGN, 0, 0)
+ __pi___bss_start = __bss_start;
. = ALIGN(PAGE_SIZE);
- init_pg_dir = .;
+ __pi_init_pg_dir = .;
. += INIT_DIR_SIZE;
- init_pg_end = .;
+ __pi_init_pg_end = .;
+ /* end of zero-init region */
+
+ . += SZ_4K; /* stack for the early C runtime */
+ early_init_stack = .;
. = ALIGN(SEGMENT_ALIGN);
__pecoff_data_size = ABSOLUTE(. - __initdata_begin);
_end = .;
+ __pi__end = .;
STABS_DEBUG
DWARF_DEBUG
@@ -309,9 +361,6 @@ SECTIONS
*(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt)
}
ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
-
- .data.rel.ro : { *(.data.rel.ro) }
- ASSERT(SIZEOF(.data.rel.ro) == 0, "Unexpected RELRO detected!")
}
#include "image-vars.h"
@@ -326,11 +375,13 @@ ASSERT(__hyp_idmap_text_end - __hyp_idmap_text_start <= PAGE_SIZE,
ASSERT(__idmap_text_end - (__idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K,
"ID map text too big or misaligned")
#ifdef CONFIG_HIBERNATION
-ASSERT(__hibernate_exit_text_end - (__hibernate_exit_text_start & ~(SZ_4K - 1))
- <= SZ_4K, "Hibernate exit text too big or misaligned")
+ASSERT(__hibernate_exit_text_end - __hibernate_exit_text_start <= SZ_4K,
+ "Hibernate exit text is bigger than 4 KiB")
+ASSERT(__hibernate_exit_text_start == swsusp_arch_suspend_exit,
+ "Hibernate exit text does not start with swsusp_arch_suspend_exit")
#endif
#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
-ASSERT((__entry_tramp_text_end - __entry_tramp_text_start) == PAGE_SIZE,
+ASSERT((__entry_tramp_text_end - __entry_tramp_text_start) <= 3*PAGE_SIZE,
"Entry trampoline text too big")
#endif
#ifdef CONFIG_KVM
@@ -348,3 +399,12 @@ ASSERT(swapper_pg_dir - reserved_pg_dir == RESERVED_SWAPPER_OFFSET,
ASSERT(swapper_pg_dir - tramp_pg_dir == TRAMP_SWAPPER_OFFSET,
"TRAMP_SWAPPER_OFFSET is wrong!")
#endif
+
+#ifdef CONFIG_KEXEC_CORE
+/* kexec relocation code should fit into one KEXEC_CONTROL_PAGE_SIZE */
+ASSERT(__relocate_new_kernel_end - __relocate_new_kernel_start <= SZ_4K,
+ "kexec relocation code is bigger than 4 KiB")
+ASSERT(KEXEC_CONTROL_PAGE_SIZE >= SZ_4K, "KEXEC_CONTROL_PAGE_SIZE is broken")
+ASSERT(__relocate_new_kernel_start == arm64_relocate_new_kernel,
+ "kexec control page does not start with arm64_relocate_new_kernel")
+#endif
generated by cgit (git 2.34.1) at 2025-12-26 07:03:59 +0000