Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 268 insertions, 0 deletions

diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
new file mode 100644
index 000000000..370089455
--- /dev/null
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -0,0 +1,268 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * ld script to make ARM Linux kernel
+ * taken from the i386 version by Russell King
+ * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+ */
+
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/cache.h>
+#include <asm/kernel-pgtable.h>
+#include <asm/thread_info.h>
+#include <asm/memory.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+
+#include "image.h"
+
+/* .exit.text needed in case of alternative patching */
+#define ARM_EXIT_KEEP(x)	x
+#define ARM_EXIT_DISCARD(x)
+
+OUTPUT_ARCH(aarch64)
+ENTRY(_text)
+
+jiffies = jiffies_64;
+
+
+#define HYPERVISOR_EXTABLE					\
+	. = ALIGN(SZ_8);					\
+	__start___kvm_ex_table = .;				\
+	*(__kvm_ex_table)					\
+	__stop___kvm_ex_table = .;
+
+#define HYPERVISOR_TEXT					\
+	/*						\
+	 * Align to 4 KB so that			\
+	 * a) the HYP vector table is at its minimum	\
+	 *    alignment of 2048 bytes			\
+	 * b) the HYP init code will not cross a page	\
+	 *    boundary if its size does not exceed	\
+	 *    4 KB (see related ASSERT() below)		\
+	 */						\
+	. = ALIGN(SZ_4K);				\
+	__hyp_idmap_text_start = .;			\
+	*(.hyp.idmap.text)				\
+	__hyp_idmap_text_end = .;			\
+	__hyp_text_start = .;				\
+	*(.hyp.text)					\
+	HYPERVISOR_EXTABLE				\
+	__hyp_text_end = .;
+
+#define IDMAP_TEXT					\
+	. = ALIGN(SZ_4K);				\
+	__idmap_text_start = .;				\
+	*(.idmap.text)					\
+	__idmap_text_end = .;
+
+#ifdef CONFIG_HIBERNATION
+#define HIBERNATE_TEXT					\
+	. = ALIGN(SZ_4K);				\
+	__hibernate_exit_text_start = .;		\
+	*(.hibernate_exit.text)				\
+	__hibernate_exit_text_end = .;
+#else
+#define HIBERNATE_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 = .;
+#else
+#define TRAMP_TEXT
+#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
+ * FileAlignment, which we set to its minimum value of 0x200. 'stext'
+ * itself is 4 KB aligned, so padding out _edata to a 0x200 aligned
+ * boundary should be sufficient.
+ */
+PECOFF_FILE_ALIGNMENT = 0x200;
+
+#ifdef CONFIG_EFI
+#define PECOFF_EDATA_PADDING	\
+	.pecoff_edata_padding : { BYTE(0); . = ALIGN(PECOFF_FILE_ALIGNMENT); }
+#else
+#define PECOFF_EDATA_PADDING
+#endif
+
+SECTIONS
+{
+	/*
+	 * XXX: The linker does not define how output sections are
+	 * assigned to input sections when there are multiple statements
+	 * matching the same input section name.  There is no documented
+	 * order of matching.
+	 */
+	/DISCARD/ : {
+		ARM_EXIT_DISCARD(EXIT_TEXT)
+		ARM_EXIT_DISCARD(EXIT_DATA)
+		EXIT_CALL
+		*(.discard)
+		*(.discard.*)
+		*(.interp .dynamic)
+		*(.dynsym .dynstr .hash .gnu.hash)
+		*(.eh_frame)
+	}
+
+	. = KIMAGE_VADDR + TEXT_OFFSET;
+
+	.head.text : {
+		_text = .;
+		HEAD_TEXT
+	}
+	.text : {			/* Real text segment		*/
+		_stext = .;		/* Text and read-only data	*/
+			__exception_text_start = .;
+			*(.exception.text)
+			__exception_text_end = .;
+			IRQENTRY_TEXT
+			SOFTIRQENTRY_TEXT
+			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 */
+
+	RO_DATA(PAGE_SIZE)		/* everything from this point to     */
+	EXCEPTION_TABLE(8)		/* __init_begin will be marked RO NX */
+	NOTES
+
+	. = ALIGN(SEGMENT_ALIGN);
+	__init_begin = .;
+	__inittext_begin = .;
+
+	INIT_TEXT_SECTION(8)
+	.exit.text : {
+		ARM_EXIT_KEEP(EXIT_TEXT)
+	}
+
+	. = ALIGN(4);
+	.altinstructions : {
+		__alt_instructions = .;
+		*(.altinstructions)
+		__alt_instructions_end = .;
+	}
+
+	. = ALIGN(PAGE_SIZE);
+	__inittext_end = .;
+	__initdata_begin = .;
+
+	.init.data : {
+		INIT_DATA
+		INIT_SETUP(16)
+		INIT_CALLS
+		CON_INITCALL
+		SECURITY_INITCALL
+		INIT_RAM_FS
+		*(.init.rodata.* .init.bss)	/* from the EFI stub */
+	}
+	.exit.data : {
+		ARM_EXIT_KEEP(EXIT_DATA)
+	}
+
+	PERCPU_SECTION(L1_CACHE_BYTES)
+
+	.rela.dyn : ALIGN(8) {
+		*(.rela .rela*)
+	}
+
+	__rela_offset	= ABSOLUTE(ADDR(.rela.dyn) - KIMAGE_VADDR);
+	__rela_size	= SIZEOF(.rela.dyn);
+
+	. = ALIGN(SEGMENT_ALIGN);
+	__initdata_end = .;
+	__init_end = .;
+
+	_data = .;
+	_sdata = .;
+	RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_ALIGN)
+
+	/*
+	 * Data written with the MMU off but read with the MMU on requires
+	 * cache lines to be invalidated, discarding up to a Cache Writeback
+	 * Granule (CWG) of data from the cache. Keep the section that
+	 * requires this type of maintenance to be in its own Cache Writeback
+	 * Granule (CWG) area so the cache maintenance operations don't
+	 * interfere with adjacent data.
+	 */
+	.mmuoff.data.write : ALIGN(SZ_2K) {
+		__mmuoff_data_start = .;
+		*(.mmuoff.data.write)
+	}
+	. = ALIGN(SZ_2K);
+	.mmuoff.data.read : {
+		*(.mmuoff.data.read)
+		__mmuoff_data_end = .;
+	}
+
+	PECOFF_EDATA_PADDING
+	__pecoff_data_rawsize = ABSOLUTE(. - __initdata_begin);
+	_edata = .;
+
+	BSS_SECTION(0, 0, 0)
+
+	. = ALIGN(PAGE_SIZE);
+	idmap_pg_dir = .;
+	. += IDMAP_DIR_SIZE;
+
+#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
+	tramp_pg_dir = .;
+	. += PAGE_SIZE;
+#endif
+
+#ifdef CONFIG_ARM64_SW_TTBR0_PAN
+	reserved_ttbr0 = .;
+	. += RESERVED_TTBR0_SIZE;
+#endif
+	swapper_pg_dir = .;
+	. += SWAPPER_DIR_SIZE;
+	swapper_pg_end = .;
+
+	__pecoff_data_size = ABSOLUTE(. - __initdata_begin);
+	_end = .;
+
+	STABS_DEBUG
+
+	HEAD_SYMBOLS
+}
+
+/*
+ * The HYP init code and ID map text can't be longer than a page each,
+ * and should not cross a page boundary.
+ */
+ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & ~(SZ_4K - 1)) <= SZ_4K,
+	"HYP init code too big or misaligned")
+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")
+#endif
+#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
+ASSERT((__entry_tramp_text_end - __entry_tramp_text_start) <= 3*PAGE_SIZE,
+	"Entry trampoline text too big")
+#endif
+/*
+ * If padding is applied before .head.text, virt<->phys conversions will fail.
+ */
+ASSERT(_text == (KIMAGE_VADDR + TEXT_OFFSET), "HEAD is misaligned")