forked from Minki/linux
be092017b6
- virt_to_page/page_address optimisations - Support for NUMA systems described using device-tree - Support for hibernate/suspend-to-disk - Proper support for maxcpus= command line parameter - Detection and graceful handling of AArch64-only CPUs - Miscellaneous cleanups and non-critical fixes -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQEcBAABCgAGBQJXNbgkAAoJELescNyEwWM0PtcIAK11xaOMmSqXz8fcTeNLw4dS taaPWhjCYus8EhJyvTetfwk74+qVApdvKXKNKgODJXQEjeQx2brdUfbQZb31DTGT 798UYCAyEYCWkXspqi+/dpZEgUGPYH7uGOu2eDd19+PhTeX/EQSRX3fC9k0BNhvh PN9pOgRcKAlIExZ6QYmT0g56VLtbCfFShN41mQ8HdpShl6pPJuhQ+kDDzudmRjuD 11/oYuOaVTnwbPuXn+sjOrWvMkfINHI70BAQnnBs0v+5c45mzpqEMsy0dYo2Pl2m ar5lUFVIZggQkiqcOzqBzEgF+4gNw4LUu1DgK6cNKNMtL6k8E9zeOZMWeSVr0lg= =bT5E -----END PGP SIGNATURE----- Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Will Deacon: - virt_to_page/page_address optimisations - support for NUMA systems described using device-tree - support for hibernate/suspend-to-disk - proper support for maxcpus= command line parameter - detection and graceful handling of AArch64-only CPUs - miscellaneous cleanups and non-critical fixes * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (92 commits) arm64: do not enforce strict 16 byte alignment to stack pointer arm64: kernel: Fix incorrect brk randomization arm64: cpuinfo: Missing NULL terminator in compat_hwcap_str arm64: secondary_start_kernel: Remove unnecessary barrier arm64: Ensure pmd_present() returns false after pmd_mknotpresent() arm64: Replace hard-coded values in the pmd/pud_bad() macros arm64: Implement pmdp_set_access_flags() for hardware AF/DBM arm64: Fix typo in the pmdp_huge_get_and_clear() definition arm64: mm: remove unnecessary EXPORT_SYMBOL_GPL arm64: always use STRICT_MM_TYPECHECKS arm64: kvm: Fix kvm teardown for systems using the extended idmap arm64: kaslr: increase randomization granularity arm64: kconfig: drop CONFIG_RTC_LIB dependency arm64: make ARCH_SUPPORTS_DEBUG_PAGEALLOC depend on !HIBERNATION arm64: hibernate: Refuse to hibernate if the boot cpu is offline arm64: kernel: Add support for hibernate/suspend-to-disk PM / Hibernate: Call flush_icache_range() on pages restored in-place arm64: Add new asm macro copy_page arm64: Promote KERNEL_START/KERNEL_END definitions to a header file arm64: kernel: Include _AC definition in page.h ...
122 lines
4.3 KiB
C
122 lines
4.3 KiB
C
/*
|
|
* Linker script macros to generate Image header fields.
|
|
*
|
|
* Copyright (C) 2014 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef __ASM_IMAGE_H
|
|
#define __ASM_IMAGE_H
|
|
|
|
#ifndef LINKER_SCRIPT
|
|
#error This file should only be included in vmlinux.lds.S
|
|
#endif
|
|
|
|
/*
|
|
* There aren't any ELF relocations we can use to endian-swap values known only
|
|
* at link time (e.g. the subtraction of two symbol addresses), so we must get
|
|
* the linker to endian-swap certain values before emitting them.
|
|
*
|
|
* Note that, in order for this to work when building the ELF64 PIE executable
|
|
* (for KASLR), these values should not be referenced via R_AARCH64_ABS64
|
|
* relocations, since these are fixed up at runtime rather than at build time
|
|
* when PIE is in effect. So we need to split them up in 32-bit high and low
|
|
* words.
|
|
*/
|
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
|
#define DATA_LE32(data) \
|
|
((((data) & 0x000000ff) << 24) | \
|
|
(((data) & 0x0000ff00) << 8) | \
|
|
(((data) & 0x00ff0000) >> 8) | \
|
|
(((data) & 0xff000000) >> 24))
|
|
#else
|
|
#define DATA_LE32(data) ((data) & 0xffffffff)
|
|
#endif
|
|
|
|
#define DEFINE_IMAGE_LE64(sym, data) \
|
|
sym##_lo32 = DATA_LE32((data) & 0xffffffff); \
|
|
sym##_hi32 = DATA_LE32((data) >> 32)
|
|
|
|
#ifdef CONFIG_CPU_BIG_ENDIAN
|
|
#define __HEAD_FLAG_BE 1
|
|
#else
|
|
#define __HEAD_FLAG_BE 0
|
|
#endif
|
|
|
|
#define __HEAD_FLAG_PAGE_SIZE ((PAGE_SHIFT - 10) / 2)
|
|
|
|
#define __HEAD_FLAG_PHYS_BASE 1
|
|
|
|
#define __HEAD_FLAGS ((__HEAD_FLAG_BE << 0) | \
|
|
(__HEAD_FLAG_PAGE_SIZE << 1) | \
|
|
(__HEAD_FLAG_PHYS_BASE << 3))
|
|
|
|
/*
|
|
* These will output as part of the Image header, which should be little-endian
|
|
* regardless of the endianness of the kernel. While constant values could be
|
|
* endian swapped in head.S, all are done here for consistency.
|
|
*/
|
|
#define HEAD_SYMBOLS \
|
|
DEFINE_IMAGE_LE64(_kernel_size_le, _end - _text); \
|
|
DEFINE_IMAGE_LE64(_kernel_offset_le, TEXT_OFFSET); \
|
|
DEFINE_IMAGE_LE64(_kernel_flags_le, __HEAD_FLAGS);
|
|
|
|
#ifdef CONFIG_EFI
|
|
|
|
__efistub_stext_offset = stext - _text;
|
|
|
|
/*
|
|
* Prevent the symbol aliases below from being emitted into the kallsyms
|
|
* table, by forcing them to be absolute symbols (which are conveniently
|
|
* ignored by scripts/kallsyms) rather than section relative symbols.
|
|
* The distinction is only relevant for partial linking, and only for symbols
|
|
* that are defined within a section declaration (which is not the case for
|
|
* the definitions below) so the resulting values will be identical.
|
|
*/
|
|
#define KALLSYMS_HIDE(sym) ABSOLUTE(sym)
|
|
|
|
/*
|
|
* The EFI stub has its own symbol namespace prefixed by __efistub_, to
|
|
* isolate it from the kernel proper. The following symbols are legally
|
|
* accessed by the stub, so provide some aliases to make them accessible.
|
|
* Only include data symbols here, or text symbols of functions that are
|
|
* guaranteed to be safe when executed at another offset than they were
|
|
* linked at. The routines below are all implemented in assembler in a
|
|
* position independent manner
|
|
*/
|
|
__efistub_memcmp = KALLSYMS_HIDE(__pi_memcmp);
|
|
__efistub_memchr = KALLSYMS_HIDE(__pi_memchr);
|
|
__efistub_memcpy = KALLSYMS_HIDE(__pi_memcpy);
|
|
__efistub_memmove = KALLSYMS_HIDE(__pi_memmove);
|
|
__efistub_memset = KALLSYMS_HIDE(__pi_memset);
|
|
__efistub_strlen = KALLSYMS_HIDE(__pi_strlen);
|
|
__efistub_strnlen = KALLSYMS_HIDE(__pi_strnlen);
|
|
__efistub_strcmp = KALLSYMS_HIDE(__pi_strcmp);
|
|
__efistub_strncmp = KALLSYMS_HIDE(__pi_strncmp);
|
|
__efistub___flush_dcache_area = KALLSYMS_HIDE(__pi___flush_dcache_area);
|
|
|
|
#ifdef CONFIG_KASAN
|
|
__efistub___memcpy = KALLSYMS_HIDE(__pi_memcpy);
|
|
__efistub___memmove = KALLSYMS_HIDE(__pi_memmove);
|
|
__efistub___memset = KALLSYMS_HIDE(__pi_memset);
|
|
#endif
|
|
|
|
__efistub__text = KALLSYMS_HIDE(_text);
|
|
__efistub__end = KALLSYMS_HIDE(_end);
|
|
__efistub__edata = KALLSYMS_HIDE(_edata);
|
|
__efistub_screen_info = KALLSYMS_HIDE(screen_info);
|
|
|
|
#endif
|
|
|
|
#endif /* __ASM_IMAGE_H */
|