| head.S (c3cee924bd855184d15bc4aa6088dcf8e2c1394c) | head.S (d7bea550279db28cd154fd54843ebc858ffdf0b7) |
|---|---|
| 1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Low-level CPU initialisation 4 * Based on arch/arm/kernel/head.S 5 * 6 * Copyright (C) 1994-2002 Russell King 7 * Copyright (C) 2003-2012 ARM Ltd. 8 * Authors: Catalin Marinas <catalin.marinas@arm.com> --- 743 unchanged lines hidden (view full) --- 752SYM_FUNC_END(__no_granule_support) 753 754#ifdef CONFIG_RELOCATABLE 755SYM_FUNC_START_LOCAL(__relocate_kernel) 756 /* 757 * Iterate over each entry in the relocation table, and apply the 758 * relocations in place. 759 */ | 1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Low-level CPU initialisation 4 * Based on arch/arm/kernel/head.S 5 * 6 * Copyright (C) 1994-2002 Russell King 7 * Copyright (C) 2003-2012 ARM Ltd. 8 * Authors: Catalin Marinas <catalin.marinas@arm.com> --- 743 unchanged lines hidden (view full) --- 752SYM_FUNC_END(__no_granule_support) 753 754#ifdef CONFIG_RELOCATABLE 755SYM_FUNC_START_LOCAL(__relocate_kernel) 756 /* 757 * Iterate over each entry in the relocation table, and apply the 758 * relocations in place. 759 */ |
| 760 ldr w9, =__rela_offset // offset to reloc table 761 ldr w10, =__rela_size // size of reloc table 762 | 760 adr_l x9, __rela_start 761 adr_l x10, __rela_end |
| 763 mov_q x11, KIMAGE_VADDR // default virtual offset 764 add x11, x11, x23 // actual virtual offset | 762 mov_q x11, KIMAGE_VADDR // default virtual offset 763 add x11, x11, x23 // actual virtual offset |
| 765 add x9, x9, x11 // __va(.rela) 766 add x10, x9, x10 // __va(.rela) + sizeof(.rela) | |
| 767 7680: cmp x9, x10 769 b.hs 1f 770 ldp x12, x13, [x9], #24 771 ldr x14, [x9, #-8] 772 cmp w13, #R_AARCH64_RELATIVE 773 b.ne 0b 774 add x14, x14, x23 // relocate --- 33 unchanged lines hidden (view full) --- 808 * bit in x14. 809 * 810 * Because addends are stored in place in the binary, RELR relocations 811 * cannot be applied idempotently. We use x24 to keep track of the 812 * currently applied displacement so that we can correctly relocate if 813 * __relocate_kernel is called twice with non-zero displacements (i.e. 814 * if there is both a physical misalignment and a KASLR displacement). 815 */ | 764 7650: cmp x9, x10 766 b.hs 1f 767 ldp x12, x13, [x9], #24 768 ldr x14, [x9, #-8] 769 cmp w13, #R_AARCH64_RELATIVE 770 b.ne 0b 771 add x14, x14, x23 // relocate --- 33 unchanged lines hidden (view full) --- 805 * bit in x14. 806 * 807 * Because addends are stored in place in the binary, RELR relocations 808 * cannot be applied idempotently. We use x24 to keep track of the 809 * currently applied displacement so that we can correctly relocate if 810 * __relocate_kernel is called twice with non-zero displacements (i.e. 811 * if there is both a physical misalignment and a KASLR displacement). 812 */ |
| 816 ldr w9, =__relr_offset // offset to reloc table 817 ldr w10, =__relr_size // size of reloc table 818 add x9, x9, x11 // __va(.relr) 819 add x10, x9, x10 // __va(.relr) + sizeof(.relr) | 813 adr_l x9, __relr_start 814 adr_l x10, __relr_end |
| 820 821 sub x15, x23, x24 // delta from previous offset 822 cbz x15, 7f // nothing to do if unchanged 823 mov x24, x23 // save new offset 824 8252: cmp x9, x10 826 b.hs 7f 827 ldr x11, [x9], #8 --- 75 unchanged lines hidden --- | 815 816 sub x15, x23, x24 // delta from previous offset 817 cbz x15, 7f // nothing to do if unchanged 818 mov x24, x23 // save new offset 819 8202: cmp x9, x10 821 b.hs 7f 822 ldr x11, [x9], #8 --- 75 unchanged lines hidden --- |