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arm64: head: use relative references to the RELA and RELR tables

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Formerly, we had to access the RELA and RELR tables via the kernel
mapping that was being relocated, and so deriving the start and end
addresses using ADRP/ADD references was not possible, as the relocation
code runs from the ID map.

Now that we map the entire kernel image via the ID map, we can simplify
this, and just load the entries via the ID map as well.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20220624150651.1358849-14-ardb@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Ard Biesheuvel
2022-06-24 17:06:43 +02:00
committed by Will Deacon
parent c3cee924bd
commit d7bea55027
2 changed files with 8 additions and 17 deletions
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12
arch/arm64/kernel/vmlinux.lds.S
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@@ -256,21 +256,17 @@ SECTIONS
HYPERVISOR_RELOC_SECTION
.rela.dyn : ALIGN(8) {
__rela_start = .;
*(.rela .rela*)
__rela_end = .;
}
__rela_offset = ABSOLUTE(ADDR(.rela.dyn) - KIMAGE_VADDR);
__rela_size = SIZEOF(.rela.dyn);
#ifdef CONFIG_RELR
.relr.dyn : ALIGN(8) {
__relr_start = .;
*(.relr.dyn)
__relr_end = .;
}
__relr_offset = ABSOLUTE(ADDR(.relr.dyn) - KIMAGE_VADDR);
__relr_size = SIZEOF(.relr.dyn);
#endif
. = ALIGN(SEGMENT_ALIGN);
__initdata_end = .;
__init_end = .;