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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2016-01-26 09:13:44 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2016-02-24 14:57:27 +0000
commit1e48ef7fcc374051730381a2a05da77eb4eafdb0 (patch)
treef7f7174e996accf28dfdeef5fa79a452e4dbfa41 /arch/arm64/kernel/vmlinux.lds.S
parent6c94f27ac847ff8ef15b3da5b200574923bd6287 (diff)
downloadblackbird-op-linux-1e48ef7fcc374051730381a2a05da77eb4eafdb0.tar.gz
blackbird-op-linux-1e48ef7fcc374051730381a2a05da77eb4eafdb0.zip
arm64: add support for building vmlinux as a relocatable PIE binary
This implements CONFIG_RELOCATABLE, which links the final vmlinux image with a dynamic relocation section, allowing the early boot code to perform a relocation to a different virtual address at runtime. This is a prerequisite for KASLR (CONFIG_RANDOMIZE_BASE). Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel/vmlinux.lds.S')
-rw-r--r--arch/arm64/kernel/vmlinux.lds.S16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
index 282e3e64a17e..e3f6cd740ea3 100644
--- a/arch/arm64/kernel/vmlinux.lds.S
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -87,6 +87,7 @@ SECTIONS
EXIT_CALL
*(.discard)
*(.discard.*)
+ *(.interp .dynamic)
}
. = KIMAGE_VADDR + TEXT_OFFSET;
@@ -149,6 +150,21 @@ SECTIONS
.altinstr_replacement : {
*(.altinstr_replacement)
}
+ .rela : ALIGN(8) {
+ __reloc_start = .;
+ *(.rela .rela*)
+ __reloc_end = .;
+ }
+ .dynsym : ALIGN(8) {
+ __dynsym_start = .;
+ *(.dynsym)
+ }
+ .dynstr : {
+ *(.dynstr)
+ }
+ .hash : {
+ *(.hash)
+ }
. = ALIGN(PAGE_SIZE);
__init_end = .;
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