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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-01-26 11:13:44 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2016-02-24 17:57:27 +0300 |
| commit | 1e48ef7fcc374051730381a2a05da77eb4eafdb0 (patch) | |
| tree | f7f7174e996accf28dfdeef5fa79a452e4dbfa41 /arch/arm64/kernel/vmlinux.lds.S | |
| parent | 6c94f27ac847ff8ef15b3da5b200574923bd6287 (diff) | |
| download | linux-1e48ef7fcc374051730381a2a05da77eb4eafdb0.tar.xz | |
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.S | 16 |
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 = .; |