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| author | Matt Redfearn | 2016-03-31 11:05:32 +0200 |
|---|---|---|
| committer | Ralf Baechle | 2016-05-13 14:02:01 +0200 |
| commit | 766c580356ecca88b32c47b8128bec7d6d014533 (patch) | |
| tree | c28f4c6d7d4b1fcb6d77cc7d7222cc1bb34ef594 /arch/mips/boot/tools/relocs_32.c | |
| parent | secomp: Constify mode1 syscall whitelist (diff) | |
| download | kernel-qcow2-linux-766c580356ecca88b32c47b8128bec7d6d014533.tar.gz kernel-qcow2-linux-766c580356ecca88b32c47b8128bec7d6d014533.tar.xz kernel-qcow2-linux-766c580356ecca88b32c47b8128bec7d6d014533.zip | |
MIPS: tools: Add relocs tool
This tool is based on the x86/boot/tools/relocs tool.
It parses the relocations present in the vmlinux elf file, building a
table of relocations that will be necessary to run the kernel from an
address other than its link address. This table is inserted into the
vmlinux elf, in the .data.relocs section. The table is subsequently used
by the code in arch/mips/kernel/relocate.c (added later) to relocate the
kernel.
The tool, by default, also marks all relocation sections as 0 length.
This is due to objcopy currently being unable to handle copying the
relocations between 64 and 32 bit elf files as is done when building a
64 bit kernel.
Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: kernel-hardening@lists.openwall.com
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12981/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/boot/tools/relocs_32.c')
| -rw-r--r-- | arch/mips/boot/tools/relocs_32.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/mips/boot/tools/relocs_32.c b/arch/mips/boot/tools/relocs_32.c new file mode 100644 index 000000000000..915bdc07f5ed --- /dev/null +++ b/arch/mips/boot/tools/relocs_32.c @@ -0,0 +1,17 @@ +#include "relocs.h" + +#define ELF_BITS 32 + +#define ELF_MACHINE EM_MIPS +#define ELF_MACHINE_NAME "MIPS" +#define SHT_REL_TYPE SHT_REL +#define Elf_Rel ElfW(Rel) + +#define ELF_CLASS ELFCLASS32 +#define ELF_R_SYM(val) ELF32_R_SYM(val) +#define ELF_R_TYPE(val) ELF32_R_TYPE(val) +#define ELF_ST_TYPE(o) ELF32_ST_TYPE(o) +#define ELF_ST_BIND(o) ELF32_ST_BIND(o) +#define ELF_ST_VISIBILITY(o) ELF32_ST_VISIBILITY(o) + +#include "relocs.c" |