Hi everybody following the discussion with Dave and AKASHI, here are the common code patches extracted from my recent patch set (Add kexec_file_load support to s390) [1]. The patches were extracted to allow upstream integration together with AKASHI's common code patches before the arch code gets adjusted to the new base. The reason for this series is to prepare common code for adding kexec_file_load to s390 as well as cleaning up the mis-use of the sh_offset field during purgatory load. In detail this series contains: Patch #1&2: Minor cleanups/fixes. Patch #3-9: Clean up the purgatory load/relocation code. Especially remove the mis-use of the purgatory_info->sechdrs->sh_offset field, currently holding a pointer into either kexec_purgatory (ro) or purgatory_buf (rw) depending on the section. With these patches the section address will be calculated verbosely and sh_offset will contain the offset of the section in the stripped purgatory binary (purgatory_buf). Patch #10: Allows architectures to set the purgatory load address. This patch is important for s390 as the kernel and purgatory have to be loaded to fixed addresses. In current code this is impossible as the purgatory load is opaque to the architecture. Patch #11: Moves x86 purgatories sha implementation to common lib/ directory to allow reuse in other architectures. The patches apply to v4.16-rc3. There are no changes compared to [1] (all requested changes only affected s390 code). Please note that I had to touch arch code for x86 and power a little. In theory this should not change the behavior but I don't have a way to test it. Cross-compiling with defconfig [2] works fine for both. Thanks Philipp [1] http://lists.infradead.org/pipermail/kexec/2018-February/019926.html [2] On x86 with the orc unwinder and stack validation turned off. objtool SEGFAULTs on s390... Philipp Rudo (11): kexec_file: Silence compile warnings kexec_file: Remove checks in kexec_purgatory_load kexec_file: Make purgatory_info->ehdr const kexec_file: Search symbols in read-only kexec_purgatory kexec_file: Use read-only sections in arch_kexec_apply_relocations* kexec_file: Split up __kexec_load_puragory kexec_file: Simplify kexec_purgatory_setup_sechdrs 1 kexec_file: Simplify kexec_purgatory_setup_sechdrs 2 kexec_file: Remove mis-use of sh_offset field kexec_file: Allow archs to set purgatory load address kexec_file: Move purgatories sha256 to common code arch/powerpc/kernel/kexec_elf_64.c | 9 +- arch/x86/kernel/kexec-bzimage64.c | 8 +- arch/x86/kernel/machine_kexec_64.c | 66 ++--- arch/x86/purgatory/Makefile | 3 + arch/x86/purgatory/purgatory.c | 2 +- include/linux/kexec.h | 38 +-- {arch/x86/purgatory => include/linux}/sha256.h | 10 +- kernel/kexec_file.c | 375 ++++++++++++------------- {arch/x86/purgatory => lib}/sha256.c | 4 +- 9 files changed, 244 insertions(+), 271 deletions(-) rename {arch/x86/purgatory => include/linux}/sha256.h (63%) rename {arch/x86/purgatory => lib}/sha256.c (99%) -- 2.13.5 -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
