#ifndef __ASM_GENERIC_MODULE_H #define __ASM_GENERIC_MODULE_H /* * Many architectures just need a simple module * loader without arch specific data. */ #ifndef CONFIG_HAVE_MOD_ARCH_SPECIFIC struct mod_arch_specific { }; #endif #ifdef CONFIG_64BIT #define Elf_Shdr Elf64_Shdr #define Elf_Phdr Elf64_Phdr #define Elf_Sym Elf64_Sym #define Elf_Dyn Elf64_Dyn #define Elf_Ehdr Elf64_Ehdr #define Elf_Addr Elf64_Addr #ifdef CONFIG_MODULES_USE_ELF_REL #define Elf_Rel Elf64_Rel #endif #ifdef CONFIG_MODULES_USE_ELF_RELA #define Elf_Rela Elf64_Rela #endif #define ELF_R_TYPE(X) ELF64_R_TYPE(X) #define ELF_R_SYM(X) ELF64_R_SYM(X) #else /* CONFIG_64BIT */ #define Elf_Shdr Elf32_Shdr #define Elf_Phdr Elf32_Phdr #define Elf_Sym Elf32_Sym #define Elf_Dyn Elf32_Dyn #define Elf_Ehdr Elf32_Ehdr #define Elf_Addr Elf32_Addr #ifdef CONFIG_MODULES_USE_ELF_REL #define Elf_Rel Elf32_Rel #endif #ifdef CONFIG_MODULES_USE_ELF_RELA #define Elf_Rela Elf32_Rela #endif #define ELF_R_TYPE(X) ELF32_R_TYPE(X) #define ELF_R_SYM(X) ELF32_R_SYM(X) #endif #endif /* __ASM_GENERIC_MODULE_H */ p net-next plumbingsTobias Klauser
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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /net/rxrpc/conn_client.c
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/rxrpc/conn_client.c')