Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935716AbcJUUfX (ORCPT ); Fri, 21 Oct 2016 16:35:23 -0400 Received: from mail-cys01nam02on0053.outbound.protection.outlook.com ([104.47.37.53]:26688 "EHLO NAM02-CY1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932609AbcJUUfU (ORCPT ); Fri, 21 Oct 2016 16:35:20 -0400 Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=Yuri.Norov@caviumnetworks.com; From: Yury Norov To: , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , Bamvor Zhang Jian Subject: [PATCH 10/18] arm64: ilp32: introduce binfmt_ilp32.c Date: Fri, 21 Oct 2016 23:33:09 +0300 Message-ID: <1477081997-4770-11-git-send-email-ynorov@caviumnetworks.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1477081997-4770-1-git-send-email-ynorov@caviumnetworks.com> References: <1477081997-4770-1-git-send-email-ynorov@caviumnetworks.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [95.143.213.121] X-ClientProxiedBy: HE1PR02CA0067.eurprd02.prod.outlook.com (10.163.170.35) To CY1PR07MB2247.namprd07.prod.outlook.com (10.164.112.149) X-MS-Office365-Filtering-Correlation-Id: 76e6f6c6-88a5-480d-196f-08d3f9f1c46e X-Microsoft-Exchange-Diagnostics: 1;CY1PR07MB2247;2:6i1TB+EN5izZIJaqeLV7L3+7eK8KLKfgf29GgE4+k7zCZhTthtiwCQ1fH98LdpnjQuoi1zJXO457KT9Ya3q41tF9981cwT6lP9aBDNi+joSpwBSqc/kFTDkbHOhX+mVwrerYxBAQpGppQXMU7z1fiEBYQGdQsURf3PADCAwIH9qeSBPU614Ez4lqvAWo1Dhe77GCR4u4tlV5fhlJhEhhFQ==;3:ve3+Y2zMI3UfopEVf+gJLBNfH78DyxvMnFDtaJMTcS6R3EfX6ZQSMZLipn6gfu9kQ3+AqvAW8ZtVUadbcdQDPWcLAYPRjjKnZASBGcfxuMO1AxF+5oTaMSHSdm7yulQMqm/KbPgKP6rO/CTR1Hh7kw==;25:FDFsG7Tg8RE9+OdLEEdXTimlqF6mqFiTXzj6FkedwtT2kc/Pb8EHvEOyl3e5btV9Ix/GzVJ0WV2MGVn0yMXSjqlV5bAWw1eBKtx4/WE/oKmJ2ujuoQ+/YPysIzZJrzhm7IZ5sy1H1FwHF8fMjp16KHmZaEv8bkt67jJ22XwtQdXPO1b3CH7PjSgFOfacD6iASv6Y30K+P5UWg62ZiM7pfPqo17ObEtFn+0xoiizcjp7+hX5ap8fcxJKcnmy2RpSBMNa1lhg3km4n38BcbrDUhPHcKuj8u8Y1JZuSPVBrwPMFtuKKBmhjcZ7hR+DCnrE3RmptPTe7rhmu05//B9Eg/6aFHw5X5mIM/e5It673xqzGwNeJNAJco5INr/5bovjEEJ7SIqDWEK1YYOflJaGZQAuE//O+1IeaY/X6m8YnRlzg+Ck0G3Xkd8BEK7iwOS+2 X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:CY1PR07MB2247; 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typedef compat_elf_greg_t compat_elf_gregset_t[COMPAT_ELF_NGREG]; +#else /* AArch64 registers for AARCH64/ILP32 */ +#define COMPAT_ELF_NGREG ELF_NGREG +#define compat_elf_greg_t elf_greg_t +#define compat_elf_gregset_t elf_gregset_t +#endif /* AArch32 EABI. */ #define EF_ARM_EABI_MASK 0xff000000 diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index abe5040..f661888 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -29,6 +29,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE arm64-obj-$(CONFIG_AARCH32_EL0) += sys32.o kuser32.o signal32.o \ sys_compat.o entry32.o binfmt_elf32.o +arm64-obj-$(CONFIG_ARM64_ILP32) += binfmt_ilp32.o arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o arm64-obj-$(CONFIG_ARM64_MODULE_PLTS) += module-plts.o diff --git a/arch/arm64/kernel/binfmt_ilp32.c b/arch/arm64/kernel/binfmt_ilp32.c new file mode 100644 index 0000000..759066e --- /dev/null +++ b/arch/arm64/kernel/binfmt_ilp32.c @@ -0,0 +1,97 @@ +/* + * Support for ILP32 Linux/aarch64 ELF binaries. + */ +#define USE_AARCH64_GREG + +#include +#include + +#undef ELF_CLASS +#define ELF_CLASS ELFCLASS32 + +#undef elfhdr +#undef elf_phdr +#undef elf_shdr +#undef elf_note +#undef elf_addr_t +#define elfhdr elf32_hdr +#define elf_phdr elf32_phdr +#define elf_shdr elf32_shdr +#define elf_note elf32_note +#define elf_addr_t Elf32_Addr + +/* + * Some data types as stored in coredump. + */ +#define user_long_t compat_long_t +#define user_siginfo_t compat_siginfo_t +#define copy_siginfo_to_user copy_siginfo_to_user32 + +/* + * The machine-dependent core note format types are defined in elfcore-compat.h, + * which requires asm/elf.h to define compat_elf_gregset_t et al. + */ +#define elf_prstatus compat_elf_prstatus +#define elf_prpsinfo compat_elf_prpsinfo + +/* + * Compat version of cputime_to_compat_timeval, perhaps this + * should be an inline in . + */ +static void cputime_to_compat_timeval(const cputime_t cputime, + struct compat_timeval *value) +{ + struct timeval tv; + + cputime_to_timeval(cputime, &tv); + value->tv_sec = tv.tv_sec; + value->tv_usec = tv.tv_usec; +} + +#undef cputime_to_timeval +#define cputime_to_timeval cputime_to_compat_timeval + +/* AARCH64 ILP32 EABI. */ +#undef elf_check_arch +#define elf_check_arch(x) (((x)->e_machine == EM_AARCH64) \ + && (x)->e_ident[EI_CLASS] == ELFCLASS32) + +#undef SET_PERSONALITY +#define SET_PERSONALITY(ex) \ +do { \ + set_thread_flag(TIF_32BIT_AARCH64); \ + clear_thread_flag(TIF_32BIT); \ +} while (0) + +#undef ARCH_DLINFO +#define ARCH_DLINFO \ +do { \ + NEW_AUX_ENT(AT_SYSINFO_EHDR, \ + (elf_addr_t)(long)current->mm->context.vdso); \ +} while (0) + +#undef ELF_PLATFORM +#ifdef __AARCH64EB__ +#define ELF_PLATFORM ("aarch64_be:ilp32") +#else +#define ELF_PLATFORM ("aarch64:ilp32") +#endif + +#undef ELF_ET_DYN_BASE +#define ELF_ET_DYN_BASE COMPAT_ELF_ET_DYN_BASE + +#undef ELF_HWCAP +#undef ELF_HWCAP2 +#define ELF_HWCAP ((u32) elf_hwcap) +#define ELF_HWCAP2 ((u32) (elf_hwcap >> 32)) + +/* + * Rename a few of the symbols that binfmt_elf.c will define. + * These are all local so the names don't really matter, but it + * might make some debugging less confusing not to duplicate them. + */ +#define elf_format compat_elf_format +#define init_elf_binfmt init_compat_elf_binfmt +#define exit_elf_binfmt exit_compat_elf_binfmt + +#include "../../../fs/binfmt_elf.c" -- 2.7.4