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c=relaxed/relaxed; d=CAVIUMNETWORKS.onmicrosoft.com; s=selector1-caviumnetworks-com; h=From:To:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=rnLOqzIiRzF6flfnqSDOD8zYxsLs2fuCuV0lq8xiO/Q=; b=dPA2F0q+av+oKN7nxfBHcqucHkPUGjbIegjWcJy+Ij+86jYRsVucSoIzATOmJuWtnTAQjGuztx7LYBV7DE6vOwHo6zD5OnMZgzj5BTcxJaTeYHOklxJoZKldaKOyn2vDWJvz0ZrktS7eeeaqkaPegITHQnBc5by+wMTHxJsoDEQ= Authentication-Results: arndb.de; dkim=none (message not signed) header.d=none;arndb.de; dmarc=none action=none header.from=caviumnetworks.com; Received: from localhost (50.233.148.158) by CY1PR07MB2230.namprd07.prod.outlook.com (10.164.112.144) with Microsoft SMTP Server (TLS) id 15.1.497.12; Tue, 24 May 2016 00:06:12 +0000 From: Yury Norov To: , , , , , , , CC: , , , , , , , , , , , , , , , , Andrew Pinski , Andrew Pinski Subject: [PATCH 18/23] arm64: ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it Date: Tue, 24 May 2016 03:04:47 +0300 Message-ID: <1464048292-30136-19-git-send-email-ynorov@caviumnetworks.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1464048292-30136-1-git-send-email-ynorov@caviumnetworks.com> References: <1464048292-30136-1-git-send-email-ynorov@caviumnetworks.com> MIME-Version: 1.0 X-Originating-IP: [50.233.148.158] X-ClientProxiedBy: CY1PR1201CA0040.namprd12.prod.outlook.com (10.169.17.178) To CY1PR07MB2230.namprd07.prod.outlook.com (10.164.112.144) X-MS-Office365-Filtering-Correlation-Id: 6f5fc97b-9791-41af-a676-08d3836737ca X-Microsoft-Exchange-Diagnostics: 1; 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Signed-off-by: Andrew Pinski Signed-off-by: Yury Norov --- arch/arm64/include/asm/unistd.h | 11 +++++- arch/arm64/kernel/Makefile | 2 +- arch/arm64/kernel/entry.S | 10 ++++- arch/arm64/kernel/sys_ilp32.c | 83 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 102 insertions(+), 4 deletions(-) create mode 100644 arch/arm64/kernel/sys_ilp32.c -- 2.5.0 diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h index 2971dea..5ea18ef 100644 --- a/arch/arm64/include/asm/unistd.h +++ b/arch/arm64/include/asm/unistd.h @@ -13,9 +13,18 @@ * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ + +#ifdef CONFIG_COMPAT +#define __ARCH_WANT_COMPAT_STAT64 +#endif + +#ifdef CONFIG_ARM64_ILP32 +#define __ARCH_WANT_COMPAT_SYS_PREADV64 +#define __ARCH_WANT_COMPAT_SYS_PWRITEV64 +#endif + #ifdef CONFIG_AARCH32_EL0 #define __ARCH_WANT_COMPAT_SYS_GETDENTS64 -#define __ARCH_WANT_COMPAT_STAT64 #define __ARCH_WANT_SYS_GETHOSTNAME #define __ARCH_WANT_SYS_PAUSE #define __ARCH_WANT_SYS_GETPGRP diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index 9dfdf86..7aa65ea 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -28,7 +28,7 @@ $(obj)/%.stub.o: $(obj)/%.o FORCE arm64-obj-$(CONFIG_AARCH32_EL0) += sys32.o kuser32.o signal32.o \ sys_compat.o entry32.o \ ../../arm/kernel/opcodes.o binfmt_elf32.o -arm64-obj-$(CONFIG_ARM64_ILP32) += binfmt_ilp32.o +arm64-obj-$(CONFIG_ARM64_ILP32) += binfmt_ilp32.o sys_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/entry.S b/arch/arm64/kernel/entry.S index 21a0624..acea2cb 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -501,6 +501,7 @@ el0_svc_compat: * AArch32 syscall handling */ adrp stbl, compat_sys_call_table // load compat syscall table pointer + ldr x16, [tsk, #TI_FLAGS] uxtw scno, w7 // syscall number in w7 (r7) mov sc_nr, #__NR_compat_syscalls b el0_svc_naked @@ -717,15 +718,20 @@ ENDPROC(ret_from_fork) .align 6 el0_svc: adrp stbl, sys_call_table // load syscall table pointer + ldr x16, [tsk, #TI_FLAGS] uxtw scno, w8 // syscall number in w8 mov sc_nr, #__NR_syscalls +#ifdef CONFIG_ARM64_ILP32 + adrp x17, sys_call_ilp32_table // load ilp32 syscall table pointer + tst x16, #_TIF_32BIT_AARCH64 + csel stbl, stbl, x17, eq // We are using ILP32 +#endif el0_svc_naked: // compat entry point stp x0, scno, [sp, #S_ORIG_X0] // save the original x0 and syscall number enable_dbg_and_irq ct_user_exit 1 - ldr x16, [tsk, #TI_FLAGS] // check for syscall hooks - tst x16, #_TIF_SYSCALL_WORK + tst x16, #_TIF_SYSCALL_WORK // check for syscall hooks b.ne __sys_trace cmp scno, sc_nr // check upper syscall limit b.hs ni_sys diff --git a/arch/arm64/kernel/sys_ilp32.c b/arch/arm64/kernel/sys_ilp32.c new file mode 100644 index 0000000..d4cd2a9 --- /dev/null +++ b/arch/arm64/kernel/sys_ilp32.c @@ -0,0 +1,83 @@ +/* + * AArch64- ILP32 specific system calls implementation + * + * Copyright (C) 2016 Cavium Inc. + * Author: Andrew Pinski + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#define __SYSCALL_COMPAT + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Using non-compat syscalls where necessary */ +#define compat_sys_fadvise64_64 sys_fadvise64_64 +#define compat_sys_fallocate sys_fallocate +#define compat_sys_ftruncate64 sys_ftruncate +#define compat_sys_lookup_dcookie sys_lookup_dcookie +#define compat_sys_readahead sys_readahead +#define compat_sys_shmat sys_shmat +#define compat_sys_sync_file_range sys_sync_file_range +#define compat_sys_truncate64 sys_truncate +#define sys_llseek sys_lseek +#define sys_mmap2 compat_sys_mmap2 + +static unsigned long compat_sys_mmap2(compat_uptr_t addr, compat_size_t len, + int prot, int flags, int fd, off_t pgoff) +{ + if (pgoff & (~PAGE_MASK >> 12)) + return -EINVAL; + + return sys_mmap_pgoff(addr, len, prot, flags, fd, + pgoff >> (PAGE_SHIFT - 12)); +} + +static unsigned long compat_sys_pread64(unsigned int fd, + compat_uptr_t __user *ubuf, compat_size_t count, off_t offset) +{ + return sys_pread64(fd, (char *) ubuf, count, offset); +} + +static unsigned long compat_sys_pwrite64(unsigned int fd, + compat_uptr_t __user *ubuf, compat_size_t count, off_t offset) +{ + return sys_pwrite64(fd, (char *) ubuf, count, offset); +} + +#include + +#undef __SYSCALL +#undef __SC_WRAP + +#define __SYSCALL(nr, sym) [nr] = sym, +#define __SC_WRAP(nr, sym) [nr] = compat_##sym, + +/* + * The sys_call_ilp32_table array must be 4K aligned to be accessible from + * kernel/entry.S. + */ +void *sys_call_ilp32_table[__NR_syscalls] __aligned(4096) = { + [0 ... __NR_syscalls - 1] = sys_ni_syscall, +#include +};