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Tue, 17 Nov 2015 21:23:28 +0000 Received: from mail-bn1bon0066.outbound.protection.outlook.com ([157.56.111.66] helo=na01-bn1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zyngq-00018N-Ug for linux-arm-kernel@lists.infradead.org; Tue, 17 Nov 2015 21:21:45 +0000 Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=Yuri.Norov@caviumnetworks.com; Received: from localhost (95.143.213.120) by BY2PR07MB616.namprd07.prod.outlook.com (10.141.222.156) with Microsoft SMTP Server (TLS) id 15.1.318.15; Tue, 17 Nov 2015 21:21:01 +0000 From: Yury Norov To: , , , Subject: [PATCH v6 14/19] arm64:ilp32: add sys_ilp32.c and a separate table (in entry.S) to use it Date: Wed, 18 Nov 2015 00:16:54 +0300 Message-ID: <1447795019-30176-15-git-send-email-ynorov@caviumnetworks.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1447795019-30176-1-git-send-email-ynorov@caviumnetworks.com> References: <1447795019-30176-1-git-send-email-ynorov@caviumnetworks.com> MIME-Version: 1.0 X-Originating-IP: [95.143.213.120] X-ClientProxiedBy: AM3PR01CA021.eurprd01.prod.exchangelabs.com (10.141.191.11) To BY2PR07MB616.namprd07.prod.outlook.com (10.141.222.156) X-Microsoft-Exchange-Diagnostics: 1; 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Reviewed-by: David Daney Signed-off-by: Philipp Tomsich Signed-off-by: Christoph Muellner Signed-off-by: Yury Norov Signed-off-by: Andrew Pinski --- arch/arm64/include/asm/unistd.h | 7 ++- arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/entry.S | 12 +++- arch/arm64/kernel/sys_ilp32.c | 118 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 136 insertions(+), 2 deletions(-) create mode 100644 arch/arm64/kernel/sys_ilp32.c diff --git a/arch/arm64/include/asm/unistd.h b/arch/arm64/include/asm/unistd.h index 4c2cbbc..696e638 100644 --- a/arch/arm64/include/asm/unistd.h +++ b/arch/arm64/include/asm/unistd.h @@ -13,13 +13,16 @@ * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ +#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 -#define __ARCH_WANT_SYS_LLSEEK #define __ARCH_WANT_SYS_NICE #define __ARCH_WANT_SYS_SIGPENDING #define __ARCH_WANT_SYS_SIGPROCMASK @@ -39,6 +42,8 @@ #define __NR_compat_sigreturn 119 #define __NR_compat_rt_sigreturn 173 +#define __ARCH_WANT_SYS_LLSEEK + /* * The following SVCs are ARM private. */ diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index 35a59af..837d730 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -24,6 +24,7 @@ arm64-obj-$(CONFIG_AARCH32_EL0) += sys32.o kuser32.o signal32.o \ sys_compat.o entry32.o \ ../../arm/kernel/opcodes.o arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o +arm64-obj-$(CONFIG_ARM64_ILP32) += sys_ilp32.o arm64-obj-$(CONFIG_COMPAT) += entry32-common.o arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o arm64-obj-$(CONFIG_PERF_EVENTS) += perf_regs.o perf_callchain.o diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 52be5c8..bcd921a 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -664,9 +664,13 @@ ENDPROC(ret_from_fork) */ .align 6 el0_svc: - adrp stbl, sys_call_table // load syscall table pointer uxtw scno, w8 // syscall number in w8 mov sc_nr, #__NR_syscalls +#ifdef CONFIG_ARM64_ILP32 + ldr x16, [tsk, #TI_FLAGS] + tbnz x16, #TIF_32BIT_AARCH64, el0_ilp32_svc // We are using ILP32 +#endif + adrp stbl, sys_call_table // load syscall table pointer el0_svc_naked: // compat entry point stp x0, scno, [sp, #S_ORIG_X0] // save the original x0 and syscall number enable_dbg_and_irq @@ -686,6 +690,12 @@ ni_sys: b ret_fast_syscall ENDPROC(el0_svc) +#ifdef CONFIG_ARM64_ILP32 +el0_ilp32_svc: + adrp stbl, sys_call_ilp32_table // load syscall table pointer + b el0_svc_naked +#endif + /* * This is the really slow path. We're going to be doing context * switches, and waiting for our parent to respond. diff --git a/arch/arm64/kernel/sys_ilp32.c b/arch/arm64/kernel/sys_ilp32.c new file mode 100644 index 0000000..c366d92 --- /dev/null +++ b/arch/arm64/kernel/sys_ilp32.c @@ -0,0 +1,118 @@ +/* + * AArch64- ILP32 specific system calls implementation + * + * Copyright (C) 2015 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 . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * Wrappers to pass the pt_regs argument. + */ +asmlinkage long sys_rt_sigreturn_wrapper(void); +#define compat_sys_rt_sigreturn sys_rt_sigreturn_wrapper + +/* 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_pread64 sys_pread64 +#define compat_sys_pwrite64 sys_pwrite64 +#define compat_sys_readahead sys_readahead +#define compat_sys_rt_sigaction sys_rt_sigaction +#define compat_sys_shmat sys_shmat +#define compat_sys_sync_file_range sys_sync_file_range +#define compat_sys_truncate64 sys_truncate +#define compat_sys_sigaltstack sys_sigaltstack + +#define compat_sys_io_getevents sys_io_getevents +#define compat_sys_lookup_dcookie sys_lookup_dcookie +#define compat_sys_epoll_pwait sys_epoll_pwait +#define compat_sys_fcntl64 compat_sys_fcntl +#define compat_sys_preadv compat_sys_preadv64 +#define compat_sys_signalfd4 sys_signalfd4 + +#define compat_sys_rt_sigsuspend sys_rt_sigsuspend +#define compat_sys_rt_sigprocmask sys_rt_sigprocmask +#define compat_sys_rt_sigpending sys_rt_sigpending +#define compat_sys_rt_sigqueueinfo sys_rt_sigqueueinfo +#define compat_sys_semtimedop sys_semtimedop +#define compat_sys_rt_tgsigqueueinfo sys_rt_tgsigqueueinfo + +#define compat_sys_timer_create sys_timer_create +#define compat_sys_timer_gettime sys_timer_gettime +#define compat_sys_timer_settime sys_timer_settime +#define compat_sys_rt_sigtimedwait sys_rt_sigtimedwait + +#define compat_sys_mq_open sys_mq_open +#define compat_sys_mq_timedsend sys_mq_timedsend +#define compat_sys_mq_timedreceive sys_mq_timedreceive +#define compat_sys_mq_getsetattr sys_mq_getsetattr +#define compat_sys_mq_open sys_mq_open + +#define compat_sys_open_by_handle_at sys_open_by_handle_at +#define compat_sys_clock_adjtime sys_clock_adjtime + +#define compat_sys_openat sys_openat +#define compat_sys_getdents64 sys_getdents64 +#define compat_sys_waitid sys_waitid +#define compat_sys_timer_settime sys_timer_settime +#define compat_sys_sched_rr_get_interval sys_sched_rr_get_interval +#define compat_sys_execveat sys_execveat + +#define compat_sys_mq_notify sys_mq_notify +#define compat_sys_clock_nanosleep sys_clock_nanosleep +#define compat_sys_clock_getres sys_clock_getres + +#define sys_lseek sys_llseek + +asmlinkage long compat_sys_mmap2_wrapper(void); +#define sys_mmap2 compat_sys_mmap2_wrapper + +asmlinkage long compat_sys_fstatfs64_wrapper(void); +#define compat_sys_fstatfs64 compat_sys_fstatfs64_wrapper +asmlinkage long compat_sys_statfs64_wrapper(void); +#define compat_sys_statfs64 compat_sys_statfs64_wrapper + +#define compat_sys_pwritev compat_sys_pwritev64 + +#include + +#undef __SYSCALL +#undef __SC_COMP +#undef __SC_3264 +#undef __SC_COMP_3264 + +#define __SYSCALL_COMPAT +#define __SYSCALL(nr, sym) [nr] = 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 +};