From patchwork Mon Jan 25 16:57:23 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yury Norov X-Patchwork-Id: 8112961 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 9AF83BEEE5 for ; Mon, 25 Jan 2016 17:09:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 482D0202AE for ; Mon, 25 Jan 2016 17:09:46 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F1AB82026F for ; Mon, 25 Jan 2016 17:09:44 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1aNkcR-0004y0-H0; Mon, 25 Jan 2016 17:07:59 +0000 Received: from mail-bn1on0072.outbound.protection.outlook.com ([157.56.110.72] helo=na01-bn1-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1aNkTD-0002Rk-2e for linux-arm-kernel@lists.infradead.org; Mon, 25 Jan 2016 16:58:55 +0000 Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=Yuri.Norov@caviumnetworks.com; Received: from localhost (95.143.213.121) by BLUPR07MB612.namprd07.prod.outlook.com (10.141.207.27) with Microsoft SMTP Server (TLS) id 15.1.365.19; Mon, 25 Jan 2016 16:58:02 +0000 From: Yury Norov To: , , , , , , , Subject: [PATCH 1/5] all: s390: move wrapper infrastructure to generic headers Date: Mon, 25 Jan 2016 19:57:23 +0300 Message-ID: <1453741047-5498-2-git-send-email-ynorov@caviumnetworks.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1453741047-5498-1-git-send-email-ynorov@caviumnetworks.com> References: <1453741047-5498-1-git-send-email-ynorov@caviumnetworks.com> MIME-Version: 1.0 X-Originating-IP: [95.143.213.121] X-ClientProxiedBy: AM2PR02CA0013.eurprd02.prod.outlook.com (25.160.28.151) To BLUPR07MB612.namprd07.prod.outlook.com (10.141.207.27) X-Microsoft-Exchange-Diagnostics: 1; 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BLUPR07MB612; 5:nUVbd6VjC/ytyLxpZvM7dNINL0l63YCTLlasrcrbVrY6PIfzS1Dp22mZsCaonWs8E1VmZaGnN1DdeUyC3arUGrUbhUtuk33lNsTkiC/7fD5GJq2PlpchRwu6fZKu+rB1VuHKXvhPY8fbn4IxkQrqIg==; 24:jqpG/QFCI1XWEiT97gMZdmbwbJIvIruwrHHMNgK0IJjeD5NGs4eDNXM7amAhPMdAw3NifEnxOrzxmEwCDj4OFsH5dlc6xtLmGTtibEugp2k= SpamDiagnosticOutput: 1:23 SpamDiagnosticMetadata: NSPM X-OriginatorOrg: caviumnetworks.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Jan 2016 16:58:02.7729 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLUPR07MB612 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160125_085828_645940_71359446 X-CRM114-Status: GOOD ( 11.99 ) X-Spam-Score: -1.9 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pinskia@gmail.com, Prasun.Kapoor@caviumnetworks.com, Nathan_Lynch@mentor.com, agraf@suse.de, klimov.linux@gmail.com, broonie@kernel.org, Yury Norov , joseph@codesourcery.com, christoph.muellner@theobroma-systems.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAD_ENC_HEADER,BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP __SC_COMPAT_CAST for s390 is too specific due to 31-bit pointer length, so it's moved to arch/s390/include/asm/compat.h. Generic declaration assumes that long, unsigned long and pointer types are all 32-bit length. linux/syscalls_structs.h header is introduced, because from now (see next patch) structure types listed there are needed for both normal and compat mode. cond_syscall_wrapped now defined two symbols: sys_foo() and compat_sys_foo(), if compat wrappers are enabled. Here __SC_WRAP() macro is introduced as well. s390 doesn't need it as it uses asm-generated syscall table. But architectures that generate that tables with C code (ARM64/ILP32) should redefine it as '#define __SC_WRAP(name) compat_##name'. Signed-off-by: Yury Norov --- arch/s390/include/asm/compat.h | 17 +++++++++-- arch/s390/kernel/compat_wrapper.c | 51 ------------------------------- include/linux/compat.h | 63 +++++++++++++++++++++++++++++++++++++++ include/linux/syscalls.h | 57 +---------------------------------- include/linux/syscalls_structs.h | 60 +++++++++++++++++++++++++++++++++++++ include/uapi/asm-generic/unistd.h | 4 +++ kernel/sys_ni.c | 8 +++++ 7 files changed, 151 insertions(+), 109 deletions(-) create mode 100644 include/linux/syscalls_structs.h diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h index d350ed9..46cb4be 100644 --- a/arch/s390/include/asm/compat.h +++ b/arch/s390/include/asm/compat.h @@ -7,13 +7,26 @@ #include #include -#define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p(typeof(0?(t)0:0ULL), u64)) - #define __SC_DELOUSE(t,v) ({ \ BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \ (t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \ }) +#define __SC_COMPAT_CAST(t, a) \ +({ \ + long __ReS = a; \ + \ + BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) && \ + !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t)); \ + if (__TYPE_IS_L(t)) \ + __ReS = (s32)a; \ + if (__TYPE_IS_UL(t)) \ + __ReS = (u32)a; \ + if (__TYPE_IS_PTR(t)) \ + __ReS = a & 0x7fffffff; \ + (t)__ReS; \ +}) + #define PSW32_MASK_PER 0x40000000UL #define PSW32_MASK_DAT 0x04000000UL #define PSW32_MASK_IO 0x02000000UL diff --git a/arch/s390/kernel/compat_wrapper.c b/arch/s390/kernel/compat_wrapper.c index fac4eed..527f75d 100644 --- a/arch/s390/kernel/compat_wrapper.c +++ b/arch/s390/kernel/compat_wrapper.c @@ -8,57 +8,6 @@ #include #include "entry.h" -#define COMPAT_SYSCALL_WRAP1(name, ...) \ - COMPAT_SYSCALL_WRAPx(1, _##name, __VA_ARGS__) -#define COMPAT_SYSCALL_WRAP2(name, ...) \ - COMPAT_SYSCALL_WRAPx(2, _##name, __VA_ARGS__) -#define COMPAT_SYSCALL_WRAP3(name, ...) \ - COMPAT_SYSCALL_WRAPx(3, _##name, __VA_ARGS__) -#define COMPAT_SYSCALL_WRAP4(name, ...) \ - COMPAT_SYSCALL_WRAPx(4, _##name, __VA_ARGS__) -#define COMPAT_SYSCALL_WRAP5(name, ...) \ - COMPAT_SYSCALL_WRAPx(5, _##name, __VA_ARGS__) -#define COMPAT_SYSCALL_WRAP6(name, ...) \ - COMPAT_SYSCALL_WRAPx(6, _##name, __VA_ARGS__) - -#define __SC_COMPAT_TYPE(t, a) \ - __typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a - -#define __SC_COMPAT_CAST(t, a) \ -({ \ - long __ReS = a; \ - \ - BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) && \ - !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t)); \ - if (__TYPE_IS_L(t)) \ - __ReS = (s32)a; \ - if (__TYPE_IS_UL(t)) \ - __ReS = (u32)a; \ - if (__TYPE_IS_PTR(t)) \ - __ReS = a & 0x7fffffff; \ - (t)__ReS; \ -}) - -/* - * The COMPAT_SYSCALL_WRAP macro generates system call wrappers to be used by - * compat tasks. These wrappers will only be used for system calls where only - * the system call arguments need sign or zero extension or zeroing of the upper - * 33 bits of pointers. - * Note: since the wrapper function will afterwards call a system call which - * again performs zero and sign extension for all system call arguments with - * a size of less than eight bytes, these compat wrappers only touch those - * system call arguments with a size of eight bytes ((unsigned) long and - * pointers). Zero and sign extension for e.g. int parameters will be done by - * the regular system call wrappers. - */ -#define COMPAT_SYSCALL_WRAPx(x, name, ...) \ -asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ -asmlinkage long notrace compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__));\ -asmlinkage long notrace compat_sys##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__)) \ -{ \ - return sys##name(__MAP(x,__SC_COMPAT_CAST,__VA_ARGS__)); \ -} - COMPAT_SYSCALL_WRAP2(creat, const char __user *, pathname, umode_t, mode); COMPAT_SYSCALL_WRAP2(link, const char __user *, oldname, const char __user *, newname); COMPAT_SYSCALL_WRAP1(unlink, const char __user *, pathname); diff --git a/include/linux/compat.h b/include/linux/compat.h index a76c917..1a761ea 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -718,4 +718,67 @@ asmlinkage long compat_sys_fanotify_mark(int, unsigned int, __u32, __u32, #define is_compat_task() (0) #endif /* CONFIG_COMPAT */ + +#ifdef CONFIG_COMPAT_WRAPPER + +#ifndef __TYPE_IS_PTR +#define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p(typeof(0?(t)0:0ULL), u64)) +#endif + +#ifndef __SC_COMPAT_TYPE +#define __SC_COMPAT_TYPE(t, a) \ + __typeof(__builtin_choose_expr(sizeof(t) > 4, 0L, (t)0)) a +#endif + +#ifndef __SC_COMPAT_CAST +#define __SC_COMPAT_CAST(t, a) ({ \ + BUILD_BUG_ON((sizeof(t) > 4) && !__TYPE_IS_L(t) && \ + !__TYPE_IS_UL(t) && !__TYPE_IS_PTR(t)); \ + ((t) ((t)(-1) < 0 ? (s64)(s32)(a) : (u64)(u32)(a))); \ +}) +#endif + +#ifndef SYSCALL_DEFINE_WRAPx +/* + * The SYSCALL_DEFINE_WRAP macro generates system call wrappers to be used by + * compat tasks. These wrappers will only be used for system calls where only + * the system call arguments need sign or zero extension or zeroing of upper + * bits of pointers. + * Note: since the wrapper function will afterwards call a system call which + * again performs zero and sign extension for all system call arguments with + * a size of less than eight bytes, these compat wrappers only touch those + * system call arguments with a size of eight bytes ((unsigned) long and + * pointers). Zero and sign extension for e.g. int parameters will be done by + * the regular system call wrappers. + */ +#define SYSCALL_DEFINE_WRAPx(x, name, ...) \ +asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \ +asmlinkage long compat_sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)) \ + __attribute__((alias(__stringify(compat_SyS##name)))); \ +asmlinkage long compat_SyS##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__)); \ +asmlinkage long compat_SyS##name(__MAP(x,__SC_COMPAT_TYPE,__VA_ARGS__)) \ +{ \ + return sys##name(__MAP(x,__SC_COMPAT_CAST,__VA_ARGS__)); \ +} \ +SYSCALL_DEFINEx(x, name, __VA_ARGS__) +#endif + +#define SYSCALL_DEFINE_WRAP1(name, ...) SYSCALL_DEFINE_WRAPx(1, _##name, __VA_ARGS__) +#define SYSCALL_DEFINE_WRAP2(name, ...) SYSCALL_DEFINE_WRAPx(2, _##name, __VA_ARGS__) +#define SYSCALL_DEFINE_WRAP3(name, ...) SYSCALL_DEFINE_WRAPx(3, _##name, __VA_ARGS__) +#define SYSCALL_DEFINE_WRAP4(name, ...) SYSCALL_DEFINE_WRAPx(4, _##name, __VA_ARGS__) +#define SYSCALL_DEFINE_WRAP5(name, ...) SYSCALL_DEFINE_WRAPx(5, _##name, __VA_ARGS__) +#define SYSCALL_DEFINE_WRAP6(name, ...) SYSCALL_DEFINE_WRAPx(6, _##name, __VA_ARGS__) + +#else + +#define SYSCALL_DEFINE_WRAP1 SYSCALL_DEFINE1 +#define SYSCALL_DEFINE_WRAP2 SYSCALL_DEFINE2 +#define SYSCALL_DEFINE_WRAP3 SYSCALL_DEFINE3 +#define SYSCALL_DEFINE_WRAP4 SYSCALL_DEFINE4 +#define SYSCALL_DEFINE_WRAP5 SYSCALL_DEFINE5 +#define SYSCALL_DEFINE_WRAP6 SYSCALL_DEFINE6 + +#endif /* CONFIG_COMPAT_WRAPPER */ + #endif /* _LINUX_COMPAT_H */ diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h index c2b66a2..1942cf4 100644 --- a/include/linux/syscalls.h +++ b/include/linux/syscalls.h @@ -11,62 +11,7 @@ #ifndef _LINUX_SYSCALLS_H #define _LINUX_SYSCALLS_H -struct epoll_event; -struct iattr; -struct inode; -struct iocb; -struct io_event; -struct iovec; -struct itimerspec; -struct itimerval; -struct kexec_segment; -struct linux_dirent; -struct linux_dirent64; -struct list_head; -struct mmap_arg_struct; -struct msgbuf; -struct user_msghdr; -struct mmsghdr; -struct msqid_ds; -struct new_utsname; -struct nfsctl_arg; -struct __old_kernel_stat; -struct oldold_utsname; -struct old_utsname; -struct pollfd; -struct rlimit; -struct rlimit64; -struct rusage; -struct sched_param; -struct sched_attr; -struct sel_arg_struct; -struct semaphore; -struct sembuf; -struct shmid_ds; -struct sockaddr; -struct stat; -struct stat64; -struct statfs; -struct statfs64; -struct __sysctl_args; -struct sysinfo; -struct timespec; -struct timeval; -struct timex; -struct timezone; -struct tms; -struct utimbuf; -struct mq_attr; -struct compat_stat; -struct compat_timeval; -struct robust_list_head; -struct getcpu_cache; -struct old_linux_dirent; -struct perf_event_attr; -struct file_handle; -struct sigaltstack; -union bpf_attr; - +#include #include #include #include diff --git a/include/linux/syscalls_structs.h b/include/linux/syscalls_structs.h new file mode 100644 index 0000000..a920cbc --- /dev/null +++ b/include/linux/syscalls_structs.h @@ -0,0 +1,60 @@ +#ifndef _LINUX_SYSCALL_STRUCTS_H +#define _LINUX_SYSCALL_STRUCTS_H + +struct epoll_event; +struct iattr; +struct inode; +struct iocb; +struct io_event; +struct iovec; +struct itimerspec; +struct itimerval; +struct kexec_segment; +struct linux_dirent; +struct linux_dirent64; +struct list_head; +struct mmap_arg_struct; +struct msgbuf; +struct user_msghdr; +struct mmsghdr; +struct msqid_ds; +struct new_utsname; +struct nfsctl_arg; +struct __old_kernel_stat; +struct oldold_utsname; +struct old_utsname; +struct pollfd; +struct rlimit; +struct rlimit64; +struct rusage; +struct sched_param; +struct sched_attr; +struct sel_arg_struct; +struct semaphore; +struct sembuf; +struct shmid_ds; +struct sockaddr; +struct stat; +struct stat64; +struct statfs; +struct statfs64; +struct __sysctl_args; +struct sysinfo; +struct timespec; +struct timeval; +struct timex; +struct timezone; +struct tms; +struct utimbuf; +struct mq_attr; +struct compat_stat; +struct compat_timeval; +struct robust_list_head; +struct getcpu_cache; +struct old_linux_dirent; +struct perf_event_attr; +struct file_handle; +struct sigaltstack; +union bpf_attr; + +#endif /* _LINUX_SYSCALL_STRUCTS_H */ diff --git a/include/uapi/asm-generic/unistd.h b/include/uapi/asm-generic/unistd.h index 1324b02..a8380ad 100644 --- a/include/uapi/asm-generic/unistd.h +++ b/include/uapi/asm-generic/unistd.h @@ -29,6 +29,10 @@ #define __SC_COMP_3264(_nr, _32, _64, _comp) __SC_3264(_nr, _32, _64) #endif +#ifndef __SC_WRAP +#define __SC_WRAP __SYSCALL +#endif + #define __NR_io_setup 0 __SC_COMP(__NR_io_setup, sys_io_setup, compat_sys_io_setup) #define __NR_io_destroy 1 diff --git a/kernel/sys_ni.c b/kernel/sys_ni.c index 0623787..8c99a45 100644 --- a/kernel/sys_ni.c +++ b/kernel/sys_ni.c @@ -16,6 +16,14 @@ asmlinkage long sys_ni_syscall(void) return -ENOSYS; } +#ifdef CONFIG_COMPAT_WRAPPER +#define cond_syscall_wrapped(name) \ + cond_syscall(name); \ + cond_syscall(compat_##name); +#else +#define cond_syscall_wrapped cond_syscall +#endif + cond_syscall(sys_quotactl); cond_syscall(sys32_quotactl); cond_syscall(sys_acct);