diff --git a/arch/Kconfig b/arch/Kconfig index 4f55c736be1..b37f8f3ffa5 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -199,4 +199,7 @@ config HAVE_CMPXCHG_LOCAL config HAVE_CMPXCHG_DOUBLE bool +config ARCH_WANT_OLD_COMPAT_IPC + bool + source "kernel/gcov/Kconfig" diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 5ab6e89603c..4bbbb40f352 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2456,6 +2456,7 @@ config MIPS32_COMPAT config COMPAT bool depends on MIPS32_COMPAT + select ARCH_WANT_OLD_COMPAT_IPC default y config SYSVIPC_COMPAT diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 1919634a9b3..48ab0bb3892 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -152,6 +152,7 @@ config COMPAT bool default y if PPC64 select COMPAT_BINFMT_ELF + select ARCH_WANT_OLD_COMPAT_IPC config SYSVIPC_COMPAT bool diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 6d99a5fcc09..0ff53e35009 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -218,6 +218,7 @@ config COMPAT prompt "Kernel support for 31 bit emulation" depends on 64BIT select COMPAT_BINFMT_ELF + select ARCH_WANT_OLD_COMPAT_IPC help Select this option if you want to enable your system kernel to handle system-calls from ELF binaries for 31 bit ESA. This option diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index ca5580e4d81..64e1a8e7cab 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -576,6 +576,7 @@ config COMPAT depends on SPARC64 default y select COMPAT_BINFMT_ELF + select ARCH_WANT_OLD_COMPAT_IPC config SYSVIPC_COMPAT bool diff --git a/arch/tile/include/asm/compat.h b/arch/tile/include/asm/compat.h index bf95f55b82b..4b4b28969a6 100644 --- a/arch/tile/include/asm/compat.h +++ b/arch/tile/include/asm/compat.h @@ -242,17 +242,6 @@ long compat_sys_fallocate(int fd, int mode, long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval); -/* Versions of compat functions that differ from generic Linux. */ -struct compat_msgbuf; -long tile_compat_sys_msgsnd(int msqid, - struct compat_msgbuf __user *msgp, - size_t msgsz, int msgflg); -long tile_compat_sys_msgrcv(int msqid, - struct compat_msgbuf __user *msgp, - size_t msgsz, long msgtyp, int msgflg); -long tile_compat_sys_ptrace(compat_long_t request, compat_long_t pid, - compat_long_t addr, compat_long_t data); - /* Tilera Linux syscalls that don't have "compat" versions. */ #define compat_sys_flush_cache sys_flush_cache diff --git a/arch/tile/kernel/compat.c b/arch/tile/kernel/compat.c index bf5e9d70266..d67459b9ac2 100644 --- a/arch/tile/kernel/compat.c +++ b/arch/tile/kernel/compat.c @@ -16,7 +16,6 @@ #define __SYSCALL_COMPAT #include -#include #include #include #include @@ -95,52 +94,10 @@ long compat_sys_sched_rr_get_interval(compat_pid_t pid, return ret; } -/* - * The usual compat_sys_msgsnd() and _msgrcv() seem to be assuming - * some different calling convention than our normal 32-bit tile code. - */ - -/* Already defined in ipc/compat.c, but we need it here. */ -struct compat_msgbuf { - compat_long_t mtype; - char mtext[1]; -}; - -long tile_compat_sys_msgsnd(int msqid, - struct compat_msgbuf __user *msgp, - size_t msgsz, int msgflg) -{ - compat_long_t mtype; - - if (get_user(mtype, &msgp->mtype)) - return -EFAULT; - return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg); -} - -long tile_compat_sys_msgrcv(int msqid, - struct compat_msgbuf __user *msgp, - size_t msgsz, long msgtyp, int msgflg) -{ - long err, mtype; - - err = do_msgrcv(msqid, &mtype, msgp->mtext, msgsz, msgtyp, msgflg); - if (err < 0) - goto out; - - if (put_user(mtype, &msgp->mtype)) - err = -EFAULT; - out: - return err; -} - /* Provide the compat syscall number to call mapping. */ #undef __SYSCALL #define __SYSCALL(nr, call) [nr] = (call), -/* The generic versions of these don't work for Tile. */ -#define compat_sys_msgrcv tile_compat_sys_msgrcv -#define compat_sys_msgsnd tile_compat_sys_msgsnd - /* See comments in sys.c */ #define compat_sys_fadvise64_64 sys32_fadvise64_64 #define compat_sys_readahead sys32_readahead diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 5bed94e189f..cde163dc605 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2178,6 +2178,7 @@ config IA32_AOUT config COMPAT def_bool y depends on IA32_EMULATION + select ARCH_WANT_OLD_COMPAT_IPC config COMPAT_FOR_U64_ALIGNMENT def_bool COMPAT diff --git a/include/linux/compat.h b/include/linux/compat.h index 7e05fcee75a..35c2dbf2448 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -224,6 +224,7 @@ struct compat_sysinfo; struct compat_sysctl_args; struct compat_kexec_segment; struct compat_mq_attr; +struct compat_msgbuf; extern void compat_exit_robust_list(struct task_struct *curr); @@ -234,13 +235,22 @@ asmlinkage long compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr, compat_size_t __user *len_ptr); +#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC long compat_sys_semctl(int first, int second, int third, void __user *uptr); long compat_sys_msgsnd(int first, int second, int third, void __user *uptr); long compat_sys_msgrcv(int first, int second, int msgtyp, int third, int version, void __user *uptr); -long compat_sys_msgctl(int first, int second, void __user *uptr); long compat_sys_shmat(int first, int second, compat_uptr_t third, int version, void __user *uptr); +#else +long compat_sys_semctl(int semid, int semnum, int cmd, int arg); +long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp, + size_t msgsz, int msgflg); +long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp, + size_t msgsz, long msgtyp, int msgflg); +long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg); +#endif +long compat_sys_msgctl(int first, int second, void __user *uptr); long compat_sys_shmctl(int first, int second, void __user *uptr); long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, unsigned nsems, const struct compat_timespec __user *timeout); diff --git a/ipc/compat.c b/ipc/compat.c index 845a28738d3..a6df704f521 100644 --- a/ipc/compat.c +++ b/ipc/compat.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include @@ -117,6 +118,7 @@ extern int sem_ctls[]; static inline int compat_ipc_parse_version(int *cmd) { +#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC int version = *cmd & IPC_64; /* this is tricky: architectures that have support for the old @@ -128,6 +130,10 @@ static inline int compat_ipc_parse_version(int *cmd) *cmd &= ~IPC_64; #endif return version; +#else + /* With the asm-generic APIs, we always use the 64-bit versions. */ + return IPC_64; +#endif } static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64, @@ -232,10 +238,9 @@ static inline int put_compat_semid_ds(struct semid64_ds *s, return err; } -long compat_sys_semctl(int first, int second, int third, void __user *uptr) +static long do_compat_semctl(int first, int second, int third, u32 pad) { union semun fourth; - u32 pad; int err, err2; struct semid64_ds s64; struct semid64_ds __user *up64; @@ -243,10 +248,6 @@ long compat_sys_semctl(int first, int second, int third, void __user *uptr) memset(&s64, 0, sizeof(s64)); - if (!uptr) - return -EINVAL; - if (get_user(pad, (u32 __user *) uptr)) - return -EFAULT; if ((third & (~IPC_64)) == SETVAL) fourth.val = (int) pad; else @@ -305,6 +306,18 @@ long compat_sys_semctl(int first, int second, int third, void __user *uptr) return err; } +#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC +long compat_sys_semctl(int first, int second, int third, void __user *uptr) +{ + u32 pad; + + if (!uptr) + return -EINVAL; + if (get_user(pad, (u32 __user *) uptr)) + return -EFAULT; + return do_compat_semctl(first, second, third, pad); +} + long compat_sys_msgsnd(int first, int second, int third, void __user *uptr) { struct compat_msgbuf __user *up = uptr; @@ -353,6 +366,37 @@ long compat_sys_msgrcv(int first, int second, int msgtyp, int third, out: return err; } +#else +long compat_sys_semctl(int semid, int semnum, int cmd, int arg) +{ + return do_compat_semctl(semid, semnum, cmd, arg); +} + +long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp, + size_t msgsz, int msgflg) +{ + compat_long_t mtype; + + if (get_user(mtype, &msgp->mtype)) + return -EFAULT; + return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg); +} + +long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp, + size_t msgsz, long msgtyp, int msgflg) +{ + long err, mtype; + + err = do_msgrcv(msqid, &mtype, msgp->mtext, msgsz, msgtyp, msgflg); + if (err < 0) + goto out; + + if (put_user(mtype, &msgp->mtype)) + err = -EFAULT; + out: + return err; +} +#endif static inline int get_compat_msqid64(struct msqid64_ds *m64, struct compat_msqid64_ds __user *up64) @@ -470,6 +514,7 @@ long compat_sys_msgctl(int first, int second, void __user *uptr) return err; } +#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC long compat_sys_shmat(int first, int second, compat_uptr_t third, int version, void __user *uptr) { @@ -485,6 +530,19 @@ long compat_sys_shmat(int first, int second, compat_uptr_t third, int version, uaddr = compat_ptr(third); return put_user(raddr, uaddr); } +#else +long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg) +{ + unsigned long ret; + long err; + + err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret); + if (err) + return err; + force_successful_syscall_return(); + return (long)ret; +} +#endif static inline int get_compat_shmid64_ds(struct shmid64_ds *s64, struct compat_shmid64_ds __user *up64)