/* * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls. * * Copyright (C) 2001 IBM * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) * * These routines maintain argument size conversion between 32bit and 64bit * environment. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/kernel.h> #include <linux/sched.h> #include <linux/fs.h> #include <linux/mm.h> #include <linux/file.h> #include <linux/signal.h> #include <linux/resource.h> #include <linux/times.h> #include <linux/utsname.h> #include <linux/smp.h> #include <linux/smp_lock.h> #include <linux/sem.h> #include <linux/msg.h> #include <linux/shm.h> #include <linux/poll.h> #include <linux/personality.h> #include <linux/stat.h> #include <linux/mman.h> #include <linux/in.h> #include <linux/syscalls.h> #include <linux/unistd.h> #include <linux/sysctl.h> #include <linux/binfmts.h> #include <linux/security.h> #include <linux/compat.h> #include <linux/ptrace.h> #include <linux/elf.h> #include <linux/ipc.h> #include <asm/ptrace.h> #include <asm/types.h> #include <asm/uaccess.h> #include <asm/unistd.h> #include <asm/time.h> #include <asm/mmu_context.h> #include <asm/ppc-pci.h> #include <asm/syscalls.h> asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp, compat_ulong_t __user *outp, compat_ulong_t __user *exp, compat_uptr_t tvp_x) { /* sign extend n */ return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x)); } /* Note: it is necessary to treat option as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2) { return sys_sysfs((int)option, arg1, arg2); } #ifdef CONFIG_SYSVIPC long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth) { int version; version = call >> 16; /* hack for backward compatibility */ call &= 0xffff; switch (call) { case SEMTIMEDOP: if (fifth) /* sign extend semid */ return compat_sys_semtimedop((int)first, compat_ptr(ptr), second, compat_ptr(fifth)); /* else fall through for normal semop() */ case SEMOP: /* struct sembuf is the same on 32 and 64bit :)) */ /* sign extend semid */ return sys_semtimedop((int)first, compat_ptr(ptr), second, NULL); case SEMGET: /* sign extend key, nsems */ return sys_semget((int)first, (int)second, third); case SEMCTL: /* sign extend semid, semnum */ return compat_sys_semctl((int)first, (int)second, third, compat_ptr(ptr)); case MSGSND: /* sign extend msqid */ return compat_sys_msgsnd((int)first, (int)second, third, compat_ptr(ptr)); case MSGRCV: /* sign extend msqid, msgtyp */ return compat_sys_msgrcv((int)first, second, (int)fifth, third, version, compat_ptr(ptr)); case MSGGET: /* sign extend key */ return sys_msgget((int)first, second); case MSGCTL: /* sign extend msqid */ return compat_sys_msgctl((int)first, second, compat_ptr(ptr)); case SHMAT: /* sign extend shmid */ return compat_sys_shmat((int)first, second, third, version, compat_ptr(ptr)); case SHMDT: return sys_shmdt(compat_ptr(ptr)); case SHMGET: /* sign extend key_t */ return sys_shmget((int)first, second, third); case SHMCTL: /* sign extend shmid */ return compat_sys_shmctl((int)first, second, compat_ptr(ptr)); default: return -ENOSYS; } return -ENOSYS; } #endif /* Note: it is necessary to treat out_fd and in_fd as unsigned ints, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count) { mm_segment_t old_fs = get_fs(); int ret; off_t of; off_t __user *up; if (offset && get_user(of, offset)) return -EFAULT; /* The __user pointer cast is valid because of the set_fs() */ set_fs(KERNEL_DS); up = offset ? (off_t __user *) &of : NULL; ret = sys_sendfile((int)out_fd, (int)in_fd, up, count); set_fs(old_fs); if (offset && put_user(of, offset)) return -EFAULT; return ret; } asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count) { mm_segment_t old_fs = get_fs(); int ret; loff_t lof; loff_t __user *up; if (offset && get_user(lof, offset)) return -EFAULT; /* The __user pointer cast is valid because of the set_fs() */ set_fs(KERNEL_DS); up = offset ? (loff_t __user *) &lof : NULL; ret = sys_sendfile64(out_fd, in_fd, up, count); set_fs(old_fs); if (offset && put_user(lof, offset)) return -EFAULT; return ret; } long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2, unsigned long a3, unsigned long a4, unsigned long a5, struct pt_regs *regs) { int error; char * filename; filename = getname((char __user *) a0); error = PTR_ERR(filename); if (IS_ERR(filename)) goto out; flush_fp_to_thread(current); flush_altivec_to_thread(current); error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs); putname(filename); out: return error; } /* Note: it is necessary to treat option as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5) { return sys_prctl((int)option, (unsigned long) arg2, (unsigned long) arg3, (unsigned long) arg4, (unsigned long) arg5); } /* Note: it is necessary to treat pid as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval) { struct timespec t; int ret; mm_segment_t old_fs = get_fs (); /* The __user pointer cast is valid because of the set_fs() */ set_fs (KERNEL_DS); ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t); set_fs (old_fs); if (put_compat_timespec(&t, interval)) return -EFAULT; return ret; } /* Note: it is necessary to treat mode as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_access(const char __user * filename, u32 mode) { return sys_access(filename, (int)mode); } /* Note: it is necessary to treat mode as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode) { return sys_creat(pathname, (int)mode); } /* Note: it is necessary to treat pid and options as unsigned ints, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options) { return sys_waitpid((int)pid, stat_addr, (int)options); } /* Note: it is necessary to treat gidsetsize as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist) { return sys_getgroups((int)gidsetsize, grouplist); } /* Note: it is necessary to treat pid as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_getpgid(u32 pid) { return sys_getpgid((int)pid); } /* Note: it is necessary to treat pid as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_getsid(u32 pid) { return sys_getsid((int)pid); } /* Note: it is necessary to treat pid and sig as unsigned ints, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_kill(u32 pid, u32 sig) { return sys_kill((int)pid, (int)sig); } /* Note: it is necessary to treat mode as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode) { return sys_mkdir(pathname, (int)mode); } long compat_sys_nice(u32 increment) { /* sign extend increment */ return sys_nice((int)increment); } off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin) { /* sign extend n */ return sys_lseek(fd, (int)offset, origin); } /* Note: it is necessary to treat bufsiz as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz) { return sys_readlink(path, buf, (int)bufsiz); } /* Note: it is necessary to treat option as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_sched_get_priority_max(u32 policy) { return sys_sched_get_priority_max((int)policy); } /* Note: it is necessary to treat policy as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_sched_get_priority_min(u32 policy) { return sys_sched_get_priority_min((int)policy); } /* Note: it is necessary to treat pid as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param) { return sys_sched_getparam((int)pid, param); } /* Note: it is necessary to treat pid as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_sched_getscheduler(u32 pid) { return sys_sched_getscheduler((int)pid); } /* Note: it is necessary to treat pid as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param) { return sys_sched_setparam((int)pid, param); } /* Note: it is necessary to treat pid and policy as unsigned ints, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param) { return sys_sched_setscheduler((int)pid, (int)policy, param); } /* Note: it is necessary to treat len as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_setdomainname(char __user *name, u32 len) { return sys_setdomainname(name, (int)len); } /* Note: it is necessary to treat gidsetsize as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist) { return sys_setgroups((int)gidsetsize, grouplist); } asmlinkage long compat_sys_sethostname(char __user *name, u32 len) { /* sign extend len */ return sys_sethostname(name, (int)len); } /* Note: it is necessary to treat pid and pgid as unsigned ints, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid) { return sys_setpgid((int)pid, (int)pgid); } long compat_sys_getpriority(u32 which, u32 who) { /* sign extend which and who */ return sys_getpriority((int)which, (int)who); } long compat_sys_setpriority(u32 which, u32 who, u32 niceval) { /* sign extend which, who and niceval */ return sys_setpriority((int)which, (int)who, (int)niceval); } long compat_sys_ioprio_get(u32 which, u32 who) { /* sign extend which and who */ return sys_ioprio_get((int)which, (int)who); } long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio) { /* sign extend which, who and ioprio */ return sys_ioprio_set((int)which, (int)who, (int)ioprio); } /* Note: it is necessary to treat newmask as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_ssetmask(u32 newmask) { return sys_ssetmask((int) newmask); } asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len) { /* sign extend len */ return sys_syslog(type, buf, (int)len); } /* Note: it is necessary to treat mask as an unsigned int, * with the corresponding cast to a signed int to insure that the * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode) * and the register representation of a signed int (msr in 64-bit mode) is performed. */ asmlinkage long compat_sys_umask(u32 mask) { return sys_umask((int)mask); } #ifdef CONFIG_SYSCTL_SYSCALL struct __sysctl_args32 { u32 name; int nlen; u32 oldval; u32 oldlenp; u32 newval; u32 newlen; u32 __unused[4]; }; asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args) { struct __sysctl_args32 tmp; int error; size_t oldlen; size_t __user *oldlenp = NULL; unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7; if (copy_from_user(&tmp, args, sizeof(tmp))) return -EFAULT; if (tmp.oldval && tmp.oldlenp) { /* Duh, this is ugly and might not work if sysctl_args is in read-only memory, but do_sysctl does indirectly a lot of uaccess in both directions and we'd have to basically copy the whole sysctl.c here, and glibc's __sysctl uses rw memory for the structure anyway. */ oldlenp = (size_t __user *)addr; if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) || put_user(oldlen, oldlenp)) return -EFAULT; } lock_kernel(); error = do_sysctl(compat_ptr(tmp.name), tmp.nlen, compat_ptr(tmp.oldval), oldlenp, compat_ptr(tmp.newval), tmp.newlen); unlock_kernel(); if (oldlenp) { if (!error) { if (get_user(oldlen, oldlenp) || put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp))) error = -EFAULT; } copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)); } return error; } #endif unsigned long compat_sys_mmap2(unsigned long addr, size_t len, unsigned long prot, unsigned long flags, unsigned long fd, unsigned long pgoff) { /* This should remain 12 even if PAGE_SIZE changes */ return sys_mmap(addr, len, prot, flags, fd, pgoff << 12); } long compat_sys_tgkill(u32 tgid, u32 pid, int sig) { /* sign extend tgid, pid */ return sys_tgkill((int)tgid, (int)pid, sig); } /* * long long munging: * The 32 bit ABI passes long longs in an odd even register pair. */ compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count, u32 reg6, u32 poshi, u32 poslo) { return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo); } compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count, u32 reg6, u32 poshi, u32 poslo) { return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo); } compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count) { return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count); } asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4, unsigned long high, unsigned long low) { return sys_truncate(path, (high << 32) | low); } asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, u32 lenhi, u32 lenlo) { return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, ((loff_t)lenhi << 32) | lenlo); } asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high, unsigned long low) { return sys_ftruncate(fd, (high << 32) | low); } long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf, size_t len) { return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low, buf, len); } long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low, size_t len, int advice) { return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len, advice); } asmlinkage long compat_sys_add_key(const char __user *_type, const char __user *_description, const void __user *_payload, u32 plen, u32 ringid) { return sys_add_key(_type, _description, _payload, plen, ringid); } asmlinkage long compat_sys_request_key(const char __user *_type, const char __user *_description, const char __user *_callout_info, u32 destringid) { return sys_request_key(_type, _description, _callout_info, destringid); } asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags, unsigned offset_hi, unsigned offset_lo, unsigned nbytes_hi, unsigned nbytes_lo) { loff_t offset = ((loff_t)offset_hi << 32) | offset_lo; loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo; return sys_sync_file_range(fd, offset, nbytes, flags); }