245 lines
7 KiB
C
245 lines
7 KiB
C
/*
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* sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
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*
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* Copyright (C) 2001 IBM
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* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
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* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
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*
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* These routines maintain argument size conversion between 32bit and 64bit
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* environment.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/mm.h>
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#include <linux/file.h>
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#include <linux/signal.h>
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#include <linux/resource.h>
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#include <linux/times.h>
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#include <linux/smp.h>
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#include <linux/sem.h>
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#include <linux/msg.h>
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#include <linux/shm.h>
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#include <linux/poll.h>
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#include <linux/personality.h>
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#include <linux/stat.h>
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#include <linux/mman.h>
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#include <linux/in.h>
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#include <linux/syscalls.h>
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#include <linux/unistd.h>
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#include <linux/sysctl.h>
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#include <linux/binfmts.h>
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#include <linux/security.h>
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#include <linux/compat.h>
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#include <linux/ptrace.h>
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#include <linux/elf.h>
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#include <linux/ipc.h>
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#include <linux/slab.h>
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#include <asm/ptrace.h>
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#include <asm/types.h>
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#include <asm/uaccess.h>
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#include <asm/unistd.h>
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#include <asm/time.h>
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#include <asm/mmu_context.h>
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#include <asm/ppc-pci.h>
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#include <asm/syscalls.h>
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#include <asm/switch_to.h>
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asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
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compat_ulong_t __user *outp, compat_ulong_t __user *exp,
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compat_uptr_t tvp_x)
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{
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/* sign extend n */
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return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
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}
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#ifdef CONFIG_SYSVIPC
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long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
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u32 fifth)
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{
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int version;
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version = call >> 16; /* hack for backward compatibility */
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call &= 0xffff;
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switch (call) {
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case SEMTIMEDOP:
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if (fifth)
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/* sign extend semid */
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return compat_sys_semtimedop((int)first,
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compat_ptr(ptr), second,
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compat_ptr(fifth));
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/* else fall through for normal semop() */
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case SEMOP:
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/* struct sembuf is the same on 32 and 64bit :)) */
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/* sign extend semid */
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return sys_semtimedop((int)first, compat_ptr(ptr), second,
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NULL);
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case SEMGET:
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/* sign extend key, nsems */
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return sys_semget((int)first, (int)second, third);
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case SEMCTL:
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/* sign extend semid, semnum */
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return compat_sys_semctl((int)first, (int)second, third,
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compat_ptr(ptr));
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case MSGSND:
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/* sign extend msqid */
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return compat_sys_msgsnd((int)first, (int)second, third,
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compat_ptr(ptr));
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case MSGRCV:
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/* sign extend msqid, msgtyp */
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return compat_sys_msgrcv((int)first, second, (int)fifth,
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third, version, compat_ptr(ptr));
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case MSGGET:
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/* sign extend key */
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return sys_msgget((int)first, second);
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case MSGCTL:
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/* sign extend msqid */
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return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
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case SHMAT:
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/* sign extend shmid */
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return compat_sys_shmat((int)first, second, third, version,
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compat_ptr(ptr));
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case SHMDT:
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return sys_shmdt(compat_ptr(ptr));
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case SHMGET:
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/* sign extend key_t */
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return sys_shmget((int)first, second, third);
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case SHMCTL:
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/* sign extend shmid */
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return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
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default:
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return -ENOSYS;
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}
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return -ENOSYS;
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}
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#endif
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/* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
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* with the corresponding cast to a signed int to insure that the
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* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
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* and the register representation of a signed int (msr in 64-bit mode) is performed.
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*/
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asmlinkage long compat_sys_sendfile_wrapper(u32 out_fd, u32 in_fd,
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compat_off_t __user *offset, u32 count)
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{
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return compat_sys_sendfile((int)out_fd, (int)in_fd, offset, count);
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}
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asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd,
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compat_loff_t __user *offset, u32 count)
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{
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return sys_sendfile((int)out_fd, (int)in_fd,
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(off_t __user *)offset, count);
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}
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unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
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unsigned long prot, unsigned long flags,
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unsigned long fd, unsigned long pgoff)
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{
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/* This should remain 12 even if PAGE_SIZE changes */
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return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
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}
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/*
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* long long munging:
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* The 32 bit ABI passes long longs in an odd even register pair.
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*/
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compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
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u32 reg6, u32 poshi, u32 poslo)
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{
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return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
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}
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compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
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u32 reg6, u32 poshi, u32 poslo)
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{
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return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
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}
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compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
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{
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return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
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}
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asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
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unsigned long high, unsigned long low)
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{
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return sys_truncate(path, (high << 32) | low);
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}
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asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
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u32 lenhi, u32 lenlo)
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{
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return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
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((loff_t)lenhi << 32) | lenlo);
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}
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asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
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unsigned long low)
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{
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return sys_ftruncate(fd, (high << 32) | low);
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}
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long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
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size_t len)
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{
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return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
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buf, len);
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}
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long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
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size_t len, int advice)
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{
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return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
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advice);
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}
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asmlinkage long compat_sys_add_key(const char __user *_type,
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const char __user *_description,
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const void __user *_payload,
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u32 plen,
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u32 ringid)
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{
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return sys_add_key(_type, _description, _payload, plen, ringid);
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}
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asmlinkage long compat_sys_request_key(const char __user *_type,
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const char __user *_description,
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const char __user *_callout_info,
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u32 destringid)
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{
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return sys_request_key(_type, _description, _callout_info, destringid);
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}
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asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
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unsigned offset_hi, unsigned offset_lo,
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unsigned nbytes_hi, unsigned nbytes_lo)
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{
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loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
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loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
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return sys_sync_file_range(fd, offset, nbytes, flags);
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}
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asmlinkage long compat_sys_fanotify_mark(int fanotify_fd, unsigned int flags,
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unsigned mask_hi, unsigned mask_lo,
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int dfd, const char __user *pathname)
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{
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u64 mask = ((u64)mask_hi << 32) | mask_lo;
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return sys_fanotify_mark(fanotify_fd, flags, mask, dfd, pathname);
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}
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