baed7fc9b5
Add a generic implementation of the ipc demultiplexer syscall. Except for s390 and sparc64 all implementations of the sys_ipc are nearly identical. There are slight differences in the types of the parameters, where mips and powerpc as the only 64-bit architectures with sys_ipc use unsigned long for the "third" argument as it gets casted to a pointer later, while it traditionally is an "int" like most other paramters. frv goes even further and uses unsigned long for all parameters execept for "ptr" which is a pointer type everywhere. The change from int to unsigned long for "third" and back to "int" for the others on frv should be fine due to the in-register calling conventions for syscalls (we already had a similar issue with the generic sys_ptrace), but I'd prefer to have the arch maintainers looks over this in details. Except for that h8300, m68k and m68knommu lack an impplementation of the semtimedop sub call which this patch adds, and various architectures have gets used - at least on i386 it seems superflous as the compat code on x86-64 and ia64 doesn't even bother to implement it. [akpm@linux-foundation.org: add sys_ipc to sys_ni.c] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Reviewed-by: H. Peter Anvin <hpa@zytor.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: James Morris <jmorris@namei.org> Cc: Andreas Schwab <schwab@linux-m68k.org> Acked-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: David Howells <dhowells@redhat.com> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/*
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* linux/arch/sh/kernel/sys_sh.c
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*
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* This file contains various random system calls that
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* have a non-standard calling sequence on the Linux/SuperH
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* platform.
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*
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* Taken from i386 version.
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/mm.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/stat.h>
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#include <linux/syscalls.h>
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#include <linux/mman.h>
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#include <linux/file.h>
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#include <linux/utsname.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/ipc.h>
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#include <asm/syscalls.h>
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#include <asm/uaccess.h>
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#include <asm/unistd.h>
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#include <asm/cacheflush.h>
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#include <asm/cachectl.h>
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asmlinkage int old_mmap(unsigned long addr, unsigned long len,
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unsigned long prot, unsigned long flags,
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int fd, unsigned long off)
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{
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if (off & ~PAGE_MASK)
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return -EINVAL;
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return sys_mmap_pgoff(addr, len, prot, flags, fd, off>>PAGE_SHIFT);
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}
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asmlinkage long sys_mmap2(unsigned long addr, unsigned long 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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/*
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* The shift for mmap2 is constant, regardless of PAGE_SIZE
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* setting.
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*/
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if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1))
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return -EINVAL;
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pgoff >>= PAGE_SHIFT - 12;
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return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
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}
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/* sys_cacheflush -- flush (part of) the processor cache. */
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asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op)
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{
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struct vm_area_struct *vma;
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if ((op <= 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))
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return -EINVAL;
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/*
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* Verify that the specified address region actually belongs
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* to this process.
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*/
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if (addr + len < addr)
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return -EFAULT;
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down_read(¤t->mm->mmap_sem);
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vma = find_vma (current->mm, addr);
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if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) {
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up_read(¤t->mm->mmap_sem);
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return -EFAULT;
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}
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switch (op & CACHEFLUSH_D_PURGE) {
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case CACHEFLUSH_D_INVAL:
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__flush_invalidate_region((void *)addr, len);
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break;
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case CACHEFLUSH_D_WB:
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__flush_wback_region((void *)addr, len);
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break;
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case CACHEFLUSH_D_PURGE:
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__flush_purge_region((void *)addr, len);
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break;
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}
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if (op & CACHEFLUSH_I)
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flush_cache_all();
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up_read(¤t->mm->mmap_sem);
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return 0;
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}
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asmlinkage int sys_uname(struct old_utsname __user *name)
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{
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int err;
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if (!name)
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return -EFAULT;
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down_read(&uts_sem);
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err = copy_to_user(name, utsname(), sizeof(*name));
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up_read(&uts_sem);
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return err?-EFAULT:0;
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}
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