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![Dave Jones](/assets/img/avatar_default.png)
Since the x86 merge, lots of files that referenced their own filenames are no longer correct. Rather than keep them up to date, just delete them, as they add no real value. Additionally: - fix up comment formatting in scx200_32.c - Remove a credit from myself in setup_64.c from a time when we had no SCM - remove longwinded history from tsc_32.c which can be figured out from git. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
155 lines
3.6 KiB
C
155 lines
3.6 KiB
C
#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/syscalls.h>
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#include <linux/mm.h>
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#include <linux/fs.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/mman.h>
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#include <linux/file.h>
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#include <linux/utsname.h>
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#include <linux/personality.h>
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#include <asm/uaccess.h>
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#include <asm/ia32.h>
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/*
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* sys_pipe() is the normal C calling standard for creating
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* a pipe. It's not the way Unix traditionally does this, though.
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*/
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asmlinkage long sys_pipe(int __user *fildes)
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{
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int fd[2];
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int error;
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error = do_pipe(fd);
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if (!error) {
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if (copy_to_user(fildes, fd, 2*sizeof(int)))
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error = -EFAULT;
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}
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return error;
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}
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asmlinkage long sys_mmap(unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags,
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unsigned long fd, unsigned long off)
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{
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long error;
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struct file * file;
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error = -EINVAL;
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if (off & ~PAGE_MASK)
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goto out;
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error = -EBADF;
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file = NULL;
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flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
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if (!(flags & MAP_ANONYMOUS)) {
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file = fget(fd);
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if (!file)
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goto out;
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}
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down_write(¤t->mm->mmap_sem);
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error = do_mmap_pgoff(file, addr, len, prot, flags, off >> PAGE_SHIFT);
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up_write(¤t->mm->mmap_sem);
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if (file)
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fput(file);
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out:
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return error;
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}
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static void find_start_end(unsigned long flags, unsigned long *begin,
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unsigned long *end)
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{
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if (!test_thread_flag(TIF_IA32) && (flags & MAP_32BIT)) {
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/* This is usually used needed to map code in small
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model, so it needs to be in the first 31bit. Limit
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it to that. This means we need to move the
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unmapped base down for this case. This can give
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conflicts with the heap, but we assume that glibc
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malloc knows how to fall back to mmap. Give it 1GB
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of playground for now. -AK */
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*begin = 0x40000000;
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*end = 0x80000000;
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} else {
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*begin = TASK_UNMAPPED_BASE;
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*end = TASK_SIZE;
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}
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}
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unsigned long
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arch_get_unmapped_area(struct file *filp, unsigned long addr,
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unsigned long len, unsigned long pgoff, unsigned long flags)
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{
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struct mm_struct *mm = current->mm;
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struct vm_area_struct *vma;
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unsigned long start_addr;
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unsigned long begin, end;
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if (flags & MAP_FIXED)
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return addr;
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find_start_end(flags, &begin, &end);
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if (len > end)
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return -ENOMEM;
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if (addr) {
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addr = PAGE_ALIGN(addr);
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vma = find_vma(mm, addr);
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if (end - len >= addr &&
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(!vma || addr + len <= vma->vm_start))
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return addr;
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}
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if (((flags & MAP_32BIT) || test_thread_flag(TIF_IA32))
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&& len <= mm->cached_hole_size) {
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mm->cached_hole_size = 0;
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mm->free_area_cache = begin;
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}
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addr = mm->free_area_cache;
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if (addr < begin)
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addr = begin;
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start_addr = addr;
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full_search:
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for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
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/* At this point: (!vma || addr < vma->vm_end). */
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if (end - len < addr) {
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/*
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* Start a new search - just in case we missed
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* some holes.
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*/
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if (start_addr != begin) {
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start_addr = addr = begin;
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mm->cached_hole_size = 0;
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goto full_search;
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}
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return -ENOMEM;
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}
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if (!vma || addr + len <= vma->vm_start) {
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/*
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* Remember the place where we stopped the search:
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*/
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mm->free_area_cache = addr + len;
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return addr;
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}
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if (addr + mm->cached_hole_size < vma->vm_start)
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mm->cached_hole_size = vma->vm_start - addr;
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addr = vma->vm_end;
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}
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}
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asmlinkage long sys_uname(struct new_utsname __user * name)
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{
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int err;
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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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if (personality(current->personality) == PER_LINUX32)
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err |= copy_to_user(&name->machine, "i686", 5);
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return err ? -EFAULT : 0;
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}
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