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authorRalf Baechle <ralf@linux-mips.org>2011-05-19 09:21:33 +0100
committerRalf Baechle <ralf@linux-mips.org>2011-05-19 09:55:49 +0100
commit6f6c3c33c027f2c83d53e8562cd9daa73fe8108b (patch)
tree51cff15bb4f6e4f8263833c74aec6cda4782d4d5 /arch/mips/kernel
parent9c1e8a9138ff92a4ff816ea8a1884ad2461a993a (diff)
MIPS: Move arch_get_unmapped_area and gang to new file.
It never really belonged into syscall.c and it's about to become well more complex. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel')
-rw-r--r--arch/mips/kernel/syscall.c113
1 files changed, 0 insertions, 113 deletions
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 0c207e8ee601..d02765708ddb 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -10,12 +10,9 @@
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/linkage.h>
-#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/smp.h>
-#include <linux/mman.h>
#include <linux/ptrace.h>
-#include <linux/sched.h>
#include <linux/string.h>
#include <linux/syscalls.h>
#include <linux/file.h>
@@ -25,11 +22,9 @@
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/compiler.h>
-#include <linux/module.h>
#include <linux/ipc.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
-#include <linux/random.h>
#include <linux/elf.h>
#include <asm/asm.h>
@@ -66,114 +61,6 @@ out:
return res;
}
-unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */
-
-EXPORT_SYMBOL(shm_align_mask);
-
-#define COLOUR_ALIGN(addr,pgoff) \
- ((((addr) + shm_align_mask) & ~shm_align_mask) + \
- (((pgoff) << PAGE_SHIFT) & shm_align_mask))
-
-unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
- unsigned long len, unsigned long pgoff, unsigned long flags)
-{
- struct vm_area_struct * vmm;
- int do_color_align;
-
- if (len > TASK_SIZE)
- return -ENOMEM;
-
- if (flags & MAP_FIXED) {
- /* Even MAP_FIXED mappings must reside within TASK_SIZE. */
- if (TASK_SIZE - len < addr)
- return -EINVAL;
-
- /*
- * We do not accept a shared mapping if it would violate
- * cache aliasing constraints.
- */
- if ((flags & MAP_SHARED) &&
- ((addr - (pgoff << PAGE_SHIFT)) & shm_align_mask))
- return -EINVAL;
- return addr;
- }
-
- do_color_align = 0;
- if (filp || (flags & MAP_SHARED))
- do_color_align = 1;
- if (addr) {
- if (do_color_align)
- addr = COLOUR_ALIGN(addr, pgoff);
- else
- addr = PAGE_ALIGN(addr);
- vmm = find_vma(current->mm, addr);
- if (TASK_SIZE - len >= addr &&
- (!vmm || addr + len <= vmm->vm_start))
- return addr;
- }
- addr = current->mm->mmap_base;
- if (do_color_align)
- addr = COLOUR_ALIGN(addr, pgoff);
- else
- addr = PAGE_ALIGN(addr);
-
- for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
- /* At this point: (!vmm || addr < vmm->vm_end). */
- if (TASK_SIZE - len < addr)
- return -ENOMEM;
- if (!vmm || addr + len <= vmm->vm_start)
- return addr;
- addr = vmm->vm_end;
- if (do_color_align)
- addr = COLOUR_ALIGN(addr, pgoff);
- }
-}
-
-void arch_pick_mmap_layout(struct mm_struct *mm)
-{
- unsigned long random_factor = 0UL;
-
- if (current->flags & PF_RANDOMIZE) {
- random_factor = get_random_int();
- random_factor = random_factor << PAGE_SHIFT;
- if (TASK_IS_32BIT_ADDR)
- random_factor &= 0xfffffful;
- else
- random_factor &= 0xffffffful;
- }
-
- mm->mmap_base = TASK_UNMAPPED_BASE + random_factor;
- mm->get_unmapped_area = arch_get_unmapped_area;
- mm->unmap_area = arch_unmap_area;
-}
-
-static inline unsigned long brk_rnd(void)
-{
- unsigned long rnd = get_random_int();
-
- rnd = rnd << PAGE_SHIFT;
- /* 8MB for 32bit, 256MB for 64bit */
- if (TASK_IS_32BIT_ADDR)
- rnd = rnd & 0x7ffffful;
- else
- rnd = rnd & 0xffffffful;
-
- return rnd;
-}
-
-unsigned long arch_randomize_brk(struct mm_struct *mm)
-{
- unsigned long base = mm->brk;
- unsigned long ret;
-
- ret = PAGE_ALIGN(base + brk_rnd());
-
- if (ret < mm->brk)
- return mm->brk;
-
- return ret;
-}
-
SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags, unsigned long,
fd, off_t, offset)