710 lines
17 KiB
C
710 lines
17 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* linux/arch/sparc64/kernel/sys_sparc.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/sparc
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* platform.
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*/
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/sched/signal.h>
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#include <linux/sched/mm.h>
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#include <linux/sched/debug.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/mm.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/utsname.h>
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#include <linux/smp.h>
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#include <linux/slab.h>
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#include <linux/syscalls.h>
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#include <linux/ipc.h>
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#include <linux/personality.h>
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#include <linux/random.h>
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#include <linux/export.h>
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#include <linux/context_tracking.h>
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#include <linux/timex.h>
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#include <linux/uaccess.h>
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#include <asm/utrap.h>
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#include <asm/unistd.h>
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#include "entry.h"
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#include "kernel.h"
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#include "systbls.h"
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/* #define DEBUG_UNIMP_SYSCALL */
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SYSCALL_DEFINE0(getpagesize)
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{
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return PAGE_SIZE;
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}
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/* Does addr --> addr+len fall within 4GB of the VA-space hole or
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* overflow past the end of the 64-bit address space?
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*/
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static inline int invalid_64bit_range(unsigned long addr, unsigned long len)
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{
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unsigned long va_exclude_start, va_exclude_end;
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va_exclude_start = VA_EXCLUDE_START;
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va_exclude_end = VA_EXCLUDE_END;
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if (unlikely(len >= va_exclude_start))
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return 1;
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if (unlikely((addr + len) < addr))
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return 1;
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if (unlikely((addr >= va_exclude_start && addr < va_exclude_end) ||
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((addr + len) >= va_exclude_start &&
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(addr + len) < va_exclude_end)))
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return 1;
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return 0;
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}
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/* These functions differ from the default implementations in
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* mm/mmap.c in two ways:
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*
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* 1) For file backed MAP_SHARED mmap()'s we D-cache color align,
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* for fixed such mappings we just validate what the user gave us.
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* 2) For 64-bit tasks we avoid mapping anything within 4GB of
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* the spitfire/niagara VA-hole.
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*/
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static inline unsigned long COLOR_ALIGN(unsigned long addr,
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unsigned long pgoff)
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{
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unsigned long base = (addr+SHMLBA-1)&~(SHMLBA-1);
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unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1);
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return base + off;
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}
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unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, 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 task_size = TASK_SIZE;
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int do_color_align;
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struct vm_unmapped_area_info info;
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if (flags & MAP_FIXED) {
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/* We do not accept a shared mapping if it would violate
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* cache aliasing constraints.
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*/
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if ((flags & MAP_SHARED) &&
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((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
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return -EINVAL;
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return addr;
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}
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if (test_thread_flag(TIF_32BIT))
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task_size = STACK_TOP32;
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if (unlikely(len > task_size || len >= VA_EXCLUDE_START))
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return -ENOMEM;
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do_color_align = 0;
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if (filp || (flags & MAP_SHARED))
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do_color_align = 1;
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if (addr) {
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if (do_color_align)
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addr = COLOR_ALIGN(addr, pgoff);
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else
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addr = PAGE_ALIGN(addr);
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vma = find_vma(mm, addr);
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if (task_size - len >= addr &&
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(!vma || addr + len <= vm_start_gap(vma)))
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return addr;
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}
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info.flags = 0;
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info.length = len;
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info.low_limit = TASK_UNMAPPED_BASE;
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info.high_limit = min(task_size, VA_EXCLUDE_START);
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info.align_mask = do_color_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
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info.align_offset = pgoff << PAGE_SHIFT;
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addr = vm_unmapped_area(&info);
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if ((addr & ~PAGE_MASK) && task_size > VA_EXCLUDE_END) {
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VM_BUG_ON(addr != -ENOMEM);
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info.low_limit = VA_EXCLUDE_END;
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info.high_limit = task_size;
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addr = vm_unmapped_area(&info);
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}
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return addr;
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}
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unsigned long
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arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
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const unsigned long len, const unsigned long pgoff,
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const unsigned long flags)
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{
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struct vm_area_struct *vma;
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struct mm_struct *mm = current->mm;
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unsigned long task_size = STACK_TOP32;
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unsigned long addr = addr0;
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int do_color_align;
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struct vm_unmapped_area_info info;
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/* This should only ever run for 32-bit processes. */
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BUG_ON(!test_thread_flag(TIF_32BIT));
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if (flags & MAP_FIXED) {
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/* We do not accept a shared mapping if it would violate
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* cache aliasing constraints.
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*/
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if ((flags & MAP_SHARED) &&
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((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)))
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return -EINVAL;
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return addr;
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}
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if (unlikely(len > task_size))
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return -ENOMEM;
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do_color_align = 0;
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if (filp || (flags & MAP_SHARED))
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do_color_align = 1;
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/* requesting a specific address */
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if (addr) {
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if (do_color_align)
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addr = COLOR_ALIGN(addr, pgoff);
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else
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addr = PAGE_ALIGN(addr);
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vma = find_vma(mm, addr);
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if (task_size - len >= addr &&
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(!vma || addr + len <= vm_start_gap(vma)))
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return addr;
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}
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info.flags = VM_UNMAPPED_AREA_TOPDOWN;
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info.length = len;
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info.low_limit = PAGE_SIZE;
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info.high_limit = mm->mmap_base;
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info.align_mask = do_color_align ? (PAGE_MASK & (SHMLBA - 1)) : 0;
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info.align_offset = pgoff << PAGE_SHIFT;
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addr = vm_unmapped_area(&info);
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/*
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* A failed mmap() very likely causes application failure,
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* so fall back to the bottom-up function here. This scenario
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* can happen with large stack limits and large mmap()
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* allocations.
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*/
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if (addr & ~PAGE_MASK) {
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VM_BUG_ON(addr != -ENOMEM);
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info.flags = 0;
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info.low_limit = TASK_UNMAPPED_BASE;
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info.high_limit = STACK_TOP32;
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addr = vm_unmapped_area(&info);
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}
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return addr;
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}
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/* Try to align mapping such that we align it as much as possible. */
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unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags)
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{
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unsigned long align_goal, addr = -ENOMEM;
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unsigned long (*get_area)(struct file *, unsigned long,
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unsigned long, unsigned long, unsigned long);
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get_area = current->mm->get_unmapped_area;
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if (flags & MAP_FIXED) {
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/* Ok, don't mess with it. */
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return get_area(NULL, orig_addr, len, pgoff, flags);
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}
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flags &= ~MAP_SHARED;
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align_goal = PAGE_SIZE;
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if (len >= (4UL * 1024 * 1024))
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align_goal = (4UL * 1024 * 1024);
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else if (len >= (512UL * 1024))
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align_goal = (512UL * 1024);
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else if (len >= (64UL * 1024))
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align_goal = (64UL * 1024);
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do {
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addr = get_area(NULL, orig_addr, len + (align_goal - PAGE_SIZE), pgoff, flags);
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if (!(addr & ~PAGE_MASK)) {
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addr = (addr + (align_goal - 1UL)) & ~(align_goal - 1UL);
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break;
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}
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if (align_goal == (4UL * 1024 * 1024))
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align_goal = (512UL * 1024);
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else if (align_goal == (512UL * 1024))
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align_goal = (64UL * 1024);
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else
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align_goal = PAGE_SIZE;
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} while ((addr & ~PAGE_MASK) && align_goal > PAGE_SIZE);
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/* Mapping is smaller than 64K or larger areas could not
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* be obtained.
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*/
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if (addr & ~PAGE_MASK)
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addr = get_area(NULL, orig_addr, len, pgoff, flags);
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return addr;
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}
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EXPORT_SYMBOL(get_fb_unmapped_area);
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/* Essentially the same as PowerPC. */
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static unsigned long mmap_rnd(void)
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{
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unsigned long rnd = 0UL;
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if (current->flags & PF_RANDOMIZE) {
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unsigned long val = get_random_long();
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if (test_thread_flag(TIF_32BIT))
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rnd = (val % (1UL << (23UL-PAGE_SHIFT)));
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else
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rnd = (val % (1UL << (30UL-PAGE_SHIFT)));
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}
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return rnd << PAGE_SHIFT;
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}
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void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack)
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{
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unsigned long random_factor = mmap_rnd();
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unsigned long gap;
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/*
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* Fall back to the standard layout if the personality
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* bit is set, or if the expected stack growth is unlimited:
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*/
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gap = rlim_stack->rlim_cur;
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if (!test_thread_flag(TIF_32BIT) ||
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(current->personality & ADDR_COMPAT_LAYOUT) ||
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gap == RLIM_INFINITY ||
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sysctl_legacy_va_layout) {
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mm->mmap_base = TASK_UNMAPPED_BASE + random_factor;
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mm->get_unmapped_area = arch_get_unmapped_area;
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} else {
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/* We know it's 32-bit */
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unsigned long task_size = STACK_TOP32;
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if (gap < 128 * 1024 * 1024)
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gap = 128 * 1024 * 1024;
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if (gap > (task_size / 6 * 5))
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gap = (task_size / 6 * 5);
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mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor);
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mm->get_unmapped_area = arch_get_unmapped_area_topdown;
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}
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}
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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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SYSCALL_DEFINE0(sparc_pipe)
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{
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int fd[2];
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int error;
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error = do_pipe_flags(fd, 0);
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if (error)
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goto out;
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current_pt_regs()->u_regs[UREG_I1] = fd[1];
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error = fd[0];
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out:
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return error;
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}
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/*
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* sys_ipc() is the de-multiplexer for the SysV IPC calls..
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*
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* This is really horribly ugly.
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*/
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SYSCALL_DEFINE6(sparc_ipc, unsigned int, call, int, first, unsigned long, second,
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unsigned long, third, void __user *, ptr, long, fifth)
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{
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long err;
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if (!IS_ENABLED(CONFIG_SYSVIPC))
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return -ENOSYS;
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/* No need for backward compatibility. We can start fresh... */
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if (call <= SEMTIMEDOP) {
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switch (call) {
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case SEMOP:
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err = ksys_semtimedop(first, ptr,
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(unsigned int)second, NULL);
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goto out;
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case SEMTIMEDOP:
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err = ksys_semtimedop(first, ptr, (unsigned int)second,
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(const struct __kernel_timespec __user *)
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(unsigned long) fifth);
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goto out;
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case SEMGET:
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err = ksys_semget(first, (int)second, (int)third);
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goto out;
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case SEMCTL: {
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err = ksys_old_semctl(first, second,
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(int)third | IPC_64,
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(unsigned long) ptr);
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goto out;
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}
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default:
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err = -ENOSYS;
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goto out;
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}
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}
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if (call <= MSGCTL) {
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switch (call) {
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case MSGSND:
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err = ksys_msgsnd(first, ptr, (size_t)second,
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(int)third);
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goto out;
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case MSGRCV:
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err = ksys_msgrcv(first, ptr, (size_t)second, fifth,
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||
|
|
(int)third);
|
||
|
|
goto out;
|
||
|
|
case MSGGET:
|
||
|
|
err = ksys_msgget((key_t)first, (int)second);
|
||
|
|
goto out;
|
||
|
|
case MSGCTL:
|
||
|
|
err = ksys_old_msgctl(first, (int)second | IPC_64, ptr);
|
||
|
|
goto out;
|
||
|
|
default:
|
||
|
|
err = -ENOSYS;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (call <= SHMCTL) {
|
||
|
|
switch (call) {
|
||
|
|
case SHMAT: {
|
||
|
|
ulong raddr;
|
||
|
|
err = do_shmat(first, ptr, (int)second, &raddr, SHMLBA);
|
||
|
|
if (!err) {
|
||
|
|
if (put_user(raddr,
|
||
|
|
(ulong __user *) third))
|
||
|
|
err = -EFAULT;
|
||
|
|
}
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
case SHMDT:
|
||
|
|
err = ksys_shmdt(ptr);
|
||
|
|
goto out;
|
||
|
|
case SHMGET:
|
||
|
|
err = ksys_shmget(first, (size_t)second, (int)third);
|
||
|
|
goto out;
|
||
|
|
case SHMCTL:
|
||
|
|
err = ksys_old_shmctl(first, (int)second | IPC_64, ptr);
|
||
|
|
goto out;
|
||
|
|
default:
|
||
|
|
err = -ENOSYS;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
err = -ENOSYS;
|
||
|
|
}
|
||
|
|
out:
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCALL_DEFINE1(sparc64_personality, unsigned long, personality)
|
||
|
|
{
|
||
|
|
long ret;
|
||
|
|
|
||
|
|
if (personality(current->personality) == PER_LINUX32 &&
|
||
|
|
personality(personality) == PER_LINUX)
|
||
|
|
personality |= PER_LINUX32;
|
||
|
|
ret = sys_personality(personality);
|
||
|
|
if (personality(ret) == PER_LINUX32)
|
||
|
|
ret &= ~PER_LINUX32;
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
int sparc_mmap_check(unsigned long addr, unsigned long len)
|
||
|
|
{
|
||
|
|
if (test_thread_flag(TIF_32BIT)) {
|
||
|
|
if (len >= STACK_TOP32)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (addr > STACK_TOP32 - len)
|
||
|
|
return -EINVAL;
|
||
|
|
} else {
|
||
|
|
if (len >= VA_EXCLUDE_START)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (invalid_64bit_range(addr, len))
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Linux version of mmap */
|
||
|
|
SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
|
||
|
|
unsigned long, prot, unsigned long, flags, unsigned long, fd,
|
||
|
|
unsigned long, off)
|
||
|
|
{
|
||
|
|
unsigned long retval = -EINVAL;
|
||
|
|
|
||
|
|
if ((off + PAGE_ALIGN(len)) < off)
|
||
|
|
goto out;
|
||
|
|
if (off & ~PAGE_MASK)
|
||
|
|
goto out;
|
||
|
|
retval = ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
|
||
|
|
out:
|
||
|
|
return retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCALL_DEFINE2(64_munmap, unsigned long, addr, size_t, len)
|
||
|
|
{
|
||
|
|
if (invalid_64bit_range(addr, len))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
return vm_munmap(addr, len);
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCALL_DEFINE5(64_mremap, unsigned long, addr, unsigned long, old_len,
|
||
|
|
unsigned long, new_len, unsigned long, flags,
|
||
|
|
unsigned long, new_addr)
|
||
|
|
{
|
||
|
|
if (test_thread_flag(TIF_32BIT))
|
||
|
|
return -EINVAL;
|
||
|
|
return sys_mremap(addr, old_len, new_len, flags, new_addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCALL_DEFINE0(nis_syscall)
|
||
|
|
{
|
||
|
|
static int count;
|
||
|
|
struct pt_regs *regs = current_pt_regs();
|
||
|
|
|
||
|
|
/* Don't make the system unusable, if someone goes stuck */
|
||
|
|
if (count++ > 5)
|
||
|
|
return -ENOSYS;
|
||
|
|
|
||
|
|
printk ("Unimplemented SPARC system call %ld\n",regs->u_regs[1]);
|
||
|
|
#ifdef DEBUG_UNIMP_SYSCALL
|
||
|
|
show_regs (regs);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return -ENOSYS;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* #define DEBUG_SPARC_BREAKPOINT */
|
||
|
|
|
||
|
|
asmlinkage void sparc_breakpoint(struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
enum ctx_state prev_state = exception_enter();
|
||
|
|
|
||
|
|
if (test_thread_flag(TIF_32BIT)) {
|
||
|
|
regs->tpc &= 0xffffffff;
|
||
|
|
regs->tnpc &= 0xffffffff;
|
||
|
|
}
|
||
|
|
#ifdef DEBUG_SPARC_BREAKPOINT
|
||
|
|
printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc);
|
||
|
|
#endif
|
||
|
|
force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->tpc);
|
||
|
|
#ifdef DEBUG_SPARC_BREAKPOINT
|
||
|
|
printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc);
|
||
|
|
#endif
|
||
|
|
exception_exit(prev_state);
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCALL_DEFINE2(getdomainname, char __user *, name, int, len)
|
||
|
|
{
|
||
|
|
int nlen, err;
|
||
|
|
char tmp[__NEW_UTS_LEN + 1];
|
||
|
|
|
||
|
|
if (len < 0)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
down_read(&uts_sem);
|
||
|
|
|
||
|
|
nlen = strlen(utsname()->domainname) + 1;
|
||
|
|
err = -EINVAL;
|
||
|
|
if (nlen > len)
|
||
|
|
goto out_unlock;
|
||
|
|
memcpy(tmp, utsname()->domainname, nlen);
|
||
|
|
|
||
|
|
up_read(&uts_sem);
|
||
|
|
|
||
|
|
if (copy_to_user(name, tmp, nlen))
|
||
|
|
return -EFAULT;
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
out_unlock:
|
||
|
|
up_read(&uts_sem);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCALL_DEFINE1(sparc_adjtimex, struct __kernel_timex __user *, txc_p)
|
||
|
|
{
|
||
|
|
struct __kernel_timex txc;
|
||
|
|
struct __kernel_old_timeval *tv = (void *)&txc.time;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* Copy the user data space into the kernel copy
|
||
|
|
* structure. But bear in mind that the structures
|
||
|
|
* may change
|
||
|
|
*/
|
||
|
|
if (copy_from_user(&txc, txc_p, sizeof(txc)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* override for sparc64 specific timeval type: tv_usec
|
||
|
|
* is 32 bit wide instead of 64-bit in __kernel_timex
|
||
|
|
*/
|
||
|
|
txc.time.tv_usec = tv->tv_usec;
|
||
|
|
ret = do_adjtimex(&txc);
|
||
|
|
tv->tv_usec = txc.time.tv_usec;
|
||
|
|
|
||
|
|
return copy_to_user(txc_p, &txc, sizeof(txc)) ? -EFAULT : ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCALL_DEFINE2(sparc_clock_adjtime, const clockid_t, which_clock,
|
||
|
|
struct __kernel_timex __user *, txc_p)
|
||
|
|
{
|
||
|
|
struct __kernel_timex txc;
|
||
|
|
struct __kernel_old_timeval *tv = (void *)&txc.time;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (!IS_ENABLED(CONFIG_POSIX_TIMERS)) {
|
||
|
|
pr_err_once("process %d (%s) attempted a POSIX timer syscall "
|
||
|
|
"while CONFIG_POSIX_TIMERS is not set\n",
|
||
|
|
current->pid, current->comm);
|
||
|
|
|
||
|
|
return -ENOSYS;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Copy the user data space into the kernel copy
|
||
|
|
* structure. But bear in mind that the structures
|
||
|
|
* may change
|
||
|
|
*/
|
||
|
|
if (copy_from_user(&txc, txc_p, sizeof(txc)))
|
||
|
|
return -EFAULT;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* override for sparc64 specific timeval type: tv_usec
|
||
|
|
* is 32 bit wide instead of 64-bit in __kernel_timex
|
||
|
|
*/
|
||
|
|
txc.time.tv_usec = tv->tv_usec;
|
||
|
|
ret = do_clock_adjtime(which_clock, &txc);
|
||
|
|
tv->tv_usec = txc.time.tv_usec;
|
||
|
|
|
||
|
|
return copy_to_user(txc_p, &txc, sizeof(txc)) ? -EFAULT : ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCALL_DEFINE5(utrap_install, utrap_entry_t, type,
|
||
|
|
utrap_handler_t, new_p, utrap_handler_t, new_d,
|
||
|
|
utrap_handler_t __user *, old_p,
|
||
|
|
utrap_handler_t __user *, old_d)
|
||
|
|
{
|
||
|
|
if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31)
|
||
|
|
return -EINVAL;
|
||
|
|
if (new_p == (utrap_handler_t)(long)UTH_NOCHANGE) {
|
||
|
|
if (old_p) {
|
||
|
|
if (!current_thread_info()->utraps) {
|
||
|
|
if (put_user(NULL, old_p))
|
||
|
|
return -EFAULT;
|
||
|
|
} else {
|
||
|
|
if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (old_d) {
|
||
|
|
if (put_user(NULL, old_d))
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
if (!current_thread_info()->utraps) {
|
||
|
|
current_thread_info()->utraps =
|
||
|
|
kcalloc(UT_TRAP_INSTRUCTION_31 + 1, sizeof(long),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (!current_thread_info()->utraps)
|
||
|
|
return -ENOMEM;
|
||
|
|
current_thread_info()->utraps[0] = 1;
|
||
|
|
} else {
|
||
|
|
if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p &&
|
||
|
|
current_thread_info()->utraps[0] > 1) {
|
||
|
|
unsigned long *p = current_thread_info()->utraps;
|
||
|
|
|
||
|
|
current_thread_info()->utraps =
|
||
|
|
kmalloc_array(UT_TRAP_INSTRUCTION_31 + 1,
|
||
|
|
sizeof(long),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (!current_thread_info()->utraps) {
|
||
|
|
current_thread_info()->utraps = p;
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
p[0]--;
|
||
|
|
current_thread_info()->utraps[0] = 1;
|
||
|
|
memcpy(current_thread_info()->utraps+1, p+1,
|
||
|
|
UT_TRAP_INSTRUCTION_31*sizeof(long));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (old_p) {
|
||
|
|
if (put_user((utrap_handler_t)(current_thread_info()->utraps[type]), old_p))
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
if (old_d) {
|
||
|
|
if (put_user(NULL, old_d))
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
current_thread_info()->utraps[type] = (long)new_p;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCALL_DEFINE1(memory_ordering, unsigned long, model)
|
||
|
|
{
|
||
|
|
struct pt_regs *regs = current_pt_regs();
|
||
|
|
if (model >= 3)
|
||
|
|
return -EINVAL;
|
||
|
|
regs->tstate = (regs->tstate & ~TSTATE_MM) | (model << 14);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
|
||
|
|
struct sigaction __user *, oact, void __user *, restorer,
|
||
|
|
size_t, sigsetsize)
|
||
|
|
{
|
||
|
|
struct k_sigaction new_ka, old_ka;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* XXX: Don't preclude handling different sized sigset_t's. */
|
||
|
|
if (sigsetsize != sizeof(sigset_t))
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (act) {
|
||
|
|
new_ka.ka_restorer = restorer;
|
||
|
|
if (copy_from_user(&new_ka.sa, act, sizeof(*act)))
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
|
||
|
|
|
||
|
|
if (!ret && oact) {
|
||
|
|
if (copy_to_user(oact, &old_ka.sa, sizeof(*oact)))
|
||
|
|
return -EFAULT;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
SYSCALL_DEFINE0(kern_features)
|
||
|
|
{
|
||
|
|
return KERN_FEATURE_MIXED_MODE_STACK;
|
||
|
|
}
|