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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101/* * arch/xtensa/kernel/syscall.c * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2001 - 2005 Tensilica Inc. * Copyright (C) 2000 Silicon Graphics, Inc. * Copyright (C) 1995 - 2000 by Ralf Baechle * * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com> * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca> * Chris Zankel <chris@zankel.net> * Kevin Chea * */#include <linux/uaccess.h>#include <asm/syscall.h>#include <linux/linkage.h>#include <linux/stringify.h>#include <linux/errno.h>#include <linux/syscalls.h>#include <linux/file.h>#include <linux/fs.h>#include <linux/mman.h>#include <linux/sched/mm.h>#include <linux/shm.h>
syscall_t sys_call_table[] /* FIXME __cacheline_aligned */= {#define __SYSCALL(nr, entry) (syscall_t)entry,#include <asm/syscall_table.h>};
#define COLOUR_ALIGN(addr, pgoff) \ ((((addr) + SHMLBA - 1) & ~(SHMLBA - 1)) + \ (((pgoff) << PAGE_SHIFT) & (SHMLBA - 1)))
asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg){ unsigned long ret; long err;
err = do_shmat(shmid, shmaddr, shmflg, &ret, SHMLBA); if (err) return err; return (long)ret;}
asmlinkage long xtensa_fadvise64_64(int fd, int advice, unsigned long long offset, unsigned long long len){ return ksys_fadvise64_64(fd, offset, len, advice);}
#ifdef CONFIG_MMUunsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags, vm_flags_t vm_flags){ struct vm_area_struct *vmm; struct vma_iterator vmi;
if (flags & MAP_FIXED) { /* We do not accept a shared mapping if it would violate * cache aliasing constraints. */ if ((flags & MAP_SHARED) && ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) return -EINVAL; return addr; }
if (len > TASK_SIZE) return -ENOMEM; if (!addr) addr = TASK_UNMAPPED_BASE;
if (flags & MAP_SHARED) addr = COLOUR_ALIGN(addr, pgoff); else addr = PAGE_ALIGN(addr);
vma_iter_init(&vmi, current->mm, addr); for_each_vma(vmi, vmm) { /* At this point: (addr < vmm->vm_end). */ if (addr + len <= vm_start_gap(vmm)) break;
addr = vmm->vm_end; if (flags & MAP_SHARED) addr = COLOUR_ALIGN(addr, pgoff); }
if (TASK_SIZE - len < addr) return -ENOMEM;
return addr;}#endif