65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
/*
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* Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Copyright 2003 PathScale, Inc.
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*
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* Licensed under the GPL
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*/
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#include <linux/sched.h>
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#include <linux/sched/mm.h>
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#include <linux/syscalls.h>
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#include <linux/uaccess.h>
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#include <asm/prctl.h> /* XXX This should get the constants from libc */
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#include <registers.h>
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#include <os.h>
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long arch_prctl(struct task_struct *task, int option,
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unsigned long __user *arg2)
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{
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long ret = -EINVAL;
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switch (option) {
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case ARCH_SET_FS:
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current->thread.regs.regs.gp[FS_BASE / sizeof(unsigned long)] =
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(unsigned long) arg2;
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ret = 0;
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break;
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case ARCH_SET_GS:
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current->thread.regs.regs.gp[GS_BASE / sizeof(unsigned long)] =
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(unsigned long) arg2;
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ret = 0;
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break;
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case ARCH_GET_FS:
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ret = put_user(current->thread.regs.regs.gp[FS_BASE / sizeof(unsigned long)], arg2);
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break;
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case ARCH_GET_GS:
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ret = put_user(current->thread.regs.regs.gp[GS_BASE / sizeof(unsigned long)], arg2);
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break;
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}
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return ret;
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}
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SYSCALL_DEFINE2(arch_prctl, int, option, unsigned long, arg2)
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{
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return arch_prctl(current, option, (unsigned long __user *) arg2);
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}
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void arch_switch_to(struct task_struct *to)
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{
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/*
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* Nothing needs to be done on x86_64.
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* The FS_BASE/GS_BASE registers are saved in the ptrace register set.
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*/
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}
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SYSCALL_DEFINE6(mmap, 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, off)
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{
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if (off & ~PAGE_MASK)
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return -EINVAL;
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return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
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}
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