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Revision 7008ee121089b8193aea918b98850fe87d996508 authored by Linus Torvalds on 19 January 2020, 20:10:28 UTC, committed by Linus Torvalds on 19 January 2020, 20:10:28 UTC 
Merge tag 'riscv/for-v5.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
 
Pull RISC-V fixes from Paul Walmsley:
 "Three fixes for RISC-V:

   - Don't free and reuse memory containing the code that CPUs parked at
     boot reside in.

   - Fix rv64 build problems for ubsan and some modules by adding
     logical and arithmetic shift helpers for 128-bit values. These are
     from libgcc and are similar to what's present for ARM64.

   - Fix vDSO builds to clean up their own temporary files"

* tag 'riscv/for-v5.5-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Less inefficient gcc tishift helpers (and export their symbols)
  riscv: delete temporary files
  riscv: make sure the cores stay looping in .Lsecondary_park
2 parent s 11a8272 + fc585d4
Raw File
compat.c 
// SPDX-License-Identifier: GPL-2.0
/*
 * 32 bit compatibility code for System V IPC
 *
 * Copyright (C) 1997,1998	Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 * Copyright (C) 1997		David S. Miller (davem@caip.rutgers.edu)
 * Copyright (C) 1999		Arun Sharma <arun.sharma@intel.com>
 * Copyright (C) 2000		VA Linux Co
 * Copyright (C) 2000		Don Dugger <n0ano@valinux.com>
 * Copyright (C) 2000           Hewlett-Packard Co.
 * Copyright (C) 2000           David Mosberger-Tang <davidm@hpl.hp.com>
 * Copyright (C) 2000           Gerhard Tonn (ton@de.ibm.com)
 * Copyright (C) 2000-2002      Andi Kleen, SuSE Labs (x86-64 port)
 * Copyright (C) 2000		Silicon Graphics, Inc.
 * Copyright (C) 2001		IBM
 * Copyright (C) 2004		IBM Deutschland Entwicklung GmbH, IBM Corporation
 * Copyright (C) 2004		Arnd Bergmann (arnd@arndb.de)
 *
 * This code is collected from the versions for sparc64, mips64, s390x, ia64,
 * ppc64 and x86_64, all of which are based on the original sparc64 version
 * by Jakub Jelinek.
 *
 */
#include <linux/compat.h>
#include <linux/errno.h>
#include <linux/highuid.h>
#include <linux/init.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/syscalls.h>
#include <linux/ptrace.h>

#include <linux/mutex.h>
#include <linux/uaccess.h>

#include "util.h"

int get_compat_ipc64_perm(struct ipc64_perm *to,
			  struct compat_ipc64_perm __user *from)
{
	struct compat_ipc64_perm v;
	if (copy_from_user(&v, from, sizeof(v)))
		return -EFAULT;
	to->uid = v.uid;
	to->gid = v.gid;
	to->mode = v.mode;
	return 0;
}

int get_compat_ipc_perm(struct ipc64_perm *to,
			struct compat_ipc_perm __user *from)
{
	struct compat_ipc_perm v;
	if (copy_from_user(&v, from, sizeof(v)))
		return -EFAULT;
	to->uid = v.uid;
	to->gid = v.gid;
	to->mode = v.mode;
	return 0;
}

void to_compat_ipc64_perm(struct compat_ipc64_perm *to, struct ipc64_perm *from)
{
	to->key = from->key;
	to->uid = from->uid;
	to->gid = from->gid;
	to->cuid = from->cuid;
	to->cgid = from->cgid;
	to->mode = from->mode;
	to->seq = from->seq;
}

void to_compat_ipc_perm(struct compat_ipc_perm *to, struct ipc64_perm *from)
{
	to->key = from->key;
	SET_UID(to->uid, from->uid);
	SET_GID(to->gid, from->gid);
	SET_UID(to->cuid, from->cuid);
	SET_GID(to->cgid, from->cgid);
	to->mode = from->mode;
	to->seq = from->seq;
}
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