cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sys_ppc32.c (3510B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
      4 *
      5 * Copyright (C) 2001 IBM
      6 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
      7 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
      8 *
      9 * These routines maintain argument size conversion between 32bit and 64bit
     10 * environment.
     11 */
     12
     13#include <linux/kernel.h>
     14#include <linux/sched.h>
     15#include <linux/fs.h> 
     16#include <linux/mm.h> 
     17#include <linux/file.h> 
     18#include <linux/signal.h>
     19#include <linux/resource.h>
     20#include <linux/times.h>
     21#include <linux/smp.h>
     22#include <linux/sem.h>
     23#include <linux/msg.h>
     24#include <linux/shm.h>
     25#include <linux/poll.h>
     26#include <linux/personality.h>
     27#include <linux/stat.h>
     28#include <linux/mman.h>
     29#include <linux/in.h>
     30#include <linux/syscalls.h>
     31#include <linux/unistd.h>
     32#include <linux/sysctl.h>
     33#include <linux/binfmts.h>
     34#include <linux/security.h>
     35#include <linux/compat.h>
     36#include <linux/ptrace.h>
     37#include <linux/elf.h>
     38#include <linux/ipc.h>
     39#include <linux/slab.h>
     40
     41#include <asm/ptrace.h>
     42#include <asm/types.h>
     43#include <linux/uaccess.h>
     44#include <asm/unistd.h>
     45#include <asm/time.h>
     46#include <asm/mmu_context.h>
     47#include <asm/ppc-pci.h>
     48#include <asm/syscalls.h>
     49#include <asm/switch_to.h>
     50
     51unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
     52			  unsigned long prot, unsigned long flags,
     53			  unsigned long fd, unsigned long pgoff)
     54{
     55	/* This should remain 12 even if PAGE_SIZE changes */
     56	return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
     57}
     58
     59/* 
     60 * long long munging:
     61 * The 32 bit ABI passes long longs in an odd even register pair.
     62 * High and low parts are swapped depending on endian mode,
     63 * so define a macro (similar to mips linux32) to handle that.
     64 */
     65#ifdef __LITTLE_ENDIAN__
     66#define merge_64(low, high) ((u64)high << 32) | low
     67#else
     68#define merge_64(high, low) ((u64)high << 32) | low
     69#endif
     70
     71compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
     72			     u32 reg6, u32 pos1, u32 pos2)
     73{
     74	return ksys_pread64(fd, ubuf, count, merge_64(pos1, pos2));
     75}
     76
     77compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
     78			      u32 reg6, u32 pos1, u32 pos2)
     79{
     80	return ksys_pwrite64(fd, ubuf, count, merge_64(pos1, pos2));
     81}
     82
     83compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offset1, u32 offset2, u32 count)
     84{
     85	return ksys_readahead(fd, merge_64(offset1, offset2), count);
     86}
     87
     88asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
     89				unsigned long len1, unsigned long len2)
     90{
     91	return ksys_truncate(path, merge_64(len1, len2));
     92}
     93
     94asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offset1, u32 offset2,
     95				     u32 len1, u32 len2)
     96{
     97	return ksys_fallocate(fd, mode, ((loff_t)offset1 << 32) | offset2,
     98			     merge_64(len1, len2));
     99}
    100
    101asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long len1,
    102				 unsigned long len2)
    103{
    104	return ksys_ftruncate(fd, merge_64(len1, len2));
    105}
    106
    107long ppc32_fadvise64(int fd, u32 unused, u32 offset1, u32 offset2,
    108		     size_t len, int advice)
    109{
    110	return ksys_fadvise64_64(fd, merge_64(offset1, offset2), len,
    111				 advice);
    112}
    113
    114asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
    115				   unsigned offset1, unsigned offset2,
    116				   unsigned nbytes1, unsigned nbytes2)
    117{
    118	loff_t offset = merge_64(offset1, offset2);
    119	loff_t nbytes = merge_64(nbytes1, nbytes2);
    120
    121	return ksys_sync_file_range(fd, offset, nbytes, flags);
    122}