1 /* 2 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls. 3 * 4 * Copyright (C) 2001 IBM 5 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) 6 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) 7 * 8 * These routines maintain argument size conversion between 32bit and 64bit 9 * environment. 10 * 11 * This program is free software; you can redistribute it and/or 12 * modify it under the terms of the GNU General Public License 13 * as published by the Free Software Foundation; either version 14 * 2 of the License, or (at your option) any later version. 15 */ 16 17 #include <linux/kernel.h> 18 #include <linux/sched.h> 19 #include <linux/fs.h> 20 #include <linux/mm.h> 21 #include <linux/file.h> 22 #include <linux/signal.h> 23 #include <linux/resource.h> 24 #include <linux/times.h> 25 #include <linux/smp.h> 26 #include <linux/sem.h> 27 #include <linux/msg.h> 28 #include <linux/shm.h> 29 #include <linux/poll.h> 30 #include <linux/personality.h> 31 #include <linux/stat.h> 32 #include <linux/mman.h> 33 #include <linux/in.h> 34 #include <linux/syscalls.h> 35 #include <linux/unistd.h> 36 #include <linux/sysctl.h> 37 #include <linux/binfmts.h> 38 #include <linux/security.h> 39 #include <linux/compat.h> 40 #include <linux/ptrace.h> 41 #include <linux/elf.h> 42 #include <linux/ipc.h> 43 #include <linux/slab.h> 44 45 #include <asm/ptrace.h> 46 #include <asm/types.h> 47 #include <asm/uaccess.h> 48 #include <asm/unistd.h> 49 #include <asm/time.h> 50 #include <asm/mmu_context.h> 51 #include <asm/ppc-pci.h> 52 #include <asm/syscalls.h> 53 #include <asm/switch_to.h> 54 55 56 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp, 57 compat_ulong_t __user *outp, compat_ulong_t __user *exp, 58 compat_uptr_t tvp_x) 59 { 60 /* sign extend n */ 61 return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x)); 62 } 63 64 unsigned long compat_sys_mmap2(unsigned long addr, size_t len, 65 unsigned long prot, unsigned long flags, 66 unsigned long fd, unsigned long pgoff) 67 { 68 /* This should remain 12 even if PAGE_SIZE changes */ 69 return sys_mmap(addr, len, prot, flags, fd, pgoff << 12); 70 } 71 72 /* 73 * long long munging: 74 * The 32 bit ABI passes long longs in an odd even register pair. 75 */ 76 77 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count, 78 u32 reg6, u32 poshi, u32 poslo) 79 { 80 return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo); 81 } 82 83 compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count, 84 u32 reg6, u32 poshi, u32 poslo) 85 { 86 return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo); 87 } 88 89 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count) 90 { 91 return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count); 92 } 93 94 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4, 95 unsigned long high, unsigned long low) 96 { 97 return sys_truncate(path, (high << 32) | low); 98 } 99 100 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo, 101 u32 lenhi, u32 lenlo) 102 { 103 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo, 104 ((loff_t)lenhi << 32) | lenlo); 105 } 106 107 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high, 108 unsigned long low) 109 { 110 return sys_ftruncate(fd, (high << 32) | low); 111 } 112 113 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low, 114 size_t len, int advice) 115 { 116 return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len, 117 advice); 118 } 119 120 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags, 121 unsigned offset_hi, unsigned offset_lo, 122 unsigned nbytes_hi, unsigned nbytes_lo) 123 { 124 loff_t offset = ((loff_t)offset_hi << 32) | offset_lo; 125 loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo; 126 127 return sys_sync_file_range(fd, offset, nbytes, flags); 128 } 129