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 51 unsigned 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 71 compat_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 77 compat_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 83 compat_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 88 asmlinkage 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 94 asmlinkage 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 } 100 101 asmlinkage 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 } 106 107 long 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 } 113 114 asmlinkage 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 } 123