1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 21965aae3SH. Peter Anvin #ifndef _ASM_X86_COMPAT_H 31965aae3SH. Peter Anvin #define _ASM_X86_COMPAT_H 4bb898558SAl Viro 5bb898558SAl Viro /* 6bb898558SAl Viro * Architecture specific compatibility types 7bb898558SAl Viro */ 8bb898558SAl Viro #include <linux/types.h> 9bb898558SAl Viro #include <linux/sched.h> 10d375cf15SAndy Lutomirski #include <linux/sched/task_stack.h> 11d1a797f3SH. Peter Anvin #include <asm/processor.h> 12bb898558SAl Viro #include <asm/user32.h> 13fca460f9SH. Peter Anvin #include <asm/unistd.h> 14bb898558SAl Viro 15bb898558SAl Viro #define COMPAT_USER_HZ 100 16e28cbf22SChristoph Hellwig #define COMPAT_UTS_MACHINE "i686\0\0" 17bb898558SAl Viro 18bb898558SAl Viro typedef u32 compat_size_t; 19bb898558SAl Viro typedef s32 compat_ssize_t; 20bb898558SAl Viro typedef s32 compat_time_t; 21bb898558SAl Viro typedef s32 compat_clock_t; 22bb898558SAl Viro typedef s32 compat_pid_t; 23bb898558SAl Viro typedef u16 __compat_uid_t; 24bb898558SAl Viro typedef u16 __compat_gid_t; 25bb898558SAl Viro typedef u32 __compat_uid32_t; 26bb898558SAl Viro typedef u32 __compat_gid32_t; 27bb898558SAl Viro typedef u16 compat_mode_t; 28bb898558SAl Viro typedef u32 compat_ino_t; 29bb898558SAl Viro typedef u16 compat_dev_t; 30bb898558SAl Viro typedef s32 compat_off_t; 31bb898558SAl Viro typedef s64 compat_loff_t; 32bb898558SAl Viro typedef u16 compat_nlink_t; 33bb898558SAl Viro typedef u16 compat_ipc_pid_t; 34bb898558SAl Viro typedef s32 compat_daddr_t; 35bb898558SAl Viro typedef u32 compat_caddr_t; 36bb898558SAl Viro typedef __kernel_fsid_t compat_fsid_t; 37bb898558SAl Viro typedef s32 compat_timer_t; 38bb898558SAl Viro typedef s32 compat_key_t; 39bb898558SAl Viro 40bb898558SAl Viro typedef s32 compat_int_t; 41bb898558SAl Viro typedef s32 compat_long_t; 42bb898558SAl Viro typedef s64 __attribute__((aligned(4))) compat_s64; 43bb898558SAl Viro typedef u32 compat_uint_t; 44bb898558SAl Viro typedef u32 compat_ulong_t; 45a4455082SDave Hansen typedef u32 compat_u32; 46bb898558SAl Viro typedef u64 __attribute__((aligned(4))) compat_u64; 47751f409dSDenys Vlasenko typedef u32 compat_uptr_t; 48bb898558SAl Viro 49bb898558SAl Viro struct compat_timespec { 50bb898558SAl Viro compat_time_t tv_sec; 51bb898558SAl Viro s32 tv_nsec; 52bb898558SAl Viro }; 53bb898558SAl Viro 54bb898558SAl Viro struct compat_timeval { 55bb898558SAl Viro compat_time_t tv_sec; 56bb898558SAl Viro s32 tv_usec; 57bb898558SAl Viro }; 58bb898558SAl Viro 59bb898558SAl Viro struct compat_stat { 60bb898558SAl Viro compat_dev_t st_dev; 61bb898558SAl Viro u16 __pad1; 62bb898558SAl Viro compat_ino_t st_ino; 63bb898558SAl Viro compat_mode_t st_mode; 64bb898558SAl Viro compat_nlink_t st_nlink; 65bb898558SAl Viro __compat_uid_t st_uid; 66bb898558SAl Viro __compat_gid_t st_gid; 67bb898558SAl Viro compat_dev_t st_rdev; 68bb898558SAl Viro u16 __pad2; 69bb898558SAl Viro u32 st_size; 70bb898558SAl Viro u32 st_blksize; 71bb898558SAl Viro u32 st_blocks; 72bb898558SAl Viro u32 st_atime; 73bb898558SAl Viro u32 st_atime_nsec; 74bb898558SAl Viro u32 st_mtime; 75bb898558SAl Viro u32 st_mtime_nsec; 76bb898558SAl Viro u32 st_ctime; 77bb898558SAl Viro u32 st_ctime_nsec; 78bb898558SAl Viro u32 __unused4; 79bb898558SAl Viro u32 __unused5; 80bb898558SAl Viro }; 81bb898558SAl Viro 82bb898558SAl Viro struct compat_flock { 83bb898558SAl Viro short l_type; 84bb898558SAl Viro short l_whence; 85bb898558SAl Viro compat_off_t l_start; 86bb898558SAl Viro compat_off_t l_len; 87bb898558SAl Viro compat_pid_t l_pid; 88bb898558SAl Viro }; 89bb898558SAl Viro 90bb898558SAl Viro #define F_GETLK64 12 /* using 'struct flock64' */ 91bb898558SAl Viro #define F_SETLK64 13 92bb898558SAl Viro #define F_SETLKW64 14 93bb898558SAl Viro 94bb898558SAl Viro /* 95bb898558SAl Viro * IA32 uses 4 byte alignment for 64 bit quantities, 96bb898558SAl Viro * so we need to pack this structure. 97bb898558SAl Viro */ 98bb898558SAl Viro struct compat_flock64 { 99bb898558SAl Viro short l_type; 100bb898558SAl Viro short l_whence; 101bb898558SAl Viro compat_loff_t l_start; 102bb898558SAl Viro compat_loff_t l_len; 103bb898558SAl Viro compat_pid_t l_pid; 104bb898558SAl Viro } __attribute__((packed)); 105bb898558SAl Viro 106bb898558SAl Viro struct compat_statfs { 107bb898558SAl Viro int f_type; 108bb898558SAl Viro int f_bsize; 109bb898558SAl Viro int f_blocks; 110bb898558SAl Viro int f_bfree; 111bb898558SAl Viro int f_bavail; 112bb898558SAl Viro int f_files; 113bb898558SAl Viro int f_ffree; 114bb898558SAl Viro compat_fsid_t f_fsid; 115bb898558SAl Viro int f_namelen; /* SunOS ignores this field. */ 116bb898558SAl Viro int f_frsize; 1171448c721SEric W. Biederman int f_flags; 1181448c721SEric W. Biederman int f_spare[4]; 119bb898558SAl Viro }; 120bb898558SAl Viro 121bb898558SAl Viro #define COMPAT_RLIM_INFINITY 0xffffffff 122bb898558SAl Viro 123bb898558SAl Viro typedef u32 compat_old_sigset_t; /* at least 32 bits */ 124bb898558SAl Viro 125bb898558SAl Viro #define _COMPAT_NSIG 64 126bb898558SAl Viro #define _COMPAT_NSIG_BPW 32 127bb898558SAl Viro 128bb898558SAl Viro typedef u32 compat_sigset_word; 129bb898558SAl Viro 130bb898558SAl Viro #define COMPAT_OFF_T_MAX 0x7fffffff 131bb898558SAl Viro 132bb898558SAl Viro struct compat_ipc64_perm { 133bb898558SAl Viro compat_key_t key; 134bb898558SAl Viro __compat_uid32_t uid; 135bb898558SAl Viro __compat_gid32_t gid; 136bb898558SAl Viro __compat_uid32_t cuid; 137bb898558SAl Viro __compat_gid32_t cgid; 138bb898558SAl Viro unsigned short mode; 139bb898558SAl Viro unsigned short __pad1; 140bb898558SAl Viro unsigned short seq; 141bb898558SAl Viro unsigned short __pad2; 142bb898558SAl Viro compat_ulong_t unused1; 143bb898558SAl Viro compat_ulong_t unused2; 144bb898558SAl Viro }; 145bb898558SAl Viro 146bb898558SAl Viro struct compat_semid64_ds { 147bb898558SAl Viro struct compat_ipc64_perm sem_perm; 148bb898558SAl Viro compat_time_t sem_otime; 149bb898558SAl Viro compat_ulong_t __unused1; 150bb898558SAl Viro compat_time_t sem_ctime; 151bb898558SAl Viro compat_ulong_t __unused2; 152bb898558SAl Viro compat_ulong_t sem_nsems; 153bb898558SAl Viro compat_ulong_t __unused3; 154bb898558SAl Viro compat_ulong_t __unused4; 155bb898558SAl Viro }; 156bb898558SAl Viro 157bb898558SAl Viro struct compat_msqid64_ds { 158bb898558SAl Viro struct compat_ipc64_perm msg_perm; 159bb898558SAl Viro compat_time_t msg_stime; 160bb898558SAl Viro compat_ulong_t __unused1; 161bb898558SAl Viro compat_time_t msg_rtime; 162bb898558SAl Viro compat_ulong_t __unused2; 163bb898558SAl Viro compat_time_t msg_ctime; 164bb898558SAl Viro compat_ulong_t __unused3; 165bb898558SAl Viro compat_ulong_t msg_cbytes; 166bb898558SAl Viro compat_ulong_t msg_qnum; 167bb898558SAl Viro compat_ulong_t msg_qbytes; 168bb898558SAl Viro compat_pid_t msg_lspid; 169bb898558SAl Viro compat_pid_t msg_lrpid; 170bb898558SAl Viro compat_ulong_t __unused4; 171bb898558SAl Viro compat_ulong_t __unused5; 172bb898558SAl Viro }; 173bb898558SAl Viro 174bb898558SAl Viro struct compat_shmid64_ds { 175bb898558SAl Viro struct compat_ipc64_perm shm_perm; 176bb898558SAl Viro compat_size_t shm_segsz; 177bb898558SAl Viro compat_time_t shm_atime; 178bb898558SAl Viro compat_ulong_t __unused1; 179bb898558SAl Viro compat_time_t shm_dtime; 180bb898558SAl Viro compat_ulong_t __unused2; 181bb898558SAl Viro compat_time_t shm_ctime; 182bb898558SAl Viro compat_ulong_t __unused3; 183bb898558SAl Viro compat_pid_t shm_cpid; 184bb898558SAl Viro compat_pid_t shm_lpid; 185bb898558SAl Viro compat_ulong_t shm_nattch; 186bb898558SAl Viro compat_ulong_t __unused4; 187bb898558SAl Viro compat_ulong_t __unused5; 188bb898558SAl Viro }; 189bb898558SAl Viro 190bb898558SAl Viro /* 191bb898558SAl Viro * The type of struct elf_prstatus.pr_reg in compatible core dumps. 192bb898558SAl Viro */ 193d1a797f3SH. Peter Anvin typedef struct user_regs_struct compat_elf_gregset_t; 194d1a797f3SH. Peter Anvin 19590954e7bSDmitry Safonov /* Full regset -- prstatus on x32, otherwise on ia32 */ 19690954e7bSDmitry Safonov #define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296) 19790954e7bSDmitry Safonov #define SET_PR_FPVALID(S, V, R) \ 19890954e7bSDmitry Safonov do { *(int *) (((void *) &((S)->pr_reg)) + R) = (V); } \ 199d1a797f3SH. Peter Anvin while (0) 200d1a797f3SH. Peter Anvin 2017b2dd368SDmitry Safonov #ifdef CONFIG_X86_X32_ABI 202d1a797f3SH. Peter Anvin #define COMPAT_USE_64BIT_TIME \ 203d1a797f3SH. Peter Anvin (!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)) 204d1a797f3SH. Peter Anvin #endif 205bb898558SAl Viro 206bb898558SAl Viro /* 207bb898558SAl Viro * A pointer passed in from user mode. This should not 208bb898558SAl Viro * be used for syscall parameters, just declare them 209bb898558SAl Viro * as pointers because the syscall entry code will have 210bb898558SAl Viro * appropriately converted them already. 211bb898558SAl Viro */ 212bb898558SAl Viro 213bb898558SAl Viro static inline void __user *compat_ptr(compat_uptr_t uptr) 214bb898558SAl Viro { 215bb898558SAl Viro return (void __user *)(unsigned long)uptr; 216bb898558SAl Viro } 217bb898558SAl Viro 218bb898558SAl Viro static inline compat_uptr_t ptr_to_compat(void __user *uptr) 219bb898558SAl Viro { 220bb898558SAl Viro return (u32)(unsigned long)uptr; 221bb898558SAl Viro } 222bb898558SAl Viro 223c41d68a5SH. Peter Anvin static inline void __user *arch_compat_alloc_user_space(long len) 224bb898558SAl Viro { 225d1a797f3SH. Peter Anvin compat_uptr_t sp; 226d1a797f3SH. Peter Anvin 227d1a797f3SH. Peter Anvin if (test_thread_flag(TIF_IA32)) { 228d1a797f3SH. Peter Anvin sp = task_pt_regs(current)->sp; 229d1a797f3SH. Peter Anvin } else { 230d1a797f3SH. Peter Anvin /* -128 for the x32 ABI redzone */ 231263042e4SDenys Vlasenko sp = task_pt_regs(current)->sp - 128; 232d1a797f3SH. Peter Anvin } 233d1a797f3SH. Peter Anvin 234d1a797f3SH. Peter Anvin return (void __user *)round_down(sp - len, 16); 235bb898558SAl Viro } 236bb898558SAl Viro 237abfb9498SDmitry Safonov static inline bool in_x32_syscall(void) 238a628b684SH. Peter Anvin { 239fca460f9SH. Peter Anvin #ifdef CONFIG_X86_X32_ABI 240fca460f9SH. Peter Anvin if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT) 241fca460f9SH. Peter Anvin return true; 242fca460f9SH. Peter Anvin #endif 243fca460f9SH. Peter Anvin return false; 244bb898558SAl Viro } 245bb898558SAl Viro 246f970165bSAndy Lutomirski static inline bool in_compat_syscall(void) 247a628b684SH. Peter Anvin { 248abfb9498SDmitry Safonov return in_ia32_syscall() || in_x32_syscall(); 249a628b684SH. Peter Anvin } 250f970165bSAndy Lutomirski #define in_compat_syscall in_compat_syscall /* override the generic impl */ 251a628b684SH. Peter Anvin 252ea64d5acSEric W. Biederman struct compat_siginfo; 253ea64d5acSEric W. Biederman int __copy_siginfo_to_user32(struct compat_siginfo __user *to, 254ea64d5acSEric W. Biederman const siginfo_t *from, bool x32_ABI); 255ea64d5acSEric W. Biederman 2561965aae3SH. Peter Anvin #endif /* _ASM_X86_COMPAT_H */ 257