335 lines
7.4 KiB
C
335 lines
7.4 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_COMPAT_H
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#define _ASM_X86_COMPAT_H
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/*
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* Architecture specific compatibility types
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*/
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/sched/task_stack.h>
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#include <asm/processor.h>
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#include <asm/user32.h>
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#include <asm/unistd.h>
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#define COMPAT_USER_HZ 100
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#define COMPAT_UTS_MACHINE "i686\0\0"
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typedef u32 compat_size_t;
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typedef s32 compat_ssize_t;
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typedef s32 compat_time_t;
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typedef s32 compat_clock_t;
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typedef s32 compat_pid_t;
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typedef u16 __compat_uid_t;
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typedef u16 __compat_gid_t;
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typedef u32 __compat_uid32_t;
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typedef u32 __compat_gid32_t;
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typedef u16 compat_mode_t;
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typedef u32 compat_ino_t;
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typedef u16 compat_dev_t;
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typedef s32 compat_off_t;
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typedef s64 compat_loff_t;
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typedef u16 compat_nlink_t;
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typedef u16 compat_ipc_pid_t;
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typedef s32 compat_daddr_t;
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typedef u32 compat_caddr_t;
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typedef __kernel_fsid_t compat_fsid_t;
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typedef s32 compat_timer_t;
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typedef s32 compat_key_t;
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typedef s32 compat_int_t;
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typedef s32 compat_long_t;
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typedef s64 __attribute__((aligned(4))) compat_s64;
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typedef u32 compat_uint_t;
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typedef u32 compat_ulong_t;
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typedef u32 compat_u32;
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typedef u64 __attribute__((aligned(4))) compat_u64;
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typedef u32 compat_uptr_t;
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struct compat_timespec {
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compat_time_t tv_sec;
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s32 tv_nsec;
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};
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struct compat_timeval {
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compat_time_t tv_sec;
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s32 tv_usec;
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};
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struct compat_stat {
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compat_dev_t st_dev;
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u16 __pad1;
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compat_ino_t st_ino;
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compat_mode_t st_mode;
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compat_nlink_t st_nlink;
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__compat_uid_t st_uid;
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__compat_gid_t st_gid;
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compat_dev_t st_rdev;
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u16 __pad2;
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u32 st_size;
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u32 st_blksize;
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u32 st_blocks;
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u32 st_atime;
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u32 st_atime_nsec;
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u32 st_mtime;
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u32 st_mtime_nsec;
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u32 st_ctime;
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u32 st_ctime_nsec;
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u32 __unused4;
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u32 __unused5;
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};
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struct compat_flock {
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short l_type;
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short l_whence;
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compat_off_t l_start;
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compat_off_t l_len;
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compat_pid_t l_pid;
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};
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#define F_GETLK64 12 /* using 'struct flock64' */
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#define F_SETLK64 13
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#define F_SETLKW64 14
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/*
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* IA32 uses 4 byte alignment for 64 bit quantities,
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* so we need to pack this structure.
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*/
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struct compat_flock64 {
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short l_type;
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short l_whence;
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compat_loff_t l_start;
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compat_loff_t l_len;
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compat_pid_t l_pid;
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} __attribute__((packed));
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struct compat_statfs {
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int f_type;
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int f_bsize;
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int f_blocks;
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int f_bfree;
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int f_bavail;
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int f_files;
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int f_ffree;
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compat_fsid_t f_fsid;
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int f_namelen; /* SunOS ignores this field. */
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int f_frsize;
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int f_flags;
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int f_spare[4];
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};
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#define COMPAT_RLIM_INFINITY 0xffffffff
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typedef u32 compat_old_sigset_t; /* at least 32 bits */
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#define _COMPAT_NSIG 64
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#define _COMPAT_NSIG_BPW 32
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typedef u32 compat_sigset_word;
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typedef union compat_sigval {
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compat_int_t sival_int;
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compat_uptr_t sival_ptr;
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} compat_sigval_t;
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typedef struct compat_siginfo {
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int si_signo;
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int si_errno;
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int si_code;
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union {
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int _pad[128/sizeof(int) - 3];
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/* kill() */
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struct {
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unsigned int _pid; /* sender's pid */
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unsigned int _uid; /* sender's uid */
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} _kill;
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/* POSIX.1b timers */
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struct {
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compat_timer_t _tid; /* timer id */
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int _overrun; /* overrun count */
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compat_sigval_t _sigval; /* same as below */
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int _sys_private; /* not to be passed to user */
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int _overrun_incr; /* amount to add to overrun */
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} _timer;
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/* POSIX.1b signals */
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struct {
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unsigned int _pid; /* sender's pid */
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unsigned int _uid; /* sender's uid */
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compat_sigval_t _sigval;
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} _rt;
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/* SIGCHLD */
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struct {
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unsigned int _pid; /* which child */
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unsigned int _uid; /* sender's uid */
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int _status; /* exit code */
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compat_clock_t _utime;
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compat_clock_t _stime;
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} _sigchld;
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/* SIGCHLD (x32 version) */
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struct {
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unsigned int _pid; /* which child */
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unsigned int _uid; /* sender's uid */
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int _status; /* exit code */
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compat_s64 _utime;
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compat_s64 _stime;
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} _sigchld_x32;
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/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
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struct {
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unsigned int _addr; /* faulting insn/memory ref. */
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short int _addr_lsb; /* Valid LSB of the reported address. */
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union {
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/* used when si_code=SEGV_BNDERR */
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struct {
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compat_uptr_t _lower;
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compat_uptr_t _upper;
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} _addr_bnd;
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/* used when si_code=SEGV_PKUERR */
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compat_u32 _pkey;
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};
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} _sigfault;
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/* SIGPOLL */
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struct {
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int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
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int _fd;
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} _sigpoll;
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struct {
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unsigned int _call_addr; /* calling insn */
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int _syscall; /* triggering system call number */
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unsigned int _arch; /* AUDIT_ARCH_* of syscall */
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} _sigsys;
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} _sifields;
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} compat_siginfo_t;
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#define COMPAT_OFF_T_MAX 0x7fffffff
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struct compat_ipc64_perm {
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compat_key_t key;
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__compat_uid32_t uid;
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__compat_gid32_t gid;
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__compat_uid32_t cuid;
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__compat_gid32_t cgid;
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unsigned short mode;
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unsigned short __pad1;
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unsigned short seq;
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unsigned short __pad2;
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compat_ulong_t unused1;
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compat_ulong_t unused2;
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};
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struct compat_semid64_ds {
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struct compat_ipc64_perm sem_perm;
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compat_time_t sem_otime;
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compat_ulong_t __unused1;
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compat_time_t sem_ctime;
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compat_ulong_t __unused2;
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compat_ulong_t sem_nsems;
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compat_ulong_t __unused3;
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compat_ulong_t __unused4;
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};
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struct compat_msqid64_ds {
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struct compat_ipc64_perm msg_perm;
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compat_time_t msg_stime;
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compat_ulong_t __unused1;
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compat_time_t msg_rtime;
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compat_ulong_t __unused2;
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compat_time_t msg_ctime;
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compat_ulong_t __unused3;
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compat_ulong_t msg_cbytes;
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compat_ulong_t msg_qnum;
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compat_ulong_t msg_qbytes;
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compat_pid_t msg_lspid;
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compat_pid_t msg_lrpid;
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compat_ulong_t __unused4;
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compat_ulong_t __unused5;
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};
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struct compat_shmid64_ds {
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struct compat_ipc64_perm shm_perm;
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compat_size_t shm_segsz;
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compat_time_t shm_atime;
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compat_ulong_t __unused1;
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compat_time_t shm_dtime;
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compat_ulong_t __unused2;
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compat_time_t shm_ctime;
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compat_ulong_t __unused3;
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compat_pid_t shm_cpid;
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compat_pid_t shm_lpid;
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compat_ulong_t shm_nattch;
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compat_ulong_t __unused4;
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compat_ulong_t __unused5;
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};
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/*
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* The type of struct elf_prstatus.pr_reg in compatible core dumps.
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*/
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typedef struct user_regs_struct compat_elf_gregset_t;
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/* Full regset -- prstatus on x32, otherwise on ia32 */
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#define PRSTATUS_SIZE(S, R) (R != sizeof(S.pr_reg) ? 144 : 296)
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#define SET_PR_FPVALID(S, V, R) \
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do { *(int *) (((void *) &((S)->pr_reg)) + R) = (V); } \
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while (0)
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#ifdef CONFIG_X86_X32_ABI
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#define COMPAT_USE_64BIT_TIME \
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(!!(task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT))
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#endif
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/*
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* A pointer passed in from user mode. This should not
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* be used for syscall parameters, just declare them
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* as pointers because the syscall entry code will have
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* appropriately converted them already.
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*/
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static inline void __user *compat_ptr(compat_uptr_t uptr)
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{
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return (void __user *)(unsigned long)uptr;
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}
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static inline compat_uptr_t ptr_to_compat(void __user *uptr)
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{
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return (u32)(unsigned long)uptr;
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}
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static inline void __user *arch_compat_alloc_user_space(long len)
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{
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compat_uptr_t sp;
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if (test_thread_flag(TIF_IA32)) {
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sp = task_pt_regs(current)->sp;
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} else {
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/* -128 for the x32 ABI redzone */
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sp = task_pt_regs(current)->sp - 128;
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}
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return (void __user *)round_down(sp - len, 16);
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}
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static inline bool in_x32_syscall(void)
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{
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#ifdef CONFIG_X86_X32_ABI
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if (task_pt_regs(current)->orig_ax & __X32_SYSCALL_BIT)
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return true;
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#endif
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return false;
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}
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static inline bool in_compat_syscall(void)
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{
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return in_ia32_syscall() || in_x32_syscall();
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}
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#define in_compat_syscall in_compat_syscall /* override the generic impl */
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#endif /* _ASM_X86_COMPAT_H */
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