forked from Minki/linux
9a205286bc
Enforce 32 bit types for all compat syscall argument types.
This way we can make sure that all arguments get correct sign
or zero extension. Otherwise incorrect code would be generated.
E.g. for a 'long' type the COMPAT_SYSCALL_DEFINE macro wouldn't
generate code that would cause sign extension of the passed in 32
bit user space parameter.
This can cause quite subtle bugs like e.g. the one that was fixed
with dfd948e32a "fs/compat: fix parameter handling for compat
readv/writev syscalls".
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
360 lines
7.9 KiB
C
360 lines
7.9 KiB
C
#ifndef _ASM_S390X_COMPAT_H
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#define _ASM_S390X_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/thread_info.h>
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#define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p(typeof(0?(t)0:0ULL), u64))
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#define __SC_DELOUSE(t,v) ({ \
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BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
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(t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \
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})
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#define PSW32_MASK_PER 0x40000000UL
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#define PSW32_MASK_DAT 0x04000000UL
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#define PSW32_MASK_IO 0x02000000UL
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#define PSW32_MASK_EXT 0x01000000UL
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#define PSW32_MASK_KEY 0x00F00000UL
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#define PSW32_MASK_BASE 0x00080000UL /* Always one */
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#define PSW32_MASK_MCHECK 0x00040000UL
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#define PSW32_MASK_WAIT 0x00020000UL
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#define PSW32_MASK_PSTATE 0x00010000UL
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#define PSW32_MASK_ASC 0x0000C000UL
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#define PSW32_MASK_CC 0x00003000UL
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#define PSW32_MASK_PM 0x00000f00UL
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#define PSW32_MASK_RI 0x00000080UL
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#define PSW32_MASK_USER 0x0000FF00UL
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#define PSW32_ADDR_AMODE 0x80000000UL
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#define PSW32_ADDR_INSN 0x7FFFFFFFUL
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#define PSW32_DEFAULT_KEY (((u32) PAGE_DEFAULT_ACC) << 20)
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#define PSW32_ASC_PRIMARY 0x00000000UL
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#define PSW32_ASC_ACCREG 0x00004000UL
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#define PSW32_ASC_SECONDARY 0x00008000UL
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#define PSW32_ASC_HOME 0x0000C000UL
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#define PSW32_USER_BITS (PSW32_MASK_DAT | PSW32_MASK_IO | PSW32_MASK_EXT | \
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PSW32_DEFAULT_KEY | PSW32_MASK_BASE | \
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PSW32_MASK_MCHECK | PSW32_MASK_PSTATE | \
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PSW32_ASC_PRIMARY)
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#define COMPAT_USER_HZ 100
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#define COMPAT_UTS_MACHINE "s390\0\0\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_key_t;
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typedef s32 compat_timer_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 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 u64 compat_u64;
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typedef u32 compat_uptr_t;
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typedef struct {
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u32 mask;
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u32 addr;
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} __aligned(8) psw_compat_t;
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typedef struct {
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psw_compat_t psw;
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u32 gprs[NUM_GPRS];
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u32 acrs[NUM_ACRS];
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u32 orig_gpr2;
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} s390_compat_regs;
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typedef struct {
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u32 gprs_high[NUM_GPRS];
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} s390_compat_regs_high;
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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
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#define F_SETLK64 13
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#define F_SETLKW64 14
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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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};
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struct compat_statfs {
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u32 f_type;
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u32 f_bsize;
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u32 f_blocks;
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u32 f_bfree;
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u32 f_bavail;
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u32 f_files;
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u32 f_ffree;
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compat_fsid_t f_fsid;
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u32 f_namelen;
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u32 f_frsize;
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u32 f_flags;
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u32 f_spare[4];
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};
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struct compat_statfs64 {
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u32 f_type;
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u32 f_bsize;
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u64 f_blocks;
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u64 f_bfree;
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u64 f_bavail;
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u64 f_files;
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u64 f_ffree;
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compat_fsid_t f_fsid;
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u32 f_namelen;
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u32 f_frsize;
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u32 f_flags;
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u32 f_spare[4];
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};
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#define COMPAT_RLIM_OLD_INFINITY 0x7fffffff
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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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pid_t _pid; /* sender's pid */
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uid_t _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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} _timer;
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/* POSIX.1b signals */
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struct {
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pid_t _pid; /* sender's pid */
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uid_t _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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pid_t _pid; /* which child */
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uid_t _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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/* SIGILL, SIGFPE, SIGSEGV, SIGBUS */
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struct {
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__u32 _addr; /* faulting insn/memory ref. - pointer */
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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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} _sifields;
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} compat_siginfo_t;
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/*
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* How these fields are to be accessed.
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*/
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#define si_pid _sifields._kill._pid
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#define si_uid _sifields._kill._uid
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#define si_status _sifields._sigchld._status
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#define si_utime _sifields._sigchld._utime
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#define si_stime _sifields._sigchld._stime
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#define si_value _sifields._rt._sigval
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#define si_int _sifields._rt._sigval.sival_int
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#define si_ptr _sifields._rt._sigval.sival_ptr
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#define si_addr _sifields._sigfault._addr
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#define si_band _sifields._sigpoll._band
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#define si_fd _sifields._sigpoll._fd
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#define si_tid _sifields._timer._tid
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#define si_overrun _sifields._timer._overrun
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#define COMPAT_OFF_T_MAX 0x7fffffff
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#define COMPAT_LOFF_T_MAX 0x7fffffffffffffffL
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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 & 0x7fffffffUL);
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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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#ifdef CONFIG_COMPAT
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static inline int is_compat_task(void)
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{
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return is_32bit_task();
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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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unsigned long stack;
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stack = KSTK_ESP(current);
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if (is_compat_task())
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stack &= 0x7fffffffUL;
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return (void __user *) (stack - len);
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}
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#endif
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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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compat_mode_t 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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unsigned int __unused1;
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unsigned int __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 __pad1;
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compat_time_t sem_ctime;
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compat_ulong_t __pad2;
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compat_ulong_t sem_nsems;
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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_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 __pad1;
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compat_time_t msg_rtime;
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compat_ulong_t __pad2;
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compat_time_t msg_ctime;
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compat_ulong_t __pad3;
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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 __unused1;
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compat_ulong_t __unused2;
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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 __pad1;
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compat_time_t shm_dtime;
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compat_ulong_t __pad2;
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compat_time_t shm_ctime;
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compat_ulong_t __pad3;
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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 __unused1;
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compat_ulong_t __unused2;
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};
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#endif /* _ASM_S390X_COMPAT_H */
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