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4725c86055
The FPC_VALID_MASK has been used to check the validity of the value to be loaded into the floating-point-control register. With the introduction of the floating-point extension facility and the decimal-floating-point additional bits have been defined which need to be checked in a non straight forward way. So far these bits have been ignored which can cause an incorrect results for decimal- floating-point operations, e.g. an incorrect rounding mode to be set after signal return. The static check with the FPC_VALID_MASK is replaced with a trial load of the floating-point-control value, see test_fp_ctl. In addition an information leak with the padding word between the floating-point-control word and the floating-point registers in the s390_fp_regs is fixed. Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
122 lines
3.8 KiB
C
122 lines
3.8 KiB
C
#ifndef _ASM_S390X_S390_H
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#define _ASM_S390X_S390_H
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#include <linux/compat.h>
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#include <linux/socket.h>
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#include <linux/syscalls.h>
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/* Macro that masks the high order bit of an 32 bit pointer and converts it*/
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/* to a 64 bit pointer */
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#define A(__x) ((unsigned long)((__x) & 0x7FFFFFFFUL))
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#define AA(__x) \
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((unsigned long)(__x))
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/* Now 32bit compatibility types */
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struct ipc_kludge_32 {
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__u32 msgp; /* pointer */
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__s32 msgtyp;
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};
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/* asm/sigcontext.h */
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typedef union
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{
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__u64 d;
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__u32 f;
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} freg_t32;
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typedef struct
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{
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unsigned int fpc;
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unsigned int pad;
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freg_t32 fprs[__NUM_FPRS];
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} _s390_fp_regs32;
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typedef struct
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{
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__u32 mask;
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__u32 addr;
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} _psw_t32 __attribute__ ((aligned(8)));
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typedef struct
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{
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_psw_t32 psw;
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__u32 gprs[__NUM_GPRS];
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__u32 acrs[__NUM_ACRS];
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} _s390_regs_common32;
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typedef struct
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{
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_s390_regs_common32 regs;
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_s390_fp_regs32 fpregs;
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} _sigregs32;
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#define _SIGCONTEXT_NSIG32 64
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#define _SIGCONTEXT_NSIG_BPW32 32
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#define __SIGNAL_FRAMESIZE32 96
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#define _SIGMASK_COPY_SIZE32 (sizeof(u32)*2)
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struct sigcontext32
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{
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__u32 oldmask[_COMPAT_NSIG_WORDS];
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__u32 sregs; /* pointer */
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};
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/* asm/signal.h */
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/* asm/ucontext.h */
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struct ucontext32 {
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__u32 uc_flags;
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__u32 uc_link; /* pointer */
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compat_stack_t uc_stack;
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_sigregs32 uc_mcontext;
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compat_sigset_t uc_sigmask; /* mask last for extensibility */
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};
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struct stat64_emu31;
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struct mmap_arg_struct_emu31;
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struct fadvise64_64_args;
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long sys32_chown16(const char __user * filename, u16 user, u16 group);
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long sys32_lchown16(const char __user * filename, u16 user, u16 group);
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long sys32_fchown16(unsigned int fd, u16 user, u16 group);
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long sys32_setregid16(u16 rgid, u16 egid);
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long sys32_setgid16(u16 gid);
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long sys32_setreuid16(u16 ruid, u16 euid);
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long sys32_setuid16(u16 uid);
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long sys32_setresuid16(u16 ruid, u16 euid, u16 suid);
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long sys32_getresuid16(u16 __user *ruid, u16 __user *euid, u16 __user *suid);
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long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid);
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long sys32_getresgid16(u16 __user *rgid, u16 __user *egid, u16 __user *sgid);
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long sys32_setfsuid16(u16 uid);
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long sys32_setfsgid16(u16 gid);
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long sys32_getgroups16(int gidsetsize, u16 __user *grouplist);
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long sys32_setgroups16(int gidsetsize, u16 __user *grouplist);
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long sys32_getuid16(void);
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long sys32_geteuid16(void);
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long sys32_getgid16(void);
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long sys32_getegid16(void);
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long sys32_truncate64(const char __user * path, unsigned long high,
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unsigned long low);
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long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low);
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long sys32_init_module(void __user *umod, unsigned long len,
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const char __user *uargs);
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long sys32_delete_module(const char __user *name_user, unsigned int flags);
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long sys32_pread64(unsigned int fd, char __user *ubuf, size_t count,
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u32 poshi, u32 poslo);
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long sys32_pwrite64(unsigned int fd, const char __user *ubuf,
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size_t count, u32 poshi, u32 poslo);
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compat_ssize_t sys32_readahead(int fd, u32 offhi, u32 offlo, s32 count);
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long sys32_stat64(const char __user * filename, struct stat64_emu31 __user * statbuf);
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long sys32_lstat64(const char __user * filename,
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struct stat64_emu31 __user * statbuf);
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long sys32_fstat64(unsigned long fd, struct stat64_emu31 __user * statbuf);
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long sys32_fstatat64(unsigned int dfd, const char __user *filename,
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struct stat64_emu31 __user* statbuf, int flag);
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unsigned long old32_mmap(struct mmap_arg_struct_emu31 __user *arg);
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long sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg);
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long sys32_read(unsigned int fd, char __user * buf, size_t count);
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long sys32_write(unsigned int fd, const char __user * buf, size_t count);
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long sys32_fadvise64(int fd, loff_t offset, size_t len, int advise);
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long sys32_fadvise64_64(struct fadvise64_64_args __user *args);
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#endif /* _ASM_S390X_S390_H */
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