diff options
Diffstat (limited to 'arch/s390/kernel/compat_signal.c')
| -rw-r--r-- | arch/s390/kernel/compat_signal.c | 48 |
1 files changed, 14 insertions, 34 deletions
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c index fe8d6924efaa..eb4664238613 100644 --- a/arch/s390/kernel/compat_signal.c +++ b/arch/s390/kernel/compat_signal.c @@ -153,33 +153,14 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) /* Store registers needed to create the signal frame */ static void store_sigregs(void) { - int i; - save_access_regs(current->thread.acrs); - save_fp_ctl(¤t->thread.fp_regs.fpc); - if (current->thread.vxrs) { - save_vx_regs(current->thread.vxrs); - for (i = 0; i < __NUM_FPRS; i++) - current->thread.fp_regs.fprs[i] = - *(freg_t *)(current->thread.vxrs + i); - } else - save_fp_regs(current->thread.fp_regs.fprs); + save_fpu_regs(); } /* Load registers after signal return */ static void load_sigregs(void) { - int i; - restore_access_regs(current->thread.acrs); - /* restore_fp_ctl is done in restore_sigregs */ - if (current->thread.vxrs) { - for (i = 0; i < __NUM_FPRS; i++) - *(freg_t *)(current->thread.vxrs + i) = - current->thread.fp_regs.fprs[i]; - restore_vx_regs(current->thread.vxrs); - } else - restore_fp_regs(current->thread.fp_regs.fprs); } static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs) @@ -196,8 +177,7 @@ static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs) user_sregs.regs.gprs[i] = (__u32) regs->gprs[i]; memcpy(&user_sregs.regs.acrs, current->thread.acrs, sizeof(user_sregs.regs.acrs)); - memcpy(&user_sregs.fpregs, ¤t->thread.fp_regs, - sizeof(user_sregs.fpregs)); + fpregs_store((_s390_fp_regs *) &user_sregs.fpregs, ¤t->thread.fpu); if (__copy_to_user(sregs, &user_sregs, sizeof(_sigregs32))) return -EFAULT; return 0; @@ -217,8 +197,8 @@ static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs) if (!is_ri_task(current) && (user_sregs.regs.psw.mask & PSW32_MASK_RI)) return -EINVAL; - /* Loading the floating-point-control word can fail. Do that first. */ - if (restore_fp_ctl(&user_sregs.fpregs.fpc)) + /* Test the floating-point-control word. */ + if (test_fp_ctl(user_sregs.fpregs.fpc)) return -EINVAL; /* Use regs->psw.mask instead of PSW_USER_BITS to preserve PER bit. */ @@ -235,9 +215,7 @@ static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs) regs->gprs[i] = (__u64) user_sregs.regs.gprs[i]; memcpy(¤t->thread.acrs, &user_sregs.regs.acrs, sizeof(current->thread.acrs)); - - memcpy(¤t->thread.fp_regs, &user_sregs.fpregs, - sizeof(current->thread.fp_regs)); + fpregs_load((_s390_fp_regs *) &user_sregs.fpregs, ¤t->thread.fpu); clear_pt_regs_flag(regs, PIF_SYSCALL); /* No longer in a system call */ return 0; @@ -258,13 +236,13 @@ static int save_sigregs_ext32(struct pt_regs *regs, return -EFAULT; /* Save vector registers to signal stack */ - if (current->thread.vxrs) { + if (is_vx_task(current)) { for (i = 0; i < __NUM_VXRS_LOW; i++) - vxrs[i] = *((__u64 *)(current->thread.vxrs + i) + 1); + vxrs[i] = *((__u64 *)(current->thread.fpu.vxrs + i) + 1); if (__copy_to_user(&sregs_ext->vxrs_low, vxrs, sizeof(sregs_ext->vxrs_low)) || __copy_to_user(&sregs_ext->vxrs_high, - current->thread.vxrs + __NUM_VXRS_LOW, + current->thread.fpu.vxrs + __NUM_VXRS_LOW, sizeof(sregs_ext->vxrs_high))) return -EFAULT; } @@ -286,15 +264,15 @@ static int restore_sigregs_ext32(struct pt_regs *regs, *(__u32 *)®s->gprs[i] = gprs_high[i]; /* Restore vector registers from signal stack */ - if (current->thread.vxrs) { + if (is_vx_task(current)) { if (__copy_from_user(vxrs, &sregs_ext->vxrs_low, sizeof(sregs_ext->vxrs_low)) || - __copy_from_user(current->thread.vxrs + __NUM_VXRS_LOW, + __copy_from_user(current->thread.fpu.vxrs + __NUM_VXRS_LOW, &sregs_ext->vxrs_high, sizeof(sregs_ext->vxrs_high))) return -EFAULT; for (i = 0; i < __NUM_VXRS_LOW; i++) - *((__u64 *)(current->thread.vxrs + i) + 1) = vxrs[i]; + *((__u64 *)(current->thread.fpu.vxrs + i) + 1) = vxrs[i]; } return 0; } @@ -308,6 +286,7 @@ COMPAT_SYSCALL_DEFINE0(sigreturn) if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32)) goto badframe; set_current_blocked(&set); + save_fpu_regs(); if (restore_sigregs32(regs, &frame->sregs)) goto badframe; if (restore_sigregs_ext32(regs, &frame->sregs_ext)) @@ -330,6 +309,7 @@ COMPAT_SYSCALL_DEFINE0(rt_sigreturn) set_current_blocked(&set); if (compat_restore_altstack(&frame->uc.uc_stack)) goto badframe; + save_fpu_regs(); if (restore_sigregs32(regs, &frame->uc.uc_mcontext)) goto badframe; if (restore_sigregs_ext32(regs, &frame->uc.uc_mcontext_ext)) @@ -472,7 +452,7 @@ static int setup_rt_frame32(struct ksignal *ksig, sigset_t *set, */ uc_flags = UC_GPRS_HIGH; if (MACHINE_HAS_VX) { - if (current->thread.vxrs) + if (is_vx_task(current)) uc_flags |= UC_VXRS; } else frame_size -= sizeof(frame->uc.uc_mcontext_ext.vxrs_low) + |