s390/kernel/compat_signal.c

27 #include <asm/access-regs.h>
68 static int save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs)
73 	user_sregs.regs.psw.mask = (__u32)(regs->psw.mask >> 32);
74 	user_sregs.regs.psw.mask &= PSW32_MASK_USER | PSW32_MASK_RI;
75 	user_sregs.regs.psw.mask |= PSW32_USER_BITS;
76 	user_sregs.regs.psw.addr = (__u32) regs->psw.addr |
77 		(__u32)(regs->psw.mask & PSW_MASK_BA);
79 		user_sregs.regs.gprs[i] = (__u32) regs->gprs[i];
80 	memcpy(&user_sregs.regs.acrs, current->thread.acrs,
81 	       sizeof(user_sregs.regs.acrs));
88 static int restore_sigregs32(struct pt_regs *regs,_sigregs32 __user *sregs)
96 	if (__copy_from_user(&user_sregs, &sregs->regs, sizeof(user_sregs)))
99 	if (!is_ri_task(current) && (user_sregs.regs.psw.mask & PSW32_MASK_RI))
102 	/* Use regs->psw.mask instead of PSW_USER_BITS to preserve PER bit. */
103 	regs->psw.mask = (regs->psw.mask & ~(PSW_MASK_USER | PSW_MASK_RI)) |
104 		(__u64)(user_sregs.regs.psw.mask & PSW32_MASK_USER) << 32 |
105 		(__u64)(user_sregs.regs.psw.mask & PSW32_MASK_RI) << 32 |
106 		(__u64)(user_sregs.regs.psw.addr & PSW32_ADDR_AMODE);
108 	if ((regs->psw.mask & PSW_MASK_ASC) == PSW_ASC_HOME)
109 		regs->psw.mask = PSW_ASC_PRIMARY |
110 			(regs->psw.mask & ~PSW_MASK_ASC);
111 	regs->psw.addr = (__u64)(user_sregs.regs.psw.addr & PSW32_ADDR_INSN);
113 		regs->gprs[i] = (__u64) user_sregs.regs.gprs[i];
114 	memcpy(&current->thread.acrs, &user_sregs.regs.acrs,
118 	clear_pt_regs_flag(regs, PIF_SYSCALL); /* No longer in a system call */
122 static int save_sigregs_ext32(struct pt_regs *regs,
131 		gprs_high[i] = regs->gprs[i] >> 32;
150 static int restore_sigregs_ext32(struct pt_regs *regs,
162 		*(__u32 *)&regs->gprs[i] = gprs_high[i];
180 	struct pt_regs *regs = task_pt_regs(current);
181 	sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15];
188 	if (restore_sigregs32(regs, &frame->sregs))
190 	if (restore_sigregs_ext32(regs, &frame->sregs_ext))
193 	return regs->gprs[2];
201 	struct pt_regs *regs = task_pt_regs(current);
202 	rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15];
211 	if (restore_sigregs32(regs, &frame->uc.uc_mcontext))
213 	if (restore_sigregs_ext32(regs, &frame->uc.uc_mcontext_ext))
216 	return regs->gprs[2];
231 get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
236 	sp = (unsigned long) A(regs->gprs[15]);
252 			 struct pt_regs *regs)
268 	frame = get_sigframe(&ksig->ka, regs, frame_size);
273 	if (__put_user(regs->gprs[15], (unsigned int __user *) frame))
287 	if (save_sigregs32(regs, &frame->sregs))
291 	if (__put_user(regs->gprs[2], (int __force __user *) &frame->signo))
295 	if (save_sigregs_ext32(regs, &frame->sregs_ext))
308 	regs->gprs[14] = restorer;
309 	regs->gprs[15] = (__force __u64) frame;
311 	regs->psw.mask = PSW_MASK_BA |
313 		(regs->psw.mask & ~PSW_MASK_ASC);
314 	regs->psw.addr = (__force __u64) ksig->ka.sa.sa_handler;
316 	regs->gprs[2] = sig;
317 	regs->gprs[3] = (__force __u64) &frame->sc;
324 		regs->gprs[4] = regs->int_code & 127;
325 		regs->gprs[5] = regs->int_parm_long;
326 		regs->gprs[6] = current->thread.last_break;
333 			    struct pt_regs *regs)
354 	frame = get_sigframe(&ksig->ka, regs, frame_size);
359 	if (__put_user(regs->gprs[15], (unsigned int __force __user *) frame))
381 	    __compat_save_altstack(&frame->uc.uc_stack, regs->gprs[15]) ||
382 	    save_sigregs32(regs, &frame->uc.uc_mcontext) ||
384 	    save_sigregs_ext32(regs, &frame->uc.uc_mcontext_ext))
388 	regs->gprs[14] = restorer;
389 	regs->gprs[15] = (__force __u64) frame;
391 	regs->psw.mask = PSW_MASK_BA |
393 		(regs->psw.mask & ~PSW_MASK_ASC);
394 	regs->psw.addr = (__u64 __force) ksig->ka.sa.sa_handler;
396 	regs->gprs[2] = ksig->sig;
397 	regs->gprs[3] = (__force __u64) &frame->info;
398 	regs->gprs[4] = (__force __u64) &frame->uc;
399 	regs->gprs[5] = current->thread.last_break;
408 		     struct pt_regs *regs)
414 		ret = setup_rt_frame32(ksig, oldset, regs);
416 		ret = setup_frame32(ksig, oldset, regs);