1 // SPDX-License-Identifier: GPL-2.0-only
10  * Added Linux support -miguel (weird, eh?, the original code was meant
33 #include <asm/asi.h>
102  * 1) flush the D-cache if it's possible than an illegal alias
104  * 2) flush the I-cache if this is pre-cheetah and we did a write
121 	 * D-cache flush.  in flush_ptrace_access()
134 			start &= ~(dcache_line_size - 1);  in flush_ptrace_access()
165 			return -EFAULT;  in get_from_target()
170 			return -EFAULT;  in get_from_target()
180 			return -EFAULT;  in set_to_target()
185 			return -EFAULT;  in set_to_target()
194 	unsigned long rw_addr = regs->u_regs[UREG_I6];  in regwindow64_get()
201 			return -EFAULT;  in regwindow64_get()
203 			wbuf->locals[i] = win32.locals[i];  in regwindow64_get()
205 			wbuf->ins[i] = win32.ins[i];  in regwindow64_get()
209 			return -EFAULT;  in regwindow64_get()
219 	unsigned long rw_addr = regs->u_regs[UREG_I6];  in regwindow64_set()
226 			win32.locals[i] = wbuf->locals[i];  in regwindow64_set()
228 			win32.ins[i] = wbuf->ins[i];  in regwindow64_set()
231 			return -EFAULT;  in regwindow64_set()
235 			return -EFAULT;  in regwindow64_set()
256 	membuf_write(&to, regs->u_regs, 16 * sizeof(u64));  in genregs64_get()
260 		return -EFAULT;  in genregs64_get()
263 	membuf_write(&to, &regs->tstate, 3 * sizeof(u64));  in genregs64_get()
264 	return membuf_store(&to, (u64)regs->y);  in genregs64_get()
279 				 regs->u_regs,  in genregs64_set()
285 			return -EFAULT;  in genregs64_set()
294 			return -EFAULT;  in genregs64_set()
310 			regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);  in genregs64_set()
311 			regs->tstate |= tstate;  in genregs64_set()
318 					 &regs->tpc,  in genregs64_set()
324 		unsigned long y = regs->y;  in genregs64_set()
331 			regs->y = y;  in genregs64_set()
336 					  36 * sizeof(u64), -1);  in genregs64_set()
351 	fprs = t->fpsaved[0];  in fpregs64_get()
354 		membuf_write(&to, t->fpregs, 16 * sizeof(u64));  in fpregs64_get()
359 		membuf_write(&to, t->fpregs + 16, 16 * sizeof(u64));  in fpregs64_get()
363 		membuf_store(&to, t->xfsr[0]);  in fpregs64_get()
364 		membuf_store(&to, t->gsr[0]);  in fpregs64_get()
376 	unsigned long *fpregs = task_thread_info(target)->fpregs;  in fpregs64_set()
388 					 task_thread_info(target)->xfsr,  in fpregs64_set()
393 					 task_thread_info(target)->gsr,  in fpregs64_set()
397 	fprs = task_thread_info(target)->fpsaved[0];  in fpregs64_set()
406 	task_thread_info(target)->fpsaved[0] = fprs;  in fpregs64_set()
410 					  35 * sizeof(u64), -1);  in fpregs64_set()
415 	/* Format is:
416 	 * 	G0 --> G7
417 	 *	O0 --> O7
418 	 *	L0 --> L7
419 	 *	I0 --> I7
428 	/* Format is:
429 	 *	F0 --> F63
451 	membuf_write(&to, regs->u_regs + 1, 15 * sizeof(u64));  in getregs64_get()
453 	membuf_write(&to, &regs->tstate, 3 * sizeof(u64));  in getregs64_get()
454 	return membuf_store(&to, (u64)regs->y);  in getregs64_get()
463 	unsigned long y = regs->y;  in setregs64_set()
471 				 regs->u_regs + 1,  in setregs64_set()
489 	regs->tstate &= ~(TSTATE_ICC | TSTATE_XCC | TSTATE_SYSCALL);  in setregs64_set()
490 	regs->tstate |= tstate;  in setregs64_set()
494 				 &regs->tpc,  in setregs64_set()
505 		regs->y = y;  in setregs64_set()
510 	/* Format is:
511 	 *      G1 --> G7
512 	 *      O0 --> O7
544 		membuf_store(&to, (u32)regs->u_regs[i]);  in genregs32_get()
547 	if (get_from_target(target, regs->u_regs[UREG_I6],  in genregs32_get()
549 		return -EFAULT;  in genregs32_get()
551 	membuf_store(&to, (u32)tstate_to_psr(regs->tstate));  in genregs32_get()
552 	membuf_store(&to, (u32)(regs->tpc));  in genregs32_get()
553 	membuf_store(&to, (u32)(regs->tnpc));  in genregs32_get()
554 	membuf_store(&to, (u32)(regs->y));  in genregs32_get()
576 		for (; count > 0 && pos < 16; count--)  in genregs32_set()
577 			regs->u_regs[pos++] = *k++;  in genregs32_set()
579 		reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];  in genregs32_set()
580 		reg_window -= 16;  in genregs32_set()
582 			for (; count > 0 && pos < 32; count--) {  in genregs32_set()
584 					return -EFAULT;  in genregs32_set()
587 			for (; count > 0 && pos < 32; count--) {  in genregs32_set()
595 					return -EFAULT;  in genregs32_set()
601 		for (; count > 0 && pos < 16; count--) {  in genregs32_set()
603 				return -EFAULT;  in genregs32_set()
604 			regs->u_regs[pos++] = reg;  in genregs32_set()
607 		reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6];  in genregs32_set()
608 		reg_window -= 16;  in genregs32_set()
610 			for (; count > 0 && pos < 32; count--) {  in genregs32_set()
613 					return -EFAULT;  in genregs32_set()
616 			for (; count > 0 && pos < 32; count--) {  in genregs32_set()
618 					return -EFAULT;  in genregs32_set()
625 					return -EFAULT;  in genregs32_set()
637 			return -EFAULT;  in genregs32_set()
641 			tstate = regs->tstate;  in genregs32_set()
646 			regs->tstate = tstate;  in genregs32_set()
649 			regs->tpc = reg;  in genregs32_set()
652 			regs->tnpc = reg;  in genregs32_set()
655 			regs->y = reg;  in genregs32_set()
665 		count--;  in genregs32_set()
672 				  38 * sizeof(reg), -1);  in genregs32_set()
686 	enabled = t->fpsaved[0] & FPRS_FEF;  in fpregs32_get()
688 	membuf_write(&to, t->fpregs, 32 * sizeof(u32));  in fpregs32_get()
691 		membuf_store(&to, (u32)t->xfsr[0]);  in fpregs32_get()
703 	unsigned long *fpregs = task_thread_info(target)->fpregs;  in fpregs32_set()
710 	fprs = task_thread_info(target)->fpsaved[0];  in fpregs32_set()
728 			val = task_thread_info(target)->xfsr[0];  in fpregs32_set()
731 			task_thread_info(target)->xfsr[0] = val;  in fpregs32_set()
736 	task_thread_info(target)->fpsaved[0] = fprs;  in fpregs32_set()
740 					  34 * sizeof(u32), -1);  in fpregs32_set()
745 	/* Format is:
746 	 * 	G0 --> G7
747 	 *	O0 --> O7
748 	 *	L0 --> L7
749 	 *	I0 --> I7
758 	/* Format is:
759 	 *	F0 --> F31
760 	 *	empty 32-bit word
761 	 *	FSR (32--bit word)
762 	 *	FPU QUEUE COUNT (8-bit char)
763 	 *	FPU QUEUE ENTRYSIZE (8-bit char)
764 	 *	FPU ENABLED (8-bit char)
765 	 *	empty 8-bit char
766 	 *	FPU QUEUE (64 32-bit ints)
786 	membuf_store(&to, (u32)tstate_to_psr(regs->tstate));  in getregs_get()
787 	membuf_store(&to, (u32)(regs->tpc));  in getregs_get()
788 	membuf_store(&to, (u32)(regs->tnpc));  in getregs_get()
789 	membuf_store(&to, (u32)(regs->y));  in getregs_get()
791 		membuf_store(&to, (u32)regs->u_regs[i]);  in getregs_get()
814 	tstate = regs->tstate;  in setregs_set()
819 	regs->tstate = tstate;  in setregs_set()
820 	regs->tpc = uregs[1];  in setregs_set()
821 	regs->tnpc = uregs[2];  in setregs_set()
822 	regs->y = uregs[3];  in setregs_set()
825 		regs->u_regs[i] = uregs[3 + i];  in setregs_set()
838 	membuf_write(&to, t->fpregs, 32 * sizeof(u32));  in getfpregs_get()
839 	if (t->fpsaved[0] & FPRS_FEF)  in getfpregs_get()
840 		membuf_store(&to, (u32)t->xfsr[0]);  in getfpregs_get()
851 	unsigned long *fpregs = task_thread_info(target)->fpregs;  in setfpregs_set()
858 	fprs = task_thread_info(target)->fpsaved[0];  in setfpregs_set()
872 			val = task_thread_info(target)->xfsr[0];  in setfpregs_set()
875 			task_thread_info(target)->xfsr[0] = val;  in setfpregs_set()
880 	task_thread_info(target)->fpsaved[0] = fprs;  in setfpregs_set()
930 	compat_ulong_t caddr2 = task_pt_regs(current)->u_regs[UREG_I4];  in compat_arch_ptrace()
943 		ret = (addr != 0) ? -EIO : 0;  in compat_arch_ptrace()
981 			ret = -EIO;  in compat_arch_ptrace()
991 			ret = -EIO;  in compat_arch_ptrace()
1014 	unsigned long addr2 = task_pt_regs(current)->u_regs[UREG_I4];  in arch_ptrace()
1026 		ret = (addr != 0) ? -EIO : 0;  in arch_ptrace()
1063 			ret = -EIO;  in arch_ptrace()
1072 			ret = -EIO;  in arch_ptrace()
1090 	secure_computing_strict(regs->u_regs[UREG_G1]);  in syscall_trace_enter()
1099 		trace_sys_enter(regs, regs->u_regs[UREG_G1]);  in syscall_trace_enter()
1101 	audit_syscall_entry(regs->u_regs[UREG_G1], regs->u_regs[UREG_I0],  in syscall_trace_enter()
1102 			    regs->u_regs[UREG_I1], regs->u_regs[UREG_I2],  in syscall_trace_enter()
1103 			    regs->u_regs[UREG_I3]);  in syscall_trace_enter()
1116 		trace_sys_exit(regs, regs->u_regs[UREG_I0]);  in syscall_trace_leave()
1126  * regs_query_register_offset() - query register offset from its name
1130  * pt_regs from its name. If the name is invalid, this returns -EINVAL;
1136 	for (roff = regoffset_table; roff->name != NULL; roff++)  in regs_query_register_offset()
1137 		if (!strcmp(roff->name, name))  in regs_query_register_offset()
1138 			return roff->offset;  in regs_query_register_offset()
1139 	return -EINVAL;  in regs_query_register_offset()
1143  * regs_within_kernel_stack() - check the address in the stack
1154 	return ((addr & ~(THREAD_SIZE - 1))  ==  in regs_within_kernel_stack()
1155 		(ksp & ~(THREAD_SIZE - 1)));  in regs_within_kernel_stack()
1159  * regs_get_kernel_stack_nth() - get Nth entry of the stack