14  * At this time Linux/MIPS64 only supports syscall tracing, even for 32-bit
40  * Tracing a 32-bit process with a 64-bit strace and vice versa will not
46 	int addr = caddr;  in compat_arch_ptrace()  local
47 	int data = cdata;  in compat_arch_ptrace()  local
54 	 *  data is a pointer specifying where the user wants the  in compat_arch_ptrace()
56 	 *  addr is a pointer in the user's storage that contains an 8 byte  in compat_arch_ptrace()
58 	 * (this is run in a 32-bit process looking at a 64-bit process)  in compat_arch_ptrace()
67 		ret = -EIO;  in compat_arch_ptrace()
69 		/* Get the addr in the other process that we want to read */  in compat_arch_ptrace()
70 		if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)  in compat_arch_ptrace()
77 		ret = put_user(tmp, (u32 __user *) (unsigned long) data);  in compat_arch_ptrace()
81 	/* Read the word at location addr in the USER area. */  in compat_arch_ptrace()
89 		switch (addr) {  in compat_arch_ptrace()
91 			tmp = regs->regs[addr];  in compat_arch_ptrace()
99 				tmp = -1;  in compat_arch_ptrace()
109 				tmp = get_fpr32(&fregs[(addr & ~1) - FPR_BASE],  in compat_arch_ptrace()
110 						addr & 1);  in compat_arch_ptrace()
113 			tmp = get_fpr64(&fregs[addr - FPR_BASE], 0);  in compat_arch_ptrace()
117 			tmp = child->thread.fpu.fcr31;  in compat_arch_ptrace()
125 			tmp = regs->cp0_epc;  in compat_arch_ptrace()
128 			tmp = regs->cp0_cause;  in compat_arch_ptrace()
131 			tmp = regs->cp0_badvaddr;  in compat_arch_ptrace()
134 			tmp = regs->hi;  in compat_arch_ptrace()
137 			tmp = regs->lo;  in compat_arch_ptrace()
144 				ret = -EIO;  in compat_arch_ptrace()
148 			tmp = dregs[addr - DSP_BASE];  in compat_arch_ptrace()
154 				ret = -EIO;  in compat_arch_ptrace()
157 			tmp = child->thread.dsp.dspcontrol;  in compat_arch_ptrace()
161 			ret = -EIO;  in compat_arch_ptrace()
164 		ret = put_user(tmp, (unsigned __user *) (unsigned long) data);  in compat_arch_ptrace()
170 	 *  data is the 4 bytes that the user wants written  in compat_arch_ptrace()
171 	 *  addr is a pointer in the user's storage that contains an  in compat_arch_ptrace()
174 	 * (this is run in a 32-bit process looking at a 64-bit process)  in compat_arch_ptrace()
181 		/* Get the addr in the other process that we want to write into */  in compat_arch_ptrace()
182 		ret = -EIO;  in compat_arch_ptrace()
183 		if (get_user(addrOthers, (u32 __user * __user *) (unsigned long) addr) != 0)  in compat_arch_ptrace()
186 		if (ptrace_access_vm(child, (u64)addrOthers, &data,  in compat_arch_ptrace()
187 					sizeof(data),  in compat_arch_ptrace()
188 					FOLL_FORCE | FOLL_WRITE) == sizeof(data))  in compat_arch_ptrace()
190 		ret = -EIO;  in compat_arch_ptrace()
199 		switch (addr) {  in compat_arch_ptrace()
201 			regs->regs[addr] = data;  in compat_arch_ptrace()
203 			if (addr == 2)  in compat_arch_ptrace()
205 			else if (addr == 4 &&  in compat_arch_ptrace()
215 				memset(&child->thread.fpu, ~0,  in compat_arch_ptrace()
216 				       sizeof(child->thread.fpu));  in compat_arch_ptrace()
217 				child->thread.fpu.fcr31 = 0;  in compat_arch_ptrace()
225 				set_fpr32(&fregs[(addr & ~1) - FPR_BASE],  in compat_arch_ptrace()
226 					  addr & 1, data);  in compat_arch_ptrace()
229 			set_fpr64(&fregs[addr - FPR_BASE], 0, data);  in compat_arch_ptrace()
233 			child->thread.fpu.fcr31 = data;  in compat_arch_ptrace()
237 			regs->cp0_epc = data;  in compat_arch_ptrace()
240 			regs->hi = data;  in compat_arch_ptrace()
243 			regs->lo = data;  in compat_arch_ptrace()
249 				ret = -EIO;  in compat_arch_ptrace()
254 			dregs[addr - DSP_BASE] = data;  in compat_arch_ptrace()
259 				ret = -EIO;  in compat_arch_ptrace()
262 			child->thread.dsp.dspcontrol = data;  in compat_arch_ptrace()
266 			ret = -EIO;  in compat_arch_ptrace()
274 				(struct user_pt_regs __user *) (__u64) data);  in compat_arch_ptrace()
279 				(struct user_pt_regs __user *) (__u64) data);  in compat_arch_ptrace()
284 		ret = ptrace_getfpregs(child, (__u32 __user *) (__u64) data);  in compat_arch_ptrace()
288 		ret = ptrace_setfpregs(child, (__u32 __user *) (__u64) data);  in compat_arch_ptrace()
292 		ret = put_user(task_thread_info(child)->tp_value,  in compat_arch_ptrace()
293 				(unsigned int __user *) (unsigned long) data);  in compat_arch_ptrace()
297 		ret = put_user(task_thread_info(child)->tp_value,  in compat_arch_ptrace()
298 				(unsigned long __user *) (unsigned long) data);  in compat_arch_ptrace()
303 			(struct pt_watch_regs __user *) (unsigned long) addr);  in compat_arch_ptrace()
308 			(struct pt_watch_regs __user *) (unsigned long) addr);  in compat_arch_ptrace()
312 		ret = compat_ptrace_request(child, request, addr, data);  in compat_arch_ptrace()