--- zzzz-none-000/linux-4.4.60/arch/mips/kernel/process.c	2017-04-08 07:53:53.000000000 +0000
+++ dragonfly-4020-701/linux-4.4.60/arch/mips/kernel/process.c	2018-11-08 13:36:17.000000000 +0000
@@ -175,6 +175,62 @@
 	return 0;
 }
 
+/* Fill in the fpu structure for a core dump.. */
+int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r)
+{
+	int i;
+
+	for (i = 0; i < NUM_FPU_REGS; i++)
+		memcpy(&r[i], &current->thread.fpu.fpr[i], sizeof(*r));
+
+	memcpy(&r[NUM_FPU_REGS], &current->thread.fpu.fcr31,
+	       sizeof(current->thread.fpu.fcr31));
+
+	return 1;
+}
+
+void elf_dump_regs(elf_greg_t *gp, struct pt_regs *regs)
+{
+	int i;
+
+	for (i = 0; i < EF_R0; i++)
+		gp[i] = 0;
+	gp[EF_R0] = 0;
+	for (i = 1; i <= 31; i++)
+		gp[EF_R0 + i] = regs->regs[i];
+	gp[EF_R26] = 0;
+	gp[EF_R27] = 0;
+	gp[EF_LO] = regs->lo;
+	gp[EF_HI] = regs->hi;
+	gp[EF_CP0_EPC] = regs->cp0_epc;
+	gp[EF_CP0_BADVADDR] = regs->cp0_badvaddr;
+	gp[EF_CP0_STATUS] = regs->cp0_status;
+	gp[EF_CP0_CAUSE] = regs->cp0_cause;
+#ifdef EF_UNUSED0
+	gp[EF_UNUSED0] = 0;
+#endif
+}
+EXPORT_SYMBOL_GPL(elf_dump_regs);
+
+int dump_task_regs(struct task_struct *tsk, elf_gregset_t *regs)
+{
+	elf_dump_regs(*regs, task_pt_regs(tsk));
+	return 1;
+}
+
+int dump_task_fpu(struct task_struct *t, elf_fpregset_t *fpr)
+{
+	int i;
+
+	for (i = 0; i < NUM_FPU_REGS; i++)
+		memcpy(&fpr[i], &t->thread.fpu.fpr[i], sizeof(*fpr));
+
+	memcpy(&fpr[NUM_FPU_REGS], &t->thread.fpu.fcr31,
+	       sizeof(t->thread.fpu.fcr31));
+
+	return 1;
+}
+
 #ifdef CONFIG_CC_STACKPROTECTOR
 #include <linux/stackprotector.h>
 unsigned long __stack_chk_guard __read_mostly;
@@ -598,6 +654,7 @@
 	return sp & ALMASK;
 }
 
+#if !defined(CONFIG_AVM_ENHANCED)
 static void arch_dump_stack(void *info)
 {
 	struct pt_regs *regs;
@@ -614,6 +671,7 @@
 {
 	smp_call_function(arch_dump_stack, NULL, 1);
 }
+#endif/*--- #if !defined(CONFIG_AVM_ENHANCED) ---*/
 
 int mips_get_process_fp_mode(struct task_struct *task)
 {