diff --git a/src/arch/x86_64/include/arch/regs.h b/src/arch/x86_64/include/arch/regs.h
index b19462e7..cf7ddd72 100644
--- a/src/arch/x86_64/include/arch/regs.h
+++ b/src/arch/x86_64/include/arch/regs.h
@@ -4,6 +4,8 @@
 #include <stdint.h>
 #include <stdbool.h>
 
+typedef uint64_t arch_reg;
+
 typedef struct{
 	uint64_t gsbase, fsbase;
 	uint8_t  fx[512];
@@ -17,4 +19,12 @@ void arch_regs_setupextra(arch_extraregs* regs);
 void arch_regs_setupkernel(arch_regs* regs, void* ip, void* stack, bool interrupts);
 void arch_regs_setupuser(arch_regs* regs, void* ip, void* stack, bool interrupts);
 
+static inline void arch_regs_setret(arch_regs* regs, arch_reg reg){
+	regs->rax = reg;
+}
+
+static inline void arch_regs_seterrno(arch_regs* regs, arch_reg reg){
+	regs->rdx = reg;
+}
+
 #endif