diff --git a/lib/libkldelf/ef_aarch64.c b/lib/libkldelf/ef_aarch64.c
--- a/lib/libkldelf/ef_aarch64.c
+++ b/lib/libkldelf/ef_aarch64.c
@@ -71,9 +71,18 @@
 		addr = EF_SYMADDR(ef, symidx) + addend;
 		le64enc(where, addr);
 		break;
+	case R_AARCH64_TSTBR14:
+	case R_AARCH64_CONDBR19:
+	case R_AARCH64_JUMP26:
+	case R_AARCH64_CALL26:
+	case R_AARCH64_GLOB_DAT:
+	case R_AARCH64_JUMP_SLOT:
+	case R_AARCH64_IRELATIVE:
+		/* Unimplemented for now */
+		break;
 	default:
 		warnx("unhandled relocation type %d", (int)rtype);
-		break;
+		return (EOPNOTSUPP);
 	}
 	return (0);
 }
diff --git a/lib/libkldelf/ef_amd64.c b/lib/libkldelf/ef_amd64.c
--- a/lib/libkldelf/ef_amd64.c
+++ b/lib/libkldelf/ef_amd64.c
@@ -104,8 +104,16 @@
 		addr = relbase + addend;
 		le64enc(where, addr);
 		break;
+	case R_X86_64_PC32:	/* S + A - P */
+	case R_X86_64_PLT32:	/* L + A - P, L is PLT location for
+				   the symbol, which we treat as S */
+	case R_X86_64_JMP_SLOT:	/* XXX need addend + offset */
+	case R_X86_64_IRELATIVE:
+		/* Unimplemented for now */
+		break;
 	default:
 		warnx("unhandled relocation type %d", (int)rtype);
+		return (EOPNOTSUPP);
 	}
 	return (0);
 }
diff --git a/lib/libkldelf/ef_arm.c b/lib/libkldelf/ef_arm.c
--- a/lib/libkldelf/ef_arm.c
+++ b/lib/libkldelf/ef_arm.c
@@ -85,8 +85,12 @@
 		addr = relbase + addend;
 		le32enc(where, addr);
 		break;
+	case R_ARM_JUMP_SLOT:
+		/* Unimplemented for now */
+		break;
 	default:
 		warnx("unhandled relocation type %d", (int)rtype);
+		return (EOPNOTSUPP);
 	}
 	return (0);
 }
diff --git a/lib/libkldelf/ef_i386.c b/lib/libkldelf/ef_i386.c
--- a/lib/libkldelf/ef_i386.c
+++ b/lib/libkldelf/ef_i386.c
@@ -88,8 +88,14 @@
 		addr = EF_SYMADDR(ef, symidx);
 		le32enc(where, addr);
 		break;
+	case R_386_PC32:
+	case R_386_JMP_SLOT:
+	case R_386_IRELATIVE:
+		/* Unimplemented for now */
+		break;
 	default:
 		warnx("unhandled relocation type %d", (int)rtype);
+		return (EOPNOTSUPP);
 	}
 	return (0);
 }
diff --git a/lib/libkldelf/ef_powerpc.c b/lib/libkldelf/ef_powerpc.c
--- a/lib/libkldelf/ef_powerpc.c
+++ b/lib/libkldelf/ef_powerpc.c
@@ -86,8 +86,13 @@
 		else
 			be64enc(where, addr);
 		break;
+	case R_PPC_JMP_SLOT:
+	case R_PPC_IRELATIVE:
+		/* Unimplemented for now */
+		break;
 	default:
 		warnx("unhandled relocation type %d", (int)rtype);
+		return (EOPNOTSUPP);
 	}
 	return (0);
 }
diff --git a/lib/libkldelf/ef_riscv.c b/lib/libkldelf/ef_riscv.c
--- a/lib/libkldelf/ef_riscv.c
+++ b/lib/libkldelf/ef_riscv.c
@@ -76,8 +76,20 @@
 		addr = relbase + addend;
 		le64enc(where, addr);
 		break;
+	case R_RISCV_JUMP_SLOT:
+	case R_RISCV_JAL:
+	case R_RISCV_CALL:
+	case R_RISCV_PCREL_HI20:
+	case R_RISCV_PCREL_LO12_I:
+	case R_RISCV_PCREL_LO12_S:
+	case R_RISCV_HI20:
+	case R_RISCV_LO12_I:
+	case R_RISCV_LO12_S:
+		/* Unimplemented for now */
+		break;
 	default:
 		warnx("unhandled relocation type %d", (int)rtype);
+		return (EOPNOTSUPP);
 	}
 	return (0);
 }