commit - 39df7cd8dd598a6d95c851dc6b69b6fbea683b4d
commit + 83cd8a8e99d04253314b60aa491176f237250037
blob - 0c878a1eb542bb6bcc634b8e842d5721fdaccc2a
blob + 91350d93658eef52d1cbcc5be62f5bf4032775da
--- src/cpu.c
+++ src/cpu.c
@@ -385,17 +385,19 @@ void cpu_exec (u32 instr)
 			alu ("div");
 			break;
 		case 0b0000001'101: // divu
-			c = b != 0 ? a / b : -1;
+			c = b != 0 ? a / b : (u64)-1;
 			alu ("divu");
 			break;
 		case 0b0000001'110: // rem
-			c = b != 0 ? (i64)a % (i64)b : a;
+			c = b != 0 ? (i64)a % (i64)b : (i64)a;
 			alu ("rem");
 			break;
 		case 0b0000001'111: // remu
 			c = b != 0 ? a % b : 1;
 			alu ("remu");
 			break;
+		default:
+			goto ud;
 		}
 		cpu_set (rd, c);
 		break;
@@ -432,7 +434,7 @@ void cpu_exec (u32 instr)
 			alu ("divw");
 			break;
 		case 0b000001'101: // divuw
-			c = extend (b != 0 ? (u32)a / (u32)b : -1);
+			c = extend (b != 0 ? (u32)a / (u32)b : (u32)-1);
 			alu ("divuw");
 			break;
 		case 0b000001'110: // remw
blob - 0fdb8431581673d815c4611a6f56838ddaf0b614
blob + 9ada52fb6a271150c560cdd20e4e74f7de42eeeb
--- src/exec.c
+++ src/exec.c
@@ -24,7 +24,7 @@ void read_elf_ehdr (int fd, struct elf64_ehdr *ehdr)
 	char buffer[sizeof (*ehdr)];
 	if (read (fd, buffer, sizeof (buffer)) != sizeof (buffer))
 		err (1, "read_elf_ehdr()");
-	decode_elf64_ehdr (ehdr, buffer);
+	decode_elf64_ehdr (ehdr, (uint8_t *)buffer);
 }
 
 int my_execve (const char *path, char **argv, char **envp)
blob - 4c367bd11bfe114032fcf6f6573f29b1054327f4
blob + d2cbcf1530cd6d8035c7fbb7190bf9ec8bf51508
--- src/linurv.c
+++ src/linurv.c
@@ -90,7 +90,7 @@ static void load_image (const char *filename)
 		if (read (fd, buffer, ehdr.phentsize) != sizeof (buffer))
 			err (1, "failed to read program header %u", i);
 
-		decode_elf64_phdr (&phdr, buffer);
+		decode_elf64_phdr (&phdr, (uint8_t *)buffer);
 
 		switch (phdr.type) {
 		case PT_NULL: