diff --git a/src/iss/arch/riscv_hart_m_p.h b/src/iss/arch/riscv_hart_m_p.h
index c0059b2..8365a5d 100644
--- a/src/iss/arch/riscv_hart_m_p.h
+++ b/src/iss/arch/riscv_hart_m_p.h
@@ -477,10 +477,10 @@ template <typename BASE, features_e FEAT> std::pair<uint64_t, bool> riscv_hart_m
     if (fp) {
         std::array<char, 5> buf;
         auto n = fread(buf.data(), 1, 4, fp);
+        fclose(fp);
         if (n != 4) throw std::runtime_error("input file has insufficient size");
         buf[4] = 0;
         if (strcmp(buf.data() + 1, "ELF") == 0) {
-            fclose(fp);
             // Create elfio reader
             ELFIO::elfio reader;
             // Load ELF data
@@ -571,12 +571,12 @@ iss::status riscv_hart_m_p<BASE, FEAT>::read(const address_type type, const acce
             if (unlikely(is_fetch(access) && (addr&(alignment-1)))) {
                 fault_data = addr;
                 if (is_debug(access)) throw trap_access(0, addr);
-                this->trap_state = (1 << 31); // issue trap 0
+                this->trap_state = (1UL << 31); // issue trap 0
                 return iss::Err;
             }
             try {
                 if(!is_debug(access) && (addr&(alignment-1))){
-                    this->trap_state = 1<<31 | 4<<16;
+                    this->trap_state = (1UL << 31) | 4<<16;
                     fault_data=addr;
                     return iss::Err;
                 }
@@ -595,12 +595,12 @@ iss::status riscv_hart_m_p<BASE, FEAT>::read(const address_type type, const acce
                     res = read_mem( phys_addr, length, data);
                 }
                 if (unlikely(res != iss::Ok)){
-                    this->trap_state = (1 << 31) | (5 << 16); // issue trap 5 (load access fault
+                    this->trap_state = (1UL << 31) | (5 << 16); // issue trap 5 (load access fault
                     fault_data=addr;
                 }
                 return res;
             } catch (trap_access &ta) {
-                this->trap_state = (1 << 31) | ta.id;
+                this->trap_state = (1UL << 31) | ta.id;
                 fault_data=ta.addr;
                 return iss::Err;
             }
@@ -626,7 +626,7 @@ iss::status riscv_hart_m_p<BASE, FEAT>::read(const address_type type, const acce
         }
         return iss::Ok;
     } catch (trap_access &ta) {
-        this->trap_state = (1 << 31) | ta.id;
+        this->trap_state = (1UL << 31) | ta.id;
         fault_data=ta.addr;
         return iss::Err;
     }
@@ -664,12 +664,12 @@ iss::status riscv_hart_m_p<BASE, FEAT>::write(const address_type type, const acc
             if (unlikely((access && iss::access_type::FETCH) && (addr & 0x1) == 1)) {
                 fault_data = addr;
                 if (access && iss::access_type::DEBUG) throw trap_access(0, addr);
-                this->trap_state = (1 << 31); // issue trap 0
+                this->trap_state = (1UL << 31); // issue trap 0
                 return iss::Err;
             }
             try {
                 if(length>1 && (addr&(length-1)) && (access&access_type::DEBUG) != access_type::DEBUG){
-                    this->trap_state = 1<<31 | 6<<16;
+                    this->trap_state = (1UL << 31) | 6<<16;
                     fault_data=addr;
                     return iss::Err;
                 }
@@ -688,12 +688,12 @@ iss::status riscv_hart_m_p<BASE, FEAT>::write(const address_type type, const acc
                     res = write_mem( phys_addr, length, data);
                 }
                 if (unlikely(res != iss::Ok)) {
-                    this->trap_state = (1 << 31) | (7 << 16); // issue trap 7 (Store/AMO access fault)
+                    this->trap_state = (1UL << 31) | (7 << 16); // issue trap 7 (Store/AMO access fault)
                     fault_data=addr;
                 }
                 return res;
             } catch (trap_access &ta) {
-                this->trap_state = (1 << 31) | ta.id;
+                this->trap_state = (1UL << 31) | ta.id;
                 fault_data=ta.addr;
                 return iss::Err;
             }
@@ -753,7 +753,7 @@ iss::status riscv_hart_m_p<BASE, FEAT>::write(const address_type type, const acc
         }
         return iss::Ok;
     } catch (trap_access &ta) {
-        this->trap_state = (1 << 31) | ta.id;
+        this->trap_state = (1UL << 31) | ta.id;
         fault_data=ta.addr;
         return iss::Err;
     }
diff --git a/src/iss/arch/riscv_hart_mu_p.h b/src/iss/arch/riscv_hart_mu_p.h
index 1cf8484..87ff8b9 100644
--- a/src/iss/arch/riscv_hart_mu_p.h
+++ b/src/iss/arch/riscv_hart_mu_p.h
@@ -526,10 +526,10 @@ template <typename BASE, features_e FEAT> std::pair<uint64_t, bool> riscv_hart_m
     if (fp) {
         std::array<char, 5> buf;
         auto n = fread(buf.data(), 1, 4, fp);
+        fclose(fp);
         if (n != 4) throw std::runtime_error("input file has insufficient size");
         buf[4] = 0;
         if (strcmp(buf.data() + 1, "ELF") == 0) {
-            fclose(fp);
             // Create elfio reader
             ELFIO::elfio reader;
             // Load ELF data
@@ -708,7 +708,7 @@ iss::status riscv_hart_mu_p<BASE, FEAT>::read(const address_type type, const acc
                 if(!pmp_check(access, addr, length) && !is_debug(access)) {
                     fault_data = addr;
                     if (is_debug(access)) throw trap_access(0, addr);
-                    this->trap_state = (1 << 31) | ((access==access_type::FETCH?1:5) << 16); // issue trap 1
+                    this->trap_state = (1UL << 31) | ((access==access_type::FETCH?1:5) << 16); // issue trap 1
                     return iss::Err;
                 }
             }
@@ -716,12 +716,12 @@ iss::status riscv_hart_mu_p<BASE, FEAT>::read(const address_type type, const acc
             if (unlikely(is_fetch(access) && (addr&(alignment-1)))) {
                 fault_data = addr;
                 if (is_debug(access)) throw trap_access(0, addr);
-                this->trap_state = (1 << 31); // issue trap 0
+                this->trap_state = (1UL << 31); // issue trap 0
                 return iss::Err;
             }
             try {
                 if(!is_debug(access)  && (addr&(alignment-1))){
-                    this->trap_state = 1<<31 | 4<<16;
+                    this->trap_state = (1UL << 31) | 4<<16;
                     fault_data=addr;
                     return iss::Err;
                 }
@@ -740,12 +740,12 @@ iss::status riscv_hart_mu_p<BASE, FEAT>::read(const address_type type, const acc
                     res = read_mem( phys_addr, length, data);
                 }
                 if (unlikely(res != iss::Ok)){
-                    this->trap_state = (1 << 31) | (5 << 16); // issue trap 5 (load access fault
+                    this->trap_state = (1UL << 31) | (5 << 16); // issue trap 5 (load access fault
                     fault_data=addr;
                 }
                 return res;
             } catch (trap_access &ta) {
-                this->trap_state = (1 << 31) | ta.id;
+                this->trap_state = (1UL << 31) | ta.id;
                 fault_data=ta.addr;
                 return iss::Err;
             }
@@ -771,7 +771,7 @@ iss::status riscv_hart_mu_p<BASE, FEAT>::read(const address_type type, const acc
         }
         return iss::Ok;
     } catch (trap_access &ta) {
-        this->trap_state = (1 << 31) | ta.id;
+        this->trap_state = (1UL << 31) | ta.id;
         fault_data=ta.addr;
         return iss::Err;
     }
@@ -810,19 +810,19 @@ iss::status riscv_hart_mu_p<BASE, FEAT>::write(const address_type type, const ac
                 if(!pmp_check(access, addr, length) && (access&access_type::DEBUG) != access_type::DEBUG) {
                     fault_data = addr;
                     if (access && iss::access_type::DEBUG) throw trap_access(0, addr);
-                    this->trap_state = (1 << 31) | (7 << 16); // issue trap 1
+                    this->trap_state = (1UL << 31) | (7 << 16); // issue trap 1
                     return iss::Err;
                 }
             }
             if (unlikely((access && iss::access_type::FETCH) && (addr & 0x1) == 1)) {
                 fault_data = addr;
                 if (access && iss::access_type::DEBUG) throw trap_access(0, addr);
-                this->trap_state = (1 << 31); // issue trap 0
+                this->trap_state = (1UL << 31); // issue trap 0
                 return iss::Err;
             }
             try {
                 if(length>1 && (addr&(length-1)) && (access&access_type::DEBUG) != access_type::DEBUG){
-                    this->trap_state = 1<<31 | 6<<16;
+                    this->trap_state = (1UL << 31) | 6<<16;
                     fault_data=addr;
                     return iss::Err;
                 }
@@ -841,12 +841,12 @@ iss::status riscv_hart_mu_p<BASE, FEAT>::write(const address_type type, const ac
                     res = write_mem( phys_addr, length, data);
                 }
                 if (unlikely(res != iss::Ok)) {
-                    this->trap_state = (1 << 31) | (7 << 16); // issue trap 7 (Store/AMO access fault)
+                    this->trap_state = (1UL << 31) | (7 << 16); // issue trap 7 (Store/AMO access fault)
                     fault_data=addr;
                 }
                 return res;
             } catch (trap_access &ta) {
-                this->trap_state = (1 << 31) | ta.id;
+                this->trap_state = (1UL << 31) | ta.id;
                 fault_data=ta.addr;
                 return iss::Err;
             }
@@ -906,7 +906,7 @@ iss::status riscv_hart_mu_p<BASE, FEAT>::write(const address_type type, const ac
         }
         return iss::Ok;
     } catch (trap_access &ta) {
-        this->trap_state = (1 << 31) | ta.id;
+        this->trap_state = (1UL << 31) | ta.id;
         fault_data=ta.addr;
         return iss::Err;
     }