fix riscv-tests and add flag for exit call

Author: PiMaker

Diff for: src/emu.h

@@ -10,6 +10,8 @@
 #include "trap.h"
 #include "csr.h"
 
+static bool allow_ecall_exit = false;
+
 #define AS_SIGNED(val) (*(int32_t*)&val)
 #define AS_UNSIGNED(val) (*(uint*)&val)
 const uint ZERO = 0;
@@ -203,12 +205,12 @@ DEF(ebreak, FormatEmpty, { // system
     SINGLE_STEP=1;
 })
 DEF(ecall, FormatEmpty, { // system
-    /* if (cpu->xreg[17] == 93) { */
-    /*     // EXIT CALL */
-    /*     uint status = cpu->xreg[10] >> 1; */
-    /*     printf("ecall EXIT = %d (0x%x)\n", status, status); */
-    /*     exit(status); */
-    /* } */
+    if (allow_ecall_exit && cpu->xreg[17] == 93) {
+        // EXIT CALL
+        uint status = cpu->xreg[10] >> 1;
+        printf("ecall EXIT = %d (0x%x)\n", status, status);
+        exit(status);
+    }
 
     ret->trap.en = true;
     ret->trap.value = cpu->pc;

Diff for: src/main.c

@@ -58,7 +58,7 @@ uint8_t* get_mmap_ptr(const char* filename) {
 }
 
 void usage() {
-    printf("Usage: rvc (-e <ELF binary>|-b <raw binary>) [-d <device tree binary>] [-i <initramfs>] [-v (0|1|2|3|4)] [-s] [-t]\n");
+    printf("Usage: rvc (-e <ELF binary>|-b <raw binary>) [-d <device tree binary>] [-i <initramfs>] [-v (0|1|2|3|4)] [-s] [-t] [-x]\n");
     exit(EXIT_FAILURE);
 }
 
@@ -92,9 +92,12 @@ int main(int argc, char *argv[]) {
     int c;
     bool trace = false;
 
-    while ((c = getopt (argc, argv, "e:b:d:v:i:st")) != -1) {
+    while ((c = getopt (argc, argv, "e:b:d:v:i:stx")) != -1) {
         switch (c)
         {
+            case 'x':
+                allow_ecall_exit = true;
+                break;
             case 'e':
                 elf = optarg;
                 break;
@@ -163,7 +166,7 @@ int main(int argc, char *argv[]) {
     setvbuf(stdin, NULL, _IONBF, 0);
     buf_off();
 
-    // LIMITER
+    // LIMITER (set to high number to ignore)
     const unsigned long restr = 200000*1000;
     unsigned long cur = 0;
     unsigned long t = time(NULL);
@@ -204,13 +207,13 @@ int main(int argc, char *argv[]) {
         /*     printf("else if (cpu.clock == %d && arb != 0x%08x) ARB_FAIL\n", cpu.clock, arb_f); */
         /* } */
 
-        if (cpu.pc == 0x80000118) {
+        /* if (cpu.pc == 0x80000118) { */
         /* if (cpu.clock == 6350505) { // divergence: 6350908 */
         /* if (cpu.clock == 6400000) { */
-            printf("BREAKPOINT HIT\n");
-            SINGLE_STEP = 1;
-            VERBOSE = 4;
-        }
+            /* printf("BREAKPOINT HIT\n"); */
+            /* SINGLE_STEP = 1; */
+            /* VERBOSE = 4; */
+        /* } */
 
         if (VERBOSE >= 4)
             cpu_dump(&cpu);

Diff for: test.sh

@@ -19,8 +19,8 @@ function run_test {
 
     popd
 
-    echo "Running: ./rvc -e \"./riscv-tests/isa/$1\" -v 1"
-    timeout 5s ./rvc -e "./riscv-tests/isa/$1" -v 1
+    echo "Running: ./rvc -x -e \"./riscv-tests/isa/$1\" -v 1"
+    ./rvc -x -e "./riscv-tests/isa/$1" -v 1
 
     if [ $? -gt 0 ]; then
         echo "Test failed!"