Initial commit

tests/driver.c

@@ -0,0 +1,72 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+
+#include <decode.h>
+
+
+static
+uint8_t
+parse_nibble(const char nibble)
+{
+    if (nibble >= '0' && nibble <= '9')
+    {
+        return nibble - '0';
+    }
+    else if (nibble >= 'a' && nibble <= 'f')
+    {
+        return nibble - 'a' + 10;
+    }
+    else if (nibble >= 'A' && nibble <= 'F')
+    {
+        return nibble - 'A' + 10;
+    }
+    else
+    {
+        printf("Invalid hexadecimal number: %x\n", nibble);
+        exit(1);
+        return 0;
+    }
+}
+
+int
+main(int argc, char** argv)
+{
+    if (argc != 2)
+    {
+        printf("usage: %s [instruction bytes]\n", argv[0]);
+        return -1;
+    }
+
+    void* code = mmap((void*) 0x1238000, 0x2000, PROT_READ|PROT_WRITE,
+                      MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, -1, 0);
+
+    uint8_t* current_code = code;
+    char* hex = argv[1];
+    for (; *hex && *(hex + 1); hex += 2, current_code++)
+    {
+        *current_code = (parse_nibble(hex[0]) << 4) | parse_nibble(hex[1]);
+    }
+
+    size_t length = (size_t) current_code - (size_t) code;
+
+    Instr instr;
+    int result = decode(code, length, &instr);
+    if (result < 0)
+    {
+        puts("Decode failed.");
+        return -1;
+    }
+    else if ((size_t) result != length)
+    {
+        printf("Decode used %u bytes, not %u.\n", (unsigned int) result, (unsigned int) length);
+        return -1;
+    }
+
+    char buffer[128];
+    instr_format(&instr, buffer);
+    puts(buffer);
+
+    return 0;
+}