2 files changed, 161 insertions, 0 deletions
diff --git a/frida_mode/test/testinstr.c b/frida_mode/test/testinstr.c
new file mode 100644
index 00000000..37d47f91
--- /dev/null
+++ b/frida_mode/test/testinstr.c
@@ -0,0 +1,112 @@
+/*
+   american fuzzy lop++ - a trivial program to test the build
+   --------------------------------------------------------
+   Originally written by Michal Zalewski
+   Copyright 2014 Google Inc. All rights reserved.
+   Copyright 2019-2020 AFLplusplus Project. All rights reserved.
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at:
+     http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#ifdef __APPLE__
+  #define TESTINSTR_SECTION
+#else
+  #define TESTINSTR_SECTION __attribute__((section(".testinstr")))
+#endif
+
+TESTINSTR_SECTION void testinstr(char *buf, int len) {
+
+  if (len < 1) return;
+  buf[len] = 0;
+
+  // we support three input cases
+  if (buf[0] == '0')
+    printf("Looks like a zero to me!\n");
+  else if (buf[0] == '1')
+    printf("Pretty sure that is a one!\n");
+  else
+    printf("Neither one or zero? How quaint!\n");
+
+}
+
+int main(int argc, char **argv) {
+
+  char * file;
+  int    fd = -1;
+  off_t  len;
+  char * buf = NULL;
+  size_t n_read;
+  int    result = -1;
+
+  if (argc != 2) { return 1; }
+
+  do {
+
+    file = argv[1];
+
+    dprintf(STDERR_FILENO, "Running: %s\n", file);
+
+    fd = open(file, O_RDONLY);
+    if (fd < 0) {
+
+      perror("open");
+      break;
+
+    }
+
+    len = lseek(fd, 0, SEEK_END);
+    if (len < 0) {
+
+      perror("lseek (SEEK_END)");
+      break;
+
+    }
+
+    if (lseek(fd, 0, SEEK_SET) != 0) {
+
+      perror("lseek (SEEK_SET)");
+      break;
+
+    }
+
+    buf = malloc(len);
+    if (buf == NULL) {
+
+      perror("malloc");
+      break;
+
+    }
+
+    n_read = read(fd, buf, len);
+    if (n_read != len) {
+
+      perror("read");
+      break;
+
+    }
+
+    dprintf(STDERR_FILENO, "Running:    %s: (%zd bytes)\n", file, n_read);
+
+    testinstr(buf, len);
+    dprintf(STDERR_FILENO, "Done:    %s: (%zd bytes)\n", file, n_read);
+
+    result = 0;
+
+  } while (false);
+
+  if (buf != NULL) { free(buf); }
+
+  if (fd != -1) { close(fd); }
+
+  return result;
+
+}
+
diff --git a/frida_mode/test/testinstr.py b/frida_mode/test/testinstr.py
new file mode 100755
index 00000000..f648808b
--- /dev/null
+++ b/frida_mode/test/testinstr.py
@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+import argparse
+from elftools.elf.elffile import ELFFile
+
+
+def process_file(file, section, base):
+    with open(file, "rb") as f:
+        for sect in ELFFile(f).iter_sections():
+            if sect.name == section:
+                start = base + sect.header["sh_offset"]
+                end = start + sect.header["sh_size"]
+                print("0x%016x-0x%016x" % (start, end))
+                return
+
+    print("Section '%s' not found in '%s'" % (section, file))
+
+
+def hex_value(x):
+    return int(x, 16)
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Process some integers.")
+    parser.add_argument(
+        "-f", "--file", dest="file", type=str, help="elf file name", required=True
+    )
+    parser.add_argument(
+        "-s",
+        "--section",
+        dest="section",
+        type=str,
+        help="elf section name",
+        required=True,
+    )
+    parser.add_argument(
+        "-b",
+        "--base",
+        dest="base",
+        type=hex_value,
+        help="elf base address",
+        required=True,
+    )
+
+    args = parser.parse_args()
+    process_file(args.file, args.section, args.base)
+
+
+if __name__ == "__main__":
+    main()