Make E9Tool accept -CFR' as alternative to -X'

CFR = Control Flow Recovery

doc/e9compile.1

@@ -1,4 +1,4 @@
-.TH E9COMPILE "1" "June 2022" "E9Compile" "E9Compile"
+.TH E9COMPILE "1" "April 2023" "E9Compile" "E9Compile"
 .SH NAME
 E9Compile \- E9Tool instrumentation compiler
 .SH SYNOPSIS

doc/e9patch.1

@@ -1,4 +1,4 @@
-.TH E9PATCH "1" "June 2022" "E9Patch" "E9Patch"
+.TH E9PATCH "1" "April 2023" "E9Patch" "E9Patch"
 .SH NAME
 E9Patch \- a powerful static binary rewriting tool
 .SH SYNOPSIS

doc/e9tool.1

@@ -1,4 +1,4 @@
-.TH E9TOOL "1" "June 2022" "E9Tool" "E9Tool"
+.TH E9TOOL "1" "April 2023" "E9Tool" "E9Tool"
 .SH NAME
 E9Tool \- a powerful static binary rewriting tool
 .SH SYNOPSIS
@@ -105,6 +105,11 @@ For more information, please refer to the following document:
 .IP "\fB\-\-backend\fR PROG" 4
 Use PROG as the backend.
 The default is "e9patch".
+.IP "\fB\-CFR\fr, \fB\-X\fR" 4
+Enables binary rewriting "with" control-flow recovery.  This
+usually makes the rewritten binary much faster, but may
+introduce rewriting bugs if the built-in recovery analysis is
+inaccurate.
 .IP "\fB\-\-compression\fR N, \fB\-c\fR N" 4
 Set the compression level to be N, where N is a number within
 the range 0..9.  The default is 9 for maximum compression.
@@ -215,11 +220,6 @@ optional second column is 1 for call targets (functions), or
 0 otherwise (the default is 0).
 .IP "\fB\-\-version\fR" 4
 Print the version and exit.
-.IP "\fB\-X\fR" 4
-Enables binary rewriting "with" control-flow recovery.  This
-usually makes the rewritten binary much faster, but may
-introduce rewriting bugs if the built-in recovery analysis is
-inaccurate.
 .SH "SEE ALSO"
 \fIe9patch\fR(1), \fIe9compile\fR(1), \fIe9afl\fR(1), \fIredfat\fR(1)
 .SH AUTHOR

src/e9tool/e9misc.cpp

@@ -226,6 +226,12 @@ void usage(FILE *stream, const char *progname)
         "\t--backend PROG\n"
         "\t\tUse PROG as the backend.  The default is \"e9patch\".\n"
         "\n"
+        "\t-CFR, -X\n"
+        "\t\tEnables binary rewriting \"with\" control-flow recovery.  This\n"
+        "\t\tusually makes the rewritten binary much faster, but may\n"
+        "\t\tintroduce rewriting bugs if the built-in recovery analysis is\n"
+        "\t\tinaccurate.\n"
+        "\n"
         "\t--compression N, -c N\n"
         "\t\tSet the compression level to be N, where N is a number within\n"
         "\t\tthe range 0..9.  The default is 9 for maximum compression.\n"
@@ -344,12 +350,6 @@ void usage(FILE *stream, const char *progname)
         "\n"
         "\t--version\n"
         "\t\tPrint the version and exit.\n"
-        "\n"
-        "\t-X\n"
-        "\t\tEnables binary rewriting \"with\" control-flow recovery.  This\n"
-        "\t\tusually makes the rewritten binary much faster, but may\n"
-        "\t\tintroduce rewriting bugs if the built-in recovery analysis is\n"
-        "\t\tinaccurate.\n"
         "\n", progname);
 }
 

src/e9tool/e9tool.cpp

@@ -653,6 +653,7 @@ static void checkCompatible(const ELF &elf, const ELF &target)
 enum Option
 {
     OPTION_BACKEND,
+    OPTION_CFR,
     OPTION_COMPRESSION,
     OPTION_DSYNC,
     OPTION_DTHRESHOLD,
@@ -729,6 +730,7 @@ int main_2(int argc, char **argv)
     static const struct option long_options[] =
     {
         {"backend",       req_arg, nullptr, OPTION_BACKEND},
+        {"CFR",           no_arg,  nullptr, OPTION_CFR},
         {"compression",   req_arg, nullptr, OPTION_COMPRESSION},
         {"Dsync",         req_arg, nullptr, OPTION_DSYNC},
         {"Dthreshold",    req_arg, nullptr, OPTION_DTHRESHOLD},
@@ -787,6 +789,10 @@ int main_2(int argc, char **argv)
             case OPTION_BACKEND:
                 option_backend = optarg;
                 break;
+            case OPTION_CFR:
+            case 'X':
+                option_CFR = true;
+                break;
             case OPTION_COMPRESSION:
             case 'c':
                 option_compression_level = (unsigned)parseIntOptArg(
@@ -938,9 +944,6 @@ int main_2(int argc, char **argv)
             case OPTION_VERSION:
                 puts("E9Tool " STRING(VERSION));
                 return EXIT_SUCCESS;
-            case 'X':
-                option_CFR = true;
-                break;
             default:
                 error("failed to parse command-line options; try `--help' "
                     "for more information");