more stuff in README

README.md

@@ -28,10 +28,53 @@ Currently, only x86_64 is supported (but it's not too hard to add support for
 other instruction sets, 32-bit ELF support is a bit harder). The code looks for
 a `lea rdi, [rel <pcrel32>]` instruction near `_start`, this is often the
 instruction that loads `main` to pass it to `__libc_start_main` (at least on
-glibc and musl it is). This then gets overwritten *at runtime by *`ld.so` due
+glibc and musl it is). This then gets overwritten *at runtime by* `ld.so` due
 to a relocation of type `R_X86_64_PC32` targetting the `pcrel32` operand of
 that instruction --- all without touching any code of the executable.
 
+The result:
+
+```c
+int main(int argc, char** argv[]){
+	printf("hello, world\n");
+	return 42;
+}
+
+extern int main2(int argc, char** argv[]);
+int main2(int argc, char** argv[]) {
+	printf("be gay do crimes\n");
+	return 69;
+}
+```
+
+```
+$ ./hello.glibc
+hello, world
+$ ./manip-exe ./hello.glibc{,.manip}
+```
+
+```asm
+$ objdump -d hello.glibc.manip
+
+0000000000001050 <_start>:
+    1050:	31 ed                	xor    %ebp,%ebp
+    1052:	49 89 d1             	mov    %rdx,%r9
+    1055:	5e                   	pop    %rsi
+    1056:	48 89 e2             	mov    %rsp,%rdx
+    1059:	48 83 e4 f0          	and    $0xfffffffffffffff0,%rsp
+    105d:	50                   	push   %rax
+    105e:	54                   	push   %rsp
+    105f:	4c 8d 05 6a 01 00 00 	lea    0x16a(%rip),%r8      # 11d0 <__libc_csu_fini>
+    1066:	48 8d 0d 03 01 00 00 	lea    0x103(%rip),%rcx     # 1170 <__libc_csu_init>
+    106d:	48 8d 3d c1 00 00 00 	lea    0xc1(%rip),%rdi      # 1135 <main>
+    1074:	ff 15 66 2f 00 00    	callq  *0x2f66(%rip)        # 3fe0 <__libc_start_main@GLIBC_2.2.5>
+```
+
+```
+$ ./hello.glibc.manip
+be gay do crimes
+```
+
 ## Usage
 
 ```sh