added:

lab/prof/
  lab/prof/Makefile
  lab/prof/main
  lab/prof/main.c
  lab/prof/main.s

lab/prof/Makefile

@@ -0,0 +1,6 @@
+
+main: main.c
+	gcc -m64 -O3 -Wall main.c -o main
+
+main.s: main.c
+	gcc -m64 -O3 -Wall -fomit-frame-pointer -fno-PIC -S main.c

lab/prof/main.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+long long foo(long long int x){
+  return x+1;
+}
+
+#include <stdlib.h>
+int main(int argc, char** argv){
+  fprintf(stderr, "sizeof(long long int)=%ld\n", 
+      sizeof(long long int));
+  long long int x = 57;
+  x = foo(x);
+  exit(-1);
+}

lab/prof/main.s

@@ -0,0 +1,77 @@
+	.text
+.globl _foo
+_foo:
+LFB3:
+	leaq	1(%rdi), %rax
+	ret
+LFE3:
+	.cstring
+LC0:
+	.ascii "sizeof(long long int)=%ld\12\0"
+	.text
+.globl _main
+_main:
+LFB20:
+	subq	$8, %rsp
+LCFI0:
+	movl	$8, %edx
+	leaq	LC0(%rip), %rsi
+	movq	___stderrp@GOTPCREL(%rip), %rax
+	movq	(%rax), %rdi
+	xorl	%eax, %eax
+	call	_fprintf
+	movl	$-1, %edi
+	call	_exit
+LFE20:
+	.section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support
+EH_frame1:
+	.set L$set$0,LECIE1-LSCIE1
+	.long L$set$0
+LSCIE1:
+	.long	0x0
+	.byte	0x1
+	.ascii "zR\0"
+	.byte	0x1
+	.byte	0x78
+	.byte	0x10
+	.byte	0x1
+	.byte	0x10
+	.byte	0xc
+	.byte	0x7
+	.byte	0x8
+	.byte	0x90
+	.byte	0x1
+	.align 3
+LECIE1:
+	.globl _foo.eh
+_foo.eh:
+LSFDE1:
+	.set L$set$1,LEFDE1-LASFDE1
+	.long L$set$1
+LASFDE1:
+	.long	LASFDE1-EH_frame1
+	.quad	LFB3-.
+	.set L$set$2,LFE3-LFB3
+	.quad L$set$2
+	.byte	0x0
+	.align 3
+LEFDE1:
+	.globl _main.eh
+_main.eh:
+LSFDE3:
+	.set L$set$3,LEFDE3-LASFDE3
+	.long L$set$3
+LASFDE3:
+	.long	LASFDE3-EH_frame1
+	.quad	LFB20-.
+	.set L$set$4,LFE20-LFB20
+	.quad L$set$4
+	.byte	0x0
+	.byte	0x4
+	.set L$set$5,LCFI0-LFB20
+	.long L$set$5
+	.byte	0xe
+	.byte	0x10
+	.align 3
+LEFDE3:
+	.subsections_via_symbols