otool -s __TEXT __text -V a.out
a.out:
(__TEXT,__text) section
start:
0100000a00    pushq   $0x0
0100000a02    movq    %rsp, %rbp
0100000a05    andq    $0xfffffffffffffff0, %rsp
0100000a09    movq    0x8(%rbp), %rdi
0100000a0d    leaq    0x10(%rbp), %rsi
0100000a11    movl    %edi, %edx
0100000a13    addl    $0x1, %edx
0100000a16    shll    $0x3, %edx
0100000a19    addq    %rsi, %rdx
0100000a1c    movq    %rdx, %rcx
0100000a1f    jmp 0x100000a25
0100000a21    addq    $0x8, %rcx
0100000a25    cmpq    $0x0, (%rcx)
0100000a29    jne 0x100000a21
0100000a2b    addq    $0x8, %rcx
0100000a2f    callq   _main
0100000a34    movl    %eax, %edi
0100000a36    callq   0x100000dc0 ## symbol stub for: _exit
0100000a3b    hlt
0100000a3c    nop
0100000a3d    nop
0100000a3e    nop
0100000a3f    nop
_main:
0100000a40    pushq   %rbp
0100000a41    movq    %rsp, %rbp
0100000a44    subq    $0x150, %rsp
0100000a4b    movl    %edi, 0xfffffffffffffffc(%rbp)
0100000a4e    movq    %rsi, 0xfffffffffffffff0(%rbp)
0100000a52    movl    $0x1000, 0xffffffffffffffbc(%rbp)
0100000a59    xorb    %al, %al
0100000a5b    leaq    0x406(%rip), %rdi ## literal pool for:  fragCheck A00,  
0100000a62    callq   0x100000dde ## symbol stub for: _printf
0100000a67    movl    0xfffffffffffffffc(%rbp), %ecx
0100000a6a    cmpl    $0x1, %ecx
0100000a6d    movl    %eax, 0xffffffffffffff0c(%rbp)
0100000a73    jg  0x100000a93
0100000a75    leaq    0x3fe(%rip), %rdi ## literal pool for:  frag  file   [blockjump] .
0100000a7c    callq   0x100000de4 ## symbol stub for: _puts
0100000a81    movl    $0x1, 0xffffffffffffffe8(%rbp)
0100000a88    movl    %eax, 0xffffffffffffff08(%rbp)
0100000a8e    jmpq    0x100000da1
0100000a93    movl    0xfffffffffffffffc(%rbp), %eax
0100000a96    cmpl    $0x3, %eax
0100000a99    jne 0x100000aab
0100000a9b    movq    0xfffffffffffffff0(%rbp), %rax
0100000a9f    movq    0x10(%rax), %rdi
0100000aa3    callq   0x100000db4 ## symbol stub for: _atoi
0100000aa8    movl    %eax, 0xffffffffffffffbc(%rbp)
0100000aab    leaq    0xffffffffffffff28(%rbp), %rsi
0100000ab2    movq    %rsi, 0xffffffffffffff00(%rbp)
0100000ab9    movl    0xffffffffffffffbc(%rbp), %esi
0100000abc    xorb    %al, %al
0100000abe    leaq    0x3d1(%rip), %rdi ## literal pool for: Using block size of %d

0100000ac5    callq   0x100000dde ## symbol stub for: _printf
0100000aca    movq    0xfffffffffffffff0(%rbp), %rdi
0100000ace    movq    0x8(%rdi), %rdi
0100000ad2    movq    0xffffffffffffff00(%rbp), %rsi
0100000ad9    movl    %eax, 0xfffffffffffffefc(%rbp)
0100000adf    callq   0x100000dea ## symbol stub for: _stat$INODE64
0100000ae4    movl    %eax, 0xffffffffffffffc0(%rbp)
0100000ae7    movl    0xffffffffffffffc0(%rbp), %eax
0100000aea    cmpl    $0x0, %eax
0100000aed    jne 0x100000b02
0100000aef    movzwl  0xffffffffffffff2c(%rbp), %eax
0100000af6    andl    $0xf000, %eax
0100000afb    cmpl    $0x8000, %eax
0100000b00    je  0x100000b37
0100000b02    movq    0x52f(%rip), %rax
0100000b09    movq    0xfffffffffffffff0(%rbp), %rcx
0100000b0d    movq    0x8(%rcx), %rcx
0100000b11    movq    (%rax), %rdi
0100000b14    movl    0xffffffffffffffc0(%rbp), %edx
0100000b17    xorb    %al, %al
0100000b19    leaq    0x390(%rip), %rsi ## literal pool for: Error %d issuing stat %s or file is not regular file.

0100000b20    callq   0x100000dcc ## symbol stub for: _fprintf
0100000b25    movl    $0x1, 0xffffffffffffffe8(%rbp)
0100000b2c    movl    %eax, 0xfffffffffffffef8(%rbp)
0100000b32    jmpq    0x100000da1
0100000b37    movq    0xfffffffffffffff0(%rbp), %rax
0100000b3b    movq    0x8(%rax), %rdi
0100000b3f    xorl    %esi, %esi
0100000b41    xorb    %al, %al
0100000b43    callq   0x100000dd8 ## symbol stub for: _open
0100000b48    movl    %eax, 0xffffffffffffff24(%rbp)
0100000b4e    movl    0xffffffffffffff24(%rbp), %eax
0100000b54    cmpl    $0xffffffffffffffff, %eax
0100000b57    jne 0x100000b91
0100000b59    movq    0x4d8(%rip), %rax
0100000b60    movq    0xfffffffffffffff0(%rbp), %rcx
0100000b64    movq    0x8(%rcx), %rcx
0100000b68    movq    (%rax), %rdi
0100000b6b    movl    0xffffffffffffff24(%rbp), %edx
0100000b71    xorb    %al, %al
0100000b73    leaq    0x36e(%rip), %rsi ## literal pool for: Error %d or file not found: %s

0100000b7a    callq   0x100000dcc ## symbol stub for: _fprintf
0100000b7f    movl    $0x1, 0xffffffffffffffe8(%rbp)
0100000b86    movl    %eax, 0xfffffffffffffef4(%rbp)
0100000b8c    jmpq    0x100000da1
0100000b91    movabsq $0x0, %rax
0100000b9b    movl    $0x2, %edx
0100000ba0    movl    %edx, 0xfffffffffffffef0(%rbp)
0100000ba6    movl    $0x1, %edx
0100000bab    movl    0xffffffffffffff24(%rbp), %edi
0100000bb1    movq    %rax, %rsi
0100000bb4    movq    %rax, 0xfffffffffffffee8(%rbp)
0100000bbb    callq   0x100000dd2 ## symbol stub for: _lseek
0100000bc0    movl    %eax, %edx
0100000bc2    movl    %edx, 0xffffffffffffffcc(%rbp)
0100000bc5    movl    0xffffffffffffff24(%rbp), %edi
0100000bcb    movq    0xfffffffffffffee8(%rbp), %rsi
0100000bd2    movl    0xfffffffffffffef0(%rbp), %edx
0100000bd8    callq   0x100000dd2 ## symbol stub for: _lseek
0100000bdd    movl    %eax, %edx
0100000bdf    movl    %edx, 0xffffffffffffffc8(%rbp)
0100000be2    movl    0xffffffffffffffcc(%rbp), %esi
0100000be5    movl    0xffffffffffffffc8(%rbp), %edx
0100000be8    xorb    %al, %al
0100000bea    leaq    0x317(%rip), %rdi ## literal pool for: start: %8d;  end: %8d,
0100000bf1    callq   0x100000dde ## symbol stub for: _printf
0100000bf6    movq    $0x0, 0xffffffffffffff18(%rbp)
0100000c01    movl    $0x1, 0xffffffffffffff14(%rbp)
0100000c0b    movl    $0x1, 0xffffffffffffff10(%rbp)
0100000c15    movl    $0x0, 0xffffffffffffffc4(%rbp)
0100000c1c    movl    %eax, 0xfffffffffffffee4(%rbp)
0100000c22    jmpq    0x100000cd1
0100000c27    movl    $0x0, %edx
0100000c2c    movl    0xffffffffffffff10(%rbp), %eax
0100000c32    addl    $0x1, %eax
0100000c35    movl    %eax, 0xffffffffffffff10(%rbp)
0100000c3b    movslq  0xffffffffffffffc4(%rbp), %rsi
0100000c3f    movl    0xffffffffffffff24(%rbp), %edi
0100000c45    callq   0x100000dd2 ## symbol stub for: _lseek
0100000c4a    movl    0xffffffffffffff24(%rbp), %edi
0100000c50    movl    $0x31, %esi
0100000c55    leaq    0xffffffffffffffd0(%rbp), %rdx
0100000c59    movq    %rax, 0xfffffffffffffed8(%rbp)
0100000c60    xorb    %al, %al
0100000c62    callq   0x100000dc6 ## symbol stub for: _fcntl
0100000c67    movq    0xffffffffffffffdc(%rbp), %rdx
0100000c6b    movq    0xffffffffffffff18(%rbp), %rcx
0100000c72    cmpq    %rcx, %rdx
0100000c75    movl    %eax, 0xfffffffffffffed4(%rbp)
0100000c7b    je  0x100000cae
0100000c7d    movq    0xffffffffffffffdc(%rbp), %rax
0100000c81    movslq  0xffffffffffffffbc(%rbp), %rcx
0100000c85    subq    %rcx, %rax
0100000c88    movq    0xffffffffffffff18(%rbp), %rcx
0100000c8f    cmpq    %rcx, %rax
0100000c92    je  0x100000cae
0100000c94    movq    0xffffffffffffffdc(%rbp), %rsi
0100000c98    xorb    %al, %al
0100000c9a    leaq    0x27e(%rip), %rdi ## literal pool for: %jd; 
0100000ca1    callq   0x100000dde ## symbol stub for: _printf
0100000ca6    movl    %eax, 0xfffffffffffffed0(%rbp)
0100000cac    jmp 0x100000cbd
0100000cae    movl    0xffffffffffffff14(%rbp), %eax
0100000cb4    addl    $0x1, %eax
0100000cb7    movl    %eax, 0xffffffffffffff14(%rbp)
0100000cbd    movq    0xffffffffffffffdc(%rbp), %rax
0100000cc1    movq    %rax, 0xffffffffffffff18(%rbp)
0100000cc8    movl    0xffffffffffffffc4(%rbp), %ecx
0100000ccb    addl    0xffffffffffffffbc(%rbp), %ecx
0100000cce    movl    %ecx, 0xffffffffffffffc4(%rbp)
0100000cd1    movl    0xffffffffffffffc8(%rbp), %eax
0100000cd4    subl    0xffffffffffffffbc(%rbp), %eax
0100000cd7    movl    0xffffffffffffffc4(%rbp), %ecx
0100000cda    cmpl    %ecx, %eax
0100000cdc    jg  0x100000c27
0100000ce2    movabsq $0x64, %rax
0100000cec    cvtsi2sdq   %rax, %xmm0
0100000cf1    movl    0xffffffffffffff14(%rbp), %esi
0100000cf7    xorb    %al, %al
0100000cf9    leaq    0x225(%rip), %rdi ## literal pool for: 
contiguous : %d; 
0100000d00    movsd   %xmm0, 0xfffffffffffffec8(%rbp)
0100000d08    callq   0x100000dde ## symbol stub for: _printf
0100000d0d    movl    0xffffffffffffff10(%rbp), %esi
0100000d13    movl    %eax, 0xfffffffffffffec4(%rbp)
0100000d19    xorb    %al, %al
0100000d1b    leaq    0x216(%rip), %rdi ## literal pool for: total : %d; 
0100000d22    callq   0x100000dde ## symbol stub for: _printf
0100000d27    movl    0xffffffffffffff10(%rbp), %esi
0100000d2d    subl    0xffffffffffffff14(%rbp), %esi
0100000d33    movl    %eax, 0xfffffffffffffec0(%rbp)
0100000d39    xorb    %al, %al
0100000d3b    leaq    0x203(%rip), %rdi ## literal pool for: extents: %d; 
0100000d42    callq   0x100000dde ## symbol stub for: _printf
0100000d47    cvtsi2ssl   0xffffffffffffff14(%rbp), %xmm0
0100000d4f    cvtss2sd    %xmm0, %xmm0
0100000d53    movsd   0xfffffffffffffec8(%rbp), %xmm1
0100000d5b    mulsd   %xmm1, %xmm0
0100000d5f    cvtsi2ssl   0xffffffffffffff10(%rbp), %xmm2
0100000d67    cvtss2sd    %xmm2, %xmm2
0100000d6b    divsd   %xmm2, %xmm0
0100000d6f    movl    %eax, 0xfffffffffffffebc(%rbp)
0100000d75    movb    $0x1, %al
0100000d77    leaq    0x1d5(%rip), %rdi ## literal pool for:  %.0f%% contiguous

0100000d7e    callq   0x100000dde ## symbol stub for: _printf
0100000d83    movl    0xffffffffffffff24(%rbp), %edi
0100000d89    movl    %eax, 0xfffffffffffffeb8(%rbp)
0100000d8f    callq   0x100000dba ## symbol stub for: _close
0100000d94    movl    $0x0, 0xffffffffffffffe8(%rbp)
0100000d9b    movl    %eax, 0xfffffffffffffeb4(%rbp)
0100000da1    movl    0xffffffffffffffe8(%rbp), %eax
0100000da4    movl    %eax, 0xffffffffffffffec(%rbp)
0100000da7    movl    0xffffffffffffffec(%rbp), %eax
0100000daa    addq    $0x150, %rsp
0100000db1    popq    %rbp
0100000db2    ret