第一個:
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后來別人通過反匯編發現的情況:
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如下紅色的幾行，main與strcmp此時為常量（你也會發現沒有.data段），在匯編代碼中他是把這兩個常量寫入函數堆棧，然后調用函數，作出對比，然后輸出。而你所說的 f ，也就是函數參數，實際上它只作為預分配的參考（匯編代碼中，你是找不到 f 的）。
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.file "1.c"
.text
.globl main
.type main, @function
main:
leal 4(%esp), %ecx
andl $-16, %esp
pushl -4(%ecx)
pushl %ebp
movl %esp, %ebp
pushl %ecx
subl $4, %esp
movl $strcmp, (%esp)
call tell_me
movl $main, %eax
movl %eax, (%esp)
call tell_me
movl $0, %eax
addl $4, %esp
popl %ecx
popl %ebp
leal -4(%ecx), %esp
ret
.size main, .-main
.section .rodata
.LC0:
.string "Address of strcmp(): %p/n"
.LC1:
.string "Function address: %p/n"
.text
.globl tell_me
.type tell_me, @function
tell_me:
pushl %ebp
movl %esp, %ebp
subl $8, %esp
cmpl $strcmp, 8(%ebp)
jne .L4
movl 8(%ebp), %eax
movl %eax, 4(%esp)
movl $.LC0, (%esp)
call printf
jmp .L6
.L4:
movl 8(%ebp), %eax
movl %eax, 4(%esp)
movl $.LC1, (%esp)
call printf
.L6:
leave
ret
.size tell_me, .-tell_me
.ident "GCC: (Ubuntu 4.3.3-5ubuntu4) 4.3.3"
.section .note.GNU-stack,"",@progbits
==================================================
00401090 push ebp //第一題的反匯編
00401091 mov ebp,esp
00401093 sub esp,40h
00401096 push ebx
00401097 push esi
00401098 push edi
00401099 lea edi,[ebp-40h]
0040109C mov ecx,10h
004010A1 mov eax,0CCCCCCCCh //應該說在函數傳遞時，f與strcmp的地址都相同
004010A6 rep stos dword ptr [edi]
13: printf("%0x/t%0x/n",f,strcmp); //看這里，輸出f與strcmp的地址是相同的
004010A8 push offset strcmp (004011a0)
004010AD mov eax,dword ptr [ebp+8]
004010B0 push eax
004010B1 push offset string "%0x/t%0x/n" (0042201c)
004010B6 call printf (00401120)
004010BB add esp,0Ch
14: if (f == strcmp) /* <-----我不理解這里*/ //比較后，輸出的地址同樣是一樣的，
004010BE cmp dword ptr [ebp+8],offset strcmp (004011a0)
004010C5 jne tell_me+4Ah (004010da)
15: printf("Address of strcmp(): %0x/n", f);
004010C7 mov ecx,dword ptr [ebp+8]
004010CA push ecx
004010CB push offset string "Address of strcmp(): %0x/n" (00422044)
004010D0 call printf (00401120)
004010D5 add esp,8
16: else
004010D8 jmp tell_me+5Bh (004010eb)
17: printf("Function address: %p/n", f);
004010DA mov edx,dword ptr [ebp+8]
004010DD push edx
004010DE push offset string "Function address: %p/n" (00422028)
004010E3 call printf (00401120)
004010E8 add esp,8=======================================================

第二個:
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