反汇编之C 多个参数传递

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博客展示了C语言函数`f1`的实现，并给出了在Intel x86_64和ARM架构下的汇编代码。在Intel平台上，`f1`使用标准调用约定，参数通过RDI, RSI, RDX, RCX, R8, R9寄存器传递，然后压栈。在ARM平台上，参数通过X0-X6寄存器传递，最后调用`printf`函数打印。`main`函数调用了`f1`并传入了从1到7的整数。

#include <stdio.h>

void f1(int a, int b, int c, int d, int e, int f, int g)
{
printf("%d %d %d %d %d %d %d\n", a, b, c, d, e, f, g);
}

int main()
{
f1(1, 2, 3, 4, 5, 6, 7);
}

#if 0

gcc: (RDI, RSI, RDX, RCX, R8, R9, rsp)

#endif

#if 0
/*
* intel
*/
0000000000001149 <f1>:
    1149:   f3 0f 1e fa             endbr64
    114d:   55                      push   %rbp
    114e:   48 89 e5                mov    %rsp,%rbp
    1151:   48 83 ec 20             sub    $0x20,%rsp
    1155:   89 7d fc                mov    %edi,-0x4(%rbp)
    1158:   89 75 f8                mov    %esi,-0x8(%rbp)
    115b:   89 55 f4                mov    %edx,-0xc(%rbp)
    115e:   89 4d f0                mov    %ecx,-0x10(%rbp)
    1161:   44 89 45 ec             mov    %r8d,-0x14(%rbp)
    1165:   44 89 4d e8             mov    %r9d,-0x18(%rbp)
    1169:   44 8b 45 ec             mov    -0x14(%rbp),%r8d
    116d:   8b 7d f0                mov    -0x10(%rbp),%edi
    1170:   8b 4d f4                mov    -0xc(%rbp),%ecx
    1173:   8b 55 f8                mov    -0x8(%rbp),%edx
    1176:   8b 45 fc                mov    -0x4(%rbp),%eax
    1179:   8b 75 10                mov    0x10(%rbp),%esi
    117c:   56                      push   %rsi
    117d:   8b 75 e8                mov    -0x18(%rbp),%esi
    1180:   56                      push   %rsi
    1181:   45 89 c1                mov    %r8d,%r9d
    1184:   41 89 f8                mov    %edi,%r8d
    1187:   89 c6                   mov    %eax,%esi
    1189:   48 8d 3d 74 0e 00 00    lea    0xe74(%rip),%rdi        # 2004 <_IO_stdin_used+0x4>
    1190:   b8 00 00 00 00          mov    $0x0,%eax
    1195:   e8 b6 fe ff ff          callq 1050 <printf@plt>
    119a:   48 83 c4 10             add    $0x10,%rsp
    119e:   90                      nop
    119f:   c9                      leaveq
    11a0:   c3                      retq

00000000000011a1 <main>:
    11a1:   f3 0f 1e fa             endbr64
    11a5:   55                      push   %rbp
    11a6:   48 89 e5                mov    %rsp,%rbp
    11a9:   48 83 ec 08             sub    $0x8,%rsp
    11ad:   6a 07                   pushq $0x7
    11af:   41 b9 06 00 00 00       mov    $0x6,%r9d
    11b5:   41 b8 05 00 00 00       mov    $0x5,%r8d
    11bb:   b9 04 00 00 00          mov    $0x4,%ecx
    11c0:   ba 03 00 00 00          mov    $0x3,%edx
    11c5:   be 02 00 00 00          mov    $0x2,%esi
    11ca:   bf 01 00 00 00          mov    $0x1,%edi
    11cf:   e8 75 ff ff ff          callq 1149 <f1>
    11d4:   48 83 c4 10             add    $0x10,%rsp
    11d8:   b8 00 00 00 00          mov    $0x0,%eax
    11dd:   c9                      leaveq
    11de:   c3                      retq
    11df:   90                      nop

/*
* arm
*/
000000000040055c <f1>:
40055c:   a9bd7bfd    stp   x29, x30, [sp, #-48]!
400560:   910003fd    mov   x29, sp
400564:   b9002fa0    str   w0, [x29, #44]
400568:   b9002ba1    str   w1, [x29, #40]
40056c:   b90027a2    str   w2, [x29, #36]
400570:   b90023a3    str   w3, [x29, #32]
400574:   b9001fa4    str   w4, [x29, #28]
400578:   b9001ba5    str   w5, [x29, #24]
40057c:   b90017a6    str   w6, [x29, #20]
400580:   90000000    adrp   x0, 400000 <_init-0x3e8>
400584:   911a6000    add   x0, x0, #0x698
400588:   b94017a7    ldr   w7, [x29, #20]
40058c:   b9401ba6    ldr   w6, [x29, #24]
400590:   b9401fa5    ldr   w5, [x29, #28]
400594:   b94023a4    ldr   w4, [x29, #32]
400598:   b94027a3    ldr   w3, [x29, #36]
40059c:   b9402ba2    ldr   w2, [x29, #40]
4005a0:   b9402fa1    ldr   w1, [x29, #44]
4005a4:   97ffffab    bl   400450 <printf@plt>
4005a8:   d503201f    nop
4005ac:   a8c37bfd    ldp   x29, x30, [sp], #48
4005b0:   d65f03c0    ret

00000000004005b4 <main>:
4005b4:   a9bf7bfd    stp   x29, x30, [sp, #-16]!
4005b8:   910003fd    mov   x29, sp
4005bc:   528000e6    mov   w6, #0x7                      // #7
4005c0:   528000c5    mov   w5, #0x6                      // #6
4005c4:   528000a4    mov   w4, #0x5                      // #5
4005c8:   52800083    mov   w3, #0x4                      // #4
4005cc:   52800062    mov   w2, #0x3                      // #3
4005d0:   52800041    mov   w1, #0x2                      // #2
4005d4:   52800020    mov   w0, #0x1                      // #1
4005d8:   97ffffe1    bl   40055c <f1>
4005dc:   52800000    mov   w0, #0x0                      // #0
4005e0:   a8c17bfd    ldp   x29, x30, [sp], #16
4005e4:   d65f03c0    ret

#endif