arm gdb 调试回调函数
时间：2023-04-04 17:37:00
#include
int add(int a, int b)
{
return a b;
}
int mul(int a, int b)
{
return a * b;
}
int callback_self(int a, int b, int (*rec)(int c, int d))
{
return rec(a, b);
}
int main(int argc, char *argv[])
{
printf("[add = %d]\n",callback_self(3,3,add));
printf("[mul = %d]\n",callback_self(3,3,mul));
return 0;
}
反汇编：
00000000004005fc
4005fc: d10043ff sub sp, sp, #0x10 // sp=sp-0x10
400600: b9000fe0 str w0, [sp, #12] // [sp 12]=w0
400604: b9000be1 str w1, [sp, #8] // [sp 8]=w1
400608: b9400fe1 ldr w1, [sp, #12] // w1=[sp 12]
40060c: b9400be0 ldr w0, [sp, #8] // w0=[sp 8]
400610: 0b000020 add w0, w1, w0 // w0=w1 w0
400614: 910043ff add sp, sp, #0x10 // sp=sp 0x10
400618: d65f03c0 ret
000000000040061c
40061c: d10043ff sub sp, sp, #0x10 // sp=sp-0x10
400620: b9000fe0 str w0, [sp, #12] // [sp 12]=w0
400624: b9000be1 str w1, [sp, #8] // [sp 8]=w1
400628: b9400fe1 ldr w1, [sp, #12] // w1=[sp 12]
40062c: b9400be0 ldr w0, [sp, #8] // w0=[sp 8]
400630: 1b007c20 mul w0, w1, w0 // w0=w1*w0
400634: 910043ff add sp, sp, #0x10 // sp=sp 0x10
400638: d65f03c0 ret
/*
x29 0x7ffffff3f0 549755810800
x30 0x400690 4195984
sp 0x7ffffff3f0 0x7ffffff3f0
pc 0x40063c 0x40063c
*/
000000000040063c
40063c: a9be7bfd stp x29, x30, [sp, #-32]!
400640: 910003fd mov x29, sp // x29 = sp = 0x7ffffff3d0
400644: b9001fa0 str w0, [x29, #28] // 0x7ffffff3ec: 0xfffff41000000003
400648: b9001ba1 str w1, [x29, #24] // 0x7ffffff3e8: 0x0000000300000003
40064c: f9000ba2 str x2, [x29, #16] // 0x7ffffff3e0: 0x00000000004005fc
400650: f9400ba2 ldr x2, [x29, #16] // x2 = 0x4005fc
400654: b9401ba1 ldr w1, [x29, #24] // w1 = 3
400658: b9401fa0 ldr w0, [x29, #28] // w0 = 3
40065c: d63f0040 blr x2 // 0x4005fc(3, 3)
400660: a8c27bfd ldp x29, x30, [sp], #32
40064: d65f03c0 ret
/*
x29 0x7ffffff410 549755810832
x30 0x7fb7d9e6e0 548545357536
sp 0x7ffffff410 0x7ffffff410
pc 0x400668 0x400668
*/
0000000000400668
400668: a9be7bfd stp x29, x30, [sp, #-32]!
40066c: 910003fd mov x29, sp // x29 = sp = 0x7ffffff3f0
400670: b9001fa0 str w0, [x29, #28] // 0x7ffffff40c: 0x0000000000000001
400674: f9000ba1 str x1, [x29, #16] // 0x7ffffff400: 0x0000007ffffff548
400678: 90000000 adrp x0, 400000 <_init-0x480>
40067c: 9117f000 add x0, x0, #0x5fc // x0 = 0x4005fc
400680: aa0003e2 mov x2, x0 // x2 = 0x4005fc
400684: 52800061 mov w1, #0x3 // w1 = #3
400688: 52800060 mov w0, #0x3 // w0 = #3
40068c: 97ffffec bl 40063c
400690: 2a0003e1 mov w1, w0
400694: 90000000 adrp x0, 400000 <_init-0x480>
400698: 911e2000 add x0, x0, #0x788
40069c: 97ffff95 bl 4004f0
4006a0: 90000000 adrp x0, 400000 <_init-0x480>
4006a4: 91187000 add x0, x0, #0x61c // x0 = 0x40061c
4006a8: aa0003e2 mov x2, x0 // x2 = 0x40061c
4006ac: 52800061 mov w1, #0x3 // #3
4006b0: 52800060 mov w0, #0x3 // #3
4006b4: 97ffffe2 bl 40063c
4006b8: 2a0003e1 mov w1, w0
4006bc: 90000000 adrp x0, 400000 <_init-0x480>
4006c0: 911e6000 add x0, x0, #0x798 // 0x400798: 0x25203d206c756d5b
4006c4: 97ffff8b bl 4004f0
4006c8: 52800000 mov w0, #0x0 // #0
4006cc: a8c27bfd ldp x29, x30, [sp], #32
4006d0: d65f03c0 ret
