1、将C文件生成中间汇编
deepfuture@deepfuture-laptop:~/private/mytest$ gcc -S hello.c
.file "hello.c"
.section .rodata
.LC0:
.string "hello,world"
.text
.globl main
.type main, @function
main:
pushl %ebp
movl %esp, %ebp
andl $-16, %esp
subl $16, %esp
movl $.LC0, (%esp)
call puts
movl $0, (%esp)
call exit
.size main, .-main
.ident "GCC: (Ubuntu 4.4.3-4ubuntu5) 4.4.3"
.section .note.GNU-stack,"",@progbits
2、gdb调试
deepfuture@deepfuture-laptop:~/private/mytest$ gcc -gstabs -o hello hello.c
hello.c: In function ‘main’:
hello.c:4: warning: incompatible implicit declaration of built-in function ‘exit’
deepfuture@deepfuture-laptop:~/private/mytest$ gdb
GNU gdb (GDB) 7.1-ubuntu
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
(gdb) file hello
Reading symbols from /home/deepfuture/private/mytest/hello...done.
(gdb) list
1 #include <stdio.h>
2 int main(){
3 printf("hello,world\n");
4 exit(0);
5 }
(gdb) break 3
Breakpoint 1 at 0x804841d: file hello.c, line 3.
(gdb) run
Starting program: /home/deepfuture/private/mytest/hello
Breakpoint 1, main () at hello.c:3
3 printf("hello,world\n");
(gdb) c
Continuing.
hello,world
Program exited normally.
(gdb) quit
3、gprof图表简档，可进行程序相关性能统计，可统计出每个函数的调用时间 和处理器时间
deepfuture@deepfuture-laptop:~/private/mytest$ gcc -pg -o hello hello.c
hello.c: In function ‘main’:
hello.c:4: warning: incompatible implicit declaration of built-in function ‘exit’
deepfuture@deepfuture-laptop:~/private/mytest$ ./hello
hello,world
deepfuture@deepfuture-laptop:~/private/mytest$ gprof hello>myhello.txt
deepfuture@deepfuture-laptop:~/private/mytest$ cat myhello.txt
Flat profile:
Each sample counts as 0.01 seconds.
no time accumulated
% cumulative self self total
time seconds seconds calls Ts/call Ts/call name
% the percentage of the total running time of the
time program used by this function.
cumulative a running sum of the number of seconds accounted
seconds for by this function and those listed above it.
self the number of seconds accounted for by this
seconds function alone. This is the major sort for this
listing.
calls the number of times this function was invoked, if
this function is profiled, else blank.
self the average number of milliseconds spent in this
ms/call function per call, if this function is profiled,
else blank.
total the average number of milliseconds spent in this
ms/call function and its descendents per call, if this
function is profiled, else blank.
name the name of the function. This is the minor sort
for this listing. The index shows the location of
the function in the gprof listing. If the index is
in parenthesis it shows where it would appear in
the gprof listing if it were to be printed.
4、反汇编objdump
deepfuture@deepfuture-laptop:~/private/mytest$ objdump -d hello
hello: file format elf32-i386
Disassembly of section .init:
080482dc <_init>:
80482dc: 55 push %ebp
80482dd: 89 e5 mov %esp,%ebp
80482df: 53 push %ebx
80482e0: 83 ec 04 sub $0x4,%esp
80482e3: e8 00 00 00 00 call 80482e8 <_init+0xc>
80482e8: 5b pop %ebx
80482e9: 81 c3 0c 1d 00 00 add $0x1d0c,%ebx
80482ef: 8b 93 fc ff ff ff mov -0x4(%ebx),%edx
80482f5: 85 d2 test %edx,%edx
80482f7: 74 05 je 80482fe <_init+0x22>
80482f9: e8 1e 00 00 00 call 804831c <__gmon_start__@plt>
80482fe: e8 ed 00 00 00 call 80483f0 <frame_dummy>
8048303: e8 a8 01 00 00 call 80484b0 <__do_global_ctors_aux>
8048308: 58 pop %eax
8048309: 5b pop %ebx
804830a: c9 leave
804830b: c3 ret
Disassembly of section .plt:
0804830c <__gmon_start__@plt-0x10>:
804830c: ff 35 f8 9f 04 08 pushl 0x8049ff8
8048312: ff 25 fc 9f 04 08 jmp *0x8049ffc
8048318: 00 00 add %al,(%eax)
...
0804831c <__gmon_start__@plt>:
804831c: ff 25 00 a0 04 08 jmp *0x804a000
8048322: 68 00 00 00 00 push $0x0
8048327: e9 e0 ff ff ff jmp 804830c <_init+0x30>
0804832c <__libc_start_main@plt>:
804832c: ff 25 04 a0 04 08 jmp *0x804a004
8048332: 68 08 00 00 00 push $0x8
8048337: e9 d0 ff ff ff jmp 804830c <_init+0x30>
0804833c <puts@plt>:
804833c: ff 25 08 a0 04 08 jmp *0x804a008
8048342: 68 10 00 00 00 push $0x10
8048347: e9 c0 ff ff ff jmp 804830c <_init+0x30>
0804834c <exit@plt>:
804834c: ff 25 0c a0 04 08 jmp *0x804a00c
8048352: 68 18 00 00 00 push $0x18
8048357: e9 b0 ff ff ff jmp 804830c <_init+0x30>
Disassembly of section .text:
08048360 <_start>:
8048360: 31 ed xor %ebp,%ebp
8048362: 5e pop %esi
8048363: 89 e1 mov %esp,%ecx
8048365: 83 e4 f0 and $0xfffffff0,%esp
8048368: 50 push %eax
8048369: 54 push %esp
804836a: 52 push %edx
804836b: 68 40 84 04 08 push $0x8048440
8048370: 68 50 84 04 08 push $0x8048450
8048375: 51 push %ecx
8048376: 56 push %esi
8048377: 68 14 84 04 08 push $0x8048414
804837c: e8 ab ff ff ff call 804832c <__libc_start_main@plt>
8048381: f4 hlt
8048382: 90 nop
8048383: 90 nop
8048384: 90 nop
8048385: 90 nop
8048386: 90 nop
8048387: 90 nop
8048388: 90 nop
8048389: 90 nop
804838a: 90 nop
804838b: 90 nop
804838c: 90 nop
804838d: 90 nop
804838e: 90 nop
804838f: 90 nop
08048390 <__do_global_dtors_aux>:
8048390: 55 push %ebp
8048391: 89 e5 mov %esp,%ebp
8048393: 53 push %ebx
8048394: 83 ec 04 sub $0x4,%esp
8048397: 80 3d 18 a0 04 08 00 cmpb $0x0,0x804a018
804839e: 75 3f jne 80483df <__do_global_dtors_aux+0x4f>
80483a0: a1 1c a0 04 08 mov 0x804a01c,%eax
80483a5: bb 18 9f 04 08 mov $0x8049f18,%ebx
80483aa: 81 eb 14 9f 04 08 sub $0x8049f14,%ebx
80483b0: c1 fb 02 sar $0x2,%ebx
80483b3: 83 eb 01 sub $0x1,%ebx
80483b6: 39 d8 cmp %ebx,%eax
80483b8: 73 1e jae 80483d8 <__do_global_dtors_aux+0x48>
80483ba: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
80483c0: 83 c0 01 add $0x1,%eax
80483c3: a3 1c a0 04 08 mov %eax,0x804a01c
80483c8: ff 14 85 14 9f 04 08 call *0x8049f14(,%eax,4)
80483cf: a1 1c a0 04 08 mov 0x804a01c,%eax
80483d4: 39 d8 cmp %ebx,%eax
80483d6: 72 e8 jb 80483c0 <__do_global_dtors_aux+0x30>
80483d8: c6 05 18 a0 04 08 01 movb $0x1,0x804a018
80483df: 83 c4 04 add $0x4,%esp
80483e2: 5b pop %ebx
80483e3: 5d pop %ebp
80483e4: c3 ret
80483e5: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
80483e9: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
080483f0 <frame_dummy>:
80483f0: 55 push %ebp
80483f1: 89 e5 mov %esp,%ebp
80483f3: 83 ec 18 sub $0x18,%esp
80483f6: a1 1c 9f 04 08 mov 0x8049f1c,%eax
80483fb: 85 c0 test %eax,%eax
80483fd: 74 12 je 8048411 <frame_dummy+0x21>
80483ff: b8 00 00 00 00 mov $0x0,%eax
8048404: 85 c0 test %eax,%eax
8048406: 74 09 je 8048411 <frame_dummy+0x21>
8048408: c7 04 24 1c 9f 04 08 movl $0x8049f1c,(%esp)
804840f: ff d0 call *%eax
8048411: c9 leave
8048412: c3 ret
8048413: 90 nop
08048414 <main>:
8048414: 55 push %ebp
8048415: 89 e5 mov %esp,%ebp
8048417: 83 e4 f0 and $0xfffffff0,%esp
804841a: 83 ec 10 sub $0x10,%esp
804841d: c7 04 24 00 85 04 08 movl $0x8048500,(%esp)
8048424: e8 13 ff ff ff call 804833c <puts@plt>
8048429: c7 04 24 00 00 00 00 movl $0x0,(%esp)
8048430: e8 17 ff ff ff call 804834c <exit@plt>
8048435: 90 nop
8048436: 90 nop
8048437: 90 nop
8048438: 90 nop
8048439: 90 nop
804843a: 90 nop
804843b: 90 nop
804843c: 90 nop
804843d: 90 nop
804843e: 90 nop
804843f: 90 nop
08048440 <__libc_csu_fini>:
8048440: 55 push %ebp
8048441: 89 e5 mov %esp,%ebp
8048443: 5d pop %ebp
8048444: c3 ret
8048445: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
8048449: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
08048450 <__libc_csu_init>:
8048450: 55 push %ebp
8048451: 89 e5 mov %esp,%ebp
8048453: 57 push %edi
8048454: 56 push %esi
8048455: 53 push %ebx
8048456: e8 4f 00 00 00 call 80484aa <__i686.get_pc_thunk.bx>
804845b: 81 c3 99 1b 00 00 add $0x1b99,%ebx
8048461: 83 ec 1c sub $0x1c,%esp
8048464: e8 73 fe ff ff call 80482dc <_init>
8048469: 8d bb 18 ff ff ff lea -0xe8(%ebx),%edi
804846f: 8d 83 18 ff ff ff lea -0xe8(%ebx),%eax
8048475: 29 c7 sub %eax,%edi
8048477: c1 ff 02 sar $0x2,%edi
804847a: 85 ff test %edi,%edi
804847c: 74 24 je 80484a2 <__libc_csu_init+0x52>
804847e: 31 f6 xor %esi,%esi
8048480: 8b 45 10 mov 0x10(%ebp),%eax
8048483: 89 44 24 08 mov %eax,0x8(%esp)
8048487: 8b 45 0c mov 0xc(%ebp),%eax
804848a: 89 44 24 04 mov %eax,0x4(%esp)
804848e: 8b 45 08 mov 0x8(%ebp),%eax
8048491: 89 04 24 mov %eax,(%esp)
8048494: ff 94 b3 18 ff ff ff call *-0xe8(%ebx,%esi,4)
804849b: 83 c6 01 add $0x1,%esi
804849e: 39 fe cmp %edi,%esi
80484a0: 72 de jb 8048480 <__libc_csu_init+0x30>
80484a2: 83 c4 1c add $0x1c,%esp
80484a5: 5b pop %ebx
80484a6: 5e pop %esi
80484a7: 5f pop %edi
80484a8: 5d pop %ebp
80484a9: c3 ret
080484aa <__i686.get_pc_thunk.bx>:
80484aa: 8b 1c 24 mov (%esp),%ebx
80484ad: c3 ret
80484ae: 90 nop
80484af: 90 nop
080484b0 <__do_global_ctors_aux>:
80484b0: 55 push %ebp
80484b1: 89 e5 mov %esp,%ebp
80484b3: 53 push %ebx
80484b4: 83 ec 04 sub $0x4,%esp
80484b7: a1 0c 9f 04 08 mov 0x8049f0c,%eax
80484bc: 83 f8 ff cmp $0xffffffff,%eax
80484bf: 74 13 je 80484d4 <__do_global_ctors_aux+0x24>
80484c1: bb 0c 9f 04 08 mov $0x8049f0c,%ebx
80484c6: 66 90 xchg %ax,%ax
80484c8: 83 eb 04 sub $0x4,%ebx
80484cb: ff d0 call *%eax
80484cd: 8b 03 mov (%ebx),%eax
80484cf: 83 f8 ff cmp $0xffffffff,%eax
80484d2: 75 f4 jne 80484c8 <__do_global_ctors_aux+0x18>
80484d4: 83 c4 04 add $0x4,%esp
80484d7: 5b pop %ebx
80484d8: 5d pop %ebp
80484d9: c3 ret
80484da: 90 nop
80484db: 90 nop
Disassembly of section .fini:
080484dc <_fini>:
80484dc: 55 push %ebp
80484dd: 89 e5 mov %esp,%ebp
80484df: 53 push %ebx
80484e0: 83 ec 04 sub $0x4,%esp
80484e3: e8 00 00 00 00 call 80484e8 <_fini+0xc>
80484e8: 5b pop %ebx
80484e9: 81 c3 0c 1b 00 00 add $0x1b0c,%ebx
80484ef: e8 9c fe ff ff call 8048390 <__do_global_dtors_aux>
80484f4: 59 pop %ecx
80484f5: 5b pop %ebx
80484f6: c9 leave
80484f7: c3 ret
deepfuture@deepfuture-laptop:~/private/mytest$ gcc -c hello.c
hello.c: In function ‘main’:
hello.c:4: warning: incompatible implicit declaration of built-in function ‘exit’
deepfuture@deepfuture-laptop:~/private/mytest$ objdump -d hello.o
hello.o: file format elf32-i386
Disassembly of section .text:
00000000 <main>:
0: 55 push %ebp
1: 89 e5 mov %esp,%ebp
3: 83 e4 f0 and $0xfffffff0,%esp
6: 83 ec 10 sub $0x10,%esp
9: c7 04 24 00 00 00 00 movl $0x0,(%esp)
10: e8 fc ff ff ff call 11 <main+0x11>
15: c7 04 24 00 00 00 00 movl $0x0,(%esp)
1c: e8 fc ff ff ff call 1d <main+0x1d>
deepfuture@deepfuture-laptop:~/private/mytest$
扫一扫
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
