One mistake, my gcc version is actually 3.2.2:
gcc (GCC) 3.2.2 20030222 (Red Hat Linux 3.2.2-5)
Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There
is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.
I'm really suspecting the code it has compiled, objdump -S gives
almost no dissasembly line in pipe_wait, and with only -d, it gives
lots nop at the end of the function. see below:
pipe.o: file format elf32-i386
Disassembly of section .text:
00000000 <pipe_wait>:
0: 55 push %ebp
1: 57 push %edi
2: 56 push %esi
3: be 00 e0 ff ff mov $0xffffe000,%esi
8: 53 push %ebx
9: 21 e6 and %esp,%esi
b: 83 ec 20 sub $0x20,%esp
e: 8b 7c 24 34 mov 0x34(%esp,1),%edi
12: c7 04 24 00 00 00 00 movl $0x0,(%esp,1)
19: c7 44 24 04 00 00 00 movl $0x0,0x4(%esp,1)
20: 00
21: c7 44 24 08 00 00 00 movl $0x0,0x8(%esp,1)
28: 00
29: c7 44 24 0c 00 00 00 movl $0x0,0xc(%esp,1)
30: 00
31: 89 74 24 04 mov %esi,0x4(%esp,1)
35: 89 74 24 14 mov %esi,0x14(%esp,1)
39: c7 44 24 10 00 00 00 movl $0x0,0x10(%esp,1)
40: 00
41: c7 44 24 18 00 00 00 movl $0x0,0x18(%esp,1)
48: 00
49: c7 44 24 1c 00 00 00 movl $0x0,0x1c(%esp,1)
50: 00
51: 8d 6c 24 10 lea 0x10(%esp,1),%ebp
55: c7 06 01 00 00 00 movl $0x1,(%esi)
5b: 8b 87 e8 00 00 00 mov 0xe8(%edi),%eax
61: 89 ea mov %ebp,%edx
63: 8d 5f 6c lea 0x6c(%edi),%ebx
66: e8 fc ff ff ff call 67 <pipe_wait+0x67>
6b: 89 d9 mov %ebx,%ecx
6d: ff 47 6c incl 0x6c(%edi)
70: 0f 8e e3 0b 00 00 jle c59 <.text.lock.pipe>
76: e8 fc ff ff ff call 77 <pipe_wait+0x77>
7b: 89 ea mov %ebp,%edx
7d: 8b 87 e8 00 00 00 mov 0xe8(%edi),%eax
83: e8 fc ff ff ff call 84 <pipe_wait+0x84>
88: 89 d9 mov %ebx,%ecx
8a: c7 06 00 00 00 00 movl $0x0,(%esi)
90: ff 4f 6c decl 0x6c(%edi)
93: 0f 88 ca 0b 00 00 js c63 <.text.lock.pipe+0xa>
99: 83 c4 20 add $0x20,%esp
9c: 5b pop %ebx
9d: 5e pop %esi
9e: 5f pop %edi
9f: 5d pop %ebp
a0: c3 ret
a1: eb 0d jmp b0 <pipe_read>
a3: 90 nop
a4: 90 nop
a5: 90 nop
a6: 90 nop
a7: 90 nop
a8: 90 nop
a9: 90 nop
aa: 90 nop
ab: 90 nop
ac: 90 nop
ad: 90 nop
ae: 90 nop
af: 90 nop
000000b0 <pipe_read>:
b0: 55 push %ebp
b1: 57 push %edi
b2: 56 push %esi
b3: be e3 ff ff ff mov $0xffffffe3,%esi
b8: 53 push %ebx
b9: 83 ec 0c sub $0xc,%esp
bc: 8b 54 24 20 mov 0x20(%esp,1),%edx
c0: 8b 6c 24 28 mov 0x28(%esp,1),%ebp
c4: 8b 42 08 mov 0x8(%edx),%eax
c7: 8b 58 08 mov 0x8(%eax),%ebx
ca: 89 d0 mov %edx,%eax
cc: 83 c0 20 add $0x20,%eax
cf: c7 44 24 08 00 00 00 movl $0x0,0x8(%esp,1)
d6: 00
d7: 39 44 24 2c cmp %eax,0x2c(%esp,1)
db: 74 23 je 100 <pipe_read+0x50>
dd: 8b 44 24 08 mov 0x8(%esp,1),%eax
e1: 85 c0 test %eax,%eax
e3: 74 04 je e9 <pipe_read+0x39>
e5: 8b 74 24 08 mov 0x8(%esp,1),%esi
e9: 53 push %ebx
ea: e8 fc ff ff ff call eb <pipe_read+0x3b>
ef: 83 c4 10 add $0x10,%esp
f2: 5b pop %ebx
f3: 89 f0 mov %esi,%eax
f5: 5e pop %esi
f6: 5f pop %edi
f7: 5d pop %ebp
f8: c3 ret
f9: 8d b4 26 00 00 00 00 lea 0x0(%esi,1),%esi
100: 31 f6 xor %esi,%esi
102: 85 ed test %ebp,%ebp
104: 74 d7 je dd <pipe_read+0x2d>
106: 8d 4b 6c lea 0x6c(%ebx),%ecx
109: be 00 fe ff ff mov $0xfffffe00,%esi
10e: 89 4c 24 04 mov %ecx,0x4(%esp,1)
112: ff 4b 6c decl 0x6c(%ebx)
115: 0f 88 52 0b 00 00 js c6d <.text.lock.pipe+0x14>
11b: 31 c0 xor %eax,%eax
11d: 85 c0 test %eax,%eax
11f: 75 bc jne dd <pipe_read+0x2d>
121: 8b bb e8 00 00 00 mov 0xe8(%ebx),%edi
127: 8b 47 0c mov 0xc(%edi),%eax
12a: 85 c0 test %eax,%eax
12c: 75 74 jne 1a2 <pipe_read+0xf2>
12e: 8b 47 18 mov 0x18(%edi),%eax
131: 31 f6 xor %esi,%esi
133: 85 c0 test %eax,%eax
135: 74 59 je 190 <pipe_read+0xe0>
137: 8b 44 24 20 mov 0x20(%esp,1),%eax
13b: be f5 ff ff ff mov $0xfffffff5,%esi
140: f6 40 19 08 testb $0x8,0x19(%eax)
144: 75 4a jne 190 <pipe_read+0xe0>
146: ba 00 e0 ff ff mov $0xffffe000,%edx
14b: 21 e2 and %esp,%edx
14d: 89 14 24 mov %edx,(%esp,1)
150: 8b 4f 1c mov 0x1c(%edi),%ecx
153: be 00 fe ff ff mov $0xfffffe00,%esi
158: 41 inc %ecx
159: 89 4f 1c mov %ecx,0x1c(%edi)
15c: 53 push %ebx
15d: e8 fc ff ff ff call 15e <pipe_read+0xae>
162: 8b 83 e8 00 00 00 mov 0xe8(%ebx),%eax
168: 8b 50 1c mov 0x1c(%eax),%edx
16b: 4a dec %edx
16c: 89 50 1c mov %edx,0x1c(%eax)
16f: 58 pop %eax
170: 8b 0c 24 mov (%esp,1),%ecx
173: 8b 41 08 mov 0x8(%ecx),%eax
176: 85 c0 test %eax,%eax
178: 75 16 jne 190 <pipe_read+0xe0>
17a: 8b bb e8 00 00 00 mov 0xe8(%ebx),%edi
180: 31 f6 xor %esi,%esi
182: 8b 47 0c mov 0xc(%edi),%eax
185: 85 c0 test %eax,%eax
187: 75 19 jne 1a2 <pipe_read+0xf2>
189: 8b 47 18 mov 0x18(%edi),%eax
18c: 85 c0 test %eax,%eax
18e: 75 c0 jne 150 <pipe_read+0xa0>
190: 8b 4c 24 04 mov 0x4(%esp,1),%ecx
194: ff 43 6c incl 0x6c(%ebx)
197: 0f 8e da 0a 00 00 jle c77 <.text.lock.pipe+0x1e>
19d: e9 3b ff ff ff jmp dd <pipe_read+0x2d>
1a2: be f2 ff ff ff mov $0xfffffff2,%esi
1a7: 85 ed test %ebp,%ebp
1a9: 0f 84 94 00 00 00 je 243 <pipe_read+0x193>
1af: 8b 57 0c mov 0xc(%edi),%edx
1b2: 85 d2 test %edx,%edx
1b4: 0f 84 89 00 00 00 je 243 <pipe_read+0x193>
1ba: 8b 47 10 mov 0x10(%edi),%eax
1bd: 8b 4f 08 mov 0x8(%edi),%ecx
1c0: bf 00 10 00 00 mov $0x1000,%edi
1c5: 01 c1 add %eax,%ecx
1c7: 29 c7 sub %eax,%edi
1c9: 39 ef cmp %ebp,%edi
1cb: 76 02 jbe 1cf <pipe_read+0x11f>
1cd: 89 ef mov %ebp,%edi
1cf: 39 d7 cmp %edx,%edi
1d1: 7e 02 jle 1d5 <pipe_read+0x125>
1d3: 89 d7 mov %edx,%edi
1d5: 57 push %edi
1d6: 51 push %ecx
1d7: 8b 44 24 2c mov 0x2c(%esp,1),%eax
1db: 50 push %eax
1dc: e8 fc ff ff ff call 1dd <pipe_read+0x12d>
1e1: 83 c4 0c add $0xc,%esp
1e4: 85 c0 test %eax,%eax
1e6: 75 a8 jne 190 <pipe_read+0xe0>
1e8: 8b 4c 24 08 mov 0x8(%esp,1),%ecx
1ec: 01 f9 add %edi,%ecx
1ee: 89 4c 24 08 mov %ecx,0x8(%esp,1)
1f2: 8b 83 e8 00 00 00 mov 0xe8(%ebx),%eax
1f8: 8b 50 10 mov 0x10(%eax),%edx
1fb: 01 fa add %edi,%edx
1fd: 89 50 10 mov %edx,0x10(%eax)
200: 8b 83 e8 00 00 00 mov 0xe8(%ebx),%eax
206: 8b 48 10 mov 0x10(%eax),%ecx
209: 81 e1 ff 0f 00 00 and $0xfff,%ecx
20f: 89 48 10 mov %ecx,0x10(%eax)
212: 8b 83 e8 00 00 00 mov 0xe8(%ebx),%eax
218: 8b 50 0c mov 0xc(%eax),%edx
21b: 29 fa sub %edi,%edx
21d: 89 50 0c mov %edx,0xc(%eax)
220: 8b 44 24 24 mov 0x24(%esp,1),%eax
224: 01 f8 add %edi,%eax
226: 29 fd sub %edi,%ebp
228: 89 44 24 24 mov %eax,0x24(%esp,1)
22c: 0f 84 83 00 00 00 je 2b5 <pipe_read+0x205>
232: 8b bb e8 00 00 00 mov 0xe8(%ebx),%edi
238: 8b 57 0c mov 0xc(%edi),%edx
23b: 85 d2 test %edx,%edx
23d: 0f 85 77 ff ff ff jne 1ba <pipe_read+0x10a>
243: 8b 77 0c mov 0xc(%edi),%esi
246: 85 f6 test %esi,%esi
248: 75 0d jne 257 <pipe_read+0x1a7>
24a: c7 47 10 00 00 00 00 movl $0x0,0x10(%edi)
251: 8b bb e8 00 00 00 mov 0xe8(%ebx),%edi
257: 85 ed test %ebp,%ebp
259: 74 11 je 26c <pipe_read+0x1bc>
25b: 8b 4f 20 mov 0x20(%edi),%ecx
25e: 85 c9 test %ecx,%ecx
260: 74 0a je 26c <pipe_read+0x1bc>
262: 8b 44 24 20 mov 0x20(%esp,1),%eax
266: f6 40 19 08 testb $0x8,0x19(%eax)
26a: 74 1a je 286 <pipe_read+0x1d6>
26c: b9 01 00 00 00 mov $0x1,%ecx
271: ba 01 00 00 00 mov $0x1,%edx
276: 89 f8 mov %edi,%eax
278: e8 fc ff ff ff call 279 <pipe_read+0x1c9>
27d: 8b 74 24 08 mov 0x8(%esp,1),%esi
281: e9 0a ff ff ff jmp 190 <pipe_read+0xe0>
286: ba 01 00 00 00 mov $0x1,%edx
28b: 89 f8 mov %edi,%eax
28d: b9 01 00 00 00 mov $0x1,%ecx
292: e8 fc ff ff ff call 293 <pipe_read+0x1e3>
297: 8b bb e8 00 00 00 mov 0xe8(%ebx),%edi
29d: 8b 57 0c mov 0xc(%edi),%edx
2a0: 85 d2 test %edx,%edx
2a2: 0f 84 86 fe ff ff je 12e <pipe_read+0x7e>
2a8: 0f 0b ud2a
2aa: 78 00 js 2ac <pipe_read+0x1fc>
2ac: 00 00 add %al,(%eax)
2ae: 00 00 add %al,(%eax)
2b0: e9 79 fe ff ff jmp 12e <pipe_read+0x7e>
2b5: 8b bb e8 00 00 00 mov 0xe8(%ebx),%edi
2bb: eb 86 jmp 243 <pipe_read+0x193>
2bd: 8d 76 00 lea 0x0(%esi),%esi
000002c0 <pipe_write>:
2c0: 55 push %ebp
2c1: 57 push %edi
2c2: bf e3 ff ff ff mov $0xffffffe3,%edi
2c7: 56 push %esi
2c8: 53 push %ebx
2c9: 83 ec 1c sub $0x1c,%esp
2cc: 8b 54 24 30 mov 0x30(%esp,1),%edx
2d0: 8b 6c 24 38 mov 0x38(%esp,1),%ebp
2d4: 8b 42 08 mov 0x8(%edx),%eax
2d7: 8b 58 08 mov 0x8(%eax),%ebx
2da: 89 d0 mov %edx,%eax
2dc: 83 c0 20 add $0x20,%eax
2df: c7 44 24 14 00 00 00 movl $0x0,0x14(%esp,1)
2e6: 00
2e7: 39 44 24 3c cmp %eax,0x3c(%esp,1)
2eb: 74 16 je 303 <pipe_write+0x43>
2ed: 8b 44 24 14 mov 0x14(%esp,1),%eax
2f1: 85 c0 test %eax,%eax
2f3: 74 04 je 2f9 <pipe_write+0x39>
2f5: 8b 7c 24 14 mov 0x14(%esp,1),%edi
2f9: 89 f8 mov %edi,%eax
2fb: 83 c4 1c add $0x1c,%esp
2fe: 5b pop %ebx
2ff: 5e pop %esi
300: 5f pop %edi
301: 5d pop %ebp
302: c3 ret
303: 31 ff xor %edi,%edi
305: 85 ed test %ebp,%ebp
307: 74 e4 je 2ed <pipe_write+0x2d>
309: 8d 4b 6c lea 0x6c(%ebx),%ecx
30c: bf 00 fe ff ff mov $0xfffffe00,%edi
311: 89 4c 24 10 mov %ecx,0x10(%esp,1)
315: ff 4b 6c decl 0x6c(%ebx)
318: 0f 88 63 09 00 00 js c81 <.text.lock.pipe+0x28>
31e: 31 c0 xor %eax,%eax
320: 85 c0 test %eax,%eax
322: 75 c9 jne 2ed <pipe_write+0x2d>
324: 8b b3 e8 00 00 00 mov 0xe8(%ebx),%esi
32a: 89 f2 mov %esi,%edx
32c: 8b 46 14 mov 0x14(%esi),%eax
32f: 85 c0 test %eax,%eax
331: 0f 84 8d 01 00 00 je 4c4 <pipe_write+0x204>
337: 89 6c 24 18 mov %ebp,0x18(%esp,1)
33b: 81 fd 00 10 00 00 cmp $0x1000,%ebp
341: 76 08 jbe 34b <pipe_write+0x8b>
343: c7 44 24 18 01 00 00 movl $0x1,0x18(%esp,1)
34a: 00
34b: 8b 44 24 30 mov 0x30(%esp,1),%eax
34f: f6 40 19 08 testb $0x8,0x19(%eax)
353: 0f 84 a2 01 00 00 je 4fb <pipe_write+0x23b>
359: b8 00 10 00 00 mov $0x1000,%eax
35e: 8b 4a 0c mov 0xc(%edx),%ecx
361: 29 c8 sub %ecx,%eax
363: bf f5 ff ff ff mov $0xfffffff5,%edi
368: 3b 44 24 18 cmp 0x18(%esp,1),%eax
36c: 73 12 jae 380 <pipe_write+0xc0>
36e: 8b 4c 24 10 mov 0x10(%esp,1),%ecx
372: ff 43 6c incl 0x6c(%ebx)
375: 0f 8e 10 09 00 00 jle c8b <.text.lock.pipe+0x32>
37b: e9 6d ff ff ff jmp 2ed <pipe_write+0x2d>
380: bf f2 ff ff ff mov $0xfffffff2,%edi
385: 85 ed test %ebp,%ebp
387: 0f 84 94 00 00 00 je 421 <pipe_write+0x161>
38d: 8b 4e 0c mov 0xc(%esi),%ecx
390: 8b 56 10 mov 0x10(%esi),%edx
393: 01 ca add %ecx,%edx
395: 8b 46 08 mov 0x8(%esi),%eax
398: 81 e2 ff 0f 00 00 and $0xfff,%edx
39e: 01 d0 add %edx,%eax
3a0: 89 44 24 08 mov %eax,0x8(%esp,1)
3a4: b8 00 10 00 00 mov $0x1000,%eax
3a9: 29 d0 sub %edx,%eax
3ab: 89 44 24 04 mov %eax,0x4(%esp,1)
3af: b8 00 10 00 00 mov $0x1000,%eax
3b4: 29 c8 sub %ecx,%eax
3b6: 0f 84 90 00 00 00 je 44c <pipe_write+0x18c>
3bc: 39 6c 24 04 cmp %ebp,0x4(%esp,1)
3c0: 76 04 jbe 3c6 <pipe_write+0x106>
3c2: 89 6c 24 04 mov %ebp,0x4(%esp,1)
3c6: 39 44 24 04 cmp %eax,0x4(%esp,1)
3ca: 7e 04 jle 3d0 <pipe_write+0x110>
3cc: 89 44 24 04 mov %eax,0x4(%esp,1)
3d0: 8b 44 24 04 mov 0x4(%esp,1),%eax
3d4: 50 push %eax
3d5: 8b 44 24 38 mov 0x38(%esp,1),%eax
3d9: 50 push %eax
3da: 8b 44 24 10 mov 0x10(%esp,1),%eax
3de: 50 push %eax
3df: e8 fc ff ff ff call 3e0 <pipe_write+0x120>
3e4: 83 c4 0c add $0xc,%esp
3e7: 85 c0 test %eax,%eax
3e9: 75 83 jne 36e <pipe_write+0xae>
3eb: 8b 54 24 04 mov 0x4(%esp,1),%edx
3ef: 8b 74 24 14 mov 0x14(%esp,1),%esi
3f3: 01 d6 add %edx,%esi
3f5: 29 d5 sub %edx,%ebp
3f7: 89 74 24 14 mov %esi,0x14(%esp,1)
3fb: 8b 83 e8 00 00 00 mov 0xe8(%ebx),%eax
401: 8b 48 0c mov 0xc(%eax),%ecx
404: 01 d1 add %edx,%ecx
406: 89 48 0c mov %ecx,0xc(%eax)
409: 8b 74 24 34 mov 0x34(%esp,1),%esi
40d: 01 d6 add %edx,%esi
40f: 89 74 24 34 mov %esi,0x34(%esp,1)
413: 8b b3 e8 00 00 00 mov 0xe8(%ebx),%esi
419: 85 ed test %ebp,%ebp
41b: 0f 85 6c ff ff ff jne 38d <pipe_write+0xcd>
421: ba 01 00 00 00 mov $0x1,%edx
426: b9 01 00 00 00 mov $0x1,%ecx
42b: 89 f0 mov %esi,%eax
42d: e8 fc ff ff ff call 42e <pipe_write+0x16e>
432: a1 00 00 00 00 mov 0x0,%eax
437: 89 43 50 mov %eax,0x50(%ebx)
43a: 89 43 54 mov %eax,0x54(%ebx)
43d: 6a 07 push $0x7
43f: 53 push %ebx
440: e8 fc ff ff ff call 441 <pipe_write+0x181>
445: 58 pop %eax
446: 5a pop %edx
447: e9 22 ff ff ff jmp 36e <pipe_write+0xae>
44c: 8b 4c 24 30 mov 0x30(%esp,1),%ecx
450: 8b 7c 24 14 mov 0x14(%esp,1),%edi
454: f6 41 19 08 testb $0x8,0x19(%ecx)
458: 75 c7 jne 421 <pipe_write+0x161>
45a: b8 00 e0 ff ff mov $0xffffe000,%eax
45f: 21 e0 and %esp,%eax
461: 89 04 24 mov %eax,(%esp,1)
464: ba 01 00 00 00 mov $0x1,%edx
469: 89 f0 mov %esi,%eax
46b: b9 01 00 00 00 mov $0x1,%ecx
470: e8 fc ff ff ff call 471 <pipe_write+0x1b1>
475: 8b 83 e8 00 00 00 mov 0xe8(%ebx),%eax
47b: 8b 48 20 mov 0x20(%eax),%ecx
47e: 41 inc %ecx
47f: 89 48 20 mov %ecx,0x20(%eax)
482: 53 push %ebx
483: e8 fc ff ff ff call 484 <pipe_write+0x1c4>
488: 8b 83 e8 00 00 00 mov 0xe8(%ebx),%eax
48e: 8b 50 20 mov 0x20(%eax),%edx
491: 4a dec %edx
492: 89 50 20 mov %edx,0x20(%eax)
495: 58 pop %eax
496: 8b 14 24 mov (%esp,1),%edx
499: 8b 72 08 mov 0x8(%edx),%esi
49c: 85 f6 test %esi,%esi
49e: 0f 85 ca fe ff ff jne 36e <pipe_write+0xae>
4a4: 8b b3 e8 00 00 00 mov 0xe8(%ebx),%esi
4aa: 8b 4e 14 mov 0x14(%esi),%ecx
4ad: 85 c9 test %ecx,%ecx
4af: 74 13 je 4c4 <pipe_write+0x204>
4b1: 81 7e 0c 00 10 00 00 cmpl $0x1000,0xc(%esi)
4b8: 74 aa je 464 <pipe_write+0x1a4>
4ba: bf f2 ff ff ff mov $0xfffffff2,%edi
4bf: e9 55 ff ff ff jmp 419 <pipe_write+0x159>
4c4: 8b 44 24 14 mov 0x14(%esp,1),%eax
4c8: 85 c0 test %eax,%eax
4ca: 0f 85 9e fe ff ff jne 36e <pipe_write+0xae>
4d0: 8b 4c 24 10 mov 0x10(%esp,1),%ecx
4d4: ff 43 6c incl 0x6c(%ebx)
4d7: 0f 8e b8 07 00 00 jle c95 <.text.lock.pipe+0x3c>
4dd: 6a 00 push $0x0
4df: b8 00 e0 ff ff mov $0xffffe000,%eax
4e4: 21 e0 and %esp,%eax
4e6: 50 push %eax
4e7: 6a 0d push $0xd
4e9: e8 fc ff ff ff call 4ea <pipe_write+0x22a>
4ee: 83 c4 0c add $0xc,%esp
4f1: b8 e0 ff ff ff mov $0xffffffe0,%eax
4f6: e9 00 fe ff ff jmp 2fb <pipe_write+0x3b>
4fb: b8 00 10 00 00 mov $0x1000,%eax
500: 8b 7a 0c mov 0xc(%edx),%edi
503: 29 f8 sub %edi,%eax
505: 3b 44 24 18 cmp 0x18(%esp,1),%eax
509: 0f 83 71 fe ff ff jae 380 <pipe_write+0xc0>
50f: b9 00 e0 ff ff mov $0xffffe000,%ecx
514: bf 00 fe ff ff mov $0xfffffe00,%edi
519: 21 e1 and %esp,%ecx
51b: 89 4c 24 0c mov %ecx,0xc(%esp,1)
51f: 8b 4a 20 mov 0x20(%edx),%ecx
522: 41 inc %ecx
523: 89 4a 20 mov %ecx,0x20(%edx)
526: 53 push %ebx
527: e8 fc ff ff ff call 528 <pipe_write+0x268>
52c: 8b 83 e8 00 00 00 mov 0xe8(%ebx),%eax
532: 8b 50 20 mov 0x20(%eax),%edx
535: 4a dec %edx
536: 89 50 20 mov %edx,0x20(%eax)
539: 58 pop %eax
53a: 8b 44 24 0c mov 0xc(%esp,1),%eax
53e: 8b 40 08 mov 0x8(%eax),%eax
541: 85 c0 test %eax,%eax
543: 0f 85 25 fe ff ff jne 36e <pipe_write+0xae>
549: 8b b3 e8 00 00 00 mov 0xe8(%ebx),%esi
54f: 8b 46 14 mov 0x14(%esi),%eax
552: 85 c0 test %eax,%eax
554: 0f 84 6a ff ff ff je 4c4 <pipe_write+0x204>
55a: b8 00 10 00 00 mov $0x1000,%eax
55f: 8b 4e 0c mov 0xc(%esi),%ecx
562: 29 c8 sub %ecx,%eax
564: 89 f2 mov %esi,%edx
566: 3b 44 24 18 cmp 0x18(%esp,1),%eax
56a: 72 b3 jb 51f <pipe_write+0x25f>
56c: e9 0f fe ff ff jmp 380 <pipe_write+0xc0>
571: eb 0d jmp 580 <bad_pipe_r>
573: 90 nop
574: 90 nop
575: 90 nop
576: 90 nop
577: 90 nop
578: 90 nop
579: 90 nop
57a: 90 nop
57b: 90 nop
57c: 90 nop
57d: 90 nop
57e: 90 nop
57f: 90 nop
00000580 <bad_pipe_r>:
580: b8 f7 ff ff ff mov $0xfffffff7,%eax
585: c3 ret
586: 8d 76 00 lea 0x0(%esi),%esi
589: 8d bc 27 00 00 00 00 lea 0x0(%edi,1),%edi
00000590 <bad_pipe_w>:
590: b8 f7 ff ff ff mov $0xfffffff7,%eax
595: c3 ret
596: 8d 76 00 lea 0x0(%esi),%esi
599: 8d bc 27 00 00 00 00 lea 0x0(%edi,1),%edi
... more code ...
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