From: qinwei<qinwei@sunnorth.com.cn>
To: gdb@sourceware.org
Subject: Re: How to avoid "but contains no code." in command "info line"?
Date: Wed, 28 Mar 2007 02:46:00 -0000 [thread overview]
Message-ID: <OFE445BFC3.D4ED4379-ON482572AC.000DD950-482572AC.000F2CCB@sunnorth.com.cn> (raw)
In-Reply-To: <20070327111627.GA15136@caradoc.them.org>
[-- Attachment #1: Type: text/plain, Size: 1040 bytes --]
> You're using stabs. Don't! DWARF-2 works much better, especially for
> strange ranges and multiple sections. If it still happens with
> DWARF-2 I can look into it, but I'm not interested in trying to fix
> this for stabs.
Hi, using DWARF-2 also has the problem. I use gcc-3.4 and gcc-4.0
gcc -o t -gdwarf-2 s2.s tp_bt1.c
objdump -dhs t &>log1
readelf --debug-dump t &>log2
1934 ALL_SYMTABS (objfile, s)
(gdb)
1936 bv = BLOCKVECTOR (s);
(gdb)
1937 b = BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK);
(gdb)
1939 if (BLOCK_START (b) <= pc
(gdb) p *b
$1 = {
startaddr = 0,
endaddr = 0,
function = 0x0,
superblock = 0x0,
dict = 0xa3317b4,
language_specific = {
cplus_specific = {
namespace = 0x0
}
},
gcc_compile_flag = 2 '\002'
}
(gdb)
The section .debug_aranges contains:
Length: 36
Version: 2
Offset into .debug_info: 0
Pointer Size: 4
Segment Size: 0
Address Length
08048334 10
080484b4 10
[-- Attachment #2: tp_bt1.c --]
[-- Type: application/octet-stream, Size: 305 bytes --]
int
fun2 (int x, int y)
{
int z;
z = x * y;
return z;
}
int
fun1 (int k, int l)
{
int m, n;
int ret;
m = k - l;
n = k + l;
ret = fun2 (m, n);
return ret;
}
int
main (void)
{
int i = 200;
int j = 100;
int ret;
i = 300;
j = 400;
ret = fun1 (i, j);
return ret;
}
[-- Attachment #3: log1 --]
[-- Type: application/octet-stream, Size: 27333 bytes --]
t: file format elf32-i386
Sections:
Idx Name Size VMA LMA File off Algn
0 .interp 00000013 08048114 08048114 00000114 2**0
CONTENTS, ALLOC, LOAD, READONLY, DATA
1 .note.ABI-tag 00000020 08048128 08048128 00000128 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
2 .hash 00000028 08048148 08048148 00000148 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
3 .dynsym 00000050 08048170 08048170 00000170 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
4 .dynstr 00000059 080481c0 080481c0 000001c0 2**0
CONTENTS, ALLOC, LOAD, READONLY, DATA
5 .gnu.version 0000000a 0804821a 0804821a 0000021a 2**1
CONTENTS, ALLOC, LOAD, READONLY, DATA
6 .gnu.version_r 00000020 08048224 08048224 00000224 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
7 .rel.dyn 00000008 08048244 08048244 00000244 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
8 .rel.plt 00000008 0804824c 0804824c 0000024c 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
9 .init 00000017 08048254 08048254 00000254 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
10 .plt 00000020 0804826c 0804826c 0000026c 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
11 .text 00000224 08048290 08048290 00000290 2**4
CONTENTS, ALLOC, LOAD, READONLY, CODE
12 .my_section 0000000a 080484b4 080484b4 000004b4 2**0
CONTENTS, ALLOC, LOAD, READONLY, CODE
13 .fini 0000001a 080484c0 080484c0 000004c0 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
14 .rodata 00000008 080484dc 080484dc 000004dc 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
15 .eh_frame 00000004 080484e4 080484e4 000004e4 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
16 .ctors 00000008 080494e8 080494e8 000004e8 2**2
CONTENTS, ALLOC, LOAD, DATA
17 .dtors 00000008 080494f0 080494f0 000004f0 2**2
CONTENTS, ALLOC, LOAD, DATA
18 .jcr 00000004 080494f8 080494f8 000004f8 2**2
CONTENTS, ALLOC, LOAD, DATA
19 .dynamic 000000c8 080494fc 080494fc 000004fc 2**2
CONTENTS, ALLOC, LOAD, DATA
20 .got 00000004 080495c4 080495c4 000005c4 2**2
CONTENTS, ALLOC, LOAD, DATA
21 .got.plt 00000010 080495c8 080495c8 000005c8 2**2
CONTENTS, ALLOC, LOAD, DATA
22 .data 0000000c 080495d8 080495d8 000005d8 2**2
CONTENTS, ALLOC, LOAD, DATA
23 .bss 00000004 080495e4 080495e4 000005e4 2**2
ALLOC
24 .comment 000000bd 00000000 00000000 000005e4 2**0
CONTENTS, READONLY
25 .debug_aranges 00000048 00000000 00000000 000006a8 2**3
CONTENTS, READONLY, DEBUGGING
26 .debug_pubnames 0000002d 00000000 00000000 000006f0 2**0
CONTENTS, READONLY, DEBUGGING
27 .debug_info 00000197 00000000 00000000 0000071d 2**0
CONTENTS, READONLY, DEBUGGING
28 .debug_abbrev 0000007d 00000000 00000000 000008b4 2**0
CONTENTS, READONLY, DEBUGGING
29 .debug_line 00000085 00000000 00000000 00000931 2**0
CONTENTS, READONLY, DEBUGGING
30 .debug_frame 0000005c 00000000 00000000 000009b8 2**2
CONTENTS, READONLY, DEBUGGING
Contents of section .interp:
8048114 2f6c6962 2f6c642d 6c696e75 782e736f /lib/ld-linux.so
8048124 2e3200 .2.
Contents of section .note.ABI-tag:
8048128 04000000 10000000 01000000 474e5500 ............GNU.
8048138 00000000 02000000 02000000 05000000 ................
Contents of section .hash:
8048148 03000000 05000000 04000000 01000000 ................
8048158 02000000 00000000 00000000 00000000 ................
8048168 00000000 03000000 ........
Contents of section .dynsym:
8048170 00000000 00000000 00000000 00000000 ................
8048180 3d000000 00000000 dd000000 12000000 =...............
8048190 2e000000 e0840408 04000000 11000f00 ................
80481a0 01000000 00000000 00000000 20000000 ............ ...
80481b0 15000000 00000000 00000000 20000000 ............ ...
Contents of section .dynstr:
80481c0 005f4a76 5f526567 69737465 72436c61 ._Jv_RegisterCla
80481d0 73736573 005f5f67 6d6f6e5f 73746172 sses.__gmon_star
80481e0 745f5f00 6c696263 2e736f2e 36005f49 t__.libc.so.6._I
80481f0 4f5f7374 64696e5f 75736564 005f5f6c O_stdin_used.__l
8048200 6962635f 73746172 745f6d61 696e0047 ibc_start_main.G
8048210 4c494243 5f322e30 00 LIBC_2.0.
Contents of section .gnu.version:
804821a 00000200 01000000 0000 ..........
Contents of section .gnu.version_r:
8048224 01000100 24000000 10000000 00000000 ....$...........
8048234 1069690d 00000200 4f000000 00000000 .ii.....O.......
Contents of section .rel.dyn:
8048244 c4950408 06040000 ........
Contents of section .rel.plt:
804824c d4950408 07010000 ........
Contents of section .init:
8048254 5589e583 ec08e855 000000e8 ac000000 U......U........
8048264 e8170200 00c9c3 .......
Contents of section .plt:
804826c ff35cc95 0408ff25 d0950408 00000000 .5.....%........
804827c ff25d495 04086800 000000e9 e0ffffff .%....h.........
Contents of section .text:
8048290 31ed5e89 e183e4f0 50545268 30840408 1.^.....PTRh0...
80482a0 68dc8304 08515668 89830408 e8cbffff h....QVh........
80482b0 fff49090 5589e553 e8000000 005b81c3 ....U..S.....[..
80482c0 0b130000 528b83fc ffffff85 c07402ff ....R........t..
80482d0 d0585bc9 c3909090 90909090 90909090 .X[.............
80482e0 5589e583 ec08803d e4950408 00740ceb U......=.....t..
80482f0 1c83c004 a3e09504 08ffd2a1 e0950408 ................
8048300 8b1085d2 75ebc605 e4950408 01c9c390 ....u...........
8048310 5589e583 ec08a1f8 94040885 c07412b8 U............t..
8048320 00000000 85c07409 c70424f8 940408ff ......t...$.....
8048330 d0c9c390 e81c0000 00e81700 00009090 ................
8048340 5589e583 ec108b45 080faf45 0c8945fc U......E...E..E.
8048350 8b45fcc9 c35589e5 83ec188b 550c8b45 .E...U......U..E
8048360 0829d089 45f48b45 0c034508 8945f88b .)..E..E..E..E..
8048370 45f88944 24048b45 f4890424 e8bfffff E..D$..E...$....
8048380 ff8945fc 8b45fcc9 c35589e5 83ec1883 ..E..E...U......
8048390 e4f0b800 00000083 c00f83c0 0fc1e804 ................
80483a0 c1e00429 c4c745f4 c8000000 c745f864 ...)..E......E.d
80483b0 000000c7 45f42c01 0000c745 f8900100 ....E.,....E....
80483c0 008b45f8 89442404 8b45f489 0424e882 ..E..D$..E...$..
80483d0 ffffff89 45fc8b45 fcc9c390 5589e557 ....E..E....U..W
80483e0 565383ec 0ce80000 00005b81 c3de1100 VS........[.....
80483f0 00e85efe ffff8d83 20ffffff 8d9320ff ..^..... ..... .
8048400 ffff8945 f029d031 f6c1f802 39c67316 ...E.).1....9.s.
8048410 89d789f6 ff14b28b 4df029f9 46c1f902 ........M.).F...
8048420 39ce89fa 72ee83c4 0c5b5e5f c9c389f6 9...r....[^_....
8048430 5589e557 5653e800 0000005b 81c38d11 U..WVS.....[....
8048440 00008d83 20ffffff 8dbb20ff ffff29f8 .... ..... ...).
8048450 c1f80283 ec0c8d70 ffeb0590 ff14b74e .......p.......N
8048460 83feff75 f7e85600 000083c4 0c5b5e5f ...u..V......[^_
8048470 c9c39090 90909090 90909090 90909090 ................
8048480 5589e553 83ec04a1 e8940408 83f8ff74 U..S...........t
8048490 1cbbe894 04088d76 008dbc27 00000000 .......v...'....
80484a0 ffd08b43 fc83eb04 83f8ff75 f3585b5d ...C.......u.X[]
80484b0 c3909090 ....
Contents of section .my_section:
80484b4 e887feff ffe882fe ffff ..........
Contents of section .fini:
80484c0 5589e553 e8000000 005b81c3 ff100000 U..S.....[......
80484d0 50e80afe ffff595b c9c3 P.....Y[..
Contents of section .rodata:
80484dc 03000000 01000200 ........
Contents of section .eh_frame:
80484e4 00000000 ....
Contents of section .ctors:
80494e8 ffffffff 00000000 ........
Contents of section .dtors:
80494f0 ffffffff 00000000 ........
Contents of section .jcr:
80494f8 00000000 ....
Contents of section .dynamic:
80494fc 01000000 24000000 0c000000 54820408 ....$.......T...
804950c 0d000000 c0840408 04000000 48810408 ............H...
804951c 05000000 c0810408 06000000 70810408 ............p...
804952c 0a000000 59000000 0b000000 10000000 ....Y...........
804953c 15000000 00000000 03000000 c8950408 ................
804954c 02000000 08000000 14000000 11000000 ................
804955c 17000000 4c820408 11000000 44820408 ....L.......D...
804956c 12000000 08000000 13000000 08000000 ................
804957c feffff6f 24820408 ffffff6f 01000000 ...o$......o....
804958c f0ffff6f 1a820408 00000000 00000000 ...o............
804959c 00000000 00000000 00000000 00000000 ................
80495ac 00000000 00000000 00000000 00000000 ................
80495bc 00000000 00000000 ........
Contents of section .got:
80495c4 00000000 ....
Contents of section .got.plt:
80495c8 fc940408 00000000 00000000 82820408 ................
Contents of section .data:
80495d8 00000000 00000000 f4940408 ............
Contents of section .comment:
0000 00474343 3a202847 4e552920 332e342e .GCC: (GNU) 3.4.
0010 36203230 30363034 30342028 52656420 6 20060404 (Red
0020 48617420 332e342e 362d3229 00004743 Hat 3.4.6-2)..GC
0030 433a2028 474e5529 20332e34 2e362032 C: (GNU) 3.4.6 2
0040 30303630 34303420 28526564 20486174 0060404 (Red Hat
0050 20332e34 2e362d32 29000047 43433a20 3.4.6-2)..GCC:
0060 28474e55 2920342e 302e3200 00474343 (GNU) 4.0.2..GCC
0070 3a202847 4e552920 342e302e 32000047 : (GNU) 4.0.2..G
0080 43433a20 28474e55 2920342e 302e3200 CC: (GNU) 4.0.2.
0090 00474343 3a202847 4e552920 332e342e .GCC: (GNU) 3.4.
00a0 36203230 30363034 30342028 52656420 6 20060404 (Red
00b0 48617420 332e342e 362d3229 00 Hat 3.4.6-2).
Contents of section .debug_aranges:
0000 24000000 02000000 00000400 00000000 $...............
0010 34830408 0a000000 b4840408 0a000000 4...............
0020 00000000 00000000 1c000000 02005800 ..............X.
0030 00000400 00000000 40830408 9b000000 ........@.......
0040 00000000 00000000 ........
Contents of section .debug_pubnames:
0000 29000000 02005800 00003f01 00005c00 ).....X...?...\.
0010 00006675 6e3200a4 00000066 756e3100 ..fun2.....fun1.
0020 ff000000 6d61696e 00000000 00 ....main.....
Contents of section .debug_info:
0000 54000000 02000000 00000401 00000000 T...............
0010 73322e73 002f686f 6d652f71 696e7765 s2.s./home/qinwe
0020 692f474a 3238332f 636f6465 2f627569 i/GJ283/code/bui
0030 6c645f6c 696e7578 2f646562 75672d67 ld_linux/debug-g
0040 64620047 4e552041 5320322e 31352e39 db.GNU AS 2.15.9
0050 322e302e 32000180 3b010000 02001000 2.0.2...;.......
0060 00000401 3e000000 db830408 40830408 ....>.......@...
0070 474e5520 4320342e 302e3200 0174705f GNU C 4.0.2..tp_
0080 6274312e 63002f68 6f6d652f 71696e77 bt1.c./home/qinw
0090 65692f47 4a323833 2f636f64 652f6275 ei/GJ283/code/bu
00a0 696c645f 6c696e75 782f6465 6275672d ild_linux/debug-
00b0 67646200 029d0000 00016675 6e320001 gdb.......fun2..
00c0 03019d00 00004083 04085583 04080155 ......@...U....U
00d0 03780001 029d0000 00027508 03790001 .x........u..y..
00e0 029d0000 0002750c 047a0001 049d0000 ......u..z......
00f0 0002757c 0005696e 74000405 02ff0000 ..u|..int.......
0100 00016675 6e310001 0b019d00 00005583 ..fun1........U.
0110 04088983 04080155 036b0001 0a9d0000 .......U.k......
0120 00027508 036c0001 0a9d0000 0002750c ..u..l........u.
0130 046d0001 0c9d0000 00027574 046e0001 .m........ut.n..
0140 0c9d0000 00027578 04726574 00010d9d ......ux.ret....
0150 00000002 757c0006 016d6169 6e000116 ....u|...main...
0160 019d0000 00898304 08db8304 08015504 ..............U.
0170 69000118 9d000000 02757404 6a000119 i........ut.j...
0180 9d000000 02757804 72657400 011a9d00 .....ux.ret.....
0190 00000275 7c0000 ...u|..
Contents of section .debug_abbrev:
0000 01110010 0603081b 08250813 05000000 .........%......
0010 01110110 06120111 01250813 0b03081b .........%......
0020 08000002 2e010113 3f0c0308 3a0b3b0b ........?...:.;.
0030 270c4913 11011201 400a0000 03050003 '.I.....@.......
0040 083a0b3b 0b491302 0a000004 34000308 .:.;.I......4...
0050 3a0b3b0b 4913020a 00000524 0003080b :.;.I......$....
0060 0b3e0b00 00062e01 3f0c0308 3a0b3b0b .>......?...:.;.
0070 270c4913 11011201 400a0000 00 '.I.....@....
Contents of section .debug_line:
0000 3a000000 02001800 00000101 fb0e0a00 :...............
0010 01010101 00000001 0073322e 73000000 .........s2.s...
0020 00000005 02348304 08135602 05000101 .....4....V.....
0030 000502b4 84040810 56020500 01014300 ........V.....C.
0040 00000200 1c000000 0101fb0e 0a000101 ................
0050 01010000 00010074 705f6274 312e6300 .......tp_bt1.c.
0060 00000000 00050240 83040811 659c3a2f .......@....e.:/
0070 66aa8e08 483a2f08 ab727372 7208483a f...H:/..rsrr.H:
0080 02020001 01 .....
Contents of section .debug_frame:
0000 10000000 ffffffff 0100017c 080c0404 ...........|....
0010 88010000 14000000 00000000 40830408 ............@...
0020 15000000 410e0885 02420d05 14000000 ....A....B......
0030 00000000 55830408 34000000 410e0885 ....U...4...A...
0040 02420d05 14000000 00000000 89830408 .B..............
0050 52000000 410e0885 02420d05 R...A....B..
Disassembly of section .init:
08048254 <_init>:
8048254: 55 push %ebp
8048255: 89 e5 mov %esp,%ebp
8048257: 83 ec 08 sub $0x8,%esp
804825a: e8 55 00 00 00 call 80482b4 <call_gmon_start>
804825f: e8 ac 00 00 00 call 8048310 <frame_dummy>
8048264: e8 17 02 00 00 call 8048480 <__do_global_ctors_aux>
8048269: c9 leave
804826a: c3 ret
Disassembly of section .plt:
0804826c <__libc_start_main@plt-0x10>:
804826c: ff 35 cc 95 04 08 pushl 0x80495cc
8048272: ff 25 d0 95 04 08 jmp *0x80495d0
8048278: 00 00 add %al,(%eax)
...
0804827c <__libc_start_main@plt>:
804827c: ff 25 d4 95 04 08 jmp *0x80495d4
8048282: 68 00 00 00 00 push $0x0
8048287: e9 e0 ff ff ff jmp 804826c <_init+0x18>
Disassembly of section .text:
08048290 <_start>:
8048290: 31 ed xor %ebp,%ebp
8048292: 5e pop %esi
8048293: 89 e1 mov %esp,%ecx
8048295: 83 e4 f0 and $0xfffffff0,%esp
8048298: 50 push %eax
8048299: 54 push %esp
804829a: 52 push %edx
804829b: 68 30 84 04 08 push $0x8048430
80482a0: 68 dc 83 04 08 push $0x80483dc
80482a5: 51 push %ecx
80482a6: 56 push %esi
80482a7: 68 89 83 04 08 push $0x8048389
80482ac: e8 cb ff ff ff call 804827c <__libc_start_main@plt>
80482b1: f4 hlt
80482b2: 90 nop
80482b3: 90 nop
080482b4 <call_gmon_start>:
80482b4: 55 push %ebp
80482b5: 89 e5 mov %esp,%ebp
80482b7: 53 push %ebx
80482b8: e8 00 00 00 00 call 80482bd <call_gmon_start+0x9>
80482bd: 5b pop %ebx
80482be: 81 c3 0b 13 00 00 add $0x130b,%ebx
80482c4: 52 push %edx
80482c5: 8b 83 fc ff ff ff mov 0xfffffffc(%ebx),%eax
80482cb: 85 c0 test %eax,%eax
80482cd: 74 02 je 80482d1 <call_gmon_start+0x1d>
80482cf: ff d0 call *%eax
80482d1: 58 pop %eax
80482d2: 5b pop %ebx
80482d3: c9 leave
80482d4: c3 ret
80482d5: 90 nop
80482d6: 90 nop
80482d7: 90 nop
80482d8: 90 nop
80482d9: 90 nop
80482da: 90 nop
80482db: 90 nop
80482dc: 90 nop
80482dd: 90 nop
80482de: 90 nop
80482df: 90 nop
080482e0 <__do_global_dtors_aux>:
80482e0: 55 push %ebp
80482e1: 89 e5 mov %esp,%ebp
80482e3: 83 ec 08 sub $0x8,%esp
80482e6: 80 3d e4 95 04 08 00 cmpb $0x0,0x80495e4
80482ed: 74 0c je 80482fb <__do_global_dtors_aux+0x1b>
80482ef: eb 1c jmp 804830d <__do_global_dtors_aux+0x2d>
80482f1: 83 c0 04 add $0x4,%eax
80482f4: a3 e0 95 04 08 mov %eax,0x80495e0
80482f9: ff d2 call *%edx
80482fb: a1 e0 95 04 08 mov 0x80495e0,%eax
8048300: 8b 10 mov (%eax),%edx
8048302: 85 d2 test %edx,%edx
8048304: 75 eb jne 80482f1 <__do_global_dtors_aux+0x11>
8048306: c6 05 e4 95 04 08 01 movb $0x1,0x80495e4
804830d: c9 leave
804830e: c3 ret
804830f: 90 nop
08048310 <frame_dummy>:
8048310: 55 push %ebp
8048311: 89 e5 mov %esp,%ebp
8048313: 83 ec 08 sub $0x8,%esp
8048316: a1 f8 94 04 08 mov 0x80494f8,%eax
804831b: 85 c0 test %eax,%eax
804831d: 74 12 je 8048331 <frame_dummy+0x21>
804831f: b8 00 00 00 00 mov $0x0,%eax
8048324: 85 c0 test %eax,%eax
8048326: 74 09 je 8048331 <frame_dummy+0x21>
8048328: c7 04 24 f8 94 04 08 movl $0x80494f8,(%esp)
804832f: ff d0 call *%eax
8048331: c9 leave
8048332: c3 ret
8048333: 90 nop
8048334: e8 1c 00 00 00 call 8048355 <fun1>
8048339: e8 17 00 00 00 call 8048355 <fun1>
804833e: 90 nop
804833f: 90 nop
08048340 <fun2>:
8048340: 55 push %ebp
8048341: 89 e5 mov %esp,%ebp
8048343: 83 ec 10 sub $0x10,%esp
8048346: 8b 45 08 mov 0x8(%ebp),%eax
8048349: 0f af 45 0c imul 0xc(%ebp),%eax
804834d: 89 45 fc mov %eax,0xfffffffc(%ebp)
8048350: 8b 45 fc mov 0xfffffffc(%ebp),%eax
8048353: c9 leave
8048354: c3 ret
08048355 <fun1>:
8048355: 55 push %ebp
8048356: 89 e5 mov %esp,%ebp
8048358: 83 ec 18 sub $0x18,%esp
804835b: 8b 55 0c mov 0xc(%ebp),%edx
804835e: 8b 45 08 mov 0x8(%ebp),%eax
8048361: 29 d0 sub %edx,%eax
8048363: 89 45 f4 mov %eax,0xfffffff4(%ebp)
8048366: 8b 45 0c mov 0xc(%ebp),%eax
8048369: 03 45 08 add 0x8(%ebp),%eax
804836c: 89 45 f8 mov %eax,0xfffffff8(%ebp)
804836f: 8b 45 f8 mov 0xfffffff8(%ebp),%eax
8048372: 89 44 24 04 mov %eax,0x4(%esp)
8048376: 8b 45 f4 mov 0xfffffff4(%ebp),%eax
8048379: 89 04 24 mov %eax,(%esp)
804837c: e8 bf ff ff ff call 8048340 <fun2>
8048381: 89 45 fc mov %eax,0xfffffffc(%ebp)
8048384: 8b 45 fc mov 0xfffffffc(%ebp),%eax
8048387: c9 leave
8048388: c3 ret
08048389 <main>:
8048389: 55 push %ebp
804838a: 89 e5 mov %esp,%ebp
804838c: 83 ec 18 sub $0x18,%esp
804838f: 83 e4 f0 and $0xfffffff0,%esp
8048392: b8 00 00 00 00 mov $0x0,%eax
8048397: 83 c0 0f add $0xf,%eax
804839a: 83 c0 0f add $0xf,%eax
804839d: c1 e8 04 shr $0x4,%eax
80483a0: c1 e0 04 shl $0x4,%eax
80483a3: 29 c4 sub %eax,%esp
80483a5: c7 45 f4 c8 00 00 00 movl $0xc8,0xfffffff4(%ebp)
80483ac: c7 45 f8 64 00 00 00 movl $0x64,0xfffffff8(%ebp)
80483b3: c7 45 f4 2c 01 00 00 movl $0x12c,0xfffffff4(%ebp)
80483ba: c7 45 f8 90 01 00 00 movl $0x190,0xfffffff8(%ebp)
80483c1: 8b 45 f8 mov 0xfffffff8(%ebp),%eax
80483c4: 89 44 24 04 mov %eax,0x4(%esp)
80483c8: 8b 45 f4 mov 0xfffffff4(%ebp),%eax
80483cb: 89 04 24 mov %eax,(%esp)
80483ce: e8 82 ff ff ff call 8048355 <fun1>
80483d3: 89 45 fc mov %eax,0xfffffffc(%ebp)
80483d6: 8b 45 fc mov 0xfffffffc(%ebp),%eax
80483d9: c9 leave
80483da: c3 ret
80483db: 90 nop
080483dc <__libc_csu_init>:
80483dc: 55 push %ebp
80483dd: 89 e5 mov %esp,%ebp
80483df: 57 push %edi
80483e0: 56 push %esi
80483e1: 53 push %ebx
80483e2: 83 ec 0c sub $0xc,%esp
80483e5: e8 00 00 00 00 call 80483ea <__libc_csu_init+0xe>
80483ea: 5b pop %ebx
80483eb: 81 c3 de 11 00 00 add $0x11de,%ebx
80483f1: e8 5e fe ff ff call 8048254 <_init>
80483f6: 8d 83 20 ff ff ff lea 0xffffff20(%ebx),%eax
80483fc: 8d 93 20 ff ff ff lea 0xffffff20(%ebx),%edx
8048402: 89 45 f0 mov %eax,0xfffffff0(%ebp)
8048405: 29 d0 sub %edx,%eax
8048407: 31 f6 xor %esi,%esi
8048409: c1 f8 02 sar $0x2,%eax
804840c: 39 c6 cmp %eax,%esi
804840e: 73 16 jae 8048426 <__libc_csu_init+0x4a>
8048410: 89 d7 mov %edx,%edi
8048412: 89 f6 mov %esi,%esi
8048414: ff 14 b2 call *(%edx,%esi,4)
8048417: 8b 4d f0 mov 0xfffffff0(%ebp),%ecx
804841a: 29 f9 sub %edi,%ecx
804841c: 46 inc %esi
804841d: c1 f9 02 sar $0x2,%ecx
8048420: 39 ce cmp %ecx,%esi
8048422: 89 fa mov %edi,%edx
8048424: 72 ee jb 8048414 <__libc_csu_init+0x38>
8048426: 83 c4 0c add $0xc,%esp
8048429: 5b pop %ebx
804842a: 5e pop %esi
804842b: 5f pop %edi
804842c: c9 leave
804842d: c3 ret
804842e: 89 f6 mov %esi,%esi
08048430 <__libc_csu_fini>:
8048430: 55 push %ebp
8048431: 89 e5 mov %esp,%ebp
8048433: 57 push %edi
8048434: 56 push %esi
8048435: 53 push %ebx
8048436: e8 00 00 00 00 call 804843b <__libc_csu_fini+0xb>
804843b: 5b pop %ebx
804843c: 81 c3 8d 11 00 00 add $0x118d,%ebx
8048442: 8d 83 20 ff ff ff lea 0xffffff20(%ebx),%eax
8048448: 8d bb 20 ff ff ff lea 0xffffff20(%ebx),%edi
804844e: 29 f8 sub %edi,%eax
8048450: c1 f8 02 sar $0x2,%eax
8048453: 83 ec 0c sub $0xc,%esp
8048456: 8d 70 ff lea 0xffffffff(%eax),%esi
8048459: eb 05 jmp 8048460 <__libc_csu_fini+0x30>
804845b: 90 nop
804845c: ff 14 b7 call *(%edi,%esi,4)
804845f: 4e dec %esi
8048460: 83 fe ff cmp $0xffffffff,%esi
8048463: 75 f7 jne 804845c <__libc_csu_fini+0x2c>
8048465: e8 56 00 00 00 call 80484c0 <_fini>
804846a: 83 c4 0c add $0xc,%esp
804846d: 5b pop %ebx
804846e: 5e pop %esi
804846f: 5f pop %edi
8048470: c9 leave
8048471: c3 ret
8048472: 90 nop
8048473: 90 nop
8048474: 90 nop
8048475: 90 nop
8048476: 90 nop
8048477: 90 nop
8048478: 90 nop
8048479: 90 nop
804847a: 90 nop
804847b: 90 nop
804847c: 90 nop
804847d: 90 nop
804847e: 90 nop
804847f: 90 nop
08048480 <__do_global_ctors_aux>:
8048480: 55 push %ebp
8048481: 89 e5 mov %esp,%ebp
8048483: 53 push %ebx
8048484: 83 ec 04 sub $0x4,%esp
8048487: a1 e8 94 04 08 mov 0x80494e8,%eax
804848c: 83 f8 ff cmp $0xffffffff,%eax
804848f: 74 1c je 80484ad <__do_global_ctors_aux+0x2d>
8048491: bb e8 94 04 08 mov $0x80494e8,%ebx
8048496: 8d 76 00 lea 0x0(%esi),%esi
8048499: 8d bc 27 00 00 00 00 lea 0x0(%edi),%edi
80484a0: ff d0 call *%eax
80484a2: 8b 43 fc mov 0xfffffffc(%ebx),%eax
80484a5: 83 eb 04 sub $0x4,%ebx
80484a8: 83 f8 ff cmp $0xffffffff,%eax
80484ab: 75 f3 jne 80484a0 <__do_global_ctors_aux+0x20>
80484ad: 58 pop %eax
80484ae: 5b pop %ebx
80484af: 5d pop %ebp
80484b0: c3 ret
80484b1: 90 nop
80484b2: 90 nop
80484b3: 90 nop
Disassembly of section .my_section:
080484b4 <.my_section>:
80484b4: e8 87 fe ff ff call 8048340 <fun2>
80484b9: e8 82 fe ff ff call 8048340 <fun2>
Disassembly of section .fini:
080484c0 <_fini>:
80484c0: 55 push %ebp
80484c1: 89 e5 mov %esp,%ebp
80484c3: 53 push %ebx
80484c4: e8 00 00 00 00 call 80484c9 <_fini+0x9>
80484c9: 5b pop %ebx
80484ca: 81 c3 ff 10 00 00 add $0x10ff,%ebx
80484d0: 50 push %eax
80484d1: e8 0a fe ff ff call 80482e0 <__do_global_dtors_aux>
80484d6: 59 pop %ecx
80484d7: 5b pop %ebx
80484d8: c9 leave
80484d9: c3 ret
[-- Attachment #4: log2 --]
[-- Type: application/octet-stream, Size: 4406 bytes --]
The section .debug_aranges contains:
Length: 36
Version: 2
Offset into .debug_info: 0
Pointer Size: 4
Segment Size: 0
Address Length
08048334 10
080484b4 10
Length: 28
Version: 2
Offset into .debug_info: 58
Pointer Size: 4
Segment Size: 0
Address Length
08048340 155
Contents of the .debug_pubnames section:
Length: 41
Version: 2
Offset into .debug_info section: 88
Size of area in .debug_info section: 319
Offset Name
92 fun2
164 fun1
255 main
The section .debug_info contains:
Compilation Unit @ 0:
Length: 84
Version: 2
Abbrev Offset: 0
Pointer Size: 4
<0><b>: Abbrev Number: 1 (DW_TAG_compile_unit)
DW_AT_stmt_list : 0
DW_AT_name : s2.s
DW_AT_comp_dir : /home/qinwei/GJ283/code/build_linux/debug-gdb
DW_AT_producer : GNU AS 2.15.92.0.2
DW_AT_language : 32769 (MIPS assembler)
Compilation Unit @ 58:
Length: 315
Version: 2
Abbrev Offset: 16
Pointer Size: 4
<0><63>: Abbrev Number: 1 (DW_TAG_compile_unit)
DW_AT_stmt_list : 62
DW_AT_high_pc : 0x80483db
DW_AT_low_pc : 0x8048340
DW_AT_producer : GNU C 4.0.2
DW_AT_language : 1 (ANSI C)
DW_AT_name : tp_bt1.c
DW_AT_comp_dir : /home/qinwei/GJ283/code/build_linux/debug-gdb
<1><b4>: Abbrev Number: 2 (DW_TAG_subprogram)
DW_AT_sibling : <f5>
DW_AT_external : 1
DW_AT_name : fun2
DW_AT_decl_file : 1
DW_AT_decl_line : 3
DW_AT_prototyped : 1
DW_AT_type : <f5>
DW_AT_low_pc : 0x8048340
DW_AT_high_pc : 0x8048355
DW_AT_frame_base : 1 byte block: 55 (DW_OP_reg5)
<2><d0>: Abbrev Number: 3 (DW_TAG_formal_parameter)
DW_AT_name : x
DW_AT_decl_file : 1
DW_AT_decl_line : 2
DW_AT_type : <f5>
DW_AT_location : 2 byte block: 75 8 (DW_OP_breg5: 8)
<2><dc>: Abbrev Number: 3 (DW_TAG_formal_parameter)
DW_AT_name : y
DW_AT_decl_file : 1
DW_AT_decl_line : 2
DW_AT_type : <f5>
DW_AT_location : 2 byte block: 75 c (DW_OP_breg5: 12)
<2><e8>: Abbrev Number: 4 (DW_TAG_variable)
DW_AT_name : z
DW_AT_decl_file : 1
DW_AT_decl_line : 4
DW_AT_type : <f5>
DW_AT_location : 2 byte block: 75 7c (DW_OP_breg5: -4)
<1><f5>: Abbrev Number: 5 (DW_TAG_base_type)
DW_AT_name : int
DW_AT_byte_size : 4
DW_AT_encoding : 5 (signed)
<1><fc>: Abbrev Number: 2 (DW_TAG_subprogram)
DW_AT_sibling : <157>
DW_AT_external : 1
DW_AT_name : fun1
DW_AT_decl_file : 1
DW_AT_decl_line : 11
DW_AT_prototyped : 1
DW_AT_type : <f5>
DW_AT_low_pc : 0x8048355
DW_AT_high_pc : 0x8048389
DW_AT_frame_base : 1 byte block: 55 (DW_OP_reg5)
<2><118>: Abbrev Number: 3 (DW_TAG_formal_parameter)
DW_AT_name : k
DW_AT_decl_file : 1
DW_AT_decl_line : 10
DW_AT_type : <f5>
DW_AT_location : 2 byte block: 75 8 (DW_OP_breg5: 8)
<2><124>: Abbrev Number: 3 (DW_TAG_formal_parameter)
DW_AT_name : l
DW_AT_decl_file : 1
DW_AT_decl_line : 10
DW_AT_type : <f5>
DW_AT_location : 2 byte block: 75 c (DW_OP_breg5: 12)
<2><130>: Abbrev Number: 4 (DW_TAG_variable)
DW_AT_name : m
DW_AT_decl_file : 1
DW_AT_decl_line : 12
DW_AT_type : <f5>
DW_AT_location : 2 byte block: 75 74 (DW_OP_breg5: -12)
<2><13c>: Abbrev Number: 4 (DW_TAG_variable)
DW_AT_name : n
DW_AT_decl_file : 1
DW_AT_decl_line : 12
DW_AT_type : <f5>
DW_AT_location : 2 byte block: 75 78 (DW_OP_breg5: -8)
<2><148>: Abbrev Number: 4 (DW_TAG_variable)
DW_AT_name : ret
DW_AT_decl_file : 1
DW_AT_decl_line : 13
DW_AT_type : <f5>
DW_AT_location : 2 byte block: 75 7c (DW_OP_breg5: -4)
<1><157>: Abbrev Number: 6 (DW_TAG_subprogram)
DW_AT_external : 1
DW_AT_name : main
[-- Attachment #5: s2.s --]
[-- Type: application/octet-stream, Size: 81 bytes --]
.section .my_section,"ax"
call fun2
call fun2
.text
call fun1
call fun1
prev parent reply other threads:[~2007-03-28 2:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-23 7:22 qinwei
2007-03-23 11:58 ` Daniel Jacobowitz
2007-03-27 4:08 ` qinwei
2007-03-27 11:16 ` Daniel Jacobowitz
2007-03-28 2:46 ` qinwei [this message]
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