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update
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astrotycoon committed Mar 17, 2012
1 parent abe1692 commit 815dbbe
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Showing 4 changed files with 35 additions and 154 deletions.
165 changes: 11 additions & 154 deletions scastest1/debug.s
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Expand Up @@ -11,157 +11,14 @@ Disassembly of section .text:
8048086: ac lods %ds:(%esi),%al
8048087: fc cld
8048088: f2 ae repnz scas %es:(%edi),%al
804808a: 75 13 jne 804809f <notfound>
804808c: 66 2b 0d d8 90 04 08 sub 0x80490d8,%cx
8048093: 66 f7 d9 neg %cx
8048096: b8 01 00 00 00 mov $0x1,%eax
804809b: 89 cb mov %ecx,%ebx
804809d: cd 80 int $0x80

0804809f <notfound>:
804809f: b8 01 00 00 00 mov $0x1,%eax
80480a4: bb 00 00 00 00 mov $0x0,%ebx
80480a9: cd 80 int $0x80

Disassembly of section .data:

080490ac <string1>:
80490ac: 54 push %esp
80490ad: 68 69 73 20 69 push $0x69207369
80490b2: 73 20 jae 80490d4 <string1+0x28>
80490b4: 61 popa
80490b5: 20 74 65 73 and %dh,0x73(%ebp,%eiz,2)
80490b9: 74 20 je 80490db <length+0x3>
80490bb: 2d 20 61 20 6c sub $0x6c206120,%eax
80490c0: 6f outsl %ds:(%esi),(%dx)
80490c1: 6e outsb %ds:(%esi),(%dx)
80490c2: 67 20 74 65 and %dh,0x65(%si)
80490c6: 78 74 js 804913c <_end+0x5c>
80490c8: 20 73 74 and %dh,0x74(%ebx)
80490cb: 72 69 jb 8049136 <_end+0x56>
80490cd: 6e outsb %ds:(%esi),(%dx)
80490ce: 67 20 74 6f and %dh,0x6f(%si)
80490d2: 20 73 63 and %dh,0x63(%ebx)
80490d5: 61 popa
80490d6: 6e outsb %ds:(%esi),(%dx)
80490d7: 2e cs

080490d8 <length>:
80490d8: 2c 00 sub $0x0,%al
...

080490dc <string2>:
80490dc: 2d .byte 0x2d

Disassembly of section .debug_aranges:

00000000 <.debug_aranges>:
0: 1c 00 sbb $0x0,%al
2: 00 00 add %al,(%eax)
4: 02 00 add (%eax),%al
6: 00 00 add %al,(%eax)
8: 00 00 add %al,(%eax)
a: 04 00 add $0x0,%al
c: 00 00 add %al,(%eax)
e: 00 00 add %al,(%eax)
10: 74 80 je ffffff92 <_end+0xf7fb6eb2>
12: 04 08 add $0x8,%al
14: 37 aaa
...

Disassembly of section .debug_info:

00000000 <.debug_info>:
0: 4c dec %esp
1: 00 00 add %al,(%eax)
3: 00 02 add %al,(%edx)
5: 00 00 add %al,(%eax)
7: 00 00 add %al,(%eax)
9: 00 04 01 add %al,(%ecx,%eax,1)
c: 00 00 add %al,(%eax)
e: 00 00 add %al,(%eax)
10: 74 80 je ffffff92 <_end+0xf7fb6eb2>
12: 04 08 add $0x8,%al
14: ab stos %eax,%es:(%edi)
15: 80 04 08 73 addb $0x73,(%eax,%ecx,1)
19: 63 61 73 arpl %sp,0x73(%ecx)
1c: 74 65 je 83 <_start-0x8047ff1>
1e: 73 74 jae 94 <_start-0x8047fe0>
20: 31 2e xor %ebp,(%esi)
22: 73 00 jae 24 <_start-0x8048050>
24: 2f das
25: 68 6f 6d 65 2f push $0x2f656d6f
2a: 61 popa
2b: 73 74 jae a1 <_start-0x8047fd3>
2d: 72 6f jb 9e <_start-0x8047fd6>
2f: 6c insb (%dx),%es:(%edi)
30: 2f das
31: 61 popa
32: 73 6d jae a1 <_start-0x8047fd3>
34: 2f das
35: 73 63 jae 9a <_start-0x8047fda>
37: 61 popa
38: 73 74 jae ae <_start-0x8047fc6>
3a: 65 gs
3b: 73 74 jae b1 <_start-0x8047fc3>
3d: 31 00 xor %eax,(%eax)
3f: 47 inc %edi
40: 4e dec %esi
41: 55 push %ebp
42: 20 41 53 and %al,0x53(%ecx)
45: 20 32 and %dh,(%edx)
47: 2e 32 31 xor %cs:(%ecx),%dh
4a: 2e cs
4b: 35 33 00 01 80 xor $0x80010033,%eax

Disassembly of section .debug_abbrev:

00000000 <.debug_abbrev>:
0: 01 11 add %edx,(%ecx)
2: 00 10 add %dl,(%eax)
4: 06 push %es
5: 11 01 adc %eax,(%ecx)
7: 12 01 adc (%ecx),%al
9: 03 08 add (%eax),%ecx
b: 1b 08 sbb (%eax),%ecx
d: 25 08 13 05 00 and $0x51308,%eax
...

Disassembly of section .debug_line:

00000000 <.debug_line>:
0: 45 inc %ebp
1: 00 00 add %al,(%eax)
3: 00 02 add %al,(%edx)
5: 00 22 add %ah,(%edx)
7: 00 00 add %al,(%eax)
9: 00 01 add %al,(%ecx)
b: 01 fb add %edi,%ebx
d: 0e push %cs
e: 0d 00 01 01 01 or $0x1010100,%eax
13: 01 00 add %eax,(%eax)
15: 00 00 add %al,(%eax)
17: 01 00 add %eax,(%eax)
19: 00 01 add %al,(%ecx)
1b: 00 73 63 add %dh,0x63(%ebx)
1e: 61 popa
1f: 73 74 jae 95 <_start-0x8047fdf>
21: 65 gs
22: 73 74 jae 98 <_start-0x8047fdc>
24: 31 2e xor %ebp,(%esi)
26: 73 00 jae 28 <_start-0x804804c>
28: 00 00 add %al,(%eax)
2a: 00 00 add %al,(%eax)
2c: 00 05 02 74 80 04 add %al,0x4807402
32: 08 03 or %al,(%ebx)
34: 0c 01 or $0x1,%al
36: 67 67 67 21 21 addr32 addr32 and %esp,(%bx,%di)
3b: 2f das
3c: 2f das
3d: 75 3d jne 7c <_start-0x8047ff8>
3f: 59 pop %ecx
40: 2f das
41: 30 59 59 xor %bl,0x59(%ecx)
44: 02 02 add (%edx),%al
46: 00 01 add %al,(%ecx)
48: 01 .byte 0x1
804808a: 75 11 jne 804809d <notfound>
804808c: 2b 0d d8 90 04 08 sub 0x80490d8,%ecx
8048092: f7 d9 neg %ecx
8048094: b8 01 00 00 00 mov $0x1,%eax
8048099: 89 cb mov %ecx,%ebx
804809b: cd 80 int $0x80

0804809d <notfound>:
804809d: b8 01 00 00 00 mov $0x1,%eax
80480a2: bb 00 00 00 00 mov $0x0,%ebx
80480a7: cd 80 int $0x80
Binary file added strsize/strsize
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Binary file added strsize/strsize.o
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24 changes: 24 additions & 0 deletions strsize/strsize.s
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@@ -0,0 +1,24 @@
#strsize.s - Finding the size of a string using the SCAS instruction
.section .data
string:
.asciz "Testing, one, two, three, testing.\n"

.section .text
.globl _start
_start:
leal string, %edi
movl $0xffff, %ecx
movb $0, %al
cld # clear up DF
repne scasb
jne notfound
subw $0xffff, %cx
neg %cx
dec %cx
movl $1, %eax
movl %ecx, %ebx
int $0x80
notfound:
movl $1, %eax
movl $0, %ebx
int $0x80

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