调试main()到init()到setup()

<bochs:3> b 0x54a7

<bochs:4> c

(0) Breakpoint 2, 0x54a7 in ?? ()

Next at t=16677775

(0) [0x000054a7] 0008:000054a7 (unk. ctxt): retn                      ; c3

<bochs:5> s

Next at t=16677776

(0) [0x0000664c] 0008:0000664c (unk. ctxt): push ebp                  ; 55

<bochs:6> u /100

0000664c: (                    ): push ebp                  ; 55

0000664d: (                    ): mov ebp, esp              ; 89e5

0000664f: (                    ): movzx ecx, word ptr [ds:0x901fc] ; 0fb70dfc010900

00006656: (                    ): mov dword ptr [ds:0x1a964], ecx ; 890d64a90100

0000665c: (                    ): mov eax, 0x90080          ; b880000900

00006661: (                    ): mov edx, 0x1dd6c          ; ba6cdd0100

00006666: (                    ): mov ecx, dword ptr ds:[eax] ; 8b08

00006668: (                    ): mov dword ptr ds:[edx], ecx ; 890a

0000666a: (                    ): mov ecx, dword ptr ds:[eax+0x4] ; 8b4804

0000666d: (                    ): mov dword ptr ds:[edx+0x4], ecx ; 894a04

00006670: (                    ): mov ecx, dword ptr ds:[eax+0x8] ; 8b4808

00006673: (                    ): mov dword ptr ds:[edx+0x8], ecx ; 894a08

00006676: (                    ): mov ecx, dword ptr ds:[eax+0xc] ; 8b480c

00006679: (                    ): mov dword ptr ds:[edx+0xc], ecx ; 894a0c

0000667c: (                    ): mov ecx, dword ptr ds:[eax+0x10] ; 8b4810

0000667f: (                    ): mov dword ptr ds:[edx+0x10], ecx ; 894a10

00006682: (                    ): mov ecx, dword ptr ds:[eax+0x14] ; 8b4814

00006685: (                    ): mov dword ptr ds:[edx+0x14], ecx ; 894a14

00006688: (                    ): mov ecx, dword ptr ds:[eax+0x18] ; 8b4818

0000668b: (                    ): mov dword ptr ds:[edx+0x18], ecx ; 894a18

0000668e: (                    ): mov ecx, dword ptr ds:[eax+0x1c] ; 8b481c

00006691: (                    ): mov dword ptr ds:[edx+0x1c], ecx ; 894a1c

00006694: (                    ): movzx eax, word ptr [ds:0x90002] ; 0fb70502000900

0000669b: (                    ): shl eax, 0xa              ; c1e00a

0000669e: (                    ): add eax, 0x100000         ; 0500001000

000066a3: (                    ): mov [ds:0x18000], ax      ; a300800100

000066a8: (                    ): and dword ptr [ds:0x18000], 0xfffff000 ; 81250080010000f0ffff

000066b2: (                    ): cmp dword ptr [ds:0x18000], 0x1000000 ; 813d0080010000000001

000066bc: (                    ): jle 0x66c8                ; 7e0a

000066be: (                    ): mov dword ptr [ds:0x18000], 0x1000000 ; c7050080010000000001

000066c8: (                    ): cmp dword ptr [ds:0x18000], 0xc00000 ; 813d008001000000c000

000066d2: (                    ): jle 0x66e0                ; 7e0c

000066d4: (                    ): mov dword ptr [ds:0x18004], 0x400000 ; c7050480010000004000

000066de: (                    ): jmp 0x6702                ; eb22

000066e0: (                    ): cmp dword ptr [ds:0x18000], 0x600000 ; 813d0080010000006000

000066ea: (                    ): jle 0x66f8                ; 7e0c

000066ec: (                    ): mov dword ptr [ds:0x18004], 0x200000 ; c7050480010000002000

000066f6: (                    ): jmp 0x6702                ; eb0a

000066f8: (                    ): mov dword ptr [ds:0x18004], 0x100000 ; c7050480010000001000

00006702: (                    ): mov ecx, dword ptr [ds:0x18004] ; 8b0d04800100

00006708: (                    ): mov dword ptr [ds:0x18008], ecx ; 890d08800100

0000670e: (                    ): push dword ptr [ds:0x18000] ; ff3500800100

00006714: (                    ): push dword ptr [ds:0x18004] ; ff3504800100

0000671a: (                    ): call 0xba30               ; e811530000

0000671f: (                    ): call 0x8e94               ; e870270000

00006724: (                    ): call 0x11244              ; e81bab0000

00006729: (                    ): call 0x14efc              ; e8cee70000

0000672e: (                    ): call 0x145dc              ; e8a9de0000

00006733: (                    ): call 0x64b8               ; e880fdffff

00006738: (                    ): call 0x72bc               ; e87f0b0000

0000673d: (                    ): push dword ptr [ds:0x18004] ; ff3504800100

00006743: (                    ): call 0xd55c               ; e8146e0000

00006748: (                    ): call 0x14028              ; e8dbd80000

0000674d: (                    ): call 0x12db0              ; e85ec60000

00006752: (                    ): sti                       ; fb

00006753: (                    ): mov eax, esp              ; 89e0

00006755: (                    ): push 0x17                 ; 6a17

00006757: (                    ): push eax                  ; 50

00006758: (                    ): pushf                     ; 9c

00006759: (                    ): push 0xf                  ; 6a0f

0000675b: (                    ): push 0x6761               ; 6861670000

00006760: (                    ): iret                      ; cf             
move_to_user_mode()

00006761: (                    ): mov eax, 0x17             ; b817000000

00006766: (                    ): opsize mov ds, ax         ; 668ed8

00006769: (                    ): opsize mov es, ax         ; 668ec0

0000676c: (                    ): opsize mov fs, ax         ; 668ee0

0000676f: (                    ): opsize mov gs, ax         ; 668ee8

00006772: (                    ): add esp, 0xc              ; 83c40c

00006775: (                    ): mov eax, 0x2              ; b802000000

0000677a: (                    ): int 0x80                  ; cd80               fork()

0000677c: (                    ): test eax, eax             ; 85c0

0000677e: (                    ): jnl 0x678c                ; 7d0c

00006780: (                    ): neg eax                   ; f7d8

00006782: (                    ): mov [ds:0x1fae4], ax      ; a3e4fa0100

00006787: (                    ): mov eax, 0xffffffff       ; b8ffffffff

0000678c: (                    ): test eax, eax             ; 85c0

0000678e: (                    ): jnz 0x6795                ; 7505

00006790: (                    ): call 0x6884               ; e8ef000000          init()

00006795: (                    ): mov edx, 0x1fae4          ; bae4fa0100

0000679a: (                    ): mov eax, 0x1d             ; b81d000000

0000679f: (                    ): int 0x80                  ; cd80

000067a1: (                    ): test eax, eax             ; 85c0

000067a3: (                    ): jnl 0x679a                ; 7df5

000067a5: (                    ): neg eax                   ; f7d8

000067a7: (                    ): mov dword ptr ds:[edx], eax ; 8902

000067a9: (                    ): jmp 0x679a                ; ebef

000067ab: (                    ): add cl, cl                ; 00c9

000067ad: (                    ): retn                      ; c3

000067ae: (                    ): add byte ptr ds:[eax], al ; 0000

000067b0: (                    ): push ebx                  ; 53

000067b1: (                    ): lea eax, dword ptr ss:[esp+0xc] ; 8d44240c

000067b5: (                    ): push eax                  ; 50

000067b6: (                    ): push dword ptr ss:[esp+0xc] ; ff74240c

000067ba: (                    ): push 0x1d1e0              ; 68e0d10100

000067bf: (                    ): call 0x99e4               ; e820320000

000067c4: (                    ): mov ebx, eax              ; 89c3

000067c6: (                    ): push ebx                  ; 53

000067c7: (                    ): push 0x1d1e0              ; 68e0d10100

000067cc: (                    ): push 0x1                  ; 6a01

000067ce: (                    ): call 0x171e0              ; e80d0a0100

<bochs:7> b 0x6884

<bochs:8> c

(0) Breakpoint 3, 0x4006884 in ?? ()

Next at t=16797174

(0) [0x00006884] 000f:00006884 (unk. ctxt): push ebp                  ; 55

<bochs:9> u /50

04006884: (                    ): push ebp                  ; 55

04006885: (                    ): mov ebp, esp              ; 89e5

04006887: (                    ): sub esp, 0x4              ; 83ec04

0400688a: (                    ): push edi                  ; 57

0400688b: (                    ): push esi                  ; 56

0400688c: (                    ): push ebx                  ; 53

0400688d: (                    ): xor eax, eax              ; 31c0

0400688f: (                    ): mov ebx, 0x1dd6c          ; bb6cdd0100

04006894: (                    ): int 0x80                  ; cd80            
setup()

04006896: (                    ): test eax, eax             ; 85c0

04006898: (                    ): jnl 0x40068a1             ; 7d07

0400689a: (                    ): neg eax                   ; f7d8

0400689c: (                    ): mov [ds:0x1fae4], ax      ; a3e4fa0100

040068a1: (                    ): push 0x0                  ; 6a00

040068a3: (                    ): push 0x2                  ; 6a02

040068a5: (                    ): push 0x6801               ; 6801680000

040068aa: (                    ): call 0x4017198            ; e8e9080100

040068af: (                    ): push 0x0                  ; 6a00

040068b1: (                    ): call 0x4017208            ; e852090100

040068b6: (                    ): push 0x0                  ; 6a00

040068b8: (                    ): call 0x4017208            ; e84b090100

040068bd: (                    ): mov eax, [ds:0x1a960]     ; a160a90100

040068c2: (                    ): shl eax, 0xa              ; c1e00a

040068c5: (                    ): push eax                  ; 50

040068c6: (                    ): push dword ptr [ds:0x1a960] ; ff3560a90100

040068cc: (                    ): push 0x680b               ; 680b680000

040068d1: (                    ): call 0x40067b0            ; e8dafeffff

040068d6: (                    ): add esp, 0x20             ; 83c420

040068d9: (                    ): mov eax, [ds:0x18000]     ; a100800100

040068de: (                    ): sub eax, dword ptr [ds:0x18008] ; 2b0508800100

040068e4: (                    ): push eax                  ; 50

040068e5: (                    ): push 0x6830               ; 6830680000

040068ea: (                    ): call 0x40067b0            ; e8c1feffff

040068ef: (                    ): add esp, 0x8              ; 83c408

040068f2: (                    ): mov eax, 0x2              ; b802000000

040068f7: (                    ): int 0x80                  ; cd80

040068f9: (                    ): test eax, eax             ; 85c0

040068fb: (                    ): jl 0x4006904              ; 7c07

040068fd: (                    ): mov edi, eax              ; 89c7

040068ff: (                    ): jmp 0x4006910             ; eb0f

04006901: (                    ): add byte ptr ds:[eax], al ; 0000

04006903: (                    ): add bh, dh                ; 00f7

04006905: (                    ): fsub dword ptr ds:[ebx+0x1fae4] ; d8a3e4fa0100

0400690b: (                    ): mov edi, 0xffffffff       ; bfffffffff

04006910: (                    ): test edi, edi             ; 85ff

04006912: (                    ): jnz 0x4006954             ; 7540

04006914: (                    ): push 0x0                  ; 6a00

04006916: (                    ): call 0x40171c0            ; e8a5080100

0400691b: (                    ): push 0x0                  ; 6a00

0400691d: (                    ): push 0x0                  ; 6a00

<bochs:10>