mirror of
https://github.com/qrush/unix.git
synced 2025-07-27 13:02:59 +00:00
0c2256632e
git-svn-id: http://unix-jun72.googlecode.com/svn/trunk@226 44b2186c-a14b-0410-8c95-595313601b93
388 lines
7.9 KiB
ArmAsm
388 lines
7.9 KiB
ArmAsm
Here is a disassembly of the /bin/sh binary from s2.
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Any differences to the jun72 sh.s listing are noted here.
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The two programs are nearly identical with just a few changes.
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Several of these differences point to defects in the jun72 listing
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but some changes appear to just be differences.
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40014: MOV SP,R5
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40016: MOV R5,44574 / save shellarg
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40022: CMPB @2(R5),#55 / look for '-
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40030: BNE 40042
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40032: TRAP 33 / sys intr; 0
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40034: 0
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40036: TRAP 32 / sys quit
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40040: 0
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40042: TRAP 30 / sys getuid
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40044: TST R0
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40046: BNE 40056
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40050: MOVB #43,41634 / store '#' into "at" (prompt)
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40056: CMP (R5),#1 / just one arg, input from tty
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40062: BLE 40142 / branch to newline
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40064: CLR R0
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40066: TRAP 6 / sys close, close 0
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40070: MOV 4(R5),40100 / open argv[1]
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40076: TRAP 5 / sys open
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40100: ..
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40102: 0
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40104: BCC 40136
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40106: JSR R5,40600 / jsr error
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40112: <Input not found\n\0\0>
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40134: TRAP 1 / sys exit
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40136: CLR 41634 / clear "at" (the prompt)
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newline:
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40142: TST 41634 / test if there's a prompt
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40146: BEQ 40162 / branch to newcom
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40150: MOV #1,R0
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40154: TRAP 4 / sys write; at; 2.
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40156: ..
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40160: 2
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newcom:
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40162: MOV 44574,SP / move shellarg to sp
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40166: MOV #41671,R3 / move $parbuf to r3
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40172: MOV #43654,R4 / move $parp to r4
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40176: CLR 43646 / clear infile
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40202: CLR 43650 / clear outfile
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40206: CLR 43644 / clear glflag
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newarg:
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40212: JSR PC,41330 / jsr blank
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40216: JSR R5,41254 / jsr delim
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40222: BR 40336
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40224: MOV R3,-(SP)
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40226: CMP R0,#74 / check for '<
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40232: BNE 40244
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40234: MOV (SP),43646 / save arg pointer to infile
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40240: CLR (SP)
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40242: BR 40302
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40244: CMP R0,#76 / check for '>
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40250: BNE 40262 / bne newchar
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40252: MOV (SP),43650 / save arg to outfile
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40256: CLR (SP)
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40260: BR 40302
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newchar:
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40262: CMP #40,R0 / check for space (' )
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40266: BEQ 40316
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40270: CMP #212,R0 / check for '\n + 200 (\n preceded by \)
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40274: BEQ 40316
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40276: JSR PC,40666 / jsr putc
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40302: JSR PC,41352 / jsr getc
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40306: JSR R5,41254 / jsr delim
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40312: BR 40316
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40314: BR 40262 / br newchar
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40316: CLRB (R3)+
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40320: MOV (SP)+,(R4)+
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40322: BNE 40326
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40324: TST -(R4)
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40326: JSR R5,41254 / jsr delim
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40332: BR 40336
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40334: BR 40212 / br newarg
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40336: CLR (R4)
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40340: MOV R0,-(SP)
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40342: JSR PC,40400 / jsr docom
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40346: CMPB (SP),#46 / check for '&
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40352: BEQ 40162 / beq newcom
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40354: TST R1
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40356: BEQ 40370
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40360: TRAP 7 / sys wait
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40362: BCS 40370
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40364: CMP R0,R1
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40366: BNE 40360
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40370: CMP (SP),#12 / check for '\n
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40374: BEQ 40142 / beq newline
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40376: BR 40162
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docom:
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40400: SUB #43654,R4 / sub $parp, r4
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40404: BNE 40412
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40406: CLR R1
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40410: RTS PC
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40412: JSR R5,40642 / jsr chcom
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40416: qchdir
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40420: BR 40516
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40422: CMP R4,#4
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40426: BEQ 40452
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40430: JSR R5,40600 / jsr error
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40434: <Arg count\n\0\0>
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40450: BR 40512
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40452: MOV 43656,40462 / move parp+2 to ...
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40460: TRAP 14 / sys chdir
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40462: ...
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40464: BCC 40512
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40466: JSR R5,40600 / jsr error
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40472: <Bad directory\n\0\0>
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40512: CLR R1
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40514: RTS PC
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40516: JSR R5,40642 / jsr chcom
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40522: qlogin
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40524: BR 40542
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40526: TRAP 13
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40530: BIC (SP),@43654(R1)
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40534: TRAP 13
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40536: BIC (SP),43654(R4)
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40542: TRAP 2
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40544: BR 40774
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40546: BCC 40574
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40550: JSR R5,40600
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40554: DIV (R4)+,R1
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40556: CMP R1,@63541(R1)
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40562: ADD -(R5),-(R1)
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40564: COM @-(SP)
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40566: HALT
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40570: JMP 40142
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40574: MOV R0,R1
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40576: RTS PC
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error:
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40600: MOVB (R5)+,44572
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40604: BEQ 40622
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40606: MOV #1,R0
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40612: TRAP 4
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40614: BIC -(R5),@1(R2)
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40620: BR 40600
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40622: INC R5
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40624: BIC #1,R5
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40630: CLR R0
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40632: TRAP 23 / sysseek
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40634: 0
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40636: 2
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40640: RTS R5 / XXX not in jun72 sh.s!
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chcom:
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40642: MOV (R5)+,R1
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40644: MOV #41671,R2
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40650: MOVB (R1)+,R0
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40652: CMPB (R2)+,R0
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40654: BNE 40664
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40656: TST R0
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40660: BNE 40650
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40662: TST (R5)+
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40664: RTS R5
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40666: CMP R0,#47
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40672: BEQ 40712
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40674: CMP R0,#42
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40700: BEQ 40712
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40702: BIC #177600,R0
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40706: MOVB R0,(R3)+
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40710: RTS PC
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40712: MOV R0,-(SP)
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40714: JSR PC,41352
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40720: CMP R0,#12
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40724: BNE 40754
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40726: JSR R5,40600 / jsr error
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40732: <"' imbalance\n\0>
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40750: JMP 40142 / jmp newline
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40754: CMP R0,(SP)
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40756: BEQ 40770
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40760: BIC #177600,R0
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40764: MOVB R0,(R3)+
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40766: BR 40714
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40770: TST (SP)+
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40772: RTS PC
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40774: MOV 43646,41020
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41002: BEQ 41050
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41004: TSTB @41020
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41010: BEQ 41026
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41012: CLR R0
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41014: TRAP 6
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41016: TRAP 5
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41020: BIC R0,R0
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41022: HALT
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41024: BCC 41050
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41026: JSR R5,40600
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41032: ADD @72560(R1),(R1)
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41036: CMP R1,64546(R4)
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41042: ADD (R5)+,@-(R4)
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41044: 000012
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41046: TRAP 1
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41050: MOV 43650,R2
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41054: BEQ 41172
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41056: CMPB (R2),#76
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41062: BNE 41102
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41064: INC R2
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41066: MOV R2,41074
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41072: TRAP 5
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41074: BIC R0,R0
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41076: WAIT
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41100: BCC 41142
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41102: MOV R2,41110
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41106: TRAP 10
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41110: BIC R0,R0
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41112: 000017
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41114: BCC 41142
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41114: BCC 41142
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41116: JSR R5,40600
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41122: ASH (PC),R5
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41124: MUL 72165(R4),R1
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41130: ADD @(R0)+,-(R0)
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41132: ADD 5145(R1),@-(R1)
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41136: HALT
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41140: TRAP 1
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41142: TRAP 6
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41144: MOV R2,41160
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41150: MOV #1,R0
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41154: TRAP 6 / sysclose
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41156: TRAP 5 / sysopen
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41160: ..
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41162: 1
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41164: TRAP 23 / sysseek
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41166: 0
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41170: 2
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41172: TST 43644
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41176: BNE 41236
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41200: TRAP 13 / sysexec
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41202: 41671 / parbuf
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41204: 43654 / parp
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41206: TRAP 13 / sysexec
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41210: 41664 / binpb "/bin/"
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41212: 43654 / parp
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/ XXX jun72 srcs has
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/ sys stat; binpb; inbuf
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/ bes 2f
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/ mov $shell,parp-2
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/ mov $binpb, parp
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/ sys exec; shell; parp-2
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/ here..
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/ XXX this is not in the jun72 srcs!
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41214: JSR R5,40600 / error
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41220: <No command\n\0>
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41234: TRAP 1 / sysexit
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41236: MOV #41652,43652
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41244: TRAP 13 / sysexec
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41246: 41652 / </etc/glob\0>
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41250: 43652 / parp-2
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41252: BR 41214
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delim:
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41254: CMP R0,#12 / check '\n
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41260: BEQ 41326
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41262: CMP R0,#46 / check '&
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41266: BEQ 41326
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41270: CMP R0,#73 / check ';
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41274: BEQ 41326
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41276: CMP R0,#77 / check '?
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41302: BEQ 41320
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/ XXX not in jun72
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41304: CMP R0,#52 / check '*
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41310: BEQ 41320
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/ XXX end jun72
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41312: CMP R0,#133 / check '[
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41316: BNE 41324
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41320: INC 43644
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41324: TST (R5)+
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41326: RTS R5
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41330: JSR PC,41352
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41334: CMP #40,R0
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41340: BEQ 41330
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41342: CMP R0,#212
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41346: BEQ 41330
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41350: RTS PC
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41352: TST 43642
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41356: BNE 41444
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41360: MOV 44566,R1
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41364: CMP R1,44570
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41370: BNE 41400
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41372: JSR PC,41536
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41376: BR 41352
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41400: MOVB (R1)+,R0
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41402: MOV R1,44566
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41406: BIS 44564,R0
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41412: CLR 44564
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41416: CMP R0,#134
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41422: BEQ 41434
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41424: CMP R0,#44
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41430: BEQ 41466
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41432: RTS PC
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41434: MOV #200,44564
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41442: BR 41352
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41444: MOVB @43642,R0
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41450: BEQ 41460
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41452: INC 43642
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41456: RTS PC
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41460: CLR 43642
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41464: BR 41352
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41466: JSR PC,41352
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41472: SUB #60,R0
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41476: CMP R0,#11
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41502: BLOS 41510
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41504: MOV #11,R0
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41510: MOV 44574,R1
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41514: INC R0
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41516: CMP R0,(R1)
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41520: BGE 41352
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41522: ASL R0
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41524: ADD R1,R0
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41526: MOV 2(R0),43642
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41534: BR 41352
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41536: MOV #44164,R0
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41542: MOV R0,44566
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41546: MOV R0,44570
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41552: DEC R0
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41554: MOV R0,41570
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41560: INC 41570
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41564: CLR R0
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41566: TRAP 3
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41570: HALT
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41572: WAIT
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41574: BCS 41630
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41576: TST R0
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41600: BEQ 41630
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41602: INC 44570
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41606: CMP 41570,#44564
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41614: BCC 41630
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41616: CMPB @41570,#12
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41624: BNE 41560
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41626: RTS PC
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41630: TRAP 1 / sys exit
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quest:
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41632: <?\n>
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at:
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41634: <@ >
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qchdir:
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41636: <chdir\0>
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glogin:
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41644: <login\0>
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/ XXX jun72 has shell: </bin/sh\0> here.
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glob:
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41652: </etc/glob\0>
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binpb:
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41664: </bin/>
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parbuf: / 41671: 002
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41672: HALT
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41674: HALT
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41676: HALT
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41700: HALT
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41702: HALT
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41704: HALT
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41706: HALT
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41710: HALT
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41712: HALT
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41714: HALT
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41716: HALT
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41720: HALT
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41722: HALT
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41724: HALT
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41726: HALT
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41730: HALT
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41732: HALT
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41734: HALT
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41736: HALT
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41740: HALT
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41742: HALT
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41744: HALT
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41746: HALT
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41750: HALT
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41752: HALT
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41754: HALT
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41756: HALT
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41760: HALT
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41762: HALT
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41764: HALT
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41766: HALT
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41770: HALT
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41772: HALT
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41774: HALT
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41776: HALT
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42000: HALT
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42002: HALT
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42004: HALT
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42006: HALT
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