705 lines
21 KiB
NASM
705 lines
21 KiB
NASM
TITLE PROFIL - MS-DOS Profile program
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;Profiler for MS-DOS 1.25 2.00
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;
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; Lots of stuff stolen from debug.
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; User provides # of paragraphs per bucket, program is cut up accordingly.
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; User also specifies clock interval
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;System calls
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PRINTBUF EQU 9
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SETDMA EQU 26
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CREATE EQU 22
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OPEN EQU 15
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CLOSE EQU 16
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GETBUF EQU 10
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BLKWRT EQU 40
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BLKRD EQU 39
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OUTCH EQU 2
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SETBASE EQU 38
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FCB EQU 5CH
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BUFLEN EQU 80
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; FCB offsets
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RR EQU 33
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RECLEN EQU 14
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FILELEN EQU 16
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;Segments in load order
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CODE SEGMENT PUBLIC
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CODE ENDS
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DATA SEGMENT BYTE
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DATA ENDS
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INIT SEGMENT BYTE
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INIT ENDS
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DG GROUP CODE,DATA,INIT
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;The data segment
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DATA SEGMENT BYTE
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ORG 0
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ENDMES DB 13,10,"Program terminated normally",13,10,"$"
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ABORTMES DB 13,10,"Program aborted",13,10,"$"
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TOOBIG DB "Program too big",13,10,"$"
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EXEBAD DB "EXE file bad",13,10,"$"
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OUT_FCB LABEL WORD
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DB 0
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OUTNAME DB " PRF"
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DB 30 DUP(0)
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DB 80H DUP(?)
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STACK LABEL WORD
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BYTEBUF DB BUFLEN DUP(?) ;Processed input queue
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AXSAVE DW ? ;See interrupt routine
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BXSAVE DW ? ; " " "
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PROG_AREA DW ? ;Segment of program start
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;EXE file header
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RUNVAR LABEL WORD
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RELPT DW ?
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LASTP LABEL WORD
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RELSEG DW ?
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PSIZE LABEL WORD
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PAGES DW ?
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RELCNT DW ?
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HEADSIZ DW ?
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DW ?
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LOADLOW DW ?
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PROG_SS LABEL WORD ;Program stack seg
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INITSS DW ?
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PROG_SP LABEL WORD ;Program SP
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INITSP DW ?
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DW ?
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PROG_ENTRY EQU THIS DWORD
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PROG_RA LABEL WORD ;Program start offset
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INITIP DW ?
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PROG_SA LABEL WORD ;Program start segment (may be different from PROG_AREA)
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INITCS DW ?
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RELTAB DW ?
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RUNVARSIZ EQU $-RUNVAR
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EXEFILE DB 0 ;Flag to indicate EXE file
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DRV_VALID DW ? ;Init for AX register
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OUTPUT_DATA LABEL WORD ;Start of the profile data
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CLOCK_GRAIN DW ? ;Clock interval micro-seconds
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BUCKET_NUM DW ? ;Number of buckets
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BUCKET_SIZE DW ? ;Paragraphs per bucket
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PROG_LOW_PA DW ? ;Start of program (PARA #)
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PROG_HIGH_PA DW ? ;End of program (PARA #)
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DOS_PA DW ? ;IO-DOS PARA boundry
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HIT_IO DW 0 ;IO bucket
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HIT_DOS DW 0 ;DOS bucket
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HIT_HIGH DW 0 ;Above Program bucket
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NUM_DATA_WORDS EQU ($-OUTPUT_DATA)/2 ;Number of word items
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BUCKET LABEL WORD ;Bucket count area
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;The following data will be overwritten when the buckets are initialized
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LINEBUF DB BUFLEN,1,0DH ;Raw input buffer
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DB BUFLEN DUP(?)
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NOFILE DB "File not found",13,10,"$"
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OUTERR DB "Cannot open output file",13,10,"$"
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GRAIN_PROMPT DB "Sample time (micro-sec) >= 60 ? ","$"
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SIZE_PROMPT DB "Number of paragraphs (16 bytes) per bucket? ","$"
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PARAM_PROMPT DB "Parameters to program? ","$"
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DATA ENDS
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;The resident code portion
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CODE SEGMENT PUBLIC
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ASSUME CS:DG,DS:DG,ES:DG,SS:DG
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;The clock interrupt routine
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PUBLIC CLK_INTER
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;Stuff provided by external clock handler routine
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EXTRN CLOCKON:NEAR,CLOCKOFF:NEAR,LEAVE_INT:NEAR
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ORG 100H
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START:
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CLD
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MOV SP,OFFSET DG:STACK ;Use internal stack
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CALL SETUP
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;The following setup stuff cannot be done in SETUP because we're probably
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; overwritting the INIT area
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MOV DX,[PROG_AREA]
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MOV AH,SETBASE
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INT 21H ;Set base for program
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MOV ES,[PROG_AREA]
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PUSH SI ;Points to BYTEBUF
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MOV DI,81H ;Set unformatted params
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COMTAIL:
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LODSB
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STOSB
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CMP AL,13
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JNZ COMTAIL
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SUB DI,82H ;Figure length
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XCHG AX,DI
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MOV BYTE PTR ES:[80H],AL
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POP SI
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MOV DI,FCB ;First param
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MOV AX,2901H
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INT 21H
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MOV BYTE PTR [DRV_VALID],AL
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MOV AX,2901H
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MOV DI,6CH ;Second param
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INT 21H
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MOV BYTE PTR [DRV_VALID+1],AL
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MOV AX,ES ;Prog segment to AX
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MOV DX,[PROG_RA] ;Offset
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CMP [EXEFILE],1
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JZ EXELOAD ;EXE file
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JMP BINFIL ;Regular file (.COM)
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EXELOAD:
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MOV AX,[HEADSIZ] ;Size of header in paragraphs
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ADD AX,31
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MOV CL,4
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ROL AX,CL ;Size in bytes
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MOV BX,AX
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AND AX,0FE00H
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AND BX,0FH
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MOV WORD PTR DS:[FCB+RR],AX ;Position in file of program
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MOV WORD PTR DS:[FCB+RR+2],BX ;Record size
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MOV DX,[PAGES] ;Size in 512 byte blocks
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DEC DX
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XCHG DH,DL
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ROL DX,1
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MOV DI,DX
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MOV SI,DX
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AND DI,0FE00H
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AND SI,1FFH
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SUB DI,AX
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SBB SI,BX
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MOV AX,[LASTP]
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OR AX,AX
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JNZ PARTP
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MOV AX,200H
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PARTP:
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ADD DI,AX
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ADC SI,0
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MOV AX,DI
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ADD AX,15
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AND AL,0F0H
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OR AX,SI
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MOV CL,4
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ROR AX,CL
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XCHG AX,CX
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MOV BX,[PROG_AREA]
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ADD BX,10H
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MOV AX,WORD PTR DS:[2]
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SUB AX,CX
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MOV DX,OFFSET DG:TOOBIG
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JB ERROR
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CMP BX,AX
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JA ERROR
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CMP [LOADLOW],-1
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JNZ LOADEXE
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XCHG AX,BX
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LOADEXE:
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MOV BP,AX
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XOR DX,DX
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CALL READ
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JC HAVEXE
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BADEXE:
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MOV DX,OFFSET DG:EXEBAD
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ERROR:
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MOV AH,PRINTBUF ;Print the message in DX
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INT 21H
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INT 20H ;Exit
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HAVEXE:
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MOV AX,[RELTAB] ;Get position of relocation table
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MOV WORD PTR DS:[FCB+RR],AX
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MOV WORD PTR DS:[FCB+RR+2],0
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MOV DX,OFFSET DG:RELPT ;Four byte buffer
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MOV AH,SETDMA
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INT 21H
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CMP [RELCNT],0
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JZ NOREL
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RELOC:
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MOV AH,BLKRD
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MOV DX,FCB
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MOV CX,4
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INT 21H ;Read in one relocation pointer
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OR AL,AL
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JNZ BADEXE
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MOV DI,[RELPT] ;Pointer offset
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MOV AX,[RELSEG] ;pointer segment
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ADD AX,BP ;Bias with actual load segment
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MOV ES,AX
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ADD ES:[DI],BP ;Relocate
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DEC [RELCNT]
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JNZ RELOC
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NOREL:
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ADD [INITSS],BP
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ADD [INITCS],BP
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JMP SHORT PROGGO
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BINFIL:
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MOV WORD PTR DS:[FCB+RECLEN],1
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MOV SI,-1
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MOV DI,SI
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CALL READ
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MOV ES,[PROG_SA] ;Prog segment to ES
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MOV AX,WORD PTR ES:[6]
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MOV [PROG_SP],AX ;Default SP for non EXE files
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DEC AH
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MOV WORD PTR ES:[6],AX ;Fix size
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PROGGO:
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PUSH DS
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MOV AX,[PROG_AREA]
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MOV DS,AX
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MOV DX,80H
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MOV AH,SETDMA
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INT 21H ;Set default disk transfer address
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POP DS
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MOV BX,[BUCKET_NUM]
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SHL BX,1 ;Mult by 2 to get #bytes in bucket area
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CLEAR:
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MOV BUCKET[BX],0 ;Zero counts
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SUB BX,2
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JGE CLEAR
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MOV DX,[CLOCK_GRAIN]
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PUSH DS
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POP ES
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CLI ;Don't collect data yet
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CALL CLOCKON ;Set the interrupt
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MOV SI,[PROG_RA]
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MOV DI,[PROG_AREA]
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MOV BX,[PROG_SS]
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MOV CX,[PROG_SP]
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MOV AX,[DRV_VALID]
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MOV DX,[PROG_SA]
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MOV SS,BX
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MOV SP,CX
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XOR CX,CX
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PUSH CX ;0 on prog stack
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PUSH DX
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PUSH SI
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MOV DS,DI ;Set up segments
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MOV ES,DI
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STI ;Start collecting data
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XXX PROC FAR
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RET ;Hop to program
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XXX ENDP
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READ:
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; AX:DX is disk transfer address (segment:offset)
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; SI:DI is 32 bit length
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RDLOOP:
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MOV BX,DX
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AND DX,000FH
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MOV CL,4
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SHR BX,CL
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ADD AX,BX
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PUSH AX
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PUSH DX
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PUSH DS
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MOV DS,AX
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MOV AH,SETDMA
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INT 21H
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POP DS
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MOV DX,FCB
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MOV CX,0FFF0H ;Keep request in segment
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OR SI,SI ;Need > 64K?
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JNZ BIGRD
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MOV CX,DI ;Limit to amount requested
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BIGRD:
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MOV AH,BLKRD
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INT 21H
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SUB DI,CX ;Subtract off amount done
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SBB SI,0 ;Ripple carry
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CMP AL,1 ;EOF?
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POP DX
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POP AX ;Restore transfer address
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JZ RET10
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ADD DX,CX ;Bump transfer address by last read
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MOV BX,SI
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OR BX,DI ;Finished with request
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JNZ RDLOOP
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RET10: STC
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RET
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;Return here on termination or abort
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TERMINATE:
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CLI ;Stop collecting data
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MOV DX,OFFSET DG:ENDMES
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JMP SHORT WRITEOUT
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ABORT:
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CLI ;Stop collecting data
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MOV DX,OFFSET DG:ABORTMES
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WRITEOUT:
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MOV AX,CS
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MOV DS,AX
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MOV SS,AX
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MOV SP,OFFSET DG:STACK ;Use internal stack
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PUSH DX
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CALL CLOCKOFF ;Restore original clock routine
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STI ;Back to normal clock
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POP DX
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MOV AH,PRINTBUF
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INT 21H ;Apropriate termination message
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MOV [OUT_FCB+14],2 ;Word size records
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MOV DX,OFFSET DG:OUTPUT_DATA
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MOV AH,SETDMA
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INT 21H ;Set the transfer address
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MOV CX,NUM_DATA_WORDS
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ADD CX,[BUCKET_NUM]
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MOV DX,OFFSET DG:OUT_FCB
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MOV AH,BLKWRT
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INT 21H ;Write out data
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MOV DX,OFFSET DG:OUT_FCB
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MOV AH,CLOSE
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INT 21H
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INT 20H ;Exit
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;The clock interrupt routine
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CLK_INTER PROC NEAR
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CLI
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PUSH DS
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PUSH CS
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POP DS ;Get profile segment
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MOV [AXSAVE],AX
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MOV [BXSAVE],BX
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POP AX ;old DS
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MOV BX,OFFSET DG:LEAVE_INT
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PUSH BX
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PUSH AX
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PUSH ES
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PUSH [AXSAVE]
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PUSH [BXSAVE]
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PUSH CX
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PUSH DX
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;Stack looks like this
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;
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; +18 OLDFLAGS
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; +16 OLDCS
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; +14 OLDIP
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; +12 RETURN TO LEAVE_INT
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; +10 OLDDS
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; +8 OLDES
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; +6 OLDAX
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; +4 OLDBX
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; +2 OLDCX
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;SP-> OLDDX
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MOV BX,SP
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LES BX,DWORD PTR SS:[BX+14] ;Get CS:IP
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MOV AX,BX
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MOV CL,4
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SHR AX,CL
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MOV CX,ES
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ADD AX,CX ;Paragraph of CS:IP
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CMP AX,[DOS_PA] ;Below DOS?
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JB IOHIT
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CMP AX,[PROG_LOW_PA] ;Below program?
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JB DOSHIT
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CMP AX,[PROG_HIGH_PA] ;Above program?
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JAE MISSH
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SUB AX,[PROG_LOW_PA] ;Paragraph offset
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XOR DX,DX
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DIV [BUCKET_SIZE]
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MOV BX,AX
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SHL BX,1 ;Mult by 2 to get byte offset
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INC BUCKET[BX]
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JMP SHORT DONE
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IOHIT:
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INC [HIT_IO]
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JMP SHORT DONE
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DOSHIT:
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INC [HIT_DOS]
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JMP SHORT DONE
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MISSH:
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INC [HIT_HIGH]
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DONE:
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POP DX
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POP CX
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POP BX
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POP AX
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POP ES
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POP DS
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STI
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RET ;To LEAVE_INT
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CLK_INTER ENDP
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CODE ENDS
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;The init segment contains code to process input parameters
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; It will be blasted as soon as the program to be run is read in
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; And/or the bucket area is initialized
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INIT SEGMENT BYTE
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ORG 0
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SETUP:
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MOV DX,FCB
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MOV AH,OPEN
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INT 21H ;Open program file
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AND AL,AL
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JZ OPENOK
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MOV DX,OFFSET DG:NOFILE
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JMP ERROR
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OPENOK:
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XOR BX,BX
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MOV WORD PTR DS:[FCB+RR],BX
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MOV WORD PTR DS:[FCB+RR+2],BX ;RR to 0
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MOV SI,FCB
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MOV DI,OFFSET DG:OUT_FCB
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MOV CX,4
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REP MOVSW
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MOVSB ;Transfer drive spec and file to output
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MOV DX,OFFSET DG:OUT_FCB
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MOV AH,CREATE
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INT 21H ;Try to create the output file
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AND AL,AL
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JZ GETSIZE
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MOV DX,OFFSET DG:OUTERR
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JMP ERROR
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GETSIZE: ;Get bucket size
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MOV DX,OFFSET DG:SIZE_PROMPT
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MOV AH,PRINTBUF
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INT 21H
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CALL INBUF
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CALL SCANB
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JZ GETSIZE ;SCANB went to CR
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XOR BX,BX
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INC BX ;Size >=1
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CALL GETNUM
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JC GETSIZE ;Bad number
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MOV [BUCKET_SIZE],DX
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CMP WORD PTR DS:[FCB+9],5800H+"E" ;"EX"
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JNZ NOTEXE
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CMP BYTE PTR DS:[FCB+11],"E"
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JNZ NOTEXE
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LOADEXEHEAD: ;Load the EXE header
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MOV [EXEFILE],1
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MOV DX,OFFSET DG:RUNVAR ;Read header in here
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MOV AH,SETDMA
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INT 21H
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MOV CX,RUNVARSIZ
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MOV DX,FCB
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MOV WORD PTR DS:[FCB+RECLEN],1
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OR AL,AL
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MOV AH,BLKRD
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INT 21H
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CMP [RELPT],5A4DH ;Magic number
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JZ EXEOK
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JMP BADEXE
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EXEOK:
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MOV AX,[PAGES] ;Size of file in 512 byte blocks
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MOV CL,5
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SHL AX,CL ;Size in paragraphs
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JMP SHORT SETBUCKET
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NOTEXE:
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MOV AX,WORD PTR DS:[FCB+FILELEN]
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MOV DX,WORD PTR DS:[FCB+FILELEN+2] ;Size of file in bytes DX:AX
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ADD AX,15
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ADC DX,0 ;Round to PARA
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MOV CL,4
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SHR AX,CL
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AND AX,0FFFH
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MOV CL,12
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SHL DX,CL
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AND DX,0F000H
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OR AX,DX ;Size in paragraphs to AX
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MOV [PROG_RA],100H ;Default offset
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SETBUCKET:
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PUSH AX ;Save size
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XOR DX,DX
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DIV [BUCKET_SIZE]
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INC AX ;Round up
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MOV [BUCKET_NUM],AX
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MOV BX,OFFSET DG:BUCKET
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SHL AX,1 ;Number of bytes in bucket area
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ADD AX,BX ;Size of profil in bytes
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ADD AX,15 ;Round up to PARA boundry
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MOV CL,4
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SHR AX,CL ;Number of paragraphs in profil
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INC AX ;Insurance
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MOV BX,CS
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ADD AX,BX
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MOV [PROG_AREA],AX
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CMP [EXEFILE],1
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JZ SETBOUNDS
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MOV AX,[PROG_AREA] ;Set up .COM segments
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MOV [PROG_SS],AX
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MOV [PROG_SA],AX
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SETBOUNDS: ;Set the sample window
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MOV BX,10H ;Get start offset
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ADD BX,[PROG_AREA] ;PARA # of start
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MOV [PROG_LOW_PA],BX
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POP AX ;Recall size of PROG in paragraphs
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ADD BX,AX
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MOV [PROG_HIGH_PA],BX
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SETDOS:
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XOR DX,DX
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MOV ES,DX ;look in interrupt area
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MOV DX,WORD PTR ES:[82H] ;From int #20
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MOV [DOS_PA],DX
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PUSH DS
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POP ES
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GETGRAIN: ;Get sample interval
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MOV DX,OFFSET DG:GRAIN_PROMPT
|
||
MOV AH,PRINTBUF
|
||
INT 21H
|
||
CALL INBUF
|
||
CALL SCANB
|
||
JZ GETGRAIN ;SCANB went to CR
|
||
MOV BX,60 ;Grain >=60
|
||
CALL GETNUM
|
||
JC GETGRAIN ;Bad number
|
||
MOV [CLOCK_GRAIN],DX
|
||
|
||
MOV DX,OFFSET DG:PARAM_PROMPT
|
||
MOV AH,PRINTBUF
|
||
INT 21H
|
||
CALL INBUF ;Get program parameters
|
||
|
||
MOV AX,2522H ;Set vector 22H
|
||
MOV DX,OFFSET DG:TERMINATE
|
||
INT 21H
|
||
MOV AL,23H ;Set vector 23H
|
||
MOV DX,OFFSET DG:ABORT
|
||
INT 21H
|
||
RET ;Back to resident code
|
||
|
||
GETNUM: ;Get a number, DS:SI points to buffer, carry set if bad
|
||
XOR DX,DX
|
||
MOV CL,0
|
||
LODSB
|
||
NUMLP:
|
||
SUB AL,"0"
|
||
JB NUMCHK
|
||
CMP AL,9
|
||
JA NUMCHK
|
||
CMP DX,6553
|
||
JAE BADNUM
|
||
MOV CL,1
|
||
PUSH BX
|
||
MOV BX,DX
|
||
SHL DX,1
|
||
SHL DX,1
|
||
ADD DX,BX
|
||
SHL DX,1
|
||
CBW
|
||
POP BX
|
||
ADD DX,AX
|
||
LODSB
|
||
JMP NUMLP
|
||
NUMCHK:
|
||
CMP CL,0
|
||
JZ BADNUM
|
||
CMP BX,DX
|
||
JA BADNUM
|
||
CLC
|
||
RET
|
||
BADNUM:
|
||
STC
|
||
RET
|
||
|
||
INBUF: ;Read in from console, SI points to start on exit
|
||
MOV AH,GETBUF
|
||
MOV DX,OFFSET DG:LINEBUF
|
||
INT 21H
|
||
MOV SI,2 + OFFSET DG:LINEBUF
|
||
MOV DI,OFFSET DG:BYTEBUF
|
||
CASECHK:
|
||
LODSB
|
||
CMP AL,'a'
|
||
JB NOCONV
|
||
CMP AL,'z'
|
||
JA NOCONV
|
||
ADD AL,"A"-"a" ;Convert to upper case
|
||
NOCONV:
|
||
STOSB
|
||
CMP AL,13
|
||
JZ INDONE
|
||
CMP AL,'"'
|
||
JNZ QUOTSCAN
|
||
CMP AL,"'"
|
||
JNZ CASECHK
|
||
QUOTSCAN:
|
||
MOV AH,AL
|
||
KILLSTR:
|
||
LODSB
|
||
STOSB
|
||
CMP AL,13
|
||
JZ INDONE
|
||
CMP AL,AH
|
||
JNZ KILLSTR
|
||
JMP SHORT CASECHK
|
||
|
||
INDONE:
|
||
MOV SI,OFFSET DG:BYTEBUF
|
||
|
||
;Output CR/LF
|
||
|
||
CRLF:
|
||
MOV AL,13
|
||
CALL OUT
|
||
MOV AL,10
|
||
|
||
OUT:
|
||
PUSH AX
|
||
PUSH DX
|
||
AND AL,7FH
|
||
XCHG AX,DX
|
||
MOV AH,OUTCH
|
||
INT 21H
|
||
POP DX
|
||
POP AX
|
||
RET
|
||
|
||
SCANB: ;Scan to first non-blank
|
||
PUSH AX
|
||
SCANNEXT:
|
||
LODSB
|
||
CMP AL," "
|
||
JZ SCANNEXT
|
||
CMP AL,9
|
||
JZ SCANNEXT
|
||
DEC SI
|
||
POP AX
|
||
EOLCHK:
|
||
CMP BYTE PTR[SI],13
|
||
RET
|
||
|
||
INIT ENDS
|
||
END START
|
||
|
||
|