319 lines
11 KiB
Text
319 lines
11 KiB
Text
/* ARM assembly Raspberry PI or android 32 bits */
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/* program notes.s */
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/* REMARK 1 : this program use routines in a include file
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see task Include a file language arm assembly
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for the routine affichageMess conversion10
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see at end of this program the instruction include */
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/* for constantes see task include a file in arm assembly */
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/************************************/
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/* Constantes */
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/************************************/
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.include "../constantes.inc"
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.equ BUFFERSIZE, 10000
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.equ READ, 3 @ system call
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.equ WRITE, 4 @ Linux syscall
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.equ OPEN, 5 @ system call
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.equ CLOSE, 6 @ system call
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.equ O_RDONLY, 0
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.equ O_RDWR, 0x0002 @ open for reading and writing
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.equ O_APPEND, 0x400
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.equ O_CREAT, 0x40
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.equ GETTIME, 0x4e @ call system linux gettimeofday
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/*******************************************/
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/* Structures */
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/********************************************/
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/* example structure time */
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.struct 0
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timeval_sec: @
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.struct timeval_sec + 4
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timeval_usec: @
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.struct timeval_usec + 4
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timeval_end:
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.struct 0
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timezone_min: @
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.struct timezone_min + 4
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timezone_dsttime: @
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.struct timezone_dsttime + 4
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timezone_end:
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/*********************************/
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/* Initialized data */
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/*********************************/
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.data
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szCarriageReturn: .asciz "\n"
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szSpace: .asciz " "
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szLibNoFile: .asciz "no file notes.txt in this directory\n"
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szFileName: .asciz "notes.txt"
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szMessAnoRead: .asciz "Error read file \n"
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szMessAnoTime: .asciz "Error call time \n"
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szMessAnoWrite: .asciz "Error file write \n"
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szMessDate: .asciz " @/@/@ @:@:@ \n" @ message time
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.align 4
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tbDayMonthYear: .int 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335
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.int 366, 397, 425, 456, 486, 517, 547, 578, 609, 639, 670, 700
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.int 731, 762, 790, 821, 851, 882, 912, 943, 974,1004,1035,1065
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.int 1096,1127,1155,1186,1216,1247,1277,1308,1339,1369,1400,1430
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/*********************************/
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/* UnInitialized data */
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/*********************************/
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.bss
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sZoneConv: .skip 24
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stTVal: .skip timeval_end
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stTZone: .skip timezone_end
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sBuffer: .skip BUFFERSIZE
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/*********************************/
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/* code section */
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/*********************************/
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.text
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.global main
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main: @ entry of program
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mov fp,sp @ stack address
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ldr r4,[fp] @ load number of parameters command line
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cmp r4,#1 @ >1 insertion text
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bgt 10f
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ldr r0,iAdrszFileName @ file name
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mov r1,#O_RDONLY @ flags
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mov r2,#0 @ mode in octal
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mov r7,#OPEN @ oen file, create if not exist
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svc 0
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cmp r0,#0 @ error open
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ble 99f @ file no exists ?
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mov r8,r0 @ save FD @ if exist display text
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ldr r1,iAdrsBuffer @ buffer address
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ldr r2,#iBufferSize @ buffersize
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mov r7, #READ @ read file
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svc 0
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cmp r0,#0 @ error read ?
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blt 98f
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ldr r0,iAdrsBuffer @ buffer address
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bl affichageMess @ and display
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b 50f
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10: @ multiple parameters in command line
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ldr r0,iAdrszFileName @ file name
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ldr r1,iFlag @ flags
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mov r2,#0644 @ mode in octal
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mov r7,#OPEN @ open file, create if not exist
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svc 0
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cmp r0,#0 @ error open
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ble 96f
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mov r8,r0 @ save FD
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ldr r0,iAdrstTVal
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ldr r1,iAdrstTZone
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mov r7,#GETTIME @ call system function time
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svc 0
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cmp r0,#-1 @ error ?
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beq 97f
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ldr r0,iAdrstTVal
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bl formatTime @ format date and hour
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mov r1,r0
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mov r2,#0
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11: @ compute length of time message
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ldrb r3,[r1,r2]
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cmp r3,#0
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beq 12f
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add r2,#1
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b 11b
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12:
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mov r0,r8 @ write time message
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mov r7,#WRITE
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svc 0
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cmp r0,#0 @ error ?
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ble 96f
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mov r5,#2 @ start parameters command line
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13:
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mov r0,r8 @ file FD
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ldr r1,[fp,r5,lsl #2] @ load parameter address
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mov r2,#0
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14: @ compute parameter length
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ldrb r3,[r1,r2]
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cmp r3,#0
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beq 15f
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add r2,#1
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b 14b
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15: @ write parameter
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mov r7,#WRITE
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svc 0
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cmp r0,#0 @ error ?
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ble 96f
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mov r0,r8 @ file FD
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ldr r1,iadrszSpace @ write a space betwin parameters
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mov r2,#1
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mov r7,#WRITE
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svc 0
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add r5,#1 @ increment indixe
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cmp r5,r4 @ parameters maxi ?
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ble 13b @ no -> loop
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mov r0,r8
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ldr r1,iAdrszCarriageReturn @ write line end
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mov r2,#1
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mov r7,#WRITE
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svc 0
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50: @ close the file
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mov r0,r8
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mov r7, #CLOSE
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svc 0
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b 100f
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96: @ error write
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ldr r0,iAdrszMessAnoWrite
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bl affichageMess
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b 100f
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97: @ error function time
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ldr r0,iAdrszMessAnoTime
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bl affichageMess
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b 100f
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98: @ error read
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ldr r0,iAdrszMessAnoRead
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bl affichageMess
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b 100f
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99: @ display message no file in this directory
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ldr r0,iAdrszLibNoFile
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bl affichageMess
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100: @ standard end of the program
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mov r0, #0 @ return code
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mov r7, #EXIT @ request to exit program
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svc #0 @ perform the system call
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iAdrszCarriageReturn: .int szCarriageReturn
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iAdrsZoneConv: .int sZoneConv
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iAdrszFileName: .int szFileName
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iAdrszLibNoFile: .int szLibNoFile
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iAdrsBuffer: .int sBuffer
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iBufferSize: .int BUFFERSIZE
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iAdrszMessAnoRead: .int szMessAnoRead
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iAdrszMessAnoTime: .int szMessAnoTime
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iAdrszMessAnoWrite: .int szMessAnoWrite
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iFlag: .int O_RDWR|O_APPEND|O_CREAT
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iAdrstTVal: .int stTVal
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iAdrstTZone: .int stTZone
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iadrszSpace: .int szSpace
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/***************************************************/
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/* formatting time area */
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/***************************************************/
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// r0 contains time area
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// r0 return address result string
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formatTime:
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push {r2-r12,lr} @ save registers
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ldr r1,[r0,#timeval_sec] @ timestemp in second
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ldr r2,iSecJan2020
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sub r0,r1,r2 @ total secondes to 01/01/2020
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mov r1,#60
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bl division
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mov r0,r2
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mov r6,r3 @ compute secondes
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mov r1,#60
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bl division
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mov r7,r3 @ compute minutes
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mov r0,r2
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mov r1,#24
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bl division
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mov r8,r3 @ compute hours
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mov r0,r2
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mov r11,r0
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mov r1,#(365 * 4 + 1)
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bl division
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lsl r9,r2,#2 @ multiply by 4 = year1
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mov r1,#(365 * 4 + 1)
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mov r0,r11
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bl division
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mov r10,r3
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ldr r1,iAdrtbDayMonthYear
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mov r2,#3
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mov r3,#12
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1:
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mul r11,r3,r2
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ldr r12,[r1,r11,lsl #2] @ load days by year
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cmp r10,r12
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bge 2f
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sub r2,r2,#1
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cmp r2,#0
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bne 1b
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2: @ r2 = year2
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mov r5,#11
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mul r4,r3,r2
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lsl r4,#2
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add r4,r1
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3:
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ldr r12,[r4,r5,lsl #2] @ load days by month
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cmp r10,r12
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bge 4f
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subs r5,r5,#1
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bne 3b
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4: @ r5 = month - 1
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mul r11,r3,r2
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add r11,r5
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ldr r1,iAdrtbDayMonthYear
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ldr r3,[r1,r11,lsl #2]
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sub r0,r10,r3
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add r0,r0,#1 @ final compute day
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ldr r1,iAdrsZoneConv
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bl conversion10 @ this function do not zero final
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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ldr r0,iAdrszMessDate
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at first @ character
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mov r3,r0
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add r0,r5,#1 @ final compute month
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ldr r1,iAdrsZoneConv
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bl conversion10
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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mov r0,r3
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at next @ character
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mov r3,r0
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ldr r11,iYearStart
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add r0,r9,r11
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add r0,r0,r2 @ final compute year = 2020 + year1 + year2
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ldr r1,iAdrsZoneConv
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bl conversion10
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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mov r0,r3
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at next @ character
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mov r3,r0
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mov r0,r8 @ hours
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ldr r1,iAdrsZoneConv
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bl conversion10
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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mov r0,r3
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at next @ character
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mov r3,r0
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mov r0,r7 @ minutes
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ldr r1,iAdrsZoneConv
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bl conversion10
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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mov r0,r3
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at next @ character
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mov r3,r0
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mov r0,r6 @ secondes
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ldr r1,iAdrsZoneConv
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bl conversion10
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mov r4,#0 @ store zero final
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strb r4,[r1,r0]
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mov r0,r3
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ldr r1,iAdrsZoneConv
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bl strInsertAtCharInc @ insert result at next @ character
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100:
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pop {r2-r12,pc} @ restaur registers
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iAdrszMessDate: .int szMessDate
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iSecJan2020: .int 1577836800
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iAdrtbDayMonthYear: .int tbDayMonthYear
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iYearStart: .int 2020
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/***************************************************/
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/* ROUTINES INCLUDE */
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/***************************************************/
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.include "../affichage.inc"
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