289 lines
9.6 KiB
Text
289 lines
9.6 KiB
Text
/* ARM assembly AARCH64 Raspberry PI 3B */
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/* program notes64.s */
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/************************************/
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/* Constantes */
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/************************************/
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.include "../includeConstantesARM64.inc"
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.equ BUFFERSIZE, 10000
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.equ O_APPEND, 0x400
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.equ GETTIME, 0xa9 // 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 + 8
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timeval_usec: //
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.struct timeval_usec + 8
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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 + 8
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timezone_dsttime: //
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.struct timezone_dsttime + 8
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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 8
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tbDayMonthYear: .quad 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335
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.quad 366, 397, 425, 456, 486, 517, 547, 578, 609, 639, 670, 700
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.quad 731, 762, 790, 821, 851, 882, 912, 943, 974,1004,1035,1065
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.quad 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 x20,[fp] // load number of parameters command line
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cmp x20,#1 // >1 insertion text
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bgt 10f
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mov x0,AT_FDCWD
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ldr x1,qAdrszFileName // file name
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mov x2,#O_RDONLY // flags
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mov x3,#0 // mode in octal
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mov x8,#OPEN // open file, create if not exist
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svc 0
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cmp x0,#0 // error open
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ble 99f // file no exists ?
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mov x19,x0 // save FD and if file exist display text
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ldr x1,qAdrsBuffer // buffer address
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ldr x2,#iBufferSize // buffersize
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mov x8,READ
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svc 0
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cmp x0,#0 // error read ?
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blt 98f
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ldr x0,qAdrsBuffer // 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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mov x0,AT_FDCWD
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ldr x1,qAdrszFileName // file name
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ldr x2,iFlag // flags
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mov x3,#0644 // mode in octal
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mov x8,#OPEN // open file, create if not exist
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svc 0
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cmp x0,#0 // error open
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ble 96f
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mov x19,x0 // save FD
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ldr x0,qAdrstTVal
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ldr x1,qAdrstTZone
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mov x8,#GETTIME // call system function time
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svc 0
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cmp x0,#-1 // error ?
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beq 97f
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ldr x1,qAdrstTVal
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ldr x0,[x1,timeval_sec] // timestamp in second
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bl formatTime // format date and hour
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mov x1,x0
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mov x2,#0
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11: // compute length of time message
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ldrb w3,[x1,x2]
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cmp w3,#0
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beq 12f
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add x2,x2,#1
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b 11b
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12:
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mov x0,x19 // write time message
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mov x8,#WRITE
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svc 0
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cmp x0,#0 // error ?
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ble 96f
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mov x5,#2 // start parameters command line
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13:
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mov x0,x19 // file FD
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ldr x1,[fp,x5,lsl #3] // load parameter address
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mov x2,#0
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14: // compute parameter length
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ldrb w3,[x1,x2]
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cmp w3,#0
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beq 15f
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add x2,x2,#1
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b 14b
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15: // write parameter
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mov x8,#WRITE
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svc 0
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cmp x0,#0 // error ?
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ble 96f
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mov x0,x19 // file FD
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ldr x1,iadrszSpace // write a space betwin parameters
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mov x2,#1
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mov x8,#WRITE
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svc 0
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add x5,x5,#1 // increment indixe
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cmp x5,x20 // parameters maxi ?
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ble 13b // no -> loop
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mov x0,x19
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ldr x1,qAdrszCarriageReturn // write line end
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mov x2,#1
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mov x7,#WRITE
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svc 0
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50: // close the file
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mov x0,x19
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mov x8,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 x0,qAdrszMessAnoWrite
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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 x0,qAdrszMessAnoTime
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bl affichageMess
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b 100f
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98: // error read
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ldr x0,qAdrszMessAnoRead
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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 x0,qAdrszLibNoFile
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bl affichageMess
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100: // standard end of the program
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mov x0, #0 // return code
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mov x8,EXIT
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svc #0 // perform the system call
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qAdrszCarriageReturn: .quad szCarriageReturn
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qAdrsZoneConv: .quad sZoneConv
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qAdrszFileName: .quad szFileName
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qAdrszLibNoFile: .quad szLibNoFile
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qAdrsBuffer: .quad sBuffer
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iBufferSize: .quad BUFFERSIZE
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qAdrszMessAnoRead: .quad szMessAnoRead
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qAdrszMessAnoTime: .quad szMessAnoTime
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qAdrszMessAnoWrite: .quad szMessAnoWrite
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iFlag: .quad O_RDWR|O_APPEND|O_CREAT
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qAdrstTVal: .quad stTVal
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qAdrstTZone: .quad stTZone
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iadrszSpace: .quad szSpace
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/***************************************************/
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/* formatting time area */
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/***************************************************/
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// x0 contains time area
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// x0 return address result string
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formatTime:
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stp x2,lr,[sp,-16]! // save registers
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ldr x2,qSecJan2020
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sub x3,x0,x2 // total secondes to 01/01/2020
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mov x4,60
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udiv x5,x3,x4
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msub x6,x5,x4,x3 // compute secondes
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udiv x3,x5,x4
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msub x7,x3,x4,x5 // compute minutes
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mov x4,24
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udiv x5,x3,x4
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msub x8,x5,x4,x3 // compute hours
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mov x4,(365 * 4 + 1)
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udiv x9,x5,x4
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lsl x9,x9,2 // multiply by 4 = year1
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udiv x12,x5,x4
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msub x10,x12,x4,x5
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ldr x11,qAdrtbDayMonthYear
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mov x12,3
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mov x13,12
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1:
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mul x14,x13,x12
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ldr x15,[x11,x14,lsl 3] // load days by year
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cmp x10,x15
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bge 2f
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sub x12,x12,1
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cmp x12,0
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cbnz x12,1b
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2: // x12 = year2
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mov x16,11
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mul x15,x13,x12
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lsl x15,x15,3 // * par 8
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add x14,x15,x11
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3:
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ldr x15,[x14,x16,lsl 3] // load days by month
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cmp x10,x15
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bge 4f
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sub x16,x16,1
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cmp x16,0
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cbnz x16,3b
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4: // x16 = month - 1
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mul x15,x13,x12
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add x15,x15,x16
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ldr x1,qAdrtbDayMonthYear
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ldr x3,[x1,x15,lsl 3]
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sub x0,x10,x3
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add x0,x0,1 // final compute day
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ldr x1,qAdrsZoneConv
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bl conversion10
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ldr x0,qAdrszMessDate
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ldr x1,qAdrsZoneConv
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bl strInsertAtCharInc // insert result at first @ character
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mov x2,x0
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add x0,x16,1 // final compute month
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ldr x1,qAdrsZoneConv
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bl conversion10
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mov x0,x2
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ldr x1,qAdrsZoneConv
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bl strInsertAtCharInc // insert result at next @ character
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mov x2,x0
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add x0,x9,2020
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add x0,x0,x12 // final compute year = 2020 + year1 + year2
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ldr x1,qAdrsZoneConv
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bl conversion10
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mov x0,x2
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ldr x1,qAdrsZoneConv
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bl strInsertAtCharInc // insert result at next @ character
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mov x2,x0
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mov x0,x8 // hours
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ldr x1,qAdrsZoneConv
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bl conversion10
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mov x0,x2
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ldr x1,qAdrsZoneConv
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bl strInsertAtCharInc // insert result at next @ character
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mov x2,x0
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mov x0,x7 // minutes
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ldr x1,qAdrsZoneConv
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bl conversion10
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mov x0,x2
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ldr x1,qAdrsZoneConv
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bl strInsertAtCharInc // insert result at next @ character
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mov x2,x0
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mov x0,x6 // secondes
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ldr x1,qAdrsZoneConv
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bl conversion10
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mov x4,#0 // store zero final
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strb w4,[x1,x0]
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mov x0,x2
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ldr x1,qAdrsZoneConv
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bl strInsertAtCharInc // insert result at next // character
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100:
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ldp x2,lr,[sp],16 // restaur registers
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ret
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qAdrszMessDate: .quad szMessDate
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qSecJan2020: .quad 1577836800
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qAdrtbDayMonthYear: .quad tbDayMonthYear
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/***************************************************/
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/* ROUTINES INCLUDE */
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/***************************************************/
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.include "../includeARM64.inc"
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