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| Rev 57 |
Rev 1765 |
.macro FUNC_START name
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.macro FUNC_START name
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.text
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.text
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.globl \name
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.globl \name
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.globl _\name
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.globl _\name
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\name:
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\name:
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_\name:
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_\name:
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.endm
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.endm
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FUNC_START _sbrk
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FUNC_START _sbrk
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mov r4, r2 // save increment
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mov r4, r2 // save increment
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lrw r3, brkval
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lrw r3, brkval
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ldw r2, (r3) // get next spot
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ldw r2, (r3) // get next spot
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movi r5, 7
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movi r5, 7
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addi r2, 7 // round up to 8 bytes
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addi r2, 7 // round up to 8 bytes
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andn r2, r5
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andn r2, r5
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addu r4, r2 // save updated pointer
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addu r4, r2 // save updated pointer
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stw r4, (r3)
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stw r4, (r3)
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jmp r15
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jmp r15
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// brk() could go in here too...
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// brk() could go in here too...
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.data
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.data
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.import _end
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.import _end
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brkval: .long _end
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brkval: .long _end
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FUNC_START _exit
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FUNC_START _exit
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mov r1, r1 // accomodate simulator glitch...
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mov r1, r1 // accomodate simulator glitch...
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.short 0x5000
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.short 0x5000
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br _exit // hard loop here
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br _exit // hard loop here
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// 0x5001 - printf
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// 0x5001 - printf
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// 0x5002 - scanf
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// 0x5002 - scanf
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FUNC_START utime
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FUNC_START utime
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.short 0x5003
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.short 0x5003
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jmp r15
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jmp r15
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.macro stub name value
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.macro stub name value
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FUNC_START \name
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FUNC_START \name
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movi r1, \value
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movi r1, \value
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.short 0x50FF
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.short 0x50FF
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jmp r15
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jmp r15
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.endm
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.endm
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stub _close 6
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stub _close 6
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stub _lseek 19
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stub _lseek 19
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stub _open 5
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stub _open 5
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stub _read 3
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stub _read 3
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stub _times 43
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stub _times 43
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stub _unlink 10
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stub _unlink 10
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stub _write 4
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stub _write 4
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//stub access 33
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//stub access 33
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//stub creat 8
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//stub creat 8
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//stub link 9
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//stub link 9
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//stub time 13
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//stub time 13
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//stub profil 98 // movi r6, 2
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//stub profil 98 // movi r6, 2
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//stub lprofil 98 // movi r6, 4
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//stub lprofil 98 // movi r6, 4
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