33 lines
846 B
ArmAsm
33 lines
846 B
ArmAsm
.sect .text; .sect .rom; .sect .data
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.define _send, _receive, _sendrec
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.extern _send, _receive, _sendrec
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! See ../h/com.h for C definitions
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SEND = 1
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RECEIVE = 2
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BOTH = 3
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SYSVEC = 32
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!*========================================================================*
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! send and receive *
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!*========================================================================*
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! send(), receive(), sendrec() all save bp, but destroy ax, bx, and cx.
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_send: mov cx,SEND ! send(dest, ptr)
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jmp L0
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_receive:
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mov cx,RECEIVE ! receive(src, ptr)
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jmp L0
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_sendrec:
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mov cx,BOTH ! sendrec(srcdest, ptr)
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jmp L0
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L0: push bp ! save bp
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mov bp,sp ! can't index off sp
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mov ax,4(bp) ! ax = dest-src
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mov bx,6(bp) ! bx = message pointer
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int SYSVEC ! trap to the kernel
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pop bp ! restore bp
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ret ! return
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