33 lines
827 B
ArmAsm
33 lines
827 B
ArmAsm
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.define __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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.extern __send, __receive, __sendrec
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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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