minix/lib/i386/rts/_ipc.s

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.sect .text; .sect .rom; .sect .data; .sect .bss
.define __notify, __send, __senda, __sendnb, __receive, __sendrec
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! See src/kernel/ipc.h for C definitions
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SEND = 1
RECEIVE = 2
SENDREC = 3
NOTIFY = 4
SENDNB = 5
SENDA = 16
SYSVEC = 33 ! trap to kernel
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SRC_DST = 8 ! source/ destination process
MSGTAB = 8 ! message table
MESSAGE = 12 ! message pointer
TABCOUNT = 12 ! number of entries in message table
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!*========================================================================*
! IPC assembly routines *
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!*========================================================================*
! all message passing routines save ebp, but destroy eax and ecx.
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.sect .text
__send:
push ebp
mov ebp, esp
push ebx
mov eax, SRC_DST(ebp) ! eax = dest-src
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mov ebx, MESSAGE(ebp) ! ebx = message pointer
mov ecx, SEND ! _send(dest, ptr)
int SYSVEC ! trap to the kernel
pop ebx
pop ebp
ret
__receive:
push ebp
mov ebp, esp
push ebx
mov eax, SRC_DST(ebp) ! eax = dest-src
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mov ebx, MESSAGE(ebp) ! ebx = message pointer
mov ecx, RECEIVE ! _receive(src, ptr)
int SYSVEC ! trap to the kernel
pop ebx
pop ebp
ret
__sendrec:
push ebp
mov ebp, esp
push ebx
mov eax, SRC_DST(ebp) ! eax = dest-src
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mov ebx, MESSAGE(ebp) ! ebx = message pointer
mov ecx, SENDREC ! _sendrec(srcdest, ptr)
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int SYSVEC ! trap to the kernel
pop ebx
pop ebp
ret
__notify:
push ebp
mov ebp, esp
push ebx
mov eax, SRC_DST(ebp) ! ebx = destination
mov ecx, NOTIFY ! _notify(srcdst)
int SYSVEC ! trap to the kernel
pop ebx
pop ebp
ret
__sendnb:
push ebp
mov ebp, esp
push ebx
mov eax, SRC_DST(ebp) ! eax = dest-src
mov ebx, MESSAGE(ebp) ! ebx = message pointer
mov ecx, SENDNB ! _sendnb(dest, ptr)
int SYSVEC ! trap to the kernel
pop ebx
pop ebp
ret
__senda:
push ebp
mov ebp, esp
push ebx
mov eax, TABCOUNT(ebp) ! eax = count
mov ebx, MSGTAB(ebp) ! ebx = table
mov ecx, SENDA ! _senda(table, count)
int SYSVEC ! trap to the kernel
pop ebx
pop ebp
ret