minix/lib/i386/rts/_ipc.s
2006-03-10 16:16:21 +00:00

79 lines
1.7 KiB
ArmAsm
Executable file

.sect .text; .sect .rom; .sect .data; .sect .bss
.define __echo, __notify, __send, __receive, __sendrec
! See src/kernel/ipc.h for C definitions
SEND = 1
RECEIVE = 2
SENDREC = 3
NOTIFY = 4
ECHO = 8
SYSVEC = 33 ! trap to kernel
SRC_DST = 8 ! source/ destination process
ECHO_MESS = 8 ! echo doesn't have SRC_DST
MESSAGE = 12 ! message pointer
!*========================================================================*
! IPC assembly routines *
!*========================================================================*
! all message passing routines save ebp, but destroy eax and ecx.
.define __echo, __notify, __send, __receive, __sendrec
.sect .text
__send:
push ebp
mov ebp, esp
push ebx
mov eax, SRC_DST(ebp) ! eax = dest-src
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
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
mov ebx, MESSAGE(ebp) ! ebx = message pointer
mov ecx, SENDREC ! _sendrec(srcdest, ptr)
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
__echo:
push ebp
mov ebp, esp
push ebx
mov ebx, ECHO_MESS(ebp) ! ebx = message pointer
mov ecx, ECHO ! _echo(srcdest, ptr)
int SYSVEC ! trap to the kernel
pop ebx
pop ebp
ret