80 lines
1.7 KiB
ArmAsm
Executable file
80 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
|
|
|