106 lines
2.4 KiB
ArmAsm
Executable file
106 lines
2.4 KiB
ArmAsm
Executable file
.sect .text; .sect .rom; .sect .data; .sect .bss
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.define __echo, __send, __nb_send, __receive, __nb_receive, __sendrec, __notify
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! See src/kernel/ipc.h for C definitions
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ECHO = 0
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SEND = 1
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RECEIVE = 2
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SENDREC = 3 + 32 ! flags 0x20 to request fresh answer
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NOTIFY = 4
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NB_SEND = 1 + 16 ! flags 0x10 to prevent blocking
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NB_RECEIVE = 2 + 16 ! flags 0x10 to prevent blocking
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SYSVEC = 33 ! trap to kernel
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SRC_DST = 8 ! source/ destination process
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ECHO_MESS = 8 ! doesn't have SRC_DST
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MESSAGE = 12 ! message pointer
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!*========================================================================*
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! IPC assembly routines *
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!*========================================================================*
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! all message passing routines save ebp, but destroy eax and ecx.
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.define __echo, __send, __nb_send, __receive, __nb_receive, __sendrec, __notify
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.sect .text
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__send:
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push ebp
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mov ebp, esp
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push ebx
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mov eax, SRC_DST(ebp) ! eax = dest-src
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mov ebx, MESSAGE(ebp) ! ebx = message pointer
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mov ecx, SEND ! _send(dest, ptr)
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int SYSVEC ! trap to the kernel
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pop ebx
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pop ebp
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ret
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__nb_send:
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push ebp
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mov ebp, esp
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push ebx
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mov eax, SRC_DST(ebp) ! eax = dest-src
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mov ebx, MESSAGE(ebp) ! ebx = message pointer
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mov ecx, NB_SEND ! _nb_send(dest, ptr)
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int SYSVEC ! trap to the kernel
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pop ebx
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pop ebp
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ret
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__receive:
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push ebp
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mov ebp, esp
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push ebx
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mov eax, SRC_DST(ebp) ! eax = dest-src
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mov ebx, MESSAGE(ebp) ! ebx = message pointer
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mov ecx, RECEIVE ! _receive(src, ptr)
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int SYSVEC ! trap to the kernel
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pop ebx
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pop ebp
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ret
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__nb_receive:
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push ebp
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mov ebp, esp
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push ebx
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mov eax, SRC_DST(ebp) ! eax = dest-src
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mov ebx, MESSAGE(ebp) ! ebx = message pointer
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mov ecx, NB_RECEIVE ! _nb_receive(src, ptr)
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int SYSVEC ! trap to the kernel
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pop ebx
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pop ebp
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ret
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__sendrec:
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push ebp
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mov ebp, esp
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push ebx
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mov eax, SRC_DST(ebp) ! eax = dest-src
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mov ebx, MESSAGE(ebp) ! ebx = message pointer
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mov ecx, SENDREC ! _sendrec(srcdest, ptr)
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int SYSVEC ! trap to the kernel
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pop ebx
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pop ebp
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ret
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__notify:
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push ebp
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mov ebp, esp
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push ebx
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mov eax, SRC_DST(ebp) ! eax = dest-src
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mov ebx, MESSAGE(ebp) ! ebx = message pointer
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mov ecx, NOTIFY ! _notify(srcdest, ptr)
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int SYSVEC ! trap to the kernel
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pop ebx
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pop ebp
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ret
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__echo:
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push ebp
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mov ebp, esp
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push ebx
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mov ebx, ECHO_MESS(ebp) ! ebx = message pointer
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mov ecx, ECHO ! _echo(srcdest, ptr)
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int SYSVEC ! trap to the kernel
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pop ebx
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pop ebp
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ret
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