76 lines
1.9 KiB
ArmAsm
Executable file
76 lines
1.9 KiB
ArmAsm
Executable file
.sect .text; .sect .rom; .sect .data; .sect .bss
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.define __ipc_request, __ipc_reply, __ipc_notify, __ipc_receive
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! See src/kernel/ipc.h for C definitions.
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IPC_REQUEST = 16 ! each gets a distinct bit
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IPC_REPLY = 32
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IPC_NOTIFY = 64
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IPC_RECEIVE = 128
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SYSVEC = 33 ! trap to kernel
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! Offsets of arguments relative to stack pointer.
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SRC_DST = 8 ! source/ destination process
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SEND_MSG = 12 ! message pointer for sending
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EVENT_SET = 12 ! notification event set
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RECV_MSG = 16 ! message pointer for receiving
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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, ecx, and edx.
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.define __ipc_request, __ipc_reply, __ipc_notify, __ipc_receive
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.sect .text
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__ipc_request:
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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 = destination
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mov ebx, SEND_MSG(ebp) ! ebx = message pointer
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mov ecx, IPC_REQUEST ! _ipc_request(dst, 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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__ipc_reply:
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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 = destination
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mov ebx, SEND_MSG(ebp) ! ebx = message pointer
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mov ecx, IPC_REPLY ! _ipc_reply(dst, 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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__ipc_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 = source
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mov edx, EVENT_SET(ebp) ! ebx = event set
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mov ebx, RCV_MSG(ebp) ! ebx = message pointer
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mov ecx, IPC_RECEIVE ! _ipc_receive(src, events, 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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__ipc_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) ! ebx = destination
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mov edx, EVENT_SET(ebp) ! edx = event set
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mov ecx, IPC_NOTIFY ! _ipc_notify(dst, events)
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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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