85 lines
1.8 KiB
ArmAsm
85 lines
1.8 KiB
ArmAsm
.sect .text; .sect .rom; .sect .data; .sect .bss
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.define __notify, __send, __senda, __sendnb, __receive, __sendrec, __do_kernel_call
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! See src/kernel/ipc.h for C definitions
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SEND = 1
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RECEIVE = 2
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SENDREC = 3
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NOTIFY = 4
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SENDNB = 5
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IPCVEC = 33 ! ipc trap to kernel
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KERVEC = 32 ! syscall trap to kernel
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SRC_DST = 8 ! source/ destination process
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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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.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 IPCVEC ! 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 IPCVEC ! 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 IPCVEC ! 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 = destination
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mov ecx, NOTIFY ! _notify(srcdst)
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int IPCVEC ! 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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__sendnb:
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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, SENDNB ! _sendnb(dest, ptr)
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int IPCVEC ! 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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__do_kernel_call:
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! pass the message pointer to kernel in the %eax register
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mov eax, 4(esp)
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int KERVEC
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ret
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