84 lines
2 KiB
ArmAsm
84 lines
2 KiB
ArmAsm
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.globl __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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.text
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__send:
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push %ebp
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movl %esp, %ebp
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push %ebx
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movl SRC_DST(%ebp), %eax /* eax = dest-src */
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movl MESSAGE(%ebp), %ebx /* ebx = message pointer */
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movl $SEND, %ecx /* _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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movl %esp, %ebp
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push %ebx
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movl SRC_DST(%ebp), %eax /* eax = dest-src */
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movl MESSAGE(%ebp), %ebx /* ebx = message pointer */
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movl $RECEIVE, %ecx /* _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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movl %esp, %ebp
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push %ebx
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movl SRC_DST(%ebp), %eax /* eax = dest-src */
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movl MESSAGE(%ebp), %ebx /* ebx = message pointer */
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movl $SENDREC, %ecx /* _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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movl %esp, %ebp
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push %ebx
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movl SRC_DST(%ebp), %eax /* eax = destination */
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movl $NOTIFY, %ecx /* _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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movl %esp, %ebp
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push %ebx
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movl SRC_DST(%ebp), %eax /* eax = dest-src */
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movl MESSAGE(%ebp), %ebx /* ebx = message pointer */
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movl $SENDNB, %ecx /* _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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movl 4(%esp), %eax
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int $KERVEC
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ret
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