80 lines
2 KiB
ArmAsm
80 lines
2 KiB
ArmAsm
#include <minix/ipcconst.h>
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#include <machine/asm.h>
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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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STATUS = 16 /* status 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 ebx, but destroy eax and ecx. */
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ENTRY(_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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ENTRY(_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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movl STATUS(%ebp), %ecx /* ecx = status pointer */
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movl %ebx, (%ecx)
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pop %ebx
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pop %ebp
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ret
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ENTRY(_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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ENTRY(_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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ENTRY(_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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ENTRY(_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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