8108c811ed
Using the bitfield generator to treat guards and badges as a union type can be convenient, but it requires reserving a bit in the data for the bitfield run time type information. This type information is not needed by the kernel as it knows implicitly whether the passed data is a badge or a guard based on the kind of cap being operated on. However, with the type information present we cannot pass a word sized piece of data to the kernel. The solution here is to go back to using a plain seL4_Word as the type for invocations that want a capdata and let the user either construct a badge as a plain word, or use the seL4_CNode_CapData bitfield for constructing a guard, although they have to manually extract the word representation out of it.
88 lines
2 KiB
C
88 lines
2 KiB
C
/*
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* Copyright 2017, Data61
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* Commonwealth Scientific and Industrial Research Organisation (CSIRO)
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* ABN 41 687 119 230.
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*
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* This software may be distributed and modified according to the terms of
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* the BSD 2-Clause license. Note that NO WARRANTY is provided.
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* See "LICENSE_BSD2.txt" for details.
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*
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* @TAG(DATA61_BSD)
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*/
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#ifndef __LIBSEL4_ARCH_FUNCTIONS_H
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#define __LIBSEL4_ARCH_FUNCTIONS_H
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#include <autoconf.h>
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#include <sel4/types.h>
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#include <sel4/sel4_arch/functions.h>
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LIBSEL4_INLINE_FUNC seL4_Word
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seL4_GetMR(int i)
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{
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return seL4_GetIPCBuffer()->msg[i];
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}
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LIBSEL4_INLINE_FUNC void
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seL4_SetMR(int i, seL4_Word mr)
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{
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seL4_GetIPCBuffer()->msg[i] = mr;
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}
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LIBSEL4_INLINE_FUNC seL4_Word
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seL4_GetUserData(void)
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{
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return seL4_GetIPCBuffer()->userData;
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}
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LIBSEL4_INLINE_FUNC void
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seL4_SetUserData(seL4_Word data)
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{
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seL4_GetIPCBuffer()->userData = data;
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}
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LIBSEL4_INLINE_FUNC seL4_Word
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seL4_GetBadge(int i)
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{
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return seL4_GetIPCBuffer()->caps_or_badges[i];
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}
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LIBSEL4_INLINE_FUNC seL4_CPtr
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seL4_GetCap(int i)
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{
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return (seL4_CPtr)seL4_GetIPCBuffer()->caps_or_badges[i];
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}
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LIBSEL4_INLINE_FUNC void
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seL4_SetCap(int i, seL4_CPtr cptr)
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{
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seL4_GetIPCBuffer()->caps_or_badges[i] = (seL4_Word)cptr;
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}
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LIBSEL4_INLINE_FUNC void
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seL4_GetCapReceivePath(seL4_CPtr* receiveCNode, seL4_CPtr* receiveIndex, seL4_Word* receiveDepth)
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{
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seL4_IPCBuffer* ipcbuffer = seL4_GetIPCBuffer();
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if (receiveCNode != (void*)0) {
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*receiveCNode = ipcbuffer->receiveCNode;
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}
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if (receiveIndex != (void*)0) {
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*receiveIndex = ipcbuffer->receiveIndex;
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}
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if (receiveDepth != (void*)0) {
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*receiveDepth = ipcbuffer->receiveDepth;
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}
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}
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LIBSEL4_INLINE_FUNC void
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seL4_SetCapReceivePath(seL4_CPtr receiveCNode, seL4_CPtr receiveIndex, seL4_Word receiveDepth)
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{
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seL4_IPCBuffer* ipcbuffer = seL4_GetIPCBuffer();
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ipcbuffer->receiveCNode = receiveCNode;
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ipcbuffer->receiveIndex = receiveIndex;
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ipcbuffer->receiveDepth = receiveDepth;
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}
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#endif
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