361a67d749
In sigma0 normally no answer tag to a request/fault is created. It simply uses the message tag received with the request. This doesn't work out when I/O ports are requested. This patch constructs an appropriate answer tag. Moreover, we have to enable I/O port protection in the kernel configuration.
17 lines
557 B
Diff
17 lines
557 B
Diff
Index: l4/pkg/sigma0/server/src/ioports_x86.cc
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===================================================================
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--- l4/pkg/sigma0/server/src/ioports_x86.cc (revision 40)
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+++ l4/pkg/sigma0/server/src/ioports_x86.cc (working copy)
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@@ -39,8 +39,9 @@
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size = l4_fpage_size(fp) + PORT_SHIFT;
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unsigned long i = io_ports.alloc(Region::bs(port, 1UL << size, t));
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- if (i == port)
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+ if (i == port) {
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a->snd_fpage(l4_iofpage(port >> PORT_SHIFT, size - PORT_SHIFT));
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- else
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+ a->tag = l4_msgtag(0, 0, 1, 0);
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+ } else
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a->error(L4_ENOMEM);
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}
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