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genode/base-foc/patches/foc_caps_equal.patch

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Fiasco.OC: fix l4_task_cap_equal semantic. The syscall l4_task_cap_equal almost returns false although the referenced kernel-objects are equal. This patch changes the semantic of the syscall so that whenever two capabilities refering the same kernel-object are compared it will return true. Please refer to the discussion of the following mail thread: http://www.mail-archive.com/l4-hackers@os.inf.tu-dresden.de/msg05162.html
2012-05-03 09:15:55 +00:00
Index: kernel/fiasco/src/kern/task.cpp
===================================================================
Fiasco.OC: update to recent version (svn rev. 40)
2012-09-05 12:28:37 +00:00
--- kernel/fiasco/src/kern/task.cpp (revision 40)
Fiasco.OC: fix l4_task_cap_equal semantic. The syscall l4_task_cap_equal almost returns false although the referenced kernel-objects are equal. This patch changes the semantic of the syscall so that whenever two capabilities refering the same kernel-object are compared it will return true. Please refer to the discussion of the following mail thread: http://www.mail-archive.com/l4-hackers@os.inf.tu-dresden.de/msg05162.html
2012-05-03 09:15:55 +00:00
+++ kernel/fiasco/src/kern/task.cpp (working copy)
Fiasco.OC: update to recent version (svn rev. 40)
2012-09-05 12:28:37 +00:00
@@ -488,10 +488,12 @@
Fiasco.OC: fix l4_caps_equal kernel patch A kernel capability that is invalid has no kobject pointer, so check whether it's valid beforehand
2012-05-29 08:15:42 +00:00
if (obj_a.special() || obj_b.special())
return commit_result(obj_a.special_cap() == obj_b.special_cap());
Fiasco.OC: update to recent version (svn rev. 40)
2012-09-05 12:28:37 +00:00
- Obj_space::Capability c_a = lookup(obj_a.cap());
- Obj_space::Capability c_b = lookup(obj_b.cap());
+ Kobject_iface* ki_a = lookup(obj_a.cap()).obj();
+ Kobject_iface* ki_b = lookup(obj_b.cap()).obj();
Fiasco.OC: fix l4_caps_equal kernel patch A kernel capability that is invalid has no kobject pointer, so check whether it's valid beforehand
2012-05-29 08:15:42 +00:00
+ Address a_a = ki_a ? ki_a->kobject_start_addr() : 0;
+ Address a_b = ki_b ? ki_b->kobject_start_addr() : 0;
Fiasco.OC: fix l4_task_cap_equal semantic. The syscall l4_task_cap_equal almost returns false although the referenced kernel-objects are equal. This patch changes the semantic of the syscall so that whenever two capabilities refering the same kernel-object are compared it will return true. Please refer to the discussion of the following mail thread: http://www.mail-archive.com/l4-hackers@os.inf.tu-dresden.de/msg05162.html
2012-05-03 09:15:55 +00:00
- return commit_result(c_a == c_b);
Fiasco.OC: fix l4_caps_equal kernel patch A kernel capability that is invalid has no kobject pointer, so check whether it's valid beforehand
2012-05-29 08:15:42 +00:00
+ return commit_result(a_a == a_b);
Fiasco.OC: fix l4_task_cap_equal semantic. The syscall l4_task_cap_equal almost returns false although the referenced kernel-objects are equal. This patch changes the semantic of the syscall so that whenever two capabilities refering the same kernel-object are compared it will return true. Please refer to the discussion of the following mail thread: http://www.mail-archive.com/l4-hackers@os.inf.tu-dresden.de/msg05162.html
2012-05-03 09:15:55 +00:00
}
PRIVATE inline NOEXPORT
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