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[polintos/scott/priv.git] / kernel / mem / addrspace.cc

diff --git a/kernel/mem/addrspace.cc b/kernel/mem/addrspace.cc
index b9bd07af82f54c2c92e483fbda899aa7eb58d83f..397f6a6cba04947c737b1d499b4c9cdec5e504df 100644 (file)
--- a/kernel/mem/addrspace.cc
+++ b/kernel/mem/addrspace.cc
@@ -14,18 +14,10 @@
 // the Software without restriction, including without limitation the rights to
 // use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 // of the Software, and to permit persons to whom the Software is furnished to do
-// so, subject to the following conditions:
+// so, subject to the following condition:
 // 
-//     * Redistributions of source code must retain the above copyright notice,
-//       this list of conditions and the following disclaimers.
-// 
-//     * Redistributions in binary form must reproduce the above copyright notice,
-//       this list of conditions and the following disclaimers in the
-//       documentation and/or other materials provided with the distribution.
-// 
-//     * The names of the Software's authors and/or contributors
-//       may not be used to endorse or promote products derived from
-//       this Software without specific prior written permission.
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
 // 
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
@@ -46,7 +38,7 @@ extern int roshared_start, roshared_page_end;
 extern int rwshared_start, rwshared_page_end;
 
 namespace Mem {
-       extern IMappable physmem;
+       extern IMappable physmem, anonmem;
 
        class AddrSpaceFactory {
        public:
@@ -86,8 +78,7 @@ namespace Mem {
                        mf.access_IDLNS_Read = 1;
                        mf.access_IDLNS_Exec = 1;
                        
-                       as->map(physmem, region, &vstart, mf,
-                               true, AddrSpace::map_protected);
+                       as->map(physmem, region, &vstart, mf, AddrSpace::map_protected);
                        
                        region.start = kvirt_to_phys(&rwshared_start);
                        region.end = kvirt_to_phys(&rwshared_page_end);
@@ -96,12 +87,14 @@ namespace Mem {
                        mf.access_IDLNS_Write = 1;
                        mf.CopyOnWrite = 1;
                        
-                       as->map(physmem, region, &vstart, mf,
-                               true, AddrSpace::map_protected);
+                       as->map(physmem, region, &vstart, mf, AddrSpace::map_protected);
                        
-                       AllocFlags af = 0;
-                       vstart = Arch::stack_bottom;
-                       as->alloc_and_map(Arch::stack_top - vstart + 1, &vstart, af, mf);
+                       // Leave the stack no-exec by default.
+                       region.start = vstart = Arch::stack_bottom;
+                       region.end = Arch::stack_top;
+                       mf.CopyOnWrite = 0;
+                       printf("vstart %llx\n", vstart);
+                       as->map(anonmem, region, &vstart, mf);
                        
                        *obj = static_cast<IAddrSpace>(*(as));
                }
@@ -154,12 +147,6 @@ namespace Mem {
                *addrspace = NULL;
        }
        
-       void AddrSpace::alloc_and_map(u64 len, u64 *vstart,
-                                     AllocFlags aflags, MapFlags mflags)
-       {
-               // FIXME: implement
-       }
-       
        bool AddrSpace::handle_fault(ulong vaddr, bool write, bool exec, bool user)
        {
                if (lock.held_by_curthread())
@@ -542,6 +529,7 @@ namespace Mem {
                        // gets its copy-on-write broken.
 
                        assert((oldflags & reqflags) == reqflags);
+                       assert(!va->flags.FaultOnWrite || oldphys == phys);
                        return true;
                }
 
@@ -580,7 +568,7 @@ namespace Mem {
        }
        
        void AddrSpace::map(IMappable ma, Region region, u64 *vstart,
-                           MapFlags mflags, bool from_kernel, int map_type)
+                           MapFlags mflags, int map_type)
        {
                // FIXME: check alignment for VIPT caches
                // FIXME: Implement the "Replace" map flag
@@ -614,7 +602,7 @@ namespace Mem {
                
                if (*vstart != System::Mem::AddrSpace_ns::unspecified_start) {
                        vregion.start = *vstart;
-                       vregion.end = vregion.start + region.end - region.start + 1;
+                       vregion.end = vregion.start + region.end - region.start;
                
                        if (is_process) {
                                if (!valid_addr(vregion.start))
@@ -631,7 +619,7 @@ namespace Mem {
                }
                
                if (*vstart == System::Mem::AddrSpace_ns::unspecified_start) {
-                       if (fixed) 
+                       if (fixed)
                                throw_idl(ResourceBusy, 2, countarray("varea overlap"));
                        
                        if (!get_free_region(region.end - region.start + 1, vregion, prev))