.

wcfs/internal/wcfs_virtmem.cpp

@@ -358,7 +358,7 @@ pair<Mapping, error> _FileH::mmap(int64_t blk_start, int64_t blk_len, VMA *vma)
 
 // functions that we give to virtmem bigfile_ops .mmap*
 void* virt_mmap_setup_read(VMA *vma, BigFile *file, blk_t blk, size_t blklen) {
-    FileH fileh; // XXX = ...
+    FileH fileh; // XXX = ... somehow from file
     Mapping mmap;
     error err;
 
@@ -369,7 +369,11 @@ void* virt_mmap_setup_read(VMA *vma, BigFile *file, blk_t blk, size_t blklen) {
     mmap->incref(); // vma->mmap_overlay_server is keeping ref to mmap
     vma->mmap_overlay_server = mmap._ptr();
 
-    panic("TODO");
+    // XXX here? -> in fileh->mmap? don't set at all here?
+    vma->addr_start = mmap->mem_start;
+    vma->addr_stop  = mmap->mem_stop;
+
+    return vma->addr_start;
 }
 
 int virt_remmap_blk_read(VMA *vma, BigFile *file, blk_t blk) {
@@ -389,6 +393,7 @@ void virt_munmap(VMA *vma, BigFile *file) {
     // XXX close mmap->fileh
 }
 
+
 // resync resyncs connection and its mappings onto different database view.
 error _Conn::resync(zodb::Tid at) {
     _Conn& wconn = *this;