add support to page on demand (#634)

This patch splites the target-requested memory regions into pages and only
allocates host memory when it is accessed to reduce larget memory sceniaro
in 64 bit target system

Co-authored-by: Dave.Wen <dave.wen@sifive.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/riscv/sim.cc b/riscv/sim.cc
index 5fff0ed..73d2b45 100644
--- a/riscv/sim.cc
+++ b/riscv/sim.cc
@@ -353,7 +353,7 @@ char* sim_t::addr_to_mem(reg_t addr) {
   auto desc = bus.find_device(addr);
   if (auto mem = dynamic_cast<mem_t*>(desc.second))
     if (addr - desc.first < mem->size())
-      return mem->contents() + (addr - desc.first);
+      return mem->contents(addr);
   return NULL;
 }