commit 3d5e580f28debcbf8776bfd40e4270a4eab572bf
author Robert O'Callahan <robert@ocallahan.org> Sat Dec 06 20:38:56 2014 -0600
committer Robert O'Callahan <robert@ocallahan.org> Sat Dec 06 21:38:13 2014 -0600
tree 559516f22a93c36d18d487f5380d2b6df58dc3af
parent 4e55a9d6adb043fca20aff480f9b4c679db4474f

Create AutoRemoteSyscalls::mmap_syscall helper

src/AutoRemoteSyscalls.cc

diff --git a/src/AutoRemoteSyscalls.cc b/src/AutoRemoteSyscalls.cc
index 07fd9c9..182cdf4 100644
--- a/src/AutoRemoteSyscalls.cc
+++ b/src/AutoRemoteSyscalls.cc
@@ -348,3 +348,17 @@
 ScopedFd AutoRemoteSyscalls::retrieve_fd(int fd) {
   RR_ARCH_FUNCTION(retrieve_fd_arch, arch(), fd);
 }
+
+remote_ptr<void> AutoRemoteSyscalls::mmap_syscall(remote_ptr<void> addr,
+                                                  size_t length, int prot,
+                                                  int flags, int child_fd,
+                                                  uint64_t offset_pages) {
+  if (has_mmap2_syscall(arch())) {
+    syscall(syscall_number_for_mmap2(arch()), addr, length, prot, flags,
+            child_fd, (off_t)offset_pages);
+  } else {
+    syscall(syscall_number_for_mmap(arch()), addr, length, prot, flags, child_fd,
+            offset_pages * page_size());
+  }
+  return t->regs().syscall_result();
+}