changeset b636411c118e in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=b636411c118e
description:
SE mode: Make the direction anonymous mmaps move through memory
configurable.
diffstat:
2 files changed, 11 insertions(+), 2 deletions(-)
src/kern/operatingsystem.hh | 4 ++++
src/sim/syscall_emul.hh | 9 +++++++--
diffs (34 lines):
diff -r 71b42be12ccd -r b636411c118e src/kern/operatingsystem.hh
--- a/src/kern/operatingsystem.hh Thu Oct 01 09:35:06 2009 -0400
+++ b/src/kern/operatingsystem.hh Fri Oct 02 01:32:00 2009 -0700
@@ -122,6 +122,10 @@
static int openSpecialFile(std::string path, LiveProcess *process,
ThreadContext *tc);
+ static const bool mmapGrowsUp = true;
+
+ static bool mmapGrowsDown() { return false; }
+
}; // class OperatingSystem
diff -r 71b42be12ccd -r b636411c118e src/sim/syscall_emul.hh
--- a/src/sim/syscall_emul.hh Thu Oct 01 09:35:06 2009 -0400
+++ b/src/sim/syscall_emul.hh Fri Oct 02 01:32:00 2009 -0700
@@ -978,9 +978,14 @@
}
// pick next address from our "mmap region"
- start = p->mmap_end;
+ if (OS::mmapGrowsDown()) {
+ start = p->mmap_end - length;
+ p->mmap_end = start;
+ } else {
+ start = p->mmap_end;
+ p->mmap_end += length;
+ }
p->pTable->allocate(start, length);
- p->mmap_end += length;
if (!(flags & OS::TGT_MAP_ANONYMOUS)) {
warn("allowing mmap of file @ fd %d. "
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