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authorAli Saidi <saidi@eecs.umich.edu>2005-02-23 11:45:25 -0500
committerAli Saidi <saidi@eecs.umich.edu>2005-02-23 11:45:25 -0500
commit9ebeb9b2de34673fffce06baf1420f85993ba806 (patch)
tree00803bde8781393696f513c2f940a2d3b2ae8f43
parent2298e2ba481d6cdba020a405bd878fe4f554b658 (diff)
downloadgem5-9ebeb9b2de34673fffce06baf1420f85993ba806.tar.xz
Added mmap start and end so detailed CPU can know if an access is
in a mmaped region --HG-- extra : convert_revision : e4ee0520c84d94a0d2e804d02035228766abe71f
-rw-r--r--sim/process.cc2
-rw-r--r--sim/process.hh6
-rw-r--r--sim/syscall_emul.hh4
3 files changed, 7 insertions, 5 deletions
diff --git a/sim/process.cc b/sim/process.cc
index c725d3b1c..f09452c42 100644
--- a/sim/process.cc
+++ b/sim/process.cc
@@ -282,7 +282,7 @@ LiveProcess::LiveProcess(const string &name, ObjectFile *objFile,
// Set up region for mmaps. Tru64 seems to start just above 0 and
// grow up from there.
- mmap_base = 0x10000;
+ mmap_start = mmap_end = 0x10000;
// Set pointer for next thread stack. Reserve 8M for main stack.
next_thread_stack_base = stack_base - (8 * 1024 * 1024);
diff --git a/sim/process.hh b/sim/process.hh
index bb4829875..6c7bc4222 100644
--- a/sim/process.hh
+++ b/sim/process.hh
@@ -93,7 +93,8 @@ class Process : public SimObject
Addr next_thread_stack_base;
// Base of region for mmaps (when user doesn't specify an address).
- Addr mmap_base;
+ Addr mmap_start;
+ Addr mmap_end;
std::string prog_fname; // file name
Addr prog_entry; // entry point (initial PC)
@@ -156,7 +157,8 @@ class Process : public SimObject
{
return ((data_base <= addr && addr < brk_point) ||
((stack_base - 16*1024*1024) <= addr && addr < stack_base) ||
- (text_base <= addr && addr < (text_base + text_size)));
+ (text_base <= addr && addr < (text_base + text_size)) ||
+ (mmap_start <= addr && addr < mmap_end));
}
virtual void syscall(ExecContext *xc) = 0;
diff --git a/sim/syscall_emul.hh b/sim/syscall_emul.hh
index 768bc3700..831708a21 100644
--- a/sim/syscall_emul.hh
+++ b/sim/syscall_emul.hh
@@ -410,8 +410,8 @@ mmapFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
if (start == 0) {
// user didn't give an address... pick one from our "mmap region"
- start = p->mmap_base;
- p->mmap_base += RoundUp<Addr>(length, VMPageSize);
+ start = p->mmap_end;
+ p->mmap_end += RoundUp<Addr>(length, VMPageSize);
}
if (!(flags & OS::TGT_MAP_ANONYMOUS)) {