Additions/fixes for Tru64 syscall emulation.

We can now run the SimpleScalar wupwise binary
to completion on the test input.
Didn't have time to do more testing, but I fixed
a major problem w/getdirentries that should help
a lot more programs run.

arch/alpha/alpha_tru64_process.cc:
    Add truncate, ftruncate, statfs, and fstatfs.
    Add v4.x (pre-F64) stat, fstat, and lstat.
    Add setsysinfo (though all it does is provide more
    specific warning messages).
    Fix subtle but major bug in getdirentries.
sim/syscall_emul.cc:
sim/syscall_emul.hh:
    Add truncate, ftruncate, statfs, and fstatfs.

--HG--
extra : convert_revision : 9037393d00dc49b0074a41603ea647587f5a9ec7

1 files changed, 31 insertions, 4 deletions

diff --git a/sim/syscall_emul.cc b/sim/syscall_emul.cc
index 22d62e4d1..13df2b7a2 100644
--- a/sim/syscall_emul.cc
+++ b/sim/syscall_emul.cc
@@ -193,7 +193,7 @@ gethostnameFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
 SyscallReturn
 unlinkFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
 {
-    std::string path;
+    string path;
 
     if (xc->mem->readString(path, xc->getSyscallArg(0)) != No_Fault)
         return (TheISA::IntReg)-EFAULT;
@@ -205,17 +205,44 @@ unlinkFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
 SyscallReturn
 renameFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
 {
-    std::string old_name;
+    string old_name;
 
     if (xc->mem->readString(old_name, xc->getSyscallArg(0)) != No_Fault)
         return -EFAULT;
 
-    std::string new_name;
+    string new_name;
 
     if (xc->mem->readString(new_name, xc->getSyscallArg(1)) != No_Fault)
         return -EFAULT;
 
-    int64_t result = rename(old_name.c_str(),new_name.c_str());
+    int64_t result = rename(old_name.c_str(), new_name.c_str());
     return (result == -1) ? -errno : result;
 }
 
+SyscallReturn
+truncateFunc(SyscallDesc *desc, int num, Process *p, ExecContext *xc)
+{
+    string path;
+
+    if (xc->mem->readString(path, xc->getSyscallArg(0)) != No_Fault)
+        return -EFAULT;
+
+    off_t length = xc->getSyscallArg(1);
+
+    int result = truncate(path.c_str(), length);
+    return (result == -1) ? -errno : result;
+}
+
+SyscallReturn
+ftruncateFunc(SyscallDesc *desc, int num, Process *process, ExecContext *xc)
+{
+    int fd = process->sim_fd(xc->getSyscallArg(0));
+
+    if (fd < 0)
+        return -EBADF;
+
+    off_t length = xc->getSyscallArg(1);
+
+    int result = ftruncate(fd, length);
+    return (result == -1) ? -errno : result;
+}