From c32d919bc07d87e5fc59d98cb58e9143182c1aef Mon Sep 17 00:00:00 2001
From: "Timothy M. Jones" <tjones1@inf.ed.ac.uk>
Date: Sat, 24 Oct 2009 10:53:58 -0700
Subject: syscall: Implementation of the ftruncate64 system call.

---
 src/sim/syscall_emul.cc | 16 ++++++++++++++++
 src/sim/syscall_emul.hh |  5 +++++
 2 files changed, 21 insertions(+)

(limited to 'src')

diff --git a/src/sim/syscall_emul.cc b/src/sim/syscall_emul.cc
index bd66594af..9a797bcdb 100644
--- a/src/sim/syscall_emul.cc
+++ b/src/sim/syscall_emul.cc
@@ -404,6 +404,22 @@ ftruncateFunc(SyscallDesc *desc, int num,
     return (result == -1) ? -errno : result;
 }
 
+SyscallReturn
+ftruncate64Func(SyscallDesc *desc, int num,
+                LiveProcess *process, ThreadContext *tc)
+{
+    int fd = process->sim_fd(process->getSyscallArg(tc, 0));
+
+    if (fd < 0)
+        return -EBADF;
+
+    // I'm not sure why, but the length argument is in arg reg 3
+    loff_t length = process->getSyscallArg(tc, 3);
+
+    int result = ftruncate64(fd, length);
+    return (result == -1) ? -errno : result;
+}
+
 SyscallReturn
 umaskFunc(SyscallDesc *desc, int num, LiveProcess *process, ThreadContext *tc)
 {
diff --git a/src/sim/syscall_emul.hh b/src/sim/syscall_emul.hh
index 6937e35f0..f5e8a02e5 100644
--- a/src/sim/syscall_emul.hh
+++ b/src/sim/syscall_emul.hh
@@ -260,6 +260,11 @@ SyscallReturn ftruncateFunc(SyscallDesc *desc, int num,
                             LiveProcess *p, ThreadContext *tc);
 
 
+/// Target ftruncate64() handler.
+SyscallReturn ftruncate64Func(SyscallDesc *desc, int num,
+                              LiveProcess *p, ThreadContext *tc);
+
+
 /// Target umask() handler.
 SyscallReturn umaskFunc(SyscallDesc *desc, int num,
                         LiveProcess *p, ThreadContext *tc);
-- 
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