syscall: Implementation of the ftruncate64 system call.

2 files changed, 21 insertions, 0 deletions

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
@@ -405,6 +405,22 @@ ftruncateFunc(SyscallDesc *desc, int num,
 }
 
 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)
 {
     // Letting the simulated program change the simulator's umask seems like
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);