# HG changeset patch
# Parent 5ab4fbb86527e49358ff827b3a9f581349d79faa
syscall_emu: Added getdents and getdents64 syscalls.

diff -r 5ab4fbb86527 -r 7ff9fdfdb108 src/arch/x86/linux/process.cc
--- a/src/arch/x86/linux/process.cc	Tue Jul 12 17:14:13 2016 +0200
+++ b/src/arch/x86/linux/process.cc	Tue Jul 12 17:16:30 2016 +0200
@@ -296,7 +296,7 @@
     /*  75 */ SyscallDesc("fdatasync", unimplementedFunc),
     /*  76 */ SyscallDesc("truncate", truncateFunc),
     /*  77 */ SyscallDesc("ftruncate", ftruncateFunc),
-    /*  78 */ SyscallDesc("getdents", unimplementedFunc),
+    /*  78 */ SyscallDesc("getdents", getdentsFunc),
     /*  79 */ SyscallDesc("getcwd", getcwdFunc),
     /*  80 */ SyscallDesc("chdir", unimplementedFunc),
     /*  81 */ SyscallDesc("fchdir", unimplementedFunc),
@@ -435,7 +435,7 @@
     /* 214 */ SyscallDesc("epoll_ctl_old", unimplementedFunc),
     /* 215 */ SyscallDesc("epoll_wait_old", unimplementedFunc),
     /* 216 */ SyscallDesc("remap_file_pages", unimplementedFunc),
-    /* 217 */ SyscallDesc("getdents64", unimplementedFunc),
+    /* 217 */ SyscallDesc("getdents64", getdents64Func),
     /* 218 */ SyscallDesc("set_tid_address", unimplementedFunc),
     /* 219 */ SyscallDesc("restart_syscall", unimplementedFunc),
     /* 220 */ SyscallDesc("semtimedop", unimplementedFunc),
@@ -682,7 +682,7 @@
     /* 138 */ SyscallDesc("setfsuid", unimplementedFunc),
     /* 139 */ SyscallDesc("setfsgid", unimplementedFunc),
     /* 140 */ SyscallDesc("_llseek", _llseekFunc),
-    /* 141 */ SyscallDesc("getdents", unimplementedFunc),
+    /* 141 */ SyscallDesc("getdents", getdentsFunc),
     /* 142 */ SyscallDesc("_newselect", unimplementedFunc),
     /* 143 */ SyscallDesc("flock", unimplementedFunc),
     /* 144 */ SyscallDesc("msync", unimplementedFunc),
@@ -762,7 +762,7 @@
     /* 218 */ SyscallDesc("mincore", unimplementedFunc),
     /* 219 */ SyscallDesc("madvise", unimplementedFunc),
     /* 220 */ SyscallDesc("madvise1", unimplementedFunc),
-    /* 221 */ SyscallDesc("getdents64", unimplementedFunc),
+    /* 221 */ SyscallDesc("getdents64", getdents64Func),
     /* 222 */ SyscallDesc("fcntl64", unimplementedFunc),
     /* 223 */ SyscallDesc("unused", unimplementedFunc),
     /* 224 */ SyscallDesc("gettid", unimplementedFunc),
diff -r 5ab4fbb86527 -r 7ff9fdfdb108 src/sim/syscall_emul.hh
--- a/src/sim/syscall_emul.hh	Tue Jul 12 17:14:13 2016 +0200
+++ b/src/sim/syscall_emul.hh	Tue Jul 12 17:16:30 2016 +0200
@@ -303,6 +303,14 @@
 SyscallReturn cloneFunc(SyscallDesc *desc, int num,
                                LiveProcess *p, ThreadContext *tc);
 
+/// Target getdents() handler.
+SyscallReturn getdentsFunc(SyscallDesc *desc, int num, 
+                               LiveProcess *p, ThreadContext *tc);
+
+/// Target getdents64() handler.
+SyscallReturn getdents64Func(SyscallDesc *desc, int num, 
+                               LiveProcess *p, ThreadContext *tc);
+
 /// Target access() handler
 SyscallReturn accessFunc(SyscallDesc *desc, int num,
                                LiveProcess *p, ThreadContext *tc);
diff -r 5ab4fbb86527 -r 7ff9fdfdb108 src/sim/syscall_emul.cc
--- a/src/sim/syscall_emul.cc	Tue Jul 12 17:14:13 2016 +0200
+++ b/src/sim/syscall_emul.cc	Tue Jul 12 17:16:30 2016 +0200
@@ -350,6 +350,41 @@
 }
 
 SyscallReturn
+getdentsFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
+{
+    int index = 0;
+    int fd = p->sim_fd(p->getSyscallArg(tc, index));
+    assert(fd >= 0);
+    Addr bufPtr = p->getSyscallArg(tc, index);
+    int nbytes = p->getSyscallArg(tc, index);
+    BufferArg bufArg(bufPtr, nbytes);
+
+    int nread = syscall(SYS_getdents, fd, bufArg.bufferPtr(), nbytes);
+
+    if(nread > 0)
+        bufArg.copyOut(tc->getMemProxy());
+
+    return (nread == -1) ? -errno : nread;
+}
+
+SyscallReturn
+getdents64Func(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
+{
+    int index = 0;
+    int fd = p->sim_fd(p->getSyscallArg(tc, index));
+    Addr bufPtr = p->getSyscallArg(tc, index);
+    int nbytes = p->getSyscallArg(tc, index);
+    BufferArg bufArg(bufPtr, nbytes);
+
+    int nread = syscall(SYS_getdents64, fd, bufArg.bufferPtr(), nbytes);
+
+    if(nread > 0)
+        bufArg.copyOut(tc->getMemProxy());
+
+    return (nread == -1) ? -errno : nread;
+}
+
+SyscallReturn
 getcwdFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
 {
     int result = 0;