From f3a438e58d836ec283af6eef8bb34b57958303d6 Mon Sep 17 00:00:00 2001
From: Javier Setoain <javier.setoain@arm.com>
Date: Wed, 9 Jan 2019 14:24:31 +0000
Subject: sim-se, arch-arm: Add support for getdents64

Change-Id: Ib27950144d4c9802ffb842db98aec9e433ccbfc5
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Cc: Giacomo Travaglini <giacomo.travaglini@arm.com>
Cc: Javier Setoain <javier.setoain@arm.com>
Cc: Brandon Potter <Brandon.Potter@amd.com>
Reviewed-on: https://gem5-review.googlesource.com/c/15438
Maintainer: Brandon Potter <Brandon.Potter@amd.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
---
 src/sim/syscall_emul.cc | 48 ++++++++++++++++++++++++++++++++++++------------
 1 file changed, 36 insertions(+), 12 deletions(-)

(limited to 'src/sim/syscall_emul.cc')

diff --git a/src/sim/syscall_emul.cc b/src/sim/syscall_emul.cc
index 3d17b5d75..e79e79c62 100644
--- a/src/sim/syscall_emul.cc
+++ b/src/sim/syscall_emul.cc
@@ -1151,9 +1151,10 @@ rmdirFunc(SyscallDesc *desc, int num, Process *p, ThreadContext *tc)
     return (result == -1) ? -errno : result;
 }
 
-#if defined(SYS_getdents)
-SyscallReturn
-getdentsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc)
+#if defined(SYS_getdents) || defined(SYS_getdents64)
+template<typename DE, int SYS_NUM>
+static SyscallReturn
+getdentsImpl(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc)
 {
     int index = 0;
     int tgt_fd = p->getSyscallArg(tc, index);
@@ -1166,21 +1167,14 @@ getdentsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc)
     int sim_fd = hbfdp->getSimFD();
 
     BufferArg buf_arg(buf_ptr, count);
-    auto status = syscall(SYS_getdents, sim_fd, buf_arg.bufferPtr(), count);
+    auto status = syscall(SYS_NUM, sim_fd, buf_arg.bufferPtr(), count);
 
     if (status == -1)
         return -errno;
 
-    typedef struct linux_dirent {
-        unsigned long d_ino;
-        unsigned long d_off;
-        unsigned short d_reclen;
-        char dname[];
-    } LinDent;
-
     unsigned traversed = 0;
     while (traversed < status) {
-        LinDent *buffer = (LinDent*)((Addr)buf_arg.bufferPtr() + traversed);
+        DE *buffer = (DE*)((Addr)buf_arg.bufferPtr() + traversed);
 
         auto host_reclen = buffer->d_reclen;
 
@@ -1200,3 +1194,33 @@ getdentsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc)
     return status;
 }
 #endif
+
+#if defined(SYS_getdents)
+SyscallReturn
+getdentsFunc(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc)
+{
+    typedef struct linux_dirent {
+        unsigned long d_ino;
+        unsigned long d_off;
+        unsigned short d_reclen;
+        char dname[];
+    } LinDent;
+
+    return getdentsImpl<LinDent, SYS_getdents>(desc, callnum, p, tc);
+}
+#endif
+
+#if defined(SYS_getdents64)
+SyscallReturn
+getdents64Func(SyscallDesc *desc, int callnum, Process *p, ThreadContext *tc)
+{
+    typedef struct linux_dirent64 {
+        ino64_t d_ino;
+        off64_t d_off;
+        unsigned short d_reclen;
+        char dname[];
+    } LinDent64;
+
+    return getdentsImpl<LinDent64, SYS_getdents64>(desc, callnum, p, tc);
+}
+#endif
-- 
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