syscall-emul: Add or extend dup, dup2, and pipe

This changeset extends the pipe system call to work with
architectures other than Alpha (and enables the syscall for
x86). For the dup system call, it sets the clone-on-exec
flag by default. For the dup2 system call, the changeset
adds an implementation (and enables it for x86).

Change-Id: I00ddb416744ee7dd61a5cd02c4c3d97f30543878
Reviewed-on: https://gem5-review.googlesource.com/2266
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com>
Reviewed-by: Michael LeBeane <Michael.Lebeane@amd.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/sim/syscall_emul.hh b/src/sim/syscall_emul.hh
index d379bbe85..d75841cc6 100644
--- a/src/sim/syscall_emul.hh
+++ b/src/sim/syscall_emul.hh
@@ -241,6 +241,10 @@ SyscallReturn fchownFunc(SyscallDesc *desc, int num,
 SyscallReturn dupFunc(SyscallDesc *desc, int num,
                       Process *process, ThreadContext *tc);
 
+/// Target dup2() handler.
+SyscallReturn dup2Func(SyscallDesc *desc, int num,
+                       Process *process, ThreadContext *tc);
+
 /// Target fcntl() handler.
 SyscallReturn fcntlFunc(SyscallDesc *desc, int num,
                         Process *process, ThreadContext *tc);
@@ -253,6 +257,14 @@ SyscallReturn fcntl64Func(SyscallDesc *desc, int num,
 SyscallReturn setuidFunc(SyscallDesc *desc, int num,
                          Process *p, ThreadContext *tc);
 
+/// Target pipe() handler.
+SyscallReturn pipeFunc(SyscallDesc *desc, int num,
+                       Process *p, ThreadContext *tc);
+
+/// Internal pipe() handler.
+SyscallReturn pipeImpl(SyscallDesc *desc, int num, Process *p,
+                       ThreadContext *tc, bool pseudoPipe);
+
 /// Target getpid() handler.
 SyscallReturn getpidFunc(SyscallDesc *desc, int num,
                          Process *p, ThreadContext *tc);