arch: Drop sysctl support if built against glibc

Since glibc 2.30 the sysctl() function has been declared deprecated and
it will be deleted in future versions. This patch removes the support
for the sysctl system call in SE mode (which is currently serviced
calling the sysctl() function) if gem5 is built against glibc, keeping
it with other libc implementations, as a temporary measure to prevent
the generation of a compilation error. Note that this system call in
gem5 is only supported for the arm/freebsd architecture.

Change-Id: Ie5fcb983d15c0a27c7820d24250d7ae5dbe12355
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/21519
Reviewed-by: Brandon Potter <Brandon.Potter@amd.com>
Maintainer: Brandon Potter <Brandon.Potter@amd.com>
Tested-by: kokoro <noreply+kokoro@google.com>

diff --git a/src/arch/arm/freebsd/process.cc b/src/arch/arm/freebsd/process.cc
index 399da3a423e535d489f1d304cb5b2be50a8447d4..901b2411b53d6de3329d79101fd190ccb042ccf4 100644 (file)
--- a/src/arch/arm/freebsd/process.cc
+++ b/src/arch/arm/freebsd/process.cc
@@ -35,7 +35,9 @@
 #include <sys/mman.h>
 #include <sys/param.h>
 #include <sys/syscall.h>
+#if !defined ( __GNU_LIBRARY__ )
 #include <sys/sysctl.h>
+#endif
 #include <sys/types.h>
 #include <utime.h>
 
@@ -90,6 +92,7 @@ issetugidFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
     return 0;
 }
 
+#if !defined ( __GNU_LIBRARY__ )
 static SyscallReturn
 sysctlFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
 {
@@ -133,6 +136,7 @@ sysctlFunc(SyscallDesc *desc, int callnum, ThreadContext *tc)
 
     return (ret);
 }
+#endif
 
 static SyscallDesc syscallDescs32[] = {
     /*    0 */ SyscallDesc("unused#000", unimplementedFunc),
@@ -888,7 +892,11 @@ static SyscallDesc syscallDescs64[] = {
     /*  199 */ SyscallDesc("unused#199", unimplementedFunc),
     /*  200 */ SyscallDesc("unused#200", unimplementedFunc),
     /*  201 */ SyscallDesc("unused#201", unimplementedFunc),
+#if !defined ( __GNU_LIBRARY__ )
     /*  202 */ SyscallDesc("sysctl", sysctlFunc),
+#else
+    /*  202 */ SyscallDesc("sysctl", unimplementedFunc),
+#endif
     /*  203 */ SyscallDesc("unused#203", unimplementedFunc),
     /*  204 */ SyscallDesc("unused#204", unimplementedFunc),
     /*  205 */ SyscallDesc("unused#205", unimplementedFunc),