sim-se,arch-riscv: Fixes file-related flags for riscv64 target

Previous file-related flags for the riscv64-unknown-linux-gnu target
do not match the actual
values, leading to incorrect behaviours in certain emulated syscalls.
This commit fixes the problem.

Change-Id: I38ff624c00e46e37672510af5a10f527b5f0842a
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/64472
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
diff --git a/src/arch/riscv/linux/linux.hh b/src/arch/riscv/linux/linux.hh
index 4672475..b072183 100644
--- a/src/arch/riscv/linux/linux.hh
+++ b/src/arch/riscv/linux/linux.hh
@@ -94,20 +94,20 @@
     static constexpr int TGT_O_TRUNC        = 0x000200; //!< O_TRUNC
     static constexpr int TGT_O_APPEND       = 0x000400; //!< O_APPEND
     static constexpr int TGT_O_NONBLOCK     = 0x000800; //!< O_NONBLOCK
-    static constexpr int TGT_O_SYNC         = 0x001000; //!< O_SYNC
+    static constexpr int TGT_O_SYNC         = 0x101000; //!< O_SYNC
     static constexpr int TGT_FSYNC          = 0x001000; //!< FSYNC
-    static constexpr int TGT_FASYNC         = 0x008000; //!< FASYNC
+    static constexpr int TGT_FASYNC         = 0x002000; //!< FASYNC
     // The following are not present in riscv64-unknown-elf <fcntl.h>
-    static constexpr int TGT_O_DSYNC        = 0x010000; //!< O_DSYNC
-    static constexpr int TGT_O_CLOEXEC      = 0x040000; //!< O_CLOEXEC
+    static constexpr int TGT_O_DSYNC        = 0x001000; //!< O_DSYNC
+    static constexpr int TGT_O_CLOEXEC      = 0x080000; //!< O_CLOEXEC
     static constexpr int TGT_O_NOINHERIT    = 0x040000; //!< O_NOINHERIT
-    static constexpr int TGT_O_DIRECT       = 0x080000; //!< O_DIRECT
-    static constexpr int TGT_O_NOFOLLOW     = 0x100000; //!< O_NOFOLLOW
-    static constexpr int TGT_O_DIRECTORY    = 0x200000; //!< O_DIRECTORY
+    static constexpr int TGT_O_DIRECT       = 0x004000; //!< O_DIRECT
+    static constexpr int TGT_O_NOFOLLOW     = 0x020000; //!< O_NOFOLLOW
+    static constexpr int TGT_O_DIRECTORY    = 0x010000; //!< O_DIRECTORY
     // The following are not defined by riscv64-unknown-elf
-    static constexpr int TGT_O_LARGEFILE    = 0x020000; //!< O_LARGEFILE
-    static constexpr int TGT_O_NOATIME      = 0x800000; //!< O_NOATIME
-    static constexpr int TGT_O_PATH         = 0x400000; //!< O_PATH
+    static constexpr int TGT_O_LARGEFILE    = 0x000000; //!< O_LARGEFILE
+    static constexpr int TGT_O_NOATIME      = 0x040000; //!< O_NOATIME
+    static constexpr int TGT_O_PATH         = 0x200000; //!< O_PATH
     //@}
 
     // Only defined in riscv-unknown-elf for proxy kernel and not linux kernel