Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 44 insertions, 0 deletions

diff --git a/linux-user/arm/target_syscall.h b/linux-user/arm/target_syscall.h
new file mode 100644
index 000000000..e870ed7a5
--- /dev/null
+++ b/linux-user/arm/target_syscall.h
@@ -0,0 +1,44 @@
+#ifndef ARM_TARGET_SYSCALL_H
+#define ARM_TARGET_SYSCALL_H
+
+/* this struct defines the way the registers are stored on the
+   stack during a system call. */
+
+/* uregs[0..15] are r0 to r15; uregs[16] is CPSR; uregs[17] is ORIG_r0 */
+struct target_pt_regs {
+    abi_long uregs[18];
+};
+
+#define ARM_SYSCALL_BASE	0x900000
+#define ARM_THUMB_SYSCALL	0
+
+#define ARM_NR_BASE	  0xf0000
+#define ARM_NR_breakpoint (ARM_NR_BASE + 1)
+#define ARM_NR_cacheflush (ARM_NR_BASE + 2)
+#define ARM_NR_set_tls	  (ARM_NR_BASE + 5)
+#define ARM_NR_get_tls    (ARM_NR_BASE + 6)
+
+#if defined(TARGET_WORDS_BIGENDIAN)
+#define UNAME_MACHINE "armv5teb"
+#else
+#define UNAME_MACHINE "armv5tel"
+#endif
+#define UNAME_MINIMUM_RELEASE "2.6.32"
+
+#define TARGET_CLONE_BACKWARDS
+
+#define TARGET_MINSIGSTKSZ 2048
+#define TARGET_MCL_CURRENT 1
+#define TARGET_MCL_FUTURE  2
+#define TARGET_MCL_ONFAULT 4
+
+#define TARGET_WANT_OLD_SYS_SELECT
+
+#define TARGET_FORCE_SHMLBA
+
+static inline abi_ulong target_shmlba(CPUARMState *env)
+{
+    return 4 * 4096;
+}
+
+#endif /* ARM_TARGET_SYSCALL_H */