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, 92 insertions, 0 deletions

diff --git a/bsd-user/x86_64/target_arch_reg.h b/bsd-user/x86_64/target_arch_reg.h
new file mode 100644
index 000000000..00e962451
--- /dev/null
+++ b/bsd-user/x86_64/target_arch_reg.h
@@ -0,0 +1,92 @@
+/*
+ *  FreeBSD amd64 register structures
+ *
+ *  Copyright (c) 2015 Stacey Son
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _TARGET_ARCH_REG_H_
+#define _TARGET_ARCH_REG_H_
+
+/* See sys/amd64/include/reg.h */
+typedef struct target_reg {
+    uint64_t        r_r15;
+    uint64_t        r_r14;
+    uint64_t        r_r13;
+    uint64_t        r_r12;
+    uint64_t        r_r11;
+    uint64_t        r_r10;
+    uint64_t        r_r9;
+    uint64_t        r_r8;
+    uint64_t        r_rdi;
+    uint64_t        r_rsi;
+    uint64_t        r_rbp;
+    uint64_t        r_rbx;
+    uint64_t        r_rdx;
+    uint64_t        r_rcx;
+    uint64_t        r_rax;
+    uint32_t        r_trapno;
+    uint16_t        r_fs;
+    uint16_t        r_gs;
+    uint32_t        r_err;
+    uint16_t        r_es;
+    uint16_t        r_ds;
+    uint64_t        r_rip;
+    uint64_t        r_cs;
+    uint64_t        r_rflags;
+    uint64_t        r_rsp;
+    uint64_t        r_ss;
+} target_reg_t;
+
+typedef struct target_fpreg {
+    uint64_t        fpr_env[4];
+    uint8_t         fpr_acc[8][16];
+    uint8_t         fpr_xacc[16][16];
+    uint64_t        fpr_spare[12];
+} target_fpreg_t;
+
+static inline void target_copy_regs(target_reg_t *regs, const CPUX86State *env)
+{
+
+    regs->r_r15 = env->regs[15];
+    regs->r_r14 = env->regs[14];
+    regs->r_r13 = env->regs[13];
+    regs->r_r12 = env->regs[12];
+    regs->r_r11 = env->regs[11];
+    regs->r_r10 = env->regs[10];
+    regs->r_r9 = env->regs[9];
+    regs->r_r8 = env->regs[8];
+    regs->r_rdi = env->regs[R_EDI];
+    regs->r_rsi = env->regs[R_ESI];
+    regs->r_rbp = env->regs[R_EBP];
+    regs->r_rbx = env->regs[R_EBX];
+    regs->r_rdx = env->regs[R_EDX];
+    regs->r_rcx = env->regs[R_ECX];
+    regs->r_rax = env->regs[R_EAX];
+    /* regs->r_trapno = env->regs[R_TRAPNO]; XXX */
+    regs->r_fs = env->segs[R_FS].selector & 0xffff;
+    regs->r_gs = env->segs[R_GS].selector & 0xffff;
+    regs->r_err = env->error_code;  /* XXX ? */
+    regs->r_es = env->segs[R_ES].selector & 0xffff;
+    regs->r_ds = env->segs[R_DS].selector & 0xffff;
+    regs->r_rip = env->eip;
+    regs->r_cs = env->segs[R_CS].selector & 0xffff;
+    regs->r_rflags = env->eflags;
+    regs->r_rsp = env->regs[R_ESP];
+    regs->r_ss = env->segs[R_SS].selector & 0xffff;
+}
+
+#endif /* !_TARGET_ARCH_REG_H_ */