1 files changed, 90 insertions, 0 deletions
diff --git a/linux-user/sparc/target_cpu.h b/linux-user/sparc/target_cpu.h
new file mode 100644
index 000000000..1f4bed50f
--- /dev/null
+++ b/linux-user/sparc/target_cpu.h
@@ -0,0 +1,90 @@
+/*
+ * SPARC specific CPU ABI and functions for linux-user
+ *
+ * Copyright (C) 2003 Thomas M. Ogrisegg <tom@fnord.at>
+ * Copyright (C) 2003-2005 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef SPARC_TARGET_CPU_H
+#define SPARC_TARGET_CPU_H
+
+#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
+# define TARGET_STACK_BIAS 2047
+#else
+# define TARGET_STACK_BIAS 0
+#endif
+
+static inline void cpu_clone_regs_child(CPUSPARCState *env, target_ulong newsp,
+                                        unsigned flags)
+{
+    /*
+     * After cpu_copy, env->regwptr is pointing into the old env.
+     * Update the new cpu to use its own register window.
+     */
+    env->regwptr = env->regbase + (env->cwp * 16);
+
+    if (newsp) {
+        /* When changing stacks, do it with clean register windows.  */
+#ifdef TARGET_SPARC64
+        env->cansave = env->nwindows - 2;
+        env->cleanwin = env->nwindows - 2;
+        env->canrestore = 0;
+#else
+        env->wim = 1 << env->cwp;
+#endif
+        /* ??? The kernel appears to copy one stack frame to the new stack. */
+        /* ??? The kernel force aligns the new stack. */
+        /* Userspace provides a biased stack pointer value. */
+        env->regwptr[WREG_SP] = newsp;
+    }
+
+    if (flags & CLONE_VM) {
+        /*
+         * Syscall return for clone child: %o0 = 0 and clear CF since this
+         * counts as a success return value.  Advance the PC past the syscall.
+         * For fork child, all of this happens in cpu_loop, and we must not
+         * do the pc advance twice.
+         */
+        env->regwptr[WREG_O0] = 0;
+#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
+        env->xcc &= ~PSR_CARRY;
+#else
+        env->psr &= ~PSR_CARRY;
+#endif
+        env->pc = env->npc;
+        env->npc = env->npc + 4;
+    }
+
+    /* Set the second return value for the child: %o1 = 1.  */
+    env->regwptr[WREG_O1] = 1;
+}
+
+static inline void cpu_clone_regs_parent(CPUSPARCState *env, unsigned flags)
+{
+    /* Set the second return value for the parent: %o1 = 0.  */
+    env->regwptr[WREG_O1] = 0;
+}
+
+static inline void cpu_set_tls(CPUSPARCState *env, target_ulong newtls)
+{
+    env->gregs[7] = newtls;
+}
+
+static inline abi_ulong get_sp_from_cpustate(CPUSPARCState *state)
+{
+    return state->regwptr[WREG_SP] + TARGET_STACK_BIAS;
+}
+
+#endif