1 files changed, 63 insertions, 0 deletions
diff --git a/include/semihosting/uaccess.h b/include/semihosting/uaccess.h
new file mode 100644
index 0000000000..3963eafc3e
--- /dev/null
+++ b/include/semihosting/uaccess.h
@@ -0,0 +1,63 @@
+/*
+ * Helper routines to provide target memory access for semihosting
+ * syscalls in system emulation mode.
+ *
+ * Copyright (c) 2007 CodeSourcery.
+ *
+ * This code is licensed under the GPL
+ */
+
+#ifndef SEMIHOSTING_UACCESS_H
+#define SEMIHOSTING_UACCESS_H
+
+#ifdef CONFIG_USER_ONLY
+#error Cannot include semihosting/uaccess.h from user emulation
+#endif
+
+#include "cpu.h"
+
+#define get_user_u64(val, addr)                                         \
+    ({ uint64_t val_ = 0;                                               \
+       int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr),             \
+                                      &val_, sizeof(val_), 0);          \
+       (val) = tswap64(val_); ret_; })
+
+#define get_user_u32(val, addr)                                         \
+    ({ uint32_t val_ = 0;                                               \
+       int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr),             \
+                                      &val_, sizeof(val_), 0);          \
+       (val) = tswap32(val_); ret_; })
+
+#define get_user_u8(val, addr)                                          \
+    ({ uint8_t val_ = 0;                                                \
+       int ret_ = cpu_memory_rw_debug(env_cpu(env), (addr),             \
+                                      &val_, sizeof(val_), 0);          \
+       (val) = val_; ret_; })
+
+#define get_user_ual(arg, p) get_user_u32(arg, p)
+
+#define put_user_u64(val, addr)                                         \
+    ({ uint64_t val_ = tswap64(val);                                    \
+       cpu_memory_rw_debug(env_cpu(env), (addr), &val_, sizeof(val_), 1); })
+
+#define put_user_u32(val, addr)                                         \
+    ({ uint32_t val_ = tswap32(val);                                    \
+       cpu_memory_rw_debug(env_cpu(env), (addr), &val_, sizeof(val_), 1); })
+
+#define put_user_ual(arg, p) put_user_u32(arg, p)
+
+void *uaccess_lock_user(CPUArchState *env, target_ulong addr,
+                        target_ulong len, bool copy);
+#define lock_user(type, p, len, copy) uaccess_lock_user(env, p, len, copy)
+
+char *uaccess_lock_user_string(CPUArchState *env, target_ulong addr);
+#define lock_user_string(p) uaccess_lock_user_string(env, p)
+
+void uaccess_unlock_user(CPUArchState *env, void *p,
+                         target_ulong addr, target_ulong len);
+#define unlock_user(s, args, len) uaccess_unlock_user(env, s, args, len)
+
+ssize_t uaccess_strlen_user(CPUArchState *env, target_ulong addr);
+#define target_strlen(p) uaccess_strlen_user(env, p)
+
+#endif /* SEMIHOSTING_SOFTMMU_UACCESS_H */