semihosting: Rename softmmu_FOO_user() -> uaccess_FOO_user()

Add a check in 'softmmu-uaccess.h' that the header is only
include in system emulation, and rename it as 'uaccess.h'.

Rename the API methods:

  - softmmu_[un]lock_user*() -> uaccess_[un]lock_user*()
  - softmmu_strlen_user() -> uaccess_strlen_user().

Update a pair of comments.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20231004090629.37473-9-philmd@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

include/semihosting/uaccess.h

@@ -7,8 +7,12 @@
  * This code is licensed under the GPL
  */
 
-#ifndef SEMIHOSTING_SOFTMMU_UACCESS_H
-#define SEMIHOSTING_SOFTMMU_UACCESS_H
+#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"
 
@@ -42,18 +46,18 @@
 
 #define put_user_ual(arg, p) put_user_u32(arg, p)
 
-void *softmmu_lock_user(CPUArchState *env, target_ulong addr,
+void *uaccess_lock_user(CPUArchState *env, target_ulong addr,
                         target_ulong len, bool copy);
-#define lock_user(type, p, len, copy) softmmu_lock_user(env, p, len, copy)
+#define lock_user(type, p, len, copy) uaccess_lock_user(env, p, len, copy)
 
-char *softmmu_lock_user_string(CPUArchState *env, target_ulong addr);
-#define lock_user_string(p) softmmu_lock_user_string(env, p)
+char *uaccess_lock_user_string(CPUArchState *env, target_ulong addr);
+#define lock_user_string(p) uaccess_lock_user_string(env, p)
 
-void softmmu_unlock_user(CPUArchState *env, void *p,
+void uaccess_unlock_user(CPUArchState *env, void *p,
                          target_ulong addr, target_ulong len);
-#define unlock_user(s, args, len) softmmu_unlock_user(env, s, args, len)
+#define unlock_user(s, args, len) uaccess_unlock_user(env, s, args, len)
 
-ssize_t softmmu_strlen_user(CPUArchState *env, target_ulong addr);
-#define target_strlen(p) softmmu_strlen_user(env, p)
+ssize_t uaccess_strlen_user(CPUArchState *env, target_ulong addr);
+#define target_strlen(p) uaccess_strlen_user(env, p)
 
 #endif /* SEMIHOSTING_SOFTMMU_UACCESS_H */

semihosting/arm-compat-semi.c

@@ -202,13 +202,13 @@ static LayoutInfo common_semi_find_bases(CPUState *cs)
  * The semihosting API has no concept of its errno being thread-safe,
  * as the API design predates SMP CPUs and was intended as a simple
  * real-hardware set of debug functionality. For QEMU, we make the
- * errno be per-thread in linux-user mode; in softmmu it is a simple
+ * errno be per-thread in linux-user mode; in system-mode it is a simple
  * global, and we assume that the guest takes care of avoiding any races.
  */
 #ifndef CONFIG_USER_ONLY
 static target_ulong syscall_err;
 
-#include "semihosting/softmmu-uaccess.h"
+#include "semihosting/uaccess.h"
 #endif
 
 static inline uint32_t get_swi_errno(CPUState *cs)

semihosting/config.c

@@ -12,7 +12,7 @@
  * linux-user targets. However in that use case no configuration of
  * the outputs and command lines is supported.
  *
- * The config module is common to all softmmu targets however as vl.c
+ * The config module is common to all system targets however as vl.c
  * needs to link against the helpers.
  *
  * SPDX-License-Identifier: GPL-2.0-or-later

semihosting/guestfd.c

@@ -15,7 +15,7 @@
 #ifdef CONFIG_USER_ONLY
 #include "qemu.h"
 #else
-#include "semihosting/softmmu-uaccess.h"
+#include "semihosting/uaccess.h"
 #include CONFIG_DEVICES
 #endif
 

semihosting/syscalls.c

@@ -15,7 +15,7 @@
 #ifdef CONFIG_USER_ONLY
 #include "qemu.h"
 #else
-#include "semihosting/softmmu-uaccess.h"
+#include "semihosting/uaccess.h"
 #endif
 
 

semihosting/uaccess.c

@@ -9,9 +9,9 @@
 
 #include "qemu/osdep.h"
 #include "exec/exec-all.h"
-#include "semihosting/softmmu-uaccess.h"
+#include "semihosting/uaccess.h"
 
-void *softmmu_lock_user(CPUArchState *env, target_ulong addr,
+void *uaccess_lock_user(CPUArchState *env, target_ulong addr,
                         target_ulong len, bool copy)
 {
     void *p = malloc(len);
@@ -24,7 +24,7 @@ void *softmmu_lock_user(CPUArchState *env, target_ulong addr,
     return p;
 }
 
-ssize_t softmmu_strlen_user(CPUArchState *env, target_ulong addr)
+ssize_t uaccess_strlen_user(CPUArchState *env, target_ulong addr)
 {
     int mmu_idx = cpu_mmu_index(env, false);
     size_t len = 0;
@@ -72,16 +72,16 @@ ssize_t softmmu_strlen_user(CPUArchState *env, target_ulong addr)
     }
 }
 
-char *softmmu_lock_user_string(CPUArchState *env, target_ulong addr)
+char *uaccess_lock_user_string(CPUArchState *env, target_ulong addr)
 {
-    ssize_t len = softmmu_strlen_user(env, addr);
+    ssize_t len = uaccess_strlen_user(env, addr);
     if (len < 0) {
         return NULL;
     }
-    return softmmu_lock_user(env, addr, len + 1, true);
+    return uaccess_lock_user(env, addr, len + 1, true);
 }
 
-void softmmu_unlock_user(CPUArchState *env, void *p,
+void uaccess_unlock_user(CPUArchState *env, void *p,
                          target_ulong addr, target_ulong len)
 {
     if (len) {

stubs/semihost.c

@@ -1,9 +1,9 @@
 /*
- * Semihosting Stubs for SoftMMU
+ * Semihosting Stubs for system emulation
  *
  * Copyright (c) 2019 Linaro Ltd
  *
- * Stubs for SoftMMU targets that don't actually do semihosting.
+ * Stubs for system targets that don't actually do semihosting.
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  */

target/m68k/m68k-semi.c

@@ -27,7 +27,7 @@
 #include "gdbstub/syscalls.h"
 #include "gdbstub/helpers.h"
 #include "semihosting/syscalls.h"
-#include "semihosting/softmmu-uaccess.h"
+#include "semihosting/uaccess.h"
 #include "hw/boards.h"
 #include "qemu/log.h"
 

target/mips/tcg/sysemu/mips-semi.c

@@ -22,7 +22,7 @@
 #include "qemu/log.h"
 #include "gdbstub/syscalls.h"
 #include "gdbstub/helpers.h"
-#include "semihosting/softmmu-uaccess.h"
+#include "semihosting/uaccess.h"
 #include "semihosting/semihost.h"
 #include "semihosting/console.h"
 #include "semihosting/syscalls.h"

target/nios2/nios2-semi.c

@@ -26,7 +26,7 @@
 #include "gdbstub/syscalls.h"
 #include "gdbstub/helpers.h"
 #include "semihosting/syscalls.h"
-#include "semihosting/softmmu-uaccess.h"
+#include "semihosting/uaccess.h"
 #include "qemu/log.h"
 
 #define HOSTED_EXIT  0