[PATCH v2 21/23] exec/cpu-all: Restrict inclusion of 'exec/user/guest-base.h'

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

Declare 'have_guest_base' in "exec/user/guest-base.h".
Very few files require this header, so explicitly include
it there instead of "exec/cpu-all.h" which is used in many
source files.
Assert this user-specific header is only included from user
emulation.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/exec/cpu-all.h         | 3 ---
 include/exec/cpu_ldst.h        | 2 ++
 include/exec/user/guest-base.h | 6 ++++++
 bsd-user/main.c                | 1 +
 linux-user/elfload.c           | 1 +
 linux-user/main.c              | 1 +
 6 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h
index 95af418920..d2ddfae286 100644
--- a/include/exec/cpu-all.h
+++ b/include/exec/cpu-all.h
@@ -65,9 +65,6 @@
 
 #if defined(CONFIG_USER_ONLY)
 #include "exec/user/abitypes.h"
-#include "exec/user/guest-base.h"
-
-extern bool have_guest_base;
 
 /*
  * If non-zero, the guest virtual address space is a contiguous subset
diff --git a/include/exec/cpu_ldst.h b/include/exec/cpu_ldst.h
index 64e0319996..e039cc7f80 100644
--- a/include/exec/cpu_ldst.h
+++ b/include/exec/cpu_ldst.h
@@ -69,6 +69,8 @@
 
 #if defined(CONFIG_USER_ONLY)
 
+#include "exec/user/guest-base.h"
+
 #ifndef TARGET_TAGGED_ADDRESSES
 static inline abi_ptr cpu_untagged_addr(CPUState *cs, abi_ptr x)
 {
diff --git a/include/exec/user/guest-base.h b/include/exec/user/guest-base.h
index afe2ab7fbb..cf40151360 100644
--- a/include/exec/user/guest-base.h
+++ b/include/exec/user/guest-base.h
@@ -7,6 +7,12 @@
 #ifndef EXEC_USER_GUEST_BASE_H
 #define EXEC_USER_GUEST_BASE_H
 
+#ifndef CONFIG_USER_ONLY
+#error Cannot include this header from system emulation
+#endif
+
 extern uintptr_t guest_base;
 
+extern bool have_guest_base;
+
 #endif
diff --git a/bsd-user/main.c b/bsd-user/main.c
index e6014f517e..c331d727e1 100644
--- a/bsd-user/main.c
+++ b/bsd-user/main.c
@@ -36,6 +36,7 @@
 #include "qemu/help_option.h"
 #include "qemu/module.h"
 #include "exec/exec-all.h"
+#include "exec/user/guest-base.h"
 #include "tcg/startup.h"
 #include "qemu/timer.h"
 #include "qemu/envlist.h"
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index debea5c355..a8c106ec0c 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -7,6 +7,7 @@
 
 #include "qemu.h"
 #include "exec/user/tswap-target.h"
+#include "exec/user/guest-base.h"
 #include "user-internals.h"
 #include "signal-common.h"
 #include "loader.h"
diff --git a/linux-user/main.c b/linux-user/main.c
index 0cdaf30d34..84691d707b 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -38,6 +38,7 @@
 #include "qemu/help_option.h"
 #include "qemu/module.h"
 #include "qemu/plugin.h"
+#include "exec/user/guest-base.h"
 #include "exec/exec-all.h"
 #include "exec/gdbstub.h"
 #include "gdbstub/user.h"
-- 
2.41.0