These only depend on the host and therefore belong in the common
osdep, not in a target-dependent object.
While at it, query the host during an init constructor, which guarantees
the page size will be well-defined throughout the execution of the program.
Suggested-by: Richard Henderson <r...@twiddle.net>
Reviewed-by: Richard Henderson <r...@twiddle.net>
Signed-off-by: Emilio G. Cota <c...@braap.org>
---
include/exec/cpu-all.h | 2 --
include/qemu/osdep.h | 6 ++++++
exec.c | 4 ----
util/pagesize.c | 18 ++++++++++++++++++
util/Makefile.objs | 1 +
5 files changed, 25 insertions(+), 6 deletions(-)
create mode 100644 util/pagesize.c
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h
index ffe43d5..778031c 100644
--- a/include/exec/cpu-all.h
+++ b/include/exec/cpu-all.h
@@ -229,8 +229,6 @@ extern int target_page_bits;
/* Using intptr_t ensures that qemu_*_page_mask is sign-extended even
* when intptr_t is 32-bit and we are aligning a long long.
*/
-extern uintptr_t qemu_real_host_page_size;
-extern intptr_t qemu_real_host_page_mask;
extern uintptr_t qemu_host_page_size;
extern intptr_t qemu_host_page_mask;
diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index 3b74f6f..0cba871 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -481,6 +481,12 @@ char *qemu_get_pid_name(pid_t pid);
*/
pid_t qemu_fork(Error **errp);
+/* Using intptr_t ensures that qemu_*_page_mask is sign-extended even
+ * when intptr_t is 32-bit and we are aligning a long long.
+ */
+extern uintptr_t qemu_real_host_page_size;
+extern intptr_t qemu_real_host_page_mask;
+
extern int qemu_icache_linesize;
extern int qemu_dcache_linesize;
diff --git a/exec.c b/exec.c
index 94b0f3e..6e85535 100644
--- a/exec.c
+++ b/exec.c
@@ -121,8 +121,6 @@ int use_icount;
uintptr_t qemu_host_page_size;
intptr_t qemu_host_page_mask;
-uintptr_t qemu_real_host_page_size;
-intptr_t qemu_real_host_page_mask;
bool set_preferred_target_page_bits(int bits)
{
@@ -3621,8 +3619,6 @@ void page_size_init(void)
{
/* NOTE: we can always suppose that qemu_host_page_size >=
TARGET_PAGE_SIZE */
- qemu_real_host_page_size = getpagesize();
- qemu_real_host_page_mask = -(intptr_t)qemu_real_host_page_size;
if (qemu_host_page_size == 0) {
qemu_host_page_size = qemu_real_host_page_size;
}
diff --git a/util/pagesize.c b/util/pagesize.c
new file mode 100644
index 0000000..998632c
--- /dev/null
+++ b/util/pagesize.c
@@ -0,0 +1,18 @@
+/*
+ * pagesize.c - query the host about its page size
+ *
+ * Copyright (C) 2017, Emilio G. Cota <c...@braap.org>
+ * License: GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+
+uintptr_t qemu_real_host_page_size;
+intptr_t qemu_real_host_page_mask;
+
+static void __attribute__((constructor)) init_real_host_page_size(void)
+{
+ qemu_real_host_page_size = getpagesize();
+ qemu_real_host_page_mask = -(intptr_t)qemu_real_host_page_size;
+}
diff --git a/util/Makefile.objs b/util/Makefile.objs
index 50a55ec..2973b0a 100644
--- a/util/Makefile.objs
+++ b/util/Makefile.objs
@@ -40,6 +40,7 @@ util-obj-y += buffer.o
util-obj-y += timed-average.o
util-obj-y += base64.o
util-obj-y += log.o
+util-obj-y += pagesize.o
util-obj-y += qdist.o
util-obj-y += qht.o
util-obj-y += range.o
--
2.7.4
