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-rw-r--r--tcg/tcg.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/tcg/tcg.c b/tcg/tcg.c
index de91bb6e9e..88c9e6f8a4 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -828,7 +828,6 @@ void tcg_region_init(void)
size_t region_size;
size_t n_regions;
size_t i;
- uintptr_t splitwx_diff;
n_regions = tcg_n_regions();
@@ -858,8 +857,11 @@ void tcg_region_init(void)
/* account for that last guard page */
region.end -= page_size;
- /* set guard pages */
- splitwx_diff = tcg_splitwx_diff;
+ /*
+ * Set guard pages in the rw buffer, as that's the one into which
+ * buffer overruns could occur. Do not set guard pages in the rx
+ * buffer -- let that one use hugepages throughout.
+ */
for (i = 0; i < region.n; i++) {
void *start, *end;
int rc;
@@ -867,10 +869,6 @@ void tcg_region_init(void)
tcg_region_bounds(i, &start, &end);
rc = qemu_mprotect_none(end, page_size);
g_assert(!rc);
- if (splitwx_diff) {
- rc = qemu_mprotect_none(end + splitwx_diff, page_size);
- g_assert(!rc);
- }
}
tcg_region_trees_init();