aboutsummaryrefslogtreecommitdiff
path: root/util
diff options
context:
space:
mode:
authorEmilio G. Cota <cota@braap.org>2017-07-15 02:28:47 -0400
committerRichard Henderson <richard.henderson@linaro.org>2017-10-24 13:53:42 -0700
commit5fa64b3130af9a45e7e2a904bde1f8cfb72be5c9 (patch)
treea72d9970a7ad3d12caa1afc5b60ba449369e643c /util
parent34184b071817b4f9edbfd1aa2225c196f05a0947 (diff)
downloadqemu-5fa64b3130af9a45e7e2a904bde1f8cfb72be5c9.zip
qemu-5fa64b3130af9a45e7e2a904bde1f8cfb72be5c9.tar.gz
qemu-5fa64b3130af9a45e7e2a904bde1f8cfb72be5c9.tar.bz2
osdep: introduce qemu_mprotect_rwx/none
Reviewed-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Emilio G. Cota <cota@braap.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'util')
-rw-r--r--util/osdep.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/util/osdep.c b/util/osdep.c
index a479fed..1231f9f 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -73,6 +73,47 @@ int qemu_madvise(void *addr, size_t len, int advice)
#endif
}
+static int qemu_mprotect__osdep(void *addr, size_t size, int prot)
+{
+ g_assert(!((uintptr_t)addr & ~qemu_real_host_page_mask));
+ g_assert(!(size & ~qemu_real_host_page_mask));
+
+#ifdef _WIN32
+ DWORD old_protect;
+
+ if (!VirtualProtect(addr, size, prot, &old_protect)) {
+ error_report("%s: VirtualProtect failed with error code %ld",
+ __func__, GetLastError());
+ return -1;
+ }
+ return 0;
+#else
+ if (mprotect(addr, size, prot)) {
+ error_report("%s: mprotect failed: %s", __func__, strerror(errno));
+ return -1;
+ }
+ return 0;
+#endif
+}
+
+int qemu_mprotect_rwx(void *addr, size_t size)
+{
+#ifdef _WIN32
+ return qemu_mprotect__osdep(addr, size, PAGE_EXECUTE_READWRITE);
+#else
+ return qemu_mprotect__osdep(addr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
+#endif
+}
+
+int qemu_mprotect_none(void *addr, size_t size)
+{
+#ifdef _WIN32
+ return qemu_mprotect__osdep(addr, size, PAGE_NOACCESS);
+#else
+ return qemu_mprotect__osdep(addr, size, PROT_NONE);
+#endif
+}
+
#ifndef _WIN32
static int fcntl_op_setlk = -1;