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authorPaul Burton <paul@archlinuxmips.org>2014-06-22 11:25:33 +0100
committerRiku Voipio <riku.voipio@linaro.org>2014-06-29 14:19:58 +0300
commit8289d112811adfd609c1e3d855427a96418564b0 (patch)
tree2847284d80a3a6d03764baa7ec1faaedde010093 /linux-user
parent76b94245507881a0621c5bb3b144c3c19dcbcb4d (diff)
linux-user: translate the result of getsockopt SO_TYPE
QEMU previously passed the result of the host syscall directly to the target program. This is a problem if the host & target have different representations of socket types, as is the case when running a MIPS target program on an x86 host. Introduce a host_to_target_sock_type helper function mirroring the existing target_to_host_sock_type, and call it to translate the value provided by getsockopt when called for the SO_TYPE option. Signed-off-by: Paul Burton <paul@archlinuxmips.org> Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/syscall.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 5c175ba13a..8d13781bf8 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -592,6 +592,37 @@ char *target_strerror(int err)
return strerror(target_to_host_errno(err));
}
+static inline int host_to_target_sock_type(int host_type)
+{
+ int target_type;
+
+ switch (host_type & 0xf /* SOCK_TYPE_MASK */) {
+ case SOCK_DGRAM:
+ target_type = TARGET_SOCK_DGRAM;
+ break;
+ case SOCK_STREAM:
+ target_type = TARGET_SOCK_STREAM;
+ break;
+ default:
+ target_type = host_type & 0xf /* SOCK_TYPE_MASK */;
+ break;
+ }
+
+#if defined(SOCK_CLOEXEC)
+ if (host_type & SOCK_CLOEXEC) {
+ target_type |= TARGET_SOCK_CLOEXEC;
+ }
+#endif
+
+#if defined(SOCK_NONBLOCK)
+ if (host_type & SOCK_NONBLOCK) {
+ target_type |= TARGET_SOCK_NONBLOCK;
+ }
+#endif
+
+ return target_type;
+}
+
static abi_ulong target_brk;
static abi_ulong target_original_brk;
static abi_ulong brk_page;
@@ -1636,6 +1667,9 @@ static abi_long do_getsockopt(int sockfd, int level, int optname,
ret = get_errno(getsockopt(sockfd, level, optname, &val, &lv));
if (ret < 0)
return ret;
+ if (optname == SO_TYPE) {
+ val = host_to_target_sock_type(val);
+ }
if (len > lv)
len = lv;
if (len == 4) {