+static void
+collect_register_i386 (struct regcache *regcache, int regno, void *buf)
+{
+ collect_register (regcache, regno, buf);
+
+#ifdef __x86_64__
+ /* In case of x86_64 -m32, collect_register only writes 4 bytes, but the
+ space reserved in buf for the register is 8 bytes. Make sure the entire
+ reserved space is initialized. */
+
+ gdb_assert (register_size (regcache->tdesc, regno) == 4);
+
+ if (regno == RAX)
+ {
+ /* Sign extend EAX value to avoid potential syscall restart
+ problems.
+
+ See amd64_linux_collect_native_gregset() in
+ gdb/amd64-linux-nat.c for a detailed explanation. */
+ *(int64_t *) buf = *(int32_t *) buf;
+ }
+ else
+ {
+ /* Zero-extend. */
+ *(uint64_t *) buf = *(uint32_t *) buf;
+ }
+#endif
+}
+