diff options
Diffstat (limited to 'include/mach/message.h')
| -rw-r--r-- | include/mach/message.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/mach/message.h b/include/mach/message.h index 21c551c2..63341e6f 100644 --- a/include/mach/message.h +++ b/include/mach/message.h @@ -132,6 +132,9 @@ typedef unsigned int mach_msg_size_t; typedef natural_t mach_msg_seqno_t; typedef integer_t mach_msg_id_t; +/* Force 4-byte alignment to simplify how the kernel parses the messages */ +#pragma pack(push, 4) + /* full header structure, may have different size in user/kernel spaces */ typedef struct mach_msg_header { mach_msg_bits_t msgh_bits; @@ -151,7 +154,10 @@ typedef struct { mach_msg_bits_t msgh_bits; mach_msg_size_t msgh_size; mach_port_name_t msgh_remote_port; - mach_port_name_t msgh_local_port; + union { + mach_port_name_t msgh_local_port; + rpc_uintptr_t msgh_protected_payload; + }; mach_port_seqno_t msgh_seqno; mach_msg_id_t msgh_id; } mach_msg_user_header_t; @@ -224,6 +230,7 @@ typedef struct { natural_t msgtl_number; } mach_msg_type_long_t; +#pragma pack(pop) /* * Known values for the msgt_name field. |