diff options
| author | Denis Pynkin | 2017-07-21 19:28:42 +0300 |
|---|---|---|
| committer | Joe Hershberger | 2017-08-07 15:18:31 -0500 |
| commit | 704f3acfcf55343043bbed01c5fb0a0094a68e8a (patch) | |
| tree | 0cfaa8fdbf7794beb1773b79a6b526e83f693a4d /include/net.h | |
| parent | 66c89ee31b778a3c45b63b4d39ada2c6b5a2844a (diff) | |
net: Use packed structures for networking
PXE boot is broken with GCC 7.1 due option '-fstore-merging' enabled
by default for '-O2':
BOOTP broadcast 1
data abort
pc : [<8ff8bb30>] lr : [<00004f1f>]
reloc pc : [<17832b30>] lr : [<878abf1f>]
sp : 8f558bc0 ip : 00000000 fp : 8ffef5a4
r10: 8ffed248 r9 : 8f558ee0 r8 : 8ffef594
r7 : 0000000e r6 : 8ffed700 r5 : 00000000 r4 : 8ffed74e
r3 : 00060101 r2 : 8ffed230 r1 : 8ffed706 r0 : 00000ddd
Flags: nzcv IRQs off FIQs off Mode SVC_32
Resetting CPU ...
Core reason is usage of structures for network headers without packed
attribute.
Reviewed-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Diffstat (limited to 'include/net.h')
| -rw-r--r-- | include/net.h | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/include/net.h b/include/net.h index 2eaa88224c9..e1269486ad9 100644 --- a/include/net.h +++ b/include/net.h @@ -308,7 +308,7 @@ struct ethernet_hdr { u8 et_dest[ARP_HLEN]; /* Destination node */ u8 et_src[ARP_HLEN]; /* Source node */ u16 et_protlen; /* Protocol or length */ -}; +} __attribute__((packed)); /* Ethernet header size */ #define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr)) @@ -326,7 +326,7 @@ struct e802_hdr { u8 et_snap2; u8 et_snap3; u16 et_prot; /* 802 protocol */ -}; +} __attribute__((packed)); /* 802 + SNAP + ethernet header size */ #define E802_HDR_SIZE (sizeof(struct e802_hdr)) @@ -340,7 +340,7 @@ struct vlan_ethernet_hdr { u16 vet_vlan_type; /* PROT_VLAN */ u16 vet_tag; /* TAG of VLAN */ u16 vet_type; /* protocol type */ -}; +} __attribute__((packed)); /* VLAN Ethernet header size */ #define VLAN_ETHER_HDR_SIZE (sizeof(struct vlan_ethernet_hdr)) @@ -369,7 +369,7 @@ struct ip_hdr { u16 ip_sum; /* checksum */ struct in_addr ip_src; /* Source IP address */ struct in_addr ip_dst; /* Destination IP address */ -}; +} __attribute__((packed)); #define IP_OFFS 0x1fff /* ip offset *= 8 */ #define IP_FLAGS 0xe000 /* first 3 bits */ @@ -397,7 +397,7 @@ struct ip_udp_hdr { u16 udp_dst; /* UDP destination port */ u16 udp_len; /* Length of UDP packet */ u16 udp_xsum; /* Checksum */ -}; +} __attribute__((packed)); #define IP_UDP_HDR_SIZE (sizeof(struct ip_udp_hdr)) #define UDP_HDR_SIZE (IP_UDP_HDR_SIZE - IP_HDR_SIZE) @@ -435,7 +435,7 @@ struct arp_hdr { u8 ar_tha[]; /* Target hardware address */ u8 ar_tpa[]; /* Target protocol address */ #endif /* 0 */ -}; +} __attribute__((packed)); #define ARP_HDR_SIZE (8+20) /* Size assuming ethernet */ @@ -470,7 +470,7 @@ struct icmp_hdr { } frag; u8 data[0]; } un; -}; +} __attribute__((packed)); #define ICMP_HDR_SIZE (sizeof(struct icmp_hdr)) #define IP_ICMP_HDR_SIZE (IP_HDR_SIZE + ICMP_HDR_SIZE) |