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authorDenis Pynkin <denis.pynkin@collabora.com>2017-07-21 19:28:42 +0300
committerStefan Agner <stefan.agner@toradex.com>2017-08-31 19:57:38 -0700
commit341064e87ae4b1c0e32424ff64c326048bdc17c8 (patch)
treee5d45cbda95048e504cf42799e2efc37207237e7
parentc0d500225259da225757c8cd96343fae49733f43 (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> (cherry picked from commit 704f3acfcf55343043bbed01c5fb0a0094a68e8a) Conflicts: include/net.h upstream changed magic numbers with define Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com> Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
-rw-r--r--include/net.h14
-rw-r--r--net/bootp.h2
-rw-r--r--net/dns.h2
-rw-r--r--net/nfs.h2
-rw-r--r--net/sntp.h2
5 files changed, 11 insertions, 11 deletions
diff --git a/include/net.h b/include/net.h
index 06320c6514..60baf6b62e 100644
--- a/include/net.h
+++ b/include/net.h
@@ -296,7 +296,7 @@ struct ethernet_hdr {
u8 et_dest[6]; /* Destination node */
u8 et_src[6]; /* Source node */
u16 et_protlen; /* Protocol or length */
-};
+} __attribute__((packed));
/* Ethernet header size */
#define ETHER_HDR_SIZE (sizeof(struct ethernet_hdr))
@@ -314,7 +314,7 @@ 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))
@@ -328,7 +328,7 @@ 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))
@@ -357,7 +357,7 @@ 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 */
@@ -385,7 +385,7 @@ 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)
@@ -424,7 +424,7 @@ 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 */
@@ -459,7 +459,7 @@ 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)
diff --git a/net/bootp.h b/net/bootp.h
index fcb0a64e61..567340ec5d 100644
--- a/net/bootp.h
+++ b/net/bootp.h
@@ -49,7 +49,7 @@ struct bootp_hdr {
char bp_sname[64]; /* Server host name */
char bp_file[128]; /* Boot file name */
char bp_vend[OPT_FIELD_SIZE]; /* Vendor information */
-};
+} __attribute__((packed));
#define BOOTP_HDR_SIZE sizeof(struct bootp_hdr)
diff --git a/net/dns.h b/net/dns.h
index c4e96afa06..c55a5c1b04 100644
--- a/net/dns.h
+++ b/net/dns.h
@@ -29,7 +29,7 @@ struct header {
uint16_t nauth; /* Authority PRs */
uint16_t nother; /* Other PRs */
unsigned char data[1]; /* Data, variable length */
-};
+} __attribute__((packed));
void dns_start(void); /* Begin DNS */
diff --git a/net/nfs.h b/net/nfs.h
index 45da246aa1..70a1a6d554 100644
--- a/net/nfs.h
+++ b/net/nfs.h
@@ -79,7 +79,7 @@ struct rpc_t {
uint32_t data[NFS_READ_SIZE];
} reply;
} u;
-};
+} __attribute__((packed));
void nfs_start(void); /* Begin NFS */
diff --git a/net/sntp.h b/net/sntp.h
index 6a9c6bb82f..c38bceed3f 100644
--- a/net/sntp.h
+++ b/net/sntp.h
@@ -51,7 +51,7 @@ struct sntp_pkt_t {
unsigned long long originate_timestamp;
unsigned long long receive_timestamp;
unsigned long long transmit_timestamp;
-};
+} __attribute__((packed));
void sntp_start(void); /* Begin SNTP */