Messages in this thread | | | Date | Thu, 9 Jul 2009 18:50:47 +0800 (CST) | From | peter meng <> | Subject | Ask a question related Assemble and C revert within vmlinux ? |
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Hi
I compile the linux kernel with mips . Is there any tools let the Assemble code correspond to C code ? I mean Assemble line correspond to C line .
----------------cut from objdump -S vmlinux ---------------------- 801b5b40 <ip_rcv>: 801b5b40: 27bdffc0 addiu sp,sp,-64 801b5b44: afb00028 sw s0,40(sp) 801b5b48: afbf0038 sw ra,56(sp) 801b5b4c: afb30034 sw s3,52(sp) 801b5b50: afb20030 sw s2,48(sp) 801b5b54: afb1002c sw s1,44(sp) 801b5b58: 8c82006c lw v0,108(a0) 801b5b5c: 3c0300e0 lui v1,0xe0 801b5b60: 3c050060 lui a1,0x60 801b5b64: 00431024 and v0,v0,v1 801b5b68: 10450022 beq v0,a1,801b5bf4 <ip_rcv+0xb4> 801b5b6c: 00808021 move s0,a0 801b5b70: 3c128029 lui s2,0x8029 801b5b74: 8e42ef90 lw v0,-4208(s2) 801b5b78: 00808821 move s1,a0 801b5b7c: 8c430004 lw v1,4(v0) 801b5b80: 24630001 addiu v1,v1,1 801b5b84: ac430004 sw v1,4(v0) 801b5b88: 8c850078 lw a1,120(a0) 801b5b8c: 38a50001 xori a1,a1,0x1 801b5b90: 14a00027 bnez a1,801b5c30 <ip_rcv+0xf0> 801b5b94: 00000000 nop 801b5b98: 122000d6 beqz s1,801b5ef4 <ip_rcv+0x3b4> 801b5b9c: 02208021 move s0,s1 801b5ba0: 8e250058 lw a1,88(s1) ........ ----------------------ip_rcv source code ---------------
int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { struct iphdr *iph; u32 len;
/* When the interface is in promisc. mode, drop all the crap * that it receives, do not try to analyse it. */ if (skb->pkt_type == PACKET_OTHERHOST) goto drop;
IP_INC_STATS_BH(IPSTATS_MIB_INRECEIVES);
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) { IP_INC_STATS_BH(IPSTATS_MIB_INDISCARDS); goto out; }
if (!pskb_may_pull(skb, sizeof(struct iphdr))) goto inhdr_error;
iph = skb->nh.iph;
if (iph->ihl < 5 || iph->version != 4) goto inhdr_error;
if (!pskb_may_pull(skb, iph->ihl*4)) goto inhdr_error;
iph = skb->nh.iph; .............
Thanks a lot . Best Regards. Peter Meng
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