Messages in this thread | | | Date | Thu, 9 Jul 2009 14:49:09 +0200 | From | Jiri Olsa <> | Subject | Re: Ask a question related Assemble and C revert within vmlinux ? |
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On Thu, Jul 09, 2009 at 06:50:47PM +0800, peter meng wrote: > > 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 .
not sure about mips, but for x86: objdump -S ./ex.o
you need to have debug info compiled in..
jirka
> > > > ----------------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 > > > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/
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