On Thu, Aug 06, 2015 at 12:35:30PM +0800, Wangnan (F) wrote:
>
>
> On 2015/8/6 11:22, Alexei Starovoitov wrote:
> >On Wed, Aug 05, 2015 at 04:28:13PM +0800, Wangnan (F) wrote:
> >>It doesn't work for me at first since in my llvm there's only
> >>llvm.bpf.load.*.
> >>
> >>I think llvm.bpf.store.*
On Thu, Aug 06, 2015 at 12:31:26PM +0800, Wangnan (F) wrote:
>
>
> What about hacking ELF binary in memory?
>
> 1. load the object into memory;
> 2. twist the machine code to EM_X86_64;
> 3. load it using elf_begin;
> 4. return the twested elf memory image using libdwfl's find_elf callback.
>
On Thu, Aug 06, 2015 at 12:35:30PM +0800, Wangnan (F) wrote:
On 2015/8/6 11:22, Alexei Starovoitov wrote:
On Wed, Aug 05, 2015 at 04:28:13PM +0800, Wangnan (F) wrote:
It doesn't work for me at first since in my llvm there's only
llvm.bpf.load.*.
I think llvm.bpf.store.* belone to some
On Thu, Aug 06, 2015 at 12:31:26PM +0800, Wangnan (F) wrote:
What about hacking ELF binary in memory?
1. load the object into memory;
2. twist the machine code to EM_X86_64;
3. load it using elf_begin;
4. return the twested elf memory image using libdwfl's find_elf callback.
Then
On 2015/8/6 11:22, Alexei Starovoitov wrote:
On Wed, Aug 05, 2015 at 04:28:13PM +0800, Wangnan (F) wrote:
It doesn't work for me at first since in my llvm there's only
llvm.bpf.load.*.
I think llvm.bpf.store.* belone to some patches you haven't posted yet?
nope. only loads have special
On 2015/8/6 11:41, Alexei Starovoitov wrote:
On Wed, Aug 05, 2015 at 04:59:01PM +0800, He Kuang wrote:
Hi, Alexei
On 2015/7/30 1:13, Alexei Starovoitov wrote:
On 7/29/15 2:38 AM, He Kuang wrote:
Hi, Alexei
On 2015/7/28 10:18, Alexei Starovoitov wrote:
On 7/25/15 3:04 AM, He Kuang wrote:
On Wed, Aug 05, 2015 at 04:59:01PM +0800, He Kuang wrote:
> Hi, Alexei
>
> On 2015/7/30 1:13, Alexei Starovoitov wrote:
> >On 7/29/15 2:38 AM, He Kuang wrote:
> >>Hi, Alexei
> >>
> >>On 2015/7/28 10:18, Alexei Starovoitov wrote:
> >>>On 7/25/15 3:04 AM, He Kuang wrote:
> I noticed that for
On Wed, Aug 05, 2015 at 04:28:13PM +0800, Wangnan (F) wrote:
>
> It doesn't work for me at first since in my llvm there's only
> llvm.bpf.load.*.
>
> I think llvm.bpf.store.* belone to some patches you haven't posted yet?
nope. only loads have special instructions ld_abs/ld_ind
which are
Hi, Alexei
On 2015/7/30 1:13, Alexei Starovoitov wrote:
On 7/29/15 2:38 AM, He Kuang wrote:
Hi, Alexei
On 2015/7/28 10:18, Alexei Starovoitov wrote:
On 7/25/15 3:04 AM, He Kuang wrote:
I noticed that for 64-bit elf format, the reloc sections have
'Addend' in the entry, but there's no
On 2015/8/5 15:11, Alexei Starovoitov wrote:
On 8/4/15 11:51 PM, Wangnan (F) wrote:
void bpf_store_half(void *skb, int off, int val)
asm("llvm.bpf.store.half");
int func()
{
bpf_store_half(0, 0, 0);
return 0;
}
Compiled with:
$ clang -g -target bpf -O2 -S -c test.c
And
On 8/4/15 11:51 PM, Wangnan (F) wrote:
void bpf_store_half(void *skb, int off, int val)
asm("llvm.bpf.store.half");
int func()
{
bpf_store_half(0, 0, 0);
return 0;
}
Compiled with:
$ clang -g -target bpf -O2 -S -c test.c
And get this:
.text
.globl func
On 2015/8/5 10:05, Wangnan (F) wrote:
Send again since llvmdev is moved to llvm-...@lists.llvm.org
On 2015/8/5 9:58, Wangnan (F) wrote:
On 2015/8/4 3:44, Alexei Starovoitov wrote:
On 7/31/15 3:18 AM, Wangnan (F) wrote:
[SNIP]
didn't have time to look at it.
from your llvm patches
On 2015/8/5 10:05, Wangnan (F) wrote:
Send again since llvmdev is moved to llvm-...@lists.llvm.org
On 2015/8/5 9:58, Wangnan (F) wrote:
On 2015/8/4 3:44, Alexei Starovoitov wrote:
On 7/31/15 3:18 AM, Wangnan (F) wrote:
[SNIP]
didn't have time to look at it.
from your llvm patches
On 8/4/15 11:51 PM, Wangnan (F) wrote:
void bpf_store_half(void *skb, int off, int val)
asm(llvm.bpf.store.half);
int func()
{
bpf_store_half(0, 0, 0);
return 0;
}
Compiled with:
$ clang -g -target bpf -O2 -S -c test.c
And get this:
.text
.globl func
On 2015/8/5 15:11, Alexei Starovoitov wrote:
On 8/4/15 11:51 PM, Wangnan (F) wrote:
void bpf_store_half(void *skb, int off, int val)
asm(llvm.bpf.store.half);
int func()
{
bpf_store_half(0, 0, 0);
return 0;
}
Compiled with:
$ clang -g -target bpf -O2 -S -c test.c
And get
Hi, Alexei
On 2015/7/30 1:13, Alexei Starovoitov wrote:
On 7/29/15 2:38 AM, He Kuang wrote:
Hi, Alexei
On 2015/7/28 10:18, Alexei Starovoitov wrote:
On 7/25/15 3:04 AM, He Kuang wrote:
I noticed that for 64-bit elf format, the reloc sections have
'Addend' in the entry, but there's no
On 2015/8/6 11:22, Alexei Starovoitov wrote:
On Wed, Aug 05, 2015 at 04:28:13PM +0800, Wangnan (F) wrote:
It doesn't work for me at first since in my llvm there's only
llvm.bpf.load.*.
I think llvm.bpf.store.* belone to some patches you haven't posted yet?
nope. only loads have special
On Wed, Aug 05, 2015 at 04:59:01PM +0800, He Kuang wrote:
Hi, Alexei
On 2015/7/30 1:13, Alexei Starovoitov wrote:
On 7/29/15 2:38 AM, He Kuang wrote:
Hi, Alexei
On 2015/7/28 10:18, Alexei Starovoitov wrote:
On 7/25/15 3:04 AM, He Kuang wrote:
I noticed that for 64-bit elf format, the
On Wed, Aug 05, 2015 at 04:28:13PM +0800, Wangnan (F) wrote:
It doesn't work for me at first since in my llvm there's only
llvm.bpf.load.*.
I think llvm.bpf.store.* belone to some patches you haven't posted yet?
nope. only loads have special instructions ld_abs/ld_ind
which are represented
On 2015/8/6 11:41, Alexei Starovoitov wrote:
On Wed, Aug 05, 2015 at 04:59:01PM +0800, He Kuang wrote:
Hi, Alexei
On 2015/7/30 1:13, Alexei Starovoitov wrote:
On 7/29/15 2:38 AM, He Kuang wrote:
Hi, Alexei
On 2015/7/28 10:18, Alexei Starovoitov wrote:
On 7/25/15 3:04 AM, He Kuang wrote:
Send again since llvmdev is moved to llvm-...@lists.llvm.org
On 2015/8/5 9:58, Wangnan (F) wrote:
On 2015/8/4 17:01, Wangnan (F) wrote:
For people who in llvmdev:
This mail is belong to a thread in linux kernel mailing list, the
first message
can be retrived from:
On 2015/8/4 17:01, Wangnan (F) wrote:
For people who in llvmdev:
This mail is belong to a thread in linux kernel mailing list, the
first message
can be retrived from:
http://lkml.kernel.org/r/55b1535e.8090...@plumgrid.com
Our goal is to fild a way to make BPF program get an unique ID for
For people who in llvmdev:
This mail is belong to a thread in linux kernel mailing list, the first
message
can be retrived from:
http://lkml.kernel.org/r/55b1535e.8090...@plumgrid.com
Our goal is to fild a way to make BPF program get an unique ID for each type
so it can pass the ID to other
For people who in llvmdev:
This mail is belong to a thread in linux kernel mailing list, the first
message
can be retrived from:
http://lkml.kernel.org/r/55b1535e.8090...@plumgrid.com
Our goal is to fild a way to make BPF program get an unique ID for each type
so it can pass the ID to other
Send again since llvmdev is moved to llvm-...@lists.llvm.org
On 2015/8/5 9:58, Wangnan (F) wrote:
On 2015/8/4 17:01, Wangnan (F) wrote:
For people who in llvmdev:
This mail is belong to a thread in linux kernel mailing list, the
first message
can be retrived from:
On 2015/8/4 17:01, Wangnan (F) wrote:
For people who in llvmdev:
This mail is belong to a thread in linux kernel mailing list, the
first message
can be retrived from:
http://lkml.kernel.org/r/55b1535e.8090...@plumgrid.com
Our goal is to fild a way to make BPF program get an unique ID for
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