Displaying 3 results from an estimated 3 matches for "bpf_store_half".
2015 Aug 05
2
[LLVMdev] Cc llvmdev: Re: llvm bpf debug info. Re: [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event
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
>...
2015 Aug 05
2
[LLVMdev] Cc llvmdev: Re: llvm bpf debug info. Re: [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event
...ing
>> in it. However
>> I'm not sure whether the prerequestion is hold.
>>
>>> patch 2:
>>> do we really need to hack clang?
>>> Can you just define a function that aliases to intrinsic,
>>> like we do for ld_abs/ld_ind ?
>>> void bpf_store_half(void *skb, u64 off, u64 val)
>>> asm("llvm.bpf.store.half");
>>> then no extra patches necessary.
>>>
>>>> struct my_str {
>>>> int x;
>>>> int y;
>>>> };
>>>> struct my_str __str_my_...
llvm bpf debug info. Re: [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event
2015 Aug 12
2
llvm bpf debug info. Re: [RFC PATCH v4 3/3] bpf: Introduce function for outputing data to perf event
...y replying this mail. Please have a look and
>> help me
>> send them to LLVM if you think my code is correct.
>
>
[SNIP]
> patch 2:
> do we really need to hack clang?
> Can you just define a function that aliases to intrinsic,
> like we do for ld_abs/ld_ind ?
> void bpf_store_half(void *skb, u64 off, u64 val)
> asm("llvm.bpf.store.half");
> then no extra patches necessary.
Hi Alexei,
By two weeks researching, I have to give you a sad answer that:
target specific intrinsic is not work.
I tried target specific intrinsic. However, LLVM isolates backend and...