bpf_printk("topts:%s:opsize(%d)\n",topt->opname,opsize); break; case2+1: if(__check(data,data_end,1)) bpf_printk("topts:%s:opsize(%d),val:%d\n", topt->opname,opsize,*(__u8*)data); break; case2+2: if(__check(data,data_end,2)) bpf_printk("topts:%s:opsize(%d)...
int pid = bpf_get_current_pid_tgid >> 32; bpf_probe_read(&cookie, 8, (unsigned long*)PT_REGS_SP(ctx) + 1); bpf_get_current_comm(comm, sizeof(comm)); bpf_trace_printk("pid is:%d, comm is: %s\\n", pid, comm); bpf_trace_printk("cookie is %d, file is: %s\\n", cooki...
Currently adding to pointers doesn't work: stdin:1:37-38: ERROR: The + operator can not be used on expressions of types cast, integer BEGIN { $a = (uint16*) 123; $b = $a + 5; } In C adding to a pointer uses the pointee size to increment,...
https://github.com/nevermosby/linux-bpf-learning nevermosby 2020/05/11 11K6 使用MCUXpresso IDE将数据、函数与文件存入指定位置 ide变量函数数据数组 在进行MCU开发时,根据实际需要,将数据、函数与文件存入指定位置,对合理使用存储器的十分重要。经常有客户问如何将某一数据、函数或文件存入指定的地址空间,结合客...
Provide a __retain macro implementing __attribute__((__retain__)), whose first user will be the '__bpf_kfunc' tag. [ Additional remark from discussion: Why is CONFIG_LTO_CLANG added here? The __used macro permits garbage collection at section level, so CLANG_LTO_CLANG without CONFI...
介绍BTF(BPF Type Format)是内嵌在BPF(Berkeley Packet Filter)程序中的数据结构描述信息。...在eBPF程序开发过程中,用户通常会在用户空间编写C代码,然后使用特定的编译器(如clang)编译这些代码为eBPF字节码。...内核在使用之前使用 BTF 信息对其进行验证。ELF 文件格式是一个用户空间 ELF 文件和 libbpf 加载器...
The BPF will run a two-day conference in April designed to bring together industry representatives and government figures to put the future and potential needs of the sector in the spotlight. The one-off event, which takes place on 10 and 11 April, includes a keynote address by parliamentary...
BCC 中使用如下的代码对用户写的 BPF text 进行 rewrite ,覆盖的参数刚好是前 6 个参数,分别保存于 di, si, dx, cx, r8, r9 寄存器: constchar*calling_conv_regs_x86[] = { "di","si","dx","cx","r8","r9" }; voidBTypeVisitor::genParamDirectAssign(FunctionDecl *D,string& preamble, ...
To enable rcu tagging in BTF, during kernel compilation, define __rcu as attribute btf_type_tag("rcu") so __rcu information can be preserved in dwarf and btf, and later can be used for bpf prog verification. Acked-by: KP Singh <kpsingh@kernel.org> Acked-by: Martin KaFai Lau <...
To enable rcu tagging in BTF, during kernel compilation, define __rcu as attribute btf_type_tag("rcu") so __rcu information can be preserved in dwarf and btf, and later can be used for bpf prog verification. Acked-by: KP Singh <kpsingh@kernel.org> Acked-by: Martin KaFai Lau <...