关键就在这其中的bit-field是如何解释成-14和-2的。 从结果来看,可以知道:bitstruct的3个field都在同一个存储单元内,并且由于x86是little-endian的,数据从内存读到寄存器之后字节序就反了过来,高位字节到低位字节的顺序是“从右向左”;对应的,解释bitstruct中的各field时也从右向左来读。 寄存器中的b: 'n' ...
二、struct iphdr 结构体 1structiphdr {2#ifdefined(__LITTLE_ENDIAN_BITFIELD)3__u8 ihl:4,4version:4;5#elifdefined (__BIG_ENDIAN_BITFIELD)6__u8 version:4,7ihl:4;8#else9#error"Please fix <asm/byteorder.h>"10#endif11__u8 tos;12__be16 tot_len;13__be16 id;14__be16 frag_off;...
When a value is stored in an object of structure or union type, including a case as part of a value of a union type, the bytes of the object representation shall be written in order with the values of the members given in increasing bit-field order, with implementa...
1. 基本解释 typedef为C语言的关键字，作用是为一种数据类型定义一个新名字。这里的数据类型包括内...
task_pid() and task_tid() –- ID of the process ID (stored in tgid field) and thread (stored in pid field) respectively. Note that kernel most of the kernel code doesn't check cached pid and...
structiphdr {#ifdefined(__LITTLE_ENDIAN_BITFIELD)__u8 ihl:4, version:4;#elifdefined (__BIG_ENDIAN_BITFIELD)__u8 version:4, ihl:4;#else#error"Please fix <asm/byteorder.h>"#endif__u8 tos; __be16-tot_len; __be16-id; __be16-frag_off; ...
* Indicates order in the buddy system if PageBuddy. */ unsigned long private; }; struct { /* page_pool used by netstack */ /** * @dma_addr: might require a 64-bit value even on * 32-bit architectures. */ dma_addr_t dma_addr; ...
Represents an unsigned integer where the bit-width is the same as a pointer.C# Copy [System.CLSCompliant(false)] public readonly struct UIntPtr : IComparable<UIntPtr>, IEquatable<UIntPtr>, IParsable<UIntPtr>, ISpanParsable<UIntPtr>, IUtf8SpanParsable<UIntPtr>, System.Numerics.IAddition...
Represents a signed integer where the bit-width is the same as a pointer. C# Copy public readonly struct IntPtr : IComparable<IntPtr>, IEquatable<IntPtr>, IParsable<IntPtr>, ISpanParsable<IntPtr>, IUtf8SpanParsable<IntPtr>, System.Numerics.IAdditionOperators<IntPtr,IntPtr,IntPtr>, Sys...
* Indicates order in the buddy system if PageBuddy. */ unsigned long private; }; struct { /* page_pool used by netstack */ /** * @dma_addr: might require a 64-bit value even on * 32-bit architectures. */ dma_addr_t dma_addr; ...