编译linux内核生成的system.map文件详解

system.map内容格式为：线性地址 类型 符号
具体内容如下：
00100000 A phys_startup_32
c0100000 T startup_32
c0100000 A _text                             注:表示内核代码第一个字节的地址
c01000c6 t checkCPUtype
c0100147 t is486
c010014e t is386
c0100199 t L6
c010019b t check_x87
c01001c2 t setup_idt
c01001df t rp_sidt
c01001ec t ignore_int
c0100220 t rest_init
c0100220 T stext
c0100220 T _stext
c0100252 t do_pre_smp_initcalls
c0100257 t run_init_process
c0100283 t init
c01003a8 t try_name
c0100529 T name_to_dev_t
c0100790 t calibrate_delay_direct
...
c02f95d7 T register_kretprobe
c02f96cd T unregister_kretprobe
c02f9760 t .text.lock.kprobes
c02f97b0 T __kprobes_text_end
c02f9abe t iret_exc
c02fa1af A _etext                              注:内核代码结束的位置，之后为内核初始化的数据
c02fa1b0 A __start___ex_table
c02facc0 A __stop___ex_table
c02fb000 r __func__.12
c02fb000 A __start_rodata
c02fb00c r __func__.13
c02fb020 r __func__.2
c02fb02c r __func__.3
c02fb040 R linux_banner
c02fb0bb r __func__.0
c02fb0c7 r __func__.1
c02fb0e0 r __func__.0
c02fb0ec r __func__.1
c02fb100 r border
c02fb160 r cplens
...
c03e1b08 D ip_statistics
c03e1b10 D tcp_statistics
c03e1b18 D udp_statistics
c03e1b20 D icmp_statistics
c03e1b28 D net_statistics
c03e1b30 d fn_hash_kmem
c03e1b34 d fn_alias_kmem
c03e1b38 d xfrm_dst_cache
c03e1b3c d secpath_cachep
c03e1b40 A _edata                       注:内核初始化数据结束，之后为未初始化数据
c03e2000 D init_thread_union
c03e4000 A __init_begin
c03e4000 t no_halt
c03e4000 T _sinittext
c03e400d t mca_pentium
c