linux kernel struct 之 exec

linux-4.9.37/arch/x86/include/uappi/asm/a.out.h

用于在进程中加载和运行一个新的程序，替换当前进程的映像和执行环境。‌

struct exec
{
    unsigned int a_info;    /* Use macros N_MAGIC, etc for access */
    unsigned a_text;    /* length of text, in bytes */
    unsigned a_data;    /* length of data, in bytes */
    unsigned a_bss;        /* length of uninitialized data area for file, in bytes */
    unsigned a_syms;    /* length of symbol table data in file, in bytes */
    unsigned a_entry;    /* start address */
    unsigned a_trsize;    /* length of relocation info for text, in bytes */
    unsigned a_drsize;    /* length of relocation info for data, in bytes */
};