?? ea.c
字號:
/* * linux/kernel/math/ea.c * * (C) 1991 Linus Torvalds *//* * Calculate the effective address. */#include <stddef.h>#include <linux/math_emu.h>#include <asm/segment.h>static int __regoffset[] = { offsetof(struct info,___eax), offsetof(struct info,___ecx), offsetof(struct info,___edx), offsetof(struct info,___ebx), offsetof(struct info,___esp), offsetof(struct info,___ebp), offsetof(struct info,___esi), offsetof(struct info,___edi)};#define REG(x) (*(long *)(__regoffset[(x)]+(char *) info))static char * sib(struct info * info, int mod){ unsigned char ss,index,base; long offset = 0; base = get_fs_byte((char *) EIP); EIP++; ss = base >> 6; index = (base >> 3) & 7; base &= 7; if (index == 4) offset = 0; else offset = REG(index); offset <<= ss; if (mod || base != 5) offset += REG(base); if (mod == 1) { offset += (signed char) get_fs_byte((char *) EIP); EIP++; } else if (mod == 2 || base == 5) { offset += (signed) get_fs_long((unsigned long *) EIP); EIP += 4; } I387.foo = offset; I387.fos = 0x17; return (char *) offset;}char * ea(struct info * info, unsigned short code){ unsigned char mod,rm; long * tmp = &EAX; int offset = 0; mod = (code >> 6) & 3; rm = code & 7; if (rm == 4 && mod != 3) return sib(info,mod); if (rm == 5 && !mod) { offset = get_fs_long((unsigned long *) EIP); EIP += 4; I387.foo = offset; I387.fos = 0x17; return (char *) offset; } tmp = & REG(rm); switch (mod) { case 0: offset = 0; break; case 1: offset = (signed char) get_fs_byte((char *) EIP); EIP++; break; case 2: offset = (signed) get_fs_long((unsigned long *) EIP); EIP += 4; break; case 3: math_abort(info,1<<(SIGILL-1)); } I387.foo = offset; I387.fos = 0x17; return offset + (char *) *tmp;}?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -