增加或删除一个线性区 (a)Access rights of interval to be added are equal to those of contiguous (a')The exsiting region is enlarged region (b)Access rights of interval to be added are different fron those of contiguous region (b')A new memory region is created 4400000090 4o4c (c)Interval to be removed is at the end of (c')The existing region is shortened existing region 400144400g4n00141000440004490:4490044g0044g0004440 444444444444444444▣444444 (d)Interval to be removed is inside existing region (d')Two smaller regions are created Adress space before operation Address space after operation 陈香兰(xlanchenoustc,du.cn)(计界丸应L1nux操作看统分析Chapter】8 Linux中约过有 January 14.2015 9/28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 增加或删除一个线性区 (a) Access rights of interval to be added are equal to those of contiguous region (a’) The exsiting region is enlarged (b) Access rights of interval to be added are different from those of contiguous region (b’) A new memory region is created (c) Interval to be removed is at the end of existing region (c’) The existing region is shortened (d) Interval to be removed is inside existing region (d’) Two smaller regions are created Adress space before operation Address space after operation 陈香兰（xlanchen@ustc.edu.cn） (计算机应用教研室 Linux操作系统分析Chapter 18 Linux中的进程地址空间(arm) @计算机学院嵌入式系统实验室@苏州研究院中国科学技术大学Fall 2014) January 14, 2015 9 / 28