我理解rwxps位的含义. r-xp用于.text. rw -p用于.data / .bss / heap / stack.只是— p页有什么用？
例如,请参阅cat / proc / self / maps的此输出
00400000-0040b000 r-xp 00000000 08:03 827490 /bin/cat 0060b000-0060c000 rw-p 0000b000 08:03 827490 /bin/cat 0060c000-0062d000 rw-p 00000000 00:00 0 [heap] 3819a00000-3819a1e000 r-xp 00000000 08:03 532487 /lib64 ld-2.11.2.so 3819c1d000-3819c1e000 r--p 0001d000 08:03 532487 /lib64/ld-2.11.2.so 3819c1e000-3819c1f000 rw-p 0001e000 08:03 532487 /lib64/ld-2.11.2.so 3819c1f000-3819c20000 rw-p 00000000 00:00 0 3819e00000-3819f70000 r-xp 00000000 08:03 532490 /lib64/libc-2.11.2.so 3819f70000-381a16f000 ---p 00170000 08:03 532490 /lib64/libc-2.11.2.so 381a16f000-381a173000 r--p 0016f000 08:03 532490 /lib64/libc-2.11.2.so 381a173000-381a174000 rw-p 00173000 08:03 532490 /lib64/libc-2.11.2.so 381a174000-381a179000 rw-p 00000000 00:00 0 7fb859c49000-7fb85fa7a000 r--p 00000000 08:03 192261 /usr/lib/locale/locale-archive 7fb85fa7a000-7fb85fa7d000 rw-p 00000000 00:00 0 7fb85fa95000-7fb85fa96000 rw-p 00000000 00:00 0 7fff64894000-7fff648a9000 rw-p 00000000 00:00 0 [stack] 7fff649ff000-7fff64a00000 r-xp 00000000 00:00 0 [vdso] ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
