Powerpc -msecure-plt verification -

i trying compile -msecure-plt, , although compilation completing fine, when looking @ memory maps doesn't flag doing anything. assuming not doing because got , plt sections both still in rwxp segements.

dump of assembler code function main: 0x1000061c <+0>:     stwu    r1,-16(r1) 0x10000620 <+4>:     mflr    r0 0x10000624 <+8>:     stw     r0,20(r1) 0x10000628 <+12>:    stw     r31,12(r1) 0x1000062c <+16>:    mr      r31,r1 0x10000630 <+20>:    bl      0x1001096c <libfunc@plt> 0x10000634 <+24>:    mr      r10,r3 0x10000638 <+28>:    lis     r9,4096 0x1000063c <+32>:    addi    r3,r9,2048 0x10000640 <+36>:    mr      r4,r10 0x10000644 <+40>:    crclr   4*cr1+eq 0x10000648 <+44>:    bl      0x10010964 <printf@plt> => 0x1000064c <+48>:    li      r9,1 0x10000650 <+52>:    mr      r3,r9 0x10000654 <+56>:    addi    r11,r31,16 0x10000658 <+60>:    lwz     r0,4(r11) 0x1000065c <+64>:    mtlr    r0 0x10000660 <+68>:    lwz     r31,-4(r11) 0x10000664 <+72>:    mr      r1,r11 0x10000668 <+76>:    blr 

with /proc/<pid>/maps showing memory map of

00100000-00103000 r-xp 00000000 00:00 0          [vdso] 0fe40000-0ffb8000 r-xp 00000000 00:01 6285       /lib/libc-2.22.so 0ffb8000-0ffc7000 ---p 00178000 00:01 6285       /lib/libc-2.22.so 0ffc7000-0ffc9000 r--p 00177000 00:01 6285       /lib/libc-2.22.so 0ffc9000-0ffcd000 rwxp 00179000 00:01 6285       /lib/libc-2.22.so 0ffcd000-0ffcf000 rwxp 00000000 00:00 0 0ffdf000-0ffe0000 r-xp 00000000 00:01 5928       /lib/libmaintest.so 0ffe0000-0ffef000 ---p 00001000 00:01 5928       /lib/libmaintest.so 0ffef000-0fff0000 rwxp 00000000 00:01 5928       /lib/libmaintest.so 10000000-10001000 r-xp 00000000 00:01 5934       /root/main 10010000-10011000 rwxp 00000000 00:01 5934       /root/main b7860000-b7882000 r-xp 00000000 00:01 6240       /lib/ld-2.22.so b7890000-b7892000 rw-p 00000000 00:00 0 b7892000-b7893000 r--p 00022000 00:01 6240       /lib/ld-2.22.so b7893000-b7895000 rwxp 00023000 00:01 6240       /lib/ld-2.22.so bff1a000-bff3b000 rw-p 00000000 00:00 0          [stack] 

which sticks both of plot jumps right middle of rwx section. misinterpreting information?

i think might kernel limitation: see e.g. https://lkml.org/lkml/2016/8/8/354 - looks kernel maps things in ways wouldn't expect understand historical reasons.

it may changing soon, given patch above sent yesterday.