https://sourceware.org/bugzilla/show_bug.cgi?id=32572
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
[hjl@gnu-tgl-3 pr32572]$ cat x.s
.arch armv8-a
.text
.global _start
.type _start, %function
_start:
.cfi_startproc
hint 34 // bti c
b foo
.cfi_endproc
.size _start, .-_start
.section .note.GNU-stack,"",@progbits
.section .note.gnu.property,"a"
.align 3
.word 4
.word 16
.word 5
.string "GNU"
.word 3221225472
.word 4
.word 3
.align 3
[hjl@gnu-tgl-3 pr32572]$ cat foo.s
.arch armv8-a
.text
.global foo
.type foo, %function
foo:
.cfi_startproc
ret
.cfi_endproc
.size foo, .-foo
.section .note.GNU-stack,"",@progbits
[hjl@gnu-tgl-3 pr32572]$ make
./as -g -o x.o x.s
./as -g -o foo.o foo.s
./ld -shared -o libfoo.so foo.o
./ld -pie -z force-bti -Ttext-segment=0x0000000000400000 -o x x.o libfoo.so
[hjl@gnu-tgl-3 pr32572]$ ./objdump -dw x
x: file format elf64-littleaarch64
Disassembly of section .plt:
00000000004002f0 <.plt>:
4002f0: d503245f bti c
4002f4: a9bf7bf0 stp x16, x30, [sp, #-16]!
4002f8: f00000f0 adrp x16, 41f000 <_start+0x1ece0>
4002fc: f947fe11 ldr x17, [x16, #4088]
400300: 913fe210 add x16, x16, #0xff8
400304: d61f0220 br x17
400308: d503201f nop
40030c: d503201f nop
0000000000400310 <foo@plt>:
400310: 90000010 adrp x16, 400000 <.plt-0x2f0>
400314: 99000111 stlur w17, [x8]
400318: 91000210 add x16, x16, #0x0
40031c: d6000220 .inst 0xd6000220 ; undefined
Disassembly of section .text:
0000000000400320 <_start>:
400320: d503245f bti c
400324: 17fffffb b 400310 <foo@plt>
[hjl@gnu-tgl-3 pr32572]$
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