https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66912
Bug ID: 66912
Summary: Copy relocation against protected symbol doesn't work
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: nsz at gcc dot gnu.org
Target Milestone: ---
same as bug 65248 but for arm and aarch64.
On aarch64, gcc -S -O -fpic compiles
__attribute__((visibility("protected"))) int n;
int f () { return n; }
into
f:
adrp x0, n
ldr w0, [x0, #:lo12:n]
ret
.size f, .-f
.protected n
.comm n,4,4
so the address of n is not loaded from GOT,
which means copy reloc against it in the main
executable won't work.
The expected code is
f:
adrp x0, :got:n
ldr x0, [x0, #:got_lo12:n]
ldr w0, [x0]
ret
