https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82659
Bug ID: 82659
Summary: Unnecessary ENDBR in static/local functions
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: igor.v.tsimbalist at intel dot com
Blocks: 81652
Target Milestone: ---
Since the address of the static function, test, is never taken, there
is no need for ENDBR:
[hjl@gnu-tools-1 cet-4]$ cat x.i
extern int x;
static void
__attribute__ ((noinline, noclone))
test (int i)
{
x = i;
}
void
bar (int i)
{
test (i);
}
[hjl@gnu-tools-1 cet-4]$ make
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -fcf-protection=full -mcet -O2
-S x.i
[hjl@gnu-tools-1 cet-4]$ cat x.s
.file "x.i"
.text
.p2align 4,,15
.type test, @function
test:
.LFB0:
.cfi_startproc
endbr64
^^^^^^^^^^^^^^^^^^ Not needed.
movl %edi, x(%rip)
ret
.cfi_endproc
.LFE0:
.size test, .-test
.p2align 4,,15
.globl bar
.type bar, @function
bar:
.LFB1:
.cfi_startproc
endbr64
jmp test
.cfi_endproc
.LFE1:
.size bar, .-bar
.ident "GCC: (GNU) 8.0.0 20171022 (experimental)"
.section .note.GNU-stack,"",@progbits
.section .note.gnu.property,"a"
.align 8
.long 1f - 0f
.long 4f - 1f
.long 5
0:
.string "GNU"
1:
.align 8
.long 0xc0000002
.long 3f - 2f
2:
.long 0x3
3:
.align 8
4:
[hjl@gnu-tools-1 cet-4]$
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81652
[Bug 81652] [meta-bug] -fcf-protection=full -mcet bugs
