https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89353
Bug ID: 89353
Summary: Unnecessary ENDBR with -mmanual-endbr
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
[hjl@gnu-mic-2 gcc]$ cat x.c
#ifdef FOO
__attribute__ ((cf_check))
#endif
int test(int* val)
{
int status = 99;
if((val == 0))
{
status = 22;
goto end;
}
extern int x;
*val = x;
status = 0;
end:
return status;
}
[hjl@gnu-mic-2 gcc]$ ./xgcc -B./ -m32 -O2 -fcf-protection x.c -S -mmanual-endbr
[hjl@gnu-mic-2 gcc]$ cat x.s
.file "x.c"
.text
.p2align 4
.globl test
.type test, @function
test:
.LFB0:
.cfi_startproc
movl 4(%esp), %eax
testl %eax, %eax
je .L3
movl x, %edx
movl %edx, (%eax)
xorl %eax, %eax
ret
.p2align 4,,10
.p2align 3
.L3:
.L2:
endbr32 <<<<<<<< This should be there.
movl $22, %eax
ret
.cfi_endproc
.LFE0:
.size test, .-test
.ident "GCC: (GNU) 9.0.1 20190214 (experimental)"
.section .note.GNU-stack,"",@progbits
.section .note.gnu.property,"a"
.align 4
.long 1f - 0f
.long 4f - 1f
.long 5
0:
.string "GNU"
1:
.align 4
.long 0xc0000002
.long 3f - 2f
2:
.long 0x3
3:
.align 4
4:
[hjl@gnu-mic-2 gcc]$
