https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93197
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|REOPENED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Fixing PR 93195 will also fix this:
[hjl@gnu-cfl-1 pr93197]$ cat a.c
void foo() {}
[hjl@gnu-cfl-1 pr93197]$ cat b.c
extern void foo(void);
void
_start ()
{
foo ();
}
[hjl@gnu-cfl-1 pr93197]$ make
/export/build/gnu/tools-build/gcc-gitlab-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-gitlab-debug/build-x86_64-linux/gcc/
-fpatchable-function-entry=1 -S a.c
/export/build/gnu/tools-build/gcc-gitlab-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-gitlab-debug/build-x86_64-linux/gcc/
-fpatchable-function-entry=1 -S b.c
/export/build/gnu/tools-build/gcc-gitlab-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-gitlab-debug/build-x86_64-linux/gcc/
-fpatchable-function-entry=1 -c -o a.o a.s
/export/build/gnu/tools-build/gcc-gitlab-debug/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/tools-build/gcc-gitlab-debug/build-x86_64-linux/gcc/
-fpatchable-function-entry=1 -c -o b.o b.s
ld --gc-sections -o x a.o b.o
readelf -SW x | grep __patchable_function_entries
[ 4] __patchable_function_entries PROGBITS 0000000000404000 003000
000010 00 WAL 2 0 8
[hjl@gnu-cfl-1 pr93197]$ cat a.s
.file "a.c"
.text
.globl foo
.type foo, @function
foo:
.section __patchable_function_entries,"awo",@progbits,foo
.align 8
.quad .LPFE1
.text
.LPFE1:
nop
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
nop
popq %rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE0:
.size foo, .-foo
.ident "GCC: (GNU) 10.0.1 20200203 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 pr93197]$ cat b.s
.file "b.c"
.text
.globl _start
.type _start, @function
_start:
.section __patchable_function_entries,"awo",@progbits,_start
.align 8
.quad .LPFE1
.text
.LPFE1:
nop
.LFB0:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
call foo
nop
popq %rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
.LFE0:
.size _start, .-_start
.ident "GCC: (GNU) 10.0.1 20200203 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-cfl-1 pr93197]$
*** This bug has been marked as a duplicate of bug 93195 ***
