Displaying 4 results from an estimated 4 matches for "__stderr_used".
2013 Jan 09
0
[LLVMdev] [lld] ELF weak aliases
...it, and
so as the ordinal too riht ?
Couldnt follow how did the others move ?
This is what I see with binutils/ld :-
$cat 1.c
#include "stdio_impl.h"
static FILE *const dummy_file = 0;
weak_alias(dummy_file, __stdin_used);
weak_alias(dummy_file, __stdout_used);
weak_alias(dummy_file, __stderr_used);
$cat 2.c
int __stdout_used = 10;
$readelf -s 1.o | grep -E 'used|dummy_file'
6: 0000000000000000 8 OBJECT LOCAL DEFAULT 4 dummy_file
9: 0000000000000000 8 OBJECT WEAK DEFAULT 4 __stdin_used
10: 0000000000000000 8 OBJECT WEAK DEFAULT 4 __stdout_u...
2013 Jan 09
4
[LLVMdev] [lld] ELF weak aliases
...ge to hack around incorrect handling
of ELF weak aliases.
In musl __stdio_exit.c
<http://git.musl-libc.org/cgit/musl/tree/src/stdio/__stdio_exit.c> we
have:
static FILE *const dummy_file = 0;
weak_alias(dummy_file, __stdin_used);
weak_alias(dummy_file, __stdout_used);
weak_alias(dummy_file, __stderr_used);
weak_alias(old, new) is defined as: extern __typeof(old) new
__attribute__((weak, alias(#old)))
This generates the following object file:
mspencer at mspencer-vm:~/Projects/test$ objdump -st
../musl/src/stdio/__stdio_exit.o
../musl/src/stdio/__stdio_exit.o: file format elf64-x86-64
SYMBOL...
2013 Jan 09
2
[LLVMdev] [lld] ELF weak aliases
...quite sure what you mean here.
>
> This is what I see with binutils/ld :-
>
> $cat 1.c
> #include "stdio_impl.h"
>
> static FILE *const dummy_file = 0;
> weak_alias(dummy_file, __stdin_used);
> weak_alias(dummy_file, __stdout_used);
> weak_alias(dummy_file, __stderr_used);
>
> $cat 2.c
> int __stdout_used = 10;
> $readelf -s 1.o | grep -E 'used|dummy_file'
> 6: 0000000000000000 8 OBJECT LOCAL DEFAULT 4 dummy_file
> 9: 0000000000000000 8 OBJECT WEAK DEFAULT 4 __stdin_used
> 10: 0000000000000000 8 OBJE...
2013 Jan 09
0
[LLVMdev] [lld] ELF weak aliases
...eak aliases.
>
> In musl __stdio_exit.c
> <http://git.musl-libc.org/cgit/musl/tree/src/stdio/__stdio_exit.c> we
> have:
>
> static FILE *const dummy_file = 0;
> weak_alias(dummy_file, __stdin_used);
> weak_alias(dummy_file, __stdout_used);
> weak_alias(dummy_file, __stderr_used);
>
> weak_alias(old, new) is defined as: extern __typeof(old) new
> __attribute__((weak, alias(#old)))
>
> This generates the following object file:
> mspencer at mspencer-vm:~/Projects/test$ objdump -st
> ../musl/src/stdio/__stdio_exit.o
>
> ../musl/src/stdio/__stdio...