[PATCH] Call exit directly in clone (BZ #21512)

[Joseph Myers]

On Fri, 23 Jun 2017, Adhemerval Zanella wrote:

> diff --git a/sysdeps/unix/sysv/linux/arm/clone.S b/sysdeps/unix/sysv/linux/arm/clone.S

> @@ -76,7 +73,8 @@ PSEUDO_END (__clone)
>  	BLX (ip)
>  
>  	@ and we are done, passing the return value through r0
> -	b	PLTJMP(HIDDEN_JUMPTARGET(_exit))
> +	ldr	r7, =SYS_ify(clone)
> +	swi	0x0

This looks like it would call the clone syscall, not exit.

> diff --git a/sysdeps/unix/sysv/linux/mips/clone.S b/sysdeps/unix/sysv/linux/mips/clone.S

> @@ -137,14 +134,9 @@ L(thread_start):
>  	/* Call the user's function.  */
>  	jal		t9
>  
> -	/* Call _exit rather than doing it inline for breakpoint purposes.  */
>  	move		a0,v0
> -#ifdef __PIC__
> -	PTR_LA		t9,_exit
> -	jalr		t9
> -#else
> -	jal		_exit
> -#endif
> +	li		v0,__NR_clone
> +	syscall

Likewise.

-- 
Joseph S. Myers
joseph@codesourcery.com