diff options
Diffstat (limited to 'libc/sysdeps/linux/c6x/_vfork.S')
| -rw-r--r-- | libc/sysdeps/linux/c6x/_vfork.S | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/c6x/_vfork.S b/libc/sysdeps/linux/c6x/_vfork.S new file mode 100644 index 000000000..d64dc504d --- /dev/null +++ b/libc/sysdeps/linux/c6x/_vfork.S @@ -0,0 +1,66 @@ +/* + * Port of uClibc for TMS320C6000 DSP architecture + * Copyright (C) 2004, 2011 Texas Instruments Incorporated + * Author of TMS320C6000 port: Aurelien Jacquiot + * + * Use clone syscall: Mark Salter <msalter@redhat.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU Library General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License + * for more details. + * + * You should have received a copy of the GNU Library General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#define __ASSEMBLY__ + +#include <asm/errno.h> +#include <sys/syscall.h> +#include <linux/sched.h> +#include <asm/signal.h> + +#define CLONE_FLAGS (CLONE_VFORK | CLONE_VM | SIGCHLD) + + .global __vfork +__vfork: + MVK .S2 SYS_clone,B0 + || MVKL .S1 CLONE_FLAGS,A4 + MVKH .S1 CLONE_FLAGS,A4 + || MVK .L2 0,B4 +#ifndef _TMS320C6400_PLUS + MVC .S2 CSR,B2 + CLR .S2 B2,0,0,B1 + MVC .S2 B1,CSR + MVC .S2 IFR,B1 + SET .S2 B1,6,6,B1 + MVC .S2 B1,ISR + MVC .S2 B2,CSR + NOP +#else + SWE +#endif + + MVK .S2 -4096,B4 + CMPGTU .L2X B4,A4,B2 ; check error + [B2] BNOP .S2 B3,5 + + NEG .S1 A4,A4 + STW .D2T1 A4,*B15--[2] + STW .D2T2 B3,*+B15[1] + CALLP .S2 __errno_location,B3 + LDW .D2T2 *+B15[1],B3 + LDW .D2T1 *++B15[2],A5 + NOP 3 + BNOP .S2 B3,3 + STW .D1T1 A5,*A4 + MVK .L1 -1,A4 + +weak_alias(__vfork,vfork) +libc_hidden_weak(vfork) |