diff options
| -rw-r--r-- | libc/sysdeps/linux/microblaze/Makefile.arch | 4 | ||||
| -rw-r--r-- | libc/sysdeps/linux/microblaze/clone.S | 78 | ||||
| -rw-r--r-- | libc/sysdeps/linux/microblaze/clone.c | 47 | ||||
| -rw-r--r-- | libc/sysdeps/linux/microblaze/vfork.S | 17 |
4 files changed, 86 insertions, 60 deletions
diff --git a/libc/sysdeps/linux/microblaze/Makefile.arch b/libc/sysdeps/linux/microblaze/Makefile.arch index 6f1e9fb3d..e23515ed0 100644 --- a/libc/sysdeps/linux/microblaze/Makefile.arch +++ b/libc/sysdeps/linux/microblaze/Makefile.arch @@ -5,5 +5,5 @@ # # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. -CSRC-y := clone.c -SSRC-y := setjmp.S __longjmp.S vfork.S +CSRC-y := +SSRC-y := setjmp.S __longjmp.S vfork.S clone.S diff --git a/libc/sysdeps/linux/microblaze/clone.S b/libc/sysdeps/linux/microblaze/clone.S new file mode 100644 index 000000000..46d4fe6b4 --- /dev/null +++ b/libc/sysdeps/linux/microblaze/clone.S @@ -0,0 +1,78 @@ +/* Copyright (C) 1996-2016 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +/* clone() is even more special than fork() as it mucks with stacks + and invokes a function in the right context after its all over. */ + +#include <sysdep.h> +#define _ERRNO_H 1 +#include <bits/errno.h> + +/* int clone (int (*fn)(void *arg), void *child_stack, int flags, void *arg, + pid_t *ptid, struct user_desc *tls, pid_t *ctid); + + INCOMING: r5 (fn), r6 (child_stack), r7 (flags), r8 (arg), r9 (ptid) + r10 (tls), 28 (r1) ctid + + OUTGOING: + + linux: arch/microblaze/entry.S: sys_clone expects + r5 (flags) r6 (child stack) r7 (stack_size) r8 (ptid)r9 (ctid) + r10 (tls) +*/ + + .text +ENTRY (__clone) + addik r3,r0,-EINVAL + beqi r5,1f ; // Invalid func + beqi r6,1f ; // Invalid stack + addik r6,r6,-8 + swi r5,r6,0 ; // Push fn onto child's stack + swi r8,r6,4 ; // Push arg for child + addk r5,r0,r7 ; // flags for clone() syscall + addk r7,r0,r0 + addk r8,r0,r9 ; // parent tid ptr + lwi r9,r1,28 ; // child tid ptr + addik r12,r0,SYS_ify(clone) + brki r14,8 + addk r0,r0,r0 + addik r4,r0,-4095 + cmpu r4,r4,r3 + bgei r4,1f + beqi r3,L(thread_start) + rtsd r15,8 + nop + +L(thread_start): + lwi r12,r1,0 ; // fn + lwi r5,r1,4 ; // arg + brald r15,r12 + nop + addk r5,r0,r3 + addik r12,r0,SYS_ify(exit) + brki r14,8 + nop + +1: rsubk r3,r3,r0 + rtsd r15,8 + addik r3,r0,-1 /* delay slot. */ + +END(__clone) + +libc_hidden_def (__clone) +weak_alias (__clone,clone) diff --git a/libc/sysdeps/linux/microblaze/clone.c b/libc/sysdeps/linux/microblaze/clone.c deleted file mode 100644 index d92100865..000000000 --- a/libc/sysdeps/linux/microblaze/clone.c +++ /dev/null @@ -1,47 +0,0 @@ -/* - * Copyright (C) 2004 Atmel Corporation - * - * This file is subject to the terms and conditions of the GNU Lesser General - * Public License. See the file "COPYING.LIB" in the main directory of this - * archive for more details. - */ -#include <sched.h> -#include <errno.h> -#include <sys/syscall.h> -#include <unistd.h> - -int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, ...) -{ - int rval = -EINVAL; - if (fn && child_stack) - rval = INTERNAL_SYSCALL(clone, 0, 2, flags, child_stack); - - if (rval == 0) - { - int exitCode = fn(arg); - rval = INTERNAL_SYSCALL(exit, 0, 1, exitCode); - } - - return rval; -} - -#ifdef __NR_clone2 -int -__clone2(int (*fn)(void *arg), void *child_stack, size_t stack_size, - int flags, void *arg, ...) -{ - int rval = -EINVAL; - if (fn && child_stack) - { - rval = INTERNAL_SYSCALL(clone2, 0, 3, flags, child_stack, stack_size); - } - - if (rval == 0) - { - int exitCode = fn(arg); - rval = INTERNAL_SYSCALL(exit, 0, 1, exitCode); - } - - return rval; -} -#endif diff --git a/libc/sysdeps/linux/microblaze/vfork.S b/libc/sysdeps/linux/microblaze/vfork.S index cd6012889..cadd1167d 100644 --- a/libc/sysdeps/linux/microblaze/vfork.S +++ b/libc/sysdeps/linux/microblaze/vfork.S @@ -29,19 +29,14 @@ __vfork: addi r4, r3, 125 /* minimum err value */ blti r4, 1f /* is r3 < -125? */ bri 2f /* normal return */ -1: sub r3, r3, r0 /* r3 = -r3 */ -#ifdef __PIC__ - mfs r3,rpc - addik r3,r3,_GLOBAL_OFFSET_TABLE_+8 - lwi r3,r3,C_SYMBOL_NAME(errno)@GOT - sw r3, r0, r3 -#else - swi r3, r0, C_SYMBOL_NAME(errno); -#endif - /* state restore etc */ + +1: rsubk r3,r3,r0 + rtsd r15,8 + addik r3,r0,-1 /* delay slot. */ + 2: rtsd r15, 8 /* error return */ nop .size __vfork, .-__vfork -weak_alias(__vfork,vfork) +weak_alias(__vfork, vfork) libc_hidden_def(vfork) |