diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/sh/clone.S')
-rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/sh/clone.S | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/sh/clone.S b/REORG.TODO/sysdeps/unix/sysv/linux/sh/clone.S new file mode 100644 index 0000000000..9063b21928 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/sh/clone.S @@ -0,0 +1,103 @@ +/* Copyright (C) 1999-2017 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> +#include <tcb-offsets.h> + +/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg, + pid_t *ptid, void *tls, pid_t *ctid); */ + + .text +ENTRY(__clone) + /* sanity check arguments. */ + tst r4, r4 + bt/s 0f + tst r5, r5 + bf 1f +0: + bra .Lsyscall_error + mov #-EINVAL,r0 +1: + /* insert the args onto the new stack */ + mov.l r7, @-r5 + /* save the function pointer as the 0th element */ + mov.l r4, @-r5 + + /* do the system call */ + mov r6, r4 + mov.l @r15, r6 + mov.l @(8,r15), r7 + mov.l @(4,r15), r0 + mov #+SYS_ify(clone), r3 + trapa #0x15 + mov r0, r1 + mov #-12, r2 + shad r2, r1 + not r1, r1 // r1=0 means r0 = -1 to -4095 + tst r1, r1 // i.e. error in linux + bf .Lclone_end +.Lsyscall_error: + SYSCALL_ERROR_HANDLER +.Lclone_end: + tst r0, r0 + bt 2f +.Lpseudo_end: + rts + nop +2: + /* terminate the stack frame */ + mov #0, r14 + + /* thread starts */ + mov.l @r15, r1 + jsr @r1 + mov.l @(4,r15), r4 + + /* we are done, passing the return value through r0 */ + mov.l .L3, r1 +#ifdef SHARED + mov.l r12, @-r15 + sts.l pr, @-r15 + mov r0, r4 + mova .LG, r0 + mov.l .LG, r12 + add r0, r12 + mova .L3, r0 + add r0, r1 + jsr @r1 + nop + lds.l @r15+, pr + rts + mov.l @r15+, r12 +#else + jmp @r1 + mov r0, r4 +#endif + .align 2 +.LG: + .long _GLOBAL_OFFSET_TABLE_ +.L3: + .long PLTJMP(C_SYMBOL_NAME(_exit)) +PSEUDO_END (__clone) + +libc_hidden_def (__clone) +weak_alias (__clone, clone) |