diff options
Diffstat (limited to 'src/basic/raw-clone.h')
| -rw-r--r-- | src/basic/raw-clone.h | 43 |
1 files changed, 19 insertions, 24 deletions
diff --git a/src/basic/raw-clone.h b/src/basic/raw-clone.h index 8c95380305..1f134ba7f2 100644 --- a/src/basic/raw-clone.h +++ b/src/basic/raw-clone.h @@ -2,24 +2,10 @@ #pragma once /*** - This file is part of systemd. - - Copyright 2010 Lennart Poettering - Copyright 2016 Michael Karcher - systemd 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. - - systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>. + Copyright © 2016 Michael Karcher ***/ +#include <errno.h> #include <sched.h> #include <sys/syscall.h> @@ -51,27 +37,36 @@ static inline pid_t raw_clone(unsigned long flags) { /* On s390/s390x and cris the order of the first and second arguments * of the raw clone() system call is reversed. */ ret = (pid_t) syscall(__NR_clone, NULL, flags); -#elif defined(__sparc__) && defined(__arch64__) +#elif defined(__sparc__) { /** - * sparc64 always returns the other process id in %o0, and + * sparc always returns the other process id in %o0, and * a boolean flag whether this is the child or the parent in * %o1. Inline assembly is needed to get the flag returned * in %o1. */ - int in_child, child_pid; + int in_child, child_pid, error; - asm volatile("mov %2, %%g1\n\t" - "mov %3, %%o0\n\t" + asm volatile("mov %3, %%g1\n\t" + "mov %4, %%o0\n\t" "mov 0 , %%o1\n\t" +#if defined(__arch64__) "t 0x6d\n\t" +#else + "t 0x10\n\t" +#endif + "addx %%g0, 0, %2\n\t" "mov %%o1, %0\n\t" "mov %%o0, %1" : - "=r"(in_child), "=r"(child_pid) : + "=r"(in_child), "=r"(child_pid), "=r"(error) : "i"(__NR_clone), "r"(flags) : - "%o1", "%o0", "%g1" ); + "%o1", "%o0", "%g1" "cc" ); - ret = in_child ? 0 : child_pid; + if (error) { + errno = child_pid; + ret = -1; + } else + ret = in_child ? 0 : child_pid; } #else ret = (pid_t) syscall(__NR_clone, flags, NULL); |