diff options
| -rw-r--r-- | tools/include/nolibc/arch-sparc.h | 16 | ||||
| -rw-r--r-- | tools/include/nolibc/sys.h | 29 |
2 files changed, 45 insertions, 0 deletions
diff --git a/tools/include/nolibc/arch-sparc.h b/tools/include/nolibc/arch-sparc.h index 1435172f3dfe..ca420d843e25 100644 --- a/tools/include/nolibc/arch-sparc.h +++ b/tools/include/nolibc/arch-sparc.h @@ -188,4 +188,20 @@ pid_t sys_fork(void) } #define sys_fork sys_fork +static __attribute__((unused)) +pid_t sys_vfork(void) +{ + pid_t parent, ret; + + parent = getpid(); + ret = my_syscall0(__NR_vfork); + + /* The syscall returns the parent pid in the child instead of 0 */ + if (ret == parent) + return 0; + else + return ret; +} +#define sys_vfork sys_vfork + #endif /* _NOLIBC_ARCH_SPARC_H */ diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h index aabac97a7fb0..295e71d34aba 100644 --- a/tools/include/nolibc/sys.h +++ b/tools/include/nolibc/sys.h @@ -22,6 +22,7 @@ #include <linux/time.h> #include <linux/auxvec.h> #include <linux/fcntl.h> /* for O_* and AT_* */ +#include <linux/sched.h> /* for clone_args */ #include <linux/stat.h> /* for statx() */ #include "errno.h" @@ -340,6 +341,34 @@ pid_t fork(void) return __sysret(sys_fork()); } +#ifndef sys_vfork +static __attribute__((unused)) +pid_t sys_vfork(void) +{ +#if defined(__NR_vfork) + return my_syscall0(__NR_vfork); +#elif defined(__NR_clone3) + /* + * clone() could be used but has different argument orders per + * architecture. + */ + struct clone_args args = { + .flags = CLONE_VM | CLONE_VFORK, + .exit_signal = SIGCHLD, + }; + + return my_syscall2(__NR_clone3, &args, sizeof(args)); +#else + return __nolibc_enosys(__func__); +#endif +} +#endif + +static __attribute__((unused)) +pid_t vfork(void) +{ + return __sysret(sys_vfork()); +} /* * int fsync(int fd); |