diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/arch-fork.h | 4 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/sparc/kernel-features.h | 14 |
3 files changed, 25 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 7f2044dee5..6412367632 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2018-03-27 Adhemerval Zanella <adhemerval.zanella@linaro.org> + + * sysdeps/unix/sysv/linux/arch-fork.h [__ASSUME_CLONE_BACKWARDS] + (arch_fork): Issue INLINE_CLONE_SYSCALL if defined. + * sysdeps/unix/sysv/linux/sparc/kernel-features.h + (__ASSUME_CLONE_BACKWARDS): Define. + 2018-03-27 Jesse Hathaway <jesse@mbuki-mvuki.org> * sysdeps/unix/sysv/linux/getlogin_r.c (__getlogin_r_loginuid): Return diff --git a/sysdeps/unix/sysv/linux/arch-fork.h b/sysdeps/unix/sysv/linux/arch-fork.h index 3daa9651e5..046d9fc60d 100644 --- a/sysdeps/unix/sysv/linux/arch-fork.h +++ b/sysdeps/unix/sysv/linux/arch-fork.h @@ -34,7 +34,11 @@ arch_fork (void *ctid) const int flags = CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD; long int ret; #ifdef __ASSUME_CLONE_BACKWARDS +# ifdef INLINE_CLONE_SYSCALL + ret = INLINE_CLONE_SYSCALL (flags, 0, NULL, 0, ctid); +# else ret = INLINE_SYSCALL_CALL (clone, flags, 0, NULL, 0, ctid); +# endif #elif defined(__ASSUME_CLONE_BACKWARDS2) ret = INLINE_SYSCALL_CALL (clone, 0, flags, NULL, ctid, 0); #elif defined(__ASSUME_CLONE_BACKWARDS3) diff --git a/sysdeps/unix/sysv/linux/sparc/kernel-features.h b/sysdeps/unix/sysv/linux/sparc/kernel-features.h index 2fd12cb7ce..64d714036e 100644 --- a/sysdeps/unix/sysv/linux/sparc/kernel-features.h +++ b/sysdeps/unix/sysv/linux/sparc/kernel-features.h @@ -40,3 +40,17 @@ /* sparc only supports ipc syscall. */ #undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS + +/* SPARC kernel Kconfig does not define CONFIG_CLONE_BACKWARDS, however it + has the same ABI as if it did, implemented by sparc-specific code + (sparc_do_fork). + + It also has a unique return value convention: + + Parent --> %o0 == child's pid, %o1 == 0 + Child --> %o0 == parent's pid, %o1 == 1 + + Which required a special macro to correct issue the syscall + (INLINE_CLONE_SYSCALL). */ +#undef __ASSUME_CLONE_DEFAULT +#define __ASSUME_CLONE_BACKWARDS 1 |