* lin-lwp.c (child_wait): Call linux_record_stopped_pid. (lin_lwp_wait): Likewise. Update comments. * linux-nat.c (struct simple_pid_list, add_to_pid_list) (pull_pid_from_list, linux_record_stopped_pid): New.
* linux-nat.c: New file. * config/nm-linux.h (CHILD_INSERT_FORK_CATCHPOINT): Define. (CHILD_INSERT_VFORK_CATCHPOINT): Define. (CHILD_INSERT_EXEC_CATCHPOINT): Define. * config/alpha/alpha-linux.mh (NATDEPFILES): Add linux-nat.o. * config/arm/linux.mh (NATDEPFILES): Likewise. * config/i386/linux.mh (NATDEPFILES): Likewise. * config/i386/x86-64linux.mh (NATDEPFILES): Likewise. * config/ia64/linux.mh (NATDEPFILES): Likewise. * config/m68k/linux.mh (NATDEPFILES): Likewise. * config/mips/linux.mh (NATDEPFILES): Likewise. * config/powerpc/linux.mh (NATDEPFILES): Likewise. * config/s390/s390.mh (NATDEPFILES): Likewise. * config/sparc/linux.mh (NATDEPFILES): Likewise.