From 3d3316b1dee885153d44210b2e95dba68d00613a Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Tue, 10 Nov 2020 23:35:19 +0000 Subject: hurd: keep only required PLTs in ld.so We need NO_RTLD_HIDDEN because of the need for PLT calls in ld.so. See Roland's comment in https://sourceware.org/bugzilla/show_bug.cgi?id=15605 "in the Hurd it's crucial that calls like __mmap be the libc ones instead of the rtld-local ones after the bootstrap phase, when the dynamic linker is being used for dlopen and the like." We used to just avoid all hidden use in the rtld ; this commit switches to keeping only those that should use PLT calls, i.e. essentially those defined in sysdeps/mach/hurd/dl-sysdep.c: __assert_fail __assert_perror_fail __*stat64 _exit This fixes a few startup issues, notably the call to __tunable_get_val that is made before PLTs are set up. --- include/unistd.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/unistd.h') diff --git a/include/unistd.h b/include/unistd.h index f48da2c7a3..54becbc9eb 100644 --- a/include/unistd.h +++ b/include/unistd.h @@ -4,7 +4,9 @@ # ifndef _ISOMAC libc_hidden_proto (_exit, __noreturn__) +# ifndef NO_RTLD_HIDDEN rtld_hidden_proto (_exit, __noreturn__) +# endif libc_hidden_proto (alarm) extern size_t __confstr (int name, char *buf, size_t len); libc_hidden_proto (__confstr) -- cgit 1.4.1