From dbd2053026a6af28adb1aa32e27603ae0d4efea6 Mon Sep 17 00:00:00 2001 From: Konstantin Belousov Date: Mon, 5 Apr 2021 06:38:07 +0300 Subject: [PATCH] libc dl_iterate_phdr(): dlpi_tls_data is wrong This is the same change as d36d681615170590, but for libc static implementaion of dl_iterate_phdr(). Reported by: emacsray@gmail.com PR: 254774 Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D29623 --- lib/libc/gen/dlfcn.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/lib/libc/gen/dlfcn.c b/lib/libc/gen/dlfcn.c index 16afdb6bf5d1..337ad48fd691 100644 --- a/lib/libc/gen/dlfcn.c +++ b/lib/libc/gen/dlfcn.c @@ -196,8 +196,6 @@ dl_init_phdr_info(void) for (i = 0; i < phdr_info.dlpi_phnum; i++) { if (phdr_info.dlpi_phdr[i].p_type == PT_TLS) { phdr_info.dlpi_tls_modid = 1; - phdr_info.dlpi_tls_data = - (void*)phdr_info.dlpi_phdr[i].p_vaddr; } } phdr_info.dlpi_adds = 1; @@ -210,13 +208,17 @@ dl_iterate_phdr(int (*callback)(struct dl_phdr_info *, size_t, void *) __unused, void *data __unused) { #ifndef IN_LIBDL + tls_index ti; int ret; __init_elf_aux_vector(); if (__elf_aux_vector == NULL) return (1); _once(&dl_phdr_info_once, dl_init_phdr_info); + ti.ti_module = 1; + ti.ti_offset = 0; mutex_lock(&dl_phdr_info_lock); + phdr_info.dlpi_tls_data = __tls_get_addr(&ti); ret = callback(&phdr_info, sizeof(phdr_info), data); mutex_unlock(&dl_phdr_info_lock); return (ret);