diff options
Diffstat (limited to 'csu')
| -rw-r--r-- | csu/Makefile | 24 | ||||
| -rw-r--r-- | csu/libc-start.c | 2 | ||||
| -rw-r--r-- | csu/libc-tls.c | 6 | ||||
| -rw-r--r-- | csu/static-reloc.c | 26 |
4 files changed, 52 insertions, 6 deletions
diff --git a/csu/Makefile b/csu/Makefile index e42a32b3eb..86b95a9759 100644 --- a/csu/Makefile +++ b/csu/Makefile @@ -37,7 +37,9 @@ extra-objs = start.o \ S$(start-installed-name) omit-deps = $(patsubst %.o,%,$(start-installed-name) g$(start-installed-name) \ b$(start-installed-name) $(csu-dummies) \ - S$(start-installed-name)) + S$(start-installed-name) \ + r$(start-installed-name) \ + gr$(start-installed-name)) install-lib = $(start-installed-name) g$(start-installed-name) $(csu-dummies) # No tests are allowed in the csu/ subdirectory because the startup @@ -60,10 +62,17 @@ extra-objs += gmon-start.o endif ifneq ($(start-installed-name),$(static-start-installed-name)) +# FIXME: Only Hurd defines static-start-installed-name. Hurd needs to +# provide special rules to support static PIE. extra-objs += $(static-start-installed-name) g$(static-start-installed-name) omit-deps += $(patsubst %.o,%,$(static-start-installed-name) \ g$(static-start-installed-name)) install-lib += $(static-start-installed-name) g$(static-start-installed-name) +else +ifeq (yes,$(enable-static-pie)) +extra-objs += r$(start-installed-name) gr$(start-installed-name) +install-lib += r$(start-installed-name) gr$(start-installed-name) +endif endif before-compile += $(objpfx)abi-tag.h @@ -82,7 +91,10 @@ multilib-extra-objs = $(addprefix $(multidir)/, $(install-lib)) extra-objs += $(multilib-extra-objs) endif -extra-objs += abi-note.o init.o +extra-objs += abi-note.o init.o static-reloc.o +ifeq (yes,$(build-shared)) +extra-objs += static-reloc.os +endif asm-CPPFLAGS += -I$(objpfx). # Enable unwinding so backtrace unwinds to __libc_start_main @@ -101,6 +113,9 @@ ifndef start-installed-name-rule # We link the ELF startfile along with a SHT_NOTE section indicating # the kernel ABI the binaries linked with this library will require. $(objpfx)$(start-installed-name): $(objpfx)start.o $(objpfx)abi-note.o \ + $(objpfx)init.o $(objpfx)static-reloc.o + $(link-relocatable) +$(objpfx)r$(start-installed-name): $(objpfx)start.o $(objpfx)abi-note.o \ $(objpfx)init.o $(link-relocatable) $(objpfx)S$(start-installed-name): $(objpfx)start.os $(objpfx)abi-note.o \ @@ -113,7 +128,10 @@ endif # to turn on profiling code at startup. ifeq (yes,$(build-shared)) $(objpfx)g$(start-installed-name): \ - $(objpfx)g%: $(objpfx)S% $(objpfx)gmon-start.os + $(objpfx)g%: $(objpfx)S% $(objpfx)gmon-start.os $(objpfx)static-reloc.os + $(link-relocatable) +$(objpfx)gr$(start-installed-name): \ + $(objpfx)gr%: $(objpfx)r% $(objpfx)gmon-start.o $(link-relocatable) ifneq ($(start-installed-name),$(static-start-installed-name)) $(objpfx)g$(static-start-installed-name): \ diff --git a/csu/libc-start.c b/csu/libc-start.c index 24c63be02f..34dd125260 100644 --- a/csu/libc-start.c +++ b/csu/libc-start.c @@ -141,6 +141,8 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL), __libc_multiple_libcs = &_dl_starting_up && !_dl_starting_up; #ifndef SHARED + _dl_relocate_static_pie (); + char **ev = &argv[argc + 1]; __environ = ev; diff --git a/csu/libc-tls.c b/csu/libc-tls.c index 00138eb43a..1f8ddaf543 100644 --- a/csu/libc-tls.c +++ b/csu/libc-tls.c @@ -114,6 +114,8 @@ __libc_setup_tls (void) size_t tcb_offset; const ElfW(Phdr) *phdr; + struct link_map *main_map = GL(dl_ns)[LM_ID_BASE]._ns_loaded; + /* Look through the TLS segment if there is any. */ if (_dl_phdr != NULL) for (phdr = _dl_phdr; phdr < &_dl_phdr[_dl_phnum]; ++phdr) @@ -122,7 +124,7 @@ __libc_setup_tls (void) /* Remember the values we need. */ memsz = phdr->p_memsz; filesz = phdr->p_filesz; - initimage = (void *) phdr->p_vaddr; + initimage = (void *) phdr->p_vaddr + main_map->l_addr; align = phdr->p_align; if (phdr->p_align > max_align) max_align = phdr->p_align; @@ -163,8 +165,6 @@ __libc_setup_tls (void) _dl_static_dtv[0].counter = (sizeof (_dl_static_dtv) / sizeof (_dl_static_dtv[0])) - 2; // _dl_static_dtv[1].counter = 0; would be needed if not already done - struct link_map *main_map = GL(dl_ns)[LM_ID_BASE]._ns_loaded; - /* Initialize the TLS block. */ #if TLS_TCB_AT_TP _dl_static_dtv[2].pointer.val = ((char *) tlsblock + tcb_offset diff --git a/csu/static-reloc.c b/csu/static-reloc.c new file mode 100644 index 0000000000..37be72c8ea --- /dev/null +++ b/csu/static-reloc.c @@ -0,0 +1,26 @@ +/* Special startup support for non-PIE static executables. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#if ENABLE_STATIC_PIE +#include <ldsodefs.h> + +void +_dl_relocate_static_pie (void) +{ +} +#endif |