| Message ID | CAMe9rOqX-T9zLysCM3Gm0DttmgbqySYdZOR14dvYw9b2DHcv3A@mail.gmail.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v6,1/1] elf: Handle static PIE loaded at the non-zero address [BZ #31799] | expand |
On Fri, Oct 25, 2024 at 5:18 PM H.J. Lu <hjl.tools@gmail.com> wrote: > > On Wed, Oct 23, 2024 at 10:30 PM Noah Goldstein <goldstein.w.n@gmail.com> wrote: > ... > > >>>> >> +LIBC_CONFIG_VAR([pde-load-address], [$libc_cv_pde_load_address]) > > >>>> >> + > > >>>> >> +LIBC_LINKER_FEATURE([-Ttext-segment=$libc_cv_pde_load_address], > > >>>> >> + [-Wl,-Ttext-segment=$libc_cv_pde_load_address], > > >>>> >> + [libc_cv_load_address=-Wl,-Ttext-segment], > > >>>> >> + [libc_cv_load_address=]) > > >>>> >> +LIBC_CONFIG_VAR([load-address-ldflag], [$libc_cv_load_address]) > > >>>> >> + > > > > IIUC, all of the new conf code is for setting up tests. > > Can you make that more clear in either comment or var names? > > Done. Hmm? This doesn't seem done. I mean can you make it explicit these config options are only used for tests internal to glibc. > > > >>>> >> AC_MSG_CHECKING(if we can build programs as PIE) > > >>>> >> AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#ifdef PIE_UNSUPPORTED > > >>>> >> # error PIE is not supported > > >>>> >> diff --git a/elf/Makefile b/elf/Makefile > > >>>> >> index 57b3a19d36..4e2d123b8e 100644 > > >>>> >> --- a/elf/Makefile > > >>>> >> +++ b/elf/Makefile > > >>>> >> @@ -1046,6 +1046,25 @@ tests-pie += \ > > >>>> >> tst-pie1 \ > > >>>> >> tst-pie2 \ > > >>>> >> # tests-pie > > >>>> >> +ifneq (,$(load-address-ldflag)) > > >>>> >> +tests += \ > > >>>> >> + tst-pie-address \ > > >>>> >> + # tests > > >>>> >> +tests-pie += \ > > >>>> >> + tst-pie-address \ > > >>>> >> + # tests-pie > > >>>> >> +LDFLAGS-tst-pie-address += $(load-address-ldflag)=$(pde-load-address) > > >>>> >> +ifeq (yes,$(enable-static-pie)) > > >>>> >> +tests += \ > > >>>> >> + tst-pie-address-static \ > > >>>> >> + # tests > > >>>> >> +tests-static += \ > > >>>> >> + tst-pie-address-static \ > > >>>> >> + # tests-static > > >>>> >> +LDFLAGS-tst-pie-address-static += \ > > >>>> >> + $(load-address-ldflag)=$(pde-load-address) > > >>>> >> +endif > > >>>> >> +endif > > >>>> >> ifeq (yes,$(have-protected-data)) > > >>>> >> tests += vismain > > >>>> >> tests-pie += vismain > > >>>> >> @@ -1896,6 +1915,7 @@ $(objpfx)tst-array5-static-cmp.out: tst-array5-static.exp \ > > >>>> >> > > >>>> >> CFLAGS-tst-pie1.c += $(pie-ccflag) > > >>>> >> CFLAGS-tst-pie2.c += $(pie-ccflag) > > >>>> >> +CFLAGS-tst-pie-address.c += $(pie-ccflag) > > >>>> >> > > >>>> >> $(objpfx)tst-piemod1.so: $(libsupport) > > >>>> >> $(objpfx)tst-pie1: $(objpfx)tst-piemod1.so > > >>>> >> diff --git a/elf/dl-reloc-static-pie.c b/elf/dl-reloc-static-pie.c > > >>>> >> index 10c23d0bf0..6286f19f1f 100644 > > >>>> >> --- a/elf/dl-reloc-static-pie.c > > >>>> >> +++ b/elf/dl-reloc-static-pie.c > > >>>> >> @@ -37,21 +37,32 @@ _dl_relocate_static_pie (void) > > >>>> >> { > > >>>> >> struct link_map *main_map = _dl_get_dl_main_map (); > > >>>> >> > > >>>> >> - /* Figure out the run-time load address of static PIE. */ > > >>>> >> - main_map->l_addr = elf_machine_load_address (); > > >>>> >> - > > >>>> >> - /* Read our own dynamic section and fill in the info array. */ > > >>>> >> - main_map->l_ld = ((void *) main_map->l_addr + elf_machine_dynamic ()); > > >>>> >> - > > >>>> >> + ElfW(Addr) file_p_vaddr = 0; > > >>>> >> const ElfW(Phdr) *ph, *phdr = GL(dl_phdr); > > >>>> >> size_t phnum = GL(dl_phnum); > > >>>> >> for (ph = phdr; ph < &phdr[phnum]; ++ph) > > >>>> >> - if (ph->p_type == PT_DYNAMIC) > > >>>> >> + switch (ph->p_type) > > >>>> >> { > > >>>> >> + case PT_LOAD: > > >>>> >> + /* Get p_vaddr of the PT_LOAD segement which covers the file > > >>>> >> + start. */ > > >>>> >> + if (ph->p_offset == 0) > > >>>> >> + file_p_vaddr = ph->p_vaddr; > > >>>> >> + break; > > >>>> >> + case PT_DYNAMIC: > > >>>> >> main_map->l_ld_readonly = (ph->p_flags & PF_W) == 0; > > >>>> >> break; > > >>>> >> + default: > > >>>> >> + break; > > >>>> >> } > > >>>> >> > > >>>> >> + /* Figure out the run-time load address of static PIE. */ > > >>>> >> + ElfW(Addr) l_addr = elf_machine_load_address (); > > >>>> >> + main_map->l_addr = l_addr - file_p_vaddr; > > > > Can you explain this? I though vaddr field was the true virtual-address > > but you seem to be treating it as an offset here. > > The l_addr field contains the difference between the address in the ELF > file and the address in memory. file_p_vaddr is used as the address in > static PIE. I updated comments in the v6 patch, > Okay, I think I understand. We were implicitly assuming vaddr was zero before by just using l_addr (v_addr + offset == true_addr if v_addr is zero). Is that correct? > Here is the v6 patch. OK to install? > > Thanks. > > -- > H.J.
On Sun, Oct 27, 2024 at 2:49 AM Noah Goldstein <goldstein.w.n@gmail.com> wrote: > > On Fri, Oct 25, 2024 at 5:18 PM H.J. Lu <hjl.tools@gmail.com> wrote: > > > > On Wed, Oct 23, 2024 at 10:30 PM Noah Goldstein <goldstein.w.n@gmail.com> wrote: > > ... > > > >>>> >> +LIBC_CONFIG_VAR([pde-load-address], [$libc_cv_pde_load_address]) > > > >>>> >> + > > > >>>> >> +LIBC_LINKER_FEATURE([-Ttext-segment=$libc_cv_pde_load_address], > > > >>>> >> + [-Wl,-Ttext-segment=$libc_cv_pde_load_address], > > > >>>> >> + [libc_cv_load_address=-Wl,-Ttext-segment], > > > >>>> >> + [libc_cv_load_address=]) > > > >>>> >> +LIBC_CONFIG_VAR([load-address-ldflag], [$libc_cv_load_address]) > > > >>>> >> + > > > > > > IIUC, all of the new conf code is for setting up tests. > > > Can you make that more clear in either comment or var names? > > > > Done. > > Hmm? This doesn't seem done. I mean can you make it explicit > these config options are only used for tests internal to glibc. Will update. > > > > > >>>> >> AC_MSG_CHECKING(if we can build programs as PIE) > > > >>>> >> AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#ifdef PIE_UNSUPPORTED > > > >>>> >> # error PIE is not supported > > > >>>> >> diff --git a/elf/Makefile b/elf/Makefile > > > >>>> >> index 57b3a19d36..4e2d123b8e 100644 > > > >>>> >> --- a/elf/Makefile > > > >>>> >> +++ b/elf/Makefile > > > >>>> >> @@ -1046,6 +1046,25 @@ tests-pie += \ > > > >>>> >> tst-pie1 \ > > > >>>> >> tst-pie2 \ > > > >>>> >> # tests-pie > > > >>>> >> +ifneq (,$(load-address-ldflag)) > > > >>>> >> +tests += \ > > > >>>> >> + tst-pie-address \ > > > >>>> >> + # tests > > > >>>> >> +tests-pie += \ > > > >>>> >> + tst-pie-address \ > > > >>>> >> + # tests-pie > > > >>>> >> +LDFLAGS-tst-pie-address += $(load-address-ldflag)=$(pde-load-address) > > > >>>> >> +ifeq (yes,$(enable-static-pie)) > > > >>>> >> +tests += \ > > > >>>> >> + tst-pie-address-static \ > > > >>>> >> + # tests > > > >>>> >> +tests-static += \ > > > >>>> >> + tst-pie-address-static \ > > > >>>> >> + # tests-static > > > >>>> >> +LDFLAGS-tst-pie-address-static += \ > > > >>>> >> + $(load-address-ldflag)=$(pde-load-address) > > > >>>> >> +endif > > > >>>> >> +endif > > > >>>> >> ifeq (yes,$(have-protected-data)) > > > >>>> >> tests += vismain > > > >>>> >> tests-pie += vismain > > > >>>> >> @@ -1896,6 +1915,7 @@ $(objpfx)tst-array5-static-cmp.out: tst-array5-static.exp \ > > > >>>> >> > > > >>>> >> CFLAGS-tst-pie1.c += $(pie-ccflag) > > > >>>> >> CFLAGS-tst-pie2.c += $(pie-ccflag) > > > >>>> >> +CFLAGS-tst-pie-address.c += $(pie-ccflag) > > > >>>> >> > > > >>>> >> $(objpfx)tst-piemod1.so: $(libsupport) > > > >>>> >> $(objpfx)tst-pie1: $(objpfx)tst-piemod1.so > > > >>>> >> diff --git a/elf/dl-reloc-static-pie.c b/elf/dl-reloc-static-pie.c > > > >>>> >> index 10c23d0bf0..6286f19f1f 100644 > > > >>>> >> --- a/elf/dl-reloc-static-pie.c > > > >>>> >> +++ b/elf/dl-reloc-static-pie.c > > > >>>> >> @@ -37,21 +37,32 @@ _dl_relocate_static_pie (void) > > > >>>> >> { > > > >>>> >> struct link_map *main_map = _dl_get_dl_main_map (); > > > >>>> >> > > > >>>> >> - /* Figure out the run-time load address of static PIE. */ > > > >>>> >> - main_map->l_addr = elf_machine_load_address (); > > > >>>> >> - > > > >>>> >> - /* Read our own dynamic section and fill in the info array. */ > > > >>>> >> - main_map->l_ld = ((void *) main_map->l_addr + elf_machine_dynamic ()); > > > >>>> >> - > > > >>>> >> + ElfW(Addr) file_p_vaddr = 0; > > > >>>> >> const ElfW(Phdr) *ph, *phdr = GL(dl_phdr); > > > >>>> >> size_t phnum = GL(dl_phnum); > > > >>>> >> for (ph = phdr; ph < &phdr[phnum]; ++ph) > > > >>>> >> - if (ph->p_type == PT_DYNAMIC) > > > >>>> >> + switch (ph->p_type) > > > >>>> >> { > > > >>>> >> + case PT_LOAD: > > > >>>> >> + /* Get p_vaddr of the PT_LOAD segement which covers the file > > > >>>> >> + start. */ > > > >>>> >> + if (ph->p_offset == 0) > > > >>>> >> + file_p_vaddr = ph->p_vaddr; > > > >>>> >> + break; > > > >>>> >> + case PT_DYNAMIC: > > > >>>> >> main_map->l_ld_readonly = (ph->p_flags & PF_W) == 0; > > > >>>> >> break; > > > >>>> >> + default: > > > >>>> >> + break; > > > >>>> >> } > > > >>>> >> > > > >>>> >> + /* Figure out the run-time load address of static PIE. */ > > > >>>> >> + ElfW(Addr) l_addr = elf_machine_load_address (); > > > >>>> >> + main_map->l_addr = l_addr - file_p_vaddr; > > > > > > Can you explain this? I though vaddr field was the true virtual-address > > > but you seem to be treating it as an offset here. > > > > The l_addr field contains the difference between the address in the ELF > > file and the address in memory. file_p_vaddr is used as the address in > > static PIE. I updated comments in the v6 patch, > > > Okay, I think I understand. We were implicitly assuming vaddr was zero > before by just using l_addr (v_addr + offset == true_addr if v_addr is zero). > Is that correct? offset isn't used explicitly. l_addr is the difference between the load address in the ELF file and the actual address in memory. The current code assumes that the load address in ELF file == 0. My change computes the load address by using p_vaddr of PT_LOAD segment at offset == 0. > > > Here is the v6 patch. OK to install? > > > > Thanks. > > > > -- > > H.J. -- H.J.
From c309d6edd62b64d5d732ef9b662e6074a79c2eff Mon Sep 17 00:00:00 2001 From: "H.J. Lu" <hjl.tools@gmail.com> Date: Sun, 26 May 2024 04:55:32 -0700 Subject: [PATCH v6] elf: Handle static PIE loaded at the non-zero address [BZ #31799] When a static PIE is loaded at the non-zero address, its PT_DYNAMIC segment entries contain the relocated values for the load address in static PIE. Since static PIE usually doesn't have PT_PHDR segment, use p_vaddr of the PT_LOAD segment which covers the file start as the load address in static PIE and adjust the entries of PT_DYNAMIC segment with the load address in static PIE by properly setting the l_addr field for static PIE. This fixes BZ #31799. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> --- configure | 72 ++++++++++++++++++++++++++++++++++++ configure.ac | 34 +++++++++++++++++ elf/Makefile | 20 ++++++++++ elf/dl-reloc-static-pie.c | 30 +++++++++++---- elf/tst-pie-address-static.c | 19 ++++++++++ elf/tst-pie-address.c | 28 ++++++++++++++ 6 files changed, 196 insertions(+), 7 deletions(-) create mode 100644 elf/tst-pie-address-static.c create mode 100644 elf/tst-pie-address.c diff --git a/configure b/configure index 9c0c0dce03..a84bb53fc8 100755 --- a/configure +++ b/configure @@ -8107,6 +8107,78 @@ printf "%s\n" "$libc_cv_cc_pie_default" >&6; } config_vars="$config_vars cc-pie-default = $libc_cv_cc_pie_default" +# Get Position Dependent Executable (PDE) load address to be used to +# load static Position Independent Executable (PIE) at a known working +# non-zero address. +{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking PDE load address" >&5 +printf %s "checking PDE load address... " >&6; } +if test ${libc_cv_pde_load_address+y} +then : + printf %s "(cached) " >&6 +else case e in #( + e) cat > conftest.S <<EOF +.globl _start +_start: +.globl __start +__start: +EOF +if test $libc_cv_cc_pie_default = yes; then + pde_ld_flags="-no-pie" +fi +if ${CC-cc} $pde_ld_flags $CFLAGS $CPPFLAGS $LDFLAGS \ + -nostartfiles -nostdlib $no_ssp \ + -o conftest conftest.S 1>&5 2>&5; then + # Get the load address of the first PT_LOAD segment. + libc_cv_pde_load_address=$(LC_ALL=C $READELF -Wl conftest \ + | $AWK '/LOAD/ { print $3; exit 0; }') +else + as_fn_error $? "${CC-cc} can not create PDE" "$LINENO" 5 +fi +rm -f conftest* ;; +esac +fi +{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_pde_load_address" >&5 +printf "%s\n" "$libc_cv_pde_load_address" >&6; } +config_vars="$config_vars +pde-load-address = $libc_cv_pde_load_address" + +# Get the linker command-line option to load executable at a non-zero +# address. +{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for linker that supports -Ttext-segment=$libc_cv_pde_load_address" >&5 +printf %s "checking for linker that supports -Ttext-segment=$libc_cv_pde_load_address... " >&6; } +libc_linker_feature=no +cat > conftest.c <<EOF +int _start (void) { return 42; } +EOF +if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp + -Wl,-Ttext-segment=$libc_cv_pde_load_address -nostdlib -nostartfiles + -fPIC -shared -o conftest.so conftest.c + 1>&5' + { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5 + (eval $ac_try) 2>&5 + ac_status=$? + printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5 + test $ac_status = 0; }; } +then + if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -Wl,-Ttext-segment=$libc_cv_pde_load_address -nostdlib \ + -nostartfiles -fPIC -shared -o conftest.so conftest.c 2>&1 \ + | grep "warning: -Ttext-segment=$libc_cv_pde_load_address ignored" > /dev/null 2>&1; then + true + else + libc_linker_feature=yes + fi +fi +rm -f conftest* +if test $libc_linker_feature = yes; then + libc_cv_load_address_ldflag=-Wl,-Ttext-segment +else + libc_cv_load_address_ldflag= +fi +{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_linker_feature" >&5 +printf "%s\n" "$libc_linker_feature" >&6; } +config_vars="$config_vars +load-address-ldflag = $libc_cv_load_address_ldflag" + { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if we can build programs as PIE" >&5 printf %s "checking if we can build programs as PIE... " >&6; } cat confdefs.h - <<_ACEOF >conftest.$ac_ext diff --git a/configure.ac b/configure.ac index d5a00461ff..8dc7e80ca3 100644 --- a/configure.ac +++ b/configure.ac @@ -1763,6 +1763,40 @@ fi rm -f conftest.*]) LIBC_CONFIG_VAR([cc-pie-default], [$libc_cv_cc_pie_default]) +# Get Position Dependent Executable (PDE) load address to be used to +# load static Position Independent Executable (PIE) at a known working +# non-zero address. +AC_CACHE_CHECK([PDE load address], + libc_cv_pde_load_address, [dnl +cat > conftest.S <<EOF +.globl _start +_start: +.globl __start +__start: +EOF +if test $libc_cv_cc_pie_default = yes; then + pde_ld_flags="-no-pie" +fi +if ${CC-cc} $pde_ld_flags $CFLAGS $CPPFLAGS $LDFLAGS \ + -nostartfiles -nostdlib $no_ssp \ + -o conftest conftest.S 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then + # Get the load address of the first PT_LOAD segment. + libc_cv_pde_load_address=$(LC_ALL=C $READELF -Wl conftest \ + | $AWK '/LOAD/ { print $3; exit 0; }') +else + AC_MSG_ERROR([${CC-cc} can not create PDE]) +fi +rm -f conftest*]) +LIBC_CONFIG_VAR([pde-load-address], [$libc_cv_pde_load_address]) + +# Get the linker command-line option to load executable at a non-zero +# address. +LIBC_LINKER_FEATURE([-Ttext-segment=$libc_cv_pde_load_address], + [-Wl,-Ttext-segment=$libc_cv_pde_load_address], + [libc_cv_load_address_ldflag=-Wl,-Ttext-segment], + [libc_cv_load_address_ldflag=]) +LIBC_CONFIG_VAR([load-address-ldflag], [$libc_cv_load_address_ldflag]) + AC_MSG_CHECKING(if we can build programs as PIE) AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#ifdef PIE_UNSUPPORTED # error PIE is not supported diff --git a/elf/Makefile b/elf/Makefile index 9cfe738919..4eaca7af67 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -1091,6 +1091,25 @@ tests-pie += \ tst-pie1 \ tst-pie2 \ # tests-pie +ifneq (,$(load-address-ldflag)) +tests += \ + tst-pie-address \ + # tests +tests-pie += \ + tst-pie-address \ + # tests-pie +LDFLAGS-tst-pie-address += $(load-address-ldflag)=$(pde-load-address) +ifeq (yes,$(enable-static-pie)) +tests += \ + tst-pie-address-static \ + # tests +tests-static += \ + tst-pie-address-static \ + # tests-static +LDFLAGS-tst-pie-address-static += \ + $(load-address-ldflag)=$(pde-load-address) +endif +endif ifeq (yes,$(have-protected-data)) tests += vismain tests-pie += vismain @@ -1937,6 +1956,7 @@ $(objpfx)tst-array5-static-cmp.out: tst-array5-static.exp \ CFLAGS-tst-pie1.c += $(pie-ccflag) CFLAGS-tst-pie2.c += $(pie-ccflag) +CFLAGS-tst-pie-address.c += $(pie-ccflag) $(objpfx)tst-piemod1.so: $(libsupport) $(objpfx)tst-pie1: $(objpfx)tst-piemod1.so diff --git a/elf/dl-reloc-static-pie.c b/elf/dl-reloc-static-pie.c index 10c23d0bf0..66fabf5543 100644 --- a/elf/dl-reloc-static-pie.c +++ b/elf/dl-reloc-static-pie.c @@ -37,21 +37,37 @@ _dl_relocate_static_pie (void) { struct link_map *main_map = _dl_get_dl_main_map (); - /* Figure out the run-time load address of static PIE. */ - main_map->l_addr = elf_machine_load_address (); - - /* Read our own dynamic section and fill in the info array. */ - main_map->l_ld = ((void *) main_map->l_addr + elf_machine_dynamic ()); - + /* NB: elf_machine_load_address () returns the run-time load address + of static PIE. The l_addr field contains the difference between the + address in the ELF file and the address in memory. If a static PIE + has a non-zero load address, we need to subtract it when computing + the l_addr field. Since static PIE usually doesn't have PT_PHDR + segment, use p_vaddr of the PT_LOAD segment which covers the file + start as the load address in static PIE. */ + ElfW(Addr) file_p_vaddr = 0; const ElfW(Phdr) *ph, *phdr = GL(dl_phdr); size_t phnum = GL(dl_phnum); for (ph = phdr; ph < &phdr[phnum]; ++ph) - if (ph->p_type == PT_DYNAMIC) + switch (ph->p_type) { + case PT_LOAD: + if (ph->p_offset == 0) + file_p_vaddr = ph->p_vaddr; + break; + case PT_DYNAMIC: main_map->l_ld_readonly = (ph->p_flags & PF_W) == 0; break; + default: + break; } + /* Figure out the run-time load address of static PIE. */ + ElfW(Addr) l_addr = elf_machine_load_address (); + main_map->l_addr = l_addr - file_p_vaddr; + + /* Read our own dynamic section and fill in the info array. */ + main_map->l_ld = ((void *) l_addr + elf_machine_dynamic ()); + elf_get_dynamic_info (main_map, false, true); # ifdef ELF_MACHINE_BEFORE_RTLD_RELOC diff --git a/elf/tst-pie-address-static.c b/elf/tst-pie-address-static.c new file mode 100644 index 0000000000..25d27fb962 --- /dev/null +++ b/elf/tst-pie-address-static.c @@ -0,0 +1,19 @@ +/* Test static PIE loaded at the specific address. + Copyright (C) 2024 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 + <https://www.gnu.org/licenses/>. */ + +#include "tst-pie-address.c" diff --git a/elf/tst-pie-address.c b/elf/tst-pie-address.c new file mode 100644 index 0000000000..1f01783631 --- /dev/null +++ b/elf/tst-pie-address.c @@ -0,0 +1,28 @@ +/* Test PIE loaded at the specific address. + Copyright (C) 2024 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 + <https://www.gnu.org/licenses/>. */ + +#include <stdio.h> + +static int +do_test (void) +{ + printf ("Hello\n"); + return 0; +} + +#include <support/test-driver.c> -- 2.47.0