THis breaks static building of target alpha: /home/wbx/embedded-test/openadk/toolchain_qemu-alpha_uclibc-ng/usr/bin/alpha-openadk-linux-uclibc-gcc -c libc/misc/auxvt/getauxval.c -o libc/misc/auxvt/getauxval.os -Wall -Wstrict-prototypes -Wstrict-aliasing -Wp In file included from ./ldso/include/ldso.h:189, from libc/misc/auxvt/getauxval.c:21: ./ldso/include/dl-defs.h:76:10: fatal error: dl-sysdep.h: No such file or directory 76 | #include <dl-sysdep.h> | ^~~~~~~~~~~~~ compilation terminated. gmake[6]: *** [Makerules:372: libc/misc/auxvt/getauxval.os] Error 1 I think it is this part of the patch: diff --git a/ldso/include/dl-defs.h b/ldso/include/dl-defs.h index daa6685cb..e404f17ec 100644 --- a/ldso/include/dl-defs.h +++ b/ldso/include/dl-defs.h @@ -72,10 +72,8 @@ typedef struct { #endif #ifdef _LIBC -#ifndef __ARCH_HAS_NO_SHARED__ /* arch specific defines */ #include <dl-sysdep.h> -#endif #ifdef __TARGET_c6x__ #include <dl-sysdep.h> #endif Any idea?

best regards Waldemar Greg Ungerer wrote, > The Linux kernels ELF-FDPIC binfmt program loader can support loading and > running conventional ELF format binaries on noMMU kernels when compiled > appropriately. That is when they are constant displacement binaries such > as generated using the -pie compile option. > > Add a configure option to allow selecting ELF binary support in noMMU > mode configurations on architectures that support this. The main > requirement is to generate the ldso run-time loader to perform relocation > at load time. These configurations do not support shared libraries, so > there is no need to generate a full shared library, only the static > version is required. > > The use of ELF format binaries does mean a slightly simpler toolchain > generation (does not require a -uclinux- for some architectures) and does > not require an extra tool like elf2flt. > > This initial support targets M68K, ARM and RISC-V architectures. No kernel > changes are required, the required support for this is already in mainline > kernels (certainly as of linux-6.6). > > Note that for the M68K and ARM architectures that the initialized > registers and stack layout at process startup is slightly different for > the flat format loader and the ELF/ELF-FDPIC loaders. So we need some > changes to the startup code (crt1.S) for them. > > I have not done extensive testing outside of M68K, ARM and RISC-V. > I had to make changes to a couple of the dl-startup.h architecture files > to get them to build for this noMMU case. I did not dig down too deep on > the reasons, but they still seem ok for the MMU case as well. > > Signed-off-by: Greg Ungerer &lt;gerg(a)linux-m68k.org&gt; > --- > Makerules | 3 +++ > Rules.mak | 2 ++ > extra/Configs/Config.in | 9 +++++++-- > extra/Configs/Config.in.arch | 8 ++++++++ > ldso/include/dl-defs.h | 2 -- > ldso/include/ldso.h | 2 +- > ldso/ldso/arm/dl-startup.h | 2 ++ > ldso/ldso/m68k/dl-startup.h | 3 +++ > ldso/ldso/m68k/dl-sysdep.h | 2 ++ > ldso/ldso/riscv64/dl-startup.h | 2 ++ > libc/sysdeps/linux/arm/crt1.S | 2 +- > libc/sysdeps/linux/m68k/crt1.S | 10 +++++++--- > 12 files changed, 38 insertions(+), 9 deletions(-) > > diff --git a/Makerules b/Makerules > index 845d81897..1a7443c39 100644 > --- a/Makerules > +++ b/Makerules > @@ -22,6 +22,9 @@ ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y) > libs: $(lib-gdb-y) > endif > libs: $(lib-a-y) > +ifeq ($(HAVE_LDSO),y) > +$(lib-a-y): | $(ldso) > +endif > endif > objs: all_objs > $(lib-so-y) $(lib-a-y): | $(top_builddir)lib > diff --git a/Rules.mak b/Rules.mak > index 5b9154b72..2aacee521 100644 > --- a/Rules.mak > +++ b/Rules.mak > @@ -167,6 +167,8 @@ endif > > ifneq ($(HAVE_SHARED),y) > libc := > +endif > +ifneq ($(HAVE_LDSO),y) > interp := > ldso := > endif > diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in > index 287db13d2..18748d54b 100644 > --- a/extra/Configs/Config.in > +++ b/extra/Configs/Config.in > @@ -333,8 +333,9 @@ config STATIC_PIE > bool "Add support for Static Position Independent Executables (PIE)" > default n > depends on DOPIC && !UCLIBC_FORMAT_FDPIC_ELF && \ > - (TARGET_arm || TARGET_i386 || TARGET_x86_64 || TARGET_aarch64 || \ > - TARGET_mips || TARGET_xtensa || TARGET_powerpc) > + (TARGET_aarch64 || TARGET_arm || TARGET_i386 || \ > + TARGET_m68k || TARGET_mips || TARGET_powerpc || \ > + TARGET_riscv64 || TARGET_x86_64 || TARGET_xtensa) > > config ARCH_HAS_NO_SHARED > bool > @@ -346,9 +347,13 @@ config ARCH_HAS_NO_LDSO > config ARCH_HAS_UCONTEXT > bool > > +config HAVE_LDSO > + bool > + > config HAVE_SHARED > bool "Enable shared libraries" > depends on !ARCH_HAS_NO_SHARED > + select HAVE_LDSO > default y > help > If you wish to build uClibc with support for shared libraries then > diff --git a/extra/Configs/Config.in.arch b/extra/Configs/Config.in.arch > index 91b639493..4bcf3ff3f 100644 > --- a/extra/Configs/Config.in.arch > +++ b/extra/Configs/Config.in.arch > @@ -10,6 +10,14 @@ > if !ARCH_USE_MMU > choice > prompt "Target File Format" > +config UCLIBC_FORMAT_ELF > + bool "ELF (using ELF_FDPIC loader)" > + depends on !ARCH_USE_MMU && (TARGET_arm || TARGET_m68k || \ > + TARGET_riscv64) > + select DOPIC > + select STATIC_PIE > + select ARCH_HAS_NO_SHARED > + select HAVE_LDSO > config UCLIBC_FORMAT_FDPIC_ELF > bool "FDPIC ELF" > depends on !ARCH_USE_MMU && (TARGET_bfin || TARGET_frv || TARGET_arm) > diff --git a/ldso/include/dl-defs.h b/ldso/include/dl-defs.h > index daa6685cb..e404f17ec 100644 > --- a/ldso/include/dl-defs.h > +++ b/ldso/include/dl-defs.h > @@ -72,10 +72,8 @@ typedef struct { > #endif > > #ifdef _LIBC > -#ifndef __ARCH_HAS_NO_SHARED__ > /* arch specific defines */ > #include <dl-sysdep.h> > -#endif > #ifdef __TARGET_c6x__ > #include <dl-sysdep.h> > #endif > diff --git a/ldso/include/ldso.h b/ldso/include/ldso.h > index 8d9d057a0..80d5d5dd5 100755 > --- a/ldso/include/ldso.h > +++ b/ldso/include/ldso.h > @@ -48,7 +48,7 @@ > /* Pull in the MIN macro */ > #include <sys/param.h> > /* Pull in the ldso syscalls and string functions */ > -#ifndef __ARCH_HAS_NO_SHARED__ > +#if !defined(__ARCH_HAS_NO_SHARED__) || !defined(__ARCH_HAS_NO_LDSO__) > #include <dl-syscall.h> > #include <dl-string.h> > /* Now the ldso specific headers */ > diff --git a/ldso/ldso/arm/dl-startup.h b/ldso/ldso/arm/dl-startup.h > index cacd461e1..d00e7b053 100644 > --- a/ldso/ldso/arm/dl-startup.h > +++ b/ldso/ldso/arm/dl-startup.h > @@ -301,3 +301,5 @@ int raise(int sig) > _dl_exit(1); > } > #endif /* __FDPIC__ */ > + > +#define DL_UPDATE_LOADADDR_HDR(LOADADDR, ADDR, PHDR) > diff --git a/ldso/ldso/m68k/dl-startup.h b/ldso/ldso/m68k/dl-startup.h > index dfece443f..9c3285e27 100644 > --- a/ldso/ldso/m68k/dl-startup.h > +++ b/ldso/ldso/m68k/dl-startup.h > @@ -55,6 +55,9 @@ _dl_start_user:\n\ > * do something a little more subtle here. */ > #define GET_ARGV(ARGVP, ARGS) ARGVP = (((unsigned long *) ARGS) + 1) > > +/* We can't call functions earlier in the dl startup process */ > +#define NO_FUNCS_BEFORE_BOOTSTRAP > + > /* Handle relocation of the symbols in the dynamic loader. */ > static __always_inline > void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr, > diff --git a/ldso/ldso/m68k/dl-sysdep.h b/ldso/ldso/m68k/dl-sysdep.h > index 21937b259..5d2d7a097 100644 > --- a/ldso/ldso/m68k/dl-sysdep.h > +++ b/ldso/ldso/m68k/dl-sysdep.h > @@ -83,3 +83,5 @@ elf_machine_relative (Elf32_Addr load_off, const Elf32_Addr rel_addr, > *reloc_addr = load_off + rpnt->r_addend; > } while (--relative_count); > } > + > +#define DL_UPDATE_LOADADDR_HDR(LOADADDR, ADDR, PHDR) > diff --git a/ldso/ldso/riscv64/dl-startup.h b/ldso/ldso/riscv64/dl-startup.h > index dabe1bebd..82e525e66 100644 > --- a/ldso/ldso/riscv64/dl-startup.h > +++ b/ldso/ldso/riscv64/dl-startup.h > @@ -88,3 +88,5 @@ void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, ElfW(Addr) *reloc_addr, > _dl_exit(1); > } > } > + > +#define DL_UPDATE_LOADADDR_HDR(LOADADDR, ADDR, PHDR) > diff --git a/libc/sysdeps/linux/arm/crt1.S b/libc/sysdeps/linux/arm/crt1.S > index fade1d25c..799f11080 100644 > --- a/libc/sysdeps/linux/arm/crt1.S > +++ b/libc/sysdeps/linux/arm/crt1.S > @@ -245,7 +245,7 @@ _start: > mov fp, #0 > mov lr, #0 > > -#ifdef __ARCH_USE_MMU__ > +#if defined(__ARCH_USE_MMU__) || defined(__UCLIBC_FORMAT_ELF__) > #ifdef L_rcrt1 > /* We don't need to save a1 since no dynamic linker should have run */ > ldr a1, .L_GOT /* Get value at .L_GOT + 0 (offset to GOT)*/ > diff --git a/libc/sysdeps/linux/m68k/crt1.S b/libc/sysdeps/linux/m68k/crt1.S > index 815a6076f..e7292682b 100644 > --- a/libc/sysdeps/linux/m68k/crt1.S > +++ b/libc/sysdeps/linux/m68k/crt1.S > @@ -78,9 +78,13 @@ _start: > sub.l %fp, %fp > > #if !defined __ARCH_USE_MMU__ && defined __PIC__ > +#ifdef UCLIBC_FORMAT_ELF > + move.l #_GLOBAL_OFFSET_TABLE_, %a5 > +#else > /* Set up the global pointer. The GOT is at the beginning of the > data segment, whose address is in %d5. */ > move.l %d5,%a5 > +#endif > .equ have_current_got, 1 > #endif > > @@ -92,11 +96,11 @@ _start: > arguments for `main': argc, argv. envp will be determined > later in __libc_start_main. */ > move.l (%sp)+, %d0 /* Pop the argument count. */ > -#ifndef __ARCH_USE_MMU__ > - move.l (%sp)+, %a0 > -#else > +#if defined(__ARCH_USE_MMU__) || defined(__UCLIBC_FORMAT_ELF__) > move.l %sp, %a0 /* The argument vector starts just at the > current stack top. */ > +#else > + move.l (%sp)+, %a0 > #endif > > /* Provide the highest stack address to the user code (for stacks > -- > 2.25.1 > > _______________________________________________ > devel mailing list -- devel(a)uclibc-ng.org > To unsubscribe send an email to devel-leave(a)uclibc-ng.org >

Hi Greg, Greg Ungerer wrote, That fixes the alpha problem, thanks. But now it fails for ARM FDPIC target. /home/wbx/embedded-test/openadk/toolchain_qemu-arm-versatilepb_uclibc-ng_arm926ej_s_soft_eabi_fdpic_arm_nommu/usr/bin/arm-openadk-uclinuxfdpiceabi-gcc -c libc/misc/internals/reloc_static_pie.c -o libc/misc/intern als/reloc_static_pie.os -Wall -Wstrict-prototypes -Wstrict-aliasing -Wno-nonnull-compare -funsigned-char -fno-builtin -fcommon -fno-asm -fmerge-all-constants -msoft-float -std=gnu99 -mlittle-endian -fno-stack-pro tector -nostdinc -I./include -I./include -include libc-symbols.h -I./libc/sysdeps/linux/arm -I./libc/sysdeps/linux -I./ldso/ldso/arm -I./ldso/include -I. -DSTATIC -Os -fstrict-aliasing -fwrapv -fno-ident -mcpu=ar m926ej-s -mfpu=vfp -mfloat-abi=soft -Os -pipe -fomit-frame-pointer -marm -Wa,-mfloat-abi=soft -I./libc/sysdeps/linux/common -isystem /home/wbx/embedded-test/openadk/toolchain_qemu-arm-versatilepb_uclibc-ng_arm926 ej_s_soft_eabi_fdpic_arm_nommu/usr/lib/gcc/arm-openadk-uclinuxfdpiceabi/13.2.0/include-fixed -isystem /home/wbx/embedded-test/openadk/toolchain_qemu-arm-versatilepb_uclibc-ng_arm926ej_s_soft_eabi_fdpic_arm_nommu/ usr/lib/gcc/arm-openadk-uclinuxfdpiceabi/13.2.0/include -I/home/wbx/embedded-test/openadk/target_qemu-arm-versatilepb_uclibc-ng_arm926ej_s_soft_eabi_fdpic_arm_nommu/usr/include/ -DNDEBUG -fPIC -fno-stack-protecto r -DL_rcrt1 -MT libc/misc/internals/reloc_static_pie.os -MD -MP -MF libc/misc/internals/.reloc_static_pie.os.dep

In file included from ./include/elf.h:29, from ./include/link.h:24, from libc/misc/internals/reloc_static_pie.c:19: ./ldso/include/dl-syscall.h: In function '_dl_pread': ./ldso/include/dl-syscall.h:234:76: warning: right shift count >= width of type [-Wshift-count-overflow] 234 | return __syscall_pread(fd, buf, count, 0, __LONG_LONG_PAIR((offset >> 32), (offset & 0xffffffff))); | ^~ ./include/endian.h:52:39: note: in definition of macro '__LONG_LONG_PAIR' 52 | # define __LONG_LONG_PAIR(HI, LO) LO, HI | ^~ In file included from ./ldso/ldso/arm/dl-inlines.h:1, from ./ldso/include/ldso.h:185, from libc/misc/internals/reloc_static_pie.c:23: ./ldso/ldso/arm/../fdpic/dl-inlines.h: In function '_dl_funcdesc_for': ./ldso/ldso/arm/../fdpic/dl-inlines.h:180:15: warning: assignment to 'struct funcdesc_value **' from incompatible pointer type 'void **' [-Wincompatible-pointer-types] 180 | entry = htab_find_slot(ht, entry_point, 1, hash_pointer, eq_pointer); | ^ In file included from ./ldso/ldso/arm/dl-sysdep.h:144, from ./ldso/include/dl-defs.h:77, from ./ldso/include/dl-string.h:15, from ./ldso/include/dl-elf.h:12, from libc/misc/internals/reloc_static_pie.c:21: libc/misc/internals/reloc_static_pie.c: In function 'reloc_static_pie': ./ldso/ldso/arm/../fdpic/dl-sysdep.h:88:43: error: 'dl_boot_got_pointer' undeclared (first use in this function) 88 | #define DL_BOOT_COMPUTE_GOT(got) ((got) = dl_boot_got_pointer) ... Any idea? best regards Waldemar

Hi Greg, Greg Ungerer wrote, The generation of the config file was broken, I fixed it up. I committed and pushed your patch now!