glibc/sysdeps/unix/sysv/linux/arm/Makefile

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ifeq ($(subdir),elf)
sysdep-rtld-routines += aeabi_read_tp libc-do-syscall
elf: Second ld.so relocation only if libc.so has been loaded Commit 8f8dd904c4a2207699bb666f30acceb5209c8d3f (“elf: rtld_multiple_ref is always true”) removed some code that happened to enable compatibility with programs that do not link against libc.so. Such programs cannot call dlopen or any dynamic linker functions (except __tls_get_addr), so this is not really useful. Still ld.so should not crash with a null-pointer dereference or undefined symbol reference in these cases. In the main relocation loop, call _dl_relocate_object unconditionally because it already checks if the object has been relocated. If libc.so was loaded, self-relocate ld.so against it and call __rtld_mutex_init and __rtld_malloc_init_real to activate the full implementations. Those are available only if libc.so is there, so skip these initialization steps if libc.so is absent. Without libc.so, the global scope can be completely empty. This can cause ld.so self-relocation to fail because if it uses symbol-based relocations, which is why the second ld.so self-relocation is not performed if libc.so is missing. The previous concern regarding GOT updates through self-relocation no longer applies because function pointers are updated explicitly through __rtld_mutex_init and __rtld_malloc_init_real, and not through relocation. However, the second ld.so self-relocation is still delayed, in case there are other symbols being used. Fixes commit 8f8dd904c4a2207699bb666f30acceb5209c8d3f (“elf: rtld_multiple_ref is always true”). Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2025-01-07 08:18:07 +00:00
# The test uses INTERNAL_SYSCALL_CALL. In thumb mode, this uses
# an undefined reference to __libc_do_syscall.
CFLAGS-tst-nolink-libc.c += -marm
endif
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ifeq ($(subdir),misc)
2002-10-13 Roland McGrath <roland@frob.com> * posix/unistd.h [__USE_GNU] (getresuid, getresgid, setresuid, setresgid): Declare them. * NEWS: Mention it. * include/unistd.h (__getresuid, __getresgid, __setresuid, __setresgid): Declare them, add libc_hidden_proto. * posix/Versions (libc: GLIBC_2.3.2): New set. Add getresuid, getresgid, setresuid, setresgid here. * Versions.def (libc): Define GLIBC_2.3.2 set. * sysdeps/generic/getresuid.c (__getresuid): Fix argument types. Add libc_hidden_def. * sysdeps/generic/getresgid.c (__getresgid): Likewise. * sysdeps/generic/setresgid.c: New file. * sysdeps/generic/setresuid.c: New file. * sysdeps/unix/sysv/linux/Makefile [$(subdir) = misc] (sysdep_routines): Don't add getresuid and getresgid here. * sysdeps/unix/sysv/linux/arm/Makefile [$(subdir) = misc] (sysdep_routines): Don't add setresuid and setresgid here. * sysdeps/unix/sysv/linux/cris/Makefile: Likewise. * sysdeps/unix/sysv/linux/sh/Makefile: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/Makefile: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/Makefile: Likewise. * sysdeps/unix/sysv/linux/i386/Makefile: Likewise. * sysdeps/unix/sysv/linux/m68k/Makefile: Likewise. * posix/Makefile (routines): Add them all here instead. * sysdeps/unix/sysv/linux/i386/getresuid.c (getresuid): Renamed to __getresuid. Add libc_hidden_def for that, and weak alias to old name. * sysdeps/unix/sysv/linux/i386/getresgid.c (getresgid): Renamed to __getresgid. Add libc_hidden_def for that, and weak alias to old name. * sysdeps/unix/sysv/linux/i386/setresuid.c: Add libc_hidden_def. [! __NR_setresuid]: Include generic file. * sysdeps/unix/sysv/linux/i386/setresgid.c (setresgid): Renamed to __setresgid. Add libc_hidden_def for that, and weak alias to old name. [! __NR_setresuid]: Include generic file. * sysdeps/unix/sysv/linux/syscalls.list (setresuid, setresgid): Caller is - now, not EXTRA. * sysdeps/unix/sysv/linux/sparc/sparc32/syscalls.list (setresuid, setresgid, getresuid, getresgid): Likewise. * sysdeps/unix/sysv/linux/syscalls.list (getresuid, getresgid): Add these calls here. * sysdeps/unix/sysv/linux/alpha/syscalls.list: Remove them here. * sysdeps/unix/sysv/linux/hppa/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/x86_64/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/mips/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/ia64/syscalls.list: Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdir) = misc] (sysdep_routines): Add setfsuid and setfsgid here. * sysdeps/unix/sysv/linux/arm/Makefile: Not here. * sysdeps/unix/sysv/linux/sparc/sparc32/Makefile: Likewise. * sysdeps/unix/sysv/linux/cris/Makefile: Likewise. * sysdeps/unix/sysv/linux/sh/Makefile: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/Makefile: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/Makefile: Likewise. * sysdeps/unix/sysv/linux/i386/Makefile: Likewise. * sysdeps/unix/sysv/linux/m68k/Makefile: Likewise.
2002-10-14 01:02:53 +00:00
sysdep_routines += ioperm
sysdep_headers += sys/elf.h
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endif
ifeq ($(subdir),signal)
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sysdep_routines += sigrestorer
endif
ifeq ($(subdir),stdlib)
gen-as-const-headers += ucontext_i.sym
endif
# Add a syscall function to each library that needs one.
ifeq ($(subdir),rt)
librt-sysdep_routines += libc-do-syscall
librt-shared-only-routines += libc-do-syscall
endif
ifeq ($(subdir),resolv)
libanl-sysdep_routines += libc-do-syscall
libanl-shared-only-routines += libc-do-syscall
endif
ifeq ($(subdir),csu)
sysdep_routines += libc-do-syscall
endif
ifeq ($(subdir),nscd)
nscd-modules += libc-do-syscall
endif
ifeq ($(subdir),nss)
libnss_db-sysdep_routines += libc-do-syscall
libnss_db-shared-only-routines += libc-do-syscall
LDFLAGS-tst-rfc3484 += $(common-objpfx)csu/libc-do-syscall.o
LDFLAGS-tst-rfc3484-2 += $(common-objpfx)csu/libc-do-syscall.o
LDFLAGS-tst-rfc3484-3 += $(common-objpfx)csu/libc-do-syscall.o
endif
abi-variants := soft hard
ifeq (,$(filter $(default-abi),$(abi-variants)))
Unknown ABI, must be one of $(abi-variants)
endif
abi-includes :=
abi-soft-condition := !defined __ARM_PCS_VFP
abi-hard-condition := defined __ARM_PCS_VFP