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[135.23.175.80]) by smtp.gmail.com with ESMTPSA id j19-20020a05622a039300b002ecc2ebfd87sm10953840qtx.32.2022.04.12.11.42.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Apr 2022 11:42:18 -0700 (PDT) From: Carlos O'Donell To: libc-stable@sourceware.org Cc: Adhemerval Zanella , Szabolcs Nagy Subject: [PATCH 04/27] elf: Fix dynamic-link.h usage on rtld.c Date: Tue, 12 Apr 2022 14:41:42 -0400 Message-Id: <20220412184205.3343677-5-carlos@redhat.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220412184205.3343677-1-carlos@redhat.com> References: <20220412184205.3343677-1-carlos@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: application/octet-stream; x-default=true X-Spam-Status: No, score=-5.7 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-stable@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-stable mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Apr 2022 18:42:24 -0000 From: Adhemerval Zanella The 4af6982e4c fix does not fully handle RTLD_BOOTSTRAP usage on rtld.c due two issues: 1. RTLD_BOOTSTRAP is also used on dl-machine.h on various architectures and it changes the semantics of various machine relocation functions. 2. The elf_get_dynamic_info() change was done sideways, previously to 490e6c62aa get-dynamic-info.h was included by the first dynamic-link.h include *without* RTLD_BOOTSTRAP being defined. It means that the code within elf_get_dynamic_info() that uses RTLD_BOOTSTRAP is in fact unused. To fix 1. this patch now includes dynamic-link.h only once with RTLD_BOOTSTRAP defined. The ELF_DYNAMIC_RELOCATE call will now have the relocation fnctions with the expected semantics for the loader. And to fix 2. part of 4af6982e4c is reverted (the check argument elf_get_dynamic_info() is not required) and the RTLD_BOOTSTRAP pieces are removed. To reorganize the includes the static TLS definition is moved to its own header to avoid a circular dependency (it is defined on dynamic-link.h and dl-machine.h requires it at same time other dynamic-link.h definition requires dl-machine.h defitions). Also ELF_MACHINE_NO_REL, ELF_MACHINE_NO_RELA, and ELF_MACHINE_PLT_REL are moved to its own header. Only ancient ABIs need special values (arm, i386, and mips), so a generic one is used as default. The powerpc Elf64_FuncDesc is also moved to its own header, since csu code required its definition (which would require either include elf/ folder or add a full path with elf/). Checked on x86_64, i686, aarch64, armhf, powerpc64, powerpc32, and powerpc64le. Reviewed-by: Szabolcs Nagy (cherry picked from commit d6d89608ac8cf2b37c75debad1fff653f6939f90) Resolved conflicts: elf/rtld.c --- elf/dl-load.c | 2 +- elf/dl-reloc-static-pie.c | 2 +- elf/dl-static-tls.h | 51 +++++++++++++++++++++ elf/dynamic-link.h | 33 +------------ elf/get-dynamic-info.h | 25 +++------- elf/rtld.c | 23 +++++----- elf/setup-vdso.h | 2 +- sysdeps/aarch64/dl-machine.h | 8 ++-- sysdeps/alpha/dl-machine.h | 6 +-- sysdeps/arc/dl-machine.h | 10 ++-- sysdeps/arm/dl-machine-rel.h | 31 +++++++++++++ sysdeps/arm/dl-machine.h | 11 +---- sysdeps/csky/dl-machine.h | 6 +-- sysdeps/generic/dl-machine-rel.h | 27 +++++++++++ sysdeps/generic/dl-machine.h | 2 + sysdeps/hppa/dl-machine.h | 6 +-- sysdeps/i386/dl-machine-rel.h | 31 +++++++++++++ sysdeps/i386/dl-machine.h | 11 +---- sysdeps/ia64/dl-machine.h | 6 +-- sysdeps/m68k/dl-machine.h | 6 +-- sysdeps/microblaze/dl-machine.h | 6 +-- sysdeps/mips/dl-machine-rel.h | 26 +++++++++++ sysdeps/mips/dl-machine.h | 6 +-- sysdeps/nios2/dl-machine.h | 6 +-- sysdeps/powerpc/powerpc32/dl-machine.h | 6 +-- sysdeps/powerpc/powerpc64/dl-funcdesc.h | 34 ++++++++++++++ sysdeps/powerpc/powerpc64/dl-irel.h | 2 +- sysdeps/powerpc/powerpc64/dl-machine.h | 19 ++------ sysdeps/riscv/dl-machine.h | 5 +- sysdeps/s390/s390-32/dl-machine.h | 6 +-- sysdeps/s390/s390-64/dl-machine.h | 6 +-- sysdeps/sh/dl-machine.h | 6 +-- sysdeps/sparc/sparc32/dl-machine.h | 6 +-- sysdeps/sparc/sparc64/dl-machine.h | 6 +-- sysdeps/unix/sysv/linux/powerpc/libc-vdso.h | 2 +- sysdeps/x86_64/dl-machine.h | 6 +-- 36 files changed, 272 insertions(+), 175 deletions(-) create mode 100644 elf/dl-static-tls.h create mode 100644 sysdeps/arm/dl-machine-rel.h create mode 100644 sysdeps/generic/dl-machine-rel.h create mode 100644 sysdeps/i386/dl-machine-rel.h create mode 100644 sysdeps/mips/dl-machine-rel.h create mode 100644 sysdeps/powerpc/powerpc64/dl-funcdesc.h diff --git a/elf/dl-load.c b/elf/dl-load.c index eea06629a9..fb3da5aa56 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -1296,7 +1296,7 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd, if (l->l_ld != 0) l->l_ld = (ElfW(Dyn) *) ((ElfW(Addr)) l->l_ld + l->l_addr); - elf_get_dynamic_info (l, false); + elf_get_dynamic_info (l); /* Make sure we are not dlopen'ing an object that has the DF_1_NOOPEN flag set, or a PIE object. */ diff --git a/elf/dl-reloc-static-pie.c b/elf/dl-reloc-static-pie.c index f323b4dd0d..ababafcf98 100644 --- a/elf/dl-reloc-static-pie.c +++ b/elf/dl-reloc-static-pie.c @@ -52,7 +52,7 @@ _dl_relocate_static_pie (void) break; } - elf_get_dynamic_info (main_map, false); + elf_get_dynamic_info (main_map); # ifdef ELF_MACHINE_BEFORE_RTLD_RELOC ELF_MACHINE_BEFORE_RTLD_RELOC (main_map, main_map->l_info); diff --git a/elf/dl-static-tls.h b/elf/dl-static-tls.h new file mode 100644 index 0000000000..730924fc01 --- /dev/null +++ b/elf/dl-static-tls.h @@ -0,0 +1,51 @@ +/* Inline functions for dynamic linking. + Copyright (C) 1995-2021 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 + . */ + +#ifndef _DL_STATIC_TLS_H +#define _DL_STATIC_TLS_H + +/* This macro is used as a callback from elf_machine_rel{a,} when a + static TLS reloc is about to be performed. Since (in dl-load.c) we + permit dynamic loading of objects that might use such relocs, we + have to check whether each use is actually doable. If the object + whose TLS segment the reference resolves to was allocated space in + the static TLS block at startup, then it's ok. Otherwise, we make + an attempt to allocate it in surplus space on the fly. If that + can't be done, we fall back to the error that DF_STATIC_TLS is + intended to produce. */ +#define HAVE_STATIC_TLS(map, sym_map) \ + (__builtin_expect ((sym_map)->l_tls_offset != NO_TLS_OFFSET \ + && ((sym_map)->l_tls_offset \ + != FORCED_DYNAMIC_TLS_OFFSET), 1)) + +#define CHECK_STATIC_TLS(map, sym_map) \ + do { \ + if (!HAVE_STATIC_TLS (map, sym_map)) \ + _dl_allocate_static_tls (sym_map); \ + } while (0) + +#define TRY_STATIC_TLS(map, sym_map) \ + (__builtin_expect ((sym_map)->l_tls_offset \ + != FORCED_DYNAMIC_TLS_OFFSET, 1) \ + && (__builtin_expect ((sym_map)->l_tls_offset != NO_TLS_OFFSET, 1) \ + || _dl_try_allocate_static_tls (sym_map, true) == 0)) + +int _dl_try_allocate_static_tls (struct link_map *map, bool optional) + attribute_hidden; + +#endif diff --git a/elf/dynamic-link.h b/elf/dynamic-link.h index 21cdfc88bb..ac4cc70dea 100644 --- a/elf/dynamic-link.h +++ b/elf/dynamic-link.h @@ -16,35 +16,7 @@ License along with the GNU C Library; if not, see . */ -/* This macro is used as a callback from elf_machine_rel{a,} when a - static TLS reloc is about to be performed. Since (in dl-load.c) we - permit dynamic loading of objects that might use such relocs, we - have to check whether each use is actually doable. If the object - whose TLS segment the reference resolves to was allocated space in - the static TLS block at startup, then it's ok. Otherwise, we make - an attempt to allocate it in surplus space on the fly. If that - can't be done, we fall back to the error that DF_STATIC_TLS is - intended to produce. */ -#define HAVE_STATIC_TLS(map, sym_map) \ - (__builtin_expect ((sym_map)->l_tls_offset != NO_TLS_OFFSET \ - && ((sym_map)->l_tls_offset \ - != FORCED_DYNAMIC_TLS_OFFSET), 1)) - -#define CHECK_STATIC_TLS(map, sym_map) \ - do { \ - if (!HAVE_STATIC_TLS (map, sym_map)) \ - _dl_allocate_static_tls (sym_map); \ - } while (0) - -#define TRY_STATIC_TLS(map, sym_map) \ - (__builtin_expect ((sym_map)->l_tls_offset \ - != FORCED_DYNAMIC_TLS_OFFSET, 1) \ - && (__builtin_expect ((sym_map)->l_tls_offset != NO_TLS_OFFSET, 1) \ - || _dl_try_allocate_static_tls (sym_map, true) == 0)) - -int _dl_try_allocate_static_tls (struct link_map *map, bool optional) - attribute_hidden; - +#include #include #ifdef RESOLVE_MAP @@ -91,9 +63,6 @@ elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[], # endif #endif -#include - - #ifdef RESOLVE_MAP # if defined RTLD_BOOTSTRAP || defined STATIC_PIE_BOOTSTRAP diff --git a/elf/get-dynamic-info.h b/elf/get-dynamic-info.h index d169099fbc..1ac0663d1f 100644 --- a/elf/get-dynamic-info.h +++ b/elf/get-dynamic-info.h @@ -22,10 +22,11 @@ #define _GET_DYNAMIC_INFO_H #include +#include #include static inline void __attribute__ ((unused, always_inline)) -elf_get_dynamic_info (struct link_map *l, bool check) +elf_get_dynamic_info (struct link_map *l) { #if __ELF_NATIVE_CLASS == 32 typedef Elf32_Word d_tag_utype; @@ -33,7 +34,7 @@ elf_get_dynamic_info (struct link_map *l, bool check) typedef Elf64_Xword d_tag_utype; #endif -#if !defined RTLD_BOOTSTRAP && !defined STATIC_PIE_BOOTSTRAP +#ifndef STATIC_PIE_BOOTSTRAP if (l->l_ld == NULL) return; #endif @@ -111,21 +112,10 @@ elf_get_dynamic_info (struct link_map *l, bool check) if (info[DT_REL] != NULL) assert (info[DT_RELENT]->d_un.d_val == sizeof (ElfW(Rel))); #endif -#ifdef RTLD_BOOTSTRAP - if (check) - { - /* Only the bind now flags are allowed. */ - assert (info[VERSYMIDX (DT_FLAGS_1)] == NULL - || (info[VERSYMIDX (DT_FLAGS_1)]->d_un.d_val & ~DF_1_NOW) == 0); - /* Flags must not be set for ld.so. */ - assert (info[DT_FLAGS] == NULL - || (info[DT_FLAGS]->d_un.d_val & ~DF_BIND_NOW) == 0); -# ifdef STATIC_PIE_BOOTSTRAP - assert (info[DT_RUNPATH] == NULL); - assert (info[DT_RPATH] == NULL); -# endif - } -#else +#ifdef STATIC_PIE_BOOTSTRAP + assert (info[DT_RUNPATH] == NULL); + assert (info[DT_RPATH] == NULL); +#endif if (info[DT_FLAGS] != NULL) { /* Flags are used. Translate to the old form where available. @@ -163,7 +153,6 @@ elf_get_dynamic_info (struct link_map *l, bool check) if (info[DT_RUNPATH] != NULL) /* If both RUNPATH and RPATH are given, the latter is ignored. */ info[DT_RPATH] = NULL; -#endif } #endif diff --git a/elf/rtld.c b/elf/rtld.c index 23207112a1..0a4c3d4fed 100644 --- a/elf/rtld.c +++ b/elf/rtld.c @@ -32,7 +32,6 @@ #include #include #include -#include "dynamic-link.h" #include #include #include @@ -50,9 +49,18 @@ #include #include #include +#include #include +/* This #define produces dynamic linking inline functions for + bootstrap relocation instead of general-purpose relocation. + Since ld.so must not have any undefined symbols the result + is trivial: always the map of ld.so itself. */ +#define RTLD_BOOTSTRAP +#define RESOLVE_MAP(map, scope, sym, version, flags) map +#include "dynamic-link.h" + /* Only enables rtld profiling for architectures which provides non generic hp-timing support. The generic support requires either syscall (clock_gettime), which will incur in extra overhead on loading time. @@ -507,15 +515,6 @@ _dl_start_final (void *arg, struct dl_start_final_info *info) # define bootstrap_map info.l #endif - /* This #define produces dynamic linking inline functions for - bootstrap relocation instead of general-purpose relocation. - Since ld.so must not have any undefined symbols the result - is trivial: always the map of ld.so itself. */ -#define RTLD_BOOTSTRAP -#define RESOLVE_MAP(map, scope, sym, version, flags) map -#include "get-dynamic-info.h" -#include "dynamic-link.h" - static ElfW(Addr) __attribute_used__ _dl_start (void *arg) { @@ -549,7 +548,7 @@ _dl_start (void *arg) /* Read our own dynamic section and fill in the info array. */ bootstrap_map.l_ld = (void *) bootstrap_map.l_addr + elf_machine_dynamic (); bootstrap_map.l_ld_readonly = DL_RO_DYN_SECTION; - elf_get_dynamic_info (&bootstrap_map, true); + elf_get_dynamic_info (&bootstrap_map); #if NO_TLS_OFFSET != 0 bootstrap_map.l_tls_offset = NO_TLS_OFFSET; @@ -1617,7 +1616,7 @@ dl_main (const ElfW(Phdr) *phdr, if (! rtld_is_main) { /* Extract the contents of the dynamic section for easy access. */ - elf_get_dynamic_info (main_map, false); + elf_get_dynamic_info (main_map); /* If the main map is libc.so, update the base namespace to refer to this map. If libc.so is loaded later, this happens diff --git a/elf/setup-vdso.h b/elf/setup-vdso.h index 6fdffafcca..f44748bc98 100644 --- a/elf/setup-vdso.h +++ b/elf/setup-vdso.h @@ -64,7 +64,7 @@ setup_vdso (struct link_map *main_map __attribute__ ((unused)), l->l_map_end += l->l_addr; l->l_text_end += l->l_addr; l->l_ld = (void *) ((ElfW(Addr)) l->l_ld + l->l_addr); - elf_get_dynamic_info (l, false); + elf_get_dynamic_info (l); _dl_setup_hash (l); l->l_relocated = 1; diff --git a/sysdeps/aarch64/dl-machine.h b/sysdeps/aarch64/dl-machine.h index 34c0790b89..07af183e71 100644 --- a/sysdeps/aarch64/dl-machine.h +++ b/sysdeps/aarch64/dl-machine.h @@ -24,7 +24,9 @@ #include #include #include +#include #include +#include #include /* Translate a processor specific dynamic tag to the index in l_info array. */ @@ -196,10 +198,6 @@ _dl_start_user: \n\ #define ELF_MACHINE_JMP_SLOT AARCH64_R(JUMP_SLOT) -/* AArch64 uses RELA not REL */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - #define DL_PLATFORM_INIT dl_platform_init () static inline void __attribute__ ((unused)) @@ -376,7 +374,7 @@ elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], } } -inline void +static inline void __attribute__ ((always_inline)) elf_machine_rela_relative (ElfW(Addr) l_addr, const ElfW(Rela) *reloc, diff --git a/sysdeps/alpha/dl-machine.h b/sysdeps/alpha/dl-machine.h index 66e1db524b..e948e54fb7 100644 --- a/sysdeps/alpha/dl-machine.h +++ b/sysdeps/alpha/dl-machine.h @@ -26,6 +26,8 @@ #define ELF_MACHINE_NAME "alpha" #include +#include +#include /* Mask identifying addresses reserved for the user program, @@ -241,10 +243,6 @@ $fixup_stack: \n\ /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_ALPHA_JMP_SLOT -/* The alpha never uses Elf64_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* We define an initialization functions. This is called very early in * _dl_sysdep_start. */ #define DL_PLATFORM_INIT dl_platform_init () diff --git a/sysdeps/arc/dl-machine.h b/sysdeps/arc/dl-machine.h index 4b64ffec25..f843ed9bd6 100644 --- a/sysdeps/arc/dl-machine.h +++ b/sysdeps/arc/dl-machine.h @@ -30,6 +30,8 @@ #include #include #include +#include +#include /* Dynamic Linking ABI for ARCv2 ISA. @@ -203,10 +205,6 @@ __start: \n\ /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_ARC_JUMP_SLOT -/* ARC uses Rela relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* Fixup a PLT entry to bounce directly to the function at VALUE. */ static inline ElfW(Addr) @@ -318,7 +316,7 @@ elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], } } -inline void +static inline void __attribute__ ((always_inline)) elf_machine_rela_relative (ElfW(Addr) l_addr, const ElfW(Rela) *reloc, void *const reloc_addr_arg) @@ -327,7 +325,7 @@ elf_machine_rela_relative (ElfW(Addr) l_addr, const ElfW(Rela) *reloc, *reloc_addr += l_addr; } -inline void +static inline void __attribute__ ((always_inline)) elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[], ElfW(Addr) l_addr, const ElfW(Rela) *reloc, diff --git a/sysdeps/arm/dl-machine-rel.h b/sysdeps/arm/dl-machine-rel.h new file mode 100644 index 0000000000..bec114706c --- /dev/null +++ b/sysdeps/arm/dl-machine-rel.h @@ -0,0 +1,31 @@ +/* ELF dynamic relocation type supported by the architecture. ARM version. + Copyright (C) 2001-2021 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 + . */ + +#ifndef _DL_MACHINE_REL_H +#define _DL_MACHINE_REL_H + +/* ARM never uses Elf32_Rela relocations for the dynamic linker. + Prelinked libraries may use Elf32_Rela though. */ +#define ELF_MACHINE_NO_RELA defined RTLD_BOOTSTRAP +#define ELF_MACHINE_NO_REL 0 + +/* ARM never uses Elf32_Rela relocations for the dynamic linker. + Prelinked libraries may use Elf32_Rela though. */ +#define ELF_MACHINE_PLT_REL 1 + +#endif diff --git a/sysdeps/arm/dl-machine.h b/sysdeps/arm/dl-machine.h index 86f866ca7c..3239841eb5 100644 --- a/sysdeps/arm/dl-machine.h +++ b/sysdeps/arm/dl-machine.h @@ -26,6 +26,8 @@ #include #include #include +#include +#include #ifndef CLEAR_CACHE # error CLEAR_CACHE definition required to handle TEXTREL @@ -258,10 +260,6 @@ _dl_start_user:\n\ /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_ARM_JUMP_SLOT -/* ARM never uses Elf32_Rela relocations for the dynamic linker. - Prelinked libraries may use Elf32_Rela though. */ -#define ELF_MACHINE_PLT_REL 1 - /* We define an initialization functions. This is called very early in _dl_sysdep_start. */ #define DL_PLATFORM_INIT dl_platform_init () @@ -294,11 +292,6 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rel *reloc, #endif /* !dl_machine_h */ -/* ARM never uses Elf32_Rela relocations for the dynamic linker. - Prelinked libraries may use Elf32_Rela though. */ -#define ELF_MACHINE_NO_RELA defined RTLD_BOOTSTRAP -#define ELF_MACHINE_NO_REL 0 - /* Names of the architecture-specific auditing callback functions. */ #define ARCH_LA_PLTENTER arm_gnu_pltenter #define ARCH_LA_PLTEXIT arm_gnu_pltexit diff --git a/sysdeps/csky/dl-machine.h b/sysdeps/csky/dl-machine.h index ec22f87577..4dfd957877 100644 --- a/sysdeps/csky/dl-machine.h +++ b/sysdeps/csky/dl-machine.h @@ -24,6 +24,8 @@ #include #include #include +#include +#include /* Return nonzero if ELF header is compatible with the running host. */ static inline int @@ -172,10 +174,6 @@ _dl_start_user:\n\ /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_CKCORE_JUMP_SLOT -/* C-SKY never uses Elf32_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* We define an initialization functions. This is called very early in _dl_sysdep_start. */ #define DL_PLATFORM_INIT dl_platform_init () diff --git a/sysdeps/generic/dl-machine-rel.h b/sysdeps/generic/dl-machine-rel.h new file mode 100644 index 0000000000..9167a1dffc --- /dev/null +++ b/sysdeps/generic/dl-machine-rel.h @@ -0,0 +1,27 @@ +/* ELF dynamic relocation type supported by the architecture. + Copyright (C) 2001-2021 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 + . */ + +#ifndef _DL_MACHINE_REL_H +#define _DL_MACHINE_REL_H + +/* Defined if the architecture supports Elf{32,64}_Rel relocations. */ +#define ELF_MACHINE_NO_REL 1 +/* Defined if the architecture supports Elf{32,64}_Rela relocations. */ +#define ELF_MACHINE_NO_RELA 0 + +#endif diff --git a/sysdeps/generic/dl-machine.h b/sysdeps/generic/dl-machine.h index 4a4ab4fc70..7da695d903 100644 --- a/sysdeps/generic/dl-machine.h +++ b/sysdeps/generic/dl-machine.h @@ -20,6 +20,8 @@ #include #include +#include +#include /* Return nonzero iff ELF header is compatible with the running host. */ diff --git a/sysdeps/hppa/dl-machine.h b/sysdeps/hppa/dl-machine.h index 088931f670..ac66f04418 100644 --- a/sysdeps/hppa/dl-machine.h +++ b/sysdeps/hppa/dl-machine.h @@ -31,6 +31,8 @@ #include #include #include +#include +#include /* These two definitions must match the definition of the stub in bfd/elf32-hppa.c (see plt_stub[]). @@ -525,10 +527,6 @@ asm ( \ #define ELF_MACHINE_JMP_SLOT R_PARISC_IPLT #define ELF_MACHINE_SIZEOF_JMP_SLOT PLT_ENTRY_SIZE -/* We only use RELA. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* Return the address of the entry point. */ #define ELF_MACHINE_START_ADDRESS(map, start) \ ({ \ diff --git a/sysdeps/i386/dl-machine-rel.h b/sysdeps/i386/dl-machine-rel.h new file mode 100644 index 0000000000..7ac46f78a6 --- /dev/null +++ b/sysdeps/i386/dl-machine-rel.h @@ -0,0 +1,31 @@ +/* ELF dynamic relocation type supported by the architecture. ARM version. + Copyright (C) 2001-2021 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 + . */ + +#ifndef _DL_MACHINE_REL_H +#define _DL_MACHINE_REL_H + +/* The i386 never uses Elf32_Rela relocations for the dynamic linker. + Prelinked libraries may use Elf32_Rela though. */ +#define ELF_MACHINE_NO_RELA defined RTLD_BOOTSTRAP +#define ELF_MACHINE_NO_REL 0 + +/* The i386 never uses Elf32_Rela relocations for the dynamic linker. + Prelinked libraries may use Elf32_Rela though. */ +#define ELF_MACHINE_PLT_REL 1 + +#endif diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h index fa902612ca..c55c9a3d64 100644 --- a/sysdeps/i386/dl-machine.h +++ b/sysdeps/i386/dl-machine.h @@ -26,6 +26,8 @@ #include #include #include +#include +#include /* Return nonzero iff ELF header is compatible with the running host. */ static inline int __attribute__ ((unused)) @@ -237,10 +239,6 @@ _dl_start_user:\n\ /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_386_JMP_SLOT -/* The i386 never uses Elf32_Rela relocations for the dynamic linker. - Prelinked libraries may use Elf32_Rela though. */ -#define ELF_MACHINE_PLT_REL 1 - /* We define an initialization functions. This is called very early in _dl_sysdep_start. */ #define DL_PLATFORM_INIT dl_platform_init () @@ -283,11 +281,6 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rel *reloc, #endif /* !dl_machine_h */ -/* The i386 never uses Elf32_Rela relocations for the dynamic linker. - Prelinked libraries may use Elf32_Rela though. */ -#define ELF_MACHINE_NO_RELA defined RTLD_BOOTSTRAP -#define ELF_MACHINE_NO_REL 0 - #ifdef RESOLVE_MAP /* Perform the relocation specified by RELOC and SYM (which is fully resolved). diff --git a/sysdeps/ia64/dl-machine.h b/sysdeps/ia64/dl-machine.h index 2217d0b556..c9608a51b0 100644 --- a/sysdeps/ia64/dl-machine.h +++ b/sysdeps/ia64/dl-machine.h @@ -27,6 +27,8 @@ #include #include #include +#include +#include /* Translate a processor specific dynamic tag to the index in l_info array. */ @@ -319,10 +321,6 @@ elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[], /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_IA64_IPLTLSB -/* According to the IA-64 specific documentation, Rela is always used. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* Return the address of the entry point. */ #define ELF_MACHINE_START_ADDRESS(map, start) \ ({ \ diff --git a/sysdeps/m68k/dl-machine.h b/sysdeps/m68k/dl-machine.h index 5e34c4784e..30323d62d4 100644 --- a/sysdeps/m68k/dl-machine.h +++ b/sysdeps/m68k/dl-machine.h @@ -24,6 +24,8 @@ #include #include #include +#include +#include /* Return nonzero iff ELF header is compatible with the running host. */ static inline int @@ -183,10 +185,6 @@ _dl_start_user:\n\ /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_68K_JMP_SLOT -/* The m68k never uses Elf32_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - static inline Elf32_Addr elf_machine_fixup_plt (struct link_map *map, lookup_t t, const ElfW(Sym) *refsym, const ElfW(Sym) *sym, diff --git a/sysdeps/microblaze/dl-machine.h b/sysdeps/microblaze/dl-machine.h index 3fd4988e60..b8cc5a7fe6 100644 --- a/sysdeps/microblaze/dl-machine.h +++ b/sysdeps/microblaze/dl-machine.h @@ -23,6 +23,8 @@ #include #include +#include +#include /* Return nonzero iff ELF header is compatible with the running host. */ static inline int @@ -169,10 +171,6 @@ _dl_start_user:\n\ /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_MICROBLAZE_JUMP_SLOT -/* The microblaze never uses Elf32_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - static inline Elf32_Addr elf_machine_fixup_plt (struct link_map *map, lookup_t t, const ElfW(Sym) *refsym, const ElfW(Sym) *sym, diff --git a/sysdeps/mips/dl-machine-rel.h b/sysdeps/mips/dl-machine-rel.h new file mode 100644 index 0000000000..ed39618041 --- /dev/null +++ b/sysdeps/mips/dl-machine-rel.h @@ -0,0 +1,26 @@ +/* ELF dynamic relocation type supported by the architecture. ARM version. + Copyright (C) 2001-2021 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 + . */ + +#ifndef _DL_MACHINE_REL_H +#define _DL_MACHINE_REL_H + +#define ELF_MACHINE_PLT_REL 1 +#define ELF_MACHINE_NO_REL 0 +#define ELF_MACHINE_NO_RELA 0 + +#endif diff --git a/sysdeps/mips/dl-machine.h b/sysdeps/mips/dl-machine.h index 7a821ceb8e..45a394907a 100644 --- a/sysdeps/mips/dl-machine.h +++ b/sysdeps/mips/dl-machine.h @@ -33,6 +33,8 @@ #include #include #include +#include +#include /* The offset of gp from GOT might be system-dependent. It's set by ld. The same value is also */ @@ -60,10 +62,6 @@ ((((type) == ELF_MACHINE_JMP_SLOT) * ELF_RTYPE_CLASS_PLT) \ | (((type) == R_MIPS_COPY) * ELF_RTYPE_CLASS_COPY)) -#define ELF_MACHINE_PLT_REL 1 -#define ELF_MACHINE_NO_REL 0 -#define ELF_MACHINE_NO_RELA 0 - /* Translate a processor specific dynamic tag to the index in l_info array. */ #define DT_MIPS(x) (DT_MIPS_##x - DT_LOPROC + DT_NUM) diff --git a/sysdeps/nios2/dl-machine.h b/sysdeps/nios2/dl-machine.h index 4de602b13d..430ca5d7ae 100644 --- a/sysdeps/nios2/dl-machine.h +++ b/sysdeps/nios2/dl-machine.h @@ -24,6 +24,8 @@ #include #include #include +#include +#include /* Return nonzero iff ELF header is compatible with the running host. */ static inline int @@ -200,10 +202,6 @@ _start:\n\ /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_NIOS2_JUMP_SLOT -/* The Nios II never uses Elf32_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* Fixup a PLT entry to bounce directly to the function at VALUE. */ static inline Elf32_Addr diff --git a/sysdeps/powerpc/powerpc32/dl-machine.h b/sysdeps/powerpc/powerpc32/dl-machine.h index cda012dc1b..8d062951ce 100644 --- a/sysdeps/powerpc/powerpc32/dl-machine.h +++ b/sysdeps/powerpc/powerpc32/dl-machine.h @@ -25,6 +25,8 @@ #include #include #include +#include +#include /* Translate a processor specific dynamic tag to the index in l_info array. */ @@ -145,10 +147,6 @@ __elf_preferred_address(struct link_map *loader, size_t maplength, /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_PPC_JMP_SLOT -/* The PowerPC never uses REL relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* We define an initialization function to initialize HWCAP/HWCAP2 and platform data so it can be copied into the TCB later. This is called very early in _dl_sysdep_start for dynamically linked binaries. */ diff --git a/sysdeps/powerpc/powerpc64/dl-funcdesc.h b/sysdeps/powerpc/powerpc64/dl-funcdesc.h new file mode 100644 index 0000000000..b2d1f76ce0 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/dl-funcdesc.h @@ -0,0 +1,34 @@ +/* PowerPC ELFv1 function descriptor definition. + Copyright (C) 2009-2021 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 + . */ + +#ifndef _DL_FUNCDESC_H +#define _DL_FUNCDESC_H + +#if _CALL_ELF != 2 +/* A PowerPC64 function descriptor. The .plt (procedure linkage + table) and .opd (official procedure descriptor) sections are + arrays of these. */ +typedef struct +{ + Elf64_Addr fd_func; + Elf64_Addr fd_toc; + Elf64_Addr fd_aux; +} Elf64_FuncDesc; +#endif + +#endif diff --git a/sysdeps/powerpc/powerpc64/dl-irel.h b/sysdeps/powerpc/powerpc64/dl-irel.h index 0e11b7ff64..aa9a2dca71 100644 --- a/sysdeps/powerpc/powerpc64/dl-irel.h +++ b/sysdeps/powerpc/powerpc64/dl-irel.h @@ -23,7 +23,7 @@ #include #include #include -#include +#include #define ELF_MACHINE_IRELA 1 diff --git a/sysdeps/powerpc/powerpc64/dl-machine.h b/sysdeps/powerpc/powerpc64/dl-machine.h index 3f92fbb369..3a4a21a412 100644 --- a/sysdeps/powerpc/powerpc64/dl-machine.h +++ b/sysdeps/powerpc/powerpc64/dl-machine.h @@ -28,23 +28,14 @@ #include #include #include +#include +#include +#include /* Translate a processor specific dynamic tag to the index in l_info array. */ #define DT_PPC64(x) (DT_PPC64_##x - DT_LOPROC + DT_NUM) -#if _CALL_ELF != 2 -/* A PowerPC64 function descriptor. The .plt (procedure linkage - table) and .opd (official procedure descriptor) sections are - arrays of these. */ -typedef struct -{ - Elf64_Addr fd_func; - Elf64_Addr fd_toc; - Elf64_Addr fd_aux; -} Elf64_FuncDesc; -#endif - #define ELF_MULT_MACHINES_SUPPORTED /* Return nonzero iff ELF header is compatible with the running host. */ @@ -292,10 +283,6 @@ BODY_PREFIX "_dl_start_user:\n" \ /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_PPC64_JMP_SLOT -/* The PowerPC never uses REL relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* We define an initialization function to initialize HWCAP/HWCAP2 and platform data so it can be copied into the TCB later. This is called very early in _dl_sysdep_start for dynamically linked binaries. */ diff --git a/sysdeps/riscv/dl-machine.h b/sysdeps/riscv/dl-machine.h index 343c0feb6b..a9a3f63cb4 100644 --- a/sysdeps/riscv/dl-machine.h +++ b/sysdeps/riscv/dl-machine.h @@ -26,6 +26,8 @@ #include #include #include +#include +#include #ifndef _RTLD_PROLOGUE # define _RTLD_PROLOGUE(entry) \ @@ -51,9 +53,6 @@ || (__WORDSIZE == 64 && (type) == R_RISCV_TLS_TPREL64))) \ | (ELF_RTYPE_CLASS_COPY * ((type) == R_RISCV_COPY))) -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* Return nonzero iff ELF header is compatible with the running host. */ static inline int __attribute_used__ elf_machine_matches_host (const ElfW(Ehdr) *ehdr) diff --git a/sysdeps/s390/s390-32/dl-machine.h b/sysdeps/s390/s390-32/dl-machine.h index 96a5e80c84..ba681d1eac 100644 --- a/sysdeps/s390/s390-32/dl-machine.h +++ b/sysdeps/s390/s390-32/dl-machine.h @@ -27,6 +27,8 @@ #include #include #include +#include +#include /* This is an older, now obsolete value. */ #define EM_S390_OLD 0xA390 @@ -277,10 +279,6 @@ _dl_start_user:\n\ /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_390_JMP_SLOT -/* The S390 never uses Elf32_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* We define an initialization functions. This is called very early in _dl_sysdep_start. */ #define DL_PLATFORM_INIT dl_platform_init () diff --git a/sysdeps/s390/s390-64/dl-machine.h b/sysdeps/s390/s390-64/dl-machine.h index c94d09b9c8..af2cffd9f9 100644 --- a/sysdeps/s390/s390-64/dl-machine.h +++ b/sysdeps/s390/s390-64/dl-machine.h @@ -28,6 +28,8 @@ #include #include #include +#include +#include #define ELF_MACHINE_IRELATIVE R_390_IRELATIVE @@ -225,10 +227,6 @@ _dl_start_user:\n\ /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_390_JMP_SLOT -/* The 64 bit S/390 never uses Elf64_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* We define an initialization functions. This is called very early in _dl_sysdep_start. */ #define DL_PLATFORM_INIT dl_platform_init () diff --git a/sysdeps/sh/dl-machine.h b/sysdeps/sh/dl-machine.h index 0c22dfd848..d14023e749 100644 --- a/sysdeps/sh/dl-machine.h +++ b/sysdeps/sh/dl-machine.h @@ -24,6 +24,8 @@ #include #include #include +#include +#include /* Return nonzero iff ELF header is compatible with the running host. */ static inline int __attribute__ ((unused)) @@ -251,10 +253,6 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rela *reloc, #endif /* !dl_machine_h */ -/* SH never uses Elf32_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - #ifdef RESOLVE_MAP /* Perform the relocation specified by RELOC and SYM (which is fully resolved). diff --git a/sysdeps/sparc/sparc32/dl-machine.h b/sysdeps/sparc/sparc32/dl-machine.h index 6361cfae9e..78f53bc499 100644 --- a/sysdeps/sparc/sparc32/dl-machine.h +++ b/sysdeps/sparc/sparc32/dl-machine.h @@ -28,6 +28,8 @@ #include #include #include +#include +#include /* Return nonzero iff ELF header is compatible with the running host. */ static inline int @@ -196,10 +198,6 @@ elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[], /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_SPARC_JMP_SLOT -/* The SPARC never uses Elf32_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* Undo the sub %sp, 6*4, %sp; add %sp, 22*4, %o0 below to get at the value we want in __libc_stack_end. */ #define DL_STACK_END(cookie) \ diff --git a/sysdeps/sparc/sparc64/dl-machine.h b/sysdeps/sparc/sparc64/dl-machine.h index 3fd18c6e5e..3fa79d038f 100644 --- a/sysdeps/sparc/sparc64/dl-machine.h +++ b/sysdeps/sparc/sparc64/dl-machine.h @@ -26,6 +26,8 @@ #include #include #include +#include +#include #define ELF64_R_TYPE_ID(info) ((info) & 0xff) #define ELF64_R_TYPE_DATA(info) ((info) >> 8) @@ -118,10 +120,6 @@ elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc, /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ #define ELF_MACHINE_JMP_SLOT R_SPARC_JMP_SLOT -/* The SPARC never uses Elf64_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* Set up the loaded object described by L so its unrelocated PLT entries will jump to the on-demand fixup code in dl-runtime.c. */ diff --git a/sysdeps/unix/sysv/linux/powerpc/libc-vdso.h b/sysdeps/unix/sysv/linux/powerpc/libc-vdso.h index db388a022d..72b75d3beb 100644 --- a/sysdeps/unix/sysv/linux/powerpc/libc-vdso.h +++ b/sysdeps/unix/sysv/linux/powerpc/libc-vdso.h @@ -24,7 +24,7 @@ #include #if (defined(__PPC64__) || defined(__powerpc64__)) && _CALL_ELF != 2 -# include +# include /* The correct solution is for _dl_vdso_vsym to return the address of the OPD for the kernel VDSO function. That address would then be stored in the __vdso_* variables and returned as the result of the IFUNC resolver function. diff --git a/sysdeps/x86_64/dl-machine.h b/sysdeps/x86_64/dl-machine.h index 90c77cfea1..94296719d4 100644 --- a/sysdeps/x86_64/dl-machine.h +++ b/sysdeps/x86_64/dl-machine.h @@ -27,6 +27,8 @@ #include #include #include +#include +#include /* Return nonzero iff ELF header is compatible with the running host. */ static inline int __attribute__ ((unused)) @@ -208,10 +210,6 @@ _dl_start_user:\n\ // XXX This is a work-around for a broken linker. Remove! #define ELF_MACHINE_IRELATIVE R_X86_64_IRELATIVE -/* The x86-64 never uses Elf64_Rel/Elf32_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 -#define ELF_MACHINE_NO_RELA 0 - /* We define an initialization function. This is called very early in _dl_sysdep_start. */ #define DL_PLATFORM_INIT dl_platform_init () -- 2.35.1