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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /sysdeps/generic/dl-machine.h | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.bz2 glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'sysdeps/generic/dl-machine.h')
-rw-r--r-- | sysdeps/generic/dl-machine.h | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/sysdeps/generic/dl-machine.h b/sysdeps/generic/dl-machine.h deleted file mode 100644 index 59749bd84f..0000000000 --- a/sysdeps/generic/dl-machine.h +++ /dev/null @@ -1,133 +0,0 @@ -/* Machine-dependent ELF dynamic relocation inline functions. Stub version. - Copyright (C) 1995-2017 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/>. */ - -#define ELF_MACHINE_NAME "stub" - -#include <string.h> -#include <link.h> - - -/* Return nonzero iff ELF header is compatible with the running host. */ -static inline int -elf_machine_matches_host (const Elf32_Ehdr *ehdr) -{ - switch (ehdr->e_machine) - { - default: - return 0; - } -} - - -/* Return the link-time address of _DYNAMIC. */ -static inline Elf32_Addr -elf_machine_dynamic (void) -{ -#error "Damn, no _DYNAMIC" -} - - -/* Return the run-time load address of the shared object. */ -static inline Elf32_Addr -elf_machine_load_address (void) -{ -#error "Where am I?" -} - -/* Fixup a PLT entry to bounce directly to the function at VALUE. */ - -static inline Elf32_Addr -elf_machine_fixup_plt (struct link_map *map, lookup_t t, - const Elf32_Rel *reloc, - Elf32_Addr *reloc_addr, Elf32_Addr value) -{ - return *reloc_addr = value; -} - -/* Perform the relocation specified by RELOC and SYM (which is fully resolved). - LOADADDR is the load address of the object; INFO is an array indexed - by DT_* of the .dynamic section info. */ - -auto inline void -__attribute__ ((always_inline)) -elf_machine_rel (Elf32_Addr loadaddr, Elf32_Dyn *info[DT_NUM], - const Elf32_Rel *reloc, const Elf32_Sym *sym, - Elf32_Addr (*resolve) (const Elf32_Sym **ref, - Elf32_Addr reloc_addr, - int noplt)) -{ - Elf32_Addr *const reloc_addr = (Elf32_Addr *) reloc->r_offset; - Elf32_Addr loadbase; - - switch (ELF32_R_TYPE (reloc->r_info)) - { - case R_MACHINE_COPY: - loadbase = (*resolve) (&sym, (Elf32_Addr) reloc_addr, 0); - memcpy (reloc_addr, (void *) (loadbase + sym->st_value), sym->st_size); - break; - default: - _dl_reloc_bad_type (map, ELF32_R_TYPE (reloc->r_info), 0); - break; - } -} - - -auto inline Elf32_Addr -__attribute__ ((always_inline)) -elf_machine_rela (Elf32_Addr loadaddr, Elf32_Dyn *info[DT_NUM], - const Elf32_Rel *reloc, const Elf32_Sym *sym, - Elf32_Addr (*resolve) (const Elf32_Sym **ref, - Elf32_Addr reloc_addr, - int noplt)) -{ - _dl_signal_error (0, "Elf32_Rela relocation requested -- unused on " - NULL, ELF_MACHINE_NAME); -} - - -/* 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. */ - -static inline int -elf_machine_runtime_setup (struct link_map *l, int lazy) -{ - extern void _dl_runtime_resolve (Elf32_Word); - - if (lazy) - { - /* The GOT entries for functions in the PLT have not yet been filled - in. Their initial contents will arrange when called to push an - offset into the .rel.plt section, push _GLOBAL_OFFSET_TABLE_[1], - and then jump to _GLOBAL_OFFSET_TABLE[2]. */ - Elf32_Addr *got = (Elf32_Addr *) D_PTR (l, l_info[DT_PLTGOT]); - got[1] = (Elf32_Addr) l; /* Identify this shared object. */ - - /* This function will get called to fix up the GOT entry indicated by - the offset on the stack, and then jump to the resolved address. */ - got[2] = (Elf32_Addr) &_dl_runtime_resolve; - } - - return lazy; -} - - -/* Initial entry point code for the dynamic linker. - The C function `_dl_start' is the real entry point; - its return value is the user program's entry point. */ - -#define RTLD_START #error need some startup code |