mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-26 00:57:39 +03:00
2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
135 lines
4.1 KiB
C
135 lines
4.1 KiB
C
/* Machine-dependent ELF dynamic relocation inline functions. Stub version.
|
|
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
|
|
<https://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 ElfW(Addr)
|
|
elf_machine_fixup_plt (struct link_map *map, lookup_t t,
|
|
const ElfW(Sym) *refsym, const ElfW(Sym) *sym,
|
|
const ElfW(Rel) *reloc,
|
|
ElfW(Addr) *reloc_addr, ElfW(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
|