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Finish IFUNC support for x86 and x86-64.

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Add support for the IRELAIVE relocation and IFUNC in static executables.
This commit is contained in:
Ulrich Drepper
2009-05-31 23:45:33 -07:00
parent 963cb6fcb4
commit 7441470835
9 changed files with 225 additions and 2 deletions
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30
csu/elf-init.c
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@ -36,6 +36,20 @@
#include <stddef.h>
#ifndef LIBC_NONSHARED
# include <link.h>
# include <dl-irel.h>
# ifdef ELF_MACHINE_IRELA
extern const ElfW(Rela) __rela_iplt_start [];
extern const ElfW(Rela) __rela_iplt_end [];
# endif
# ifdef ELF_MACHINE_IREL
extern const ElfW(Rel) __rel_iplt_start [];
extern const ElfW(Rel) __rel_iplt_end [];
# endif
#endif /* LIBC_NONSHARED */
/* These magic symbols are provided by the linker. */
extern void (*__preinit_array_start []) (int, char **, char **)
@ -67,6 +81,22 @@ __libc_csu_init (int argc, char **argv, char **envp)
the dynamic linker (before initializing any shared object. */
#ifndef LIBC_NONSHARED
# ifdef ELF_MACHINE_IRELA
{
const size_t size = __rela_iplt_end - __rela_iplt_start;
for (size_t i = 0; i < size; i++)
elf_irela (&__rela_iplt_start [i]);
}
# endif
# ifdef ELF_MACHINE_IREL
{
const size_t size = __rel_iplt_end - __rel_iplt_start;
for (size_t i = 0; i < size; i++)
elf_irel (&__rel_iplt_start [i]);
}
# endif
/* For static executables, preinit happens rights before init. */
{
const size_t size = __preinit_array_end - __preinit_array_start;