7223e9ca5a
* i386.cc (class Output_data_plt_i386): Update declarations. Define Global_ifunc and Local_ifunc types. Add global_ifuncs_ and local_ifuncs_ fields. (Target_i386::do_plt_section_for_global): New function. (Target_i386::do_plt_section_for_local): New function. (Output_data_plt_i386::Output_data_plt_i386): Add symtab parameter; change all callers. Initialize global_ifuncs_ and local_ifuncs_. If doing a static link define __rel_iplt_start and __rel_iplt_end. (Output_data_plt_i386::add_entry): Handle IFUNC symbols. (Output_data_plt_i386::add_local_ifunc_entry): New function. (Output_data_plt_i386::do_write): Fix GOT entries for IFUNC symbols. (Target_i386::make_plt_section): New function, broken out of make_plt_entry. Set sh_info field of .rel.plt to point to .plt. (Target_i386::make_plt_entry): Call make_plt_section. (Target_i386::make_local_ifunc_plt_entry): New function. (Target_i386::Scan::reloc_needs_iplt_for_ifunc): New function. (Target_i386::Scan::local): Handle IFUNC symbols. Add R_386_IRELATIVE to switch. (Target_i386::Scan::global): Likewise. (Target_i386::Relocate::relocate): Likewise. (Target_i386::Relocatable_size_for_reloc): Add R_386_IRELATIVE to switch. * x86_64.cc (class Output_data_plt_x86_64): Update declarations. (Target_x86_64::do_plt_section_for_global): New function. (Target_x86_64::do_plt_section_for_local): New function. (Output_data_plt_x86_64::Output_data_plt_x86_64): Add symtab parameter; change all callers. If doing a static link define __rela_iplt_start and __rela_iplt_end. (Output_data_plt_x86_64::add_entry): Handle IFUNC symbols. (Output_data_plt_x86_64::add_local_ifunc_entry): New function. (Target_x86_64::make_plt_section): Set sh_info field of .rel.plt to point to .plt. (Target_x86_64::make_local_ifunc_plt_entry): New function. (Target_x86_64::Scan::check_non_pic): Add R_X86_64_IRELATIVE to switch. (Target_x86_64::Scan::reloc_needs_iplt_for_ifunc): New function. (Target_x86_64::Scan::local): Handle IFUNC symbols. Add R_X86_64_IRELATIVE to switch. (Target_x86_64::Scan::global): Likewise. (Target_x86_64::Relocate::relocate): Likewise. (Target_x86_64::Relocatable_size_for_reloc): Add R_X86_64_IRELATIVE to switch. * target.h (class Target): Add plt_section_for_global and plt_section_for_local functions. Add do_plt_section_for_global and do_plt_section_for_local virtual functions. * symtab.h (Symbol::needs_plt_entry): Handle IFUNC symbol. Add clarifying comments. (Symbol::use_plt_offset): Handle IFUNC symbol. * object.cc (Sized_relobj::Sized_relobj): Initialize local_plt_offsets_. (Sized_relobj::local_has_plt_offset): New function. (Sized_relobj::local_plt_offset): New function. (Sized_relobj::set_local_plt_offset): New function. (Sized_relobj::do_count): Handle IFUNC symbol. * object.h (class Symbol_value): Add is_ifunc_symbol_ field. Take a bit away from input_shndx_ field. Add set_is_func_symbol and is_ifunc_symbol functions. (class Sized_relobj): Update declarations. Remove Tls_got_entry and Local_tls_got_offsets. Define Local_plt_offsets. Add local_plt_offsets_ field. (Sized_relobj::clear_local_symbols): Clear local_plt_offsets_. * output.h (class Output_section_data): Add non-const output_section function. (class Output_data_got): Update declarations. (class Output_data_got::Got_entry): Add use_plt_offset_ field. Add use_plt_offset parameter to global and local constructors. Change all callers. Change local_sym_index_ field to 31 bits. Change GSYM_CODE and CONSTANT_CODE accordingly. * output.cc (Output_data_reloc_base::do_adjust_output_section): If doing a static link don't set sh_link field. (Output_data_got::Got_entry::write): Use PLT offset if appropriate. (Output_data_got::add_global_plt): New function. (Output_data_got::add_local_plt): New function. * target-reloc.h (relocate_section): Handle IFUNC symbol. * defstd.cc (in_section): Remove entries for __rel_iplt_start, __rel_iplt_end, __rela_iplt_start, and __rela_iplt_end. * configure.ac: Set IFUNC automake conditional for glibc >= 2.11. * testsuite/Makefile.am: Add a bunch of IFUNC tests, all within IFUNC conditional. * testsuite/ifunc-sel.h: New file. * testsuite/ifuncmain1.c: New file. * testsuite/ifuncmain1vis.c: New file. * testsuite/ifuncmod1.c: New file. * testsuite/ifuncdep2.c: New file. * testsuite/ifuncmain2.c: New file. * testsuite/ifuncmain3.c: New file. * testsuite/ifuncmod3.c: New file. * testsuite/ifuncmain4.c: New file. * testsuite/ifuncmain5.c: New file. * testsuite/ifuncmod5.c: New file. * testsuite/ifuncmain6pie.c: New file. * testsuite/ifuncmod6.c: New file. * testsuite/ifuncmain7.c: New file. * configure, testsuite/Makefile.in: Rebuild.
133 lines
2.2 KiB
C
133 lines
2.2 KiB
C
/* Test STT_GNU_IFUNC symbols with dlopen:
|
|
|
|
1. Direct function call.
|
|
2. Function pointer.
|
|
3. Visibility with override.
|
|
*/
|
|
|
|
#include <dlfcn.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
extern int __attribute__ ((noinline)) foo (void);
|
|
extern int __attribute__ ((noinline)) foo_hidden (void);
|
|
extern int __attribute__ ((noinline)) foo_protected (void);
|
|
|
|
typedef int (*foo_p) (void);
|
|
|
|
int
|
|
__attribute__ ((noinline))
|
|
foo (void)
|
|
{
|
|
return -30;
|
|
}
|
|
|
|
int
|
|
__attribute__ ((noinline))
|
|
foo_hidden (void)
|
|
{
|
|
return -20;
|
|
}
|
|
|
|
int
|
|
__attribute__ ((noinline))
|
|
foo_protected (void)
|
|
{
|
|
return -40;
|
|
}
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
foo_p p;
|
|
foo_p (*f) (void);
|
|
int *ret;
|
|
|
|
void *h = dlopen ("ifuncmod3.so", RTLD_LAZY);
|
|
if (h == NULL)
|
|
{
|
|
printf ("cannot load: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
p = dlsym (h, "foo");
|
|
if (p == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
if ((*p) () != -1)
|
|
abort ();
|
|
|
|
f = dlsym (h, "get_foo_p");
|
|
if (f == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
ret = dlsym (h, "ret_foo");
|
|
if (ret == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
p = (*f) ();
|
|
if (p != foo)
|
|
abort ();
|
|
if (foo () != -30)
|
|
abort ();
|
|
if (*ret != -30 || (*p) () != *ret)
|
|
abort ();
|
|
|
|
f = dlsym (h, "get_foo_hidden_p");
|
|
if (f == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
ret = dlsym (h, "ret_foo_hidden");
|
|
if (ret == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
p = (*f) ();
|
|
if (foo_hidden () != -20)
|
|
abort ();
|
|
if (*ret != 1 || (*p) () != *ret)
|
|
abort ();
|
|
|
|
f = dlsym (h, "get_foo_protected_p");
|
|
if (f == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
ret = dlsym (h, "ret_foo_protected");
|
|
if (ret == NULL)
|
|
{
|
|
printf ("symbol not found: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
p = (*f) ();
|
|
if (p == foo_protected)
|
|
abort ();
|
|
if (foo_protected () != -40)
|
|
abort ();
|
|
if (*ret != 0 || (*p) () != *ret)
|
|
abort ();
|
|
|
|
if (dlclose (h) != 0)
|
|
{
|
|
printf ("cannot close: %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|