http://sourceware.org/bugzilla/show_bug.cgi?id=13302
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2011-10-21 18:31:06
UTC ---
Another problem:
[hjl@gnu-6 pr13302b]$ cat x.c
void alt2(void) { }
static void (*resolve (void)) (void)
{
return alt2;
}
void fct(void) __attribute__ ((ifunc ("resolve")));
extern __typeof(fct) int_fct __attribute__ ((alias("fct")));
void (*g)(void) = int_fct;
int
main ()
{
g ();
return 0;
}
[hjl@gnu-6 pr13302b]$ make
/usr/gcc-4.7.0-x32/bin/gcc -fpie -c -o x.o x.c
/usr/gcc-4.7.0-x32/bin/gcc -pie -o x x.o
readelf -r --wide x
Relocation section '.rela.dyn' at offset 0x498 contains 10 entries:
Offset Info Type Symbol's Value
Symbol's Name + Addend
00000000002008c8 0000000000000008 R_X86_64_RELATIVE
00000000000006a0
00000000002008d0 0000000000000008 R_X86_64_RELATIVE
0000000000000670
0000000000200ab0 0000000000000008 R_X86_64_RELATIVE
0000000000000790
0000000000200ac0 0000000000000008 R_X86_64_RELATIVE
0000000000000700
0000000000200ac8 0000000000000008 R_X86_64_RELATIVE
00000000000006df
0000000000200b18 0000000000000008 R_X86_64_RELATIVE
0000000000200b18
0000000000200ab8 0000000500000006 R_X86_64_GLOB_DAT 0000000000000000
__gmon_start__ + 0
0000000000200ad0 0000000a00000006 R_X86_64_GLOB_DAT 0000000000000000
_Jv_RegisterClasses + 0
0000000000200ad8 0000000b00000006 R_X86_64_GLOB_DAT 0000000000000000
__cxa_finalize + 0
0000000000200b20 0000000000000025 R_X86_64_IRELATIVE
00000000000006d2
Relocation section '.rela.plt' at offset 0x588 contains 3 entries:
Offset Info Type Symbol's Value
Symbol's Name + Addend
0000000000200af8 0000000400000007 R_X86_64_JUMP_SLOT 0000000000000000
__libc_start_main + 0
0000000000200b08 0000000b00000007 R_X86_64_JUMP_SLOT 0000000000000000
__cxa_finalize + 0
0000000000200b00 0000000000000025 R_X86_64_IRELATIVE
00000000000006d2
[hjl@gnu-6 pr13302b]$
We have R_X86_64_IRELATIVE in .rela.dyn.
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