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[Bug ld/14961] New: IFUNC pointer doesn't work for i386

From: hjl.tools at gmail dot com
Subject: [Bug ld/14961] New: IFUNC pointer doesn't work for i386
Date: Fri, 14 Dec 2012 19:37:43 +0000


             Bug #: 14961
           Summary: IFUNC pointer doesn't work for i386
           Product: binutils
           Version: 2.24 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: address@hidden
        ReportedBy: address@hidden
    Classification: Unclassified

address@hidden ifunc-xxx]$ cat foo.c
static int
two (void)
  return 2;

void * foo_ifunc (void) __asm__ ("foo") __attribute__ ((visibility
__asm__(".type foo, %gnu_indirect_function");

void * 
foo_ifunc (void)
  return two;

extern int foo (void) __attribute__ ((visibility ("hidden")));
int (*foo1_ptr) (void);

bar (void)
  foo1_ptr = foo;
address@hidden ifunc-xxx]$ cat main.c
#include <stdlib.h>

extern int (*foo1_ptr) (void);

extern void bar (void);

main (void)
  int foo1;

  bar ();
  foo1 = foo1_ptr ();
  if (foo1 != 2)
    abort ();
  return 0;
address@hidden ifunc-xxx]$ make
gcc -m32 -O3   -c -o main.o main.c
gcc -m32 -O3 -fPIC   -c -o foo.o foo.c
./ld -m elf_i386 --shared -o libfoo.so -z nocombreloc foo.o
gcc -m32 -o main main.o libfoo.so -Wl,-rpath,.
make: *** [all] Segmentation fault
address@hidden ifunc-xxx]$

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