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98a1627f19
Update
commit 68c4956b14
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Tue Apr 26 09:08:54 2022 -0700
x86: Properly handle function pointer reference
to properly handle IFUNC function pointer reference. Since IFUNC symbol
value is only known at run-time, set pointer_equality_needed for IFUNC
function pointer reference in PDE so that it will be resolved to its PLT
entry directly.
bfd/
PR ld/29216
* elf32-i386.c (elf_i386_scan_relocs): Set pointer_equality_needed
for IFUNC function pointer reference in PDE.
* elf64-x86-64.c (elf_x86_64_scan_relocs): Likewise.
ld/
PR ld/29216
* testsuite/ld-ifunc/ifunc.exp: Run PR ld/29216 test.
* testsuite/ld-ifunc/pr29216.c: New file.
63 lines
786 B
C
63 lines
786 B
C
#include <stdio.h>
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static int
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one (void)
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{
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return -30;
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}
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int foo (void) __attribute__ ((ifunc ("resolve_foo")));
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void *
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resolve_foo (void)
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{
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return (void *) one;
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}
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typedef int (*foo_p) (void);
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foo_p foo_ptr = foo;
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foo_p
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__attribute__ ((noinline))
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get_foo_p (void)
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{
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return foo_ptr;
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}
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foo_p
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__attribute__ ((noinline))
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get_foo (void)
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{
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return foo;
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}
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int
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main (void)
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{
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foo_p p;
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p = get_foo ();
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if (p != foo)
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__builtin_abort ();
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if ((*p) () != -30)
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__builtin_abort ();
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p = get_foo_p ();
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if (p != foo)
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__builtin_abort ();
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if ((*p) () != -30)
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__builtin_abort ();
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if (foo_ptr != foo)
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__builtin_abort ();
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if ((*foo_ptr) () != -30)
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__builtin_abort ();
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if (foo () != -30)
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__builtin_abort ();
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printf ("PASS\n");
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return 0;
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}
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