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Avoid DWARF definition DIE on ifunc symbols
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H.J. Lu
parent
6dcf80c782
commit
f85fa27058
30
ChangeLog
30
ChangeLog
@ -1,3 +1,33 @@
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2012-08-09 H.J. Lu <hongjiu.lu@intel.com>
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[BZ #14166]
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* sysdeps/i386/i686/multiarch/strstr-c.c (strstr): Redefined
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to __redirect_strstr.
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(__strstr_sse42): Use typeof __redirect_strstr.
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(__strstr_ia32): Likewise.
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(__libc_strstr): New prototype.
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(strstr): Renamed to ...
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(__libc_strstr): This.
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(strstr): New strong alias of __libc_strstr.
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* sysdeps/x86_64/multiarch/strstr-c.c: Likewise.
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* sysdeps/unix/sysv/linux/x86_64/time.c (time): Redefined to
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__redirect_time.
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Include <time.h>.
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(__libc_time): New prototype.
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(time_ifunc): Replace time with __libc_time.
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(time): New strong alias and hidden definition of __libc_time.
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(__GI_time): Remove strong alias.
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* sysdeps/x86_64/multiarch/memmove.c: Don't include <string.h>.
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Include <stddef.h>.
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(memmove): Redefined to __redirect_memmove.
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(__memmove_sse2): Use typeof __redirect_memmove.
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(__memmove_ssse3): Likewise.
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(__memmove_ssse3_back): Likewise.
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(__libc_memmove): New prototype.
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(memmove): Renamed to ...
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(__libc_memmove): This.
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(memmove): New strong alias of __libc_memmove.
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2012-08-08 Mark Salter <msalter@redhat.com>
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* elf/elf.h
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4
NEWS
4
NEWS
@ -9,8 +9,8 @@ Version 2.17
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* The following bugs are resolved with this release:
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6778, 6808, 13717, 14042, 14150, 14151, 14154, 14157, 14173, 14283, 14298,
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14307, 14328, 14331, 14336, 14337, 14347, 14349
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6778, 6808, 13717, 14042, 14166, 14150, 14151, 14154, 14157, 14173, 14283,
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14298, 14307, 14328, 14331, 14336, 14337, 14347, 14349
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* Support for STT_GNU_IFUNC symbols added for s390 and s390x.
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Optimized versions of memcpy, memset, and memcmp added for System z10 and
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@ -7,9 +7,20 @@
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__hidden_ver1 (__strstr_ia32, __GI_strstr, __strstr_ia32);
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#endif
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/* Redefine strstr so that the compiler won't complain about the type
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mismatch with the IFUNC selector in strong_alias, below. */
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#undef strstr
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#define strstr __redirect_strstr
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#include "string/strstr.c"
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extern char *__strstr_sse42 (const char *, const char *) attribute_hidden;
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extern __typeof (__strstr_ia32) __strstr_ia32 attribute_hidden;
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extern __typeof (__redirect_strstr) __strstr_sse42 attribute_hidden;
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extern __typeof (__redirect_strstr) __strstr_ia32 attribute_hidden;
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libc_ifunc (strstr, HAS_SSE4_2 ? __strstr_sse42 : __strstr_ia32);
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/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
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ifunc symbol properly. */
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extern __typeof (__redirect_strstr) __libc_strstr;
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libc_ifunc (__libc_strstr, HAS_SSE4_2 ? __strstr_sse42 : __strstr_ia32)
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#undef strstr
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strong_alias (__libc_strstr, strstr)
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@ -16,11 +16,20 @@
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<http://www.gnu.org/licenses/>. */
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#ifdef SHARED
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/* Redefine time so that the compiler won't complain about the type
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mismatch with the IFUNC selector in strong_alias, below. */
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#undef time
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#define time __redirect_time
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#include <time.h>
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#include <dl-vdso.h>
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#define VSYSCALL_ADDR_vtime 0xffffffffff600400
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void *time_ifunc (void) __asm__ ("time");
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/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
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ifunc symbol properly. */
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extern __typeof (__redirect_time) __libc_time;
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void *time_ifunc (void) __asm__ ("__libc_time");
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void *
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time_ifunc (void)
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@ -30,7 +39,11 @@ time_ifunc (void)
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/* If the vDSO is not available we fall back on the old vsyscall. */
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return _dl_vdso_vsym ("__vdso_time", &linux26) ?: (void *) VSYSCALL_ADDR_vtime;
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}
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__asm (".type time, %gnu_indirect_function");
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__asm (".type __libc_time, %gnu_indirect_function");
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#undef time
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strong_alias (__libc_time, time)
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libc_hidden_ver (__libc_time, time)
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#else
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@ -45,5 +58,3 @@ time (time_t *t)
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}
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#endif
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strong_alias (time, __GI_time)
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@ -17,7 +17,7 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <string.h>
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#include <stddef.h>
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#ifndef NOT_IN_libc
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#include <shlib-compat.h>
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@ -29,20 +29,31 @@
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# define libc_hidden_builtin_def(name) \
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__hidden_ver1 (__memmove_sse2, __GI_memmove, __memmove_sse2);
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#endif
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#endif
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extern __typeof (memmove) __memmove_sse2 attribute_hidden;
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extern __typeof (memmove) __memmove_ssse3 attribute_hidden;
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extern __typeof (memmove) __memmove_ssse3_back attribute_hidden;
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/* Redefine memmove so that the compiler won't complain about the type
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mismatch with the IFUNC selector in strong_alias, below. */
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#undef memmove
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#define memmove __redirect_memmove
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#endif
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#include "string/memmove.c"
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#ifndef NOT_IN_libc
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libc_ifunc (memmove,
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extern __typeof (__redirect_memmove) __memmove_sse2 attribute_hidden;
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extern __typeof (__redirect_memmove) __memmove_ssse3 attribute_hidden;
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extern __typeof (__redirect_memmove) __memmove_ssse3_back attribute_hidden;
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/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
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ifunc symbol properly. */
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extern __typeof (__redirect_memmove) __libc_memmove;
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libc_ifunc (__libc_memmove,
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HAS_SSSE3
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? (HAS_FAST_COPY_BACKWARD
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? __memmove_ssse3_back : __memmove_ssse3)
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: __memmove_sse2);
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: __memmove_sse2)
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#undef memmove
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strong_alias (__libc_memmove, memmove)
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#if SHLIB_COMPAT (libc, GLIBC_2_2_5, GLIBC_2_14)
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compat_symbol (libc, memmove, memcpy, GLIBC_2_2_5);
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@ -7,9 +7,20 @@
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__hidden_ver1 (__strstr_sse2, __GI_strstr, __strstr_sse2);
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#endif
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/* Redefine strstr so that the compiler won't complain about the type
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mismatch with the IFUNC selector in strong_alias, below. */
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#undef strstr
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#define strstr __redirect_strstr
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#include "string/strstr.c"
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extern char *__strstr_sse42 (const char *, const char *) attribute_hidden;
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extern __typeof (__strstr_sse2) __strstr_sse2 attribute_hidden;
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extern __typeof (__redirect_strstr) __strstr_sse42 attribute_hidden;
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extern __typeof (__redirect_strstr) __strstr_sse2 attribute_hidden;
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libc_ifunc (strstr, HAS_SSE4_2 ? __strstr_sse42 : __strstr_sse2);
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/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
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ifunc symbol properly. */
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extern __typeof (__redirect_strstr) __libc_strstr;
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libc_ifunc (__libc_strstr, HAS_SSE4_2 ? __strstr_sse42 : __strstr_sse2)
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#undef strstr
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strong_alias (__libc_strstr, strstr)
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