i386: Fix build by GCC 5.0

Fixed 3 "make check" failures on glibc 32bit built by gcc 5.0 due to EBX
was enabled for allocation:

https://gcc.gnu.org/ml/gcc-patches/2014-10/msg00892.html

Tests elf/tst-tls3, elf/tst-execstack-needed, elf/tst-execstack-prog
were failed because EBX was used as PIC register.

	* sysdeps/i386/tls-macros.h: Include <features.h>.
	(TLS_LE): Use non-PIC version for GCC >= 5.0.
	(TLS_IE): Likewise.
	(TLS_LD): Likewise.
	(TLS_GD): Likewise.
	* sysdeps/unix/sysv/linux/i386/sysdep.h (check_consistency): Don't
	define for GCC >= 5.0.

diff --git a/ChangeLog b/ChangeLog
index d6c2d28..5937975 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2014-12-30  Andrew Senkevich  <andrew.senkevich@intel.com>
+
+       * sysdeps/i386/tls-macros.h: Include <features.h>.
+       (TLS_LE): Use non-PIC version for GCC >= 5.0.
+       (TLS_IE): Likewise.
+       (TLS_LD): Likewise.
+       (TLS_GD): Likewise.
+       * sysdeps/unix/sysv/linux/i386/sysdep.h (check_consistency): Don't
+       define for GCC >= 5.0.
+
 2014-12-30  Chris Metcalf  <cmetcalf@ezchip.com>
 
        * math/test-fenv.c (test_single_exception, set_single_exc,

diff --git a/sysdeps/i386/tls-macros.h b/sysdeps/i386/tls-macros.h
index 0b85738..053cba0 100644 (file)
--- a/sysdeps/i386/tls-macros.h
+++ b/sysdeps/i386/tls-macros.h
@@ -1,3 +1,5 @@
+#include <features.h> /* For __GNUC_PREREQ.  */
+
 #define TLS_LE(x) \
   ({ int *__l;                                                               \
      asm ("movl %%gs:0,%0\n\t"                                               \
@@ -5,7 +7,7 @@
          : "=r" (__l));                                                      \
      __l; })
 
-#ifdef PIC
+#if defined PIC && !__GNUC_PREREQ (5,0)
 # define TLS_IE(x) \
   ({ int *__l;                                                               \
      asm ("movl %%gs:0,%0\n\t"                                               \
@@ -27,7 +29,7 @@
      __l; })
 #endif
 
-#ifdef PIC
+#if defined PIC && !__GNUC_PREREQ (5,0)
 # define TLS_LD(x) \
   ({ int *__l, __c, __d;                                                     \
      asm ("leal " #x "@tlsldm(%%ebx),%%eax\n\t"                                      \
@@ -51,7 +53,7 @@
      __l; })
 #endif
 
-#ifdef PIC
+#if defined PIC && !__GNUC_PREREQ (5,0)
 # define TLS_GD(x) \
   ({ int *__l, __c, __d;                                                     \
      asm ("leal " #x "@tlsgd(%%ebx),%%eax\n\t"                               \

diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h
index d751c58..b574418 100644 (file)
--- a/sysdeps/unix/sysv/linux/i386/sysdep.h
+++ b/sysdeps/unix/sysv/linux/i386/sysdep.h
@@ -502,7 +502,7 @@ asm (".L__X'%ebx = 1\n\t"
 #endif
 
 /* Consistency check for position-independent code.  */
-#ifdef __PIC__
+#if defined __PIC__ && !__GNUC_PREREQ (5,0)
 # define check_consistency()                                                 \
   ({ int __res;                                                                      \
      __asm__ __volatile__                                                    \