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authorUlrich Drepper <drepper@redhat.com>2005-02-08 06:48:30 +0000
committerUlrich Drepper <drepper@redhat.com>2005-02-08 06:48:30 +0000
commitdbfc1e02671b7ed137272af79751b534613a9326 (patch)
tree92e0de6a9dd622102f766a1519b84dd29ee72694 /sysdeps
parentbc82059d34cc5679b5bdaf854b864de3eb0562db (diff)
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(check_consistency): Define.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/unix/sysv/linux/i386/sysdep.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h
index cfa030b..6bea9d2 100644
--- a/sysdeps/unix/sysv/linux/i386/sysdep.h
+++ b/sysdeps/unix/sysv/linux/i386/sysdep.h
@@ -540,6 +540,29 @@ asm (".L__X'%ebx = 1\n\t"
# define EXTRAVAR_5
#endif
+/* Consistency check for position-independent code. */
+#ifdef __PIC__
+# define check_consistency() \
+ ({ int __res; \
+ __asm__ __volatile__ \
+ ("call __i686.get_pc_thunk.cx;" \
+ "addl $_GLOBAL_OFFSET_TABLE_, %%ecx;" \
+ "subl %%ebx, %%ecx;" \
+ "je 1f;" \
+ "ud2;" \
+ "1:\n" \
+ ".section .gnu.linkonce.t.__i686.get_pc_thunk.cx,\"ax\",@progbits;" \
+ ".globl __i686.get_pc_thunk.cx;" \
+ ".hidden __i686.get_pc_thunk.cx;" \
+ ".type __i686.get_pc_thunk.cx,@function;" \
+ "__i686.get_pc_thunk.cx:" \
+ "movl (%%esp), %%ecx;" \
+ "ret;" \
+ ".previous" \
+ : "=c" (__res)); \
+ __res; })
+#endif
+
#endif /* __ASSEMBLER__ */
#endif /* linux/i386/sysdep.h */