svn commit: trunk/uClibc/libc/sysdeps/linux/arm

[aldot at uclibc.org]

Author: aldot
Date: 2008-11-25 04:26:42 -0800 (Tue, 25 Nov 2008)
New Revision: 24138

Log:
- Fix thumb2 PIE (Joseph S. Myers)
  This patch fixes position-independent executables (PIEs) for Thumb-2.  In
  Thumb assembly, instructions reading pc give a value 4 greater than the
  address of the instruction, rather than 8 greater as in ARM mode, so the
  offset to the GOT needs to have the right offset.  (The Thumb-1 code
  already gets this right; it's the code shared by ARM and Thumb-2 that
  needs fixing.)


Modified:
   trunk/uClibc/libc/sysdeps/linux/arm/crt1.S


Changeset:
Modified: trunk/uClibc/libc/sysdeps/linux/arm/crt1.S
===================================================================
--- trunk/uClibc/libc/sysdeps/linux/arm/crt1.S	2008-11-25 01:36:03 UTC (rev 24137)
+++ trunk/uClibc/libc/sysdeps/linux/arm/crt1.S	2008-11-25 12:26:42 UTC (rev 24138)
@@ -238,7 +238,11 @@
 
 #ifdef __PIC__
 .L_GOT:
+#ifdef __thumb__
+	.word	_GLOBAL_OFFSET_TABLE_-(.L_GOT_OFF+4)
+#else /* __thumb2__ */
 	.word	_GLOBAL_OFFSET_TABLE_-(.L_GOT_OFF+8)
+#endif
 	.word _fini(GOT)
 	.word _init(GOT)
 	.word main(GOT)