提交: ded49c3ea35a4068b5a78aee7487bf867fa42de8 - binutils_os216 (git)

GNU Binutils with patches for OS216

Commit MetaInfo

• 修订版: ded49c3ea35a4068b5a78aee7487bf867fa42de8 (tree)
• 时间: 2008-09-08 09:54:26
• 作者: Dave Anglin <dave.anglin@nrc....>
• Commiter: Dave Anglin

Log Message

* config/tc-hppa.h (DIFF_EXPR_OK): Define for SOM target. Revise
comment regarding use of difference expressions.
(TC_FORCE_RELOCATION_SUB_LOCAL): Define to 1.

更改概述

• modified: gas/ChangeLog
• modified: gas/config/tc-hppa.h

差异

--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,5 +1,9 @@
 2008-09-07  John David Anglin  <[e-mail]>
 
+	* config/tc-hppa.h (DIFF_EXPR_OK): Define for SOM target.  Revise
+	comment regarding use of difference expressions.
+	(TC_FORCE_RELOCATION_SUB_LOCAL): Define to 1.
+
 	* dw2gencfi.c (CFI_DIFF_EXPR_OK): Define if not defined.
 	(dot_cfi_personality): Use CFI_DIFF_EXPR_OK instead of DIFF_EXPR_OK.
 	(dot_cfi_lsda, output_cie, output_fde): Likewise.

--- a/gas/config/tc-hppa.h
+++ b/gas/config/tc-hppa.h
@@ -146,14 +146,23 @@ int hppa_fix_adjustable (struct fix *);
    two symbols.  This includes the difference of two symbols when
    one of them is undefined (this comes up in PIC code generation).
 
-   We don't define DIFF_EXPR_OK because it does the wrong thing if
-   the add symbol is undefined and the sub symbol is a symbol in
-   the same section as the relocation.  We also need some way to
-   specialize some code in adjust_reloc_syms.  */
+   We allow the difference of two symbols when the subtract symbol is
+   local to the relocation.  This is implemented using R_HPPA_COMPLEX.
+
+   This has some limitations.  Difference expressions only work between
+   symbols in the same segment/quadrant of a module since the HP dynamic
+   loader relocates the text and data segments independently.  Thus, a
+   difference expression can't be used between text and data symbols,
+   or between symbols in different executable modules.  */
+#define DIFF_EXPR_OK 1
+#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX) 1
 #define UNDEFINED_DIFFERENCE_OK
 #endif
 
 #ifdef OBJ_ELF
+
+/* Difference expressions for the 64-bit HP-UX target have the same
+   limitations as those for the 32-bit SOM target.  */
 #define DIFF_EXPR_OK 1
 
 /* Handle .type psuedo.  Given a type string of `millicode', set the