From: Dave Anglin Date: Mon, 8 Sep 2008 00:54:26 +0000 (+0000) Subject: * config/tc-hppa.h (DIFF_EXPR_OK): Define for SOM target. Revise X-Git-Tag: binutils-2_19-branchpoint~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ded49c3ea35a4068b5a78aee7487bf867fa42de8;p=external%2Fbinutils.git * 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. --- diff --git a/gas/ChangeLog b/gas/ChangeLog index 9237bed..d9610d3 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,5 +1,9 @@ 2008-09-07 John David Anglin + * 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. diff --git a/gas/config/tc-hppa.h b/gas/config/tc-hppa.h index 3a45e08..498cb25 100644 --- 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