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| author | jsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-11-24 14:35:31 +0000 |
|---|---|---|
| committer | jsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-11-24 14:35:31 +0000 |
| commit | 51601538b89a6ff580a04fa26cb47c1822a74629 (patch) | |
| tree | fd5df5cbebf2f9c06f98b70a94d7cce4d7792239 /gcc/defaults.h | |
| parent | 6e11b263c7a7f614c5a57af09ff9c2aa2fc58a30 (diff) | |
| download | gcc-51601538b89a6ff580a04fa26cb47c1822a74629.tar.gz | |
2004-11-24 Mark Mitchell <mark@codesourcery.com>
Joseph Myers <joseph@codesourcery.com>
* crtstuff.c (IN_LIBGCC2): Define it.
(EH_FRAME_SECTION_CONST): Check EH_TABLES_CAN_BE_READ_ONLY
instead of HAVE_LD_RO_RW_SECTION_MIXING.
* defaults.h (EH_TABLES_CAN_BE_READ_ONLY): New macro.
* dwarf2out.c (named_section_eh_frame_section): Check
EH_TABLES_CAN_BE_READ_ONLY.
* except.c (default_exception_section): Likewise.
* config/i386/sol2.h (EH_TABLES_CAN_BE_READ_ONLY): Define.
* doc/tm.texi (EH_TABLES_CAN_BE_READ_ONLY): Document.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@91160 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/defaults.h')
| -rw-r--r-- | gcc/defaults.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/defaults.h b/gcc/defaults.h index 1e1bdc87e08..daa584a25ce 100644 --- a/gcc/defaults.h +++ b/gcc/defaults.h @@ -310,6 +310,26 @@ do { fputs (integer_asm_op (POINTER_SIZE / BITS_PER_UNIT, TRUE), FILE); \ #endif #endif +/* On many systems, different EH table encodings are used under + difference circumstances. Some will require runtime relocations; + some will not. For those that do not require runtime relocations, + we would like to make the table read-only. However, since the + read-only tables may need to be combined with read-write tables + that do require runtime relocation, it is not safe to make the + tables read-only unless the linker will merge read-only and + read-write sections into a single read-write section. If your + linker does not have this ability, but your system is such that no + encoding used with non-PIC code will ever require a runtime + relocation, then you can define EH_TABLES_CAN_BE_READ_ONLY to 1 in + your target configuration file. */ +#ifndef EH_TABLES_CAN_BE_READ_ONLY +#ifdef HAVE_LD_RO_RW_SECTION_MIXING +#define EH_TABLES_CAN_BE_READ_ONLY 1 +#else +#define EH_TABLES_CAN_BE_READ_ONLY 0 +#endif +#endif + /* If we have named section and we support weak symbols, then use the .jcr section for recording java classes which need to be registered at program start-up time. */ |