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| author | Mark Mitchell <mark@codesourcery.com> | 2004-11-24 14:35:31 +0000 |
|---|---|---|
| committer | Joseph Myers <jsm28@gcc.gnu.org> | 2004-11-24 14:35:31 +0000 |
| commit | 1a35e62db38e212a6ec713b10d37b4d67e0e04d8 (patch) | |
| tree | fd5df5cbebf2f9c06f98b70a94d7cce4d7792239 /gcc/defaults.h | |
| parent | f78ce0c2f31182305ffe14ed95c4b4a18cb0d906 (diff) | |
| download | gcc-1a35e62db38e212a6ec713b10d37b4d67e0e04d8.zip gcc-1a35e62db38e212a6ec713b10d37b4d67e0e04d8.tar.gz gcc-1a35e62db38e212a6ec713b10d37b4d67e0e04d8.tar.bz2 | |
crtstuff.c (IN_LIBGCC2): Define it.
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.
Co-Authored-By: Joseph Myers <joseph@codesourcery.com>
From-SVN: r91160
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 1e1bdc8..daa584a 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. */ |