diff options
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. */ |