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Diffstat (limited to 'gcc/eh-common.h')
| -rw-r--r-- | gcc/eh-common.h | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/gcc/eh-common.h b/gcc/eh-common.h deleted file mode 100644 index dffe682..0000000 --- a/gcc/eh-common.h +++ /dev/null @@ -1,162 +0,0 @@ -/* EH stuff - Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. - -This file is part of GNU CC. - -This program is free software; you can redistribute it and/or modify it -under the terms of the GNU General Public License as published by the -Free Software Foundation; either version 2, or (at your option) any -later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - - -/* This file contains the structures required for the language - independent exception handling model. Both the static compiler and - the runtime library share this file. */ - -/* The runtime flag flag_new_exceptions is used to determine whether the - compiler supports the new runtime typechecking mechanism or not. Under - the new model, runtime info is contained in the exception table, and - the __throw() library routine determines which handler to call based - on the results of a call to a matching function provided by the expcetion - thrower. Otherwise the old scheme of calling any handler which matches - an exception range is used, and the handler is responsible for all - checking of runtime conditions. If the handler wasn't suppose to - get the exception, it performs a re-throw. */ - - -/* The handler_label field MUST be the first field in this structure. The - __throw() library routine expects uses __eh_stub() from except.c, which - simply dereferences the context pointer to get the handler. - The routine get_dynamic_handler_chain() also has a dependancy on - the location of 'dynamic_handler_chain'. If its location is changed, - that routine must be modified as well. */ -#ifndef EH_ALLOC_SIZE -/* 192 bytes means the entire eh_context plus malloc overhead fits in 256 - bytes (assuming 8 byte pointers). 192 bytes gives an eh_info and object - size limit of 96 bytes. This should be sufficient for throwing bad_alloc. */ -#define EH_ALLOC_SIZE 192 -#endif -#ifndef EH_ALLOC_ALIGN -/* We can't use BIGGEST_ALIGNMENT, because on some systems, that expands to - a check on a compile time switch like - 'target_flags & MASK_ALIGN_DOUBLE ? 64 : 32'. There's no macro for - 'largest alignment for any code this compiler can build for', which is - really what is needed. */ -#define EH_ALLOC_ALIGN 16 -#endif - -struct eh_context -{ - void *handler_label; - void **dynamic_handler_chain; - /* This is language dependent part of the eh context. */ - void *info; - /* This is used to remember where we threw for re-throws */ - void *table_index; /* address of exception table entry to rethrow from */ - /* emergency fallback space, if malloc fails during handling */ - char alloc_buffer[EH_ALLOC_SIZE] - __attribute__((__aligned__(EH_ALLOC_ALIGN))); - unsigned alloc_mask; -}; - -#ifndef EH_TABLE_LOOKUP - -typedef struct old_exception_table -{ - void *start_region; - void *end_region; - void *exception_handler; -} old_exception_table; - -typedef struct exception_table -{ - void *start_region; - void *end_region; - void *exception_handler; - void *match_info; /* runtime type info */ -} exception_table; - - -/* The language identifying portion of an exception table */ - -typedef struct exception_lang_info -{ - short language; - short version; -} exception_lang_info; - -/* This value in the first field of the exception descriptor - identifies the descriptor as the new model format. This value would never - be present in this location under the old model */ - -#define NEW_EH_RUNTIME ((void *) -2) - -/* Each function has an exception_descriptor which contains the - language info, and a table of exception ranges and handlers */ - -typedef struct exception_descriptor -{ - void *runtime_id_field; - exception_lang_info lang; - exception_table table[1]; -} exception_descriptor; - -struct __eh_info; /* forward declaration */ - -/* A pointer to a matching function is initialized at runtime by the - specific language if run-time exceptions are supported. - The function takes 3 parameters - 1 - runtime exception that has been thrown info. (__eh_info *) - 2 - Match info pointer from the region being considered (void *) - 3 - exception table region is in (exception descriptor *) -*/ - -typedef void * (*__eh_matcher) PARAMS ((struct __eh_info *, void *, - struct exception_descriptor *)); - -/* This value is to be checked as a 'match all' case in the runtime field. */ - -#define CATCH_ALL_TYPE ((void *) -1) - -/* This is the runtime exception information. This forms the minimum required - information for an exception info pointer in an eh_context structure. */ - - -typedef struct __eh_info -{ - __eh_matcher match_function; - short language; - short version; -} __eh_info; - -/* Convienient language codes for ID the originating language. Similar - to the codes in dwarf2.h. */ - -enum exception_source_language - { - EH_LANG_C89 = 0x0001, - EH_LANG_C = 0x0002, - EH_LANG_Ada83 = 0x0003, - EH_LANG_C_plus_plus = 0x0004, - EH_LANG_Cobol74 = 0x0005, - EH_LANG_Cobol85 = 0x0006, - EH_LANG_Fortran77 = 0x0007, - EH_LANG_Fortran90 = 0x0008, - EH_LANG_Pascal83 = 0x0009, - EH_LANG_Modula2 = 0x000a, - EH_LANG_Java = 0x000b, - EH_LANG_Mips_Assembler = 0x8001 - }; - -#endif /* EH_TABLE_LOOKUP */ - - |