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Diffstat (limited to 'gcc/config/vax/vms.h')
| -rw-r--r-- | gcc/config/vax/vms.h | 359 |
1 files changed, 0 insertions, 359 deletions
diff --git a/gcc/config/vax/vms.h b/gcc/config/vax/vms.h deleted file mode 100644 index d8580b5c1a1..00000000000 --- a/gcc/config/vax/vms.h +++ /dev/null @@ -1,359 +0,0 @@ -/* Output variables, constants and external declarations, for GNU compiler. - Copyright (C) 1988, 1994, 1995, 1996, 1997 Free Software Foundation, Inc. - -This file is part of GNU CC. - -GNU CC 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. - -GNU CC 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 GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ - -#define VMS_TARGET - -/* This enables certain macros in vax.h, which will make an indirect - reference to an external symbol an invalid address. This needs to be - defined before we include vax.h, since it determines which macros - are used for GO_IF_*. */ - -#define NO_EXTERNAL_INDIRECT_ADDRESS - -#include "vax/vax.h" - -#undef LIB_SPEC -#undef CPP_PREDEFINES -#undef TARGET_NAME -#undef TARGET_DEFAULT -#undef CALL_USED_REGISTERS -#undef MAYBE_VMS_FUNCTION_PROLOGUE -#undef STARTING_FRAME_OFFSET - -/* Predefine this in CPP because VMS limits the size of command options - and GNU CPP is not used on VMS except with GNU C. */ -#define CPP_PREDEFINES \ -"-Dvax -Dvms -DVMS -D__vax__ -D__vms__ -D__VMS__\ - -D__GNUC__=2 -D__GNUC_MINOR__=7 -Asystem(vms) -Acpu(vax) -Amachine(vax)" - -/* These match the definitions used in VAXCRTL, the VMS C run-time library */ - -#define SIZE_TYPE "unsigned int" -#define PTRDIFF_TYPE "int" -#define WCHAR_TYPE "unsigned int" -#define WCHAR_TYPE_SIZE 32 /* in bits */ - -/* Use memcpy for structure copying, and so forth. */ -#define TARGET_MEM_FUNCTIONS - -/* Strictly speaking, VMS does not use DBX at all, but the interpreter built - into gas only speaks straight DBX. */ - -#define DEFAULT_GDB_EXTENSIONS 0 - -#define TARGET_DEFAULT 1 -#define TARGET_NAME "vax/vms" - -/* The structure return address arrives as an "argument" on VMS. */ -#undef STRUCT_VALUE_REGNUM -#define STRUCT_VALUE 0 -#undef PCC_STATIC_STRUCT_RETURN - -#define CALL_USED_REGISTERS {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1} - -/* The run-time library routine VAXC$ESTABLISH (necessary when mixing - VMS exception handling and setjmp/longjmp in the same program) requires - that a hidden automatic variable at the top of the stack be reserved - for its use. We accomplish this by simply adding 4 bytes to the local - stack for all functions, and making sure that normal local variables - are 4 bytes lower on the stack then they would otherwise have been. */ - -#define STARTING_FRAME_OFFSET -4 - -#define __MAIN_NAME " main(" -/* - * The MAYBE_VMS_FUNCTION_PROLOGUE macro works for both gcc and g++. It - * first checks to see if the current routine is "main", which will only - * happen for GCC, and add the jsb if it is. If is not the case then try and - * see if __MAIN_NAME is part of current_function_name, which will only happen - * if we are running g++, and add the jsb if it is. In gcc there should never - * be a paren in the function name, and in g++ there is always a "(" in the - * function name, thus there should never be any confusion. - * - * Adjusting the stack pointer by 4 before calling C$MAIN_ARGS is required - * when linking with the VMS POSIX version of the C run-time library; using - * `subl2 $4,r0' is adequate but we use `clrl -(sp)' instead. The extra 4 - * bytes could be removed after the call because STARTING_FRAME_OFFSET's - * setting of -4 will end up adding them right back again, but don't bother. - */ -#define MAYBE_VMS_FUNCTION_PROLOGUE(FILE) \ -{ extern char *current_function_name; \ - char *p = current_function_name; \ - int is_main = strcmp ("main", p) == 0; \ - while (!is_main && *p != '\0') \ - { \ - if (*p == *__MAIN_NAME \ - && strncmp (p, __MAIN_NAME, sizeof __MAIN_NAME - sizeof "") == 0) \ - is_main = 1; \ - else \ - p++; \ - } \ - if (is_main) \ - fprintf (FILE, "\t%s\n\t%s\n", "clrl -(sp)", "jsb _C$MAIN_ARGS"); \ -} - -/* This macro definition sets up a default value for `main' to return. */ -#define DEFAULT_MAIN_RETURN c_expand_return (integer_one_node) - -/* This makes use of a hook in varasm.c to mark all external variables - for us. We use this to make sure that external variables are correctly - addressed. Under VMS there is some brain damage in the linker that requires - us to do this. */ - -#define ENCODE_SECTION_INFO(decl) \ - if (DECL_EXTERNAL (decl) && TREE_PUBLIC (decl)) \ - SYMBOL_REF_FLAG (XEXP (DECL_RTL (decl), 0)) = 1; - -/* This is how to output a command to make the user-level label named NAME - defined for reference from other files. */ - -#undef ASM_GLOBALIZE_LABEL -#define ASM_GLOBALIZE_LABEL(FILE,NAME) \ - do { fputs (".globl ", FILE); \ - assemble_name (FILE, NAME); \ - fputs ("\n", FILE); \ - vms_check_external (NULL_TREE, NAME, 0); \ - } while (0) - -/* Under VMS we write the actual size of the storage to be allocated even - though the symbol is external. Although it is possible to give external - symbols a size of 0 (as unix does), the VMS linker does not make the - distinction between a variable definition and an external reference of a - variable, and thus the linker will not complain about a missing definition. - If we followed the unix example of giving external symbols a size of - zero, you tried to link a program where a given variable was externally - defined but none of the object modules contained a non-extern definition, - the linker would allocate 0 bytes for the variable, and any attempt to - use that variable would use the storage allocated to some other variable. - - We must also select either const_section or data_section: this will indicate - whether or not the variable will get the readonly bit set. Since the - VMS linker does not distinguish between a variable's definition and an - external reference, all usages of a given variable must have the readonly - bit set the same way, or the linker will get confused and give warning - messages. */ - -/* We used to round the size up to a multiple of 4, - but that causes linker errors sometimes when the variable was initialized - since the size of its definition was not likewise rounded up. */ - -/* Note: the original ASM_OUTPUT_EXTERNAL code has been moved into - vms_check_external and vms_flush_pending_externals. */ - -#define ASM_OUTPUT_EXTERNAL(FILE,DECL,NAME) \ -{ if (DECL_INITIAL (DECL) == 0 && TREE_CODE (DECL) != FUNCTION_DECL) \ - vms_check_external ((DECL), (NAME), 1); \ -} - -/* ASM_OUTPUT_EXTERNAL will have wait until after an initializer is - completed in order to switch sections for an external object, so - use the DECLARE_OBJECT hooks to manage deferred declarations. */ - -/* This is the default action for ASM_DECLARE_OBJECT_NAME, but if it - is explicitly defined, then ASM_FINISH_DECLARE_OBJECT will be used. */ - -#define ASM_DECLARE_OBJECT_NAME(ASM_OUT_FILE,NAME,DECL) \ - ASM_OUTPUT_LABEL ((ASM_OUT_FILE), (NAME)) - -/* We don't need to do anything special to finish the current object, but it - should now be safe to output any deferred external global declarations. */ - -#define ASM_FINISH_DECLARE_OBJECT(FILE,DECL,TOPLVL,ATEND) \ - vms_flush_pending_externals(FILE) - -/* Anything still pending must be flushed at the very end. */ - -#define ASM_FILE_END(STREAM) \ - vms_flush_pending_externals(STREAM) - -/* Here we redefine ASM_OUTPUT_COMMON to select the data_section or the - const_section before writing the ".const" assembler directive. - If we were specifying a size of zero for external variables, we would - not have to select a section, since the assembler can assume that - when the size > 0, the storage is for a non-external, uninitialized - variable (for which a "const" declaration would be senseless), - and the assembler can make the storage read/write. - - Since the ".const" directive specifies the actual size of the storage used - for both external and non-external variables, the assembler cannot - make this assumption, and thus it has no way of deciding if storage should - be read/write or read-only. To resolve this, we give the assembler some - assistance, in the form of a ".const" or a ".data" directive. - - Under GCC 1.40, external variables were declared with a size of zero. - The GNU assembler, GAS, will recognize the "-2" switch when built for VMS; - when compiling programs with GCC 2.n this switch should be used or the - assembler will not give the read-only attribute to external constants. - Failure to use this switch will result in linker warning messages about - mismatched psect attributes. */ - -#undef ASM_OUTPUT_COMMON - -#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ -( ((TREE_READONLY (decl) && ! TREE_THIS_VOLATILE (decl)) \ - ? (const_section (), 0) : (data_section (), 0)), \ - fputs (".comm ", (FILE)), \ - assemble_name ((FILE), (NAME)), \ - fprintf ((FILE), ",%u\n", (SIZE))) - -/* We define this to prevent the name mangler from putting dollar signs into - function names. This isn't really needed, but it has been here for - some time and removing it would cause the object files generated by the - compiler to be incompatible with the object files from a compiler that - had this defined. Since it does no harm, we leave it in. */ - -#define NO_DOLLAR_IN_LABEL - -/* Add a "const" section. This is viewed by the assembler as being nearly - the same as the "data" section, with the only difference being that a - flag is set for variables declared while in the const section. This - flag is used to determine whether or not the read/write bit should be - set in the Psect definition. */ - -#define EXTRA_SECTIONS in_const - -#define EXTRA_SECTION_FUNCTIONS \ -void \ -const_section () \ -{ \ - if (in_section != in_const) { \ - fprintf(asm_out_file,".const\n"); \ - in_section = in_const; \ - } \ -} - -/* This macro contains the logic to decide which section a variable - should be stored in. Static constant variables go in the text_section, - non-const variables go in the data_section, and non-static const - variables go in the const_section. - - Since this macro is used in a number of places, we must also be able - to decide where to place string constants. */ - -#define SELECT_SECTION(T,RELOC) \ -{ \ - if (TREE_CODE (T) == VAR_DECL) \ - { \ - if (TREE_READONLY (T) && ! TREE_THIS_VOLATILE (T) \ - && DECL_INITIAL (T) \ - && (DECL_INITIAL (T) == error_mark_node \ - || TREE_CONSTANT (DECL_INITIAL (T)))) \ - { \ - if (TREE_PUBLIC (T)) \ - const_section (); \ - else \ - text_section (); \ - } \ - else \ - data_section (); \ - } \ - if (*tree_code_type[(int) TREE_CODE (T)] == 'c') \ - { \ - if ((TREE_CODE (T) == STRING_CST && flag_writable_strings)) \ - data_section (); \ - else \ - text_section (); \ - } \ -} - -/* This is used by a hook in varasm.c to write the assembler directives - that are needed to tell the startup code which constructors need to - be run. */ - -#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \ -{ \ - fprintf ((FILE),".globl $$PsectAttributes_NOOVR$$__gxx_init_1\n"); \ - data_section(); \ - fprintf ((FILE),"$$PsectAttributes_NOOVR$$__gxx_init_1:\n\t.long\t"); \ - assemble_name ((FILE), (NAME)); \ - fputc ('\n', (FILE)); \ -} - -/* This is used by a hook in varasm.c to write the assembler directives - that are needed to tell the startup code which destructors need to - be run. */ - -#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \ -{ \ - fprintf ((FILE),".globl $$PsectAttributes_NOOVR$$__gxx_clean_1\n"); \ - data_section(); \ - fprintf ((FILE),"$$PsectAttributes_NOOVR$$__gxx_clean_1:\n\t.long\t");\ - assemble_name ((FILE), (NAME)); \ - fputc ('\n', (FILE)); \ -} - -/* True for VMS V4.6 and later. */ -#define HAVE_ATEXIT - -/* The following definitions are used in libgcc2.c with the __main - function. The _SHR symbol is used when the sharable image library - for libg++ is used - this is picked up automatically by the linker - and this symbol points to the start of the __CTOR_LIST__ from libg++. - If libg++ is not being used, then __CTOR_LIST_SHR__ occurs just after - __CTOR_LIST__, and essentially points to the same list as __CTOR_LIST. */ - -#ifdef L__main - -#define __CTOR_LIST__ __gxx_init_0 -#define __CTOR_LIST_END__ __gxx_init_2 - -#define __CTOR_LIST_SHR__ $$PsectAttributes_NOSHR$$__gxx_init_0_shr -#define __CTOR_LIST_SHR_END__ $$PsectAttributes_NOSHR$$__gxx_init_2_shr - -#define DO_GLOBAL_CTORS_BODY \ -do { \ - func_ptr *p; \ - extern func_ptr __CTOR_LIST__[1], __CTOR_LIST_END__[1]; \ - extern func_ptr __CTOR_LIST_SHR__[1], __CTOR_LIST_SHR_END__[1]; \ - if (&__CTOR_LIST_SHR__[0] != &__CTOR_LIST__[1]) \ - for (p = __CTOR_LIST_SHR__ + 1; p < __CTOR_LIST_SHR_END__ ; p++ ) \ - if (*p) (*p) (); \ - for (p = __CTOR_LIST__ + 1; p < __CTOR_LIST_END__ ; p++ ) \ - if (*p) (*p) (); \ - do { /* arrange for `return' from main() to pass through exit() */ \ - __label__ foo; \ - int *callers_caller_fp = (int *) __builtin_frame_address (3); \ - register int retval asm ("r0"); \ - callers_caller_fp[4] = (int) && foo; \ - break; /* out of do-while block */ \ - foo: \ - exit (retval); \ - } while (0); \ -} while (0) - -#define __DTOR_LIST__ __gxx_clean_0 -#define __DTOR_LIST_END__ __gxx_clean_2 - -#define __DTOR_LIST_SHR__ $$PsectAttributes_NOSHR$$__gxx_clean_0_shr -#define __DTOR_LIST_SHR_END__ $$PsectAttributes_NOSHR$$__gxx_clean_2_shr - -#define DO_GLOBAL_DTORS_BODY \ -do { \ - func_ptr *p; \ - extern func_ptr __DTOR_LIST__[1], __DTOR_LIST_END__[1]; \ - extern func_ptr __DTOR_LIST_SHR__[1], __DTOR_LIST_SHR_END__[1]; \ - for (p = __DTOR_LIST__ + 1; p < __DTOR_LIST_END__ ; p++ ) \ - if (*p) (*p) (); \ - if (&__DTOR_LIST_SHR__[0] != &__DTOR_LIST__[1]) \ - for (p = __DTOR_LIST_SHR__ + 1; p < __DTOR_LIST_SHR_END__ ; p++ ) \ - if (*p) (*p) (); \ -} while (0) - -#endif /* L__main */ |