521 lines
17 KiB
C
521 lines
17 KiB
C
/* Output variables, constants and external declarations, for GNU compiler.
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Copyright (C) 1996, 1997, 1998, 2000, 2001, 2002
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Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#define TARGET_OBJECT_SUFFIX ".obj"
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#define TARGET_EXECUTABLE_SUFFIX ".exe"
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/* This enables certain macros in alpha.h, which will make an indirect
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reference to an external symbol an invalid address. This needs to be
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defined before we include alpha.h, since it determines which macros
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are used for GO_IF_*. */
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#define NO_EXTERNAL_INDIRECT_ADDRESS
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#define TARGET_OS_CPP_BUILTINS() \
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do { \
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builtin_define_std ("vms"); \
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builtin_define_std ("VMS"); \
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builtin_define ("__ALPHA"); \
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builtin_assert ("system=vms"); \
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if (TARGET_FLOAT_VAX) \
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builtin_define ("__G_FLOAT"); \
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else \
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builtin_define ("__IEEE_FLOAT"); \
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} while (0)
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/* By default, allow $ to be part of an identifier. */
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#define DOLLARS_IN_IDENTIFIERS 2
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#undef TARGET_DEFAULT
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#define TARGET_DEFAULT (MASK_FP|MASK_FPREGS|MASK_GAS)
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#undef TARGET_ABI_OPEN_VMS
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#define TARGET_ABI_OPEN_VMS 1
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#undef TARGET_NAME
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#define TARGET_NAME "OpenVMS/Alpha"
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#undef TARGET_VERSION
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#define TARGET_VERSION fprintf (stderr, " (%s)", TARGET_NAME);
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/* The structure return address arrives as an "argument" on VMS. */
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#undef STRUCT_VALUE_REGNUM
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#define STRUCT_VALUE 0
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#undef PCC_STATIC_STRUCT_RETURN
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/* "long" is 32 bits, but 64 bits for Ada. */
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#undef LONG_TYPE_SIZE
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#define LONG_TYPE_SIZE 32
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#define ADA_LONG_TYPE_SIZE 64
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/* Pointer is 32 bits but the hardware has 64-bit addresses, sign extended. */
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#undef POINTER_SIZE
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#define POINTER_SIZE 32
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#define POINTERS_EXTEND_UNSIGNED 0
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#define MAX_OFILE_ALIGNMENT 524288 /* 8 x 2^16 by DEC Ada Test CD40VRA */
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#undef FIXED_REGISTERS
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#define FIXED_REGISTERS \
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{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }
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#undef CALL_USED_REGISTERS
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#define CALL_USED_REGISTERS \
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{1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
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1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
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/* List the order in which to allocate registers. Each register must be
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listed once, even those in FIXED_REGISTERS.
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We allocate in the following order:
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$f1 (nonsaved floating-point register)
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$f10-$f15 (likewise)
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$f22-$f30 (likewise)
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$f21-$f16 (likewise, but input args)
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$f0 (nonsaved, but return value)
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$f2-$f9 (saved floating-point registers)
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$1 (nonsaved integer registers)
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$22-$25 (likewise)
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$28 (likewise)
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$0 (likewise, but return value)
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$21-$16 (likewise, but input args)
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$27 (procedure value in OSF, nonsaved in NT)
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$2-$8 (saved integer registers)
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$9-$14 (saved integer registers)
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$26 (return PC)
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$15 (frame pointer)
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$29 (global pointer)
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$30, $31, $f31 (stack pointer and always zero/ap & fp) */
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#undef REG_ALLOC_ORDER
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#define REG_ALLOC_ORDER \
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{33, \
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42, 43, 44, 45, 46, 47, \
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54, 55, 56, 57, 58, 59, 60, 61, 62, \
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53, 52, 51, 50, 49, 48, \
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32, \
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34, 35, 36, 37, 38, 39, 40, 41, \
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1, \
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22, 23, 24, 25, \
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28, \
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0, \
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21, 20, 19, 18, 17, 16, \
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27, \
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2, 3, 4, 5, 6, 7, 8, \
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9, 10, 11, 12, 13, 14, \
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26, \
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15, \
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29, \
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30, 31, 63 }
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#undef HARD_FRAME_POINTER_REGNUM
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#define HARD_FRAME_POINTER_REGNUM 29
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/* Define registers used by the epilogue and return instruction. */
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#undef EPILOGUE_USES
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#define EPILOGUE_USES(REGNO) ((REGNO) == 26 || (REGNO) == 29)
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#undef CAN_ELIMINATE
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#define CAN_ELIMINATE(FROM, TO) \
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((TO) != STACK_POINTER_REGNUM || ! alpha_using_fp ())
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#undef INITIAL_ELIMINATION_OFFSET
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#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
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{ if ((FROM) == FRAME_POINTER_REGNUM) \
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(OFFSET) = alpha_sa_size () + alpha_pv_save_size (); \
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else if ((FROM) == ARG_POINTER_REGNUM) \
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(OFFSET) = (ALPHA_ROUND (alpha_sa_size () + alpha_pv_save_size () \
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+ get_frame_size () \
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+ current_function_pretend_args_size) \
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- current_function_pretend_args_size); \
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else \
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abort(); \
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if ((TO) == STACK_POINTER_REGNUM) \
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(OFFSET) += ALPHA_ROUND (current_function_outgoing_args_size); \
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}
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/* Define a data type for recording info about an argument list
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during the scan of that argument list. This data type should
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hold all necessary information about the function itself
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and about the args processed so far, enough to enable macros
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such as FUNCTION_ARG to determine where the next arg should go.
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On Alpha/VMS, this is a structure that contains the number of
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arguments and, for each argument, the datatype of that argument.
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The number of arguments is a number of words of arguments scanned so far.
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Thus 6 or more means all following args should go on the stack. */
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enum avms_arg_type {I64, FF, FD, FG, FS, FT};
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typedef struct {int num_args; enum avms_arg_type atypes[6];} avms_arg_info;
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#undef CUMULATIVE_ARGS
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#define CUMULATIVE_ARGS avms_arg_info
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/* Initialize a variable CUM of type CUMULATIVE_ARGS
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for a call to a function whose data type is FNTYPE.
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For a library call, FNTYPE is 0. */
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#undef INIT_CUMULATIVE_ARGS
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#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \
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(CUM).num_args = 0; \
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(CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64; \
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(CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64;
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#undef FUNCTION_ARG_ADVANCE
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#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
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if (MUST_PASS_IN_STACK (MODE, TYPE)) \
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(CUM).num_args += 6; \
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else \
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{ \
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if ((CUM).num_args < 6) \
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(CUM).atypes[(CUM).num_args] = alpha_arg_type (MODE); \
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\
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(CUM).num_args += ALPHA_ARG_SIZE (MODE, TYPE, NAMED); \
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}
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/* For an arg passed partly in registers and partly in memory,
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this is the number of registers used.
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For args passed entirely in registers or entirely in memory, zero. */
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#undef FUNCTION_ARG_PARTIAL_NREGS
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#define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
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((CUM).num_args < 6 && 6 < (CUM).num_args \
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+ ALPHA_ARG_SIZE (MODE, TYPE, NAMED) \
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? 6 - (CUM).num_args : 0)
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/* Perform any needed actions needed for a function that is receiving a
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variable number of arguments.
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CUM is as for INIT_CUMULATIVE_ARGS.
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MODE and TYPE are the mode and type of the current parameter.
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PRETEND_SIZE is a variable that should be set to the amount of stack
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that must be pushed by the prolog to pretend that our caller pushed
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it.
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Normally, this macro will push all remaining incoming registers on the
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stack and set PRETEND_SIZE to the length of the registers pushed.
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For VMS, we allocate space for all 6 arg registers plus a count.
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However, if NO registers need to be saved, don't allocate any space.
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This is not only because we won't need the space, but because AP includes
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the current_pretend_args_size and we don't want to mess up any
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ap-relative addresses already made. */
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#undef SETUP_INCOMING_VARARGS
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#define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL) \
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{ if ((CUM).num_args < 6) \
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{ \
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if (! (NO_RTL)) \
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{ \
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emit_move_insn (gen_rtx_REG (DImode, 1), \
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virtual_incoming_args_rtx); \
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emit_insn (gen_arg_home ()); \
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} \
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\
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PRETEND_SIZE = 7 * UNITS_PER_WORD; \
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} \
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}
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/* ABI has stack checking, but it's broken. */
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#undef STACK_CHECK_BUILTIN
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#define STACK_CHECK_BUILTIN 0
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#undef ASM_FILE_START
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#define ASM_FILE_START(FILE) \
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{ \
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alpha_write_verstamp (FILE); \
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fprintf (FILE, "\t.set noreorder\n"); \
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fprintf (FILE, "\t.set volatile\n"); \
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if (TARGET_BWX | TARGET_MAX | TARGET_FIX | TARGET_CIX) \
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{ \
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fprintf (FILE, "\t.arch %s\n", \
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(TARGET_CPU_EV6 ? "ev6" \
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: TARGET_MAX ? "pca56" : "ev56")); \
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} \
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ASM_OUTPUT_SOURCE_FILENAME (FILE, main_input_filename); \
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}
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#define LINK_SECTION_ASM_OP "\t.link"
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#define READONLY_DATA_SECTION_ASM_OP "\t.rdata"
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#define LITERALS_SECTION_ASM_OP "\t.literals"
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#define CTORS_SECTION_ASM_OP "\t.ctors"
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#define DTORS_SECTION_ASM_OP "\t.dtors"
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#undef EXTRA_SECTIONS
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#define EXTRA_SECTIONS in_link, in_literals
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#undef EXTRA_SECTION_FUNCTIONS
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#define EXTRA_SECTION_FUNCTIONS \
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void \
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link_section () \
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{ \
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if (in_section != in_link) \
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{ \
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fprintf (asm_out_file, "%s\n", LINK_SECTION_ASM_OP); \
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in_section = in_link; \
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} \
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} \
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void \
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literals_section () \
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{ \
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if (in_section != in_literals) \
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{ \
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fprintf (asm_out_file, "%s\n", LITERALS_SECTION_ASM_OP); \
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in_section = in_literals; \
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} \
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}
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extern void link_section PARAMS ((void));
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extern void literals_section PARAMS ((void));
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#undef ASM_OUTPUT_ADDR_DIFF_ELT
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#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) abort ()
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#undef ASM_OUTPUT_ADDR_VEC_ELT
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#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
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fprintf (FILE, "\t.quad $L%d\n", (VALUE))
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#undef CASE_VECTOR_MODE
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#define CASE_VECTOR_MODE DImode
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#undef CASE_VECTOR_PC_RELATIVE
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#undef ASM_OUTPUT_CASE_LABEL
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#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \
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{ ASM_OUTPUT_ALIGN (FILE, 3); ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); }
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/* This says how to output assembler code to declare an
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uninitialized external linkage data object. */
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#define COMMON_ASM_OP "\t.comm\t"
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#undef ASM_OUTPUT_ALIGNED_COMMON
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#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
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do { \
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fprintf ((FILE), "%s", COMMON_ASM_OP); \
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assemble_name ((FILE), (NAME)); \
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fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
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} while (0)
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/* Output assembler code for a block containing the constant parts
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of a trampoline, leaving space for the variable parts.
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The trampoline should set the static chain pointer to value placed
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into the trampoline and should branch to the specified routine.
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Note that $27 has been set to the address of the trampoline, so we can
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use it for addressability of the two data items. */
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#undef TRAMPOLINE_TEMPLATE
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#define TRAMPOLINE_TEMPLATE(FILE) \
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{ \
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fprintf (FILE, "\t.quad 0\n"); \
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fprintf (FILE, "\t.linkage __tramp\n"); \
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fprintf (FILE, "\t.quad 0\n"); \
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}
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/* Length in units of the trampoline for entering a nested function. */
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#undef TRAMPOLINE_SIZE
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#define TRAMPOLINE_SIZE 32
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/* The alignment of a trampoline, in bits. */
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#undef TRAMPOLINE_ALIGNMENT
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#define TRAMPOLINE_ALIGNMENT 64
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/* Emit RTL insns to initialize the variable parts of a trampoline.
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FNADDR is an RTX for the address of the function's pure code.
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CXT is an RTX for the static chain value for the function. */
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#undef INITIALIZE_TRAMPOLINE
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#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
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alpha_initialize_trampoline (TRAMP, FNADDR, CXT, 16, 24, -1)
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/* Control how constructors and destructors are emitted. */
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#define TARGET_ASM_CONSTRUCTOR vms_asm_out_constructor
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#define TARGET_ASM_DESTRUCTOR vms_asm_out_destructor
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#undef SDB_DEBUGGING_INFO
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#undef MIPS_DEBUGGING_INFO
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#undef DBX_DEBUGGING_INFO
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#define DWARF2_DEBUGGING_INFO 1
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#define VMS_DEBUGGING_INFO 1
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#define DWARF2_UNWIND_INFO 1
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#undef EH_RETURN_HANDLER_RTX
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#define EH_RETURN_HANDLER_RTX \
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gen_rtx_MEM (Pmode, plus_constant (stack_pointer_rtx, 8))
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#define LINK_EH_SPEC "vms-dwarf2eh.o%s "
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#ifdef IN_LIBGCC2
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#include <pdscdef.h>
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#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
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do { \
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PDSCDEF *pv = *((PDSCDEF **) (CONTEXT)->reg [29]); \
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\
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if (pv && ((long) pv & 0x7) == 0) /* low bits 0 means address */ \
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pv = *(PDSCDEF **) pv; \
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\
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if (pv && ((pv->pdsc$w_flags & 0xf) == PDSC$K_KIND_FP_STACK)) \
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{ \
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int i, j; \
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\
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(FS)->cfa_offset = pv->pdsc$l_size; \
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(FS)->cfa_reg = pv->pdsc$w_flags & PDSC$M_BASE_REG_IS_FP ? 29 : 30; \
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(FS)->retaddr_column = 26; \
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(FS)->cfa_how = CFA_REG_OFFSET; \
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(FS)->regs.reg[27].loc.offset = -pv->pdsc$l_size; \
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(FS)->regs.reg[27].how = REG_SAVED_OFFSET; \
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(FS)->regs.reg[26].loc.offset \
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= -(pv->pdsc$l_size - pv->pdsc$w_rsa_offset); \
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(FS)->regs.reg[26].how = REG_SAVED_OFFSET; \
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\
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for (i = 0, j = 0; i < 32; i++) \
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if (1<<i & pv->pdsc$l_ireg_mask) \
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{ \
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(FS)->regs.reg[i].loc.offset \
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= -(pv->pdsc$l_size - pv->pdsc$w_rsa_offset - 8 * ++j); \
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(FS)->regs.reg[i].how = REG_SAVED_OFFSET; \
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} \
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\
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goto SUCCESS; \
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} \
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else if (pv && ((pv->pdsc$w_flags & 0xf) == PDSC$K_KIND_FP_REGISTER)) \
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{ \
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(FS)->cfa_offset = pv->pdsc$l_size; \
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(FS)->cfa_reg = pv->pdsc$w_flags & PDSC$M_BASE_REG_IS_FP ? 29 : 30; \
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(FS)->retaddr_column = 26; \
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(FS)->cfa_how = CFA_REG_OFFSET; \
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(FS)->regs.reg[26].loc.reg = pv->pdsc$b_save_ra; \
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(FS)->regs.reg[26].how = REG_SAVED_REG; \
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(FS)->regs.reg[29].loc.reg = pv->pdsc$b_save_fp; \
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(FS)->regs.reg[29].how = REG_SAVED_REG; \
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\
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goto SUCCESS; \
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} \
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} while (0)
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#endif
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/* This is how to output an assembler line
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that says to advance the location counter
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to a multiple of 2**LOG bytes. */
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#undef ASM_OUTPUT_ALIGN
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#define ASM_OUTPUT_ALIGN(FILE,LOG) \
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fprintf (FILE, "\t.align %d\n", LOG);
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/* Switch into a generic section. */
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#define TARGET_ASM_NAMED_SECTION vms_asm_named_section
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#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
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do { literals_section(); \
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fprintf ((FILE), "\t"); \
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assemble_name (FILE, LABEL1); \
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fprintf (FILE, " = "); \
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assemble_name (FILE, LABEL2); \
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fprintf (FILE, "\n"); \
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} while (0)
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#undef PREFERRED_DEBUGGING_TYPE
|
||
#define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
|
||
|
||
#undef ASM_FORMAT_PRIVATE_NAME
|
||
#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
|
||
( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 12), \
|
||
sprintf ((OUTPUT), "%s___%d", (NAME), (LABELNO)))
|
||
|
||
/* ??? VMS uses different linkage. */
|
||
#undef TARGET_ASM_OUTPUT_MI_THUNK
|
||
|
||
#undef ASM_SPEC
|
||
#undef ASM_FINAL_SPEC
|
||
|
||
/* The VMS convention is to always provide minimal debug info
|
||
for a traceback unless specifically overridden. Defaulting this here
|
||
is a kludge. */
|
||
|
||
#define OPTIMIZATION_OPTIONS(OPTIMIZE, OPTIMIZE_SIZE) \
|
||
{ \
|
||
write_symbols = VMS_DEBUG; \
|
||
debug_info_level = (enum debug_info_level) 1; \
|
||
}
|
||
|
||
/* Override traceback debug info on -g0. */
|
||
#undef OVERRIDE_OPTIONS
|
||
#define OVERRIDE_OPTIONS \
|
||
{ \
|
||
if (write_symbols == NO_DEBUG) \
|
||
debug_info_level = (enum debug_info_level) 0; \
|
||
override_options (); \
|
||
}
|
||
|
||
/* Link with vms-dwarf2.o if -g (except -g0). This causes the
|
||
VMS link to pull all the dwarf2 debug sections together. */
|
||
#undef LINK_SPEC
|
||
#define LINK_SPEC "%{g:-g vms-dwarf2.o%s} %{g0} %{g1:-g1 vms-dwarf2.o%s} \
|
||
%{g2:-g2 vms-dwarf2.o%s} %{g3:-g3 vms-dwarf2.o%s} %{shared} %{v} %{map}"
|
||
|
||
#undef STARTFILE_SPEC
|
||
#define STARTFILE_SPEC "%{!shared:%{mvms-return-codes:vcrt0.o%s} \
|
||
%{!mvms-return-codes:pcrt0.o%s}}"
|
||
|
||
#undef LIB_SPEC
|
||
#define LIB_SPEC "-lc"
|
||
|
||
/* Define the names of the division and modulus functions. */
|
||
#define DIVSI3_LIBCALL "OTS$DIV_I"
|
||
#define DIVDI3_LIBCALL "OTS$DIV_L"
|
||
#define UDIVSI3_LIBCALL "OTS$DIV_UI"
|
||
#define UDIVDI3_LIBCALL "OTS$DIV_UL"
|
||
#define MODSI3_LIBCALL "OTS$REM_I"
|
||
#define MODDI3_LIBCALL "OTS$REM_L"
|
||
#define UMODSI3_LIBCALL "OTS$REM_UI"
|
||
#define UMODDI3_LIBCALL "OTS$REM_UL"
|
||
|
||
#define NAME__MAIN "__gccmain"
|
||
#define SYMBOL__MAIN __gccmain
|
||
|
||
#define MD_EXEC_PREFIX "/gnu/lib/gcc-lib/"
|
||
#define MD_STARTFILE_PREFIX "/gnu/lib/gcc-lib/"
|
||
|
||
/* Specify the list of include file directories. */
|
||
#define INCLUDE_DEFAULTS \
|
||
{ \
|
||
{ "/gnu/lib/gcc-lib/include", 0, 0, 0 }, \
|
||
{ "/gnu_gxx_include", 0, 1, 1 }, \
|
||
{ "/gnu_cc_include", 0, 0, 0 }, \
|
||
{ "/gnu/include", 0, 0, 0 }, \
|
||
{ 0, 0, 0, 0 } \
|
||
}
|
||
|
||
#define LONGLONG_STANDALONE 1
|