[thirdparty/gcc.git] / gcc / config / alpha / vms.h

/* Output variables, constants and external declarations, for GNU compiler.
   Copyright (C) 1996-2019 Free Software Foundation, Inc.

This file is part of GCC.

GCC 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 3, or (at your option)
any later version.

GCC 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 GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

/* Alpha/VMS object format is not really Elf, but this makes compiling
   crtstuff.c and dealing with shared library initialization much easier.  */
#define OBJECT_FORMAT_ELF

/* Do not use TM clone registry as it currently doesn't work.  Alpha/VMS
   object is too far from ELF for supporting TM out of the box.  */
#define USE_TM_CLONE_REGISTRY 0

/* This enables certain macros in alpha.h, which will make an indirect
   reference to an external symbol an invalid address.  This needs to be
   defined before we include alpha.h, since it determines which macros
   are used for GO_IF_*.  */

#define NO_EXTERNAL_INDIRECT_ADDRESS

#define SUBTARGET_OS_CPP_BUILTINS()		\
    do {					\
      builtin_define ("__ALPHA");		\
      if (TARGET_FLOAT_VAX)			\
        builtin_define ("__G_FLOAT");		\
      else					\
        builtin_define ("__IEEE_FLOAT");	\
    } while (0)

#undef PCC_STATIC_STRUCT_RETURN

#define MAX_OFILE_ALIGNMENT 524288  /* 8 x 2^16 by DEC Ada Test CD40VRA */

/* The maximum alignment 'malloc' honors.  */
#undef  MALLOC_ABI_ALIGNMENT
#define MALLOC_ABI_ALIGNMENT \
  ((flag_vms_malloc64 && flag_vms_pointer_size != VMS_POINTER_SIZE_NONE \
   ? 16 : 8) * BITS_PER_UNIT)

#undef FIXED_REGISTERS
#define FIXED_REGISTERS  \
 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }

#undef CALL_USED_REGISTERS
#define CALL_USED_REGISTERS  \
 {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
  1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }

/* List the order in which to allocate registers.  Each register must be
   listed once, even those in FIXED_REGISTERS.

   We allocate in the following order:
   $f1			(nonsaved floating-point register)
   $f10-$f15		(likewise)
   $f22-$f30		(likewise)
   $f21-$f16		(likewise, but input args)
   $f0			(nonsaved, but return value)
   $f2-$f9		(saved floating-point registers)
   $1			(nonsaved integer registers)
   $22-$25		(likewise)
   $28			(likewise)
   $0			(likewise, but return value)
   $21-$16		(likewise, but input args)
   $27			(procedure value in OSF, nonsaved in NT)
   $2-$8		(saved integer registers)
   $9-$14		(saved integer registers)
   $26			(return PC)
   $15			(frame pointer)
   $29			(global pointer)
   $30, $31, $f31	(stack pointer and always zero/ap & fp)  */

#undef REG_ALLOC_ORDER
#define REG_ALLOC_ORDER		\
  {33,					\
   42, 43, 44, 45, 46, 47,		\
   54, 55, 56, 57, 58, 59, 60, 61, 62,	\
   53, 52, 51, 50, 49, 48,		\
   32,					\
   34, 35, 36, 37, 38, 39, 40, 41,	\
   1,					\
   22, 23, 24, 25,			\
   28,					\
   0,					\
   21, 20, 19, 18, 17, 16,		\
   27,					\
   2, 3, 4, 5, 6, 7, 8,			\
   9, 10, 11, 12, 13, 14,		\
   26,					\
   15,					\
   29,					\
   30, 31, 63 }

#undef HARD_FRAME_POINTER_REGNUM
#define HARD_FRAME_POINTER_REGNUM 29

/* Define registers used by the epilogue and return instruction.  */
#undef EPILOGUE_USES
#define EPILOGUE_USES(REGNO)    ((REGNO) == 26 || (REGNO) == 29)

#undef INITIAL_ELIMINATION_OFFSET
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)			\
  ((OFFSET) = alpha_vms_initial_elimination_offset(FROM, TO))

\f
/* Define a data type for recording info about an argument list
   during the scan of that argument list.  This data type should
   hold all necessary information about the function itself
   and about the args processed so far, enough to enable macros
   such as FUNCTION_ARG to determine where the next arg should go.

   On Alpha/VMS, this is a structure that contains the number of
   arguments and, for each argument, the datatype of that argument.

   The number of arguments is a number of words of arguments scanned so far.
   Thus 6 or more means all following args should go on the stack.  */

enum avms_arg_type {I64, FF, FD, FG, FS, FT};
typedef struct {int num_args; enum avms_arg_type atypes[6];} avms_arg_info;

#undef CUMULATIVE_ARGS
#define CUMULATIVE_ARGS avms_arg_info

/* Initialize a variable CUM of type CUMULATIVE_ARGS
   for a call to a function whose data type is FNTYPE.
   For a library call, FNTYPE is 0.  */

#undef INIT_CUMULATIVE_ARGS
#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
  (CUM).num_args = 0;						\
  (CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64;	\
  (CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64;

#define DEFAULT_PCC_STRUCT_RETURN 0

/* Even though pointers are 64bits, only 32bit ever remain significant in code
   addresses.  */
#define MASK_RETURN_ADDR                                \
  (flag_vms_pointer_size == VMS_POINTER_SIZE_NONE       \
   ? constm1_rtx                                        \
   : GEN_INT (0xffffffff))

#undef  ASM_WEAKEN_LABEL
#define ASM_WEAKEN_LABEL(FILE, NAME)                            \
   do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME);  \
        fputc ('\n', FILE); } while (0)

#define READONLY_DATA_SECTION_ASM_OP "\t.rdata"
#define CTORS_SECTION_ASM_OP "\t.ctors"
#define DTORS_SECTION_ASM_OP "\t.dtors"
#define SDATA_SECTION_ASM_OP "\t.sdata"
#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)              \
   asm (SECTION_OP "\n\t.long " #FUNC"\n");

#undef ASM_OUTPUT_ADDR_DIFF_ELT

#undef ASM_OUTPUT_ADDR_VEC_ELT
#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
  fprintf (FILE, "\t.quad $L%d\n", (VALUE))

#undef CASE_VECTOR_MODE
#define CASE_VECTOR_MODE DImode
#undef CASE_VECTOR_PC_RELATIVE

#undef ASM_OUTPUT_CASE_LABEL
#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN)	\
{ ASM_OUTPUT_ALIGN (FILE, 3); (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); }

/* This says how to output assembler code to declare an                
   uninitialized external linkage data object.  */ 

#define COMMON_ASM_OP "\t.comm\t"

#undef ASM_OUTPUT_ALIGNED_DECL_COMMON
#define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
  vms_output_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN)
\f
/* Control how constructors and destructors are emitted.  */
#define TARGET_ASM_CONSTRUCTOR  vms_asm_out_constructor
#define TARGET_ASM_DESTRUCTOR   vms_asm_out_destructor

#define DWARF2_DEBUGGING_INFO 1
#define VMS_DEBUGGING_INFO 1

#define DWARF2_UNWIND_INFO 1

#undef EH_RETURN_HANDLER_RTX
#define EH_RETURN_HANDLER_RTX \
  gen_rtx_MEM (Pmode, plus_constant (Pmode, stack_pointer_rtx, 8))

#define LINK_EH_SPEC "vms-dwarf2eh.o%s "
#define LINK_GCC_C_SEQUENCE_SPEC "%G"

/* This is how to output an assembler line
   that says to advance the location counter
   to a multiple of 2**LOG bytes.  */

#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
    fprintf (FILE, "\t.align %d\n", LOG);

/* This is how to advance the location counter by SIZE bytes.  */

#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
  fprintf (FILE, "\t.space " HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))

/* This says how to output an assembler line
   to define a global common symbol.  */

#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED)	\
( fputs ("\t.lcomm ", (FILE)),				\
  assemble_name ((FILE), (NAME)),			\
  fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE)))

/* Switch into a generic section.  */
#define TARGET_ASM_NAMED_SECTION vms_asm_named_section

#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)      \
  do                                            \
    {                                           \
      fprintf ((FILE), "\t");                   \
      assemble_name (FILE, LABEL1);             \
      fprintf (FILE, " = ");                    \
      assemble_name (FILE, LABEL2);             \
      fprintf (FILE, "\n");                     \
    }                                           \
 while (0)

#undef PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG

#define ASM_PN_FORMAT "%s___%lu"

/* ??? 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.

   Because ASM_OUTPUT_ADDR_DIFF_ELT is not defined for alpha-vms,
   jump tables cannot be output for PIC code, because you can't put
   an absolute address in a readonly section.  Putting the table in
   a writable section is a security hole.  Therefore, we unset the
   flag_jump_tables flag, forcing switch statements to be expanded
   using decision trees.  There are probably other ways to address
   this issue, but using a decision tree is clearly safe.  */

#undef SUBTARGET_OVERRIDE_OPTIONS
#define SUBTARGET_OVERRIDE_OPTIONS                  \
do {                                                \
  if (write_symbols == NO_DEBUG                     \
      && debug_info_level == DINFO_LEVEL_NONE)      \
    {                                               \
      write_symbols = VMS_DEBUG;                    \
      debug_info_level = DINFO_LEVEL_TERSE;         \
    }                                               \
  if (flag_pic)                                     \
    flag_jump_tables = 0;                           \
} while (0)

#undef LINK_SPEC
#if HAVE_GNU_LD
/* GNU-ld built-in linker script already handles the dwarf2 debug sections.  */
#define LINK_SPEC "%{shared} %{v}"
#else
/* Link with vms-dwarf2.o if -g (except -g0). This causes the
   VMS link to pull all the dwarf2 debug sections together.  */
#define LINK_SPEC "%{g0} %{g*:-g vms-dwarf2.o%s} %{shared} %{v} %{map}"
#endif

#undef STARTFILE_SPEC
#define STARTFILE_SPEC "%{!shared:crt0.o%s crtbegin.o%s} \
 %{!static:%{shared:crtbeginS.o%s}}"

#define ENDFILE_SPEC "%{!shared:crtend.o%s} %{!static:%{shared:crtendS.o%s}}"

#define INIT_SECTION_ASM_OP "\t.section LIB$INITIALIZE,GBL,NOWRT"

#define LONGLONG_STANDALONE 1

#undef TARGET_VALID_POINTER_MODE
#define TARGET_VALID_POINTER_MODE vms_valid_pointer_mode

/* Default values for _CRTL_VER and _VMS_VER.  */
#define VMS_DEFAULT_CRTL_VER 70320000
#define VMS_DEFAULT_VMS_VER 70320000
Commit	Line	Data
16b61764	1	/* Output variables, constants and external declarations, for GNU compiler.
a5544970	2	Copyright (C) 1996-2019 Free Software Foundation, Inc.
16b61764	3
7ec022b2	4	This file is part of GCC.
16b61764	5
7ec022b2	6	GCC is free software; you can redistribute it and/or modify
16b61764	7	it under the terms of the GNU General Public License as published by
2f83c7d6	8	the Free Software Foundation; either version 3, or (at your option)
16b61764 DR	9	any later version.
16b61764 DR	10
7ec022b2	11	GCC is distributed in the hope that it will be useful,
16b61764 DR	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
2f83c7d6 NC	17	along with GCC; see the file COPYING3. If not see
2f83c7d6 NC	18	<http://www.gnu.org/licenses/>. */
16b61764	19
3bd1b109 DR	20	/* Alpha/VMS object format is not really Elf, but this makes compiling
	21	crtstuff.c and dealing with shared library initialization much easier. */
	22	#define OBJECT_FORMAT_ELF
	23
d3702b4f TG	24	/* Do not use TM clone registry as it currently doesn't work. Alpha/VMS
	25	object is too far from ELF for supporting TM out of the box. */
	26	#define USE_TM_CLONE_REGISTRY 0
	27
16b61764 DR	28	/* This enables certain macros in alpha.h, which will make an indirect
	29	reference to an external symbol an invalid address. This needs to be
	30	defined before we include alpha.h, since it determines which macros
	31	are used for GO_IF_. /
	32
	33	#define NO_EXTERNAL_INDIRECT_ADDRESS
	34
ba89fcb6	35	#define SUBTARGET_OS_CPP_BUILTINS() \
12a41c22	36	do { \
ba89fcb6 TG	37	builtin_define ("__ALPHA"); \
	38	if (TARGET_FLOAT_VAX) \
	39	builtin_define ("__G_FLOAT"); \
	40	else \
	41	builtin_define ("__IEEE_FLOAT"); \
12a41c22	42	} while (0)
16b61764	43
16b61764 DR	44	#undef PCC_STATIC_STRUCT_RETURN
16b61764 DR	45
16b61764 DR	46	#define MAX_OFILE_ALIGNMENT 524288 /* 8 x 2^16 by DEC Ada Test CD40VRA */
16b61764 DR	47
5e3fef6c	48	/* The maximum alignment 'malloc' honors. */
ff1bb6ee	49	#undef MALLOC_ABI_ALIGNMENT
d8aba32a TG	50	#define MALLOC_ABI_ALIGNMENT \
	51	((flag_vms_malloc64 && flag_vms_pointer_size != VMS_POINTER_SIZE_NONE \
	52	? 16 : 8) * BITS_PER_UNIT)
5e3fef6c	53
16b61764 DR	54	#undef FIXED_REGISTERS
	55	#define FIXED_REGISTERS \
	56	{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
	57	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
	58	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
	59	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }
	60
	61	#undef CALL_USED_REGISTERS
	62	#define CALL_USED_REGISTERS \
	63	{1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
	64	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
	65	1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, \
	66	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }
	67
	68	/* List the order in which to allocate registers. Each register must be
	69	listed once, even those in FIXED_REGISTERS.
	70
	71	We allocate in the following order:
	72	$f1 (nonsaved floating-point register)
	73	$f10-$f15 (likewise)
	74	$f22-$f30 (likewise)
	75	$f21-$f16 (likewise, but input args)
	76	$f0 (nonsaved, but return value)
	77	$f2-$f9 (saved floating-point registers)
	78	$1 (nonsaved integer registers)
	79	$22-$25 (likewise)
	80	$28 (likewise)
	81	$0 (likewise, but return value)
	82	$21-$16 (likewise, but input args)
	83	$27 (procedure value in OSF, nonsaved in NT)
	84	$2-$8 (saved integer registers)
	85	$9-$14 (saved integer registers)
	86	$26 (return PC)
	87	$15 (frame pointer)
	88	$29 (global pointer)
	89	$30, $31, $f31 (stack pointer and always zero/ap & fp) */
	90
	91	#undef REG_ALLOC_ORDER
	92	#define REG_ALLOC_ORDER \
	93	{33, \
	94	42, 43, 44, 45, 46, 47, \
	95	54, 55, 56, 57, 58, 59, 60, 61, 62, \
	96	53, 52, 51, 50, 49, 48, \
	97	32, \
	98	34, 35, 36, 37, 38, 39, 40, 41, \
	99	1, \
	100	22, 23, 24, 25, \
	101	28, \
	102	0, \
	103	21, 20, 19, 18, 17, 16, \
	104	27, \
	105	2, 3, 4, 5, 6, 7, 8, \
	106	9, 10, 11, 12, 13, 14, \
	107	26, \
	108	15, \
	109	29, \
	110	30, 31, 63 }
	111
	112	#undef HARD_FRAME_POINTER_REGNUM
	113	#define HARD_FRAME_POINTER_REGNUM 29
	114
	115	/* Define registers used by the epilogue and return instruction. */
	116	#undef EPILOGUE_USES
	117	#define EPILOGUE_USES(REGNO) ((REGNO) == 26 \|\| (REGNO) == 29)
118
16b61764 DR	119	#undef INITIAL_ELIMINATION_OFFSET
16b61764 DR	120	#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1d3499d8 OH	121	((OFFSET) = alpha_vms_initial_elimination_offset(FROM, TO))
1d3499d8 OH	122
16b61764 DR	123	\f
	124	/* Define a data type for recording info about an argument list
	125	during the scan of that argument list. This data type should
	126	hold all necessary information about the function itself
	127	and about the args processed so far, enough to enable macros
	128	such as FUNCTION_ARG to determine where the next arg should go.
	129
	130	On Alpha/VMS, this is a structure that contains the number of
	131	arguments and, for each argument, the datatype of that argument.
	132
	133	The number of arguments is a number of words of arguments scanned so far.
	134	Thus 6 or more means all following args should go on the stack. */
	135
	136	enum avms_arg_type {I64, FF, FD, FG, FS, FT};
	137	typedef struct {int num_args; enum avms_arg_type atypes[6];} avms_arg_info;
	138
	139	#undef CUMULATIVE_ARGS
	140	#define CUMULATIVE_ARGS avms_arg_info
	141
	142	/* Initialize a variable CUM of type CUMULATIVE_ARGS
	143	for a call to a function whose data type is FNTYPE.
	144	For a library call, FNTYPE is 0. */
	145
	146	#undef INIT_CUMULATIVE_ARGS
0f6937fe	147	#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
16b61764 DR	148	(CUM).num_args = 0; \
	149	(CUM).atypes[0] = (CUM).atypes[1] = (CUM).atypes[2] = I64; \
	150	(CUM).atypes[3] = (CUM).atypes[4] = (CUM).atypes[5] = I64;
	151
050d3f9d	152	#define DEFAULT_PCC_STRUCT_RETURN 0
16b61764	153
073a8998	154	/* Even though pointers are 64bits, only 32bit ever remain significant in code
ba89fcb6	155	addresses. */
d8aba32a TG	156	#define MASK_RETURN_ADDR \
	157	(flag_vms_pointer_size == VMS_POINTER_SIZE_NONE \
	158	? constm1_rtx \
	159	: GEN_INT (0xffffffff))
ba89fcb6	160
3bd1b109 DR	161	#undef ASM_WEAKEN_LABEL
	162	#define ASM_WEAKEN_LABEL(FILE, NAME) \
	163	do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
	164	fputc ('\n', FILE); } while (0)
	165
d48bc59a	166	#define READONLY_DATA_SECTION_ASM_OP "\t.rdata"
16b61764 DR	167	#define CTORS_SECTION_ASM_OP "\t.ctors"
16b61764 DR	168	#define DTORS_SECTION_ASM_OP "\t.dtors"
3bd1b109 DR	169	#define SDATA_SECTION_ASM_OP "\t.sdata"
	170	#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
	171	asm (SECTION_OP "\n\t.long " #FUNC"\n");
16b61764	172
16b61764	173	#undef ASM_OUTPUT_ADDR_DIFF_ELT
16b61764 DR	174
	175	#undef ASM_OUTPUT_ADDR_VEC_ELT
	176	#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
	177	fprintf (FILE, "\t.quad $L%d\n", (VALUE))
	178
16b61764 DR	179	#undef CASE_VECTOR_MODE
	180	#define CASE_VECTOR_MODE DImode
	181	#undef CASE_VECTOR_PC_RELATIVE
	182
	183	#undef ASM_OUTPUT_CASE_LABEL
	184	#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \
4977bab6	185	{ ASM_OUTPUT_ALIGN (FILE, 3); (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); }
16b61764 DR	186
	187	/* This says how to output assembler code to declare an
	188	uninitialized external linkage data object. */
	189
	190	#define COMMON_ASM_OP "\t.comm\t"
	191
18fd5621 EB	192	#undef ASM_OUTPUT_ALIGNED_DECL_COMMON
	193	#define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
	194	vms_output_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN)
16b61764	195	\f
16b61764 DR	196	/* Control how constructors and destructors are emitted. */
	197	#define TARGET_ASM_CONSTRUCTOR vms_asm_out_constructor
	198	#define TARGET_ASM_DESTRUCTOR vms_asm_out_destructor
	199
23532de9 JT	200	#define DWARF2_DEBUGGING_INFO 1
23532de9 JT	201	#define VMS_DEBUGGING_INFO 1
16b61764 DR	202
	203	#define DWARF2_UNWIND_INFO 1
	204
	205	#undef EH_RETURN_HANDLER_RTX
	206	#define EH_RETURN_HANDLER_RTX \
0a81f074	207	gen_rtx_MEM (Pmode, plus_constant (Pmode, stack_pointer_rtx, 8))
16b61764	208
12300dad	209	#define LINK_EH_SPEC "vms-dwarf2eh.o%s "
c889a16f	210	#define LINK_GCC_C_SEQUENCE_SPEC "%G"
16b61764	211
e9a25f70 JL	212	/* This is how to output an assembler line
	213	that says to advance the location counter
	214	to a multiple of 2*LOG bytes. /
	215
e9a25f70 JL	216	#define ASM_OUTPUT_ALIGN(FILE,LOG) \
	217	fprintf (FILE, "\t.align %d\n", LOG);
	218
b31a2c5a UB	219	/* This is how to advance the location counter by SIZE bytes. */
	220
	221	#define ASM_OUTPUT_SKIP(FILE,SIZE) \
16998094	222	fprintf (FILE, "\t.space " HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))
b31a2c5a UB	223
	224	/* This says how to output an assembler line
	225	to define a global common symbol. */
	226
	227	#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE,ROUNDED) \
	228	( fputs ("\t.lcomm ", (FILE)), \
	229	assemble_name ((FILE), (NAME)), \
16998094	230	fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE)))
b31a2c5a	231
7c262518 RH	232	/* Switch into a generic section. */
7c262518 RH	233	#define TARGET_ASM_NAMED_SECTION vms_asm_named_section
e9a25f70	234
872b942a TG	235	#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
	236	do \
	237	{ \
	238	fprintf ((FILE), "\t"); \
	239	assemble_name (FILE, LABEL1); \
	240	fprintf (FILE, " = "); \
	241	assemble_name (FILE, LABEL2); \
	242	fprintf (FILE, "\n"); \
	243	} \
	244	while (0)
e9a25f70	245
aacdb8bb	246	#undef PREFERRED_DEBUGGING_TYPE
7a0c8d71	247	#define PREFERRED_DEBUGGING_TYPE VMS_AND_DWARF2_DEBUG
aacdb8bb	248
4977bab6	249	#define ASM_PN_FORMAT "%s___%lu"
aacdb8bb	250
60593797	251	/* ??? VMS uses different linkage. */
eb0424da	252	#undef TARGET_ASM_OUTPUT_MI_THUNK
60593797	253
aacdb8bb	254	#undef ASM_SPEC
aacdb8bb	255	#undef ASM_FINAL_SPEC
7a0c8d71 DR	256
7a0c8d71 DR	257	/* The VMS convention is to always provide minimal debug info
daccad6d SB	258	for a traceback unless specifically overridden.
	259
	260	Because ASM_OUTPUT_ADDR_DIFF_ELT is not defined for alpha-vms,
	261	jump tables cannot be output for PIC code, because you can't put
	262	an absolute address in a readonly section. Putting the table in
	263	a writable section is a security hole. Therefore, we unset the
	264	flag_jump_tables flag, forcing switch statements to be expanded
	265	using decision trees. There are probably other ways to address
	266	this issue, but using a decision tree is clearly safe. */
7a0c8d71	267
c5387660 JM	268	#undef SUBTARGET_OVERRIDE_OPTIONS
	269	#define SUBTARGET_OVERRIDE_OPTIONS \
	270	do { \
fddeba6d DR	271	if (write_symbols == NO_DEBUG \
	272	&& debug_info_level == DINFO_LEVEL_NONE) \
	273	{ \
	274	write_symbols = VMS_DEBUG; \
	275	debug_info_level = DINFO_LEVEL_TERSE; \
	276	} \
daccad6d SB	277	if (flag_pic) \
daccad6d SB	278	flag_jump_tables = 0; \
c5387660	279	} while (0)
7a0c8d71	280
b501ce4e TG	281	#undef LINK_SPEC
	282	#if HAVE_GNU_LD
	283	/* GNU-ld built-in linker script already handles the dwarf2 debug sections. */
	284	#define LINK_SPEC "%{shared} %{v}"
	285	#else
7a0c8d71	286	/* Link with vms-dwarf2.o if -g (except -g0). This causes the
d6b4baa4	287	VMS link to pull all the dwarf2 debug sections together. */
4b12e93d	288	#define LINK_SPEC "%{g0} %{g*:-g vms-dwarf2.o%s} %{shared} %{v} %{map}"
b501ce4e	289	#endif
7a0c8d71	290
aacdb8bb	291	#undef STARTFILE_SPEC
4b12e93d	292	#define STARTFILE_SPEC "%{!shared:crt0.o%s crtbegin.o%s} \
3bd1b109 DR	293	%{!static:%{shared:crtbeginS.o%s}}"
3bd1b109 DR	294
4b12e93d	295	#define ENDFILE_SPEC "%{!shared:crtend.o%s} %{!static:%{shared:crtendS.o%s}}"
5dd8a9b1	296
3bd1b109 DR	297	#define INIT_SECTION_ASM_OP "\t.section LIB$INITIALIZE,GBL,NOWRT"
3bd1b109 DR	298
41823c5e	299	#define LONGLONG_STANDALONE 1
dfe6ba6d DR	300
	301	#undef TARGET_VALID_POINTER_MODE
	302	#define TARGET_VALID_POINTER_MODE vms_valid_pointer_mode
6ceb677f TG	303
	304	/* Default values for _CRTL_VER and _VMS_VER. */
	305	#define VMS_DEFAULT_CRTL_VER 70320000
	306	#define VMS_DEFAULT_VMS_VER 70320000