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/* Definitions of target machine for GNU compiler, for DEC Alpha w/ELF.
Copyright (C) 1996-2014 Free Software Foundation, Inc.
Contributed by Richard Henderson (rth@tamu.edu).
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/>. */
#undef CC1_SPEC
#define CC1_SPEC "%{G*}"
#undef ASM_SPEC
#define ASM_SPEC "%{G*} %{relax:-relax} %{!gstabs*:-no-mdebug}%{gstabs*:-mdebug}"
/* Do not output a .file directive at the beginning of the input file. */
#undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
#define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
/* 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) \
if ((LOG) != 0) \
fprintf (FILE, "\t.align %d\n", LOG);
/* This says how to output assembler code to declare an
uninitialized internal linkage data object. Under SVR4,
the linker seems to want the alignment of data objects
to depend on their types. We do exactly that here. */
#undef ASM_OUTPUT_ALIGNED_LOCAL
#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
do { \
if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value) \
switch_to_section (sbss_section); \
else \
switch_to_section (bss_section); \
ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
if (!flag_inhibit_size_directive) \
ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \
ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \
ASM_OUTPUT_LABEL(FILE, NAME); \
ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \
} while (0)
/* This says how to output assembler code to declare an
uninitialized external linkage data object. */
#undef ASM_OUTPUT_ALIGNED_BSS
#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
do { \
ASM_OUTPUT_ALIGNED_LOCAL (FILE, NAME, SIZE, ALIGN); \
} while (0)
#undef BSS_SECTION_ASM_OP
#define BSS_SECTION_ASM_OP "\t.section\t.bss"
#undef SBSS_SECTION_ASM_OP
#define SBSS_SECTION_ASM_OP "\t.section\t.sbss,\"aw\""
#undef SDATA_SECTION_ASM_OP
#define SDATA_SECTION_ASM_OP "\t.section\t.sdata,\"aw\""
/* This is how we tell the assembler that two symbols have the same value. */
#undef ASM_OUTPUT_DEF
#define ASM_OUTPUT_DEF(FILE, ALIAS, NAME) \
do { \
assemble_name(FILE, ALIAS); \
fputs(" = ", FILE); \
assemble_name(FILE, NAME); \
fputc('\n', FILE); \
} while (0)
#undef ASM_OUTPUT_DEF_FROM_DECLS
#define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET) \
do { \
const char *alias = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
const char *name = IDENTIFIER_POINTER (TARGET); \
if (TREE_CODE (DECL) == FUNCTION_DECL) \
{ \
fputc ('$', FILE); \
assemble_name (FILE, alias); \
fputs ("..ng = $", FILE); \
assemble_name (FILE, name); \
fputs ("..ng\n", FILE); \
} \
ASM_OUTPUT_DEF (FILE, alias, name); \
} while (0)
/* Provide a STARTFILE_SPEC appropriate for ELF. Here we add the
(even more) magical crtbegin.o file which provides part of the
support for getting C++ file-scope static object constructed
before entering `main'. */
#undef STARTFILE_SPEC
#ifdef HAVE_LD_PIE
#define STARTFILE_SPEC \
"%{!shared: %{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
#else
#define STARTFILE_SPEC \
"%{!shared: %{pg|p:gcrt1.o%s;:crt1.o%s}}\
crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
#endif
/* Provide a ENDFILE_SPEC appropriate for ELF. Here we tack on the
magical crtend.o file which provides part of the support for
getting C++ file-scope static object constructed before entering
`main', followed by a normal ELF "finalizer" file, `crtn.o'. */
#undef ENDFILE_SPEC
#define ENDFILE_SPEC \
"%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
/* Select a format to encode pointers in exception handling data. CODE
is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is
true if the symbol may be affected by dynamic relocations.
Since application size is already constrained to <2GB by the form of
the ldgp relocation, we can use a 32-bit pc-relative relocation to
static data. Dynamic data is accessed indirectly to allow for read
only EH sections. */
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
(((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4)
/* If defined, a C statement to be executed just prior to the output of
assembler code for INSN. */
#define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \
(alpha_this_literal_sequence_number = 0, \
alpha_this_gpdisp_sequence_number = 0)
extern int alpha_this_literal_sequence_number;
extern int alpha_this_gpdisp_sequence_number;
/* Since the bits of the _init and _fini function is spread across
many object files, each potentially with its own GP, we must assume
we need to load our GP. Further, the .init/.fini section can
easily be more than 4MB away from the function to call so we can't
use bsr. */
#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
asm (SECTION_OP "\n" \
" br $29,1f\n" \
"1: ldgp $29,0($29)\n" \
" unop\n" \
" jsr $26," USER_LABEL_PREFIX #FUNC "\n" \
" .align 3\n" \
" .previous");
/* If we have the capability create headers for efficient EH lookup.
As of Jan 2002, only glibc 2.2.4 can actually make use of this, but
I imagine that other systems will catch up. In the meantime, it
doesn't harm to make sure that the data exists to be used later. */
#if defined(HAVE_LD_EH_FRAME_HDR)
#ifdef USE_EH_FRAME_HDR_FOR_STATIC
#define LINK_EH_SPEC "--eh-frame-hdr "
#else
#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
#endif
#endif
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