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Diffstat (limited to 'gcc-4.9/gcc/config/alpha/elf.h')
| -rw-r--r-- | gcc-4.9/gcc/config/alpha/elf.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/config/alpha/elf.h b/gcc-4.9/gcc/config/alpha/elf.h new file mode 100644 index 000000000..5a6803aba --- /dev/null +++ b/gcc-4.9/gcc/config/alpha/elf.h @@ -0,0 +1,168 @@ +/* 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) +#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} " +#endif |