diff options
Diffstat (limited to 'contrib/gcc/config/alpha/elf.h')
| -rw-r--r-- | contrib/gcc/config/alpha/elf.h | 190 |
1 files changed, 93 insertions, 97 deletions
diff --git a/contrib/gcc/config/alpha/elf.h b/contrib/gcc/config/alpha/elf.h index 82f0410..4f4703c 100644 --- a/contrib/gcc/config/alpha/elf.h +++ b/contrib/gcc/config/alpha/elf.h @@ -1,5 +1,5 @@ /* Definitions of target machine for GNU compiler, for DEC Alpha w/ELF. - Copyright (C) 1996 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. Contributed by Richard Henderson (rth@tamu.edu). This file is part of GNU CC. @@ -19,53 +19,49 @@ 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. */ -/* This is used on Alpha platforms that use the ELF format. -Currently only Linux uses this. */ - -#if 0 -#include "alpha/linux.h" -#endif - -#undef TARGET_VERSION -#define TARGET_VERSION fprintf (stderr, " (Alpha Linux/ELF)"); - #undef OBJECT_FORMAT_COFF #undef EXTENDED_COFF #define OBJECT_FORMAT_ELF -#define SDB_DEBUGGING_INFO +#define DBX_DEBUGGING_INFO + +#undef PREFERRED_DEBUGGING_TYPE +#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG #undef ASM_FINAL_SPEC -#undef CPP_PREDEFINES -#define CPP_PREDEFINES "\ --D__alpha -D__alpha__ -D__linux__ -D__linux -D_LONGLONG -Dlinux -Dunix \ --Asystem(linux) -Acpu(alpha) -Amachine(alpha) -D__ELF__" +#undef CC1_SPEC +#define CC1_SPEC "%{G*}" + +#undef ASM_SPEC +#define ASM_SPEC "%{G*} %{relax:-relax}" #undef LINK_SPEC -#define LINK_SPEC "-m elf64alpha -G 8 %{O*:-O3} %{!O*:-O1} \ +#define LINK_SPEC "-m elf64alpha %{G*} %{relax:-relax} \ + %{O*:-O3} %{!O*:-O1} \ %{shared:-shared} \ %{!shared: \ %{!static: \ %{rdynamic:-export-dynamic} \ - %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}} \ + %{!dynamic-linker:-dynamic-linker %(elf_dynamic_linker)}} \ %{static:-static}}" /* Output at beginning of assembler file. */ - #undef ASM_FILE_START #define ASM_FILE_START(FILE) \ { \ alpha_write_verstamp (FILE); \ output_file_directive (FILE, main_input_filename); \ - fprintf (FILE, "\t.version\t\"01.01\"\n"); \ fprintf (FILE, "\t.set noat\n"); \ + fprintf (FILE, "\t.set noreorder\n"); \ + if (TARGET_BWX | TARGET_MAX | TARGET_CIX) \ + { \ + fprintf (FILE, "\t.arch %s\n", \ + (alpha_cpu == PROCESSOR_EV6 ? "ev6" \ + : TARGET_MAX ? "pca56" : "ev56")); \ + } \ } -#define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) \ - alpha_output_lineno (STREAM, LINE) -extern void alpha_output_lineno (); - extern void output_file_directive (); /* Attach a special .ident directive to the end of the file to identify @@ -77,8 +73,8 @@ extern void output_file_directive (); #ifdef IDENTIFY_WITH_IDENT #define ASM_IDENTIFY_GCC(FILE) /* nothing */ -#define ASM_IDENTIFY_LANGUAGE(FILE) \ - fprintf(FILE, "\t%s \"GCC (%s) %s\"\n", IDENT_ASM_OP, \ +#define ASM_IDENTIFY_LANGUAGE(FILE) \ + fprintf(FILE, "\t%s \"GCC (%s) %s\"\n", IDENT_ASM_OP, \ lang_identify(), version_string) #else #define ASM_FILE_END(FILE) \ @@ -89,11 +85,9 @@ do { \ #endif /* Allow #sccs in preprocessor. */ - #define SCCS_DIRECTIVE /* Output #ident as a .ident. */ - #define ASM_OUTPUT_IDENT(FILE, NAME) \ fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME); @@ -155,22 +149,46 @@ do { \ the linker seems to want the alignment of data objects to depend on their types. We do exactly that here. */ -#define LOCAL_ASM_OP ".local" - #undef ASM_OUTPUT_ALIGNED_LOCAL #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ do { \ - fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \ - assemble_name ((FILE), (NAME)); \ - fprintf ((FILE), "\n"); \ - ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \ + if ((SIZE) <= g_switch_value) \ + sbss_section(); \ + else \ + bss_section(); \ + fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \ + assemble_name (FILE, NAME); \ + putc (',', FILE); \ + fprintf (FILE, TYPE_OPERAND_FMT, "object"); \ + putc ('\n', FILE); \ + if (!flag_inhibit_size_directive) \ + { \ + fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ + assemble_name (FILE, NAME); \ + fprintf (FILE, ",%d\n", (SIZE)); \ + } \ + ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \ + ASM_OUTPUT_LABEL(FILE, NAME); \ + ASM_OUTPUT_SKIP((FILE), (SIZE)); \ } while (0) /* This is the pseudo-op used to generate a 64-bit word of data with a - specific value in some section. */ + specific value in some section. */ #define INT_ASM_OP ".quad" +/* Biggest alignment supported by the object file format of this + machine. Use this macro to limit the alignment which can be + specified using the `__attribute__ ((aligned (N)))' construct. If + not defined, the default value is `BIGGEST_ALIGNMENT'. + + This value is really 2^63. Since gcc figures the alignment in bits, + we could only potentially get to 2^60 on suitible hosts. Due to other + considerations in varasm, we must restrict this to what fits in an int. */ + +#define MAX_OFILE_ALIGNMENT \ + (1 << (HOST_BITS_PER_INT < 64 ? HOST_BITS_PER_INT - 2 : 62)) + /* This is the pseudo-op used to generate a contiguous sequence of byte values from a double-quoted string WITHOUT HAVING A TERMINATING NUL AUTOMATICALLY APPENDED. This is the same for most svr4 assemblers. */ @@ -208,6 +226,11 @@ do { \ #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\"" #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\"" +/* Handle the small data sections. */ +#define BSS_SECTION_ASM_OP ".section\t.bss" +#define SBSS_SECTION_ASM_OP ".section\t.sbss,\"aw\"" +#define SDATA_SECTION_ASM_OP ".section\t.sdata,\"aw\"" + /* On svr4, we *do* have support for the .init and .fini sections, and we can put stuff in there to be executed before and after `main'. We let crtstuff.c and other files know this by defining the following symbols. @@ -217,17 +240,13 @@ do { \ #define INIT_SECTION_ASM_OP ".section\t.init" #define FINI_SECTION_ASM_OP ".section\t.fini" -/* Support non-common, uninitialized data in the .bss section. */ - -#define BSS_SECTION_ASM_OP ".section\t.bss" - /* A default list of other sections which we might be "in" at any given time. For targets that use additional sections (e.g. .tdesc) you should override this definition in the target-specific file which includes this file. */ #undef EXTRA_SECTIONS -#define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_bss +#define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_sbss, in_sdata /* A default list of extra section function definitions. For targets that use additional sections (e.g. .tdesc) you should override this @@ -236,9 +255,10 @@ do { \ #undef EXTRA_SECTION_FUNCTIONS #define EXTRA_SECTION_FUNCTIONS \ CONST_SECTION_FUNCTION \ - CTORS_SECTION_FUNCTION \ - DTORS_SECTION_FUNCTION \ - BSS_SECTION_FUNCTION + SECTION_FUNCTION_TEMPLATE(ctors_section, in_ctors, CTORS_SECTION_ASM_OP) \ + SECTION_FUNCTION_TEMPLATE(dtors_section, in_dtors, DTORS_SECTION_ASM_OP) \ + SECTION_FUNCTION_TEMPLATE(sbss_section, in_sbss, SBSS_SECTION_ASM_OP) \ + SECTION_FUNCTION_TEMPLATE(sdata_section, in_sdata, SDATA_SECTION_ASM_OP) #undef READONLY_DATA_SECTION #define READONLY_DATA_SECTION() const_section () @@ -258,36 +278,13 @@ const_section () \ } \ } -#define CTORS_SECTION_FUNCTION \ -void \ -ctors_section () \ +#define SECTION_FUNCTION_TEMPLATE(FN, ENUM, OP) \ +void FN () \ { \ - if (in_section != in_ctors) \ + if (in_section != ENUM) \ { \ - fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \ - in_section = in_ctors; \ - } \ -} - -#define DTORS_SECTION_FUNCTION \ -void \ -dtors_section () \ -{ \ - if (in_section != in_dtors) \ - { \ - fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \ - in_section = in_dtors; \ - } \ -} - -#define BSS_SECTION_FUNCTION \ -void \ -bss_section () \ -{ \ - if (in_section != in_bss) \ - { \ - fprintf (asm_out_file, "%s\n", BSS_SECTION_ASM_OP); \ - in_section = in_bss; \ + fprintf (asm_out_file, "%s\n", OP); \ + in_section = ENUM; \ } \ } @@ -297,10 +294,10 @@ bss_section () \ We make the section read-only and executable for a function decl, read-only for a const data decl, and writable for a non-const data decl. */ -#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME) \ +#define ASM_OUTPUT_SECTION_NAME(FILE, DECL, NAME, RELOC) \ fprintf (FILE, ".section\t%s,\"%s\",@progbits\n", NAME, \ (DECL) && TREE_CODE (DECL) == FUNCTION_DECL ? "ax" : \ - (DECL) && TREE_READONLY (DECL) ? "a" : "aw") + (DECL) && DECL_READONLY_SECTION (DECL, RELOC) ? "a" : "aw") /* A C statement (sans semicolon) to output an element in the table of @@ -344,11 +341,10 @@ bss_section () \ || !DECL_INITIAL (DECL) \ || (DECL_INITIAL (DECL) != error_mark_node \ && !TREE_CONSTANT (DECL_INITIAL (DECL)))) \ - { \ - if (DECL_COMMON (DECL) \ - && !DECL_INITIAL (DECL)) \ - /* || DECL_INITIAL (DECL) == error_mark_node)) */ \ - bss_section(); \ + { \ + int size = int_size_in_bytes (TREE_TYPE (DECL)); \ + if (size >= 0 && size <= g_switch_value) \ + sdata_section (); \ else \ data_section (); \ } \ @@ -486,39 +482,39 @@ do { \ escape sequence like \377 would count as four bytes. If your target assembler doesn't support the .string directive, you - should define this to zero. -*/ + should define this to zero. */ #define STRING_LIMIT ((unsigned) 256) - #define STRING_ASM_OP ".string" -/* - * We always use gas here, so we don't worry about ECOFF assembler problems. - */ +/* GAS is the only Alpha/ELF assembler. */ #undef TARGET_GAS #define TARGET_GAS (1) -#undef PREFERRED_DEBUGGING_TYPE -#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG +/* 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'. -/* Provide a STARTFILE_SPEC appropriate for Linux. Here we add - the Linux magical crtbegin.o file (see crtstuff.c) which - provides part of the support for getting C++ file-scope static - object constructed before entering `main'. */ + Don't bother seeing crtstuff.c -- there is absolutely no hope of + getting that file to understand multiple GPs. GNU Libc provides a + hand-coded version that is used on Linux; it could be copied here + if there is ever a need. */ #undef STARTFILE_SPEC #define STARTFILE_SPEC \ "%{!shared: \ %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\ - crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}" + crti.o%s crtbegin.o%s" -/* Provide a ENDFILE_SPEC appropriate for Linux. Here we tack on - the Linux magical crtend.o file (see crtstuff.c) which - provides part of the support for getting C++ file-scope static - object constructed before entering `main', followed by a normal - Linux "finalizer" file, `crtn.o'. */ +/* 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 \ - "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s" + "crtend.o%s crtn.o%s" + +/* We support #pragma. */ +#define HANDLE_SYSV_PRAGMA |
