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Diffstat (limited to 'contrib/gcc/config/i386/svr3gas.h')
| -rw-r--r-- | contrib/gcc/config/i386/svr3gas.h | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/contrib/gcc/config/i386/svr3gas.h b/contrib/gcc/config/i386/svr3gas.h new file mode 100644 index 0000000..401c766 --- /dev/null +++ b/contrib/gcc/config/i386/svr3gas.h @@ -0,0 +1,305 @@ +/* Definitions for Intel 386 running system V, using gas. + Copyright (C) 1992 Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC 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 2, or (at your option) +any later version. + +GNU CC 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 GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include "i386/gas.h" + +/* Add stuff that normally comes from i386/sysv3.h */ + +/* longjmp may fail to restore the registers if called from the same + function that called setjmp. To compensate, the compiler avoids + putting variables in registers in functions that use both setjmp + and longjmp. */ + +#define NON_SAVING_SETJMP \ + (current_function_calls_setjmp && current_function_calls_longjmp) + +/* longjmp may fail to restore the stack pointer if the saved frame + pointer is the same as the caller's frame pointer. Requiring a frame + pointer in any function that calls setjmp or longjmp avoids this + problem, unless setjmp and longjmp are called from the same function. + Since a frame pointer will be required in such a function, it is OK + that the stack pointer is not restored. */ + +#undef FRAME_POINTER_REQUIRED +#define FRAME_POINTER_REQUIRED \ + (current_function_calls_setjmp || current_function_calls_longjmp) + +/* Modify ASM_OUTPUT_LOCAL slightly to test -msvr3-shlib, adapted to gas */ +#undef ASM_OUTPUT_LOCAL +#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ + do { \ + int align = exact_log2 (ROUNDED); \ + if (align > 2) align = 2; \ + if (TARGET_SVR3_SHLIB) \ + { \ + data_section (); \ + ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \ + ASM_OUTPUT_LABEL ((FILE), (NAME)); \ + fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)); \ + } \ + else \ + { \ + fputs (".lcomm ", (FILE)); \ + assemble_name ((FILE), (NAME)); \ + fprintf ((FILE), ",%u\n", (ROUNDED)); \ + } \ + } while (0) + +/* Add stuff that normally comes from i386/sysv3.h via svr3.h */ + +/* Define the actual types of some ANSI-mandated types. These + definitions should work for most SVR3 systems. */ + +#undef SIZE_TYPE +#define SIZE_TYPE "unsigned int" + +#undef PTRDIFF_TYPE +#define PTRDIFF_TYPE "int" + +#undef WCHAR_TYPE +#define WCHAR_TYPE "long int" + +#undef WCHAR_TYPE_SIZE +#define WCHAR_TYPE_SIZE BITS_PER_WORD + +/* ??? This stuff is copied from config/svr3.h. In the future, + this file should be rewritten to include config/svr3.h + and override what isn't right. */ + +/* Support const sections and the ctors and dtors sections for g++. + Note that there appears to be two different ways to support const + sections at the moment. You can either #define the symbol + READONLY_DATA_SECTION (giving it some code which switches to the + readonly data section) or else you can #define the symbols + EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and + SELECT_RTX_SECTION. We do both here just to be on the safe side. + However, use of the const section is turned off by default + unless the specific tm.h file turns it on by defining + USE_CONST_SECTION as 1. */ + +/* Define a few machine-specific details of the implementation of + constructors. + + The __CTORS_LIST__ goes in the .init section. Define CTOR_LIST_BEGIN + and CTOR_LIST_END to contribute to the .init section an instruction to + push a word containing 0 (or some equivalent of that). + + Define ASM_OUTPUT_CONSTRUCTOR to push the address of the constructor. */ + +#define USE_CONST_SECTION 0 + +#define INIT_SECTION_ASM_OP ".section\t.init" +#define FINI_SECTION_ASM_OP ".section .fini,\"x\"" +#define CONST_SECTION_ASM_OP ".section\t.rodata, \"x\"" +#define CTORS_SECTION_ASM_OP INIT_SECTION_ASM_OP +#define DTORS_SECTION_ASM_OP FINI_SECTION_ASM_OP + +/* CTOR_LIST_BEGIN and CTOR_LIST_END are machine-dependent + because they push on the stack. */ + +#ifdef STACK_GROWS_DOWNWARD + +/* Constructor list on stack is in reverse order. Go to the end of the + list and go backwards to call constructors in the right order. */ +#define DO_GLOBAL_CTORS_BODY \ +do { \ + func_ptr *p, *beg = alloca (0); \ + for (p = beg; *p; p++) \ + ; \ + while (p != beg) \ + (*--p) (); \ +} while (0) + +#else + +/* Constructor list on stack is in correct order. Just call them. */ +#define DO_GLOBAL_CTORS_BODY \ +do { \ + func_ptr *p, *beg = alloca (0); \ + for (p = beg; *p; ) \ + (*p++) (); \ +} while (0) + +#endif /* STACK_GROWS_DOWNWARD */ + +/* Add extra sections .init and .fini, in addition to .bss from att386.h. */ + +#undef EXTRA_SECTIONS +#define EXTRA_SECTIONS in_const, in_bss, in_init, in_fini + +#undef EXTRA_SECTION_FUNCTIONS +#define EXTRA_SECTION_FUNCTIONS \ + CONST_SECTION_FUNCTION \ + BSS_SECTION_FUNCTION \ + INIT_SECTION_FUNCTION \ + FINI_SECTION_FUNCTION + +#define BSS_SECTION_FUNCTION \ +void \ +bss_section () \ +{ \ + if (in_section != in_bss) \ + { \ + fprintf (asm_out_file, "\t%s\n", BSS_SECTION_ASM_OP); \ + in_section = in_bss; \ + } \ +} + +#define INIT_SECTION_FUNCTION \ +void \ +init_section () \ +{ \ + if (in_section != in_init) \ + { \ + fprintf (asm_out_file, "\t%s\n", INIT_SECTION_ASM_OP); \ + in_section = in_init; \ + } \ +} + +#define FINI_SECTION_FUNCTION \ +void \ +fini_section () \ +{ \ + if (in_section != in_fini) \ + { \ + fprintf (asm_out_file, "\t%s\n", FINI_SECTION_ASM_OP); \ + in_section = in_fini; \ + } \ +} + +#define READONLY_DATA_SECTION() const_section () + +#define CONST_SECTION_FUNCTION \ +void \ +const_section () \ +{ \ + extern void text_section(); \ + if (!USE_CONST_SECTION) \ + text_section(); \ + else if (in_section != in_const) \ + { \ + fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \ + in_section = in_const; \ + } \ +} + +/* The ctors and dtors sections are not normally put into use + by EXTRA_SECTIONS and EXTRA_SECTION_FUNCTIONS as defined in svr3.h, + but it can't hurt to define these macros for whatever systems use them. */ +#define CTORS_SECTION_FUNCTION \ +void \ +ctors_section () \ +{ \ + if (in_section != in_ctors) \ + { \ + 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; \ + } \ +} + +/* This is machine-dependent + because it needs to push something on the stack. */ +#undef ASM_OUTPUT_CONSTRUCTOR + +/* A C statement (sans semicolon) to output an element in the table of + global destructors. */ +#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \ + do { \ + fini_section (); \ + fprintf (FILE, "%s\t ", ASM_LONG); \ + assemble_name (FILE, NAME); \ + fprintf (FILE, "\n"); \ + } while (0) + +/* A C statement or statements to switch to the appropriate + section for output of DECL. DECL is either a `VAR_DECL' node + or a constant of some sort. RELOC indicates whether forming + the initial value of DECL requires link-time relocations. */ + +#define SELECT_SECTION(DECL,RELOC) \ +{ \ + if (TREE_CODE (DECL) == STRING_CST) \ + { \ + if (! flag_writable_strings) \ + const_section (); \ + else \ + data_section (); \ + } \ + else if (TREE_CODE (DECL) == VAR_DECL) \ + { \ + if ((0 && RELOC) /* should be (flag_pic && RELOC) */ \ + || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL) \ + || !DECL_INITIAL (DECL) \ + || (DECL_INITIAL (DECL) != error_mark_node \ + && !TREE_CONSTANT (DECL_INITIAL (DECL)))) \ + data_section (); \ + else \ + const_section (); \ + } \ + else \ + const_section (); \ +} + +/* A C statement or statements to switch to the appropriate + section for output of RTX in mode MODE. RTX is some kind + of constant in RTL. The argument MODE is redundant except + in the case of a `const_int' rtx. Currently, these always + go into the const section. */ + +#define SELECT_RTX_SECTION(MODE,RTX) const_section() + +/* This is copied from i386/sysv3.h. */ + +/* Define a few machine-specific details of the implementation of + constructors. + + The __CTORS_LIST__ goes in the .init section. Define CTOR_LIST_BEGIN + and CTOR_LIST_END to contribute to the .init section an instruction to + push a word containing 0 (or some equivalent of that). + + ASM_OUTPUT_CONSTRUCTOR should be defined to push the address of the + constructor. */ + +#undef INIT_SECTION_ASM_OP +#define INIT_SECTION_ASM_OP ".section .init,\"x\"" + +#define CTOR_LIST_BEGIN \ + asm (INIT_SECTION_ASM_OP); \ + asm ("pushl $0") +#define CTOR_LIST_END CTOR_LIST_BEGIN + +#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \ + do { \ + init_section (); \ + fprintf (FILE, "\tpushl $"); \ + assemble_name (FILE, NAME); \ + fprintf (FILE, "\n"); \ + } while (0) |
