--- gcc/config/svr4.h 2018/04/24 18:00:15 1.1.1.3 +++ gcc/config/svr4.h 2018/04/24 18:20:29 1.1.1.7 @@ -1,8 +1,7 @@ /* svr4.h -- operating system specific defines to be used when targeting GCC for some generic System V Release 4 system. - Copyright (C) 1991 Free Software Foundation, Inc. - - Written by Ron Guilmette (rfg@ncd.com). + Copyright (C) 1991, 1994 Free Software Foundation, Inc. + Contributed by Ron Guilmette (rfg@netcom.com). This file is part of GNU CC. @@ -39,6 +38,9 @@ the Free Software Foundation, 675 Mass A appropriate define for the type of hardware that you are targeting. */ +/* Define a symbol indicating that we are using svr4.h. */ +#define USING_SVR4_H + /* For the sake of libgcc2.c, indicate target supports atexit. */ #define HAVE_ATEXIT @@ -66,8 +68,9 @@ the Free Software Foundation, 675 Mass A there are no such switches except those implemented by GCC itself. */ #define WORD_SWITCH_TAKES_ARG(STR) \ - (!strcmp (STR, "include") || !strcmp (STR, "imacros") \ - || !strcmp (STR, "aux-info")) + (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \ + && strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \ + && strcmp (STR, "Tbss")) /* You should redefine CPP_PREDEFINES in any file which includes this one. The definition should be appropriate for the type of target system @@ -193,10 +196,12 @@ the Free Software Foundation, 675 Mass A .ident string is patterned after the ones produced by native svr4 C compilers. */ +#define IDENT_ASM_OP ".ident" + #define ASM_FILE_END(FILE) \ do { \ - fprintf ((FILE), "\t.ident\t\"GCC: (GNU) %s\"\n", \ - version_string); \ + fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n", \ + IDENT_ASM_OP, version_string); \ } while (0) /* Allow #sccs in preprocessor. */ @@ -206,7 +211,7 @@ do { \ /* Output #ident as a .ident. */ #define ASM_OUTPUT_IDENT(FILE, NAME) \ - fprintf (FILE, "\t.ident \"%s\"\n", NAME); + fprintf (FILE, "\t%s\t\"%s\"\n", IDENT_ASM_OP, NAME); /* Use periods rather than dollar signs in special g++ assembler names. */ @@ -220,6 +225,10 @@ do { \ #define TARGET_MEM_FUNCTIONS +/* Handle #pragma weak and #pragma pack. */ + +#define HANDLE_SYSV_PRAGMA + /* System V Release 4 uses DWARF debugging info. */ #define DWARF_DEBUGGING_INFO @@ -235,6 +244,66 @@ do { \ #undef DBX_REGISTER_NUMBER +/* gas on SVR4 supports the use of .stabs. Permit -gstabs to be used + in general, although it will only work when using gas. */ + +#define DBX_DEBUGGING_INFO + +/* Use DWARF debugging info by default. */ + +#ifndef PREFERRED_DEBUGGING_TYPE +#define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG +#endif + +/* Make LBRAC and RBRAC addresses relative to the start of the + function. The native Solaris stabs debugging format works this + way, gdb expects it, and it reduces the number of relocation + entries. */ + +#define DBX_BLOCKS_FUNCTION_RELATIVE 1 + +/* When using stabs, gcc2_compiled must be a stabs entry, not an + ordinary symbol, or gdb won't see it. Furthermore, since gdb reads + the input piecemeal, starting with each N_SO, it's a lot easier if + the gcc2 flag symbol is *after* the N_SO rather than before it. So + we emit an N_OPT stab there. */ + +#define ASM_IDENTIFY_GCC(FILE) \ +do \ + { \ + if (write_symbols != DBX_DEBUG) \ + fputs ("gcc2_compiled.:\n", FILE); \ + } \ +while (0) + +#define ASM_IDENTIFY_GCC_AFTER_SOURCE(FILE) \ +do \ + { \ + if (write_symbols == DBX_DEBUG) \ + fputs ("\t.stabs\t\"gcc2_compiled.\", 0x3c, 0, 0, 0\n", FILE); \ + } \ +while (0) + +/* Like block addresses, stabs line numbers are relative to the + current function. */ + +#define ASM_OUTPUT_SOURCE_LINE(file, line) \ +do \ + { \ + static int sym_lineno = 1; \ + fprintf (file, ".stabn 68,0,%d,.LM%d-%s\n.LM%d:\n", \ + line, sym_lineno, \ + XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0), \ + sym_lineno); \ + sym_lineno += 1; \ + } \ +while (0) + +/* In order for relative line numbers to work, we must output the + stabs entry for the function name first. */ + +#define DBX_FUNCTION_FIRST + /* Define the actual types of some ANSI-mandated types. (These definitions should work for most SVR4 systems). */ @@ -315,6 +384,28 @@ do { \ sprintf (LABEL, "*.%s%d", PREFIX, NUM); \ } while (0) +/* Output the label which precedes a jumptable. Note that for all svr4 + systems where we actually generate jumptables (which is to say every + svr4 target except i386, where we use casesi instead) we put the jump- + tables into the .rodata section and since other stuff could have been + put into the .rodata section prior to any given jumptable, we have to + make sure that the location counter for the .rodata section gets pro- + perly re-aligned prior to the actual beginning of the jump table. */ + +#define ALIGN_ASM_OP ".align" + +#ifndef ASM_OUTPUT_BEFORE_CASE_LABEL +#define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \ + ASM_OUTPUT_ALIGN ((FILE), 2); +#endif + +#undef ASM_OUTPUT_CASE_LABEL +#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE) \ + do { \ + ASM_OUTPUT_BEFORE_CASE_LABEL (FILE, PREFIX, NUM, JUMPTABLE) \ + ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \ + } while (0) + /* The standard SVR4 assembler seems to require that certain builtin library routines (e.g. .udiv) be explicitly declared as .globl in each assembly file where they are referenced. */ @@ -408,7 +499,7 @@ do { \ #define READONLY_DATA_SECTION() const_section () -extern void text_section(); +extern void text_section (); #define CONST_SECTION_FUNCTION \ void \ @@ -445,6 +536,12 @@ dtors_section () \ } \ } +/* Switch into a generic section. + This is currently only used to support section attributes. */ + +#define ASM_OUTPUT_SECTION(FILE, NAME) \ + fprintf (FILE, ".section\t%s,\"a\",@progbits\n", NAME) + /* A C statement (sans semicolon) to output an element in the table of global constructors. */ #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \ @@ -482,7 +579,10 @@ dtors_section () \ else if (TREE_CODE (DECL) == VAR_DECL) \ { \ if ((flag_pic && RELOC) \ - || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL)) \ + || !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 (); \ @@ -555,15 +655,38 @@ dtors_section () \ putc (',', FILE); \ fprintf (FILE, TYPE_OPERAND_FMT, "object"); \ putc ('\n', FILE); \ - if (!flag_inhibit_size_directive) \ + size_directive_output = 0; \ + if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \ { \ + size_directive_output = 1; \ fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ assemble_name (FILE, NAME); \ - fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (decl))); \ + fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \ } \ ASM_OUTPUT_LABEL(FILE, NAME); \ } while (0) +/* Output the size directive for a decl in rest_of_decl_compilation + in the case where we did not do so before the initializer. + Once we find the error_mark_node, we know that the value of + size_directive_output was set + by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */ + +#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ +do { \ + char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ + if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \ + && ! AT_END && TOP_LEVEL \ + && DECL_INITIAL (DECL) == error_mark_node \ + && !size_directive_output) \ + { \ + size_directive_output = 1; \ + fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ + assemble_name (FILE, name); \ + fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \ + } \ + } while (0) + /* This is how to declare the size of a function. */ #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ @@ -596,10 +719,11 @@ dtors_section () \ in the table. Note that we can use standard UN*X escape sequences for many control characters, but we don't use \a to represent BEL because some svr4 assemblers (e.g. on - the i386) don't know about that. */ + the i386) don't know about that. Also, we don't use \v + since some versions of gas, such as 2.2 did not accept it. */ #define ESCAPES \ -"\1\1\1\1\1\1\1\1btnvfr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\ +"\1\1\1\1\1\1\1\1btn\1fr\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\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\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\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\