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[src/trunk]: src/gnu/dist/toolchain/gcc/config/i386 Update i386 support; nati...
details: https://anonhg.NetBSD.org/src/rev/31606802e43f
branches: trunk
changeset: 510476:31606802e43f
user: tv <tv%NetBSD.org@localhost>
date: Wed May 30 09:05:09 2001 +0000
description:
Update i386 support; native and cross now works properly with an i386 target.
diffstat:
gnu/dist/toolchain/gcc/config/i386/netbsd-elf.h | 518 +++++++++++++++++++++++-
gnu/dist/toolchain/gcc/config/i386/xm-netbsd.h | 23 -
2 files changed, 510 insertions(+), 31 deletions(-)
diffs (truncated from 605 to 300 lines):
diff -r 98eefab406d3 -r 31606802e43f gnu/dist/toolchain/gcc/config/i386/netbsd-elf.h
--- a/gnu/dist/toolchain/gcc/config/i386/netbsd-elf.h Wed May 30 09:04:13 2001 +0000
+++ b/gnu/dist/toolchain/gcc/config/i386/netbsd-elf.h Wed May 30 09:05:09 2001 +0000
@@ -24,29 +24,109 @@
/* Get generic i386 definitions. */
-/* This goes away when the math-emulator is fixed */
-#define TARGET_CPU_DEFAULT 0400 /* TARGET_NO_FANCY_MATH_387 */
-
#include <i386/gstabs.h>
/* Get perform_* macros to build libgcc.a. */
#include <i386/perform.h>
-/* Start with generic ELF definitions. */
-#include "elfos.h"
-
/* Get generic NetBSD ELF definitions. We will override these if necessary. */
#define NETBSD_ELF
#include <netbsd.h>
+#define OBJECT_FORMAT_ELF
+
+/* This goes away when the math-emulator is fixed */
+#undef TARGET_DEFAULT
+#define TARGET_DEFAULT \
+ (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387)
+
+/*
+ * DBX stabs definitions. Same as Solaris and other i386 ELF platforms.
+ */
+
+#undef DBX_CONTIN_CHAR
+#define DBX_CONTIN_CHAR '?'
+
+/* When generating stabs debugging, use N_BINCL entries. */
+
+#define DBX_USE_BINCL
+
+/* 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-", \
+ line, sym_lineno); \
+ assemble_name (file, \
+ XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
+ fprintf (file, "\n.LM%d:\n", 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
+
+/* Generate a blank trailing N_SO to mark the end of the .o file, since
+ we can't depend upon the linker to mark .o file boundaries with
+ embedded stabs. (XXX do we need this?) */
+
+#define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
+do \
+ { \
+ text_section (); \
+ fprintf (FILE, \
+ "\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO); \
+ } \
+while (0)
+
+
#undef ASM_FINAL_SPEC
-/* Names to predefine in the preprocessor for this target machine. */
+/* Names to predefine in the preprocessor for this target machine.
+ XXX NetBSD, by convention, shouldn't do __alpha, but lots of applications
+ expect it because that's what OSF/1 does. */
+
+/* NetBSD Extension to GNU C: __KPRINTF_ATTRIBUTE__ */
#undef CPP_PREDEFINES
#define CPP_PREDEFINES "\
--Dunix -Di386 -D__NetBSD__ -D__ELF__ \
+-Di386 -D__NetBSD__ -D__ELF__ -D__KPRINTF_ATTRIBUTE__ \
-Asystem(unix) -Asystem(NetBSD) -Acpu(i386) -Amachine(i386)"
/* Make gcc agree with <machine/ansi.h> */
@@ -79,6 +159,13 @@
#define bsd4_4
#undef HAS_INIT_SECTION
+#undef ASM_FILE_START
+#define ASM_FILE_START(FILE) \
+{ \
+ output_file_directive (FILE, main_input_filename); \
+ fprintf (FILE, "\t.version\t\"01.01\"\n"); \
+}
+
/* Provide a LINK_SPEC appropriate for a NetBSD/alpha ELF target. Only
the linker emulation is i386-specific. The rest are
common to all ELF targets, except for the name of the start function. */
@@ -99,10 +186,377 @@
#undef DEFAULT_VTABLE_THUNKS
#define DEFAULT_VTABLE_THUNKS 1
+/* Attach a special .ident directive to the end of the file to identify
+ the version of GCC which compiled this code. The format of the
+ .ident string is patterned after the ones produced by native svr4
+ C compilers. */
+
+/* Output #ident as a .ident. */
+
+/* This is how to allocate empty space in some section. The .zero
+ pseudo-op is used for this on most svr4 assemblers. */
+#undef SKIP_ASM_OP
+#define SKIP_ASM_OP "\t.zero"
+
+#undef ASM_OUTPUT_SKIP
+#define ASM_OUTPUT_SKIP(FILE,SIZE) \
+ fprintf (FILE, "\t%s\t%u\n", SKIP_ASM_OP, (SIZE))
+
+/* 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. */
+
+#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
+ ASM_GLOBALIZE_LABEL (FILE, XSTR (FUN, 0))
+
+/* This says how to output assembler code to declare an
+ uninitialized external 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. */
+
+#define COMMON_ASM_OP ".comm"
+
#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1 << (LOG))
+#undef ASM_OUTPUT_ALIGNED_COMMON
+#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
+do { \
+ fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \
+ assemble_name ((FILE), (NAME)); \
+ fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \
+} while (0)
+
+/* 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. */
+
+#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); \
+} while (0)
+
+/* This is the pseudo-op used to generate a 32-bit word of data with a
+ specific value in some section. */
+
+#define INT_ASM_OP ".long"
+
+/* 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. */
+
+#undef ASCII_DATA_ASM_OP
+#define ASCII_DATA_ASM_OP ".ascii"
+
+/* 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. */
+
+#define USE_CONST_SECTION 1
+
+#define CONST_SECTION_ASM_OP ".section\t.rodata"
+
+/* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
+
+ Note that we want to give these sections the SHF_WRITE attribute
+ because these sections will actually contain data (i.e. tables of
+ addresses of functions in the current root executable or shared library
+ file) and, in the case of a shared library, the relocatable addresses
+ will have to be properly resolved/relocated (and then written into) by
+ the dynamic linker when it actually attaches the given shared library
+ to the executing process. (Note that on SVR4, you may wish to use the
+ `-z text' option to the ELF linker, when building a shared library, as
+ an additional check that you are doing everything right. But if you do
+ use the `-z text' option when building a shared library, you will get
+ errors unless the .ctors and .dtors sections are marked as writable
+ via the SHF_WRITE attribute.) */
+
+#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\""
+#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"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.
+ The definitions say how to change sections to the .init and .fini
+ sections. This is the same for all known svr4 assemblers. */
+
+#define INIT_SECTION_ASM_OP ".section\t.init"
+#define FINI_SECTION_ASM_OP ".section\t.fini"
+
+/* 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
+
+/* A default list of extra section function definitions. 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_SECTION_FUNCTIONS
+#define EXTRA_SECTION_FUNCTIONS \
+ CONST_SECTION_FUNCTION \
+ CTORS_SECTION_FUNCTION \
+ DTORS_SECTION_FUNCTION
+
+#undef READONLY_DATA_SECTION
+#define READONLY_DATA_SECTION() const_section ()
+
+extern void text_section ();
+
+#define CONST_SECTION_FUNCTION \
+void \
+const_section () \
+{ \
+ if (!USE_CONST_SECTION) \
+ text_section(); \
+ else if (in_section != in_const) \
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