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authorDale Rahn <drahn@cvs.openbsd.org>2003-04-17 03:46:23 +0000
committerDale Rahn <drahn@cvs.openbsd.org>2003-04-17 03:46:23 +0000
commit947f64b4d9f811dc085475f610c24dfe35243518 (patch)
tree3bbc69313c7669d9f3e81f2e98339a6c5e64a5d1 /gnu/egcs/gcc
parent0019be2edbe117052bcac6bf9686ab6812a41da6 (diff)
Change gcc to generate ELF code for i386.
Diffstat (limited to 'gnu/egcs/gcc')
-rw-r--r--gnu/egcs/gcc/config.gcc12
-rw-r--r--gnu/egcs/gcc/config/i386/openbsdelf.h213
2 files changed, 224 insertions, 1 deletions
diff --git a/gnu/egcs/gcc/config.gcc b/gnu/egcs/gcc/config.gcc
index af9e9638719..5267fe28ad0 100644
--- a/gnu/egcs/gcc/config.gcc
+++ b/gnu/egcs/gcc/config.gcc
@@ -717,13 +717,23 @@ i[34567]86-*-netbsd*)
tmake_file=t-netbsd
use_collect2=yes
;;
-i[34567]86-*-openbsd*)
+# Change ...[012] to i[34567]86-*-openbsd3.[0123] after we move to 3.4
+i[34567]86-*-openbsd2* | i[34567]86-*-openbsd3.[012])
# needed to unconfuse gdb
tm_file="${tm_file} exec-stack.h"
tmake_file="t-libc-ok t-openbsd i386/t-openbsd"
# we need collect2 until our bug is fixed...
use_collect2=yes
;;
+i[34567]86-*-openbsd*)
+ # needed to unconfuse gdb
+ tm_file="${tm_file} exec-stack.h"
+ tmake_file="t-libc-ok t-openbsd i386/t-openbsd"
+ tm_file="i386/i386.h i386/att.h svr4.h i386/openbsdelf.h i386/perform.h"
+ gas=yes
+ gnu_ld=yes
+ stabs=yes
+ ;;
i[34567]86-*-coff*)
tm_file=i386/i386-coff.h
tmake_file=i386/t-i386bare
diff --git a/gnu/egcs/gcc/config/i386/openbsdelf.h b/gnu/egcs/gcc/config/i386/openbsdelf.h
new file mode 100644
index 00000000000..1fee2094377
--- /dev/null
+++ b/gnu/egcs/gcc/config/i386/openbsdelf.h
@@ -0,0 +1,213 @@
+/* Configuration for an OpenBSD i386 target.
+
+ Copyright (C) 1999 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. */
+
+/* Get generic OpenBSD definitions. */
+#include <openbsd.h>
+
+/* This gets defined in tm.h->linux.h->svr4.h, and keeps us from using
+ libraries compiled with the native cc, so undef it. */
+#undef NO_DOLLAR_IN_LABEL
+
+/* Override the default comment-starter of "/". */
+#undef ASM_COMMENT_START
+#define ASM_COMMENT_START "#"
+
+
+/* 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)
+
+/* Run-time target specifications */
+#define CPP_PREDEFINES "-D__unix__ -D__ELF__ -D__i386__ -D__OpenBSD__ -Asystem(unix) -Asystem(OpenBSD) -Acpu(i386) -Amachine(i386)"
+
+/* As an elf system, we need crtbegin/crtend stuff. */
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC "\
+ %{!shared: %{pg:gcrt0%O%s} %{!pg:%{p:gcrt0%O%s} %{!p:crt0%O%s}} \
+ crtbegin%O%s} %{shared:crtbeginS%O%s}"
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}"
+
+/* Layout of source language data types. */
+
+/* This must agree with <machine/ansi.h> */
+#undef SIZE_TYPE
+#define SIZE_TYPE "unsigned int"
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE "int"
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "int"
+
+#undef WCHAR_UNSIGNED
+#define WCHAR_UNSIGNED 0
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE BITS_PER_WORD
+
+/* Assembler format: overall framework. */
+
+#undef ASM_APP_ON
+#define ASM_APP_ON "#APP\n"
+
+#undef ASM_APP_OFF
+#define ASM_APP_OFF "#NO_APP\n"
+
+#undef SET_ASM_OP
+#define SET_ASM_OP ".set"
+
+/* The following macros were originally stolen from i386v4.h.
+ These have to be defined to get PIC code correct. */
+
+/* Assembler format: dispatch tables. */
+
+/* How to output an element of a case-vector that is relative.
+ This is only used for PIC code. See comments by the `casesi' insn in
+ i386.md for an explanation of the expression this outputs. */
+#undef ASM_OUTPUT_ADDR_DIFF_ELT
+#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
+ fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE)
+
+/* Use stabs instead of DWARF debug format. */
+#undef PREFERRED_DEBUGGING_TYPE
+#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
+
+/* Copy this from the svr4 specifications... */
+/* Define the register numbers to be used in Dwarf debugging information.
+ The SVR4 reference port C compiler uses the following register numbers
+ in its Dwarf output code:
+ 0 for %eax (gnu regno = 0)
+ 1 for %ecx (gnu regno = 2)
+ 2 for %edx (gnu regno = 1)
+ 3 for %ebx (gnu regno = 3)
+ 4 for %esp (gnu regno = 7)
+ 5 for %ebp (gnu regno = 6)
+ 6 for %esi (gnu regno = 4)
+ 7 for %edi (gnu regno = 5)
+ The following three DWARF register numbers are never generated by
+ the SVR4 C compiler or by the GNU compilers, but SDB on x86/svr4
+ believes these numbers have these meanings.
+ 8 for %eip (no gnu equivalent)
+ 9 for %eflags (no gnu equivalent)
+ 10 for %trapno (no gnu equivalent)
+ It is not at all clear how we should number the FP stack registers
+ for the x86 architecture. If the version of SDB on x86/svr4 were
+ a bit less brain dead with respect to floating-point then we would
+ have a precedent to follow with respect to DWARF register numbers
+ for x86 FP registers, but the SDB on x86/svr4 is so completely
+ broken with respect to FP registers that it is hardly worth thinking
+ of it as something to strive for compatibility with.
+ The version of x86/svr4 SDB I have at the moment does (partially)
+ seem to believe that DWARF register number 11 is associated with
+ the x86 register %st(0), but that's about all. Higher DWARF
+ register numbers don't seem to be associated with anything in
+ particular, and even for DWARF regno 11, SDB only seems to under-
+ stand that it should say that a variable lives in %st(0) (when
+ asked via an `=' command) if we said it was in DWARF regno 11,
+ but SDB still prints garbage when asked for the value of the
+ variable in question (via a `/' command).
+ (Also note that the labels SDB prints for various FP stack regs
+ when doing an `x' command are all wrong.)
+ Note that these problems generally don't affect the native SVR4
+ C compiler because it doesn't allow the use of -O with -g and
+ because when it is *not* optimizing, it allocates a memory
+ location for each floating-point variable, and the memory
+ location is what gets described in the DWARF AT_location
+ attribute for the variable in question.
+ Regardless of the severe mental illness of the x86/svr4 SDB, we
+ do something sensible here and we use the following DWARF
+ register numbers. Note that these are all stack-top-relative
+ numbers.
+ 11 for %st(0) (gnu regno = 8)
+ 12 for %st(1) (gnu regno = 9)
+ 13 for %st(2) (gnu regno = 10)
+ 14 for %st(3) (gnu regno = 11)
+ 15 for %st(4) (gnu regno = 12)
+ 16 for %st(5) (gnu regno = 13)
+ 17 for %st(6) (gnu regno = 14)
+ 18 for %st(7) (gnu regno = 15)
+*/
+#undef DBX_REGISTER_NUMBER
+#define DBX_REGISTER_NUMBER(n) \
+((n) == 0 ? 0 \
+ : (n) == 1 ? 2 \
+ : (n) == 2 ? 1 \
+ : (n) == 3 ? 3 \
+ : (n) == 4 ? 6 \
+ : (n) == 5 ? 7 \
+ : (n) == 6 ? 5 \
+ : (n) == 7 ? 4 \
+ : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (n)+3 \
+ : (-1))
+
+/* Assembler format: sections. */
+
+/* Indicate when jump tables go in the text section. This is
+ necessary when compiling PIC code. */
+#define JUMP_TABLES_IN_TEXT_SECTION (flag_pic)
+
+/* Stack & calling: aggregate returns. */
+
+/* Don't default to pcc-struct-return, because gcc is the only compiler, and
+ we want to retain compatibility with older gcc versions. */
+#define DEFAULT_PCC_STRUCT_RETURN 0
+
+/* Assembler format: alignment output. */
+
+#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
+#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
+ if ((LOG) != 0) {\
+ if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
+ else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
+ }
+#endif
+
+/* Stack & calling: profiling. */
+
+/* OpenBSD's profiler recovers all information from the stack pointer.
+ The icky part is not here, but in machine/profile.h. */
+#undef FUNCTION_PROFILER
+#define FUNCTION_PROFILER(FILE, LABELNO) \
+ fputs (flag_pic ? "\tcall mcount@PLT\n": "\tcall mcount\n", FILE);
+
+/* Assembler format: exception region output. */
+
+/* All configurations that don't use elf must be explicit about not using
+ dwarf unwind information. egcs doesn't try too hard to check internal
+ configuration files... */
+#define DWARF2_UNWIND_INFO 0
+
+/* Assembler format: alignment output. */
+
+/* Note that we pick up ASM_OUTPUT_MAX_SKIP_ALIGN from i386/gas.h */
+
+/* Note that we pick up ASM_OUTPUT_MI_THUNK from unix.h. */
+
+#undef LINK_SPEC
+#define LINK_SPEC \
+ "%{!shared:%{!nostdlib:%{!r*:%{!e*:-e __start}}}} \
+ %{shared:-shared} %{R*} \
+ %{static:-Bstatic} \
+ %{!static:-Bdynamic} \
+ %{assert*} \
+ %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.so}"