diff options
author | Dale Rahn <drahn@cvs.openbsd.org> | 2003-04-17 03:46:23 +0000 |
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committer | Dale Rahn <drahn@cvs.openbsd.org> | 2003-04-17 03:46:23 +0000 |
commit | 947f64b4d9f811dc085475f610c24dfe35243518 (patch) | |
tree | 3bbc69313c7669d9f3e81f2e98339a6c5e64a5d1 /gnu/egcs/gcc | |
parent | 0019be2edbe117052bcac6bf9686ab6812a41da6 (diff) |
Change gcc to generate ELF code for i386.
Diffstat (limited to 'gnu/egcs/gcc')
-rw-r--r-- | gnu/egcs/gcc/config.gcc | 12 | ||||
-rw-r--r-- | gnu/egcs/gcc/config/i386/openbsdelf.h | 213 |
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}" |