diff options
| -rw-r--r-- | gnu/usr.bin/gcc/gcc/config.gcc | 4 | ||||
| -rw-r--r-- | gnu/usr.bin/gcc/gcc/config/arm/openbsd.h | 198 |
2 files changed, 202 insertions, 0 deletions
diff --git a/gnu/usr.bin/gcc/gcc/config.gcc b/gnu/usr.bin/gcc/gcc/config.gcc index 051f599b2de..0d5aea88643 100644 --- a/gnu/usr.bin/gcc/gcc/config.gcc +++ b/gnu/usr.bin/gcc/gcc/config.gcc @@ -694,6 +694,10 @@ arm*-*-netbsdelf*) tm_file="dbxelf.h elfos.h netbsd.h netbsd-elf.h arm/elf.h arm/aout.h arm/arm.h arm/netbsd-elf.h" tmake_file="${tmake_file} arm/t-netbsd" ;; +arm*-*-openbsd*) + tm_file="dbxelf.h elfos.h arm/elf.h arm/aout.h arm/arm.h openbsd.h arm/openbsd.h" + tmake_file="${tmake_file} arm/t-netbsd" + ;; arm*-*-netbsd*) tm_file="arm/aout.h arm/arm.h netbsd.h netbsd-aout.h arm/netbsd.h" tmake_file="t-netbsd arm/t-netbsd" diff --git a/gnu/usr.bin/gcc/gcc/config/arm/openbsd.h b/gnu/usr.bin/gcc/gcc/config/arm/openbsd.h new file mode 100644 index 00000000000..c850af5ddcb --- /dev/null +++ b/gnu/usr.bin/gcc/gcc/config/arm/openbsd.h @@ -0,0 +1,198 @@ +/* Definitions of target machine for GNU compiler, NetBSD/arm ELF version. + Copyright (C) 2002 Free Software Foundation, Inc. + Contributed by Wasabi Systems, 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. */ + +/* Run-time Target Specification. */ +#undef TARGET_VERSION +#define TARGET_VERSION fputs (" (OpenBSD/arm)", stderr); + +/* This is used in ASM_FILE_START. */ +#undef ARM_OS_NAME +#define ARM_OS_NAME "OpenBSD" + +/* Unsigned chars produces much better code than signed. */ +#define DEFAULT_SIGNED_CHAR 0 + + +/* This defaults us to little-endian. */ +#ifndef TARGET_ENDIAN_DEFAULT +#define TARGET_ENDIAN_DEFAULT 0 +#endif + +#undef MULTILIB_DEFAULTS + +/* ARM6 family default cpu. */ +#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6 + +/* Default is to use APCS-32 mode. */ + +/* Default it to use ATPCS with soft-VFP. */ +#undef TARGET_DEFAULT +#define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_FRAME) + +#define TARGET_OS_CPP_BUILTINS() \ + do \ + { \ + OPENBSD_OS_CPP_BUILTINS_ELF(); \ + } \ + while (0) + +#undef SUBTARGET_CPP_SPEC +#define SUBTARGET_CPP_SPEC OBSD_CPP_SPEC + +/* Because TARGET_DEFAULT sets ARM_FLAG_APCS_32 */ +#undef CPP_APCS_PC_DEFAULT_SPEC +#define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__" + +/* Because TARGET_DEFAULT sets ARM_FLAG_SOFT_FLOAT */ +#undef CPP_FLOAT_DEFAULT_SPEC +#define CPP_FLOAT_DEFAULT_SPEC "-D__SOFTFP__" + +/* OBSD_LINK_SPEC appropriate for OpenBSD. Support for GCC options + -static, -assert, and -nostdlib. */ +#undef OBSD_LINK_SPEC +#ifdef OBSD_NO_DYNAMIC_LIBRARIES +#define OBSD_LINK_SPEC \ + "%{g:%{!nostdlib:-L/usr/lib/debug}} %{!nostdlib:%{!r*:%{!e*:-e start}}} -dc -dp %{assert*}" +#else +#define OBSD_LINK_SPEC \ + "%{g:%{!nostdlib:-L/usr/lib/debug}} %{!shared:%{!nostdlib:%{!r*:%{!e*:-e start}}}} %{shared:-Bshareable -x} -dc -dp %{R*} %{static:-Bstatic} %{assert*}" +#endif + +#undef SUBTARGET_EXTRA_SPECS +#define SUBTARGET_EXTRA_SPECS \ + { "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, \ + { "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, \ + { "openbsd_link_spec", OBSD_LINK_SPEC }, \ + { "openbsd_entry_point", OPENBSD_ENTRY_POINT }, + +#define OPENBSD_ENTRY_POINT "__start" + +/* Pass -X to the linker so that it will strip symbols starting with 'L' */ +#undef LINK_SPEC +#define LINK_SPEC \ + "-X %{mbig-endian:-EB} %{mlittle-endian:-EL} \ + %(openbsd_link_spec)" + +/* Make GCC agree with <machine/ansi.h>. */ + +#undef SIZE_TYPE +#define SIZE_TYPE "unsigned int" + +#undef PTRDIFF_TYPE +#define PTRDIFF_TYPE "int" + +/* We don't have any limit on the length as out debugger is GDB. */ +#undef DBX_CONTIN_LENGTH + +/* NetBSD does its profiling differently to the Acorn compiler. We + don't need a word following the mcount call; and to skip it + requires either an assembly stub or use of fomit-frame-pointer when + compiling the profiling functions. Since we break Acorn CC + compatibility below a little more won't hurt. */ + +#undef ARM_FUNCTION_PROFILER +#define ARM_FUNCTION_PROFILER(STREAM,LABELNO) \ +{ \ + asm_fprintf (STREAM, "\tmov\t%Rip, %Rlr\n"); \ + asm_fprintf (STREAM, "\tbl\t__mcount%s\n", \ + NEED_PLT_RELOC ? "(PLT)" : ""); \ +} + +/* On the ARM `@' introduces a comment, so we must use something else + for .type directives. */ +#undef TYPE_OPERAND_FMT +#define TYPE_OPERAND_FMT "%%%s" + +/* NetBSD uses the old PCC style aggregate returning conventions. */ +#undef DEFAULT_PCC_STRUCT_RETURN +#define DEFAULT_PCC_STRUCT_RETURN 1 + +/* Although not normally relevant (since by default, all aggregates + are returned in memory) compiling some parts of libc requires + non-APCS style struct returns. */ +#undef RETURN_IN_MEMORY + + +/* VERY BIG NOTE: Change of structure alignment for NetBSD/arm. + There are consequences you should be aware of... + + Normally GCC/arm uses a structure alignment of 32 for compatibility + with armcc. This means that structures are padded to a word + boundary. However this causes problems with bugged NetBSD kernel + code (possibly userland code as well - I have not checked every + binary). The nature of this bugged code is to rely on sizeof() + returning the correct size of various structures rounded to the + nearest byte (SCSI and ether code are two examples, the vm system + is another). This code breaks when the structure alignment is 32 + as sizeof() will report a word=rounded size. By changing the + structure alignment to 8. GCC will conform to what is expected by + NetBSD. + + This has several side effects that should be considered. + 1. Structures will only be aligned to the size of the largest member. + i.e. structures containing only bytes will be byte aligned. + structures containing shorts will be half word alinged. + structures containing ints will be word aligned. + + This means structures should be padded to a word boundary if + alignment of 32 is required for byte structures etc. + + 2. A potential performance penalty may exist if strings are no longer + word aligned. GCC will not be able to use word load/stores to copy + short strings. + + This modification is not encouraged but with the present state of the + NetBSD source tree it is currently the only solution that meets the + requirements. */ + +#undef DEFAULT_STRUCTURE_SIZE_BOUNDARY +#define DEFAULT_STRUCTURE_SIZE_BOUNDARY 8 + +/* Emit code to set up a trampoline and synchronize the caches. */ +#undef INITIALIZE_TRAMPOLINE +#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \ +do \ + { \ + emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 8)), \ + (CXT)); \ + emit_move_insn (gen_rtx (MEM, SImode, plus_constant ((TRAMP), 12)), \ + (FNADDR)); \ + emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__clear_cache"), \ + 0, VOIDmode, 2, TRAMP, Pmode, \ + plus_constant (TRAMP, TRAMPOLINE_SIZE), Pmode); \ + } \ +while (0) + +/* Clear the instruction cache from `BEG' to `END'. This makes a + call to the ARM_SYNC_ICACHE architecture specific syscall. */ +#define CLEAR_INSN_CACHE(BEG, END) \ +do \ + { \ + extern int sysarch(int number, void *args); \ + struct { \ + unsigned int addr; \ + int len; \ + } s; \ + s.addr = (unsigned int)(BEG); \ + s.len = (END) - (BEG); \ + (void) sysarch (0, &s); \ + } \ +while (0) |