From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/config/arm/netbsd-elf.h | 157 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 gcc/config/arm/netbsd-elf.h (limited to 'gcc/config/arm/netbsd-elf.h') diff --git a/gcc/config/arm/netbsd-elf.h b/gcc/config/arm/netbsd-elf.h new file mode 100644 index 000000000..9cf186b33 --- /dev/null +++ b/gcc/config/arm/netbsd-elf.h @@ -0,0 +1,157 @@ +/* Definitions of target machine for GNU compiler, NetBSD/arm ELF version. + Copyright (C) 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc. + Contributed by Wasabi Systems, Inc. + + This file is part of GCC. + + GCC 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 3, or (at your + option) any later version. + + GCC 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 GCC; see the file COPYING3. If not see + . */ + +/* Run-time Target Specification. */ +#undef TARGET_VERSION +#define TARGET_VERSION fputs (" (NetBSD/arm ELF)", stderr); + +/* arm.h defaults to ARM6 CPU. */ + +/* This defaults us to little-endian. */ +#ifndef TARGET_ENDIAN_DEFAULT +#define TARGET_ENDIAN_DEFAULT 0 +#endif + +#undef MULTILIB_DEFAULTS + +/* Default it to use ATPCS with soft-VFP. */ +#undef TARGET_DEFAULT +#define TARGET_DEFAULT \ + (MASK_APCS_FRAME \ + | TARGET_ENDIAN_DEFAULT) + +#undef ARM_DEFAULT_ABI +#define ARM_DEFAULT_ABI ARM_ABI_ATPCS + +#define TARGET_OS_CPP_BUILTINS() \ + do \ + { \ + NETBSD_OS_CPP_BUILTINS_ELF(); \ + } \ + while (0) + +#undef SUBTARGET_CPP_SPEC +#define SUBTARGET_CPP_SPEC NETBSD_CPP_SPEC + +#undef SUBTARGET_EXTRA_ASM_SPEC +#define SUBTARGET_EXTRA_ASM_SPEC \ + "-matpcs %{fpic|fpie:-k} %{fPIC|fPIE:-k}" + +/* Default to full VFP if -mhard-float is specified. */ +#undef SUBTARGET_ASM_FLOAT_SPEC +#define SUBTARGET_ASM_FLOAT_SPEC \ + "%{mhard-float:{!mfpu=*:-mfpu=vfp}} \ + %{mfloat-abi=hard:{!mfpu=*:-mfpu=vfp}}" + +#undef SUBTARGET_EXTRA_SPECS +#define SUBTARGET_EXTRA_SPECS \ + { "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, \ + { "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, \ + { "netbsd_link_spec", NETBSD_LINK_SPEC_ELF }, \ + { "netbsd_entry_point", NETBSD_ENTRY_POINT }, + +#define NETBSD_ENTRY_POINT "__start" + +#undef LINK_SPEC +#define LINK_SPEC \ + "-X %{mbig-endian:-EB} %{mlittle-endian:-EL} \ + %(netbsd_link_spec)" + +/* Make GCC agree with . */ + +#undef SIZE_TYPE +#define SIZE_TYPE "long unsigned int" + +#undef PTRDIFF_TYPE +#define PTRDIFF_TYPE "long 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", \ + (TARGET_ARM && NEED_PLT_RELOC) \ + ? "(PLT)" : ""); \ +} + +/* 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 aligned. + 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 + +/* 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) + +#undef FPUTYPE_DEFAULT +#define FPUTYPE_DEFAULT "vfp" + -- cgit v1.2.3