freebsd.h revision 169711 
1/* Definitions for StrongARM running FreeBSD using the ELF format
2   Copyright (C) 2001, 2004 Free Software Foundation, Inc.
3   Contributed by David E. O'Brien <obrien@FreeBSD.org> and BSDi.
4
5   This file is part of GCC.
6
7   GCC is free software; you can redistribute it and/or modify it
8   under the terms of the GNU General Public License as published
9   by the Free Software Foundation; either version 2, or (at your
10   option) any later version.
11
12   GCC is distributed in the hope that it will be useful, but WITHOUT
13   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
15   License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with GCC; see the file COPYING.  If not, write to
19   the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20   Boston, MA 02110-1301, USA.  */
21
22#undef  SUBTARGET_CPP_SPEC
23#define SUBTARGET_CPP_SPEC FBSD_CPP_SPEC
24
25#undef  SUBTARGET_EXTRA_SPECS
26#define SUBTARGET_EXTRA_SPECS \
27  { "subtarget_extra_asm_spec",	SUBTARGET_EXTRA_ASM_SPEC }, \
28  { "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, \
29  { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
30
31#undef SUBTARGET_EXTRA_ASM_SPEC
32#define SUBTARGET_EXTRA_ASM_SPEC	\
33  "-matpcs %{fpic|fpie:-k} %{fPIC|fPIE:-k}"
34
35/* Default to full FPA if -mhard-float is specified. */
36#undef SUBTARGET_ASM_FLOAT_SPEC
37#define SUBTARGET_ASM_FLOAT_SPEC		\
38  "%{mhard-float:-mfpu=fpa}			\
39   %{mfloat-abi=hard:{!mfpu=*:-mfpu=fpa}}	\
40   %{!mhard-float: %{msoft-float:-mfpu=softvfp;:-mfpu=softvfp}}"
41
42#undef	LINK_SPEC
43#define LINK_SPEC "							\
44  %{p:%nconsider using `-pg' instead of `-p' with gprof(1) }		\
45  %{v:-V}								\
46  %{assert*} %{R*} %{rpath*} %{defsym*}					\
47  %{shared:-Bshareable %{h*} %{soname*}}				\
48  %{!shared:								\
49    %{!static:								\
50      %{rdynamic:-export-dynamic}					\
51      %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }}	\
52    %{static:-Bstatic}}							\
53  %{symbolic:-Bsymbolic}						\
54  -X %{mbig-endian:-EB} %{mlittle-endian:-EL}"
55
56/************************[  Target stuff  ]***********************************/
57
58#undef  TARGET_VERSION
59#define TARGET_VERSION fprintf (stderr, " (FreeBSD/StrongARM ELF)");
60
61#ifndef TARGET_ENDIAN_DEFAULT
62#define TARGET_ENDIAN_DEFAULT 0
63#endif
64
65/* Default it to use ATPCS with soft-VFP.  */
66#undef TARGET_DEFAULT
67#define TARGET_DEFAULT			\
68  (MASK_APCS_FRAME			\
69   | TARGET_ENDIAN_DEFAULT)
70
71#undef ARM_DEFAULT_ABI
72#define ARM_DEFAULT_ABI ARM_ABI_ATPCS
73
74/* Define the actual types of some ANSI-mandated types.
75   Needs to agree with <machine/ansi.h>.  GCC defaults come from c-decl.c,
76   c-common.c, and config/<arch>/<arch>.h.  */
77
78/* arm.h gets this wrong for FreeBSD.  We use the GCC defaults instead.  */
79
80#undef  SIZE_TYPE
81#define SIZE_TYPE	"unsigned int"
82
83#undef  PTRDIFF_TYPE
84#define PTRDIFF_TYPE	"int"
85
86/* We use the GCC defaults here.  */
87#undef WCHAR_TYPE
88
89#undef  SUBTARGET_CPU_DEFAULT
90#define SUBTARGET_CPU_DEFAULT	TARGET_CPU_strongarm
91
92/* FreeBSD does its profiling differently to the Acorn compiler. We
93   don't need a word following the mcount call; and to skip it
94   requires either an assembly stub or use of fomit-frame-pointer when
95   compiling the profiling functions.  Since we break Acorn CC
96   compatibility below a little more won't hurt.  */
97
98#undef ARM_FUNCTION_PROFILER
99#define ARM_FUNCTION_PROFILER(STREAM,LABELNO)		\
100{							\
101  asm_fprintf (STREAM, "\tmov\t%Rip, %Rlr\n");		\
102  asm_fprintf (STREAM, "\tbl\t__mcount%s\n",		\
103	       (TARGET_ARM && NEED_PLT_RELOC)		\
104	       ? "(PLT)" : "");				\
105}
106
107/* Clear the instruction cache from `BEG' to `END'.  This makes a
108   call to the ARM_SYNC_ICACHE architecture specific syscall.  */
109#define CLEAR_INSN_CACHE(BEG, END)					\
110do									\
111  {									\
112    extern int sysarch(int number, void *args);				\
113    struct								\
114      {									\
115	unsigned int addr;						\
116	int          len;						\
117      } s;								\
118    s.addr = (unsigned int)(BEG);					\
119    s.len = (END) - (BEG);						\
120    (void) sysarch (0, &s);						\
121  }									\
122while (0)
123