Viewing file:  rtems.h (9.72 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* Definitions for rtems targeting a PowerPC using elf.
Copyright (C) 1996-2022 Free Software Foundation, Inc.
Contributed by Joel Sherrill (joel@OARcorp.com).
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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* Undef gnu-user.h macro we don't want. */
#undef CPLUSPLUS_CPP_SPEC
/* Copy and paste from linux64.h and freebsd64.h */
#ifdef IN_LIBGCC2
#undef TARGET_64BIT
#ifdef __powerpc64__
#define TARGET_64BIT 1
#else
#define TARGET_64BIT 0
#endif
#endif
/* Copy and paste from linux64.h and freebsd64.h */
#undef TARGET_AIX
#define TARGET_AIX TARGET_64BIT
/* Simplified copy and paste from linux64.h and freebsd64.h */
#undef DOT_SYMBOLS
#define DOT_SYMBOLS 0
/* Copy and paste from linux64.h and freebsd64.h */
#undef TARGET_CMODEL
#define TARGET_CMODEL rs6000_current_cmodel
#define SET_CMODEL(opt) rs6000_current_cmodel = opt
#undef TARGET_OS_CPP_BUILTINS
#define TARGET_OS_CPP_BUILTINS() \
do \
{ \
builtin_define ("__rtems__"); \
builtin_define ("__USE_INIT_FINI__"); \
builtin_assert ("system=rtems"); \
if (TARGET_64BIT) \
{ \
builtin_define ("__PPC__"); \
builtin_define ("__PPC64__"); \
builtin_define ("__powerpc64__"); \
builtin_assert ("cpu=powerpc64"); \
builtin_assert ("machine=powerpc64"); \
} \
else \
{ \
builtin_define_std ("PPC"); \
builtin_define_std ("powerpc"); \
builtin_assert ("cpu=powerpc"); \
builtin_assert ("machine=powerpc"); \
TARGET_OS_SYSV_CPP_BUILTINS (); \
} \
} \
while (0)
/* Copy and paste from linux64.h and freebsd64.h */
#undef RELOCATABLE_NEEDS_FIXUP
#define RELOCATABLE_NEEDS_FIXUP \
(rs6000_isa_flags & rs6000_isa_flags_explicit & OPTION_MASK_RELOCATABLE)
/* Copy and paste from linux64.h */
#undef RS6000_ABI_NAME
#define RS6000_ABI_NAME "linux"
/* Copy and paste from linux64.h and freebsd64.h */
#define INVALID_64BIT "%<-m%s%> not supported in this configuration"
/* A lot of copy and paste from linux64.h and freebsd64.h */
#undef SUBSUBTARGET_OVERRIDE_OPTIONS
#define SUBSUBTARGET_OVERRIDE_OPTIONS \
do \
{ \
if (rs6000_isa_flags & OPTION_MASK_64BIT) \
{ \
rs6000_elf_abi = 2; \
rs6000_current_abi = ABI_ELFv2; \
if (rs6000_isa_flags & OPTION_MASK_RELOCATABLE) \
{ \
rs6000_isa_flags &= ~OPTION_MASK_RELOCATABLE; \
error (INVALID_64BIT, "relocatable"); \
} \
if (rs6000_isa_flags & OPTION_MASK_EABI) \
{ \
rs6000_isa_flags &= ~OPTION_MASK_EABI; \
error (INVALID_64BIT, "eabi"); \
} \
if (TARGET_PROTOTYPE) \
{ \
target_prototype = 0; \
error (INVALID_64BIT, "prototype"); \
} \
if ((rs6000_isa_flags & OPTION_MASK_POWERPC64) == 0) \
{ \
rs6000_isa_flags |= OPTION_MASK_POWERPC64; \
error ("%<-m64%> requires a PowerPC64 cpu"); \
} \
if ((rs6000_isa_flags_explicit \
& OPTION_MASK_MINIMAL_TOC) != 0) \
{ \
if (OPTION_SET_P (rs6000_current_cmodel) \
&& rs6000_current_cmodel != CMODEL_SMALL) \
error ("%<-mcmodel%> incompatible with other toc options"); \
SET_CMODEL (CMODEL_SMALL); \
} \
else \
{ \
if (!OPTION_SET_P (rs6000_current_cmodel)) \
SET_CMODEL (CMODEL_MEDIUM); \
if (rs6000_current_cmodel != CMODEL_SMALL) \
{ \
TARGET_NO_FP_IN_TOC = 0; \
TARGET_NO_SUM_IN_TOC = 0; \
} \
} \
} \
} \
while (0)
#undef TARGET_LIBGCC_SDATA_SECTION
#define TARGET_LIBGCC_SDATA_SECTION ".sdata"
/* Copy and paste from linux64.h and freebsd64.h */
#undef SIZE_TYPE
#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
/* Copy and paste from linux64.h and freebsd64.h */
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
/* Copy and paste from freebsd64.h */
#undef WCHAR_TYPE
/* Copy and paste from freebsd64.h */
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 32
/* Copy and paste from linux64.h and freebsd64.h */
#ifdef __powerpc64__
#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
asm (SECTION_OP "\n" \
" bl " #FUNC "\n" \
" nop\n" \
" .previous");
#endif
/* This could be also POWERPC_FREEBSD. It is related to the save/restore
defines below. */
#define POWERPC_LINUX
/* Copy and paste from linux64.h and freebsd64.h */
#undef SAVE_FP_PREFIX
#define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_")
#undef SAVE_FP_SUFFIX
#define SAVE_FP_SUFFIX ""
#undef RESTORE_FP_PREFIX
#define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_")
#undef RESTORE_FP_SUFFIX
#define RESTORE_FP_SUFFIX ""
/* Copy and paste from linux64.h and freebsd64.h */
#undef ASM_PREFERRED_EH_DATA_FORMAT
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
(TARGET_64BIT || flag_pic \
? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \
| (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \
: DW_EH_PE_absptr)
/* Copy and paste from linux64.h and freebsd64.h */
#undef TOC_SECTION_ASM_OP
#define TOC_SECTION_ASM_OP \
(TARGET_64BIT \
? "\t.section\t\".toc\",\"aw\"" \
: "\t.section\t\".got\",\"aw\"")
/* Copy and paste from linux64.h and freebsd64.h */
#undef MINIMAL_TOC_SECTION_ASM_OP
#define MINIMAL_TOC_SECTION_ASM_OP \
(TARGET_64BIT \
? "\t.section\t\".toc1\",\"aw\"" \
: (flag_pic \
? "\t.section\t\".got2\",\"aw\"" \
: "\t.section\t\".got1\",\"aw\""))
/* Copy and paste from linux64.h and freebsd64.h */
#undef ASM_DECLARE_FUNCTION_SIZE
#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
do \
{ \
if (!flag_inhibit_size_directive) \
{ \
fputs ("\t.size\t", (FILE)); \
if (TARGET_64BIT && DOT_SYMBOLS) \
putc ('.', (FILE)); \
assemble_name ((FILE), (FNAME)); \
fputs (",.-", (FILE)); \
rs6000_output_function_entry (FILE, FNAME); \
putc ('\n', (FILE)); \
} \
} \
while (0)
/* Copy and paste from linux64.h and freebsd64.h */
#undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P
#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \
(TARGET_TOC \
&& (SYMBOL_REF_P (X) \
|| (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
&& SYMBOL_REF_P (XEXP (XEXP (X, 0), 0))) \
|| GET_CODE (X) == LABEL_REF \
|| (CONST_INT_P (X) \
&& GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \
|| (CONST_DOUBLE_P (X) \
&& ((TARGET_64BIT \
&& (TARGET_MINIMAL_TOC \
|| (SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
&& ! TARGET_NO_FP_IN_TOC))) \
|| (!TARGET_64BIT \
&& !TARGET_NO_FP_IN_TOC \
&& SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
&& BITS_PER_WORD == HOST_BITS_PER_INT)))))
#undef CPP_OS_DEFAULT_SPEC
#define CPP_OS_DEFAULT_SPEC "\
%{!mcpu*: %{!Dppc*: %{!Dmpc*: -Dmpc750} } }\
%{mcpu=403: %{!Dppc*: %{!Dmpc*: -Dppc403} } } \
%{mcpu=505: %{!Dppc*: %{!Dmpc*: -Dmpc505} } } \
%{mcpu=601: %{!Dppc*: %{!Dmpc*: -Dppc601} } } \
%{mcpu=602: %{!Dppc*: %{!Dmpc*: -Dppc602} } } \
%{mcpu=603: %{!Dppc*: %{!Dmpc*: -Dppc603} } } \
%{mcpu=603e: %{!Dppc*: %{!Dmpc*: -Dppc603e} } } \
%{mcpu=604: %{!Dppc*: %{!Dmpc*: -Dmpc604} } } \
%{mcpu=750: %{!Dppc*: %{!Dmpc*: -Dmpc750} } } \
%{mcpu=821: %{!Dppc*: %{!Dmpc*: -Dmpc821} } } \
%{mcpu=860: %{!Dppc*: %{!Dmpc*: -Dmpc860} } } \
%{mcpu=8540: %{!Dppc*: %{!Dmpc*: -Dppc8540} } } \
%{mcpu=e6500: -D__PPC_CPU_E6500__} \
%{mvrsave: -D__PPC_VRSAVE__}"
#undef ASM_SPEC
#define ASM_SPEC "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)"
#define ASM_SPEC32 "-a32 \
%{mrelocatable} %{mrelocatable-lib} %{" FPIE_OR_FPIC_SPEC ":-K PIC} \
%{memb|msdata=eabi: -memb}"
#define ASM_SPEC64 "-a64"
#define ASM_SPEC_COMMON "%(asm_cpu) \
%{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}" \
ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN)
#undef LINK_OS_DEFAULT_SPEC
#define LINK_OS_DEFAULT_SPEC \
"%{!m64:%(link_os_spec32)}%{m64:%(link_os_spec64)}"
#define LINK_OS_SPEC32 ENDIAN_SELECT(" -m elf32ppc", \
" -m elf32lppc", \
" -m elf32ppc")
#define LINK_OS_SPEC64 ENDIAN_SELECT(" -m elf64ppc", \
" -m elf64lppc", \
" -m elf64ppc")
#undef SUBSUBTARGET_EXTRA_SPECS
#define SUBSUBTARGET_EXTRA_SPECS \
{ "asm_spec_common", ASM_SPEC_COMMON }, \
{ "asm_spec32", ASM_SPEC32 }, \
{ "asm_spec64", ASM_SPEC64 }, \
{ "link_os_spec32", LINK_OS_SPEC32 }, \
{ "link_os_spec64", LINK_OS_SPEC64 },
/* Use gnu-user.h LINK_GCC_SEQUENCE_SPEC for rtems. */
#undef LINK_GCC_C_SEQUENCE_SPEC
#define LINK_GCC_C_SEQUENCE_SPEC \
"%{mads|myellowknife|mmvme|msim:%G %L %G;" \
"!mcall-*|mcall-linux:" GNU_USER_TARGET_LINK_GCC_C_SEQUENCE_SPEC ";" \
":%G %L %G}"
#define RTEMS_STARTFILE_SPEC "ecrti%O%s rtems_crti%O%s crtbegin%O%s"
#define RTEMS_ENDFILE_SPEC "crtend%O%s rtems_crtn%O%s ecrtn%O%s"
|
