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gcc/gcc/config/sh/linux.h

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/* Definitions for SH running Linux-based GNU systems using ELF
Copyright (C) 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
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 this program; 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 (" (SH GNU/Linux with ELF)", stderr);
/* We're not SYSVR4, not having /usr/ccs */
#undef MD_EXEC_PREFIX
#undef MD_STARTFILE_PREFIX
/* This was defined in linux.h. Define it here also. */
#define HANDLE_PRAGMA_PACK_PUSH_POP
/* Don't assume anything about the header files. */
#define NO_IMPLICIT_EXTERN_C
/* The GNU C++ standard library requires that these macros be defined. */
#undef CPLUSPLUS_CPP_SPEC
#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
/* Enable DWARF 2 exceptions. */
#undef DWARF2_UNWIND_INFO
#define DWARF2_UNWIND_INFO 1
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
(flag_pic \
? ((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4 \
: DW_EH_PE_absptr)
#undef SUBTARGET_CPP_SPEC
#define SUBTARGET_CPP_SPEC "\
%{posix:-D_POSIX_SOURCE} \
%{pthread:-D_REENTRANT -D_PTHREADS} \
"
#define TARGET_OS_CPP_BUILTINS() \
do { \
builtin_define_std ("unix"); \
builtin_define ("__gnu_linux__"); \
builtin_define_std ("linux"); \
builtin_assert ("system=posix"); \
} while (0)
#undef TARGET_DEFAULT
#define TARGET_DEFAULT \
(TARGET_CPU_DEFAULT | USERMODE_BIT | TARGET_ENDIAN_DEFAULT)
#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
#undef SUBTARGET_LINK_EMUL_SUFFIX
#define SUBTARGET_LINK_EMUL_SUFFIX "_linux"
#undef SUBTARGET_LINK_SPEC
#define SUBTARGET_LINK_SPEC \
"%{shared:-shared} \
%{!static: \
%{rdynamic:-export-dynamic} \
%{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
%{static:-static}"
#undef LIB_SPEC
#define LIB_SPEC \
"%{pthread:-lpthread} \
%{shared: -lc} \
%{!static:-rpath-link %R/lib:%R/usr/lib} \
%{!shared: \
%{mieee-fp:-lieee} \
%{profile:-lc_p} %{!profile: -lc}}"
#if defined(HAVE_LD_EH_FRAME_HDR)
#undef LINK_EH_SPEC
#define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
#endif
#undef STARTFILE_SPEC
#if defined HAVE_LD_PIE
#define STARTFILE_SPEC \
"%{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} \
crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
#else
#define STARTFILE_SPEC \
"%{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \
crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
#endif
#undef ENDFILE_SPEC
#define ENDFILE_SPEC \
"%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
#define LINK_GCC_C_SEQUENCE_SPEC \
"%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
/* Output assembler code to STREAM to call the profiler. */
#undef FUNCTION_PROFILER
#define FUNCTION_PROFILER(STREAM,LABELNO) \
do { \
if (flag_pic) \
{ \
fprintf (STREAM, "\tmov.l\t3f,r1\n"); \
fprintf (STREAM, "\tmova\t3f,r0\n"); \
fprintf (STREAM, "\tadd\tr1,r0\n"); \
fprintf (STREAM, "\tmov.l\t1f,r1\n"); \
fprintf (STREAM, "\tmov.l\t@(r0,r1),r1\n"); \
} \
else \
fprintf (STREAM, "\tmov.l\t1f,r1\n"); \
fprintf (STREAM, "\tsts.l\tpr,@-r15\n"); \
fprintf (STREAM, "\tmova\t2f,r0\n"); \
fprintf (STREAM, "\tjmp\t@r1\n"); \
fprintf (STREAM, "\tlds\tr0,pr\n"); \
fprintf (STREAM, "\t.align\t2\n"); \
if (flag_pic) \
{ \
fprintf (STREAM, "1:\t.long\tmcount@GOT\n"); \
fprintf (STREAM, "3:\t.long\t_GLOBAL_OFFSET_TABLE_\n"); \
} \
else \
fprintf (STREAM, "1:\t.long\tmcount\n"); \
fprintf (STREAM, "2:\tlds.l\t@r15+,pr\n"); \
} while (0)
/* Do code reading to identify a signal frame, and set the frame
state data appropriately. See unwind-dw2.c for the structs. */
#ifdef IN_LIBGCC2
#include <signal.h>
#include <sys/ucontext.h>
#include "insn-constants.h"
# if defined (__SH5__)
#define SH_DWARF_FRAME_GP0 0
#define SH_DWARF_FRAME_FP0 (__SH5__ == 32 ? 245 : 77)
#define SH_DWARF_FRAME_XD0 289
#define SH_DWARF_FRAME_BT0 68
#define SH_DWARF_FRAME_PR 241
#define SH_DWARF_FRAME_PR_MEDIA 18
#define SH_DWARF_FRAME_GBR 238
#define SH_DWARF_FRAME_MACH 239
#define SH_DWARF_FRAME_MACL 240
#define SH_DWARF_FRAME_PC 64
#define SH_DWARF_FRAME_SR 65
#define SH_DWARF_FRAME_FPUL 244
#define SH_DWARF_FRAME_FPSCR 243
#else
#define SH_DWARF_FRAME_GP0 0
#define SH_DWARF_FRAME_FP0 25
#define SH_DWARF_FRAME_XD0 87
#define SH_DWARF_FRAME_PR 17
#define SH_DWARF_FRAME_GBR 19
#define SH_DWARF_FRAME_MACH 20
#define SH_DWARF_FRAME_MACL 21
#define SH_DWARF_FRAME_PC 16
#define SH_DWARF_FRAME_SR 22
#define SH_DWARF_FRAME_FPUL 23
#define SH_DWARF_FRAME_FPSCR 24
#endif /* defined (__SH5__) */
#if defined (__SH5__)
/* MD_FALLBACK_FRAME_STATE_FOR is not yet defined for SHMEDIA. */
#else /* defined (__SH5__) */
#if defined (__SH3E__) || defined (__SH4__)
#define SH_FALLBACK_FRAME_FLOAT_STATE(SC, FS, CFA) \
do { \
int i_, r_; \
\
r_ = SH_DWARF_FRAME_FP0; \
for (i_ = 0; i_ < 16; i_++) \
{ \
(FS)->regs.reg[r_+i_].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[r_+i_].loc.offset \
= (long)&((SC)->sc_fpregs[i_]) - (CFA); \
} \
\
r_ = SH_DWARF_FRAME_XD0 ; \
for (i_ = 0; i_ < 8; i_++) \
{ \
(FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[i_].loc.offset \
= (long)&((SC)->sc_xfpregs[2*i_]) - (CFA); \
} \
\
(FS)->regs.reg[SH_DWARF_FRAME_FPUL].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[SH_DWARF_FRAME_FPUL].loc.offset \
= (long)&((SC)->sc_fpul) - (CFA); \
(FS)->regs.reg[SH_DWARF_FRAME_FPSCR].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[SH_DWARF_FRAME_FPSCR].loc.offset \
= (long)&((SC)->sc_fpscr) - (CFA); \
} while (0)
#else
#define SH_FALLBACK_FRAME_FLOAT_STATE(SC, FS, CFA)
#endif
#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
do { \
unsigned char *pc_ = (CONTEXT)->ra; \
struct sigcontext *sc_; \
long new_cfa_; \
int i_; \
\
/* mov.w 1f,r3; trapa #0x10; 1: .short 0x77 (sigreturn) */ \
/* mov.w 1f,r3; trapa #0x10; 1: .short 0xad (rt_sigreturn) */ \
if ((*(unsigned short *) (pc_+0) == 0x9300) \
&& (*(unsigned short *) (pc_+2) == 0xc310) \
&& (*(unsigned short *) (pc_+4) == 0x0077)) \
sc_ = (CONTEXT)->cfa; \
else if ((*(unsigned short *) (pc_+0) == 0x9300) \
&& (*(unsigned short *) (pc_+2) == 0xc310) \
&& (*(unsigned short *) (pc_+4) == 0x00ad)) \
{ \
struct rt_sigframe { \
struct siginfo info; \
struct ucontext uc; \
} *rt_ = (CONTEXT)->cfa; \
sc_ = (struct sigcontext *) &rt_->uc.uc_mcontext; \
} \
else \
break; \
\
new_cfa_ = sc_->sc_regs[15]; \
(FS)->cfa_how = CFA_REG_OFFSET; \
(FS)->cfa_reg = 15; \
(FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \
\
for (i_ = 0; i_ < 15; i_++) \
{ \
(FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[i_].loc.offset \
= (long)&(sc_->sc_regs[i_]) - new_cfa_; \
} \
\
(FS)->regs.reg[SH_DWARF_FRAME_PR].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[SH_DWARF_FRAME_PR].loc.offset \
= (long)&(sc_->sc_pr) - new_cfa_; \
(FS)->regs.reg[SH_DWARF_FRAME_SR].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[SH_DWARF_FRAME_SR].loc.offset \
= (long)&(sc_->sc_sr) - new_cfa_; \
(FS)->regs.reg[SH_DWARF_FRAME_GBR].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[SH_DWARF_FRAME_GBR].loc.offset \
= (long)&(sc_->sc_gbr) - new_cfa_; \
(FS)->regs.reg[SH_DWARF_FRAME_MACH].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[SH_DWARF_FRAME_MACH].loc.offset \
= (long)&(sc_->sc_mach) - new_cfa_; \
(FS)->regs.reg[SH_DWARF_FRAME_MACL].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[SH_DWARF_FRAME_MACL].loc.offset \
= (long)&(sc_->sc_macl) - new_cfa_; \
\
SH_FALLBACK_FRAME_FLOAT_STATE(sc_, (FS), new_cfa_); \
\
/* The unwinder expects the PC to point to the following insn, \
whereas the kernel returns the address of the actual \
faulting insn. */ \
sc_->sc_pc += 2; \
(FS)->regs.reg[SH_DWARF_FRAME_PC].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[SH_DWARF_FRAME_PC].loc.offset \
= (long)&(sc_->sc_pc) - new_cfa_; \
(FS)->retaddr_column = SH_DWARF_FRAME_PC; \
goto SUCCESS; \
} while (0)
#endif /* defined (__SH5__) */
#endif /* IN_LIBGCC2 */
/* For SH3 and SH4, we use a slot of the unwind frame which correspond
to a fake register number 16 as a placeholder for the return address
in MD_FALLBACK_FRAME_STATE_FOR and its content will be read with
_Unwind_GetGR which uses dwarf_reg_size_table to get the size of
the register. So the entry of dwarf_reg_size_table corresponding to
this slot must be set. To do this, we redefine DBX_REGISTER_NUMBER
so as to return itself for 16. */
#undef DBX_REGISTER_NUMBER
#define DBX_REGISTER_NUMBER(REGNO) \
((! TARGET_SH5 && (REGNO) == 16) ? 16 : SH_DBX_REGISTER_NUMBER (REGNO))
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