gcc/config/sh/linux.h - gcc - Git at Google

 /* Definitions for SH running Linux-based GNU systems using ELF
    Copyright (C) 1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
    Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp>

 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 2, 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 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

 /* ??? Current SH linux linker has a problem for DW_EH_PE_textrel.  */
 #undef ASM_PREFERRED_EH_DATA_FORMAT
 #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=linux"); \
   builtin_assert ("system=unix"); \
   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)  */	\
     /* Newer kernel uses pad instructions to avoid an SH-4 core bug.  */\
     /* mov.w 1f,r3; trapa #0x10; or r0,r0; or r0,r0; or r0,r0; or r0,r0;\
        or r0,r0; 1: .short 0x77  (sigreturn)  */			\
     /* mov.w 1f,r3; trapa #0x10; or r0,r0; or r0,r0; or r0,r0; or r0,r0;\
        or r0,r0; 1: .short 0xad  (rt_sigreturn)  */			\
     if (((*(unsigned short *) (pc_+0)  == 0x9300)			\
 	 && (*(unsigned short *) (pc_+2)  == 0xc310)			\
 	 && (*(unsigned short *) (pc_+4)  == 0x0077))			\
 	|| (((*(unsigned short *) (pc_+0)  == 0x9305)			\
 	    && (*(unsigned short *) (pc_+2)  == 0xc310)			\
 	    && (*(unsigned short *) (pc_+14)  == 0x0077))))		\
       sc_ = (CONTEXT)->cfa;						\
     else if (((*(unsigned short *) (pc_+0) == 0x9300)			\
 	      && (*(unsigned short *) (pc_+2)  == 0xc310)		\
 	      && (*(unsigned short *) (pc_+4)  == 0x00ad))		\
 	     || (((*(unsigned short *) (pc_+0) == 0x9305)		\
 		 && (*(unsigned short *) (pc_+2)  == 0xc310)		\
 		 && (*(unsigned short *) (pc_+14)  == 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))
	/* Definitions for SH running Linux-based GNU systems using ELF
	Copyright (C) 1999, 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
	Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp>

	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 2, 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 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

	/* ??? Current SH linux linker has a problem for DW_EH_PE_textrel. */
	#undef ASM_PREFERRED_EH_DATA_FORMAT
	#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=linux"); \
	builtin_assert ("system=unix"); \
	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) */ \
	/* Newer kernel uses pad instructions to avoid an SH-4 core bug. */\
	/* mov.w 1f,r3; trapa #0x10; or r0,r0; or r0,r0; or r0,r0; or r0,r0;\
	or r0,r0; 1: .short 0x77 (sigreturn) */ \
	/* mov.w 1f,r3; trapa #0x10; or r0,r0; or r0,r0; or r0,r0; or r0,r0;\
	or r0,r0; 1: .short 0xad (rt_sigreturn) */ \
	if ((((unsigned short ) (pc_+0) == 0x9300) \
	&& ((unsigned short ) (pc_+2) == 0xc310) \
	&& ((unsigned short ) (pc_+4) == 0x0077)) \
	\|\| ((((unsigned short ) (pc_+0) == 0x9305) \
	&& ((unsigned short ) (pc_+2) == 0xc310) \
	&& ((unsigned short ) (pc_+14) == 0x0077)))) \
	sc_ = (CONTEXT)->cfa; \
	else if ((((unsigned short ) (pc_+0) == 0x9300) \
	&& ((unsigned short ) (pc_+2) == 0xc310) \
	&& ((unsigned short ) (pc_+4) == 0x00ad)) \
	\|\| ((((unsigned short ) (pc_+0) == 0x9305) \
	&& ((unsigned short ) (pc_+2) == 0xc310) \
	&& ((unsigned short ) (pc_+14) == 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))