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binutils-gdb/gdb/sh64-tdep.c
Andrew Cagney 2f72f85088 2004-04-30 Andrew Cagney <cagney@redhat.com> 
* defs.h (deprecated_inside_entry_file): Delete declaration.
	* blockframe.c (deprecated_inside_entry_file): Delete function.
	(legacy_frame_chain_valid): Delete call.
	* sh64-tdep.c (sh64_frame_chain): Delete call.
	* objfiles.h: Update comments.
	* i386-interix-tdep.c (i386_interix_frame_chain_valid): Delete
	call.
	* frame.c (get_prev_frame): Delete call, update comments.
2004-04-30 20:44:59 +00:00

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/* Target-dependent code for Renesas Super-H, for GDB.
Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of GDB.
This program 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 of the License, or
(at your option) any later version.
This program 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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/*
Contributed by Steve Chamberlain
sac@cygnus.com
*/
#include "defs.h"
#include "frame.h"
#include "symtab.h"
#include "objfiles.h"
#include "gdbtypes.h"
#include "gdbcmd.h"
#include "gdbcore.h"
#include "value.h"
#include "dis-asm.h"
#include "inferior.h"
#include "gdb_string.h"
#include "arch-utils.h"
#include "floatformat.h"
#include "regcache.h"
#include "doublest.h"
#include "osabi.h"
#include "elf-bfd.h"
#include "solib-svr4.h"
/* sh flags */
#include "elf/sh.h"
/* registers numbers shared with the simulator */
#include "gdb/sim-sh.h"
/* Information that is dependent on the processor variant. */
enum sh_abi
{
SH_ABI_UNKNOWN,
SH_ABI_32,
SH_ABI_64
};
struct gdbarch_tdep
{
enum sh_abi sh_abi;
};
/* Registers of SH5 */
enum
{
R0_REGNUM = 0,
DEFAULT_RETURN_REGNUM = 2,
STRUCT_RETURN_REGNUM = 2,
ARG0_REGNUM = 2,
ARGLAST_REGNUM = 9,
FLOAT_ARGLAST_REGNUM = 11,
PR_REGNUM = 18,
SR_REGNUM = 65,
DR0_REGNUM = 141,
DR_LAST_REGNUM = 172,
/* FPP stands for Floating Point Pair, to avoid confusion with
GDB's FP0_REGNUM, which is the number of the first Floating
point register. Unfortunately on the sh5, the floating point
registers are called FR, and the floating point pairs are called FP. */
FPP0_REGNUM = 173,
FPP_LAST_REGNUM = 204,
FV0_REGNUM = 205,
FV_LAST_REGNUM = 220,
R0_C_REGNUM = 221,
R_LAST_C_REGNUM = 236,
PC_C_REGNUM = 237,
GBR_C_REGNUM = 238,
MACH_C_REGNUM = 239,
MACL_C_REGNUM = 240,
PR_C_REGNUM = 241,
T_C_REGNUM = 242,
FPSCR_C_REGNUM = 243,
FPUL_C_REGNUM = 244,
FP0_C_REGNUM = 245,
FP_LAST_C_REGNUM = 260,
DR0_C_REGNUM = 261,
DR_LAST_C_REGNUM = 268,
FV0_C_REGNUM = 269,
FV_LAST_C_REGNUM = 272,
FPSCR_REGNUM = SIM_SH64_FPCSR_REGNUM,
SSR_REGNUM = SIM_SH64_SSR_REGNUM,
SPC_REGNUM = SIM_SH64_SPC_REGNUM,
TR7_REGNUM = SIM_SH64_TR0_REGNUM + 7,
FP_LAST_REGNUM = SIM_SH64_FR0_REGNUM + SIM_SH64_NR_FP_REGS - 1
};
/* Define other aspects of the stack frame.
we keep a copy of the worked out return pc lying around, since it
is a useful bit of info */
struct frame_extra_info
{
CORE_ADDR return_pc;
int leaf_function;
int f_offset;
};
static const char *
sh64_register_name (int reg_nr)
{
static char *register_names[] =
{
/* SH MEDIA MODE (ISA 32) */
/* general registers (64-bit) 0-63 */
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
"r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39",
"r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47",
"r48", "r49", "r50", "r51", "r52", "r53", "r54", "r55",
"r56", "r57", "r58", "r59", "r60", "r61", "r62", "r63",
/* pc (64-bit) 64 */
"pc",
/* status reg., saved status reg., saved pc reg. (64-bit) 65-67 */
"sr", "ssr", "spc",
/* target registers (64-bit) 68-75*/
"tr0", "tr1", "tr2", "tr3", "tr4", "tr5", "tr6", "tr7",
/* floating point state control register (32-bit) 76 */
"fpscr",
/* single precision floating point registers (32-bit) 77-140*/
"fr0", "fr1", "fr2", "fr3", "fr4", "fr5", "fr6", "fr7",
"fr8", "fr9", "fr10", "fr11", "fr12", "fr13", "fr14", "fr15",
"fr16", "fr17", "fr18", "fr19", "fr20", "fr21", "fr22", "fr23",
"fr24", "fr25", "fr26", "fr27", "fr28", "fr29", "fr30", "fr31",
"fr32", "fr33", "fr34", "fr35", "fr36", "fr37", "fr38", "fr39",
"fr40", "fr41", "fr42", "fr43", "fr44", "fr45", "fr46", "fr47",
"fr48", "fr49", "fr50", "fr51", "fr52", "fr53", "fr54", "fr55",
"fr56", "fr57", "fr58", "fr59", "fr60", "fr61", "fr62", "fr63",
/* double precision registers (pseudo) 141-172 */
"dr0", "dr2", "dr4", "dr6", "dr8", "dr10", "dr12", "dr14",
"dr16", "dr18", "dr20", "dr22", "dr24", "dr26", "dr28", "dr30",
"dr32", "dr34", "dr36", "dr38", "dr40", "dr42", "dr44", "dr46",
"dr48", "dr50", "dr52", "dr54", "dr56", "dr58", "dr60", "dr62",
/* floating point pairs (pseudo) 173-204*/
"fp0", "fp2", "fp4", "fp6", "fp8", "fp10", "fp12", "fp14",
"fp16", "fp18", "fp20", "fp22", "fp24", "fp26", "fp28", "fp30",
"fp32", "fp34", "fp36", "fp38", "fp40", "fp42", "fp44", "fp46",
"fp48", "fp50", "fp52", "fp54", "fp56", "fp58", "fp60", "fp62",
/* floating point vectors (4 floating point regs) (pseudo) 205-220*/
"fv0", "fv4", "fv8", "fv12", "fv16", "fv20", "fv24", "fv28",
"fv32", "fv36", "fv40", "fv44", "fv48", "fv52", "fv56", "fv60",
/* SH COMPACT MODE (ISA 16) (all pseudo) 221-272*/
"r0_c", "r1_c", "r2_c", "r3_c", "r4_c", "r5_c", "r6_c", "r7_c",
"r8_c", "r9_c", "r10_c", "r11_c", "r12_c", "r13_c", "r14_c", "r15_c",
"pc_c",
"gbr_c", "mach_c", "macl_c", "pr_c", "t_c",
"fpscr_c", "fpul_c",
"fr0_c", "fr1_c", "fr2_c", "fr3_c", "fr4_c", "fr5_c", "fr6_c", "fr7_c",
"fr8_c", "fr9_c", "fr10_c", "fr11_c", "fr12_c", "fr13_c", "fr14_c", "fr15_c",
"dr0_c", "dr2_c", "dr4_c", "dr6_c", "dr8_c", "dr10_c", "dr12_c", "dr14_c",
"fv0_c", "fv4_c", "fv8_c", "fv12_c",
/* FIXME!!!! XF0 XF15, XD0 XD14 ?????*/
};
if (reg_nr < 0)
return NULL;
if (reg_nr >= (sizeof (register_names) / sizeof (*register_names)))
return NULL;
return register_names[reg_nr];
}
#define NUM_PSEUDO_REGS_SH_MEDIA 80
#define NUM_PSEUDO_REGS_SH_COMPACT 51
/* Macros and functions for setting and testing a bit in a minimal
symbol that marks it as 32-bit function. The MSB of the minimal
symbol's "info" field is used for this purpose.
ELF_MAKE_MSYMBOL_SPECIAL
tests whether an ELF symbol is "special", i.e. refers
to a 32-bit function, and sets a "special" bit in a
minimal symbol to mark it as a 32-bit function
MSYMBOL_IS_SPECIAL tests the "special" bit in a minimal symbol */
#define MSYMBOL_IS_SPECIAL(msym) \
(((long) MSYMBOL_INFO (msym) & 0x80000000) != 0)
static void
sh64_elf_make_msymbol_special (asymbol *sym, struct minimal_symbol *msym)
{
if (msym == NULL)
return;
if (((elf_symbol_type *)(sym))->internal_elf_sym.st_other == STO_SH5_ISA32)
{
MSYMBOL_INFO (msym) = (char *) (((long) MSYMBOL_INFO (msym)) | 0x80000000);
SYMBOL_VALUE_ADDRESS (msym) |= 1;
}
}
/* ISA32 (shmedia) function addresses are odd (bit 0 is set). Here
are some macros to test, set, or clear bit 0 of addresses. */
#define IS_ISA32_ADDR(addr) ((addr) & 1)
#define MAKE_ISA32_ADDR(addr) ((addr) | 1)
#define UNMAKE_ISA32_ADDR(addr) ((addr) & ~1)
static int
pc_is_isa32 (bfd_vma memaddr)
{
struct minimal_symbol *sym;
/* If bit 0 of the address is set, assume this is a
ISA32 (shmedia) address. */
if (IS_ISA32_ADDR (memaddr))
return 1;
/* A flag indicating that this is a ISA32 function is stored by elfread.c in
the high bit of the info field. Use this to decide if the function is
ISA16 or ISA32. */
sym = lookup_minimal_symbol_by_pc (memaddr);
if (sym)
return MSYMBOL_IS_SPECIAL (sym);
else
return 0;
}
static const unsigned char *
sh64_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenptr)
{
/* The BRK instruction for shmedia is
01101111 11110101 11111111 11110000
which translates in big endian mode to 0x6f, 0xf5, 0xff, 0xf0
and in little endian mode to 0xf0, 0xff, 0xf5, 0x6f */
/* The BRK instruction for shcompact is
00000000 00111011
which translates in big endian mode to 0x0, 0x3b
and in little endian mode to 0x3b, 0x0*/
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
{
if (pc_is_isa32 (*pcptr))
{
static unsigned char big_breakpoint_media[] = {0x6f, 0xf5, 0xff, 0xf0};
*pcptr = UNMAKE_ISA32_ADDR (*pcptr);
*lenptr = sizeof (big_breakpoint_media);
return big_breakpoint_media;
}
else
{
static unsigned char big_breakpoint_compact[] = {0x0, 0x3b};
*lenptr = sizeof (big_breakpoint_compact);
return big_breakpoint_compact;
}
}
else
{
if (pc_is_isa32 (*pcptr))
{
static unsigned char little_breakpoint_media[] = {0xf0, 0xff, 0xf5, 0x6f};
*pcptr = UNMAKE_ISA32_ADDR (*pcptr);
*lenptr = sizeof (little_breakpoint_media);
return little_breakpoint_media;
}
else
{
static unsigned char little_breakpoint_compact[] = {0x3b, 0x0};
*lenptr = sizeof (little_breakpoint_compact);
return little_breakpoint_compact;
}
}
}
/* Prologue looks like
[mov.l <regs>,@-r15]...
[sts.l pr,@-r15]
[mov.l r14,@-r15]
[mov r15,r14]
Actually it can be more complicated than this. For instance, with
newer gcc's:
mov.l r14,@-r15
add #-12,r15
mov r15,r14
mov r4,r1
mov r5,r2
mov.l r6,@(4,r14)
mov.l r7,@(8,r14)
mov.b r1,@r14
mov r14,r1
mov r14,r1
add #2,r1
mov.w r2,@r1
*/
/* PTABS/L Rn, TRa 0110101111110001nnnnnnl00aaa0000
with l=1 and n = 18 0110101111110001010010100aaa0000 */
#define IS_PTABSL_R18(x) (((x) & 0xffffff8f) == 0x6bf14a00)
/* STS.L PR,@-r0 0100000000100010
r0-4-->r0, PR-->(r0) */
#define IS_STS_R0(x) ((x) == 0x4022)
/* STS PR, Rm 0000mmmm00101010
PR-->Rm */
#define IS_STS_PR(x) (((x) & 0xf0ff) == 0x2a)
/* MOV.L Rm,@(disp,r15) 00011111mmmmdddd
Rm-->(dispx4+r15) */
#define IS_MOV_TO_R15(x) (((x) & 0xff00) == 0x1f00)
/* MOV.L R14,@(disp,r15) 000111111110dddd
R14-->(dispx4+r15) */
#define IS_MOV_R14(x) (((x) & 0xfff0) == 0x1fe0)
/* ST.Q R14, disp, R18 101011001110dddddddddd0100100000
R18-->(dispx8+R14) */
#define IS_STQ_R18_R14(x) (((x) & 0xfff003ff) == 0xace00120)
/* ST.Q R15, disp, R18 101011001111dddddddddd0100100000
R18-->(dispx8+R15) */
#define IS_STQ_R18_R15(x) (((x) & 0xfff003ff) == 0xacf00120)
/* ST.L R15, disp, R18 101010001111dddddddddd0100100000
R18-->(dispx4+R15) */
#define IS_STL_R18_R15(x) (((x) & 0xfff003ff) == 0xa8f00120)
/* ST.Q R15, disp, R14 1010 1100 1111 dddd dddd dd00 1110 0000
R14-->(dispx8+R15) */
#define IS_STQ_R14_R15(x) (((x) & 0xfff003ff) == 0xacf000e0)
/* ST.L R15, disp, R14 1010 1000 1111 dddd dddd dd00 1110 0000
R14-->(dispx4+R15) */
#define IS_STL_R14_R15(x) (((x) & 0xfff003ff) == 0xa8f000e0)
/* ADDI.L R15,imm,R15 1101 0100 1111 ssss ssss ss00 1111 0000
R15 + imm --> R15 */
#define IS_ADDIL_SP_MEDIA(x) (((x) & 0xfff003ff) == 0xd4f000f0)
/* ADDI R15,imm,R15 1101 0000 1111 ssss ssss ss00 1111 0000
R15 + imm --> R15 */
#define IS_ADDI_SP_MEDIA(x) (((x) & 0xfff003ff) == 0xd0f000f0)
/* ADD.L R15,R63,R14 0000 0000 1111 1000 1111 1100 1110 0000
R15 + R63 --> R14 */
#define IS_ADDL_SP_FP_MEDIA(x) ((x) == 0x00f8fce0)
/* ADD R15,R63,R14 0000 0000 1111 1001 1111 1100 1110 0000
R15 + R63 --> R14 */
#define IS_ADD_SP_FP_MEDIA(x) ((x) == 0x00f9fce0)
#define IS_MOV_SP_FP_MEDIA(x) (IS_ADDL_SP_FP_MEDIA(x) || IS_ADD_SP_FP_MEDIA(x))
/* MOV #imm, R0 1110 0000 ssss ssss
#imm-->R0 */
#define IS_MOV_R0(x) (((x) & 0xff00) == 0xe000)
/* MOV.L @(disp,PC), R0 1101 0000 iiii iiii */
#define IS_MOVL_R0(x) (((x) & 0xff00) == 0xd000)
/* ADD r15,r0 0011 0000 1111 1100
r15+r0-->r0 */
#define IS_ADD_SP_R0(x) ((x) == 0x30fc)
/* MOV.L R14 @-R0 0010 0000 1110 0110
R14-->(R0-4), R0-4-->R0 */
#define IS_MOV_R14_R0(x) ((x) == 0x20e6)
/* ADD Rm,R63,Rn Rm+R63-->Rn 0000 00mm mmmm 1001 1111 11nn nnnn 0000
where Rm is one of r2-r9 which are the argument registers. */
/* FIXME: Recognize the float and double register moves too! */
#define IS_MEDIA_IND_ARG_MOV(x) \
((((x) & 0xfc0ffc0f) == 0x0009fc00) && (((x) & 0x03f00000) >= 0x00200000 && ((x) & 0x03f00000) <= 0x00900000))
/* ST.Q Rn,0,Rm Rm-->Rn+0 1010 11nn nnnn 0000 0000 00mm mmmm 0000
or ST.L Rn,0,Rm Rm-->Rn+0 1010 10nn nnnn 0000 0000 00mm mmmm 0000
where Rm is one of r2-r9 which are the argument registers. */
#define IS_MEDIA_ARG_MOV(x) \
(((((x) & 0xfc0ffc0f) == 0xac000000) || (((x) & 0xfc0ffc0f) == 0xa8000000)) \
&& (((x) & 0x000003f0) >= 0x00000020 && ((x) & 0x000003f0) <= 0x00000090))
/* ST.B R14,0,Rn Rn-->(R14+0) 1010 0000 1110 0000 0000 00nn nnnn 0000*/
/* ST.W R14,0,Rn Rn-->(R14+0) 1010 0100 1110 0000 0000 00nn nnnn 0000*/
/* ST.L R14,0,Rn Rn-->(R14+0) 1010 1000 1110 0000 0000 00nn nnnn 0000*/
/* FST.S R14,0,FRn Rn-->(R14+0) 1011 0100 1110 0000 0000 00nn nnnn 0000*/
/* FST.D R14,0,DRn Rn-->(R14+0) 1011 1100 1110 0000 0000 00nn nnnn 0000*/
#define IS_MEDIA_MOV_TO_R14(x) \
((((x) & 0xfffffc0f) == 0xa0e00000) \
|| (((x) & 0xfffffc0f) == 0xa4e00000) \
|| (((x) & 0xfffffc0f) == 0xa8e00000) \
|| (((x) & 0xfffffc0f) == 0xb4e00000) \
|| (((x) & 0xfffffc0f) == 0xbce00000))
/* MOV Rm, Rn Rm-->Rn 0110 nnnn mmmm 0011
where Rm is r2-r9 */
#define IS_COMPACT_IND_ARG_MOV(x) \
((((x) & 0xf00f) == 0x6003) && (((x) & 0x00f0) >= 0x0020) && (((x) & 0x00f0) <= 0x0090))
/* compact direct arg move!
MOV.L Rn, @r14 0010 1110 mmmm 0010 */
#define IS_COMPACT_ARG_MOV(x) \
(((((x) & 0xff0f) == 0x2e02) && (((x) & 0x00f0) >= 0x0020) && ((x) & 0x00f0) <= 0x0090))
/* MOV.B Rm, @R14 0010 1110 mmmm 0000
MOV.W Rm, @R14 0010 1110 mmmm 0001 */
#define IS_COMPACT_MOV_TO_R14(x) \
((((x) & 0xff0f) == 0x2e00) || (((x) & 0xff0f) == 0x2e01))
#define IS_JSR_R0(x) ((x) == 0x400b)
#define IS_NOP(x) ((x) == 0x0009)
/* MOV r15,r14 0110111011110011
r15-->r14 */
#define IS_MOV_SP_FP(x) ((x) == 0x6ef3)
/* ADD #imm,r15 01111111iiiiiiii
r15+imm-->r15 */
#define IS_ADD_SP(x) (((x) & 0xff00) == 0x7f00)
/* Skip any prologue before the guts of a function */
/* Skip the prologue using the debug information. If this fails we'll
fall back on the 'guess' method below. */
static CORE_ADDR
after_prologue (CORE_ADDR pc)
{
struct symtab_and_line sal;
CORE_ADDR func_addr, func_end;
/* If we can not find the symbol in the partial symbol table, then
there is no hope we can determine the function's start address
with this code. */
if (!find_pc_partial_function (pc, NULL, &func_addr, &func_end))
return 0;
/* Get the line associated with FUNC_ADDR. */
sal = find_pc_line (func_addr, 0);
/* There are only two cases to consider. First, the end of the source line
is within the function bounds. In that case we return the end of the
source line. Second is the end of the source line extends beyond the
bounds of the current function. We need to use the slow code to
examine instructions in that case. */
if (sal.end < func_end)
return sal.end;
else
return 0;
}
static CORE_ADDR
look_for_args_moves (CORE_ADDR start_pc, int media_mode)
{
CORE_ADDR here, end;
int w;
int insn_size = (media_mode ? 4 : 2);
for (here = start_pc, end = start_pc + (insn_size * 28); here < end;)
{
if (media_mode)
{
w = read_memory_integer (UNMAKE_ISA32_ADDR (here), insn_size);
here += insn_size;
if (IS_MEDIA_IND_ARG_MOV (w))
{
/* This must be followed by a store to r14, so the argument
is where the debug info says it is. This can happen after
the SP has been saved, unfortunately. */
int next_insn = read_memory_integer (UNMAKE_ISA32_ADDR (here),
insn_size);
here += insn_size;
if (IS_MEDIA_MOV_TO_R14 (next_insn))
start_pc = here;
}
else if (IS_MEDIA_ARG_MOV (w))
{
/* These instructions store directly the argument in r14. */
start_pc = here;
}
else
break;
}
else
{
w = read_memory_integer (here, insn_size);
w = w & 0xffff;
here += insn_size;
if (IS_COMPACT_IND_ARG_MOV (w))
{
/* This must be followed by a store to r14, so the argument
is where the debug info says it is. This can happen after
the SP has been saved, unfortunately. */
int next_insn = 0xffff & read_memory_integer (here, insn_size);
here += insn_size;
if (IS_COMPACT_MOV_TO_R14 (next_insn))
start_pc = here;
}
else if (IS_COMPACT_ARG_MOV (w))
{
/* These instructions store directly the argument in r14. */
start_pc = here;
}
else if (IS_MOVL_R0 (w))
{
/* There is a function that gcc calls to get the arguments
passed correctly to the function. Only after this
function call the arguments will be found at the place
where they are supposed to be. This happens in case the
argument has to be stored into a 64-bit register (for
instance doubles, long longs). SHcompact doesn't have
access to the full 64-bits, so we store the register in
stack slot and store the address of the stack slot in
the register, then do a call through a wrapper that
loads the memory value into the register. A SHcompact
callee calls an argument decoder
(GCC_shcompact_incoming_args) that stores the 64-bit
value in a stack slot and stores the address of the
stack slot in the register. GCC thinks the argument is
just passed by transparent reference, but this is only
true after the argument decoder is called. Such a call
needs to be considered part of the prologue. */
/* This must be followed by a JSR @r0 instruction and by
a NOP instruction. After these, the prologue is over! */
int next_insn = 0xffff & read_memory_integer (here, insn_size);
here += insn_size;
if (IS_JSR_R0 (next_insn))
{
next_insn = 0xffff & read_memory_integer (here, insn_size);
here += insn_size;
if (IS_NOP (next_insn))
start_pc = here;
}
}
else
break;
}
}
return start_pc;
}
static CORE_ADDR
sh64_skip_prologue_hard_way (CORE_ADDR start_pc)
{
CORE_ADDR here, end;
int updated_fp = 0;
int insn_size = 4;
int media_mode = 1;
if (!start_pc)
return 0;
if (pc_is_isa32 (start_pc) == 0)
{
insn_size = 2;
media_mode = 0;
}
for (here = start_pc, end = start_pc + (insn_size * 28); here < end;)
{
if (media_mode)
{
int w = read_memory_integer (UNMAKE_ISA32_ADDR (here), insn_size);
here += insn_size;
if (IS_STQ_R18_R14 (w) || IS_STQ_R18_R15 (w) || IS_STQ_R14_R15 (w)
|| IS_STL_R14_R15 (w) || IS_STL_R18_R15 (w)
|| IS_ADDIL_SP_MEDIA (w) || IS_ADDI_SP_MEDIA (w) || IS_PTABSL_R18 (w))
{
start_pc = here;
}
else if (IS_MOV_SP_FP (w) || IS_MOV_SP_FP_MEDIA(w))
{
start_pc = here;
updated_fp = 1;
}
else
if (updated_fp)
{
/* Don't bail out yet, we may have arguments stored in
registers here, according to the debug info, so that
gdb can print the frames correctly. */
start_pc = look_for_args_moves (here - insn_size, media_mode);
break;
}
}
else
{
int w = 0xffff & read_memory_integer (here, insn_size);
here += insn_size;
if (IS_STS_R0 (w) || IS_STS_PR (w)
|| IS_MOV_TO_R15 (w) || IS_MOV_R14 (w)
|| IS_MOV_R0 (w) || IS_ADD_SP_R0 (w) || IS_MOV_R14_R0 (w))
{
start_pc = here;
}
else if (IS_MOV_SP_FP (w))
{
start_pc = here;
updated_fp = 1;
}
else
if (updated_fp)
{
/* Don't bail out yet, we may have arguments stored in
registers here, according to the debug info, so that
gdb can print the frames correctly. */
start_pc = look_for_args_moves (here - insn_size, media_mode);
break;
}
}
}
return start_pc;
}
static CORE_ADDR
sh_skip_prologue (CORE_ADDR pc)
{
CORE_ADDR post_prologue_pc;
/* See if we can determine the end of the prologue via the symbol table.
If so, then return either PC, or the PC after the prologue, whichever
is greater. */
post_prologue_pc = after_prologue (pc);
/* If after_prologue returned a useful address, then use it. Else
fall back on the instruction skipping code. */
if (post_prologue_pc != 0)
return max (pc, post_prologue_pc);
else
return sh64_skip_prologue_hard_way (pc);
}
/* Immediately after a function call, return the saved pc.
Can't always go through the frames for this because on some machines
the new frame is not set up until the new function executes
some instructions.
The return address is the value saved in the PR register + 4 */
static CORE_ADDR
sh_saved_pc_after_call (struct frame_info *frame)
{
return (ADDR_BITS_REMOVE (read_register (PR_REGNUM)));
}
/* Should call_function allocate stack space for a struct return? */
static int
sh64_use_struct_convention (int gcc_p, struct type *type)
{
return (TYPE_LENGTH (type) > 8);
}
/* Store the address of the place in which to copy the structure the
subroutine will return. This is called from call_function.
We store structs through a pointer passed in R2 */
static void
sh64_store_struct_return (CORE_ADDR addr, CORE_ADDR sp)
{
write_register (STRUCT_RETURN_REGNUM, (addr));
}
/* Disassemble an instruction. */
static int
gdb_print_insn_sh (bfd_vma memaddr, disassemble_info *info)
{
info->endian = TARGET_BYTE_ORDER;
return print_insn_sh (memaddr, info);
}
/* Given a register number RN as it appears in an assembly
instruction, find the corresponding register number in the GDB
scheme. */
static int
translate_insn_rn (int rn, int media_mode)
{
/* FIXME: this assumes that the number rn is for a not pseudo
register only. */
if (media_mode)
return rn;
else
{
/* These registers don't have a corresponding compact one. */
/* FIXME: This is probably not enough. */
#if 0
if ((rn >= 16 && rn <= 63) || (rn >= 93 && rn <= 140))
return rn;
#endif
if (rn >= 0 && rn <= R0_C_REGNUM)
return R0_C_REGNUM + rn;
else
return rn;
}
}
/* Given a GDB frame, determine the address of the calling function's
frame. This will be used to create a new GDB frame struct, and
then DEPRECATED_INIT_EXTRA_FRAME_INFO and DEPRECATED_INIT_FRAME_PC
will be called for the new frame.
For us, the frame address is its stack pointer value, so we look up
the function prologue to determine the caller's sp value, and return it. */
static CORE_ADDR
sh64_frame_chain (struct frame_info *frame)
{
if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame),
get_frame_base (frame),
get_frame_base (frame)))
return get_frame_base (frame); /* dummy frame same as caller's frame */
if (get_frame_pc (frame))
{
int media_mode = pc_is_isa32 (get_frame_pc (frame));
int size;
if (gdbarch_tdep (current_gdbarch)->sh_abi == SH_ABI_32)
size = 4;
else
size = register_size (current_gdbarch,
translate_insn_rn (DEPRECATED_FP_REGNUM,
media_mode));
return read_memory_integer (get_frame_base (frame)
+ get_frame_extra_info (frame)->f_offset,
size);
}
else
return 0;
}
static CORE_ADDR
sh64_get_saved_pr (struct frame_info *fi, int pr_regnum)
{
int media_mode = 0;
for (; fi; fi = get_next_frame (fi))
if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi),
get_frame_base (fi)))
/* When the caller requests PR from the dummy frame, we return
PC because that's where the previous routine appears to have
done a call from. */
return deprecated_read_register_dummy (get_frame_pc (fi),
get_frame_base (fi), pr_regnum);
else
{
DEPRECATED_FRAME_INIT_SAVED_REGS (fi);
if (!get_frame_pc (fi))
return 0;
media_mode = pc_is_isa32 (get_frame_pc (fi));
if (deprecated_get_frame_saved_regs (fi)[pr_regnum] != 0)
{
int gdb_reg_num = translate_insn_rn (pr_regnum, media_mode);
int size = ((gdbarch_tdep (current_gdbarch)->sh_abi == SH_ABI_32)
? 4
: register_size (current_gdbarch, gdb_reg_num));
return read_memory_integer (deprecated_get_frame_saved_regs (fi)[pr_regnum], size);
}
}
return read_register (pr_regnum);
}
/* For vectors of 4 floating point registers. */
static int
fv_reg_base_num (int fv_regnum)
{
int fp_regnum;
fp_regnum = FP0_REGNUM +
(fv_regnum - FV0_REGNUM) * 4;
return fp_regnum;
}
/* For double precision floating point registers, i.e 2 fp regs.*/
static int
dr_reg_base_num (int dr_regnum)
{
int fp_regnum;
fp_regnum = FP0_REGNUM +
(dr_regnum - DR0_REGNUM) * 2;
return fp_regnum;
}
/* For pairs of floating point registers */
static int
fpp_reg_base_num (int fpp_regnum)
{
int fp_regnum;
fp_regnum = FP0_REGNUM +
(fpp_regnum - FPP0_REGNUM) * 2;
return fp_regnum;
}
static int
is_media_pseudo (int rn)
{
return (rn >= DR0_REGNUM && rn <= FV_LAST_REGNUM);
}
static int
sh64_media_reg_base_num (int reg_nr)
{
int base_regnum = -1;
if (reg_nr >= DR0_REGNUM
&& reg_nr <= DR_LAST_REGNUM)
base_regnum = dr_reg_base_num (reg_nr);
else if (reg_nr >= FPP0_REGNUM
&& reg_nr <= FPP_LAST_REGNUM)
base_regnum = fpp_reg_base_num (reg_nr);
else if (reg_nr >= FV0_REGNUM
&& reg_nr <= FV_LAST_REGNUM)
base_regnum = fv_reg_base_num (reg_nr);
return base_regnum;
}
/* *INDENT-OFF* */
/*
SH COMPACT MODE (ISA 16) (all pseudo) 221-272
GDB_REGNUM BASE_REGNUM
r0_c 221 0
r1_c 222 1
r2_c 223 2
r3_c 224 3
r4_c 225 4
r5_c 226 5
r6_c 227 6
r7_c 228 7
r8_c 229 8
r9_c 230 9
r10_c 231 10
r11_c 232 11
r12_c 233 12
r13_c 234 13
r14_c 235 14
r15_c 236 15
pc_c 237 64
gbr_c 238 16
mach_c 239 17
macl_c 240 17
pr_c 241 18
t_c 242 19
fpscr_c 243 76
fpul_c 244 109
fr0_c 245 77
fr1_c 246 78
fr2_c 247 79
fr3_c 248 80
fr4_c 249 81
fr5_c 250 82
fr6_c 251 83
fr7_c 252 84
fr8_c 253 85
fr9_c 254 86
fr10_c 255 87
fr11_c 256 88
fr12_c 257 89
fr13_c 258 90
fr14_c 259 91
fr15_c 260 92
dr0_c 261 77
dr2_c 262 79
dr4_c 263 81
dr6_c 264 83
dr8_c 265 85
dr10_c 266 87
dr12_c 267 89
dr14_c 268 91
fv0_c 269 77
fv4_c 270 81
fv8_c 271 85
fv12_c 272 91
*/
/* *INDENT-ON* */
static int
sh64_compact_reg_base_num (int reg_nr)
{
int base_regnum = -1;
/* general register N maps to general register N */
if (reg_nr >= R0_C_REGNUM
&& reg_nr <= R_LAST_C_REGNUM)
base_regnum = reg_nr - R0_C_REGNUM;
/* floating point register N maps to floating point register N */
else if (reg_nr >= FP0_C_REGNUM
&& reg_nr <= FP_LAST_C_REGNUM)
base_regnum = reg_nr - FP0_C_REGNUM + FP0_REGNUM;
/* double prec register N maps to base regnum for double prec register N */
else if (reg_nr >= DR0_C_REGNUM
&& reg_nr <= DR_LAST_C_REGNUM)
base_regnum = dr_reg_base_num (DR0_REGNUM
+ reg_nr - DR0_C_REGNUM);
/* vector N maps to base regnum for vector register N */
else if (reg_nr >= FV0_C_REGNUM
&& reg_nr <= FV_LAST_C_REGNUM)
base_regnum = fv_reg_base_num (FV0_REGNUM
+ reg_nr - FV0_C_REGNUM);
else if (reg_nr == PC_C_REGNUM)
base_regnum = PC_REGNUM;
else if (reg_nr == GBR_C_REGNUM)
base_regnum = 16;
else if (reg_nr == MACH_C_REGNUM
|| reg_nr == MACL_C_REGNUM)
base_regnum = 17;
else if (reg_nr == PR_C_REGNUM)
base_regnum = 18;
else if (reg_nr == T_C_REGNUM)
base_regnum = 19;
else if (reg_nr == FPSCR_C_REGNUM)
base_regnum = FPSCR_REGNUM; /*???? this register is a mess. */
else if (reg_nr == FPUL_C_REGNUM)
base_regnum = FP0_REGNUM + 32;
return base_regnum;
}
/* Given a register number RN (according to the gdb scheme) , return
its corresponding architectural register. In media mode, only a
subset of the registers is pseudo registers. For compact mode, all
the registers are pseudo. */
static int
translate_rn_to_arch_reg_num (int rn, int media_mode)
{
if (media_mode)
{
if (!is_media_pseudo (rn))
return rn;
else
return sh64_media_reg_base_num (rn);
}
else
/* All compact registers are pseudo. */
return sh64_compact_reg_base_num (rn);
}
static int
sign_extend (int value, int bits)
{
value = value & ((1 << bits) - 1);
return (value & (1 << (bits - 1))
? value | (~((1 << bits) - 1))
: value);
}
static void
sh64_nofp_frame_init_saved_regs (struct frame_info *fi)
{
int *where = (int *) alloca ((NUM_REGS + NUM_PSEUDO_REGS) * sizeof (int));
int rn;
int have_fp = 0;
int fp_regnum;
int sp_regnum;
int depth;
int pc;
int opc;
int insn;
int r0_val = 0;
int media_mode = 0;
int insn_size;
int gdb_register_number;
int register_number;
char *dummy_regs = deprecated_generic_find_dummy_frame (get_frame_pc (fi),
get_frame_base (fi));
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
if (deprecated_get_frame_saved_regs (fi) == NULL)
frame_saved_regs_zalloc (fi);
else
memset (deprecated_get_frame_saved_regs (fi), 0, SIZEOF_FRAME_SAVED_REGS);
if (dummy_regs)
{
/* DANGER! This is ONLY going to work if the char buffer format of
the saved registers is byte-for-byte identical to the
CORE_ADDR regs[NUM_REGS] format used by struct frame_saved_regs! */
memcpy (deprecated_get_frame_saved_regs (fi), dummy_regs, SIZEOF_FRAME_SAVED_REGS);
return;
}
get_frame_extra_info (fi)->leaf_function = 1;
get_frame_extra_info (fi)->f_offset = 0;
for (rn = 0; rn < NUM_REGS + NUM_PSEUDO_REGS; rn++)
where[rn] = -1;
depth = 0;
/* Loop around examining the prologue insns until we find something
that does not appear to be part of the prologue. But give up
after 20 of them, since we're getting silly then. */
pc = get_frame_func (fi);
if (!pc)
{
deprecated_update_frame_pc_hack (fi, 0);
return;
}
if (pc_is_isa32 (pc))
{
media_mode = 1;
insn_size = 4;
}
else
{
media_mode = 0;
insn_size = 2;
}
/* The frame pointer register is general register 14 in shmedia and
shcompact modes. In sh compact it is a pseudo register. Same goes
for the stack pointer register, which is register 15. */
fp_regnum = translate_insn_rn (DEPRECATED_FP_REGNUM, media_mode);
sp_regnum = translate_insn_rn (SP_REGNUM, media_mode);
for (opc = pc + (insn_size * 28); pc < opc; pc += insn_size)
{
insn = read_memory_integer (media_mode ? UNMAKE_ISA32_ADDR (pc) : pc,
insn_size);
if (media_mode == 0)
{
if (IS_STS_PR (insn))
{
int next_insn = read_memory_integer (pc + insn_size, insn_size);
if (IS_MOV_TO_R15 (next_insn))
{
int reg_nr = PR_C_REGNUM;
where[reg_nr] = depth - ((((next_insn & 0xf) ^ 0x8) - 0x8) << 2);
get_frame_extra_info (fi)->leaf_function = 0;
pc += insn_size;
}
}
else if (IS_MOV_R14 (insn))
{
where[fp_regnum] = depth - ((((insn & 0xf) ^ 0x8) - 0x8) << 2);
}
else if (IS_MOV_R0 (insn))
{
/* Put in R0 the offset from SP at which to store some
registers. We are interested in this value, because it
will tell us where the given registers are stored within
the frame. */
r0_val = ((insn & 0xff) ^ 0x80) - 0x80;
}
else if (IS_ADD_SP_R0 (insn))
{
/* This instruction still prepares r0, but we don't care.
We already have the offset in r0_val. */
}
else if (IS_STS_R0 (insn))
{
/* Store PR at r0_val-4 from SP. Decrement r0 by 4*/
int reg_nr = PR_C_REGNUM;
where[reg_nr] = depth - (r0_val - 4);
r0_val -= 4;
get_frame_extra_info (fi)->leaf_function = 0;
}
else if (IS_MOV_R14_R0 (insn))
{
/* Store R14 at r0_val-4 from SP. Decrement r0 by 4 */
where[fp_regnum] = depth - (r0_val - 4);
r0_val -= 4;
}
else if (IS_ADD_SP (insn))
{
depth -= ((insn & 0xff) ^ 0x80) - 0x80;
}
else if (IS_MOV_SP_FP (insn))
break;
}
else
{
if (IS_ADDIL_SP_MEDIA (insn)
|| IS_ADDI_SP_MEDIA (insn))
{
depth -= sign_extend ((((insn & 0xffc00) ^ 0x80000) - 0x80000) >> 10, 9);
}
else if (IS_STQ_R18_R15 (insn))
{
where[PR_REGNUM] =
depth - (sign_extend ((insn & 0xffc00) >> 10, 9) << 3);
get_frame_extra_info (fi)->leaf_function = 0;
}
else if (IS_STL_R18_R15 (insn))
{
where[PR_REGNUM] =
depth - (sign_extend ((insn & 0xffc00) >> 10, 9) << 2);
get_frame_extra_info (fi)->leaf_function = 0;
}
else if (IS_STQ_R14_R15 (insn))
{
where[fp_regnum] = depth - (sign_extend ((insn & 0xffc00) >> 10, 9) << 3);
}
else if (IS_STL_R14_R15 (insn))
{
where[fp_regnum] = depth - (sign_extend ((insn & 0xffc00) >> 10, 9) << 2);
}
else if (IS_MOV_SP_FP_MEDIA (insn))
break;
}
}
/* Now we know how deep things are, we can work out their addresses. */
for (rn = 0; rn < NUM_REGS + NUM_PSEUDO_REGS; rn++)
{
register_number = translate_rn_to_arch_reg_num (rn, media_mode);
if (where[rn] >= 0)
{
if (rn == fp_regnum)
have_fp = 1;
/* Watch out! saved_regs is only for the real registers, and
doesn't include space for the pseudo registers. */
deprecated_get_frame_saved_regs (fi)[register_number]
= get_frame_base (fi) - where[rn] + depth;
}
else
deprecated_get_frame_saved_regs (fi)[register_number] = 0;
}
if (have_fp)
{
/* SP_REGNUM is 15. For shmedia 15 is the real register. For
shcompact 15 is the arch register corresponding to the pseudo
register r15 which still is the SP register. */
/* The place on the stack where fp is stored contains the sp of
the caller. */
/* Again, saved_registers contains only space for the real
registers, so we store in DEPRECATED_FP_REGNUM position. */
int size;
if (tdep->sh_abi == SH_ABI_32)
size = 4;
else
size = register_size (current_gdbarch, fp_regnum);
deprecated_get_frame_saved_regs (fi)[sp_regnum]
= read_memory_integer (deprecated_get_frame_saved_regs (fi)[fp_regnum],
size);
}
else
deprecated_get_frame_saved_regs (fi)[sp_regnum] = get_frame_base (fi);
get_frame_extra_info (fi)->f_offset = depth - where[fp_regnum];
}
/* Initialize the extra info saved in a FRAME */
static void
sh64_init_extra_frame_info (int fromleaf, struct frame_info *fi)
{
int media_mode = pc_is_isa32 (get_frame_pc (fi));
frame_extra_info_zalloc (fi, sizeof (struct frame_extra_info));
if (get_next_frame (fi))
deprecated_update_frame_pc_hack (fi, DEPRECATED_FRAME_SAVED_PC (get_next_frame (fi)));
if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (fi), get_frame_base (fi),
get_frame_base (fi)))
{
/* We need to setup fi->frame here because call_function_by_hand
gets it wrong by assuming it's always FP. */
deprecated_update_frame_base_hack (fi, deprecated_read_register_dummy (get_frame_pc (fi), get_frame_base (fi), SP_REGNUM));
get_frame_extra_info (fi)->return_pc =
deprecated_read_register_dummy (get_frame_pc (fi),
get_frame_base (fi), PC_REGNUM);
get_frame_extra_info (fi)->f_offset = -4;
get_frame_extra_info (fi)->leaf_function = 0;
return;
}
else
{
DEPRECATED_FRAME_INIT_SAVED_REGS (fi);
get_frame_extra_info (fi)->return_pc =
sh64_get_saved_pr (fi, PR_REGNUM);
}
}
static void
sh64_get_saved_register (char *raw_buffer, int *optimized, CORE_ADDR *addrp,
struct frame_info *frame, int regnum,
enum lval_type *lval)
{
int media_mode;
int live_regnum = regnum;
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
if (!target_has_registers)
error ("No registers.");
/* Normal systems don't optimize out things with register numbers. */
if (optimized != NULL)
*optimized = 0;
if (addrp) /* default assumption: not found in memory */
*addrp = 0;
if (raw_buffer)
memset (raw_buffer, 0, sizeof (raw_buffer));
/* We must do this here, before the following while loop changes
frame, and makes it NULL. If this is a media register number,
but we are in compact mode, it will become the corresponding
compact pseudo register. If there is no corresponding compact
pseudo-register what do we do?*/
media_mode = pc_is_isa32 (get_frame_pc (frame));
live_regnum = translate_insn_rn (regnum, media_mode);
/* Note: since the current frame's registers could only have been
saved by frames INTERIOR TO the current frame, we skip examining
the current frame itself: otherwise, we would be getting the
previous frame's registers which were saved by the current frame. */
while (frame && ((frame = get_next_frame (frame)) != NULL))
{
if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame),
get_frame_base (frame),
get_frame_base (frame)))
{
if (lval) /* found it in a CALL_DUMMY frame */
*lval = not_lval;
if (raw_buffer)
memcpy (raw_buffer,
(deprecated_generic_find_dummy_frame (get_frame_pc (frame), get_frame_base (frame))
+ DEPRECATED_REGISTER_BYTE (regnum)),
register_size (current_gdbarch, regnum));
return;
}
DEPRECATED_FRAME_INIT_SAVED_REGS (frame);
if (deprecated_get_frame_saved_regs (frame) != NULL
&& deprecated_get_frame_saved_regs (frame)[regnum] != 0)
{
if (lval) /* found it saved on the stack */
*lval = lval_memory;
if (regnum == SP_REGNUM)
{
if (raw_buffer) /* SP register treated specially */
store_unsigned_integer (raw_buffer,
register_size (current_gdbarch,
regnum),
deprecated_get_frame_saved_regs (frame)[regnum]);
}
else
{ /* any other register */
if (addrp)
*addrp = deprecated_get_frame_saved_regs (frame)[regnum];
if (raw_buffer)
{
int size;
if (tdep->sh_abi == SH_ABI_32
&& (live_regnum == DEPRECATED_FP_REGNUM
|| live_regnum == PR_REGNUM))
size = 4;
else
size = register_size (current_gdbarch, live_regnum);
if (TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE)
read_memory (deprecated_get_frame_saved_regs (frame)[regnum],
raw_buffer, size);
else
read_memory (deprecated_get_frame_saved_regs (frame)[regnum],
raw_buffer
+ register_size (current_gdbarch, live_regnum)
- size,
size);
}
}
return;
}
}
/* If we get thru the loop to this point, it means the register was
not saved in any frame. Return the actual live-register value. */
if (lval) /* found it in a live register */
*lval = lval_register;
if (addrp)
*addrp = DEPRECATED_REGISTER_BYTE (live_regnum);
if (raw_buffer)
deprecated_read_register_gen (live_regnum, raw_buffer);
}
static CORE_ADDR
sh64_extract_struct_value_address (struct regcache *regcache)
{
/* FIXME: cagney/2004-01-17: Does the ABI guarantee that the return
address regster is preserved across function calls? Probably
not, making this function wrong. */
ULONGEST val;
regcache_raw_read_unsigned (regcache, STRUCT_RETURN_REGNUM, &val);
return val;
}
static CORE_ADDR
sh_frame_saved_pc (struct frame_info *frame)
{
return (get_frame_extra_info (frame)->return_pc);
}
/* Discard from the stack the innermost frame, restoring all saved registers.
Used in the 'return' command. */
static void
sh64_pop_frame (void)
{
struct frame_info *frame = get_current_frame ();
CORE_ADDR fp;
int regnum;
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
int media_mode = pc_is_isa32 (get_frame_pc (frame));
if (DEPRECATED_PC_IN_CALL_DUMMY (get_frame_pc (frame),
get_frame_base (frame),
get_frame_base (frame)))
deprecated_pop_dummy_frame ();
else
{
fp = get_frame_base (frame);
DEPRECATED_FRAME_INIT_SAVED_REGS (frame);
/* Copy regs from where they were saved in the frame */
for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++)
if (deprecated_get_frame_saved_regs (frame)[regnum])
{
int size;
if (tdep->sh_abi == SH_ABI_32
&& (regnum == DEPRECATED_FP_REGNUM
|| regnum == PR_REGNUM))
size = 4;
else
size = register_size (current_gdbarch,
translate_insn_rn (regnum, media_mode));
write_register (regnum,
read_memory_integer (deprecated_get_frame_saved_regs (frame)[regnum],
size));
}
write_register (PC_REGNUM, get_frame_extra_info (frame)->return_pc);
write_register (SP_REGNUM, fp + 8);
}
flush_cached_frames ();
}
static CORE_ADDR
sh_frame_align (struct gdbarch *ignore, CORE_ADDR sp)
{
return sp & ~3;
}
/* Function: push_arguments
Setup the function arguments for calling a function in the inferior.
On the Renesas SH architecture, there are four registers (R4 to R7)
which are dedicated for passing function arguments. Up to the first
four arguments (depending on size) may go into these registers.
The rest go on the stack.
Arguments that are smaller than 4 bytes will still take up a whole
register or a whole 32-bit word on the stack, and will be
right-justified in the register or the stack word. This includes
chars, shorts, and small aggregate types.
Arguments that are larger than 4 bytes may be split between two or
more registers. If there are not enough registers free, an argument
may be passed partly in a register (or registers), and partly on the
stack. This includes doubles, long longs, and larger aggregates.
As far as I know, there is no upper limit to the size of aggregates
that will be passed in this way; in other words, the convention of
passing a pointer to a large aggregate instead of a copy is not used.
An exceptional case exists for struct arguments (and possibly other
aggregates such as arrays) if the size is larger than 4 bytes but
not a multiple of 4 bytes. In this case the argument is never split
between the registers and the stack, but instead is copied in its
entirety onto the stack, AND also copied into as many registers as
there is room for. In other words, space in registers permitting,
two copies of the same argument are passed in. As far as I can tell,
only the one on the stack is used, although that may be a function
of the level of compiler optimization. I suspect this is a compiler
bug. Arguments of these odd sizes are left-justified within the
word (as opposed to arguments smaller than 4 bytes, which are
right-justified).
If the function is to return an aggregate type such as a struct, it
is either returned in the normal return value register R0 (if its
size is no greater than one byte), or else the caller must allocate
space into which the callee will copy the return value (if the size
is greater than one byte). In this case, a pointer to the return
value location is passed into the callee in register R2, which does
not displace any of the other arguments passed in via registers R4
to R7. */
/* R2-R9 for integer types and integer equivalent (char, pointers) and
non-scalar (struct, union) elements (even if the elements are
floats).
FR0-FR11 for single precision floating point (float)
DR0-DR10 for double precision floating point (double)
If a float is argument number 3 (for instance) and arguments number
1,2, and 4 are integer, the mapping will be:
arg1 -->R2, arg2 --> R3, arg3 -->FR0, arg4 --> R5. I.e. R4 is not used.
If a float is argument number 10 (for instance) and arguments number
1 through 10 are integer, the mapping will be:
arg1->R2, arg2->R3, arg3->R4, arg4->R5, arg5->R6, arg6->R7, arg7->R8,
arg8->R9, arg9->(0,SP)stack(8-byte aligned), arg10->FR0, arg11->stack(16,SP).
I.e. there is hole in the stack.
Different rules apply for variable arguments functions, and for functions
for which the prototype is not known. */
static CORE_ADDR
sh64_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
{
int stack_offset, stack_alloc;
int int_argreg;
int float_argreg;
int double_argreg;
int float_arg_index = 0;
int double_arg_index = 0;
int argnum;
struct type *type;
CORE_ADDR regval;
char *val;
char valbuf[8];
char valbuf_tmp[8];
int len;
int argreg_size;
int fp_args[12];
memset (fp_args, 0, sizeof (fp_args));
/* first force sp to a 8-byte alignment */
sp = sp & ~7;
/* The "struct return pointer" pseudo-argument has its own dedicated
register */
if (struct_return)
write_register (STRUCT_RETURN_REGNUM, struct_addr);
/* Now make sure there's space on the stack */
for (argnum = 0, stack_alloc = 0; argnum < nargs; argnum++)
stack_alloc += ((TYPE_LENGTH (VALUE_TYPE (args[argnum])) + 7) & ~7);
sp -= stack_alloc; /* make room on stack for args */
/* Now load as many as possible of the first arguments into
registers, and push the rest onto the stack. There are 64 bytes
in eight registers available. Loop thru args from first to last. */
int_argreg = ARG0_REGNUM;
float_argreg = FP0_REGNUM;
double_argreg = DR0_REGNUM;
for (argnum = 0, stack_offset = 0; argnum < nargs; argnum++)
{
type = VALUE_TYPE (args[argnum]);
len = TYPE_LENGTH (type);
memset (valbuf, 0, sizeof (valbuf));
if (TYPE_CODE (type) != TYPE_CODE_FLT)
{
argreg_size = register_size (current_gdbarch, int_argreg);
if (len < argreg_size)
{
/* value gets right-justified in the register or stack word */
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
memcpy (valbuf + argreg_size - len,
(char *) VALUE_CONTENTS (args[argnum]), len);
else
memcpy (valbuf, (char *) VALUE_CONTENTS (args[argnum]), len);
val = valbuf;
}
else
val = (char *) VALUE_CONTENTS (args[argnum]);
while (len > 0)
{
if (int_argreg > ARGLAST_REGNUM)
{
/* must go on the stack */
write_memory (sp + stack_offset, val, argreg_size);
stack_offset += 8;/*argreg_size;*/
}
/* NOTE WELL!!!!! This is not an "else if" clause!!!
That's because some *&^%$ things get passed on the stack
AND in the registers! */
if (int_argreg <= ARGLAST_REGNUM)
{
/* there's room in a register */
regval = extract_unsigned_integer (val, argreg_size);
write_register (int_argreg, regval);
}
/* Store the value 8 bytes at a time. This means that
things larger than 8 bytes may go partly in registers
and partly on the stack. FIXME: argreg is incremented
before we use its size. */
len -= argreg_size;
val += argreg_size;
int_argreg++;
}
}
else
{
val = (char *) VALUE_CONTENTS (args[argnum]);
if (len == 4)
{
/* Where is it going to be stored? */
while (fp_args[float_arg_index])
float_arg_index ++;
/* Now float_argreg points to the register where it
should be stored. Are we still within the allowed
register set? */
if (float_arg_index <= FLOAT_ARGLAST_REGNUM)
{
/* Goes in FR0...FR11 */
deprecated_write_register_gen (FP0_REGNUM + float_arg_index,
val);
fp_args[float_arg_index] = 1;
/* Skip the corresponding general argument register. */
int_argreg ++;
}
else
;
/* Store it as the integers, 8 bytes at the time, if
necessary spilling on the stack. */
}
else if (len == 8)
{
/* Where is it going to be stored? */
while (fp_args[double_arg_index])
double_arg_index += 2;
/* Now double_argreg points to the register
where it should be stored.
Are we still within the allowed register set? */
if (double_arg_index < FLOAT_ARGLAST_REGNUM)
{
/* Goes in DR0...DR10 */
/* The numbering of the DRi registers is consecutive,
i.e. includes odd numbers. */
int double_register_offset = double_arg_index / 2;
int regnum = DR0_REGNUM +
double_register_offset;
#if 0
if (TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE)
{
memset (valbuf_tmp, 0, sizeof (valbuf_tmp));
DEPRECATED_REGISTER_CONVERT_TO_VIRTUAL (regnum,
type, val,
valbuf_tmp);
val = valbuf_tmp;
}
#endif
/* Note: must use write_register_gen here instead
of regcache_raw_write, because
regcache_raw_write works only for real
registers, not pseudo. write_register_gen will
call the gdbarch function to do register
writes, and that will properly know how to deal
with pseudoregs. */
deprecated_write_register_gen (regnum, val);
fp_args[double_arg_index] = 1;
fp_args[double_arg_index + 1] = 1;
/* Skip the corresponding general argument register. */
int_argreg ++;
}
else
;
/* Store it as the integers, 8 bytes at the time, if
necessary spilling on the stack. */
}
}
}
return sp;
}
/* Function: push_return_address (pc)
Set up the return address for the inferior function call.
Needed for targets where we don't actually execute a JSR/BSR instruction */
static CORE_ADDR
sh64_push_return_address (CORE_ADDR pc, CORE_ADDR sp)
{
write_register (PR_REGNUM, entry_point_address ());
return sp;
}
/* Find a function's return value in the appropriate registers (in
regbuf), and copy it into valbuf. Extract from an array REGBUF
containing the (raw) register state a function return value of type
TYPE, and copy that, in virtual format, into VALBUF. */
static void
sh64_extract_return_value (struct type *type, char *regbuf, char *valbuf)
{
int offset;
int return_register;
int len = TYPE_LENGTH (type);
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
if (len == 4)
{
/* Return value stored in FP0_REGNUM */
return_register = FP0_REGNUM;
offset = DEPRECATED_REGISTER_BYTE (return_register);
memcpy (valbuf, (char *) regbuf + offset, len);
}
else if (len == 8)
{
/* return value stored in DR0_REGNUM */
DOUBLEST val;
return_register = DR0_REGNUM;
offset = DEPRECATED_REGISTER_BYTE (return_register);
if (TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE)
floatformat_to_doublest (&floatformat_ieee_double_littlebyte_bigword,
(char *) regbuf + offset, &val);
else
floatformat_to_doublest (&floatformat_ieee_double_big,
(char *) regbuf + offset, &val);
store_typed_floating (valbuf, type, val);
}
}
else
{
if (len <= 8)
{
/* Result is in register 2. If smaller than 8 bytes, it is padded
at the most significant end. */
return_register = DEFAULT_RETURN_REGNUM;
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
offset = DEPRECATED_REGISTER_BYTE (return_register) +
register_size (current_gdbarch, return_register) - len;
else
offset = DEPRECATED_REGISTER_BYTE (return_register);
memcpy (valbuf, (char *) regbuf + offset, len);
}
else
error ("bad size for return value");
}
}
/* Write into appropriate registers a function return value
of type TYPE, given in virtual format.
If the architecture is sh4 or sh3e, store a function's return value
in the R0 general register or in the FP0 floating point register,
depending on the type of the return value. In all the other cases
the result is stored in r0, left-justified. */
static void
sh64_store_return_value (struct type *type, char *valbuf)
{
char buf[64]; /* more than enough... */
int len = TYPE_LENGTH (type);
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
if (len == 4)
{
/* Return value stored in FP0_REGNUM */
deprecated_write_register_gen (FP0_REGNUM, valbuf);
}
if (len == 8)
{
/* return value stored in DR0_REGNUM */
/* FIXME: Implement */
}
}
else
{
int return_register = DEFAULT_RETURN_REGNUM;
int offset = 0;
if (len <= register_size (current_gdbarch, return_register))
{
/* Pad with zeros. */
memset (buf, 0, register_size (current_gdbarch, return_register));
if (TARGET_BYTE_ORDER == BFD_ENDIAN_LITTLE)
offset = 0; /*register_size (current_gdbarch,
return_register) - len;*/
else
offset = register_size (current_gdbarch, return_register) - len;
memcpy (buf + offset, valbuf, len);
deprecated_write_register_gen (return_register, buf);
}
else
deprecated_write_register_gen (return_register, valbuf);
}
}
static void
sh64_show_media_regs (void)
{
int i;
printf_filtered ("PC=%s SR=%016llx \n",
paddr (read_register (PC_REGNUM)),
(long long) read_register (SR_REGNUM));
printf_filtered ("SSR=%016llx SPC=%016llx \n",
(long long) read_register (SSR_REGNUM),
(long long) read_register (SPC_REGNUM));
printf_filtered ("FPSCR=%016lx\n ",
(long) read_register (FPSCR_REGNUM));
for (i = 0; i < 64; i = i + 4)
printf_filtered ("\nR%d-R%d %016llx %016llx %016llx %016llx\n",
i, i + 3,
(long long) read_register (i + 0),
(long long) read_register (i + 1),
(long long) read_register (i + 2),
(long long) read_register (i + 3));
printf_filtered ("\n");
for (i = 0; i < 64; i = i + 8)
printf_filtered ("FR%d-FR%d %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
i, i + 7,
(long) read_register (FP0_REGNUM + i + 0),
(long) read_register (FP0_REGNUM + i + 1),
(long) read_register (FP0_REGNUM + i + 2),
(long) read_register (FP0_REGNUM + i + 3),
(long) read_register (FP0_REGNUM + i + 4),
(long) read_register (FP0_REGNUM + i + 5),
(long) read_register (FP0_REGNUM + i + 6),
(long) read_register (FP0_REGNUM + i + 7));
}
static void
sh64_show_compact_regs (void)
{
int i;
printf_filtered ("PC=%s \n",
paddr (read_register (PC_C_REGNUM)));
printf_filtered ("GBR=%08lx MACH=%08lx MACL=%08lx PR=%08lx T=%08lx\n",
(long) read_register (GBR_C_REGNUM),
(long) read_register (MACH_C_REGNUM),
(long) read_register (MACL_C_REGNUM),
(long) read_register (PR_C_REGNUM),
(long) read_register (T_C_REGNUM));
printf_filtered ("FPSCR=%08lx FPUL=%08lx\n",
(long) read_register (FPSCR_C_REGNUM),
(long) read_register (FPUL_C_REGNUM));
for (i = 0; i < 16; i = i + 4)
printf_filtered ("\nR%d-R%d %08lx %08lx %08lx %08lx\n",
i, i + 3,
(long) read_register (i + 0),
(long) read_register (i + 1),
(long) read_register (i + 2),
(long) read_register (i + 3));
printf_filtered ("\n");
for (i = 0; i < 16; i = i + 8)
printf_filtered ("FR%d-FR%d %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
i, i + 7,
(long) read_register (FP0_REGNUM + i + 0),
(long) read_register (FP0_REGNUM + i + 1),
(long) read_register (FP0_REGNUM + i + 2),
(long) read_register (FP0_REGNUM + i + 3),
(long) read_register (FP0_REGNUM + i + 4),
(long) read_register (FP0_REGNUM + i + 5),
(long) read_register (FP0_REGNUM + i + 6),
(long) read_register (FP0_REGNUM + i + 7));
}
/* FIXME!!! This only shows the registers for shmedia, excluding the
pseudo registers. */
void
sh64_show_regs (void)
{
if (deprecated_selected_frame
&& pc_is_isa32 (get_frame_pc (deprecated_selected_frame)))
sh64_show_media_regs ();
else
sh64_show_compact_regs ();
}
/* *INDENT-OFF* */
/*
SH MEDIA MODE (ISA 32)
general registers (64-bit) 0-63
0 r0, r1, r2, r3, r4, r5, r6, r7,
64 r8, r9, r10, r11, r12, r13, r14, r15,
128 r16, r17, r18, r19, r20, r21, r22, r23,
192 r24, r25, r26, r27, r28, r29, r30, r31,
256 r32, r33, r34, r35, r36, r37, r38, r39,
320 r40, r41, r42, r43, r44, r45, r46, r47,
384 r48, r49, r50, r51, r52, r53, r54, r55,
448 r56, r57, r58, r59, r60, r61, r62, r63,
pc (64-bit) 64
512 pc,
status reg., saved status reg., saved pc reg. (64-bit) 65-67
520 sr, ssr, spc,
target registers (64-bit) 68-75
544 tr0, tr1, tr2, tr3, tr4, tr5, tr6, tr7,
floating point state control register (32-bit) 76
608 fpscr,
single precision floating point registers (32-bit) 77-140
612 fr0, fr1, fr2, fr3, fr4, fr5, fr6, fr7,
644 fr8, fr9, fr10, fr11, fr12, fr13, fr14, fr15,
676 fr16, fr17, fr18, fr19, fr20, fr21, fr22, fr23,
708 fr24, fr25, fr26, fr27, fr28, fr29, fr30, fr31,
740 fr32, fr33, fr34, fr35, fr36, fr37, fr38, fr39,
772 fr40, fr41, fr42, fr43, fr44, fr45, fr46, fr47,
804 fr48, fr49, fr50, fr51, fr52, fr53, fr54, fr55,
836 fr56, fr57, fr58, fr59, fr60, fr61, fr62, fr63,
TOTAL SPACE FOR REGISTERS: 868 bytes
From here on they are all pseudo registers: no memory allocated.
REGISTER_BYTE returns the register byte for the base register.
double precision registers (pseudo) 141-172
dr0, dr2, dr4, dr6, dr8, dr10, dr12, dr14,
dr16, dr18, dr20, dr22, dr24, dr26, dr28, dr30,
dr32, dr34, dr36, dr38, dr40, dr42, dr44, dr46,
dr48, dr50, dr52, dr54, dr56, dr58, dr60, dr62,
floating point pairs (pseudo) 173-204
fp0, fp2, fp4, fp6, fp8, fp10, fp12, fp14,
fp16, fp18, fp20, fp22, fp24, fp26, fp28, fp30,
fp32, fp34, fp36, fp38, fp40, fp42, fp44, fp46,
fp48, fp50, fp52, fp54, fp56, fp58, fp60, fp62,
floating point vectors (4 floating point regs) (pseudo) 205-220
fv0, fv4, fv8, fv12, fv16, fv20, fv24, fv28,
fv32, fv36, fv40, fv44, fv48, fv52, fv56, fv60,
SH COMPACT MODE (ISA 16) (all pseudo) 221-272
r0_c, r1_c, r2_c, r3_c, r4_c, r5_c, r6_c, r7_c,
r8_c, r9_c, r10_c, r11_c, r12_c, r13_c, r14_c, r15_c,
pc_c,
gbr_c, mach_c, macl_c, pr_c, t_c,
fpscr_c, fpul_c,
fr0_c, fr1_c, fr2_c, fr3_c, fr4_c, fr5_c, fr6_c, fr7_c,
fr8_c, fr9_c, fr10_c, fr11_c, fr12_c, fr13_c, fr14_c, fr15_c
dr0_c, dr2_c, dr4_c, dr6_c, dr8_c, dr10_c, dr12_c, dr14_c
fv0_c, fv4_c, fv8_c, fv12_c
*/
/* *INDENT-ON* */
static int
sh64_register_byte (int reg_nr)
{
int base_regnum = -1;
/* If it is a pseudo register, get the number of the first floating
point register that is part of it. */
if (reg_nr >= DR0_REGNUM
&& reg_nr <= DR_LAST_REGNUM)
base_regnum = dr_reg_base_num (reg_nr);
else if (reg_nr >= FPP0_REGNUM
&& reg_nr <= FPP_LAST_REGNUM)
base_regnum = fpp_reg_base_num (reg_nr);
else if (reg_nr >= FV0_REGNUM
&& reg_nr <= FV_LAST_REGNUM)
base_regnum = fv_reg_base_num (reg_nr);
/* sh compact pseudo register. FPSCR is a pathological case, need to
treat it as special. */
else if ((reg_nr >= R0_C_REGNUM
&& reg_nr <= FV_LAST_C_REGNUM)
&& reg_nr != FPSCR_C_REGNUM)
base_regnum = sh64_compact_reg_base_num (reg_nr);
/* Now return the offset in bytes within the register cache. */
/* sh media pseudo register, i.e. any of DR, FFP, FV registers. */
if (reg_nr >= DR0_REGNUM
&& reg_nr <= FV_LAST_REGNUM)
return (base_regnum - FP0_REGNUM + 1) * 4
+ (TR7_REGNUM + 1) * 8;
/* sh compact pseudo register: general register */
if ((reg_nr >= R0_C_REGNUM
&& reg_nr <= R_LAST_C_REGNUM))
return (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
? base_regnum * 8 + 4
: base_regnum * 8);
/* sh compact pseudo register: */
if (reg_nr == PC_C_REGNUM
|| reg_nr == GBR_C_REGNUM
|| reg_nr == MACL_C_REGNUM
|| reg_nr == PR_C_REGNUM)
return (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
? base_regnum * 8 + 4
: base_regnum * 8);
if (reg_nr == MACH_C_REGNUM)
return base_regnum * 8;
if (reg_nr == T_C_REGNUM)
return base_regnum * 8; /* FIXME??? how do we get bit 0? Do we have to? */
/* sh compact pseudo register: floating point register */
else if (reg_nr >= FP0_C_REGNUM
&& reg_nr <= FV_LAST_C_REGNUM)
return (base_regnum - FP0_REGNUM) * 4
+ (TR7_REGNUM + 1) * 8 + 4;
else if (reg_nr == FPSCR_C_REGNUM)
/* This is complicated, for now return the beginning of the
architectural FPSCR register. */
return (TR7_REGNUM + 1) * 8;
else if (reg_nr == FPUL_C_REGNUM)
return ((base_regnum - FP0_REGNUM) * 4 +
(TR7_REGNUM + 1) * 8 + 4);
/* It is not a pseudo register. */
/* It is a 64 bit register. */
else if (reg_nr <= TR7_REGNUM)
return reg_nr * 8;
/* It is a 32 bit register. */
else if (reg_nr == FPSCR_REGNUM)
return (FPSCR_REGNUM * 8);
/* It is floating point 32-bit register */
else
return ((TR7_REGNUM + 1) * 8
+ (reg_nr - FP0_REGNUM + 1) * 4);
}
static struct type *
sh64_build_float_register_type (int high)
{
struct type *temp;
temp = create_range_type (NULL, builtin_type_int, 0, high);
return create_array_type (NULL, builtin_type_float, temp);
}
/* Return the GDB type object for the "standard" data type
of data in register REG_NR. */
static struct type *
sh64_register_type (struct gdbarch *gdbarch, int reg_nr)
{
if ((reg_nr >= FP0_REGNUM
&& reg_nr <= FP_LAST_REGNUM)
|| (reg_nr >= FP0_C_REGNUM
&& reg_nr <= FP_LAST_C_REGNUM))
return builtin_type_float;
else if ((reg_nr >= DR0_REGNUM
&& reg_nr <= DR_LAST_REGNUM)
|| (reg_nr >= DR0_C_REGNUM
&& reg_nr <= DR_LAST_C_REGNUM))
return builtin_type_double;
else if (reg_nr >= FPP0_REGNUM
&& reg_nr <= FPP_LAST_REGNUM)
return sh64_build_float_register_type (1);
else if ((reg_nr >= FV0_REGNUM
&& reg_nr <= FV_LAST_REGNUM)
||(reg_nr >= FV0_C_REGNUM
&& reg_nr <= FV_LAST_C_REGNUM))
return sh64_build_float_register_type (3);
else if (reg_nr == FPSCR_REGNUM)
return builtin_type_int;
else if (reg_nr >= R0_C_REGNUM
&& reg_nr < FP0_C_REGNUM)
return builtin_type_int;
else
return builtin_type_long_long;
}
static void
sh64_register_convert_to_virtual (int regnum, struct type *type,
char *from, char *to)
{
if (TARGET_BYTE_ORDER != BFD_ENDIAN_LITTLE)
{
/* It is a no-op. */
memcpy (to, from, register_size (current_gdbarch, regnum));
return;
}
if ((regnum >= DR0_REGNUM
&& regnum <= DR_LAST_REGNUM)
|| (regnum >= DR0_C_REGNUM
&& regnum <= DR_LAST_C_REGNUM))
{
DOUBLEST val;
floatformat_to_doublest (&floatformat_ieee_double_littlebyte_bigword,
from, &val);
store_typed_floating (to, type, val);
}
else
error ("sh64_register_convert_to_virtual called with non DR register number");
}
static void
sh64_register_convert_to_raw (struct type *type, int regnum,
const void *from, void *to)
{
if (TARGET_BYTE_ORDER != BFD_ENDIAN_LITTLE)
{
/* It is a no-op. */
memcpy (to, from, register_size (current_gdbarch, regnum));
return;
}
if ((regnum >= DR0_REGNUM
&& regnum <= DR_LAST_REGNUM)
|| (regnum >= DR0_C_REGNUM
&& regnum <= DR_LAST_C_REGNUM))
{
DOUBLEST val = deprecated_extract_floating (from, TYPE_LENGTH(type));
floatformat_from_doublest (&floatformat_ieee_double_littlebyte_bigword,
&val, to);
}
else
error ("sh64_register_convert_to_raw called with non DR register number");
}
static void
sh64_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache,
int reg_nr, void *buffer)
{
int base_regnum;
int portion;
int offset = 0;
char temp_buffer[MAX_REGISTER_SIZE];
if (reg_nr >= DR0_REGNUM
&& reg_nr <= DR_LAST_REGNUM)
{
base_regnum = dr_reg_base_num (reg_nr);
/* Build the value in the provided buffer. */
/* DR regs are double precision registers obtained by
concatenating 2 single precision floating point registers. */
for (portion = 0; portion < 2; portion++)
regcache_raw_read (regcache, base_regnum + portion,
(temp_buffer
+ register_size (gdbarch, base_regnum) * portion));
/* We must pay attention to the endianness. */
sh64_register_convert_to_virtual (reg_nr,
gdbarch_register_type (gdbarch,
reg_nr),
temp_buffer, buffer);
}
else if (reg_nr >= FPP0_REGNUM
&& reg_nr <= FPP_LAST_REGNUM)
{
base_regnum = fpp_reg_base_num (reg_nr);
/* Build the value in the provided buffer. */
/* FPP regs are pairs of single precision registers obtained by
concatenating 2 single precision floating point registers. */
for (portion = 0; portion < 2; portion++)
regcache_raw_read (regcache, base_regnum + portion,
((char *) buffer
+ register_size (gdbarch, base_regnum) * portion));
}
else if (reg_nr >= FV0_REGNUM
&& reg_nr <= FV_LAST_REGNUM)
{
base_regnum = fv_reg_base_num (reg_nr);
/* Build the value in the provided buffer. */
/* FV regs are vectors of single precision registers obtained by
concatenating 4 single precision floating point registers. */
for (portion = 0; portion < 4; portion++)
regcache_raw_read (regcache, base_regnum + portion,
((char *) buffer
+ register_size (gdbarch, base_regnum) * portion));
}
/* sh compact pseudo registers. 1-to-1 with a shmedia register */
else if (reg_nr >= R0_C_REGNUM
&& reg_nr <= T_C_REGNUM)
{
base_regnum = sh64_compact_reg_base_num (reg_nr);
/* Build the value in the provided buffer. */
regcache_raw_read (regcache, base_regnum, temp_buffer);
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
offset = 4;
memcpy (buffer, temp_buffer + offset, 4); /* get LOWER 32 bits only????*/
}
else if (reg_nr >= FP0_C_REGNUM
&& reg_nr <= FP_LAST_C_REGNUM)
{
base_regnum = sh64_compact_reg_base_num (reg_nr);
/* Build the value in the provided buffer. */
/* Floating point registers map 1-1 to the media fp regs,
they have the same size and endianness. */
regcache_raw_read (regcache, base_regnum, buffer);
}
else if (reg_nr >= DR0_C_REGNUM
&& reg_nr <= DR_LAST_C_REGNUM)
{
base_regnum = sh64_compact_reg_base_num (reg_nr);
/* DR_C regs are double precision registers obtained by
concatenating 2 single precision floating point registers. */
for (portion = 0; portion < 2; portion++)
regcache_raw_read (regcache, base_regnum + portion,
(temp_buffer
+ register_size (gdbarch, base_regnum) * portion));
/* We must pay attention to the endianness. */
sh64_register_convert_to_virtual (reg_nr,
gdbarch_register_type (gdbarch,
reg_nr),
temp_buffer, buffer);
}
else if (reg_nr >= FV0_C_REGNUM
&& reg_nr <= FV_LAST_C_REGNUM)
{
base_regnum = sh64_compact_reg_base_num (reg_nr);
/* Build the value in the provided buffer. */
/* FV_C regs are vectors of single precision registers obtained by
concatenating 4 single precision floating point registers. */
for (portion = 0; portion < 4; portion++)
regcache_raw_read (regcache, base_regnum + portion,
((char *) buffer
+ register_size (gdbarch, base_regnum) * portion));
}
else if (reg_nr == FPSCR_C_REGNUM)
{
int fpscr_base_regnum;
int sr_base_regnum;
unsigned int fpscr_value;
unsigned int sr_value;
unsigned int fpscr_c_value;
unsigned int fpscr_c_part1_value;
unsigned int fpscr_c_part2_value;
fpscr_base_regnum = FPSCR_REGNUM;
sr_base_regnum = SR_REGNUM;
/* Build the value in the provided buffer. */
/* FPSCR_C is a very weird register that contains sparse bits
from the FPSCR and the SR architectural registers.
Specifically: */
/* *INDENT-OFF* */
/*
FPSRC_C bit
0 Bit 0 of FPSCR
1 reserved
2-17 Bit 2-18 of FPSCR
18-20 Bits 12,13,14 of SR
21-31 reserved
*/
/* *INDENT-ON* */
/* Get FPSCR into a local buffer */
regcache_raw_read (regcache, fpscr_base_regnum, temp_buffer);
/* Get value as an int. */
fpscr_value = extract_unsigned_integer (temp_buffer, 4);
/* Get SR into a local buffer */
regcache_raw_read (regcache, sr_base_regnum, temp_buffer);
/* Get value as an int. */
sr_value = extract_unsigned_integer (temp_buffer, 4);
/* Build the new value. */
fpscr_c_part1_value = fpscr_value & 0x3fffd;
fpscr_c_part2_value = (sr_value & 0x7000) << 6;
fpscr_c_value = fpscr_c_part1_value | fpscr_c_part2_value;
/* Store that in out buffer!!! */
store_unsigned_integer (buffer, 4, fpscr_c_value);
/* FIXME There is surely an endianness gotcha here. */
}
else if (reg_nr == FPUL_C_REGNUM)
{
base_regnum = sh64_compact_reg_base_num (reg_nr);
/* FPUL_C register is floating point register 32,
same size, same endianness. */
regcache_raw_read (regcache, base_regnum, buffer);
}
}
static void
sh64_pseudo_register_write (struct gdbarch *gdbarch, struct regcache *regcache,
int reg_nr, const void *buffer)
{
int base_regnum, portion;
int offset;
char temp_buffer[MAX_REGISTER_SIZE];
if (reg_nr >= DR0_REGNUM
&& reg_nr <= DR_LAST_REGNUM)
{
base_regnum = dr_reg_base_num (reg_nr);
/* We must pay attention to the endianness. */
sh64_register_convert_to_raw (gdbarch_register_type (gdbarch, reg_nr),
reg_nr,
buffer, temp_buffer);
/* Write the real regs for which this one is an alias. */
for (portion = 0; portion < 2; portion++)
regcache_raw_write (regcache, base_regnum + portion,
(temp_buffer
+ register_size (gdbarch,
base_regnum) * portion));
}
else if (reg_nr >= FPP0_REGNUM
&& reg_nr <= FPP_LAST_REGNUM)
{
base_regnum = fpp_reg_base_num (reg_nr);
/* Write the real regs for which this one is an alias. */
for (portion = 0; portion < 2; portion++)
regcache_raw_write (regcache, base_regnum + portion,
((char *) buffer
+ register_size (gdbarch,
base_regnum) * portion));
}
else if (reg_nr >= FV0_REGNUM
&& reg_nr <= FV_LAST_REGNUM)
{
base_regnum = fv_reg_base_num (reg_nr);
/* Write the real regs for which this one is an alias. */
for (portion = 0; portion < 4; portion++)
regcache_raw_write (regcache, base_regnum + portion,
((char *) buffer
+ register_size (gdbarch,
base_regnum) * portion));
}
/* sh compact general pseudo registers. 1-to-1 with a shmedia
register but only 4 bytes of it. */
else if (reg_nr >= R0_C_REGNUM
&& reg_nr <= T_C_REGNUM)
{
base_regnum = sh64_compact_reg_base_num (reg_nr);
/* reg_nr is 32 bit here, and base_regnum is 64 bits. */
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
offset = 4;
else
offset = 0;
/* Let's read the value of the base register into a temporary
buffer, so that overwriting the last four bytes with the new
value of the pseudo will leave the upper 4 bytes unchanged. */
regcache_raw_read (regcache, base_regnum, temp_buffer);
/* Write as an 8 byte quantity */
memcpy (temp_buffer + offset, buffer, 4);
regcache_raw_write (regcache, base_regnum, temp_buffer);
}
/* sh floating point compact pseudo registers. 1-to-1 with a shmedia
registers. Both are 4 bytes. */
else if (reg_nr >= FP0_C_REGNUM
&& reg_nr <= FP_LAST_C_REGNUM)
{
base_regnum = sh64_compact_reg_base_num (reg_nr);
regcache_raw_write (regcache, base_regnum, buffer);
}
else if (reg_nr >= DR0_C_REGNUM
&& reg_nr <= DR_LAST_C_REGNUM)
{
base_regnum = sh64_compact_reg_base_num (reg_nr);
for (portion = 0; portion < 2; portion++)
{
/* We must pay attention to the endianness. */
sh64_register_convert_to_raw (gdbarch_register_type (gdbarch,
reg_nr),
reg_nr,
buffer, temp_buffer);
regcache_raw_write (regcache, base_regnum + portion,
(temp_buffer
+ register_size (gdbarch,
base_regnum) * portion));
}
}
else if (reg_nr >= FV0_C_REGNUM
&& reg_nr <= FV_LAST_C_REGNUM)
{
base_regnum = sh64_compact_reg_base_num (reg_nr);
for (portion = 0; portion < 4; portion++)
{
regcache_raw_write (regcache, base_regnum + portion,
((char *) buffer
+ register_size (gdbarch,
base_regnum) * portion));
}
}
else if (reg_nr == FPSCR_C_REGNUM)
{
int fpscr_base_regnum;
int sr_base_regnum;
unsigned int fpscr_value;
unsigned int sr_value;
unsigned int old_fpscr_value;
unsigned int old_sr_value;
unsigned int fpscr_c_value;
unsigned int fpscr_mask;
unsigned int sr_mask;
fpscr_base_regnum = FPSCR_REGNUM;
sr_base_regnum = SR_REGNUM;
/* FPSCR_C is a very weird register that contains sparse bits
from the FPSCR and the SR architectural registers.
Specifically: */
/* *INDENT-OFF* */
/*
FPSRC_C bit
0 Bit 0 of FPSCR
1 reserved
2-17 Bit 2-18 of FPSCR
18-20 Bits 12,13,14 of SR
21-31 reserved
*/
/* *INDENT-ON* */
/* Get value as an int. */
fpscr_c_value = extract_unsigned_integer (buffer, 4);
/* Build the new values. */
fpscr_mask = 0x0003fffd;
sr_mask = 0x001c0000;
fpscr_value = fpscr_c_value & fpscr_mask;
sr_value = (fpscr_value & sr_mask) >> 6;
regcache_raw_read (regcache, fpscr_base_regnum, temp_buffer);
old_fpscr_value = extract_unsigned_integer (temp_buffer, 4);
old_fpscr_value &= 0xfffc0002;
fpscr_value |= old_fpscr_value;
store_unsigned_integer (temp_buffer, 4, fpscr_value);
regcache_raw_write (regcache, fpscr_base_regnum, temp_buffer);
regcache_raw_read (regcache, sr_base_regnum, temp_buffer);
old_sr_value = extract_unsigned_integer (temp_buffer, 4);
old_sr_value &= 0xffff8fff;
sr_value |= old_sr_value;
store_unsigned_integer (temp_buffer, 4, sr_value);
regcache_raw_write (regcache, sr_base_regnum, temp_buffer);
}
else if (reg_nr == FPUL_C_REGNUM)
{
base_regnum = sh64_compact_reg_base_num (reg_nr);
regcache_raw_write (regcache, base_regnum, buffer);
}
}
/* Floating point vector of 4 float registers. */
static void
do_fv_register_info (struct gdbarch *gdbarch, struct ui_file *file,
int fv_regnum)
{
int first_fp_reg_num = fv_reg_base_num (fv_regnum);
fprintf_filtered (file, "fv%d\t0x%08x\t0x%08x\t0x%08x\t0x%08x\n",
fv_regnum - FV0_REGNUM,
(int) read_register (first_fp_reg_num),
(int) read_register (first_fp_reg_num + 1),
(int) read_register (first_fp_reg_num + 2),
(int) read_register (first_fp_reg_num + 3));
}
/* Floating point vector of 4 float registers, compact mode. */
static void
do_fv_c_register_info (int fv_regnum)
{
int first_fp_reg_num = sh64_compact_reg_base_num (fv_regnum);
printf_filtered ("fv%d_c\t0x%08x\t0x%08x\t0x%08x\t0x%08x\n",
fv_regnum - FV0_C_REGNUM,
(int) read_register (first_fp_reg_num),
(int) read_register (first_fp_reg_num + 1),
(int) read_register (first_fp_reg_num + 2),
(int) read_register (first_fp_reg_num + 3));
}
/* Pairs of single regs. The DR are instead double precision
registers. */
static void
do_fpp_register_info (int fpp_regnum)
{
int first_fp_reg_num = fpp_reg_base_num (fpp_regnum);
printf_filtered ("fpp%d\t0x%08x\t0x%08x\n",
fpp_regnum - FPP0_REGNUM,
(int) read_register (first_fp_reg_num),
(int) read_register (first_fp_reg_num + 1));
}
/* Double precision registers. */
static void
do_dr_register_info (struct gdbarch *gdbarch, struct ui_file *file,
int dr_regnum)
{
int first_fp_reg_num = dr_reg_base_num (dr_regnum);
fprintf_filtered (file, "dr%d\t0x%08x%08x\n",
dr_regnum - DR0_REGNUM,
(int) read_register (first_fp_reg_num),
(int) read_register (first_fp_reg_num + 1));
}
/* Double precision registers, compact mode. */
static void
do_dr_c_register_info (int dr_regnum)
{
int first_fp_reg_num = sh64_compact_reg_base_num (dr_regnum);
printf_filtered ("dr%d_c\t0x%08x%08x\n",
dr_regnum - DR0_C_REGNUM,
(int) read_register (first_fp_reg_num),
(int) read_register (first_fp_reg_num +1));
}
/* General register in compact mode. */
static void
do_r_c_register_info (int r_c_regnum)
{
int regnum = sh64_compact_reg_base_num (r_c_regnum);
printf_filtered ("r%d_c\t0x%08x\n",
r_c_regnum - R0_C_REGNUM,
/*FIXME!!!*/ (int) read_register (regnum));
}
/* FIXME:!! THIS SHOULD TAKE CARE OF GETTING THE RIGHT PORTION OF THE
shmedia REGISTERS. */
/* Control registers, compact mode. */
static void
do_cr_c_register_info (int cr_c_regnum)
{
switch (cr_c_regnum)
{
case 237: printf_filtered ("pc_c\t0x%08x\n", (int) read_register (cr_c_regnum));
break;
case 238: printf_filtered ("gbr_c\t0x%08x\n", (int) read_register (cr_c_regnum));
break;
case 239: printf_filtered ("mach_c\t0x%08x\n", (int) read_register (cr_c_regnum));
break;
case 240: printf_filtered ("macl_c\t0x%08x\n", (int) read_register (cr_c_regnum));
break;
case 241: printf_filtered ("pr_c\t0x%08x\n", (int) read_register (cr_c_regnum));
break;
case 242: printf_filtered ("t_c\t0x%08x\n", (int) read_register (cr_c_regnum));
break;
case 243: printf_filtered ("fpscr_c\t0x%08x\n", (int) read_register (cr_c_regnum));
break;
case 244: printf_filtered ("fpul_c\t0x%08x\n", (int)read_register (cr_c_regnum));
break;
}
}
static void
sh_do_fp_register (struct gdbarch *gdbarch, struct ui_file *file, int regnum)
{ /* do values for FP (float) regs */
char *raw_buffer;
double flt; /* double extracted from raw hex data */
int inv;
int j;
/* Allocate space for the float. */
raw_buffer = (char *) alloca (register_size (gdbarch, FP0_REGNUM));
/* Get the data in raw format. */
if (!frame_register_read (get_selected_frame (), regnum, raw_buffer))
error ("can't read register %d (%s)", regnum, REGISTER_NAME (regnum));
/* Get the register as a number */
flt = unpack_double (builtin_type_float, raw_buffer, &inv);
/* Print the name and some spaces. */
fputs_filtered (REGISTER_NAME (regnum), file);
print_spaces_filtered (15 - strlen (REGISTER_NAME (regnum)), file);
/* Print the value. */
if (inv)
fprintf_filtered (file, "<invalid float>");
else
fprintf_filtered (file, "%-10.9g", flt);
/* Print the fp register as hex. */
fprintf_filtered (file, "\t(raw 0x");
for (j = 0; j < register_size (gdbarch, regnum); j++)
{
int idx = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG ? j
: register_size (gdbarch, regnum) - 1 - j;
fprintf_filtered (file, "%02x", (unsigned char) raw_buffer[idx]);
}
fprintf_filtered (file, ")");
fprintf_filtered (file, "\n");
}
static void
sh64_do_pseudo_register (int regnum)
{
/* All the sh64-compact mode registers are pseudo registers. */
if (regnum < NUM_REGS
|| regnum >= NUM_REGS + NUM_PSEUDO_REGS_SH_MEDIA + NUM_PSEUDO_REGS_SH_COMPACT)
internal_error (__FILE__, __LINE__,
"Invalid pseudo register number %d\n", regnum);
else if ((regnum >= DR0_REGNUM
&& regnum <= DR_LAST_REGNUM))
do_dr_register_info (current_gdbarch, gdb_stdout, regnum);
else if ((regnum >= DR0_C_REGNUM
&& regnum <= DR_LAST_C_REGNUM))
do_dr_c_register_info (regnum);
else if ((regnum >= FV0_REGNUM
&& regnum <= FV_LAST_REGNUM))
do_fv_register_info (current_gdbarch, gdb_stdout, regnum);
else if ((regnum >= FV0_C_REGNUM
&& regnum <= FV_LAST_C_REGNUM))
do_fv_c_register_info (regnum);
else if (regnum >= FPP0_REGNUM
&& regnum <= FPP_LAST_REGNUM)
do_fpp_register_info (regnum);
else if (regnum >= R0_C_REGNUM
&& regnum <= R_LAST_C_REGNUM)
/* FIXME, this function will not print the right format. */
do_r_c_register_info (regnum);
else if (regnum >= FP0_C_REGNUM
&& regnum <= FP_LAST_C_REGNUM)
/* This should work also for pseudoregs. */
sh_do_fp_register (current_gdbarch, gdb_stdout, regnum);
else if (regnum >= PC_C_REGNUM
&& regnum <= FPUL_C_REGNUM)
do_cr_c_register_info (regnum);
}
static void
sh_do_register (struct gdbarch *gdbarch, struct ui_file *file, int regnum)
{
char raw_buffer[MAX_REGISTER_SIZE];
fputs_filtered (REGISTER_NAME (regnum), file);
print_spaces_filtered (15 - strlen (REGISTER_NAME (regnum)), file);
/* Get the data in raw format. */
if (!frame_register_read (get_selected_frame (), regnum, raw_buffer))
fprintf_filtered (file, "*value not available*\n");
val_print (gdbarch_register_type (gdbarch, regnum), raw_buffer, 0, 0,
file, 'x', 1, 0, Val_pretty_default);
fprintf_filtered (file, "\t");
val_print (gdbarch_register_type (gdbarch, regnum), raw_buffer, 0, 0,
file, 0, 1, 0, Val_pretty_default);
fprintf_filtered (file, "\n");
}
static void
sh_print_register (struct gdbarch *gdbarch, struct ui_file *file, int regnum)
{
if (regnum < 0 || regnum >= NUM_REGS + NUM_PSEUDO_REGS)
internal_error (__FILE__, __LINE__,
"Invalid register number %d\n", regnum);
else if (regnum >= 0 && regnum < NUM_REGS)
{
if (TYPE_CODE (gdbarch_register_type (gdbarch, regnum)) == TYPE_CODE_FLT)
sh_do_fp_register (gdbarch, file, regnum); /* FP regs */
else
sh_do_register (gdbarch, file, regnum); /* All other regs */
}
else if (regnum < NUM_REGS + NUM_PSEUDO_REGS)
sh64_do_pseudo_register (regnum);
}
static void
sh_print_registers_info (struct gdbarch *gdbarch, struct ui_file *file,
struct frame_info *frame, int regnum, int fpregs)
{
if (regnum != -1) /* do one specified register */
{
if (*(REGISTER_NAME (regnum)) == '\0')
error ("Not a valid register for the current processor type");
sh_print_register (gdbarch, file, regnum);
}
else
/* do all (or most) registers */
{
regnum = 0;
while (regnum < NUM_REGS)
{
/* If the register name is empty, it is undefined for this
processor, so don't display anything. */
if (REGISTER_NAME (regnum) == NULL
|| *(REGISTER_NAME (regnum)) == '\0')
{
regnum++;
continue;
}
if (TYPE_CODE (gdbarch_register_type (gdbarch, regnum)) == TYPE_CODE_FLT)
{
if (fpregs)
{
/* true for "INFO ALL-REGISTERS" command */
sh_do_fp_register (gdbarch, file, regnum); /* FP regs */
regnum ++;
}
else
regnum += FP_LAST_REGNUM - FP0_REGNUM; /* skip FP regs */
}
else
{
sh_do_register (gdbarch, file, regnum); /* All other regs */
regnum++;
}
}
if (fpregs)
while (regnum < NUM_REGS + NUM_PSEUDO_REGS)
{
sh64_do_pseudo_register (regnum);
regnum++;
}
}
}
static void
sh_compact_do_registers_info (int regnum, int fpregs)
{
if (regnum != -1) /* do one specified register */
{
if (*(REGISTER_NAME (regnum)) == '\0')
error ("Not a valid register for the current processor type");
if (regnum >= 0 && regnum < R0_C_REGNUM)
error ("Not a valid register for the current processor mode.");
sh_print_register (current_gdbarch, gdb_stdout, regnum);
}
else
/* do all compact registers */
{
regnum = R0_C_REGNUM;
while (regnum < NUM_REGS + NUM_PSEUDO_REGS)
{
sh64_do_pseudo_register (regnum);
regnum++;
}
}
}
static void
sh64_do_registers_info (int regnum, int fpregs)
{
if (pc_is_isa32 (get_frame_pc (deprecated_selected_frame)))
sh_print_registers_info (current_gdbarch, gdb_stdout,
deprecated_selected_frame, regnum, fpregs);
else
sh_compact_do_registers_info (regnum, fpregs);
}
#ifdef SVR4_SHARED_LIBS
/* Fetch (and possibly build) an appropriate link_map_offsets structure
for native i386 linux targets using the struct offsets defined in
link.h (but without actual reference to that file).
This makes it possible to access i386-linux shared libraries from
a gdb that was not built on an i386-linux host (for cross debugging).
*/
struct link_map_offsets *
sh_linux_svr4_fetch_link_map_offsets (void)
{
static struct link_map_offsets lmo;
static struct link_map_offsets *lmp = 0;
if (lmp == 0)
{
lmp = &lmo;
lmo.r_debug_size = 8; /* 20 not actual size but all we need */
lmo.r_map_offset = 4;
lmo.r_map_size = 4;
lmo.link_map_size = 20; /* 552 not actual size but all we need */
lmo.l_addr_offset = 0;
lmo.l_addr_size = 4;
lmo.l_name_offset = 4;
lmo.l_name_size = 4;
lmo.l_next_offset = 12;
lmo.l_next_size = 4;
lmo.l_prev_offset = 16;
lmo.l_prev_size = 4;
}
return lmp;
}
#endif /* SVR4_SHARED_LIBS */
gdbarch_init_ftype sh64_gdbarch_init;
struct gdbarch *
sh64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
{
static LONGEST sh64_call_dummy_words[] = {0};
struct gdbarch *gdbarch;
struct gdbarch_tdep *tdep;
/* If there is already a candidate, use it. */
arches = gdbarch_list_lookup_by_info (arches, &info);
if (arches != NULL)
return arches->gdbarch;
/* None found, create a new architecture from the information
provided. */
tdep = XMALLOC (struct gdbarch_tdep);
gdbarch = gdbarch_alloc (&info, tdep);
/* NOTE: cagney/2002-12-06: This can be deleted when this arch is
ready to unwind the PC first (see frame.c:get_prev_frame()). */
set_gdbarch_deprecated_init_frame_pc (gdbarch, deprecated_init_frame_pc_default);
/* Determine the ABI */
if (info.abfd && bfd_get_arch_size (info.abfd) == 64)
{
/* If the ABI is the 64-bit one, it can only be sh-media. */
tdep->sh_abi = SH_ABI_64;
set_gdbarch_ptr_bit (gdbarch, 8 * TARGET_CHAR_BIT);
set_gdbarch_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
}
else
{
/* If the ABI is the 32-bit one it could be either media or
compact. */
tdep->sh_abi = SH_ABI_32;
set_gdbarch_ptr_bit (gdbarch, 4 * TARGET_CHAR_BIT);
set_gdbarch_long_bit (gdbarch, 4 * TARGET_CHAR_BIT);
}
set_gdbarch_short_bit (gdbarch, 2 * TARGET_CHAR_BIT);
set_gdbarch_int_bit (gdbarch, 4 * TARGET_CHAR_BIT);
set_gdbarch_long_long_bit (gdbarch, 8 * TARGET_CHAR_BIT);
set_gdbarch_float_bit (gdbarch, 4 * TARGET_CHAR_BIT);
set_gdbarch_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
set_gdbarch_long_double_bit (gdbarch, 8 * TARGET_CHAR_BIT);
set_gdbarch_sp_regnum (gdbarch, 15);
set_gdbarch_deprecated_fp_regnum (gdbarch, 14);
set_gdbarch_print_insn (gdbarch, gdb_print_insn_sh);
set_gdbarch_register_sim_regno (gdbarch, legacy_register_sim_regno);
set_gdbarch_write_pc (gdbarch, generic_target_write_pc);
set_gdbarch_skip_prologue (gdbarch, sh_skip_prologue);
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
set_gdbarch_deprecated_frameless_function_invocation (gdbarch, legacy_frameless_look_for_prologue);
set_gdbarch_believe_pcc_promotion (gdbarch, 1);
set_gdbarch_deprecated_frame_saved_pc (gdbarch, sh_frame_saved_pc);
set_gdbarch_deprecated_saved_pc_after_call (gdbarch, sh_saved_pc_after_call);
set_gdbarch_frame_align (gdbarch, sh_frame_align);
set_gdbarch_num_pseudo_regs (gdbarch, NUM_PSEUDO_REGS_SH_MEDIA + NUM_PSEUDO_REGS_SH_COMPACT);
set_gdbarch_fp0_regnum (gdbarch, SIM_SH64_FR0_REGNUM);
set_gdbarch_pc_regnum (gdbarch, 64);
/* The number of real registers is the same whether we are in
ISA16(compact) or ISA32(media). */
set_gdbarch_num_regs (gdbarch, SIM_SH64_NR_REGS);
set_gdbarch_deprecated_register_bytes (gdbarch,
((SIM_SH64_NR_FP_REGS + 1) * 4)
+ (SIM_SH64_NR_REGS - SIM_SH64_NR_FP_REGS -1) * 8);
set_gdbarch_register_name (gdbarch, sh64_register_name);
set_gdbarch_register_type (gdbarch, sh64_register_type);
set_gdbarch_deprecated_store_return_value (gdbarch, sh64_store_return_value);
set_gdbarch_deprecated_register_byte (gdbarch, sh64_register_byte);
set_gdbarch_pseudo_register_read (gdbarch, sh64_pseudo_register_read);
set_gdbarch_pseudo_register_write (gdbarch, sh64_pseudo_register_write);
set_gdbarch_deprecated_do_registers_info (gdbarch, sh64_do_registers_info);
set_gdbarch_deprecated_frame_init_saved_regs (gdbarch, sh64_nofp_frame_init_saved_regs);
set_gdbarch_breakpoint_from_pc (gdbarch, sh64_breakpoint_from_pc);
set_gdbarch_deprecated_call_dummy_words (gdbarch, sh64_call_dummy_words);
set_gdbarch_deprecated_sizeof_call_dummy_words (gdbarch, sizeof (sh64_call_dummy_words));
set_gdbarch_deprecated_init_extra_frame_info (gdbarch, sh64_init_extra_frame_info);
set_gdbarch_deprecated_frame_chain (gdbarch, sh64_frame_chain);
set_gdbarch_deprecated_get_saved_register (gdbarch, sh64_get_saved_register);
set_gdbarch_deprecated_extract_return_value (gdbarch, sh64_extract_return_value);
set_gdbarch_deprecated_push_arguments (gdbarch, sh64_push_arguments);
set_gdbarch_deprecated_push_return_address (gdbarch, sh64_push_return_address);
set_gdbarch_deprecated_dummy_write_sp (gdbarch, deprecated_write_sp);
set_gdbarch_deprecated_store_struct_return (gdbarch, sh64_store_struct_return);
set_gdbarch_deprecated_extract_struct_value_address (gdbarch, sh64_extract_struct_value_address);
set_gdbarch_use_struct_convention (gdbarch, sh64_use_struct_convention);
set_gdbarch_deprecated_pop_frame (gdbarch, sh64_pop_frame);
set_gdbarch_elf_make_msymbol_special (gdbarch,
sh64_elf_make_msymbol_special);
/* Hook in ABI-specific overrides, if they have been registered. */
gdbarch_init_osabi (info, gdbarch);
return gdbarch;
}
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