Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS 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.
GAS 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 GAS; see the file COPYING. If not, write to
the Free Software Foundation, 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
#include <stdio.h>
#include "as.h"
#include "bfd.h"
#include "subsegs.h"
#define DEFINE_TABLE
#include "opcodes/sh-opc.h"
#include "safe-ctype.h"
#include "struc-symbol.h"
#ifdef OBJ_ELF
#include "elf/sh.h"
#endif
#include "dwarf2dbg.h"
#include "dw2gencfi.h"
typedef struct
{
sh_arg_type type;
int reg;
expressionS immediate;
}
sh_operand_info;
const char comment_chars[] = "!";
const char line_separator_chars[] = ";";
const char line_comment_chars[] = "!#";
static void s_uses (int);
static void s_uacons (int);
#ifdef OBJ_ELF
static void sh_elf_cons (int);
symbolS *GOT_symbol;
#endif
static void
big (int ignore ATTRIBUTE_UNUSED)
{
if (! target_big_endian)
as_bad (_("directive .big encountered when option -big required"));
target_big_endian = 1;
}
static void
little (int ignore ATTRIBUTE_UNUSED)
{
if (target_big_endian)
as_bad (_("directive .little encountered when option -little required"));
target_big_endian = 0;
}
has to support. The fields are:
pseudo-op name without dot
function to call to execute this pseudo-op
Integer arg to pass to the function. */
const pseudo_typeS md_pseudo_table[] =
{
#ifdef OBJ_ELF
{"long", sh_elf_cons, 4},
{"int", sh_elf_cons, 4},
{"word", sh_elf_cons, 2},
{"short", sh_elf_cons, 2},
#else
{"int", cons, 4},
{"word", cons, 2},
#endif
{"big", big, 0},
{"form", listing_psize, 0},
{"little", little, 0},
{"heading", listing_title, 0},
{"import", s_ignore, 0},
{"page", listing_eject, 0},
{"program", s_ignore, 0},
{"uses", s_uses, 0},
{"uaword", s_uacons, 2},
{"ualong", s_uacons, 4},
{"uaquad", s_uacons, 8},
{"2byte", s_uacons, 2},
{"4byte", s_uacons, 4},
{"8byte", s_uacons, 8},
#ifdef HAVE_SH64
{"mode", s_sh64_mode, 0 },
{"isa", s_sh64_mode, 0 },
{"abi", s_sh64_abi, 0 },
{ "vtable_inherit", sh64_vtable_inherit, 0 },
{ "vtable_entry", sh64_vtable_entry, 0 },
#endif
{0, 0, 0}
};
int sh_relax;
int sh_small;
static int dont_adjust_reloc_32;
static int allow_dollar_register_prefix;
static unsigned int preset_target_arch;
accommodate the insns seen so far. */
static unsigned int valid_arch;
const char EXP_CHARS[] = "eE";
const char FLT_CHARS[] = "rRsSfFdDxXpP";
#define C(a,b) ENCODE_RELAX(a,b)
#define ENCODE_RELAX(what,length) (((what) << 4) + (length))
#define GET_WHAT(x) ((x>>4))
a marker. */
#define COND_JUMP 1
#define COND_JUMP_DELAY 2
#define UNCOND_JUMP 3
#ifdef HAVE_SH64
#define SH64PCREL16_32 4
#define SH64PCREL16_64 5
the label. */
#define SH64PCREL16PT_32 6
#define SH64PCREL16PT_64 7
#define MOVI_IMM_32 8
#define MOVI_IMM_32_PCREL 9
#define MOVI_IMM_64 10
#define MOVI_IMM_64_PCREL 11
#define END 12
#else
#define END 4
#endif
#define UNDEF_DISP 0
#define COND8 1
#define COND12 2
#define COND32 3
#define UNDEF_WORD_DISP 4
#define UNCOND12 1
#define UNCOND32 2
#ifdef HAVE_SH64
#define UNDEF_SH64PCREL 0
#define SH64PCREL16 1
#define SH64PCREL32 2
#define SH64PCREL48 3
#define SH64PCREL64 4
#define SH64PCRELPLT 5
#define UNDEF_MOVI 0
#define MOVI_16 1
#define MOVI_32 2
#define MOVI_48 3
#define MOVI_64 4
#define MOVI_PLT 5
#define MOVI_GOTOFF 6
#define MOVI_GOTPC 7
#endif
four, thus all minimum and maximum values have 4 added to them. */
#define COND8_F 258
#define COND8_M -252
#define COND8_LENGTH 2
two more bytes to account for it. */
#define COND12_F 4100
#define COND12_M -4090
#define COND12_LENGTH 6
#define COND12_DELAY_LENGTH 4
since this relocation type is not supported yet. */
#define COND32_F (1<<30)
#define COND32_M -(1<<30)
#define COND32_LENGTH 14
#define UNCOND12_F 4098
#define UNCOND12_M -4092
#define UNCOND12_LENGTH 2
since this relocation type is not supported yet. */
#define UNCOND32_F (1<<30)
#define UNCOND32_M -(1<<30)
#define UNCOND32_LENGTH 14
#ifdef HAVE_SH64
TRd" as is the current insn, so no extra length. Note that the "reach"
is calculated from the address *after* that insn, but the offset in the
insn is calculated from the beginning of the insn. We also need to
take into account the implicit 1 coded as the "A" in PTA when counting
forward. If PTB reaches an odd address, we trap that as an error
elsewhere, so we don't have to have different relaxation entries. We
don't add a one to the negative range, since PTB would then have the
farthest backward-reaching value skipped, not generated at relaxation. */
#define SH64PCREL16_F (32767 * 4 - 4 + 1)
#define SH64PCREL16_M (-32768 * 4 - 4)
#define SH64PCREL16_LENGTH 0
MOVI ((label - datalabel Ln) >> 16) & 65535, R25
SHORI (label - datalabel Ln) & 65535, R25
Ln:
PTREL R25,TRd
which means two extra insns, 8 extra bytes. This is the limit for the
32-bit ABI.
The expressions look a bit bad since we have to adjust this to avoid overflow on a
32-bit host. */
#define SH64PCREL32_F ((((long) 1 << 30) - 1) * 2 + 1 - 4)
#define SH64PCREL32_LENGTH (2 * 4)
expansion. */
#if BFD_HOST_64BIT_LONG
host. */
#define SH64PCREL32_M (((long) -1 << 30) * 2 - 4)
#define SH64PCREL48_F ((((long) 1 << 47) - 1) - 4)
#define SH64PCREL48_M (((long) -1 << 47) - 4)
#define SH64PCREL48_LENGTH (3 * 4)
#else
in reach to the 32-bit state. Note that we have a slightly incorrect
reach, but the correct one above will overflow a 32-bit number. */
#define SH64PCREL32_M (((long) -1 << 30) * 2)
#define SH64PCREL48_F SH64PCREL32_F
#define SH64PCREL48_M SH64PCREL32_M
#define SH64PCREL48_LENGTH (3 * 4)
#endif
+ PTREL sequence. */
#define SH64PCREL64_LENGTH (4 * 4)
SH64PCREL expansions. The PCREL one is similar, but the other has no
pc-relative reach; it must be fully expanded in
shmedia_md_estimate_size_before_relax. */
#define MOVI_16_LENGTH 0
#define MOVI_16_F (32767 - 4)
#define MOVI_16_M (-32768 - 4)
#define MOVI_32_LENGTH 4
#define MOVI_32_F ((((long) 1 << 30) - 1) * 2 + 1 - 4)
#define MOVI_48_LENGTH 8
#if BFD_HOST_64BIT_LONG
host. */
#define MOVI_32_M (((long) -1 << 30) * 2 - 4)
#define MOVI_48_F ((((long) 1 << 47) - 1) - 4)
#define MOVI_48_M (((long) -1 << 47) - 4)
#else
in reach to the 32-bit state. Note that we have a slightly incorrect
reach, but the correct one above will overflow a 32-bit number. */
#define MOVI_32_M (((long) -1 << 30) * 2)
#define MOVI_48_F MOVI_32_F
#define MOVI_48_M MOVI_32_M
#endif
#define MOVI_64_LENGTH 12
#endif
#define EMPTY { 0, 0, 0, 0 }
const relax_typeS md_relax_table[C (END, 0)] = {
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
EMPTY,
{ COND8_F, COND8_M, COND8_LENGTH, C (COND_JUMP, COND12) },
{ COND12_F, COND12_M, COND12_LENGTH, C (COND_JUMP, COND32), },
{ COND32_F, COND32_M, COND32_LENGTH, 0, },
{ 0, 0, COND32_LENGTH, 0, },
EMPTY, EMPTY, EMPTY,
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
EMPTY,
{ COND8_F, COND8_M, COND8_LENGTH, C (COND_JUMP_DELAY, COND12) },
{ COND12_F, COND12_M, COND12_DELAY_LENGTH, C (COND_JUMP_DELAY, COND32), },
{ COND32_F, COND32_M, COND32_LENGTH, 0, },
{ 0, 0, COND32_LENGTH, 0, },
EMPTY, EMPTY, EMPTY,
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
EMPTY,
{ UNCOND12_F, UNCOND12_M, UNCOND12_LENGTH, C (UNCOND_JUMP, UNCOND32), },
{ UNCOND32_F, UNCOND32_M, UNCOND32_LENGTH, 0, },
EMPTY,
{ 0, 0, UNCOND32_LENGTH, 0, },
EMPTY, EMPTY, EMPTY,
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
#ifdef HAVE_SH64
EMPTY,
{ SH64PCREL16_F, SH64PCREL16_M, SH64PCREL16_LENGTH, C (SH64PCREL16_32, SH64PCREL32) },
{ 0, 0, SH64PCREL32_LENGTH, 0 },
EMPTY, EMPTY,
{ 0, 0, SH64PCREL32_LENGTH, 0 },
EMPTY, EMPTY,
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
EMPTY,
{ SH64PCREL16_F, SH64PCREL16_M, SH64PCREL16_LENGTH, C (SH64PCREL16_64, SH64PCREL32) },
{ SH64PCREL32_F, SH64PCREL32_M, SH64PCREL32_LENGTH, C (SH64PCREL16_64, SH64PCREL48) },
{ SH64PCREL48_F, SH64PCREL48_M, SH64PCREL48_LENGTH, C (SH64PCREL16_64, SH64PCREL64) },
{ 0, 0, SH64PCREL64_LENGTH, 0 },
{ 0, 0, SH64PCREL64_LENGTH, 0 },
EMPTY, EMPTY,
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
EMPTY,
{ SH64PCREL16_F, SH64PCREL16_M, SH64PCREL16_LENGTH, C (SH64PCREL16PT_32, SH64PCREL32) },
{ 0, 0, SH64PCREL32_LENGTH, 0 },
EMPTY, EMPTY,
{ 0, 0, SH64PCREL32_LENGTH, 0 },
EMPTY, EMPTY,
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
EMPTY,
{ SH64PCREL16_F, SH64PCREL16_M, SH64PCREL16_LENGTH, C (SH64PCREL16PT_64, SH64PCREL32) },
{ SH64PCREL32_F,
SH64PCREL32_M,
SH64PCREL32_LENGTH,
C (SH64PCREL16PT_64, SH64PCREL48) },
{ SH64PCREL48_F, SH64PCREL48_M, SH64PCREL48_LENGTH, C (SH64PCREL16PT_64, SH64PCREL64) },
{ 0, 0, SH64PCREL64_LENGTH, 0 },
{ 0, 0, SH64PCREL64_LENGTH, 0},
EMPTY, EMPTY,
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
{ 0, 0, MOVI_32_LENGTH, 0 },
{ MOVI_16_F, MOVI_16_M, MOVI_16_LENGTH, C (MOVI_IMM_32, MOVI_32) },
{ MOVI_32_F, MOVI_32_M, MOVI_32_LENGTH, 0 },
EMPTY, EMPTY, EMPTY,
{ 0, 0, MOVI_32_LENGTH, 0 },
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
EMPTY,
{ MOVI_16_F, MOVI_16_M, MOVI_16_LENGTH, C (MOVI_IMM_32_PCREL, MOVI_32) },
{ 0, 0, MOVI_32_LENGTH, 0 },
EMPTY, EMPTY,
{ 0, 0, MOVI_32_LENGTH, 0 },
EMPTY,
{ 0, 0, MOVI_32_LENGTH, 0 },
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
{ 0, 0, MOVI_64_LENGTH, 0 },
{ MOVI_16_F, MOVI_16_M, MOVI_16_LENGTH, C (MOVI_IMM_64, MOVI_32) },
{ MOVI_32_F, MOVI_32_M, MOVI_32_LENGTH, C (MOVI_IMM_64, MOVI_48) },
{ MOVI_48_F, MOVI_48_M, MOVI_48_LENGTH, C (MOVI_IMM_64, MOVI_64) },
{ 0, 0, MOVI_64_LENGTH, 0 },
EMPTY,
{ 0, 0, MOVI_64_LENGTH, 0 },
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
EMPTY,
{ MOVI_16_F, MOVI_16_M, MOVI_16_LENGTH, C (MOVI_IMM_64_PCREL, MOVI_32) },
{ MOVI_32_F, MOVI_32_M, MOVI_32_LENGTH, C (MOVI_IMM_64_PCREL, MOVI_48) },
{ MOVI_48_F, MOVI_48_M, MOVI_48_LENGTH, C (MOVI_IMM_64_PCREL, MOVI_64) },
{ 0, 0, MOVI_64_LENGTH, 0 },
{ 0, 0, MOVI_64_LENGTH, 0 },
EMPTY,
{ 0, 0, MOVI_64_LENGTH, 0 },
EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY, EMPTY,
#endif
};
#undef EMPTY
static struct hash_control *opcode_hash_control;
#ifdef OBJ_ELF
inline static int
sh_PIC_related_p (symbolS *sym)
{
expressionS *exp;
if (! sym)
return 0;
if (sym == GOT_symbol)
return 1;
#ifdef HAVE_SH64
if (sh_PIC_related_p (*symbol_get_tc (sym)))
return 1;
#endif
exp = symbol_get_value_expression (sym);
return (exp->X_op == O_PIC_reloc
|| sh_PIC_related_p (exp->X_add_symbol)
|| sh_PIC_related_p (exp->X_op_symbol));
}
expression, that may be rearranged. */
static int
sh_check_fixup (expressionS *main_exp, bfd_reloc_code_real_type *r_type_p)
{
expressionS *exp = main_exp;
f@PLT + . - (.LPCS# + 2)
but we'd rather be able to handle this as a PIC-related reference
plus/minus a symbol. However, gas' parser gives us:
O_subtract (O_add (f@PLT, .), .LPCS#+2)
so we attempt to transform this into:
O_subtract (f@PLT, O_subtract (.LPCS#+2, .))
which we can handle simply below. */
if (exp->X_op == O_subtract)
{
if (sh_PIC_related_p (exp->X_op_symbol))
return 1;
exp = symbol_get_value_expression (exp->X_add_symbol);
if (exp && sh_PIC_related_p (exp->X_op_symbol))
return 1;
if (exp && exp->X_op == O_add
&& sh_PIC_related_p (exp->X_add_symbol))
{
symbolS *sym = exp->X_add_symbol;
exp->X_op = O_subtract;
exp->X_add_symbol = main_exp->X_op_symbol;
main_exp->X_op_symbol = main_exp->X_add_symbol;
main_exp->X_add_symbol = sym;
main_exp->X_add_number += exp->X_add_number;
exp->X_add_number = 0;
}
exp = main_exp;
}
else if (exp->X_op == O_add && sh_PIC_related_p (exp->X_op_symbol))
return 1;
if (exp->X_op == O_symbol || exp->X_op == O_add || exp->X_op == O_subtract)
{
#ifdef HAVE_SH64
if (exp->X_add_symbol
&& (exp->X_add_symbol == GOT_symbol
|| (GOT_symbol
&& *symbol_get_tc (exp->X_add_symbol) == GOT_symbol)))
{
switch (*r_type_p)
{
case BFD_RELOC_SH_IMM_LOW16:
*r_type_p = BFD_RELOC_SH_GOTPC_LOW16;
break;
case BFD_RELOC_SH_IMM_MEDLOW16:
*r_type_p = BFD_RELOC_SH_GOTPC_MEDLOW16;
break;
case BFD_RELOC_SH_IMM_MEDHI16:
*r_type_p = BFD_RELOC_SH_GOTPC_MEDHI16;
break;
case BFD_RELOC_SH_IMM_HI16:
*r_type_p = BFD_RELOC_SH_GOTPC_HI16;
break;
case BFD_RELOC_NONE:
case BFD_RELOC_UNUSED:
*r_type_p = BFD_RELOC_SH_GOTPC;
break;
default:
abort ();
}
return 0;
}
#else
if (exp->X_add_symbol && exp->X_add_symbol == GOT_symbol)
{
*r_type_p = BFD_RELOC_SH_GOTPC;
return 0;
}
#endif
exp = symbol_get_value_expression (exp->X_add_symbol);
if (! exp)
return 0;
}
if (exp->X_op == O_PIC_reloc)
{
#ifdef HAVE_SH64
switch (*r_type_p)
{
case BFD_RELOC_NONE:
case BFD_RELOC_UNUSED:
*r_type_p = exp->X_md;
break;
case BFD_RELOC_SH_IMM_LOW16:
switch (exp->X_md)
{
case BFD_RELOC_32_GOTOFF:
*r_type_p = BFD_RELOC_SH_GOTOFF_LOW16;
break;
case BFD_RELOC_SH_GOTPLT32:
*r_type_p = BFD_RELOC_SH_GOTPLT_LOW16;
break;
case BFD_RELOC_32_GOT_PCREL:
*r_type_p = BFD_RELOC_SH_GOT_LOW16;
break;
case BFD_RELOC_32_PLT_PCREL:
*r_type_p = BFD_RELOC_SH_PLT_LOW16;
break;
default:
abort ();
}
break;
case BFD_RELOC_SH_IMM_MEDLOW16:
switch (exp->X_md)
{
case BFD_RELOC_32_GOTOFF:
*r_type_p = BFD_RELOC_SH_GOTOFF_MEDLOW16;
break;
case BFD_RELOC_SH_GOTPLT32:
*r_type_p = BFD_RELOC_SH_GOTPLT_MEDLOW16;
break;
case BFD_RELOC_32_GOT_PCREL:
*r_type_p = BFD_RELOC_SH_GOT_MEDLOW16;
break;
case BFD_RELOC_32_PLT_PCREL:
*r_type_p = BFD_RELOC_SH_PLT_MEDLOW16;
break;
default:
abort ();
}
break;
case BFD_RELOC_SH_IMM_MEDHI16:
switch (exp->X_md)
{
case BFD_RELOC_32_GOTOFF:
*r_type_p = BFD_RELOC_SH_GOTOFF_MEDHI16;
break;
case BFD_RELOC_SH_GOTPLT32:
*r_type_p = BFD_RELOC_SH_GOTPLT_MEDHI16;
break;
case BFD_RELOC_32_GOT_PCREL:
*r_type_p = BFD_RELOC_SH_GOT_MEDHI16;
break;
case BFD_RELOC_32_PLT_PCREL:
*r_type_p = BFD_RELOC_SH_PLT_MEDHI16;
break;
default:
abort ();
}
break;
case BFD_RELOC_SH_IMM_HI16:
switch (exp->X_md)
{
case BFD_RELOC_32_GOTOFF:
*r_type_p = BFD_RELOC_SH_GOTOFF_HI16;
break;
case BFD_RELOC_SH_GOTPLT32:
*r_type_p = BFD_RELOC_SH_GOTPLT_HI16;
break;
case BFD_RELOC_32_GOT_PCREL:
*r_type_p = BFD_RELOC_SH_GOT_HI16;
break;
case BFD_RELOC_32_PLT_PCREL:
*r_type_p = BFD_RELOC_SH_PLT_HI16;
break;
default:
abort ();
}
break;
default:
abort ();
}
#else
*r_type_p = exp->X_md;
#endif
if (exp == main_exp)
exp->X_op = O_symbol;
else
{
main_exp->X_add_symbol = exp->X_add_symbol;
main_exp->X_add_number += exp->X_add_number;
}
}
else
return (sh_PIC_related_p (exp->X_add_symbol)
|| sh_PIC_related_p (exp->X_op_symbol));
return 0;
}
void
sh_cons_fix_new (fragS *frag, int off, int size, expressionS *exp)
{
bfd_reloc_code_real_type r_type = BFD_RELOC_UNUSED;
if (sh_check_fixup (exp, &r_type))
as_bad (_("Invalid PIC expression."));
if (r_type == BFD_RELOC_UNUSED)
switch (size)
{
case 1:
r_type = BFD_RELOC_8;
break;
case 2:
r_type = BFD_RELOC_16;
break;
case 4:
r_type = BFD_RELOC_32;
break;
#ifdef HAVE_SH64
case 8:
r_type = BFD_RELOC_64;
break;
#endif
default:
goto error;
}
else if (size != 4)
{
error:
as_bad (_("unsupported BFD relocation size %u"), size);
r_type = BFD_RELOC_UNUSED;
}
fix_new_exp (frag, off, size, exp, 0, r_type);
}
suffixes such as @GOT, @GOTOFF and @PLT, that generate
machine-specific relocation types. So we must define it here. */
static void
sh_elf_cons (register int nbytes)
{
expressionS exp;
#ifdef HAVE_SH64
sh64_update_contents_mark (TRUE);
sh64_flag_output ();
#endif
if (is_it_end_of_statement ())
{
demand_empty_rest_of_line ();
return;
}
#ifdef md_cons_align
md_cons_align (nbytes);
#endif
do
{
expression (&exp);
emit_expr (&exp, (unsigned int) nbytes);
}
while (*input_line_pointer++ == ',');
input_line_pointer--;
if (*input_line_pointer == '#' || *input_line_pointer == '!')
{
while (! is_end_of_line[(unsigned char) *input_line_pointer++]);
}
else
demand_empty_rest_of_line ();
}
#endif
set up all the tables, etc that the MD part of the assembler needs. */
void
md_begin (void)
{
const sh_opcode_info *opcode;
char *prev_name = "";
unsigned int target_arch;
target_arch
= preset_target_arch ? preset_target_arch : arch_sh_up & ~arch_sh_has_dsp;
valid_arch = target_arch;
#ifdef HAVE_SH64
shmedia_md_begin ();
#endif
opcode_hash_control = hash_new ();
for (opcode = sh_table; opcode->name; opcode++)
{
if (strcmp (prev_name, opcode->name) != 0)
{
if (!SH_MERGE_ARCH_SET_VALID (opcode->arch, target_arch))
continue;
prev_name = opcode->name;
hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
}
}
}
static int reg_m;
static int reg_n;
static int reg_x, reg_y;
static int reg_efg;
static int reg_b;
#define IDENT_CHAR(c) (ISALNUM (c) || (c) == '_')
static unsigned int
parse_reg_without_prefix (char *src, int *mode, int *reg)
{
char l0 = TOLOWER (src[0]);
char l1 = l0 ? TOLOWER (src[1]) : 0;
make sure that we won't accidentally recognize a symbol name such as
'sram' or sr_ram as being a reference to the register 'sr'. */
if (l0 == 'r')
{
if (l1 == '1')
{
if (src[2] >= '0' && src[2] <= '5'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_REG_N;
*reg = 10 + src[2] - '0';
return 3;
}
}
if (l1 >= '0' && l1 <= '9'
&& ! IDENT_CHAR ((unsigned char) src[2]))
{
*mode = A_REG_N;
*reg = (l1 - '0');
return 2;
}
if (l1 >= '0' && l1 <= '7' && strncasecmp (&src[2], "_bank", 5) == 0
&& ! IDENT_CHAR ((unsigned char) src[7]))
{
*mode = A_REG_B;
*reg = (l1 - '0');
return 7;
}
if (l1 == 'e' && ! IDENT_CHAR ((unsigned char) src[2]))
{
*mode = A_RE;
return 2;
}
if (l1 == 's' && ! IDENT_CHAR ((unsigned char) src[2]))
{
*mode = A_RS;
return 2;
}
}
if (l0 == 'a')
{
if (l1 == '0')
{
if (! IDENT_CHAR ((unsigned char) src[2]))
{
*mode = DSP_REG_N;
*reg = A_A0_NUM;
return 2;
}
if (TOLOWER (src[2]) == 'g' && ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = DSP_REG_N;
*reg = A_A0G_NUM;
return 3;
}
}
if (l1 == '1')
{
if (! IDENT_CHAR ((unsigned char) src[2]))
{
*mode = DSP_REG_N;
*reg = A_A1_NUM;
return 2;
}
if (TOLOWER (src[2]) == 'g' && ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = DSP_REG_N;
*reg = A_A1G_NUM;
return 3;
}
}
if (l1 == 'x' && src[2] >= '0' && src[2] <= '1'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_REG_N;
*reg = 4 + (l1 - '0');
return 3;
}
if (l1 == 'y' && src[2] >= '0' && src[2] <= '1'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_REG_N;
*reg = 6 + (l1 - '0');
return 3;
}
if (l1 == 's' && src[2] >= '0' && src[2] <= '3'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
int n = l1 - '0';
*mode = A_REG_N;
*reg = n | ((~n & 2) << 1);
return 3;
}
}
if (l0 == 'i' && l1 && ! IDENT_CHAR ((unsigned char) src[2]))
{
if (l1 == 's')
{
*mode = A_REG_N;
*reg = 8;
return 2;
}
if (l1 == 'x')
{
*mode = A_REG_N;
*reg = 8;
return 2;
}
if (l1 == 'y')
{
*mode = A_REG_N;
*reg = 9;
return 2;
}
}
if (l0 == 'x' && l1 >= '0' && l1 <= '1'
&& ! IDENT_CHAR ((unsigned char) src[2]))
{
*mode = DSP_REG_N;
*reg = A_X0_NUM + l1 - '0';
return 2;
}
if (l0 == 'y' && l1 >= '0' && l1 <= '1'
&& ! IDENT_CHAR ((unsigned char) src[2]))
{
*mode = DSP_REG_N;
*reg = A_Y0_NUM + l1 - '0';
return 2;
}
if (l0 == 'm' && l1 >= '0' && l1 <= '1'
&& ! IDENT_CHAR ((unsigned char) src[2]))
{
*mode = DSP_REG_N;
*reg = l1 == '0' ? A_M0_NUM : A_M1_NUM;
return 2;
}
if (l0 == 's'
&& l1 == 's'
&& TOLOWER (src[2]) == 'r' && ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_SSR;
return 3;
}
if (l0 == 's' && l1 == 'p' && TOLOWER (src[2]) == 'c'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_SPC;
return 3;
}
if (l0 == 's' && l1 == 'g' && TOLOWER (src[2]) == 'r'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_SGR;
return 3;
}
if (l0 == 'd' && l1 == 's' && TOLOWER (src[2]) == 'r'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_DSR;
return 3;
}
if (l0 == 'd' && l1 == 'b' && TOLOWER (src[2]) == 'r'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_DBR;
return 3;
}
if (l0 == 's' && l1 == 'r' && ! IDENT_CHAR ((unsigned char) src[2]))
{
*mode = A_SR;
return 2;
}
if (l0 == 's' && l1 == 'p' && ! IDENT_CHAR ((unsigned char) src[2]))
{
*mode = A_REG_N;
*reg = 15;
return 2;
}
if (l0 == 'p' && l1 == 'r' && ! IDENT_CHAR ((unsigned char) src[2]))
{
*mode = A_PR;
return 2;
}
if (l0 == 'p' && l1 == 'c' && ! IDENT_CHAR ((unsigned char) src[2]))
{
and use an uninitialized immediate. */
*mode = A_PC;
return 2;
}
if (l0 == 'g' && l1 == 'b' && TOLOWER (src[2]) == 'r'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_GBR;
return 3;
}
if (l0 == 'v' && l1 == 'b' && TOLOWER (src[2]) == 'r'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_VBR;
return 3;
}
if (l0 == 't' && l1 == 'b' && TOLOWER (src[2]) == 'r'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_TBR;
return 3;
}
if (l0 == 'm' && l1 == 'a' && TOLOWER (src[2]) == 'c'
&& ! IDENT_CHAR ((unsigned char) src[4]))
{
if (TOLOWER (src[3]) == 'l')
{
*mode = A_MACL;
return 4;
}
if (TOLOWER (src[3]) == 'h')
{
*mode = A_MACH;
return 4;
}
}
if (l0 == 'm' && l1 == 'o' && TOLOWER (src[2]) == 'd'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = A_MOD;
return 3;
}
if (l0 == 'f' && l1 == 'r')
{
if (src[2] == '1')
{
if (src[3] >= '0' && src[3] <= '5'
&& ! IDENT_CHAR ((unsigned char) src[4]))
{
*mode = F_REG_N;
*reg = 10 + src[3] - '0';
return 4;
}
}
if (src[2] >= '0' && src[2] <= '9'
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = F_REG_N;
*reg = (src[2] - '0');
return 3;
}
}
if (l0 == 'd' && l1 == 'r')
{
if (src[2] == '1')
{
if (src[3] >= '0' && src[3] <= '4' && ! ((src[3] - '0') & 1)
&& ! IDENT_CHAR ((unsigned char) src[4]))
{
*mode = D_REG_N;
*reg = 10 + src[3] - '0';
return 4;
}
}
if (src[2] >= '0' && src[2] <= '8' && ! ((src[2] - '0') & 1)
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = D_REG_N;
*reg = (src[2] - '0');
return 3;
}
}
if (l0 == 'x' && l1 == 'd')
{
if (src[2] == '1')
{
if (src[3] >= '0' && src[3] <= '4' && ! ((src[3] - '0') & 1)
&& ! IDENT_CHAR ((unsigned char) src[4]))
{
*mode = X_REG_N;
*reg = 11 + src[3] - '0';
return 4;
}
}
if (src[2] >= '0' && src[2] <= '8' && ! ((src[2] - '0') & 1)
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = X_REG_N;
*reg = (src[2] - '0') + 1;
return 3;
}
}
if (l0 == 'f' && l1 == 'v')
{
if (src[2] == '1'&& src[3] == '2' && ! IDENT_CHAR ((unsigned char) src[4]))
{
*mode = V_REG_N;
*reg = 12;
return 4;
}
if ((src[2] == '0' || src[2] == '4' || src[2] == '8')
&& ! IDENT_CHAR ((unsigned char) src[3]))
{
*mode = V_REG_N;
*reg = (src[2] - '0');
return 3;
}
}
if (l0 == 'f' && l1 == 'p' && TOLOWER (src[2]) == 'u'
&& TOLOWER (src[3]) == 'l'
&& ! IDENT_CHAR ((unsigned char) src[4]))
{
*mode = FPUL_N;
return 4;
}
if (l0 == 'f' && l1 == 'p' && TOLOWER (src[2]) == 's'
&& TOLOWER (src[3]) == 'c'
&& TOLOWER (src[4]) == 'r' && ! IDENT_CHAR ((unsigned char) src[5]))
{
*mode = FPSCR_N;
return 5;
}
if (l0 == 'x' && l1 == 'm' && TOLOWER (src[2]) == 't'
&& TOLOWER (src[3]) == 'r'
&& TOLOWER (src[4]) == 'x' && ! IDENT_CHAR ((unsigned char) src[5]))
{
*mode = XMTRX_M4;
return 5;
}
return 0;
}
$-prefixed register names if enabled by the user. */
static unsigned int
parse_reg (char *src, int *mode, int *reg)
{
unsigned int prefix;
unsigned int consumed;
if (src[0] == '$')
{
if (allow_dollar_register_prefix)
{
src ++;
prefix = 1;
}
else
return 0;
}
else
prefix = 0;
consumed = parse_reg_without_prefix (src, mode, reg);
if (consumed == 0)
return 0;
return consumed + prefix;
}
static char *
parse_exp (char *s, sh_operand_info *op)
{
char *save;
char *new;
save = input_line_pointer;
input_line_pointer = s;
expression (&op->immediate);
if (op->immediate.X_op == O_absent)
as_bad (_("missing operand"));
#ifdef OBJ_ELF
else if (op->immediate.X_op == O_PIC_reloc
|| sh_PIC_related_p (op->immediate.X_add_symbol)
|| sh_PIC_related_p (op->immediate.X_op_symbol))
as_bad (_("misplaced PIC operand"));
#endif
new = input_line_pointer;
input_line_pointer = save;
return new;
}
Rn Register direct
@Rn Register indirect
@Rn+ Autoincrement
@-Rn Autodecrement
@(disp:4,Rn)
@(disp:8,GBR)
@(disp:8,PC)
@(R0,Rn)
@(R0,GBR)
disp:8
disp:12
#imm8
pr, gbr, vbr, macl, mach
*/
static char *
parse_at (char *src, sh_operand_info *op)
{
int len;
int mode;
src++;
if (src[0] == '@')
{
src = parse_at (src, op);
if (op->type == A_DISP_TBR)
op->type = A_DISP2_TBR;
else
as_bad (_("illegal double indirection"));
}
else if (src[0] == '-')
{
src++;
len = parse_reg (src, &mode, &(op->reg));
if (mode != A_REG_N)
as_bad (_("illegal register after @-"));
op->type = A_DEC_N;
src += len;
}
else if (src[0] == '(')
{
@(r0, rn). */
src++;
len = parse_reg (src, &mode, &(op->reg));
if (len && mode == A_REG_N)
{
src += len;
if (op->reg != 0)
{
as_bad (_("must be @(r0,...)"));
}
if (src[0] == ',')
{
src++;
len = parse_reg (src, &mode, &(op->reg));
}
else
{
len = 0;
}
if (len)
{
if (mode == A_GBR)
{
op->type = A_R0_GBR;
}
else if (mode == A_REG_N)
{
op->type = A_IND_R0_REG_N;
}
else
{
as_bad (_("syntax error in @(r0,...)"));
}
}
else
{
as_bad (_("syntax error in @(r0...)"));
}
}
else
{
src = parse_exp (src, op);
if (src[0] == ',')
src++;
len = parse_reg (src, &mode, &op->reg);
if (len)
{
if (mode == A_REG_N)
{
op->type = A_DISP_REG_N;
}
else if (mode == A_GBR)
{
op->type = A_DISP_GBR;
}
else if (mode == A_TBR)
{
op->type = A_DISP_TBR;
}
else if (mode == A_PC)
{
no matter if expr is a constant, or a more complex
expression, e.g. sym-. or sym1-sym2.
However, we also used to accept @(sym,pc)
as addressing sym, i.e. meaning the same as plain sym.
Some existing code does use the @(sym,pc) syntax, so
we give it the old semantics for now, but warn about
its use, so that users have some time to fix their code.
Note that due to this backward compatibility hack,
we'll get unexpected results when @(offset, pc) is used,
and offset is a symbol that is set later to an an address
difference, or an external symbol that is set to an
address difference in another source file, so we want to
eventually remove it. */
if (op->immediate.X_op == O_symbol)
{
op->type = A_DISP_PC;
as_warn (_("Deprecated syntax."));
}
else
{
op->type = A_DISP_PC_ABS;
make the correction here. */
op->immediate.X_add_number -= 4;
}
}
else
{
as_bad (_("syntax error in @(disp,[Rn, gbr, pc])"));
}
}
else
{
as_bad (_("syntax error in @(disp,[Rn, gbr, pc])"));
}
}
src += len;
if (src[0] != ')')
as_bad (_("expecting )"));
else
src++;
}
else
{
src += parse_reg (src, &mode, &(op->reg));
if (mode != A_REG_N)
as_bad (_("illegal register after @"));
if (src[0] == '+')
{
char l0, l1;
src++;
l0 = TOLOWER (src[0]);
l1 = TOLOWER (src[1]);
if ((l0 == 'r' && l1 == '8')
|| (l0 == 'i' && (l1 == 'x' || l1 == 's')))
{
src += 2;
op->type = AX_PMOD_N;
}
else if ( (l0 == 'r' && l1 == '9')
|| (l0 == 'i' && l1 == 'y'))
{
src += 2;
op->type = AY_PMOD_N;
}
else
op->type = A_INC_N;
}
else
op->type = A_IND_N;
}
return src;
}
static void
get_operand (char **ptr, sh_operand_info *op)
{
char *src = *ptr;
int mode = -1;
unsigned int len;
if (src[0] == '#')
{
src++;
*ptr = parse_exp (src, op);
op->type = A_IMM;
return;
}
else if (src[0] == '@')
{
*ptr = parse_at (src, op);
return;
}
len = parse_reg (src, &mode, &(op->reg));
if (len)
{
*ptr = src + len;
op->type = mode;
return;
}
else
{
*ptr = parse_exp (src, op);
op->type = A_DISP_PC;
return;
}
}
static char *
get_operands (sh_opcode_info *info, char *args, sh_operand_info *operand)
{
char *ptr = args;
if (info->arg[0])
{
after the first argument; we may be called multiple times
from assemble_ppi, so don't insist on finding whitespace here. */
if (*ptr == ' ')
ptr++;
get_operand (&ptr, operand + 0);
if (info->arg[1])
{
if (*ptr == ',')
{
ptr++;
}
get_operand (&ptr, operand + 1);
the type of the first operand. We handle this by having the
three-operand version first and reducing the number of operands
parsed to two if we see that the first operand is an immediate.
This works because no insn with three operands has an immediate
as first operand. */
if (info->arg[2] && operand[0].type != A_IMM)
{
if (*ptr == ',')
{
ptr++;
}
get_operand (&ptr, operand + 2);
}
else
{
operand[2].type = 0;
}
}
else
{
operand[1].type = 0;
operand[2].type = 0;
}
}
else
{
operand[0].type = 0;
operand[1].type = 0;
operand[2].type = 0;
}
return ptr;
}
addressing modes, return the opcode which matches the opcodes
provided. */
static sh_opcode_info *
get_specific (sh_opcode_info *opcode, sh_operand_info *operands)
{
sh_opcode_info *this_try = opcode;
char *name = opcode->name;
int n = 0;
while (opcode->name)
{
this_try = opcode++;
if ((this_try->name != name) && (strcmp (this_try->name, name) != 0))
{
opcodes with the same name. */
return 0;
}
the user - since an arg test will often fail on the same arg
again and again, we'll try and test the last failing arg the
first on each opcode try. */
for (n = 0; this_try->arg[n]; n++)
{
sh_operand_info *user = operands + n;
sh_arg_type arg = this_try->arg[n];
if (SH_MERGE_ARCH_SET_VALID (valid_arch, arch_sh2a_nofpu_up)
&& ( arg == A_DISP_REG_M
|| arg == A_DISP_REG_N))
{
int opf;
long val = user->immediate.X_add_number;
for (opf = 0; opf < 4; opf ++)
switch (this_try->nibbles[opf])
{
case IMM0_4:
case IMM1_4:
if (val < 0 || val > 15)
goto fail;
break;
case IMM0_4BY2:
case IMM1_4BY2:
if (val < 0 || val > 15 * 2)
goto fail;
break;
case IMM0_4BY4:
case IMM1_4BY4:
if (val < 0 || val > 15 * 4)
goto fail;
break;
default:
break;
}
}
switch (arg)
{
case A_DISP_PC:
if (user->type == A_DISP_PC_ABS)
break;
case A_IMM:
case A_BDISP12:
case A_BDISP8:
case A_DISP_GBR:
case A_DISP2_TBR:
case A_MACH:
case A_PR:
case A_MACL:
if (user->type != arg)
goto fail;
break;
case A_R0:
if (user->type != A_REG_N || user->reg != 0)
goto fail;
break;
case A_R0_GBR:
if (user->type != A_R0_GBR || user->reg != 0)
goto fail;
break;
case F_FR0:
if (user->type != F_REG_N || user->reg != 0)
goto fail;
break;
case A_REG_N:
case A_INC_N:
case A_DEC_N:
case A_IND_N:
case A_IND_R0_REG_N:
case A_DISP_REG_N:
case F_REG_N:
case D_REG_N:
case X_REG_N:
case V_REG_N:
case FPUL_N:
case FPSCR_N:
case DSP_REG_N:
if (user->type != arg)
goto fail;
reg_n = user->reg;
break;
case DX_REG_N:
if (user->type != D_REG_N && user->type != X_REG_N)
goto fail;
reg_n = user->reg;
break;
case A_GBR:
case A_TBR:
case A_SR:
case A_VBR:
case A_DSR:
case A_MOD:
case A_RE:
case A_RS:
case A_SSR:
case A_SPC:
case A_SGR:
case A_DBR:
if (user->type != arg)
goto fail;
break;
case A_REG_B:
if (user->type != arg)
goto fail;
reg_b = user->reg;
break;
case A_INC_R15:
if (user->type != A_INC_N)
goto fail;
if (user->reg != 15)
goto fail;
reg_n = user->reg;
break;
case A_DEC_R15:
if (user->type != A_DEC_N)
goto fail;
if (user->reg != 15)
goto fail;
reg_n = user->reg;
break;
case A_REG_M:
case A_INC_M:
case A_DEC_M:
case A_IND_M:
case A_IND_R0_REG_M:
case A_DISP_REG_M:
case DSP_REG_M:
if (user->type != arg - A_REG_M + A_REG_N)
goto fail;
reg_m = user->reg;
break;
case AS_DEC_N:
if (user->type != A_DEC_N)
goto fail;
if (user->reg < 2 || user->reg > 5)
goto fail;
reg_n = user->reg;
break;
case AS_INC_N:
if (user->type != A_INC_N)
goto fail;
if (user->reg < 2 || user->reg > 5)
goto fail;
reg_n = user->reg;
break;
case AS_IND_N:
if (user->type != A_IND_N)
goto fail;
if (user->reg < 2 || user->reg > 5)
goto fail;
reg_n = user->reg;
break;
case AS_PMOD_N:
if (user->type != AX_PMOD_N)
goto fail;
if (user->reg < 2 || user->reg > 5)
goto fail;
reg_n = user->reg;
break;
case AX_INC_N:
if (user->type != A_INC_N)
goto fail;
if (user->reg < 4 || user->reg > 5)
goto fail;
reg_n = user->reg;
break;
case AX_IND_N:
if (user->type != A_IND_N)
goto fail;
if (user->reg < 4 || user->reg > 5)
goto fail;
reg_n = user->reg;
break;
case AX_PMOD_N:
if (user->type != AX_PMOD_N)
goto fail;
if (user->reg < 4 || user->reg > 5)
goto fail;
reg_n = user->reg;
break;
case AXY_INC_N:
if (user->type != A_INC_N)
goto fail;
if ((user->reg < 4 || user->reg > 5)
&& (user->reg < 0 || user->reg > 1))
goto fail;
reg_n = user->reg;
break;
case AXY_IND_N:
if (user->type != A_IND_N)
goto fail;
if ((user->reg < 4 || user->reg > 5)
&& (user->reg < 0 || user->reg > 1))
goto fail;
reg_n = user->reg;
break;
case AXY_PMOD_N:
if (user->type != AX_PMOD_N)
goto fail;
if ((user->reg < 4 || user->reg > 5)
&& (user->reg < 0 || user->reg > 1))
goto fail;
reg_n = user->reg;
break;
case AY_INC_N:
if (user->type != A_INC_N)
goto fail;
if (user->reg < 6 || user->reg > 7)
goto fail;
reg_n = user->reg;
break;
case AY_IND_N:
if (user->type != A_IND_N)
goto fail;
if (user->reg < 6 || user->reg > 7)
goto fail;
reg_n = user->reg;
break;
case AY_PMOD_N:
if (user->type != AY_PMOD_N)
goto fail;
if (user->reg < 6 || user->reg > 7)
goto fail;
reg_n = user->reg;
break;
case AYX_INC_N:
if (user->type != A_INC_N)
goto fail;
if ((user->reg < 6 || user->reg > 7)
&& (user->reg < 2 || user->reg > 3))
goto fail;
reg_n = user->reg;
break;
case AYX_IND_N:
if (user->type != A_IND_N)
goto fail;
if ((user->reg < 6 || user->reg > 7)
&& (user->reg < 2 || user->reg > 3))
goto fail;
reg_n = user->reg;
break;
case AYX_PMOD_N:
if (user->type != AY_PMOD_N)
goto fail;
if ((user->reg < 6 || user->reg > 7)
&& (user->reg < 2 || user->reg > 3))
goto fail;
reg_n = user->reg;
break;
case DSP_REG_A_M:
if (user->type != DSP_REG_N)
goto fail;
if (user->reg != A_A0_NUM
&& user->reg != A_A1_NUM)
goto fail;
reg_m = user->reg;
break;
case DSP_REG_AX:
if (user->type != DSP_REG_N)
goto fail;
switch (user->reg)
{
case A_A0_NUM:
reg_x = 0;
break;
case A_A1_NUM:
reg_x = 2;
break;
case A_X0_NUM:
reg_x = 1;
break;
case A_X1_NUM:
reg_x = 3;
break;
default:
goto fail;
}
break;
case DSP_REG_XY:
if (user->type != DSP_REG_N)
goto fail;
switch (user->reg)
{
case A_X0_NUM:
reg_x = 0;
break;
case A_X1_NUM:
reg_x = 2;
break;
case A_Y0_NUM:
reg_x = 1;
break;
case A_Y1_NUM:
reg_x = 3;
break;
default:
goto fail;
}
break;
case DSP_REG_AY:
if (user->type != DSP_REG_N)
goto fail;
switch (user->reg)
{
case A_A0_NUM:
reg_y = 0;
break;
case A_A1_NUM:
reg_y = 1;
break;
case A_Y0_NUM:
reg_y = 2;
break;
case A_Y1_NUM:
reg_y = 3;
break;
default:
goto fail;
}
break;
case DSP_REG_YX:
if (user->type != DSP_REG_N)
goto fail;
switch (user->reg)
{
case A_Y0_NUM:
reg_y = 0;
break;
case A_Y1_NUM:
reg_y = 1;
break;
case A_X0_NUM:
reg_y = 2;
break;
case A_X1_NUM:
reg_y = 3;
break;
default:
goto fail;
}
break;
case DSP_REG_X:
if (user->type != DSP_REG_N)
goto fail;
switch (user->reg)
{
case A_X0_NUM:
reg_x = 0;
break;
case A_X1_NUM:
reg_x = 1;
break;
case A_A0_NUM:
reg_x = 2;
break;
case A_A1_NUM:
reg_x = 3;
break;
default:
goto fail;
}
break;
case DSP_REG_Y:
if (user->type != DSP_REG_N)
goto fail;
switch (user->reg)
{
case A_Y0_NUM:
reg_y = 0;
break;
case A_Y1_NUM:
reg_y = 1;
break;
case A_M0_NUM:
reg_y = 2;
break;
case A_M1_NUM:
reg_y = 3;
break;
default:
goto fail;
}
break;
case DSP_REG_E:
if (user->type != DSP_REG_N)
goto fail;
switch (user->reg)
{
case A_X0_NUM:
reg_efg = 0 << 10;
break;
case A_X1_NUM:
reg_efg = 1 << 10;
break;
case A_Y0_NUM:
reg_efg = 2 << 10;
break;
case A_A1_NUM:
reg_efg = 3 << 10;
break;
default:
goto fail;
}
break;
case DSP_REG_F:
if (user->type != DSP_REG_N)
goto fail;
switch (user->reg)
{
case A_Y0_NUM:
reg_efg |= 0 << 8;
break;
case A_Y1_NUM:
reg_efg |= 1 << 8;
break;
case A_X0_NUM:
reg_efg |= 2 << 8;
break;
case A_A1_NUM:
reg_efg |= 3 << 8;
break;
default:
goto fail;
}
break;
case DSP_REG_G:
if (user->type != DSP_REG_N)
goto fail;
switch (user->reg)
{
case A_M0_NUM:
reg_efg |= 0 << 2;
break;
case A_M1_NUM:
reg_efg |= 1 << 2;
break;
case A_A0_NUM:
reg_efg |= 2 << 2;
break;
case A_A1_NUM:
reg_efg |= 3 << 2;
break;
default:
goto fail;
}
break;
case A_A0:
if (user->type != DSP_REG_N || user->reg != A_A0_NUM)
goto fail;
break;
case A_X0:
if (user->type != DSP_REG_N || user->reg != A_X0_NUM)
goto fail;
break;
case A_X1:
if (user->type != DSP_REG_N || user->reg != A_X1_NUM)
goto fail;
break;
case A_Y0:
if (user->type != DSP_REG_N || user->reg != A_Y0_NUM)
goto fail;
break;
case A_Y1:
if (user->type != DSP_REG_N || user->reg != A_Y1_NUM)
goto fail;
break;
case F_REG_M:
case D_REG_M:
case X_REG_M:
case V_REG_M:
case FPUL_M:
case FPSCR_M:
if (user->type != arg - F_REG_M + F_REG_N)
goto fail;
reg_m = user->reg;
break;
case DX_REG_M:
if (user->type != D_REG_N && user->type != X_REG_N)
goto fail;
reg_m = user->reg;
break;
case XMTRX_M4:
if (user->type != XMTRX_M4)
goto fail;
reg_m = 4;
break;
default:
printf (_("unhandled %d\n"), arg);
goto fail;
}
}
if ( !SH_MERGE_ARCH_SET_VALID (valid_arch, this_try->arch))
goto fail;
valid_arch = SH_MERGE_ARCH_SET (valid_arch, this_try->arch);
return this_try;
fail:
;
}
return 0;
}
static void
insert (char *where, int how, int pcrel, sh_operand_info *op)
{
fix_new_exp (frag_now,
where - frag_now->fr_literal,
2,
&op->immediate,
pcrel,
how);
}
static void
insert4 (char * where, int how, int pcrel, sh_operand_info * op)
{
fix_new_exp (frag_now,
where - frag_now->fr_literal,
4,
& op->immediate,
pcrel,
how);
}
static void
build_relax (sh_opcode_info *opcode, sh_operand_info *op)
{
int high_byte = target_big_endian ? 0 : 1;
char *p;
if (opcode->arg[0] == A_BDISP8)
{
int what = (opcode->nibbles[1] & 4) ? COND_JUMP_DELAY : COND_JUMP;
p = frag_var (rs_machine_dependent,
md_relax_table[C (what, COND32)].rlx_length,
md_relax_table[C (what, COND8)].rlx_length,
C (what, 0),
op->immediate.X_add_symbol,
op->immediate.X_add_number,
0);
p[high_byte] = (opcode->nibbles[0] << 4) | (opcode->nibbles[1]);
}
else if (opcode->arg[0] == A_BDISP12)
{
p = frag_var (rs_machine_dependent,
md_relax_table[C (UNCOND_JUMP, UNCOND32)].rlx_length,
md_relax_table[C (UNCOND_JUMP, UNCOND12)].rlx_length,
C (UNCOND_JUMP, 0),
op->immediate.X_add_symbol,
op->immediate.X_add_number,
0);
p[high_byte] = (opcode->nibbles[0] << 4);
}
}
static char *
insert_loop_bounds (char *output, sh_operand_info *operand)
{
char *name;
symbolS *end_sym;
can just stash the high byte into both bytes and ignore endianness. */
output[0] = 0x8c;
output[1] = 0x8c;
insert (output, BFD_RELOC_SH_LOOP_START, 1, operand);
insert (output, BFD_RELOC_SH_LOOP_END, 1, operand + 1);
if (sh_relax)
{
static int count = 0;
swapped with the insn after it. To prevent this, create a new
symbol - complete with SH_LABEL reloc - after the last loop insn.
If the last loop insn is four bytes long, the symbol will be
right in the middle, but four byte insns are not swapped anyways. */
Hence a 9 digit number should be enough to count all REPEATs. */
name = alloca (11);
sprintf (name, "_R%x", count++ & 0x3fffffff);
end_sym = symbol_new (name, undefined_section, 0, &zero_address_frag);
#ifdef OBJ_COFF
SF_SET_LOCAL (end_sym);
#endif
symbol_table_insert (end_sym);
end_sym->sy_value = operand[1].immediate;
end_sym->sy_value.X_add_number += 2;
fix_new (frag_now, frag_now_fix (), 2, end_sym, 0, 1, BFD_RELOC_SH_LABEL);
}
output = frag_more (2);
output[0] = 0x8e;
output[1] = 0x8e;
insert (output, BFD_RELOC_SH_LOOP_START, 1, operand);
insert (output, BFD_RELOC_SH_LOOP_END, 1, operand + 1);
return frag_more (2);
}
static unsigned int
build_Mytes (sh_opcode_info *opcode, sh_operand_info *operand)
{
int index;
char nbuf[8];
char *output;
unsigned int size = 2;
int low_byte = target_big_endian ? 1 : 0;
int max_index = 4;
nbuf[0] = 0;
nbuf[1] = 0;
nbuf[2] = 0;
nbuf[3] = 0;
nbuf[4] = 0;
nbuf[5] = 0;
nbuf[6] = 0;
nbuf[7] = 0;
if (SH_MERGE_ARCH_SET (opcode->arch, arch_op32))
{
output = frag_more (4);
size = 4;
max_index = 8;
}
else
output = frag_more (2);
for (index = 0; index < max_index; index++)
{
sh_nibble_type i = opcode->nibbles[index];
if (i < 16)
{
nbuf[index] = i;
}
else
{
switch (i)
{
case REG_N:
case REG_N_D:
nbuf[index] = reg_n;
break;
case REG_M:
nbuf[index] = reg_m;
break;
case SDT_REG_N:
if (reg_n < 2 || reg_n > 5)
as_bad (_("Invalid register: 'r%d'"), reg_n);
nbuf[index] = (reg_n & 3) | 4;
break;
case REG_NM:
nbuf[index] = reg_n | (reg_m >> 2);
break;
case REG_B:
nbuf[index] = reg_b | 0x08;
break;
case REG_N_B01:
nbuf[index] = reg_n | 0x01;
break;
case IMM0_3s:
nbuf[index] |= 0x08;
case IMM0_3c:
insert (output + low_byte, BFD_RELOC_SH_IMM3, 0, operand);
break;
case IMM0_3Us:
nbuf[index] |= 0x80;
case IMM0_3Uc:
insert (output + low_byte, BFD_RELOC_SH_IMM3U, 0, operand);
break;
case DISP0_12:
insert (output + 2, BFD_RELOC_SH_DISP12, 0, operand);
break;
case DISP0_12BY2:
insert (output + 2, BFD_RELOC_SH_DISP12BY2, 0, operand);
break;
case DISP0_12BY4:
insert (output + 2, BFD_RELOC_SH_DISP12BY4, 0, operand);
break;
case DISP0_12BY8:
insert (output + 2, BFD_RELOC_SH_DISP12BY8, 0, operand);
break;
case DISP1_12:
insert (output + 2, BFD_RELOC_SH_DISP12, 0, operand+1);
break;
case DISP1_12BY2:
insert (output + 2, BFD_RELOC_SH_DISP12BY2, 0, operand+1);
break;
case DISP1_12BY4:
insert (output + 2, BFD_RELOC_SH_DISP12BY4, 0, operand+1);
break;
case DISP1_12BY8:
insert (output + 2, BFD_RELOC_SH_DISP12BY8, 0, operand+1);
break;
case IMM0_20_4:
break;
case IMM0_20:
insert4 (output, BFD_RELOC_SH_DISP20, 0, operand);
break;
case IMM0_20BY8:
insert4 (output, BFD_RELOC_SH_DISP20BY8, 0, operand);
break;
case IMM0_4BY4:
insert (output + low_byte, BFD_RELOC_SH_IMM4BY4, 0, operand);
break;
case IMM0_4BY2:
insert (output + low_byte, BFD_RELOC_SH_IMM4BY2, 0, operand);
break;
case IMM0_4:
insert (output + low_byte, BFD_RELOC_SH_IMM4, 0, operand);
break;
case IMM1_4BY4:
insert (output + low_byte, BFD_RELOC_SH_IMM4BY4, 0, operand + 1);
break;
case IMM1_4BY2:
insert (output + low_byte, BFD_RELOC_SH_IMM4BY2, 0, operand + 1);
break;
case IMM1_4:
insert (output + low_byte, BFD_RELOC_SH_IMM4, 0, operand + 1);
break;
case IMM0_8BY4:
insert (output + low_byte, BFD_RELOC_SH_IMM8BY4, 0, operand);
break;
case IMM0_8BY2:
insert (output + low_byte, BFD_RELOC_SH_IMM8BY2, 0, operand);
break;
case IMM0_8:
insert (output + low_byte, BFD_RELOC_SH_IMM8, 0, operand);
break;
case IMM1_8BY4:
insert (output + low_byte, BFD_RELOC_SH_IMM8BY4, 0, operand + 1);
break;
case IMM1_8BY2:
insert (output + low_byte, BFD_RELOC_SH_IMM8BY2, 0, operand + 1);
break;
case IMM1_8:
insert (output + low_byte, BFD_RELOC_SH_IMM8, 0, operand + 1);
break;
case PCRELIMM_8BY4:
insert (output, BFD_RELOC_SH_PCRELIMM8BY4,
operand->type != A_DISP_PC_ABS, operand);
break;
case PCRELIMM_8BY2:
insert (output, BFD_RELOC_SH_PCRELIMM8BY2,
operand->type != A_DISP_PC_ABS, operand);
break;
case REPEAT:
output = insert_loop_bounds (output, operand);
nbuf[index] = opcode->nibbles[3];
operand += 2;
break;
default:
printf (_("failed for %d\n"), i);
}
}
}
if (!target_big_endian)
{
output[1] = (nbuf[0] << 4) | (nbuf[1]);
output[0] = (nbuf[2] << 4) | (nbuf[3]);
}
else
{
output[0] = (nbuf[0] << 4) | (nbuf[1]);
output[1] = (nbuf[2] << 4) | (nbuf[3]);
}
if (SH_MERGE_ARCH_SET (opcode->arch, arch_op32))
{
if (!target_big_endian)
{
output[3] = (nbuf[4] << 4) | (nbuf[5]);
output[2] = (nbuf[6] << 4) | (nbuf[7]);
}
else
{
output[2] = (nbuf[4] << 4) | (nbuf[5]);
output[3] = (nbuf[6] << 4) | (nbuf[7]);
}
}
return size;
}
*STR_P to the first character after the last one read. */
static sh_opcode_info *
find_cooked_opcode (char **str_p)
{
char *str = *str_p;
unsigned char *op_start;
unsigned char *op_end;
char name[20];
int nlen = 0;
while (*str == ' ')
str++;
The pre-processor will eliminate whitespace in front of
any '@' after the first argument; we may be called from
assemble_ppi, so the opcode might be terminated by an '@'. */
for (op_start = op_end = (unsigned char *) str;
*op_end
&& nlen < 20
&& !is_end_of_line[*op_end] && *op_end != ' ' && *op_end != '@';
op_end++)
{
unsigned char c = op_start[nlen];
because it thinks the '/' is the end of the symbol. Moreover,
all but the first sub-insn is a parallel processing insn won't
be capitalized. Instead of hacking up the machine independent
code, we just deal with it here. */
c = TOLOWER (c);
name[nlen] = c;
nlen++;
}
name[nlen] = 0;
*str_p = (char *) op_end;
if (nlen == 0)
as_bad (_("can't find opcode "));
return (sh_opcode_info *) hash_find (opcode_hash_control, name);
}
#define DDT_BASE 0xf000 /* Base value for double data transfer insns */
static unsigned int
assemble_ppi (char *op_end, sh_opcode_info *opcode)
{
int movx = 0;
int movy = 0;
int cond = 0;
int field_b = 0;
char *output;
int move_code;
unsigned int size;
for (;;)
{
sh_operand_info operand[3];
Make sure we encode a defined insn pattern. */
reg_x = 0;
reg_y = 0;
reg_n = 0;
if (opcode->arg[0] != A_END)
op_end = get_operands (opcode, op_end, operand);
try_another_opcode:
opcode = get_specific (opcode, operand);
if (opcode == 0)
{
char *where = frag_more (2);
size = 2;
where[0] = 0x0;
where[1] = 0x0;
as_bad (_("invalid operands for opcode"));
return size;
}
if (opcode->nibbles[0] != PPI)
as_bad (_("insn can't be combined with parallel processing insn"));
switch (opcode->nibbles[1])
{
case NOPX:
if (movx)
as_bad (_("multiple movx specifications"));
movx = DDT_BASE;
break;
case NOPY:
if (movy)
as_bad (_("multiple movy specifications"));
movy = DDT_BASE;
break;
case MOVX_NOPY:
if (movx)
as_bad (_("multiple movx specifications"));
if ((reg_n < 4 || reg_n > 5)
&& (reg_n < 0 || reg_n > 1))
as_bad (_("invalid movx address register"));
if (movy && movy != DDT_BASE)
as_bad (_("insn cannot be combined with non-nopy"));
movx = ((((reg_n & 1) != 0) << 9)
+ (((reg_n & 4) == 0) << 8)
+ (reg_x << 6)
+ (opcode->nibbles[2] << 4)
+ opcode->nibbles[3]
+ DDT_BASE);
break;
case MOVY_NOPX:
if (movy)
as_bad (_("multiple movy specifications"));
if ((reg_n < 6 || reg_n > 7)
&& (reg_n < 2 || reg_n > 3))
as_bad (_("invalid movy address register"));
if (movx && movx != DDT_BASE)
as_bad (_("insn cannot be combined with non-nopx"));
movy = ((((reg_n & 1) != 0) << 8)
+ (((reg_n & 4) == 0) << 9)
+ (reg_y << 6)
+ (opcode->nibbles[2] << 4)
+ opcode->nibbles[3]
+ DDT_BASE);
break;
case MOVX:
if (movx)
as_bad (_("multiple movx specifications"));
if (movy & 0x2ac)
as_bad (_("previous movy requires nopx"));
if (reg_n < 4 || reg_n > 5)
as_bad (_("invalid movx address register"));
if (opcode->nibbles[2] & 8)
{
if (reg_m == A_A1_NUM)
movx = 1 << 7;
else if (reg_m != A_A0_NUM)
as_bad (_("invalid movx dsp register"));
}
else
{
if (reg_x > 1)
as_bad (_("invalid movx dsp register"));
movx = reg_x << 7;
}
movx += ((reg_n - 4) << 9) + (opcode->nibbles[2] << 2) + DDT_BASE;
break;
case MOVY:
if (movy)
as_bad (_("multiple movy specifications"));
if (movx & 0x153)
as_bad (_("previous movx requires nopy"));
if (opcode->nibbles[2] & 8)
{
so add 8 more. */
movy = 8;
if (reg_m == A_A1_NUM)
movy += 1 << 6;
else if (reg_m != A_A0_NUM)
as_bad (_("invalid movy dsp register"));
}
else
{
if (reg_y > 1)
as_bad (_("invalid movy dsp register"));
movy = reg_y << 6;
}
if (reg_n < 6 || reg_n > 7)
as_bad (_("invalid movy address register"));
movy += ((reg_n - 6) << 8) + opcode->nibbles[2] + DDT_BASE;
break;
case PSH:
if (operand[0].immediate.X_op != O_constant)
as_bad (_("dsp immediate shift value not constant"));
field_b = ((opcode->nibbles[2] << 12)
| (operand[0].immediate.X_add_number & 127) << 4
| reg_n);
break;
case PPI3NC:
if (cond)
{
opcode++;
goto try_another_opcode;
}
case PPI3:
if (field_b)
as_bad (_("multiple parallel processing specifications"));
field_b = ((opcode->nibbles[2] << 12) + (opcode->nibbles[3] << 8)
+ (reg_x << 6) + (reg_y << 4) + reg_n);
switch (opcode->nibbles[4])
{
case HEX_0:
case HEX_XX00:
case HEX_00YY:
break;
case HEX_1:
case HEX_4:
field_b += opcode->nibbles[4] << 4;
break;
default:
abort ();
}
break;
case PDC:
if (cond)
as_bad (_("multiple condition specifications"));
cond = opcode->nibbles[2] << 8;
if (*op_end)
goto skip_cond_check;
break;
case PPIC:
if (field_b)
as_bad (_("multiple parallel processing specifications"));
field_b = ((opcode->nibbles[2] << 12) + (opcode->nibbles[3] << 8)
+ cond + (reg_x << 6) + (reg_y << 4) + reg_n);
cond = 0;
switch (opcode->nibbles[4])
{
case HEX_0:
case HEX_XX00:
case HEX_00YY:
break;
case HEX_1:
case HEX_4:
field_b += opcode->nibbles[4] << 4;
break;
default:
abort ();
}
break;
case PMUL:
if (field_b)
{
if ((field_b & 0xef00) == 0xa100)
field_b -= 0x8100;
else if ((field_b & 0xff00) == 0x8d00
&& (SH_MERGE_ARCH_SET_VALID (valid_arch, arch_sh4al_dsp_up)))
{
valid_arch = SH_MERGE_ARCH_SET (valid_arch, arch_sh4al_dsp_up);
field_b -= 0x8cf0;
}
else
as_bad (_("insn cannot be combined with pmuls"));
switch (field_b & 0xf)
{
case A_X0_NUM:
field_b += 0 - A_X0_NUM;
break;
case A_Y0_NUM:
field_b += 1 - A_Y0_NUM;
break;
case A_A0_NUM:
field_b += 2 - A_A0_NUM;
break;
case A_A1_NUM:
field_b += 3 - A_A1_NUM;
break;
default:
as_bad (_("bad combined pmuls output operand"));
}
and pmuls is the same ( only for A0 or A1 ).
If the last nibble is 1010 then A0 is used in both
padd / psub and pmuls. If it is 1111 then A1 is used
as destination register in both padd / psub and pmuls. */
if ((((field_b | reg_efg) & 0x000F) == 0x000A)
|| (((field_b | reg_efg) & 0x000F) == 0x000F))
as_warn (_("destination register is same for parallel insns"));
}
field_b += 0x4000 + reg_efg;
break;
default:
abort ();
}
if (cond)
{
as_bad (_("condition not followed by conditionalizable insn"));
cond = 0;
}
if (! *op_end)
break;
skip_cond_check:
opcode = find_cooked_opcode (&op_end);
if (opcode == NULL)
{
(as_bad
(_("unrecognized characters at end of parallel processing insn")));
break;
}
}
move_code = movx | movy;
if (field_b)
{
unsigned long ppi_code = (movx | movy | 0xf800) << 16 | field_b;
output = frag_more (4);
size = 4;
if (! target_big_endian)
{
output[3] = ppi_code >> 8;
output[2] = ppi_code;
}
else
{
output[2] = ppi_code >> 8;
output[3] = ppi_code;
}
move_code |= 0xf800;
}
else
{
output = frag_more (2);
size = 2;
}
if (! target_big_endian)
{
output[1] = move_code >> 8;
output[0] = move_code;
}
else
{
output[0] = move_code >> 8;
output[1] = move_code;
}
return size;
}
machine dependent instruction. This function is supposed to emit
the frags/bytes it assembles to. */
void
md_assemble (char *str)
{
char *op_end;
sh_operand_info operand[3];
sh_opcode_info *opcode;
unsigned int size = 0;
char *initial_str = str;
#ifdef HAVE_SH64
if (sh64_isa_mode == sh64_isa_shmedia)
{
shmedia_md_assemble (str);
return;
}
else
{
frags are marked as data. */
if (!seen_insn)
{
sh64_update_contents_mark (TRUE);
sh64_set_contents_type (CRT_SH5_ISA16);
}
seen_insn = TRUE;
}
#endif
opcode = find_cooked_opcode (&str);
op_end = str;
if (opcode == NULL)
{
This means we definately have an assembly failure,
but the instruction may be valid in another CPU variant.
In this case emit something better than 'unknown opcode'.
Search the full table in sh-opc.h to check. */
char *name = initial_str;
int name_length = 0;
const sh_opcode_info *op;
int found = 0;
while (ISSPACE (*name))
{
name++;
}
while (!ISSPACE (name[name_length]))
{
name_length++;
}
for (op = sh_table; op->name; op++)
{
if (strncasecmp (op->name, name, name_length) == 0
&& op->name[name_length] == '\0')
{
found = 1;
break;
}
}
if ( found )
{
as_bad (_("opcode not valid for this cpu variant"));
}
else
{
as_bad (_("unknown opcode"));
}
return;
}
if (sh_relax
&& ! seg_info (now_seg)->tc_segment_info_data.in_code)
{
bytes are instructions, not data. */
fix_new (frag_now, frag_now_fix (), 2, &abs_symbol, 0, 0,
BFD_RELOC_SH_CODE);
seg_info (now_seg)->tc_segment_info_data.in_code = 1;
}
if (opcode->nibbles[0] == PPI)
{
size = assemble_ppi (op_end, opcode);
}
else
{
if (opcode->arg[0] == A_BDISP12
|| opcode->arg[0] == A_BDISP8)
{
valid_arch now. */
if (SH_MERGE_ARCH_SET_VALID (valid_arch, opcode->arch))
valid_arch = SH_MERGE_ARCH_SET (valid_arch, opcode->arch);
else
as_bad (_("Delayed branches not available on SH1"));
parse_exp (op_end + 1, &operand[0]);
build_relax (opcode, &operand[0]);
}
else
{
if (opcode->arg[0] == A_END)
{
been compressed to a single space. */
if (*op_end == ' ')
op_end++;
}
else
{
op_end = get_operands (opcode, op_end, operand);
}
opcode = get_specific (opcode, operand);
if (opcode == 0)
{
char *where = frag_more (2);
size = 2;
where[0] = 0x0;
where[1] = 0x0;
as_bad (_("invalid operands for opcode"));
}
else
{
if (*op_end)
as_bad (_("excess operands: '%s'"), op_end);
size = build_Mytes (opcode, operand);
}
}
}
dwarf2_emit_insn (size);
}
emits a BFD_RELOC_SH_LABEL reloc if necessary. */
void
sh_frob_label (symbolS *sym)
{
static fragS *last_label_frag;
static int last_label_offset;
if (sh_relax
&& seg_info (now_seg)->tc_segment_info_data.in_code)
{
int offset;
offset = frag_now_fix ();
if (frag_now != last_label_frag
|| offset != last_label_offset)
{
fix_new (frag_now, offset, 2, &abs_symbol, 0, 0, BFD_RELOC_SH_LABEL);
last_label_frag = frag_now;
last_label_offset = offset;
}
}
dwarf2_emit_label (sym);
}
data. It emits a BFD_RELOC_SH_DATA reloc if necessary. */
void
sh_flush_pending_output (void)
{
if (sh_relax
&& seg_info (now_seg)->tc_segment_info_data.in_code)
{
fix_new (frag_now, frag_now_fix (), 2, &abs_symbol, 0, 0,
BFD_RELOC_SH_DATA);
seg_info (now_seg)->tc_segment_info_data.in_code = 0;
}
}
symbolS *
md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
{
return 0;
}
#define MAX_LITTLENUMS 6
of type TYPE, and store the appropriate bytes in *LITP. The number
of LITTLENUMS emitted is stored in *SIZEP . An error message is
returned, or NULL on OK. */
char *
md_atof (int type, char *litP, int *sizeP)
{
int prec;
LITTLENUM_TYPE words[4];
char *t;
int i;
switch (type)
{
case 'f':
prec = 2;
break;
case 'd':
prec = 4;
break;
default:
*sizeP = 0;
return _("bad call to md_atof");
}
t = atof_ieee (input_line_pointer, type, words);
if (t)
input_line_pointer = t;
*sizeP = prec * 2;
if (! target_big_endian)
{
for (i = prec - 1; i >= 0; i--)
{
md_number_to_chars (litP, (valueT) words[i], 2);
litP += 2;
}
}
else
{
for (i = 0; i < prec; i++)
{
md_number_to_chars (litP, (valueT) words[i], 2);
litP += 2;
}
}
return NULL;
}
call instruction. It refers to a label of the instruction which
loads the register which the call uses. We use it to generate a
special reloc for the linker. */
static void
s_uses (int ignore ATTRIBUTE_UNUSED)
{
expressionS ex;
if (! sh_relax)
as_warn (_(".uses pseudo-op seen when not relaxing"));
expression (&ex);
if (ex.X_op != O_symbol || ex.X_add_number != 0)
{
as_bad (_("bad .uses format"));
ignore_rest_of_line ();
return;
}
fix_new_exp (frag_now, frag_now_fix (), 2, &ex, 1, BFD_RELOC_SH_USES);
demand_empty_rest_of_line ();
}
enum options
{
OPTION_RELAX = OPTION_MD_BASE,
OPTION_BIG,
OPTION_LITTLE,
OPTION_SMALL,
OPTION_DSP,
OPTION_ISA,
OPTION_RENESAS,
OPTION_ALLOW_REG_PREFIX,
#ifdef HAVE_SH64
OPTION_ABI,
OPTION_NO_MIX,
OPTION_SHCOMPACT_CONST_CRANGE,
OPTION_NO_EXPAND,
OPTION_PT32,
#endif
OPTION_DUMMY
};
const char *md_shortopts = "";
struct option md_longopts[] =
{
{"relax", no_argument, NULL, OPTION_RELAX},
{"big", no_argument, NULL, OPTION_BIG},
{"little", no_argument, NULL, OPTION_LITTLE},
{"small", no_argument, NULL, OPTION_SMALL},
{"dsp", no_argument, NULL, OPTION_DSP},
{"isa", required_argument, NULL, OPTION_ISA},
{"renesas", no_argument, NULL, OPTION_RENESAS},
{"allow-reg-prefix", no_argument, NULL, OPTION_ALLOW_REG_PREFIX},
#ifdef HAVE_SH64
{"abi", required_argument, NULL, OPTION_ABI},
{"no-mix", no_argument, NULL, OPTION_NO_MIX},
{"shcompact-const-crange", no_argument, NULL, OPTION_SHCOMPACT_CONST_CRANGE},
{"no-expand", no_argument, NULL, OPTION_NO_EXPAND},
{"expand-pt32", no_argument, NULL, OPTION_PT32},
#endif
{NULL, no_argument, NULL, 0}
};
size_t md_longopts_size = sizeof (md_longopts);
int
md_parse_option (int c, char *arg ATTRIBUTE_UNUSED)
{
switch (c)
{
case OPTION_RELAX:
sh_relax = 1;
break;
case OPTION_BIG:
target_big_endian = 1;
break;
case OPTION_LITTLE:
target_big_endian = 0;
break;
case OPTION_SMALL:
sh_small = 1;
break;
case OPTION_DSP:
preset_target_arch = arch_sh_up & ~(arch_sh_sp_fpu|arch_sh_dp_fpu);
break;
case OPTION_RENESAS:
dont_adjust_reloc_32 = 1;
break;
case OPTION_ALLOW_REG_PREFIX:
allow_dollar_register_prefix = 1;
break;
case OPTION_ISA:
if (strcasecmp (arg, "dsp") == 0)
preset_target_arch = arch_sh_up & ~(arch_sh_sp_fpu|arch_sh_dp_fpu);
else if (strcasecmp (arg, "fp") == 0)
preset_target_arch = arch_sh_up & ~arch_sh_has_dsp;
else if (strcasecmp (arg, "any") == 0)
preset_target_arch = arch_sh_up;
#ifdef HAVE_SH64
else if (strcasecmp (arg, "shmedia") == 0)
{
if (sh64_isa_mode == sh64_isa_shcompact)
as_bad (_("Invalid combination: --isa=SHcompact with --isa=SHmedia"));
sh64_isa_mode = sh64_isa_shmedia;
}
else if (strcasecmp (arg, "shcompact") == 0)
{
if (sh64_isa_mode == sh64_isa_shmedia)
as_bad (_("Invalid combination: --isa=SHmedia with --isa=SHcompact"));
if (sh64_abi == sh64_abi_64)
as_bad (_("Invalid combination: --abi=64 with --isa=SHcompact"));
sh64_isa_mode = sh64_isa_shcompact;
}
#endif
else
{
extern const bfd_arch_info_type bfd_sh_arch;
bfd_arch_info_type const *bfd_arch = &bfd_sh_arch;
preset_target_arch = 0;
for (; bfd_arch; bfd_arch=bfd_arch->next)
{
int len = strlen(bfd_arch->printable_name);
if (bfd_arch->mach == bfd_mach_sh5)
continue;
if (strncasecmp (bfd_arch->printable_name, arg, len) != 0)
continue;
if (arg[len] == '\0')
preset_target_arch =
sh_get_arch_from_bfd_mach (bfd_arch->mach);
else if (strcasecmp(&arg[len], "-up") == 0)
preset_target_arch =
sh_get_arch_up_from_bfd_mach (bfd_arch->mach);
else
continue;
break;
}
if (!preset_target_arch)
as_bad ("Invalid argument to --isa option: %s", arg);
}
break;
#ifdef HAVE_SH64
case OPTION_ABI:
if (strcmp (arg, "32") == 0)
{
if (sh64_abi == sh64_abi_64)
as_bad (_("Invalid combination: --abi=32 with --abi=64"));
sh64_abi = sh64_abi_32;
}
else if (strcmp (arg, "64") == 0)
{
if (sh64_abi == sh64_abi_32)
as_bad (_("Invalid combination: --abi=64 with --abi=32"));
if (sh64_isa_mode == sh64_isa_shcompact)
as_bad (_("Invalid combination: --isa=SHcompact with --abi=64"));
sh64_abi = sh64_abi_64;
}
else
as_bad ("Invalid argument to --abi option: %s", arg);
break;
case OPTION_NO_MIX:
sh64_mix = FALSE;
break;
case OPTION_SHCOMPACT_CONST_CRANGE:
sh64_shcompact_const_crange = TRUE;
break;
case OPTION_NO_EXPAND:
sh64_expand = FALSE;
break;
case OPTION_PT32:
sh64_pt32 = TRUE;
break;
#endif
default:
return 0;
}
return 1;
}
void
md_show_usage (FILE *stream)
{
fprintf (stream, _("\
SH options:\n\
--little generate little endian code\n\
--big generate big endian code\n\
--relax alter jump instructions for long displacements\n\
--renesas disable optimization with section symbol for\n\
compatibility with Renesas assembler.\n\
--small align sections to 4 byte boundaries, not 16\n\
--dsp enable sh-dsp insns, and disable floating-point ISAs.\n\
--allow-reg-prefix allow '$' as a register name prefix.\n\
--isa=[any use most appropriate isa\n\
| dsp same as '-dsp'\n\
| fp"));
{
extern const bfd_arch_info_type bfd_sh_arch;
bfd_arch_info_type const *bfd_arch = &bfd_sh_arch;
for (; bfd_arch; bfd_arch=bfd_arch->next)
if (bfd_arch->mach != bfd_mach_sh5)
{
fprintf (stream, "\n | %s", bfd_arch->printable_name);
fprintf (stream, "\n | %s-up", bfd_arch->printable_name);
}
}
fprintf (stream, "]\n");
#ifdef HAVE_SH64
fprintf (stream, _("\
--isa=[shmedia set as the default instruction set for SH64\n\
| SHmedia\n\
| shcompact\n\
| SHcompact]\n"));
fprintf (stream, _("\
--abi=[32|64] set size of expanded SHmedia operands and object\n\
file type\n\
--shcompact-const-crange emit code-range descriptors for constants in\n\
SHcompact code sections\n\
--no-mix disallow SHmedia code in the same section as\n\
constants and SHcompact code\n\
--no-expand do not expand MOVI, PT, PTA or PTB instructions\n\
--expand-pt32 with -abi=64, expand PT, PTA and PTB instructions\n\
to 32 bits only\n"));
#endif
}
bfd_map_over_sections. */
struct sh_count_relocs
{
symbolS *sym;
int count;
};
symbol. This is called via bfd_map_over_sections. */
static void
sh_count_relocs (bfd *abfd ATTRIBUTE_UNUSED, segT sec, void *data)
{
struct sh_count_relocs *info = (struct sh_count_relocs *) data;
segment_info_type *seginfo;
symbolS *sym;
fixS *fix;
seginfo = seg_info (sec);
if (seginfo == NULL)
return;
sym = info->sym;
for (fix = seginfo->fix_root; fix != NULL; fix = fix->fx_next)
{
if (fix->fx_addsy == sym)
{
++info->count;
fix->fx_tcbit = 1;
}
}
}
This is called via bfd_map_over_sections. */
static void
sh_frob_section (bfd *abfd ATTRIBUTE_UNUSED, segT sec,
void *ignore ATTRIBUTE_UNUSED)
{
segment_info_type *seginfo;
fixS *fix;
seginfo = seg_info (sec);
if (seginfo == NULL)
return;
for (fix = seginfo->fix_root; fix != NULL; fix = fix->fx_next)
{
symbolS *sym;
bfd_vma val;
fixS *fscan;
struct sh_count_relocs info;
if (fix->fx_r_type != BFD_RELOC_SH_USES)
continue;
symbol in the same section. */
sym = fix->fx_addsy;
if (sym == NULL
|| fix->fx_subsy != NULL
|| fix->fx_addnumber != 0
|| S_GET_SEGMENT (sym) != sec
|| S_IS_EXTERNAL (sym))
{
as_warn_where (fix->fx_file, fix->fx_line,
_(".uses does not refer to a local symbol in the same section"));
continue;
}
at the same location as sym. */
val = S_GET_VALUE (sym);
for (fscan = seginfo->fix_root;
fscan != NULL;
fscan = fscan->fx_next)
if (val == fscan->fx_frag->fr_address + fscan->fx_where
&& fscan->fx_r_type != BFD_RELOC_SH_ALIGN
&& fscan->fx_r_type != BFD_RELOC_SH_CODE
&& fscan->fx_r_type != BFD_RELOC_SH_DATA
&& fscan->fx_r_type != BFD_RELOC_SH_LABEL)
break;
if (fscan == NULL)
{
as_warn_where (fix->fx_file, fix->fx_line,
_("can't find fixup pointed to by .uses"));
continue;
}
if (fscan->fx_tcbit)
{
continue;
}
in the same section. */
sym = fscan->fx_addsy;
if (sym == NULL
|| fscan->fx_subsy != NULL
|| fscan->fx_addnumber != 0
|| S_GET_SEGMENT (sym) != sec
|| S_IS_EXTERNAL (sym))
{
as_warn_where (fix->fx_file, fix->fx_line,
_(".uses target does not refer to a local symbol in the same section"));
continue;
}
counting the number of times we find a reference to sym. */
info.sym = sym;
info.count = 0;
bfd_map_over_sections (stdoutput, sh_count_relocs, &info);
if (info.count < 1)
abort ();
We have already adjusted the value of sym to include the
fragment address, so we undo that adjustment here. */
subseg_change (sec, 0);
fix_new (fscan->fx_frag,
S_GET_VALUE (sym) - fscan->fx_frag->fr_address,
4, &abs_symbol, info.count, 0, BFD_RELOC_SH_COUNT);
}
}
but before the relocs or section contents have been written out.
If we have seen any .uses pseudo-ops, they point to an instruction
which loads a register with the address of a function. We look
through the fixups to find where the function address is being
loaded from. We then generate a COUNT reloc giving the number of
times that function address is referred to. The linker uses this
information when doing relaxing, to decide when it can eliminate
the stored function address entirely. */
void
sh_frob_file (void)
{
#ifdef HAVE_SH64
shmedia_frob_file_before_adjust ();
#endif
if (! sh_relax)
return;
bfd_map_over_sections (stdoutput, sh_frob_section, NULL);
}
create relocs so that md_apply_fix will fill in the correct values. */
void
md_convert_frag (bfd *headers ATTRIBUTE_UNUSED, segT seg, fragS *fragP)
{
int donerelax = 0;
switch (fragP->fr_subtype)
{
case C (COND_JUMP, COND8):
case C (COND_JUMP_DELAY, COND8):
subseg_change (seg, 0);
fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, fragP->fr_offset,
1, BFD_RELOC_SH_PCDISP8BY2);
fragP->fr_fix += 2;
fragP->fr_var = 0;
break;
case C (UNCOND_JUMP, UNCOND12):
subseg_change (seg, 0);
fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, fragP->fr_offset,
1, BFD_RELOC_SH_PCDISP12BY2);
fragP->fr_fix += 2;
fragP->fr_var = 0;
break;
case C (UNCOND_JUMP, UNCOND32):
case C (UNCOND_JUMP, UNDEF_WORD_DISP):
if (fragP->fr_symbol == NULL)
as_bad_where (fragP->fr_file, fragP->fr_line,
_("displacement overflows 12-bit field"));
else if (S_IS_DEFINED (fragP->fr_symbol))
as_bad_where (fragP->fr_file, fragP->fr_line,
_("displacement to defined symbol %s overflows 12-bit field"),
S_GET_NAME (fragP->fr_symbol));
else
as_bad_where (fragP->fr_file, fragP->fr_line,
_("displacement to undefined symbol %s overflows 12-bit field"),
S_GET_NAME (fragP->fr_symbol));
fragP->fr_fix += fragP->fr_var;
fragP->fr_var = 0;
break;
case C (COND_JUMP, COND12):
case C (COND_JUMP_DELAY, COND12):
was due to gas incorrectly relaxing an out-of-range conditional
branch with delay slot. It turned:
bf.s L6 (slot mov.l r12,@(44,r0))
into:
2c: 8f 01 a0 8b bf.s 32 <_main+32> (slot bra L6)
30: 00 09 nop
32: 10 cb mov.l r12,@(44,r0)
Therefore, branches with delay slots have to be handled
differently from ones without delay slots. */
{
unsigned char *buffer =
(unsigned char *) (fragP->fr_fix + fragP->fr_literal);
int highbyte = target_big_endian ? 0 : 1;
int lowbyte = target_big_endian ? 1 : 0;
int delay = fragP->fr_subtype == C (COND_JUMP_DELAY, COND12);
buffer[highbyte] ^= 0x2;
slot. So we change it to a non-delayed branch, like that:
b! cond slot_label; bra disp; slot_label: slot_insn
??? We should try if swapping the conditional branch and
its delay-slot insn already makes the branch reach. */
subseg_change (seg, 0);
fix_new (fragP, fragP->fr_fix, 2, section_symbol (seg),
fragP->fr_address + fragP->fr_fix + (delay ? 4 : 6),
1, BFD_RELOC_SH_PCDISP8BY2);
buffer[highbyte + 2] = 0xa0;
buffer[lowbyte + 2] = 0;
fix_new (fragP, fragP->fr_fix + 2, 2, fragP->fr_symbol,
fragP->fr_offset, 1, BFD_RELOC_SH_PCDISP12BY2);
if (delay)
{
buffer[highbyte] &= ~0x4;
fragP->fr_fix += 4;
}
else
{
buffer[highbyte + 4] = 0x0;
buffer[lowbyte + 4] = 0x9;
fragP->fr_fix += 6;
}
fragP->fr_var = 0;
donerelax = 1;
}
break;
case C (COND_JUMP, COND32):
case C (COND_JUMP_DELAY, COND32):
case C (COND_JUMP, UNDEF_WORD_DISP):
case C (COND_JUMP_DELAY, UNDEF_WORD_DISP):
if (fragP->fr_symbol == NULL)
as_bad_where (fragP->fr_file, fragP->fr_line,
_("displacement overflows 8-bit field"));
else if (S_IS_DEFINED (fragP->fr_symbol))
as_bad_where (fragP->fr_file, fragP->fr_line,
_("displacement to defined symbol %s overflows 8-bit field"),
S_GET_NAME (fragP->fr_symbol));
else
as_bad_where (fragP->fr_file, fragP->fr_line,
_("displacement to undefined symbol %s overflows 8-bit field "),
S_GET_NAME (fragP->fr_symbol));
fragP->fr_fix += fragP->fr_var;
fragP->fr_var = 0;
break;
default:
#ifdef HAVE_SH64
shmedia_md_convert_frag (headers, seg, fragP, TRUE);
#else
abort ();
#endif
}
if (donerelax && !sh_relax)
as_warn_where (fragP->fr_file, fragP->fr_line,
_("overflow in branch to %s; converted into longer instruction sequence"),
(fragP->fr_symbol != NULL
? S_GET_NAME (fragP->fr_symbol)
: ""));
}
valueT
md_section_align (segT seg ATTRIBUTE_UNUSED, valueT size)
{
#ifdef OBJ_ELF
return size;
#else
return ((size + (1 << bfd_get_section_alignment (stdoutput, seg)) - 1)
& (-1 << bfd_get_section_alignment (stdoutput, seg)));
#endif
}
the expression does not need to be aligned. */
static int sh_no_align_cons = 0;
.uaword. .uaword is just like .word, but the value does not need
to be aligned. */
static void
s_uacons (int bytes)
{
sh_no_align_cons = 1;
cons (bytes);
}
aligned correctly. Note that this can cause warnings to be issued
when assembling initialized structured which were declared with the
packed attribute. FIXME: Perhaps we should require an option to
enable this warning? */
void
sh_cons_align (int nbytes)
{
int nalign;
char *p;
if (sh_no_align_cons)
{
sh_no_align_cons = 0;
return;
}
nalign = 0;
while ((nbytes & 1) == 0)
{
++nalign;
nbytes >>= 1;
}
if (nalign == 0)
return;
if (now_seg == absolute_section)
{
if ((abs_section_offset & ((1 << nalign) - 1)) != 0)
as_warn (_("misaligned data"));
return;
}
p = frag_var (rs_align_test, 1, 1, (relax_substateT) 0,
(symbolS *) NULL, (offsetT) nalign, (char *) NULL);
record_alignment (now_seg, nalign);
}
that requests alignment to a four byte boundary or larger. This is
also where we check for misaligned data. */
void
sh_handle_align (fragS *frag)
{
int bytes = frag->fr_next->fr_address - frag->fr_address - frag->fr_fix;
if (frag->fr_type == rs_align_code)
{
static const unsigned char big_nop_pattern[] = { 0x00, 0x09 };
static const unsigned char little_nop_pattern[] = { 0x09, 0x00 };
char *p = frag->fr_literal + frag->fr_fix;
if (bytes & 1)
{
*p++ = 0;
bytes--;
frag->fr_fix += 1;
}
if (target_big_endian)
{
memcpy (p, big_nop_pattern, sizeof big_nop_pattern);
frag->fr_var = sizeof big_nop_pattern;
}
else
{
memcpy (p, little_nop_pattern, sizeof little_nop_pattern);
frag->fr_var = sizeof little_nop_pattern;
}
}
else if (frag->fr_type == rs_align_test)
{
if (bytes != 0)
as_warn_where (frag->fr_file, frag->fr_line, _("misaligned data"));
}
if (sh_relax
&& (frag->fr_type == rs_align
|| frag->fr_type == rs_align_code)
&& frag->fr_address + frag->fr_fix > 0
&& frag->fr_offset > 1
&& now_seg != bss_section)
fix_new (frag, frag->fr_fix, 2, &abs_symbol, frag->fr_offset, 0,
BFD_RELOC_SH_ALIGN);
}
static bfd_boolean
sh_local_pcrel (fixS *fix)
{
return (! sh_relax
&& (fix->fx_r_type == BFD_RELOC_SH_PCDISP8BY2
|| fix->fx_r_type == BFD_RELOC_SH_PCDISP12BY2
|| fix->fx_r_type == BFD_RELOC_SH_PCRELIMM8BY2
|| fix->fx_r_type == BFD_RELOC_SH_PCRELIMM8BY4
|| fix->fx_r_type == BFD_RELOC_8_PCREL
|| fix->fx_r_type == BFD_RELOC_SH_SWITCH16
|| fix->fx_r_type == BFD_RELOC_SH_SWITCH32));
}
This is used to force out switch and PC relative relocations when
relaxing. */
int
sh_force_relocation (fixS *fix)
{
them for global symbols. */
if (sh_local_pcrel (fix))
return 0;
if (fix->fx_r_type == BFD_RELOC_SH_LOOP_START
|| fix->fx_r_type == BFD_RELOC_SH_LOOP_END
|| fix->fx_r_type == BFD_RELOC_SH_TLS_GD_32
|| fix->fx_r_type == BFD_RELOC_SH_TLS_LD_32
|| fix->fx_r_type == BFD_RELOC_SH_TLS_IE_32
|| fix->fx_r_type == BFD_RELOC_SH_TLS_LDO_32
|| fix->fx_r_type == BFD_RELOC_SH_TLS_LE_32
|| generic_force_reloc (fix))
return 1;
if (! sh_relax)
return 0;
return (fix->fx_pcrel
|| SWITCH_TABLE (fix)
|| fix->fx_r_type == BFD_RELOC_SH_COUNT
|| fix->fx_r_type == BFD_RELOC_SH_ALIGN
|| fix->fx_r_type == BFD_RELOC_SH_CODE
|| fix->fx_r_type == BFD_RELOC_SH_DATA
#ifdef HAVE_SH64
|| fix->fx_r_type == BFD_RELOC_SH_SHMEDIA_CODE
#endif
|| fix->fx_r_type == BFD_RELOC_SH_LABEL);
}
#ifdef OBJ_ELF
bfd_boolean
sh_fix_adjustable (fixS *fixP)
{
if (fixP->fx_r_type == BFD_RELOC_32_PLT_PCREL
|| fixP->fx_r_type == BFD_RELOC_32_GOT_PCREL
|| fixP->fx_r_type == BFD_RELOC_SH_GOTPC
|| ((fixP->fx_r_type == BFD_RELOC_32) && dont_adjust_reloc_32)
|| fixP->fx_r_type == BFD_RELOC_RVA)
return 0;
if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
|| fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
return 0;
return 1;
}
void
sh_elf_final_processing (void)
{
int val;
a processor with the sh-dsp / sh2e ISA to execute. */
#ifdef HAVE_SH64
in sh-opc.h, so check SH64 mode before checking valid_arch. */
if (sh64_isa_mode != sh64_isa_unspecified)
val = EF_SH5;
else
#elif defined TARGET_SYMBIAN
if (1)
{
extern int sh_symbian_find_elf_flags (unsigned int);
val = sh_symbian_find_elf_flags (valid_arch);
}
else
#endif
val = sh_find_elf_flags (valid_arch);
elf_elfheader (stdoutput)->e_flags &= ~EF_SH_MACH_MASK;
elf_elfheader (stdoutput)->e_flags |= val;
}
#endif
void
md_apply_fix (fixS *fixP, valueT *valP, segT seg ATTRIBUTE_UNUSED)
{
char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
int lowbyte = target_big_endian ? 1 : 0;
int highbyte = target_big_endian ? 0 : 1;
long val = (long) *valP;
long max, min;
int shift;
current section, is transformed in a PC-relative relocation to
the other symbol. We have to adjust the relocation type here. */
if (fixP->fx_pcrel)
{
switch (fixP->fx_r_type)
{
default:
break;
case BFD_RELOC_32:
fixP->fx_r_type = BFD_RELOC_32_PCREL;
break;
We'd need a new reloc type to handle 16_PCREL, and
8_PCREL is already taken for R_SH_SWITCH8, which
apparently does something completely different than what
we need. FIXME. */
case BFD_RELOC_16:
bfd_set_error (bfd_error_bad_value);
return;
case BFD_RELOC_8:
bfd_set_error (bfd_error_bad_value);
return;
}
}
symbol into a reloc against a section, but bfd_install_relocation
will screw up if the symbol is defined, so we have to adjust val here
to avoid the screw up later.
For ordinary relocs, this does not happen for ELF, since for ELF,
bfd_install_relocation uses the "special function" field of the
howto, and does not execute the code that needs to be undone, as long
as the special function does not return bfd_reloc_continue.
It can happen for GOT- and PLT-type relocs the way they are
described in elf32-sh.c as they use bfd_elf_generic_reloc, but it
doesn't matter here since those relocs don't use VAL; see below. */
if (OUTPUT_FLAVOR != bfd_target_elf_flavour
&& fixP->fx_addsy != NULL
&& S_IS_WEAK (fixP->fx_addsy))
val -= S_GET_VALUE (fixP->fx_addsy);
if (SWITCH_TABLE (fixP))
val -= S_GET_VALUE (fixP->fx_subsy);
max = min = 0;
shift = 0;
switch (fixP->fx_r_type)
{
case BFD_RELOC_SH_IMM3:
max = 0x7;
* buf = (* buf & 0xf8) | (val & 0x7);
break;
case BFD_RELOC_SH_IMM3U:
max = 0x7;
* buf = (* buf & 0x8f) | ((val & 0x7) << 4);
break;
case BFD_RELOC_SH_DISP12:
max = 0xfff;
buf[lowbyte] = val & 0xff;
buf[highbyte] |= (val >> 8) & 0x0f;
break;
case BFD_RELOC_SH_DISP12BY2:
max = 0xfff;
shift = 1;
buf[lowbyte] = (val >> 1) & 0xff;
buf[highbyte] |= (val >> 9) & 0x0f;
break;
case BFD_RELOC_SH_DISP12BY4:
max = 0xfff;
shift = 2;
buf[lowbyte] = (val >> 2) & 0xff;
buf[highbyte] |= (val >> 10) & 0x0f;
break;
case BFD_RELOC_SH_DISP12BY8:
max = 0xfff;
shift = 3;
buf[lowbyte] = (val >> 3) & 0xff;
buf[highbyte] |= (val >> 11) & 0x0f;
break;
case BFD_RELOC_SH_DISP20:
if (! target_big_endian)
abort();
max = 0x7ffff;
min = -0x80000;
buf[1] = (buf[1] & 0x0f) | ((val >> 12) & 0xf0);
buf[2] = (val >> 8) & 0xff;
buf[3] = val & 0xff;
break;
case BFD_RELOC_SH_DISP20BY8:
if (!target_big_endian)
abort();
max = 0x7ffff;
min = -0x80000;
shift = 8;
buf[1] = (buf[1] & 0x0f) | ((val >> 20) & 0xf0);
buf[2] = (val >> 16) & 0xff;
buf[3] = (val >> 8) & 0xff;
break;
case BFD_RELOC_SH_IMM4:
max = 0xf;
*buf = (*buf & 0xf0) | (val & 0xf);
break;
case BFD_RELOC_SH_IMM4BY2:
max = 0xf;
shift = 1;
*buf = (*buf & 0xf0) | ((val >> 1) & 0xf);
break;
case BFD_RELOC_SH_IMM4BY4:
max = 0xf;
shift = 2;
*buf = (*buf & 0xf0) | ((val >> 2) & 0xf);
break;
case BFD_RELOC_SH_IMM8BY2:
max = 0xff;
shift = 1;
*buf = val >> 1;
break;
case BFD_RELOC_SH_IMM8BY4:
max = 0xff;
shift = 2;
*buf = val >> 2;
break;
case BFD_RELOC_8:
case BFD_RELOC_SH_IMM8:
sometimes it is not (e.g., and). We permit any 8 bit value.
Note that adding further restrictions may invalidate
reasonable looking assembly code, such as ``and -0x1,r0''. */
max = 0xff;
min = -0xff;
*buf++ = val;
break;
case BFD_RELOC_SH_PCRELIMM8BY4:
displacement is added in. We can assume that the destination
is on a 4 byte boundary. If this instruction is also on a 4
byte boundary, then we want
(target - here) / 4
and target - here is a multiple of 4.
Otherwise, we are on a 2 byte boundary, and we want
(target - (here - 2)) / 4
and target - here is not a multiple of 4. Computing
(target - (here - 2)) / 4 == (target - here + 2) / 4
works for both cases, since in the first case the addition of
2 will be removed by the division. target - here is in the
variable val. */
val = (val + 2) / 4;
if (val & ~0xff)
as_bad_where (fixP->fx_file, fixP->fx_line, _("pcrel too far"));
buf[lowbyte] = val;
break;
case BFD_RELOC_SH_PCRELIMM8BY2:
val /= 2;
if (val & ~0xff)
as_bad_where (fixP->fx_file, fixP->fx_line, _("pcrel too far"));
buf[lowbyte] = val;
break;
case BFD_RELOC_SH_PCDISP8BY2:
val /= 2;
if (val < -0x80 || val > 0x7f)
as_bad_where (fixP->fx_file, fixP->fx_line, _("pcrel too far"));
buf[lowbyte] = val;
break;
case BFD_RELOC_SH_PCDISP12BY2:
val /= 2;
if (val < -0x800 || val > 0x7ff)
as_bad_where (fixP->fx_file, fixP->fx_line, _("pcrel too far"));
buf[lowbyte] = val & 0xff;
buf[highbyte] |= (val >> 8) & 0xf;
break;
case BFD_RELOC_32:
case BFD_RELOC_32_PCREL:
md_number_to_chars (buf, val, 4);
break;
case BFD_RELOC_16:
md_number_to_chars (buf, val, 2);
break;
case BFD_RELOC_SH_USES:
fixP->fx_addnumber = val;
break;
case BFD_RELOC_SH_COUNT:
case BFD_RELOC_SH_ALIGN:
case BFD_RELOC_SH_CODE:
case BFD_RELOC_SH_DATA:
case BFD_RELOC_SH_LABEL:
break;
case BFD_RELOC_SH_LOOP_START:
case BFD_RELOC_SH_LOOP_END:
case BFD_RELOC_VTABLE_INHERIT:
case BFD_RELOC_VTABLE_ENTRY:
fixP->fx_done = 0;
return;
#ifdef OBJ_ELF
case BFD_RELOC_32_PLT_PCREL:
runtime we merely add the offset to the actual PLT entry. */
* valP = 0xfffffffc;
val = fixP->fx_offset;
if (fixP->fx_subsy)
val -= S_GET_VALUE (fixP->fx_subsy);
fixP->fx_addnumber = val;
md_number_to_chars (buf, val, 4);
break;
case BFD_RELOC_SH_GOTPC:
operands that look like "_GLOBAL_OFFSET_TABLE_+[.-.L284]".
The goal here is to obtain the absolute address of the GOT,
and it is strongly preferable from a performance point of
view to avoid using a runtime relocation for this. There are
cases where you have something like:
.long _GLOBAL_OFFSET_TABLE_+[.-.L66]
and here no correction would be required. Internally in the
assembler we treat operands of this form as not being pcrel
since the '.' is explicitly mentioned, and I wonder whether
it would simplify matters to do it this way. Who knows. In
earlier versions of the PIC patches, the pcrel_adjust field
was used to store the correction, but since the expression is
not pcrel, I felt it would be confusing to do it this way. */
* valP -= 1;
md_number_to_chars (buf, val, 4);
break;
case BFD_RELOC_SH_TLS_GD_32:
case BFD_RELOC_SH_TLS_LD_32:
case BFD_RELOC_SH_TLS_IE_32:
S_SET_THREAD_LOCAL (fixP->fx_addsy);
case BFD_RELOC_32_GOT_PCREL:
case BFD_RELOC_SH_GOTPLT32:
* valP = 0;
md_number_to_chars (buf, 0, 4);
break;
case BFD_RELOC_SH_TLS_LDO_32:
case BFD_RELOC_SH_TLS_LE_32:
S_SET_THREAD_LOCAL (fixP->fx_addsy);
case BFD_RELOC_32_GOTOFF:
md_number_to_chars (buf, val, 4);
break;
#endif
default:
#ifdef HAVE_SH64
shmedia_md_apply_fix (fixP, valP);
return;
#else
abort ();
#endif
}
if (shift != 0)
{
if ((val & ((1 << shift) - 1)) != 0)
as_bad_where (fixP->fx_file, fixP->fx_line, _("misaligned offset"));
if (val >= 0)
val >>= shift;
else
val = ((val >> shift)
| ((long) -1 & ~ ((long) -1 >> shift)));
}
if (max != 0 && (val < min || val > max))
as_bad_where (fixP->fx_file, fixP->fx_line, _("offset out of range"));
if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0)
fixP->fx_done = 1;
}
by which a fragment must grow to reach it's destination. */
int
md_estimate_size_before_relax (fragS *fragP, segT segment_type)
{
int what;
switch (fragP->fr_subtype)
{
default:
#ifdef HAVE_SH64
return shmedia_md_estimate_size_before_relax (fragP, segment_type);
#else
abort ();
#endif
case C (UNCOND_JUMP, UNDEF_DISP):
if (!fragP->fr_symbol)
{
fragP->fr_subtype = C (UNCOND_JUMP, UNCOND12);
}
else if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
{
fragP->fr_subtype = C (UNCOND_JUMP, UNCOND12);
}
else
{
fragP->fr_subtype = C (UNCOND_JUMP, UNDEF_WORD_DISP);
}
break;
case C (COND_JUMP, UNDEF_DISP):
case C (COND_JUMP_DELAY, UNDEF_DISP):
what = GET_WHAT (fragP->fr_subtype);
if (fragP->fr_symbol
&& S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
{
sized - maybe it will fix up. */
fragP->fr_subtype = C (what, COND8);
}
else if (fragP->fr_symbol)
{
fragP->fr_subtype = C (what, UNDEF_WORD_DISP);
}
else
{
fragP->fr_subtype = C (what, COND8);
}
break;
case C (UNCOND_JUMP, UNCOND12):
case C (UNCOND_JUMP, UNCOND32):
case C (UNCOND_JUMP, UNDEF_WORD_DISP):
case C (COND_JUMP, COND8):
case C (COND_JUMP, COND12):
case C (COND_JUMP, COND32):
case C (COND_JUMP, UNDEF_WORD_DISP):
case C (COND_JUMP_DELAY, COND8):
case C (COND_JUMP_DELAY, COND12):
case C (COND_JUMP_DELAY, COND32):
case C (COND_JUMP_DELAY, UNDEF_WORD_DISP):
do anything besides return the current size. */
break;
}
fragP->fr_var = md_relax_table[fragP->fr_subtype].rlx_length;
return fragP->fr_var;
}
void
md_number_to_chars (char *ptr, valueT use, int nbytes)
{
#ifdef HAVE_SH64
sh64_flag_output ();
#endif
if (! target_big_endian)
number_to_chars_littleendian (ptr, use, nbytes);
else
number_to_chars_bigendian (ptr, use, nbytes);
}
long
md_pcrel_from (fixS *fixP)
{
return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address + 2;
}
long
md_pcrel_from_section (fixS *fixP, segT sec)
{
if (! sh_local_pcrel (fixP)
&& fixP->fx_addsy != (symbolS *) NULL
&& (generic_force_reloc (fixP)
|| S_GET_SEGMENT (fixP->fx_addsy) != sec))
{
or we're not sure about it being the final definition). Let the
linker figure it out. We need to adjust the subtraction of a
symbol to the position of the relocated data, though. */
return fixP->fx_subsy ? fixP->fx_where + fixP->fx_frag->fr_address : 0;
}
return md_pcrel_from (fixP);
}
arelent *
tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp)
{
arelent *rel;
bfd_reloc_code_real_type r_type;
rel = (arelent *) xmalloc (sizeof (arelent));
rel->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
*rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
rel->address = fixp->fx_frag->fr_address + fixp->fx_where;
r_type = fixp->fx_r_type;
if (SWITCH_TABLE (fixp))
{
*rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_subsy);
rel->addend = 0;
if (r_type == BFD_RELOC_16)
r_type = BFD_RELOC_SH_SWITCH16;
else if (r_type == BFD_RELOC_8)
r_type = BFD_RELOC_8_PCREL;
else if (r_type == BFD_RELOC_32)
r_type = BFD_RELOC_SH_SWITCH32;
else
abort ();
}
else if (r_type == BFD_RELOC_SH_USES)
rel->addend = fixp->fx_addnumber;
else if (r_type == BFD_RELOC_SH_COUNT)
rel->addend = fixp->fx_offset;
else if (r_type == BFD_RELOC_SH_ALIGN)
rel->addend = fixp->fx_offset;
else if (r_type == BFD_RELOC_VTABLE_INHERIT
|| r_type == BFD_RELOC_VTABLE_ENTRY)
rel->addend = fixp->fx_offset;
else if (r_type == BFD_RELOC_SH_LOOP_START
|| r_type == BFD_RELOC_SH_LOOP_END)
rel->addend = fixp->fx_offset;
else if (r_type == BFD_RELOC_SH_LABEL && fixp->fx_pcrel)
{
rel->addend = 0;
rel->address = rel->addend = fixp->fx_offset;
}
#ifdef HAVE_SH64
else if (shmedia_init_reloc (rel, fixp))
;
#endif
else if (fixp->fx_pcrel)
rel->addend = fixp->fx_addnumber;
else if (r_type == BFD_RELOC_32 || r_type == BFD_RELOC_32_GOTOFF)
rel->addend = fixp->fx_addnumber;
else
rel->addend = 0;
rel->howto = bfd_reloc_type_lookup (stdoutput, r_type);
if (rel->howto == NULL)
{
as_bad_where (fixp->fx_file, fixp->fx_line,
_("Cannot represent relocation type %s"),
bfd_get_reloc_code_name (r_type));
rel->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_32);
assert (rel->howto != NULL);
}
#ifdef OBJ_ELF
else if (rel->howto->type == R_SH_IND12W)
rel->addend += fixp->fx_offset - 4;
#endif
return rel;
}
#ifdef OBJ_ELF
inline static char *
sh_end_of_match (char *cont, char *what)
{
int len = strlen (what);
if (strncasecmp (cont, what, strlen (what)) == 0
&& ! is_part_of_name (cont[len]))
return cont + len;
return NULL;
}
int
sh_parse_name (char const *name,
expressionS *exprP,
enum expr_mode mode,
char *nextcharP)
{
char *next = input_line_pointer;
char *next_end;
int reloc_type;
segT segment;
exprP->X_op_symbol = NULL;
if (strcmp (name, GLOBAL_OFFSET_TABLE_NAME) == 0)
{
if (! GOT_symbol)
GOT_symbol = symbol_find_or_make (name);
exprP->X_add_symbol = GOT_symbol;
no_suffix:
value now. */
segment = S_GET_SEGMENT (exprP->X_add_symbol);
if (mode != expr_defer && segment == absolute_section)
{
exprP->X_op = O_constant;
exprP->X_add_number = S_GET_VALUE (exprP->X_add_symbol);
exprP->X_add_symbol = NULL;
}
else if (mode != expr_defer && segment == reg_section)
{
exprP->X_op = O_register;
exprP->X_add_number = S_GET_VALUE (exprP->X_add_symbol);
exprP->X_add_symbol = NULL;
}
else
{
exprP->X_op = O_symbol;
exprP->X_add_number = 0;
}
return 1;
}
exprP->X_add_symbol = symbol_find_or_make (name);
if (*nextcharP != '@')
goto no_suffix;
else if ((next_end = sh_end_of_match (next + 1, "GOTOFF")))
reloc_type = BFD_RELOC_32_GOTOFF;
else if ((next_end = sh_end_of_match (next + 1, "GOTPLT")))
reloc_type = BFD_RELOC_SH_GOTPLT32;
else if ((next_end = sh_end_of_match (next + 1, "GOT")))
reloc_type = BFD_RELOC_32_GOT_PCREL;
else if ((next_end = sh_end_of_match (next + 1, "PLT")))
reloc_type = BFD_RELOC_32_PLT_PCREL;
else if ((next_end = sh_end_of_match (next + 1, "TLSGD")))
reloc_type = BFD_RELOC_SH_TLS_GD_32;
else if ((next_end = sh_end_of_match (next + 1, "TLSLDM")))
reloc_type = BFD_RELOC_SH_TLS_LD_32;
else if ((next_end = sh_end_of_match (next + 1, "GOTTPOFF")))
reloc_type = BFD_RELOC_SH_TLS_IE_32;
else if ((next_end = sh_end_of_match (next + 1, "TPOFF")))
reloc_type = BFD_RELOC_SH_TLS_LE_32;
else if ((next_end = sh_end_of_match (next + 1, "DTPOFF")))
reloc_type = BFD_RELOC_SH_TLS_LDO_32;
else
goto no_suffix;
*input_line_pointer = *nextcharP;
input_line_pointer = next_end;
*nextcharP = *input_line_pointer;
*input_line_pointer = '\0';
exprP->X_op = O_PIC_reloc;
exprP->X_add_number = 0;
exprP->X_md = reloc_type;
return 1;
}
void
sh_cfi_frame_initial_instructions (void)
{
cfi_add_CFA_def_cfa (15, 0);
}
int
sh_regname_to_dw2regnum (const char *regname)
{
unsigned int regnum = -1;
unsigned int i;
const char *p;
char *q;
static struct { char *name; int dw2regnum; } regnames[] =
{
{ "pr", 17 }, { "t", 18 }, { "gbr", 19 }, { "mach", 20 },
{ "macl", 21 }, { "fpul", 23 }
};
for (i = 0; i < ARRAY_SIZE (regnames); ++i)
if (strcmp (regnames[i].name, regname) == 0)
return regnames[i].dw2regnum;
if (regname[0] == 'r')
{
p = regname + 1;
regnum = strtoul (p, &q, 10);
if (p == q || *q || regnum >= 16)
return -1;
}
else if (regname[0] == 'f' && regname[1] == 'r')
{
p = regname + 2;
regnum = strtoul (p, &q, 10);
if (p == q || *q || regnum >= 16)
return -1;
regnum += 25;
}
else if (regname[0] == 'x' && regname[1] == 'd')
{
p = regname + 2;
regnum = strtoul (p, &q, 10);
if (p == q || *q || regnum >= 8)
return -1;
regnum += 87;
}
return regnum;
}
#endif
