/* tc-arc.c -- Assembler for the ARC
- Copyright 1994, 1995, 1997, 1999, 2000, 2001
+ Copyright 1994, 1995, 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005
Free Software Foundation, Inc.
Contributed by Doug Evans (dje@cygnus.com).
02111-1307, USA. */
#include <stdio.h>
-#include <ctype.h>
#include "libiberty.h"
#include "as.h"
+#include "struc-symbol.h"
+#include "safe-ctype.h"
#include "subsegs.h"
#include "opcode/arc.h"
#include "../opcodes/arc-ext.h"
#include "elf/arc.h"
#include "dwarf2dbg.h"
-extern int arc_get_mach PARAMS ((char *));
-extern int arc_operand_type PARAMS ((int));
-extern int arc_insn_not_jl PARAMS ((arc_insn));
-extern int arc_limm_fixup_adjust PARAMS ((arc_insn));
-extern int arc_get_noshortcut_flag PARAMS ((void));
-extern int arc_set_ext_seg PARAMS ((void));
-extern void arc_code_symbol PARAMS ((expressionS *));
-
-static arc_insn arc_insert_operand PARAMS ((arc_insn,
- const struct arc_operand *, int,
- const struct arc_operand_value *,
- offsetT, char *, unsigned int));
-static void arc_common PARAMS ((int));
-static void arc_extinst PARAMS ((int));
-static void arc_extoper PARAMS ((int));
-static void arc_option PARAMS ((int));
-static int get_arc_exp_reloc_type PARAMS ((int, int, expressionS *,
- expressionS *));
-
-const struct suffix_classes {
+const struct suffix_classes
+{
char *name;
int len;
-} suffixclass[] = {
+} suffixclass[] =
+{
{ "SUFFIX_COND|SUFFIX_FLAG",23 },
{ "SUFFIX_FLAG", 11 },
{ "SUFFIX_COND", 11 },
#define MAXSUFFIXCLASS (sizeof (suffixclass) / sizeof (struct suffix_classes))
-const struct syntax_classes {
+const struct syntax_classes
+{
char *name;
int len;
int class;
-} syntaxclass[] = {
+} syntaxclass[] =
+{
{ "SYNTAX_3OP|OP1_MUST_BE_IMM", 26, SYNTAX_3OP|OP1_MUST_BE_IMM|SYNTAX_VALID },
{ "OP1_MUST_BE_IMM|SYNTAX_3OP", 26, OP1_MUST_BE_IMM|SYNTAX_3OP|SYNTAX_VALID },
{ "SYNTAX_2OP|OP1_IMM_IMPLIED", 26, SYNTAX_2OP|OP1_IMM_IMPLIED|SYNTAX_VALID },
#define MAXSYNTAXCLASS (sizeof (syntaxclass) / sizeof (struct syntax_classes))
-const pseudo_typeS md_pseudo_table[] = {
- { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */
- { "comm", arc_common, 0 },
- { "common", arc_common, 0 },
- { "lcomm", arc_common, 1 },
- { "lcommon", arc_common, 1 },
- { "2byte", cons, 2 },
- { "half", cons, 2 },
- { "short", cons, 2 },
- { "3byte", cons, 3 },
- { "4byte", cons, 4 },
- { "word", cons, 4 },
- { "option", arc_option, 0 },
- { "cpu", arc_option, 0 },
- { "block", s_space, 0 },
- { "file", dwarf2_directive_file, 0 },
- { "loc", dwarf2_directive_loc, 0 },
- { "extcondcode", arc_extoper, 0 },
- { "extcoreregister", arc_extoper, 1 },
- { "extauxregister", arc_extoper, 2 },
- { "extinstruction", arc_extinst, 0 },
- { NULL, 0, 0 },
-};
-
/* This array holds the chars that always start a comment. If the
pre-processor is disabled, these aren't very useful. */
const char comment_chars[] = "#;";
static struct hash_control *arc_suffix_hash = NULL;
\f
const char *md_shortopts = "";
-struct option md_longopts[] = {
-#define OPTION_EB (OPTION_MD_BASE + 0)
+
+enum options
+{
+ OPTION_EB = OPTION_MD_BASE,
+ OPTION_EL,
+ OPTION_ARC5,
+ OPTION_ARC6,
+ OPTION_ARC7,
+ OPTION_ARC8,
+ OPTION_ARC
+};
+
+struct option md_longopts[] =
+{
{ "EB", no_argument, NULL, OPTION_EB },
-#define OPTION_EL (OPTION_MD_BASE + 1)
{ "EL", no_argument, NULL, OPTION_EL },
-#define OPTION_ARC5 (OPTION_MD_BASE + 2)
{ "marc5", no_argument, NULL, OPTION_ARC5 },
{ "pre-v6", no_argument, NULL, OPTION_ARC5 },
-#define OPTION_ARC6 (OPTION_MD_BASE + 3)
{ "marc6", no_argument, NULL, OPTION_ARC6 },
-#define OPTION_ARC7 (OPTION_MD_BASE + 4)
{ "marc7", no_argument, NULL, OPTION_ARC7 },
-#define OPTION_ARC8 (OPTION_MD_BASE + 5)
{ "marc8", no_argument, NULL, OPTION_ARC8 },
-#define OPTION_ARC (OPTION_MD_BASE + 6)
{ "marc", no_argument, NULL, OPTION_ARC },
{ NULL, no_argument, NULL, 0 }
};
See if it's a processor-specific option. */
int
-md_parse_option (c, arg)
- int c;
- char *arg ATTRIBUTE_UNUSED;
+md_parse_option (int c, char *arg ATTRIBUTE_UNUSED)
{
switch (c)
{
}
void
-md_show_usage (stream)
- FILE *stream;
+md_show_usage (FILE *stream)
{
fprintf (stream, "\
ARC Options:\n\
command. */
void
-md_begin ()
+md_begin (void)
{
/* The endianness can be chosen "at the factory". */
target_big_endian = byte_order == BIG_ENDIAN;
/* Initialize the various opcode and operand tables.
MACH is one of bfd_mach_arc_xxx. */
+
static void
-init_opcode_tables (mach)
- int mach;
+init_opcode_tables (int mach)
{
int i;
char *last;
for (i = 0; i < arc_suffixes_count; i++)
{
if (strcmp (arc_suffixes[i].name, last) != 0)
- hash_insert (arc_suffix_hash, arc_suffixes[i].name, (PTR) (arc_suffixes + i));
+ hash_insert (arc_suffix_hash, arc_suffixes[i].name, (void *) (arc_suffixes + i));
last = arc_suffixes[i].name;
}
If REG is non-NULL, it is a register number and ignore VAL. */
static arc_insn
-arc_insert_operand (insn, operand, mods, reg, val, file, line)
- arc_insn insn;
- const struct arc_operand *operand;
- int mods;
- const struct arc_operand_value *reg;
- offsetT val;
- char *file;
- unsigned int line;
+arc_insert_operand (arc_insn insn,
+ const struct arc_operand *operand,
+ int mods,
+ const struct arc_operand_value *reg,
+ offsetT val,
+ char *file,
+ unsigned int line)
{
if (operand->bits != 32)
{
test = val;
if (test < (offsetT) min || test > (offsetT) max)
- {
- const char *err =
- "operand out of range (%s not between %ld and %ld)";
- char buf[100];
-
- sprint_value (buf, test);
- if (file == (char *) NULL)
- as_warn (err, buf, min, max);
- else
- as_warn_where (file, line, err, buf, min, max);
- }
+ as_warn_value_out_of_range (_("operand"), test, (offsetT) min, (offsetT) max, file, line);
}
if (operand->insert)
we go, because that would require us to first create the frag, and
that would screw up references to ``.''. */
-struct arc_fixup {
+struct arc_fixup
+{
/* index into `arc_operands' */
int opindex;
expressionS exp;
#define MAX_SUFFIXES 5
-/* This routine is called for each instruction to be assembled. */
+/* Compute the reloc type of an expression.
+ The possibly modified expression is stored in EXPNEW.
-void
-md_assemble (str)
- char *str;
+ This is used to convert the expressions generated by the %-op's into
+ the appropriate operand type. It is called for both data in instructions
+ (operands) and data outside instructions (variables, debugging info, etc.).
+
+ Currently supported %-ops:
+
+ %st(symbol): represented as "symbol >> 2"
+ "st" is short for STatus as in the status register (pc)
+
+ DEFAULT_TYPE is the type to use if no special processing is required.
+
+ DATA_P is non-zero for data or limm values, zero for insn operands.
+ Remember that the opcode "insertion fns" cannot be used on data, they're
+ only for inserting operands into insns. They also can't be used for limm
+ values as the insertion routines don't handle limm values. When called for
+ insns we return fudged reloc types (real_value - BFD_RELOC_UNUSED). When
+ called for data or limm values we use real reloc types. */
+
+static int
+get_arc_exp_reloc_type (int data_p,
+ int default_type,
+ expressionS *exp,
+ expressionS *expnew)
{
- const struct arc_opcode *opcode;
- const struct arc_opcode *std_opcode;
- struct arc_opcode *ext_opcode;
- char *start;
- const char *last_errmsg = 0;
- arc_insn insn;
- static int init_tables_p = 0;
+ /* If the expression is "symbol >> 2" we must change it to just "symbol",
+ as fix_new_exp can't handle it. Similarly for (symbol - symbol) >> 2.
+ That's ok though. What's really going on here is that we're using
+ ">> 2" as a special syntax for specifying BFD_RELOC_ARC_B26. */
- /* Opcode table initialization is deferred until here because we have to
- wait for a possible .option command. */
- if (!init_tables_p)
+ if (exp->X_op == O_right_shift
+ && exp->X_op_symbol != NULL
+ && exp->X_op_symbol->sy_value.X_op == O_constant
+ && exp->X_op_symbol->sy_value.X_add_number == 2
+ && exp->X_add_number == 0)
{
- init_opcode_tables (arc_mach_type);
- init_tables_p = 1;
+ if (exp->X_add_symbol != NULL
+ && (exp->X_add_symbol->sy_value.X_op == O_constant
+ || exp->X_add_symbol->sy_value.X_op == O_symbol))
+ {
+ *expnew = *exp;
+ expnew->X_op = O_symbol;
+ expnew->X_op_symbol = NULL;
+ return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J'];
+ }
+ else if (exp->X_add_symbol != NULL
+ && exp->X_add_symbol->sy_value.X_op == O_subtract)
+ {
+ *expnew = exp->X_add_symbol->sy_value;
+ return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J'];
+ }
}
- /* Skip leading white space. */
- while (isspace (*str))
- str++;
+ *expnew = *exp;
+ return default_type;
+}
+\f
+static int
+arc_set_ext_seg (void)
+{
+ if (!arcext_section)
+ {
+ arcext_section = subseg_new (".arcextmap", 0);
+ bfd_set_section_flags (stdoutput, arcext_section,
+ SEC_READONLY | SEC_HAS_CONTENTS);
+ }
+ else
+ subseg_set (arcext_section, 0);
+ return 1;
+}
- /* The instructions are stored in lists hashed by the first letter (though
- we needn't care how they're hashed). Get the first in the list. */
+static void
+arc_extoper (int opertype)
+{
+ char *name;
+ char *mode;
+ char c;
+ char *p;
+ int imode = 0;
+ int number;
+ struct arc_ext_operand_value *ext_oper;
+ symbolS *symbolP;
- ext_opcode = arc_ext_opcodes;
- std_opcode = arc_opcode_lookup_asm (str);
+ segT old_sec;
+ int old_subsec;
- /* Keep looking until we find a match. */
+ name = input_line_pointer;
+ c = get_symbol_end ();
+ name = xstrdup (name);
- start = str;
- for (opcode = (ext_opcode ? ext_opcode : std_opcode);
- opcode != NULL;
- opcode = (ARC_OPCODE_NEXT_ASM (opcode)
- ? ARC_OPCODE_NEXT_ASM (opcode)
- : (ext_opcode ? ext_opcode = NULL, std_opcode : NULL)))
+ p = name;
+ while (*p)
{
- int past_opcode_p, fc, num_suffixes;
- int fix_up_at = 0;
- char *syn;
- struct arc_fixup fixups[MAX_FIXUPS];
- /* Used as a sanity check. If we need a limm reloc, make sure we ask
- for an extra 4 bytes from frag_more. */
- int limm_reloc_p;
- int ext_suffix_p;
- const struct arc_operand_value *insn_suffixes[MAX_SUFFIXES];
+ *p = TOLOWER (*p);
+ p++;
+ }
- /* Is this opcode supported by the selected cpu? */
- if (! arc_opcode_supported (opcode))
- continue;
+ /* just after name is now '\0' */
+ p = input_line_pointer;
+ *p = c;
+ SKIP_WHITESPACE ();
- /* Scan the syntax string. If it doesn't match, try the next one. */
+ if (*input_line_pointer != ',')
+ {
+ as_bad ("expected comma after operand name");
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ }
- arc_opcode_init_insert ();
- insn = opcode->value;
- fc = 0;
- past_opcode_p = 0;
- num_suffixes = 0;
- limm_reloc_p = 0;
- ext_suffix_p = 0;
+ input_line_pointer++; /* skip ',' */
+ number = get_absolute_expression ();
- /* We don't check for (*str != '\0') here because we want to parse
- any trailing fake arguments in the syntax string. */
- for (str = start, syn = opcode->syntax; *syn != '\0';)
+ if (number < 0)
+ {
+ as_bad ("negative operand number %d", number);
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ }
+
+ if (opertype)
+ {
+ SKIP_WHITESPACE ();
+
+ if (*input_line_pointer != ',')
{
- int mods;
- const struct arc_operand *operand;
+ as_bad ("expected comma after register-number");
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ }
- /* Non operand chars must match exactly. */
- if (*syn != '%' || *++syn == '%')
+ input_line_pointer++; /* skip ',' */
+ mode = input_line_pointer;
+
+ if (!strncmp (mode, "r|w", 3))
+ {
+ imode = 0;
+ input_line_pointer += 3;
+ }
+ else
+ {
+ if (!strncmp (mode, "r", 1))
+ {
+ imode = ARC_REGISTER_READONLY;
+ input_line_pointer += 1;
+ }
+ else
{
- /* Handle '+' specially as we want to allow "ld r0,[sp-4]". */
- /* ??? The syntax has changed to [sp,-4]. */
- if (0 && *syn == '+' && *str == '-')
+ if (strncmp (mode, "w", 1))
{
- /* Skip over syn's +, but leave str's - alone.
- That makes the case identical to "ld r0,[sp+-4]". */
- ++syn;
+ as_bad ("invalid mode");
+ ignore_rest_of_line ();
+ free (name);
+ return;
}
- else if (*str == *syn)
+ else
{
- if (*syn == ' ')
- past_opcode_p = 1;
- ++syn;
- ++str;
+ imode = ARC_REGISTER_WRITEONLY;
+ input_line_pointer += 1;
}
- else
- break;
- continue;
}
-
- /* We have an operand. Pick out any modifiers. */
- mods = 0;
- while (ARC_MOD_P (arc_operands[arc_operand_map[(int) *syn]].flags))
+ }
+ SKIP_WHITESPACE ();
+ if (1 == opertype)
+ {
+ if (*input_line_pointer != ',')
{
- mods |= arc_operands[arc_operand_map[(int) *syn]].flags & ARC_MOD_BITS;
- ++syn;
+ as_bad ("expected comma after register-mode");
+ ignore_rest_of_line ();
+ free (name);
+ return;
}
- operand = arc_operands + arc_operand_map[(int) *syn];
- if (operand->fmt == 0)
- as_fatal ("unknown syntax format character `%c'", *syn);
- if (operand->flags & ARC_OPERAND_FAKE)
+ input_line_pointer++; /* skip ',' */
+
+ if (!strncmp (input_line_pointer, "cannot_shortcut", 15))
{
- const char *errmsg = NULL;
- if (operand->insert)
- {
- insn = (*operand->insert) (insn, operand, mods, NULL, 0, &errmsg);
- if (errmsg != (const char *) NULL)
- {
- last_errmsg = errmsg;
- if (operand->flags & ARC_OPERAND_ERROR)
- {
- as_bad (errmsg);
- return;
- }
- else if (operand->flags & ARC_OPERAND_WARN)
- as_warn (errmsg);
- break;
- }
- if (limm_reloc_p
- && (operand->flags && operand->flags & ARC_OPERAND_LIMM)
- && (operand->flags &
- (ARC_OPERAND_ABSOLUTE_BRANCH | ARC_OPERAND_ADDRESS)))
- {
- fixups[fix_up_at].opindex = arc_operand_map[operand->fmt];
- }
- }
- ++syn;
+ imode |= arc_get_noshortcut_flag ();
+ input_line_pointer += 15;
}
- /* Are we finished with suffixes? */
- else if (!past_opcode_p)
+ else
{
- int found;
- char c;
- char *s, *t;
- const struct arc_operand_value *suf, *suffix_end;
- const struct arc_operand_value *suffix = NULL;
-
- if (!(operand->flags & ARC_OPERAND_SUFFIX))
- abort ();
-
- /* If we're at a space in the input string, we want to skip the
- remaining suffixes. There may be some fake ones though, so
- just go on to try the next one. */
- if (*str == ' ')
- {
- ++syn;
- continue;
- }
-
- s = str;
- if (mods & ARC_MOD_DOT)
+ if (strncmp (input_line_pointer, "can_shortcut", 12))
{
- if (*s != '.')
- break;
- ++s;
+ as_bad ("shortcut designator invalid");
+ ignore_rest_of_line ();
+ free (name);
+ return;
}
else
{
- /* This can happen in "b.nd foo" and we're currently looking
- for "%q" (ie: a condition code suffix). */
- if (*s == '.')
- {
- ++syn;
- continue;
- }
+ input_line_pointer += 12;
}
+ }
+ }
+ }
- /* Pick the suffix out and look it up via the hash table. */
- for (t = s; *t && isalnum (*t); ++t)
- continue;
- c = *t;
- *t = '\0';
- if ((suf = get_ext_suffix (s)))
- ext_suffix_p = 1;
- else
- suf = hash_find (arc_suffix_hash, s);
- if (!suf)
- {
- /* This can happen in "blle foo" and we're currently using
- the template "b%q%.n %j". The "bl" insn occurs later in
- the table so "lle" isn't an illegal suffix. */
- *t = c;
- break;
- }
+ if ((opertype == 1) && number > 60)
+ {
+ as_bad ("core register value (%d) too large", number);
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ }
- /* Is it the right type? Note that the same character is used
- several times, so we have to examine all of them. This is
- relatively efficient as equivalent entries are kept
- together. If it's not the right type, don't increment `str'
- so we try the next one in the series. */
- found = 0;
- if (ext_suffix_p && arc_operands[suf->type].fmt == *syn)
- {
- /* Insert the suffix's value into the insn. */
- *t = c;
- if (operand->insert)
- insn = (*operand->insert) (insn, operand,
- mods, NULL, suf->value,
- NULL);
- else
- insn |= suf->value << operand->shift;
+ if ((opertype == 0) && number > 31)
+ {
+ as_bad ("condition code value (%d) too large", number);
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ }
- str = t;
- found = 1;
- }
- else
- {
- *t = c;
- suffix_end = arc_suffixes + arc_suffixes_count;
- for (suffix = suf;
- suffix < suffix_end && strcmp (suffix->name, suf->name) == 0;
- ++suffix)
- {
- if (arc_operands[suffix->type].fmt == *syn)
- {
- /* Insert the suffix's value into the insn. */
- if (operand->insert)
- insn = (*operand->insert) (insn, operand,
- mods, NULL, suffix->value,
- NULL);
- else
- insn |= suffix->value << operand->shift;
+ ext_oper = xmalloc (sizeof (struct arc_ext_operand_value));
- str = t;
- found = 1;
- break;
- }
- }
- }
- ++syn;
- if (!found)
- /* Wrong type. Just go on to try next insn entry. */
- ;
- else
- {
- if (num_suffixes == MAX_SUFFIXES)
- as_bad ("too many suffixes");
- else
- insn_suffixes[num_suffixes++] = suffix;
- }
- }
+ if (opertype)
+ {
+ /* If the symbol already exists, point it at the new definition. */
+ if ((symbolP = symbol_find (name)))
+ {
+ if (S_GET_SEGMENT (symbolP) == reg_section)
+ S_SET_VALUE (symbolP, (int) &ext_oper->operand);
else
- /* This is either a register or an expression of some kind. */
{
- char *hold;
- const struct arc_operand_value *reg = NULL;
- long value = 0;
- expressionS exp;
+ as_bad ("attempt to override symbol: %s", name);
+ ignore_rest_of_line ();
+ free (name);
+ free (ext_oper);
+ return;
+ }
+ }
+ else
+ {
+ /* If its not there, add it. */
+ symbol_table_insert (symbol_create (name, reg_section,
+ (int) &ext_oper->operand, &zero_address_frag));
+ }
+ }
- if (operand->flags & ARC_OPERAND_SUFFIX)
- abort ();
+ ext_oper->operand.name = name;
+ ext_oper->operand.value = number;
+ ext_oper->operand.type = arc_operand_type (opertype);
+ ext_oper->operand.flags = imode;
- /* Is there anything left to parse?
- We don't check for this at the top because we want to parse
- any trailing fake arguments in the syntax string. */
- if (is_end_of_line[(unsigned char) *str])
- break;
+ ext_oper->next = arc_ext_operands;
+ arc_ext_operands = ext_oper;
- /* Parse the operand. */
- hold = input_line_pointer;
- input_line_pointer = str;
- expression (&exp);
- str = input_line_pointer;
- input_line_pointer = hold;
+ /* OK, now that we know what this operand is, put a description in
+ the arc extension section of the output file. */
- if (exp.X_op == O_illegal)
- as_bad ("illegal operand");
- else if (exp.X_op == O_absent)
- as_bad ("missing operand");
- else if (exp.X_op == O_constant)
- {
- value = exp.X_add_number;
- }
- else if (exp.X_op == O_register)
- {
- reg = (struct arc_operand_value *) exp.X_add_number;
- }
-#define IS_REG_DEST_OPERAND(o) ((o) == 'a')
- else if (IS_REG_DEST_OPERAND (*syn))
- as_bad ("symbol as destination register");
- else
- {
- if (!strncmp (str, "@h30", 4))
- {
- arc_code_symbol (&exp);
- str += 4;
- }
- /* We need to generate a fixup for this expression. */
- if (fc >= MAX_FIXUPS)
- as_fatal ("too many fixups");
- fixups[fc].exp = exp;
- /* We don't support shimm relocs. break here to force
- the assembler to output a limm. */
-#define IS_REG_SHIMM_OFFSET(o) ((o) == 'd')
- if (IS_REG_SHIMM_OFFSET (*syn))
- break;
- /* If this is a register constant (IE: one whose
- register value gets stored as 61-63) then this
- must be a limm. */
- /* ??? This bit could use some cleaning up.
- Referencing the format chars like this goes
- against style. */
- if (IS_SYMBOL_OPERAND (*syn))
- {
- const char *junk;
- limm_reloc_p = 1;
- /* Save this, we don't yet know what reloc to use. */
- fix_up_at = fc;
- /* Tell insert_reg we need a limm. This is
- needed because the value at this point is
- zero, a shimm. */
- /* ??? We need a cleaner interface than this. */
- (*arc_operands[arc_operand_map['Q']].insert)
- (insn, operand, mods, reg, 0L, &junk);
- }
- else
- fixups[fc].opindex = arc_operand_map[(int) *syn];
- ++fc;
- value = 0;
- }
+ old_sec = now_seg;
+ old_subsec = now_subseg;
- /* Insert the register or expression into the instruction. */
- if (operand->insert)
- {
- const char *errmsg = NULL;
- insn = (*operand->insert) (insn, operand, mods,
- reg, (long) value, &errmsg);
- if (errmsg != (const char *) NULL)
- {
- last_errmsg = errmsg;
- if (operand->flags & ARC_OPERAND_ERROR)
- {
- as_bad (errmsg);
- return;
- }
- else if (operand->flags & ARC_OPERAND_WARN)
- as_warn (errmsg);
- break;
- }
- }
- else
- insn |= (value & ((1 << operand->bits) - 1)) << operand->shift;
-
- ++syn;
- }
- }
-
- /* If we're at the end of the syntax string, we're done. */
- /* FIXME: try to move this to a separate function. */
- if (*syn == '\0')
- {
- int i;
- char *f;
- long limm, limm_p;
-
- /* For the moment we assume a valid `str' can only contain blanks
- now. IE: We needn't try again with a longer version of the
- insn and it is assumed that longer versions of insns appear
- before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
-
- while (isspace (*str))
- ++str;
-
- if (!is_end_of_line[(unsigned char) *str])
- as_bad ("junk at end of line: `%s'", str);
-
- /* Is there a limm value? */
- limm_p = arc_opcode_limm_p (&limm);
-
- /* Perform various error and warning tests. */
-
- {
- static int in_delay_slot_p = 0;
- static int prev_insn_needs_cc_nop_p = 0;
- /* delay slot type seen */
- int delay_slot_type = ARC_DELAY_NONE;
- /* conditional execution flag seen */
- int conditional = 0;
- /* 1 if condition codes are being set */
- int cc_set_p = 0;
- /* 1 if conditional branch, including `b' "branch always" */
- int cond_branch_p = opcode->flags & ARC_OPCODE_COND_BRANCH;
-
- for (i = 0; i < num_suffixes; ++i)
- {
- switch (arc_operands[insn_suffixes[i]->type].fmt)
- {
- case 'n':
- delay_slot_type = insn_suffixes[i]->value;
- break;
- case 'q':
- conditional = insn_suffixes[i]->value;
- break;
- case 'f':
- cc_set_p = 1;
- break;
- }
- }
-
- /* Putting an insn with a limm value in a delay slot is supposed to
- be legal, but let's warn the user anyway. Ditto for 8 byte
- jumps with delay slots. */
- if (in_delay_slot_p && limm_p)
- as_warn ("8 byte instruction in delay slot");
- if (delay_slot_type != ARC_DELAY_NONE
- && limm_p && arc_insn_not_jl (insn)) /* except for jl addr */
- as_warn ("8 byte jump instruction with delay slot");
- in_delay_slot_p = (delay_slot_type != ARC_DELAY_NONE) && !limm_p;
-
- /* Warn when a conditional branch immediately follows a set of
- the condition codes. Note that this needn't be done if the
- insn that sets the condition codes uses a limm. */
- if (cond_branch_p && conditional != 0 /* 0 = "always" */
- && prev_insn_needs_cc_nop_p && arc_mach_type == bfd_mach_arc_5)
- as_warn ("conditional branch follows set of flags");
- prev_insn_needs_cc_nop_p =
- /* FIXME: ??? not required:
- (delay_slot_type != ARC_DELAY_NONE) && */
- cc_set_p && !limm_p;
- }
-
- /* Write out the instruction.
- It is important to fetch enough space in one call to `frag_more'.
- We use (f - frag_now->fr_literal) to compute where we are and we
- don't want frag_now to change between calls. */
- if (limm_p)
- {
- f = frag_more (8);
- md_number_to_chars (f, insn, 4);
- md_number_to_chars (f + 4, limm, 4);
- dwarf2_emit_insn (8);
- }
- else if (limm_reloc_p)
- {
- /* We need a limm reloc, but the tables think we don't. */
- abort ();
- }
- else
- {
- f = frag_more (4);
- md_number_to_chars (f, insn, 4);
- dwarf2_emit_insn (4);
- }
-
- /* Create any fixups. */
- for (i = 0; i < fc; ++i)
- {
- int op_type, reloc_type;
- expressionS exptmp;
- const struct arc_operand *operand;
-
- /* Create a fixup for this operand.
- At this point we do not use a bfd_reloc_code_real_type for
- operands residing in the insn, but instead just use the
- operand index. This lets us easily handle fixups for any
- operand type, although that is admittedly not a very exciting
- feature. We pick a BFD reloc type in md_apply_fix.
-
- Limm values (4 byte immediate "constants") must be treated
- normally because they're not part of the actual insn word
- and thus the insertion routines don't handle them. */
+ arc_set_ext_seg ();
- if (arc_operands[fixups[i].opindex].flags & ARC_OPERAND_LIMM)
- {
- /* Modify the fixup addend as required by the cpu. */
- fixups[i].exp.X_add_number += arc_limm_fixup_adjust (insn);
- op_type = fixups[i].opindex;
- /* FIXME: can we add this data to the operand table? */
- if (op_type == arc_operand_map['L']
- || op_type == arc_operand_map['s']
- || op_type == arc_operand_map['o']
- || op_type == arc_operand_map['O'])
- reloc_type = BFD_RELOC_32;
- else if (op_type == arc_operand_map['J'])
- reloc_type = BFD_RELOC_ARC_B26;
- else
- abort ();
- reloc_type = get_arc_exp_reloc_type (1, reloc_type,
- &fixups[i].exp,
- &exptmp);
- }
- else
- {
- op_type = get_arc_exp_reloc_type (0, fixups[i].opindex,
- &fixups[i].exp, &exptmp);
- reloc_type = op_type + (int) BFD_RELOC_UNUSED;
- }
- operand = &arc_operands[op_type];
- fix_new_exp (frag_now,
- ((f - frag_now->fr_literal)
- + (operand->flags & ARC_OPERAND_LIMM ? 4 : 0)), 4,
- &exptmp,
- (operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0,
- (bfd_reloc_code_real_type) reloc_type);
- }
+ switch (opertype)
+ {
+ case 0:
+ p = frag_more (1);
+ *p = 3 + strlen (name) + 1;
+ p = frag_more (1);
+ *p = EXT_COND_CODE;
+ p = frag_more (1);
+ *p = number;
+ p = frag_more (strlen (name) + 1);
+ strcpy (p, name);
+ break;
+ case 1:
+ p = frag_more (1);
+ *p = 3 + strlen (name) + 1;
+ p = frag_more (1);
+ *p = EXT_CORE_REGISTER;
+ p = frag_more (1);
+ *p = number;
+ p = frag_more (strlen (name) + 1);
+ strcpy (p, name);
+ break;
+ case 2:
+ p = frag_more (1);
+ *p = 6 + strlen (name) + 1;
+ p = frag_more (1);
+ *p = EXT_AUX_REGISTER;
+ p = frag_more (1);
+ *p = number >> 24 & 0xff;
+ p = frag_more (1);
+ *p = number >> 16 & 0xff;
+ p = frag_more (1);
+ *p = number >> 8 & 0xff;
+ p = frag_more (1);
+ *p = number & 0xff;
+ p = frag_more (strlen (name) + 1);
+ strcpy (p, name);
+ break;
+ default:
+ as_bad ("invalid opertype");
+ ignore_rest_of_line ();
+ free (name);
+ return;
+ break;
+ }
- /* All done. */
- return;
- }
+ subseg_set (old_sec, old_subsec);
- /* Try the next entry. */
- }
+ /* Enter all registers into the symbol table. */
- if (NULL == last_errmsg)
- as_bad ("bad instruction `%s'", start);
- else
- as_bad (last_errmsg);
+ demand_empty_rest_of_line ();
}
-\f
+
static void
-arc_extoper (opertype)
- int opertype;
+arc_extinst (int ignore ATTRIBUTE_UNUSED)
{
+ char syntax[129];
char *name;
- char *mode;
- char c;
char *p;
- int imode = 0;
- int number;
- struct arc_ext_operand_value *ext_oper;
- symbolS *symbolP;
+ char c;
+ int suffixcode = -1;
+ int opcode, subopcode;
+ int i;
+ int class = 0;
+ int name_len;
+ struct arc_opcode *ext_op;
segT old_sec;
int old_subsec;
name = input_line_pointer;
c = get_symbol_end ();
name = xstrdup (name);
- if (NULL == name)
- {
- ignore_rest_of_line ();
- return;
- }
-
- p = name;
- while (*p)
- {
- if (isupper (*p))
- *p = tolower (*p);
- p++;
- }
+ strcpy (syntax, name);
+ name_len = strlen (name);
/* just after name is now '\0' */
p = input_line_pointer;
*p = c;
+
SKIP_WHITESPACE ();
if (*input_line_pointer != ',')
{
as_bad ("expected comma after operand name");
ignore_rest_of_line ();
- free (name);
return;
}
input_line_pointer++; /* skip ',' */
- number = get_absolute_expression ();
-
- if (number < 0)
- {
- as_bad ("negative operand number %d", number);
- ignore_rest_of_line ();
- free (name);
- return;
- }
-
- if (opertype)
- {
- SKIP_WHITESPACE ();
-
- if (*input_line_pointer != ',')
- {
- as_bad ("expected comma after register-number");
- ignore_rest_of_line ();
- free (name);
- return;
- }
-
- input_line_pointer++; /* skip ',' */
- mode = input_line_pointer;
-
- if (!strncmp (mode, "r|w", 3))
- {
- imode = 0;
- input_line_pointer += 3;
- }
- else
- {
- if (!strncmp (mode, "r", 1))
- {
- imode = ARC_REGISTER_READONLY;
- input_line_pointer += 1;
- }
- else
- {
- if (strncmp (mode, "w", 1))
- {
- as_bad ("invalid mode");
- ignore_rest_of_line ();
- free (name);
- return;
- }
- else
- {
- imode = ARC_REGISTER_WRITEONLY;
- input_line_pointer += 1;
- }
- }
- }
- SKIP_WHITESPACE ();
- if (1 == opertype)
- {
- if (*input_line_pointer != ',')
- {
- as_bad ("expected comma after register-mode");
- ignore_rest_of_line ();
- free (name);
- return;
- }
-
- input_line_pointer++; /* skip ',' */
-
- if (!strncmp (input_line_pointer, "cannot_shortcut", 15))
- {
- imode |= arc_get_noshortcut_flag ();
- input_line_pointer += 15;
- }
- else
- {
- if (strncmp (input_line_pointer, "can_shortcut", 12))
- {
- as_bad ("shortcut designator invalid");
- ignore_rest_of_line ();
- free (name);
- return;
- }
- else
- {
- input_line_pointer += 12;
- }
- }
- }
- }
-
- if ((opertype == 1) && number > 60)
- {
- as_bad ("core register value (%d) too large", number);
- ignore_rest_of_line ();
- free (name);
- return;
- }
-
- if ((opertype == 0) && number > 31)
- {
- as_bad ("condition code value (%d) too large", number);
- ignore_rest_of_line ();
- free (name);
- return;
- }
-
- ext_oper = (struct arc_ext_operand_value *) \
- xmalloc (sizeof (struct arc_ext_operand_value));
-
- if (opertype)
- {
- /* If the symbol already exists, point it at the new definition. */
- if ((symbolP = symbol_find (name)))
- {
- if (S_GET_SEGMENT (symbolP) == reg_section)
- S_SET_VALUE (symbolP, (int) &ext_oper->operand);
- else
- {
- as_bad ("attempt to override symbol: %s", name);
- ignore_rest_of_line ();
- free (name);
- free (ext_oper);
- return;
- }
- }
- else
- {
- /* If its not there, add it. */
- symbol_table_insert (symbol_create (name, reg_section,
- (int) &ext_oper->operand, &zero_address_frag));
- }
- }
-
- ext_oper->operand.name = name;
- ext_oper->operand.value = number;
- ext_oper->operand.type = arc_operand_type (opertype);
- ext_oper->operand.flags = imode;
-
- ext_oper->next = arc_ext_operands;
- arc_ext_operands = ext_oper;
-
- /* OK, now that we know what this operand is, put a description in
- the arc extension section of the output file. */
-
- old_sec = now_seg;
- old_subsec = now_subseg;
-
- arc_set_ext_seg ();
-
- switch (opertype)
- {
- case 0:
- p = frag_more (1);
- *p = 3 + strlen (name) + 1;
- p = frag_more (1);
- *p = EXT_COND_CODE;
- p = frag_more (1);
- *p = number;
- p = frag_more (strlen (name) + 1);
- strcpy (p, name);
- break;
- case 1:
- p = frag_more (1);
- *p = 3 + strlen (name) + 1;
- p = frag_more (1);
- *p = EXT_CORE_REGISTER;
- p = frag_more (1);
- *p = number;
- p = frag_more (strlen (name) + 1);
- strcpy (p, name);
- break;
- case 2:
- p = frag_more (1);
- *p = 6 + strlen (name) + 1;
- p = frag_more (1);
- *p = EXT_AUX_REGISTER;
- p = frag_more (1);
- *p = number >> 24 & 0xff;
- p = frag_more (1);
- *p = number >> 16 & 0xff;
- p = frag_more (1);
- *p = number >> 8 & 0xff;
- p = frag_more (1);
- *p = number & 0xff;
- p = frag_more (strlen (name) + 1);
- strcpy (p, name);
- break;
- default:
- as_bad ("invalid opertype");
- ignore_rest_of_line ();
- free (name);
- return;
- break;
- }
-
- subseg_set (old_sec, old_subsec);
-
- /* Enter all registers into the symbol table. */
-
- demand_empty_rest_of_line ();
-}
-
-static void
-arc_extinst (ignore)
- int ignore ATTRIBUTE_UNUSED;
-{
- unsigned char syntax[129];
- char *name;
- char *p;
- char c;
- int suffixcode = -1;
- int opcode, subopcode;
- int i;
- int class = 0;
- int name_len;
- struct arc_opcode *ext_op;
-
- segT old_sec;
- int old_subsec;
-
- name = input_line_pointer;
- c = get_symbol_end ();
- name = xstrdup (name);
- if (NULL == name)
- {
- ignore_rest_of_line ();
- return;
- }
- strcpy (syntax, name);
- name_len = strlen (name);
-
- /* just after name is now '\0' */
- p = input_line_pointer;
- *p = c;
-
- SKIP_WHITESPACE ();
-
- if (*input_line_pointer != ',')
- {
- as_bad ("expected comma after operand name");
- ignore_rest_of_line ();
- return;
- }
-
- input_line_pointer++; /* skip ',' */
- opcode = get_absolute_expression ();
+ opcode = get_absolute_expression ();
SKIP_WHITESPACE ();
strcat (syntax, "%F");
strcat (syntax, "%S%L");
- ext_op = (struct arc_opcode *) xmalloc (sizeof (struct arc_opcode));
- if (NULL == ext_op)
- {
- ignore_rest_of_line ();
- return;
- }
-
+ ext_op = xmalloc (sizeof (struct arc_opcode));
ext_op->syntax = xstrdup (syntax);
- if (NULL == ext_op->syntax)
- {
- ignore_rest_of_line ();
- return;
- }
ext_op->mask = I (-1) | ((0x3 == opcode) ? C (-1) : 0);
ext_op->value = I (opcode) | ((0x3 == opcode) ? C (subopcode) : 0);
demand_empty_rest_of_line ();
}
-int
-arc_set_ext_seg ()
-{
- if (!arcext_section)
- {
- arcext_section = subseg_new (".arcextmap", 0);
- bfd_set_section_flags (stdoutput, arcext_section,
- SEC_READONLY | SEC_HAS_CONTENTS);
- }
- else
- subseg_set (arcext_section, 0);
- return 1;
-}
-
static void
-arc_common (localScope)
- int localScope;
+arc_common (int localScope)
{
char *name;
char c;
symbolP->bsym->flags |= BSF_OBJECT;
demand_empty_rest_of_line ();
- return;
}
\f
/* Select the cpu we're assembling for. */
static void
-arc_option (ignore)
- int ignore ATTRIBUTE_UNUSED;
+arc_option (int ignore ATTRIBUTE_UNUSED)
{
+ extern int arc_get_mach (char *);
int mach;
char c;
char *cpu;
#define MAX_LITTLENUMS 6
char *
-md_atof (type, litP, sizeP)
- char type;
- char *litP;
- int *sizeP;
+md_atof (int type, char *litP, int *sizeP)
{
int prec;
LITTLENUM_TYPE words[MAX_LITTLENUMS];
LITTLENUM_TYPE *wordP;
char *t;
- char *atof_ieee ();
switch (type)
{
endianness. */
void
-md_number_to_chars (buf, val, n)
- char *buf;
- valueT val;
- int n;
+md_number_to_chars (char *buf, valueT val, int n)
{
if (target_big_endian)
number_to_chars_bigendian (buf, val, n);
/* Round up a section size to the appropriate boundary. */
valueT
-md_section_align (segment, size)
- segT segment;
- valueT size;
+md_section_align (segT segment, valueT size)
{
int align = bfd_get_section_alignment (stdoutput, segment);
/* We don't have any form of relaxing. */
int
-md_estimate_size_before_relax (fragp, seg)
- fragS *fragp ATTRIBUTE_UNUSED;
- asection *seg ATTRIBUTE_UNUSED;
+md_estimate_size_before_relax (fragS *fragp ATTRIBUTE_UNUSED,
+ asection *seg ATTRIBUTE_UNUSED)
{
as_fatal (_("md_estimate_size_before_relax\n"));
return 1;
/* Convert a machine dependent frag. We never generate these. */
void
-md_convert_frag (abfd, sec, fragp)
- bfd *abfd ATTRIBUTE_UNUSED;
- asection *sec ATTRIBUTE_UNUSED;
- fragS *fragp ATTRIBUTE_UNUSED;
+md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *sec ATTRIBUTE_UNUSED,
+ fragS *fragp ATTRIBUTE_UNUSED)
{
as_fatal (_("md_convert_frag\n"));
}
-void
-arc_code_symbol (expressionP)
- expressionS *expressionP;
+static void
+arc_code_symbol (expressionS *expressionP)
{
- if (expressionP->X_op == O_symbol && expressionP->X_add_number == 0
- /* I think this test is unnecessary but just as a sanity check... */
- && expressionP->X_op_symbol == NULL)
+ if (expressionP->X_op == O_symbol && expressionP->X_add_number == 0)
{
expressionS two;
+
expressionP->X_op = O_right_shift;
expressionP->X_add_symbol->sy_value.X_op = O_constant;
two.X_op = O_constant;
&& expressionP->X_add_number == 0)
{
expressionS two;
+
expressionP->X_add_symbol = make_expr_symbol (expressionP);
expressionP->X_op = O_right_shift;
two.X_op = O_constant;
expressionP->X_op_symbol = make_expr_symbol (&two);
}
else
- {
- as_bad ("expression too complex code symbol");
- return;
- }
+ as_bad ("expression too complex code symbol");
}
/* Parse an operand that is machine-specific.
to achieve the same effect. */
void
-md_operand (expressionP)
- expressionS *expressionP;
+md_operand (expressionS *expressionP)
{
char *p = input_line_pointer;
- if (*p == '%')
- if (strncmp (p, "%st(", 4) == 0)
- {
- input_line_pointer += 4;
- expression (expressionP);
- if (*input_line_pointer != ')')
- {
- as_bad ("missing ')' in %%-op");
- return;
- }
- ++input_line_pointer;
- arc_code_symbol (expressionP);
- }
- else
- {
- /* It could be a register. */
- int i, l;
- struct arc_ext_operand_value *ext_oper = arc_ext_operands;
- p++;
+ if (*p != '%')
+ return;
- while (ext_oper)
- {
- l = strlen (ext_oper->operand.name);
- if (!strncmp (p, ext_oper->operand.name, l) && !isalnum (*(p + l)))
- {
- input_line_pointer += l + 1;
- expressionP->X_op = O_register;
- expressionP->X_add_number = (int) &ext_oper->operand;
- return;
- }
- ext_oper = ext_oper->next;
- }
- for (i = 0; i < arc_reg_names_count; i++)
- {
- l = strlen (arc_reg_names[i].name);
- if (!strncmp (p, arc_reg_names[i].name, l) && !isalnum (*(p + l)))
- {
- input_line_pointer += l + 1;
- expressionP->X_op = O_register;
- expressionP->X_add_number = (int) &arc_reg_names[i];
- break;
- }
- }
- }
+ if (strncmp (p, "%st(", 4) == 0)
+ {
+ input_line_pointer += 4;
+ expression (expressionP);
+ if (*input_line_pointer != ')')
+ {
+ as_bad ("missing ')' in %%-op");
+ return;
+ }
+ ++input_line_pointer;
+ arc_code_symbol (expressionP);
+ }
+ else
+ {
+ /* It could be a register. */
+ int i, l;
+ struct arc_ext_operand_value *ext_oper = arc_ext_operands;
+ p++;
+
+ while (ext_oper)
+ {
+ l = strlen (ext_oper->operand.name);
+ if (!strncmp (p, ext_oper->operand.name, l) && !ISALNUM (*(p + l)))
+ {
+ input_line_pointer += l + 1;
+ expressionP->X_op = O_register;
+ expressionP->X_add_number = (int) &ext_oper->operand;
+ return;
+ }
+ ext_oper = ext_oper->next;
+ }
+ for (i = 0; i < arc_reg_names_count; i++)
+ {
+ l = strlen (arc_reg_names[i].name);
+ if (!strncmp (p, arc_reg_names[i].name, l) && !ISALNUM (*(p + l)))
+ {
+ input_line_pointer += l + 1;
+ expressionP->X_op = O_register;
+ expressionP->X_add_number = (int) &arc_reg_names[i];
+ break;
+ }
+ }
+ }
}
/* We have no need to default values of symbols.
them all in the symbol table to begin with. */
symbolS *
-md_undefined_symbol (name)
- char *name ATTRIBUTE_UNUSED;
+md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
{
return 0;
}
`label' will be right shifted by 2. */
void
-arc_parse_cons_expression (exp, nbytes)
- expressionS *exp;
- unsigned int nbytes ATTRIBUTE_UNUSED;
+arc_parse_cons_expression (expressionS *exp,
+ unsigned int nbytes ATTRIBUTE_UNUSED)
{
char *p = input_line_pointer;
int code_symbol_fix = 0;
/* Record a fixup for a cons expression. */
void
-arc_cons_fix_new (frag, where, nbytes, exp)
- fragS *frag;
- int where;
- int nbytes;
- expressionS *exp;
+arc_cons_fix_new (fragS *frag,
+ int where,
+ int nbytes,
+ expressionS *exp)
{
if (nbytes == 4)
{
given a PC relative reloc. */
long
-md_pcrel_from (fixP)
- fixS *fixP;
+md_pcrel_from (fixS *fixP)
{
- if (fixP->fx_addsy != (symbolS *) NULL
- && ! S_IS_DEFINED (fixP->fx_addsy))
- {
- /* The symbol is undefined. Let the linker figure it out. */
- return 0;
- }
-
/* Return the address of the delay slot. */
return fixP->fx_frag->fr_address + fixP->fx_where + fixP->fx_size;
}
-/* Compute the reloc type of an expression.
- The possibly modified expression is stored in EXPNEW.
+/* Apply a fixup to the object code. This is called for all the
+ fixups we generated by the call to fix_new_exp, above. In the call
+ above we used a reloc code which was the largest legal reloc code
+ plus the operand index. Here we undo that to recover the operand
+ index. At this point all symbol values should be fully resolved,
+ and we attempt to completely resolve the reloc. If we can not do
+ that, we determine the correct reloc code and put it back in the fixup. */
- This is used to convert the expressions generated by the %-op's into
- the appropriate operand type. It is called for both data in instructions
- (operands) and data outside instructions (variables, debugging info, etc.).
+void
+md_apply_fix3 (fixS *fixP, valueT * valP, segT seg)
+{
+ valueT value = * valP;
- Currently supported %-ops:
+ if (fixP->fx_addsy == (symbolS *) NULL)
+ fixP->fx_done = 1;
- %st(symbol): represented as "symbol >> 2"
- "st" is short for STatus as in the status register (pc)
+ else if (fixP->fx_pcrel)
+ {
+ /* Hack around bfd_install_relocation brain damage. */
+ if (S_GET_SEGMENT (fixP->fx_addsy) != seg)
+ value += md_pcrel_from (fixP);
+ }
- DEFAULT_TYPE is the type to use if no special processing is required.
+ /* We can't actually support subtracting a symbol. */
+ if (fixP->fx_subsy != NULL)
+ as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
- DATA_P is non-zero for data or limm values, zero for insn operands.
- Remember that the opcode "insertion fns" cannot be used on data, they're
- only for inserting operands into insns. They also can't be used for limm
- values as the insertion routines don't handle limm values. When called for
- insns we return fudged reloc types (real_value - BFD_RELOC_UNUSED). When
- called for data or limm values we use real reloc types. */
+ if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED)
+ {
+ int opindex;
+ const struct arc_operand *operand;
+ char *where;
+ arc_insn insn;
-static int
-get_arc_exp_reloc_type (data_p, default_type, exp, expnew)
- int data_p;
- int default_type;
- expressionS *exp;
- expressionS *expnew;
-{
- /* If the expression is "symbol >> 2" we must change it to just "symbol",
- as fix_new_exp can't handle it. Similarily for (symbol - symbol) >> 2.
- That's ok though. What's really going on here is that we're using
- ">> 2" as a special syntax for specifying BFD_RELOC_ARC_B26. */
+ opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED;
- if (exp->X_op == O_right_shift
- && exp->X_op_symbol != NULL
- && exp->X_op_symbol->sy_value.X_op == O_constant
- && exp->X_op_symbol->sy_value.X_add_number == 2
- && exp->X_add_number == 0)
- {
- if (exp->X_add_symbol != NULL
- && (exp->X_add_symbol->sy_value.X_op == O_constant
- || exp->X_add_symbol->sy_value.X_op == O_symbol))
+ operand = &arc_operands[opindex];
+
+ /* Fetch the instruction, insert the fully resolved operand
+ value, and stuff the instruction back again. */
+ where = fixP->fx_frag->fr_literal + fixP->fx_where;
+ if (target_big_endian)
+ insn = bfd_getb32 ((unsigned char *) where);
+ else
+ insn = bfd_getl32 ((unsigned char *) where);
+ insn = arc_insert_operand (insn, operand, -1, NULL, (offsetT) value,
+ fixP->fx_file, fixP->fx_line);
+ if (target_big_endian)
+ bfd_putb32 ((bfd_vma) insn, (unsigned char *) where);
+ else
+ bfd_putl32 ((bfd_vma) insn, (unsigned char *) where);
+
+ if (fixP->fx_done)
+ /* Nothing else to do here. */
+ return;
+
+ /* Determine a BFD reloc value based on the operand information.
+ We are only prepared to turn a few of the operands into relocs.
+ !!! Note that we can't handle limm values here. Since we're using
+ implicit addends the addend must be inserted into the instruction,
+ however, the opcode insertion routines currently do nothing with
+ limm values. */
+ if (operand->fmt == 'B')
{
- *expnew = *exp;
- expnew->X_op = O_symbol;
- expnew->X_op_symbol = NULL;
- return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J'];
+ assert ((operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0
+ && operand->bits == 20
+ && operand->shift == 7);
+ fixP->fx_r_type = BFD_RELOC_ARC_B22_PCREL;
}
- else if (exp->X_add_symbol != NULL
- && exp->X_add_symbol->sy_value.X_op == O_subtract)
+ else if (operand->fmt == 'J')
{
- *expnew = exp->X_add_symbol->sy_value;
- return data_p ? BFD_RELOC_ARC_B26 : arc_operand_map['J'];
+ assert ((operand->flags & ARC_OPERAND_ABSOLUTE_BRANCH) != 0
+ && operand->bits == 24
+ && operand->shift == 32);
+ fixP->fx_r_type = BFD_RELOC_ARC_B26;
+ }
+ else if (operand->fmt == 'L')
+ {
+ assert ((operand->flags & ARC_OPERAND_LIMM) != 0
+ && operand->bits == 32
+ && operand->shift == 32);
+ fixP->fx_r_type = BFD_RELOC_32;
+ }
+ else
+ {
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ "unresolved expression that must be resolved");
+ fixP->fx_done = 1;
+ return;
+ }
+ }
+ else
+ {
+ switch (fixP->fx_r_type)
+ {
+ case BFD_RELOC_8:
+ md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
+ value, 1);
+ break;
+ case BFD_RELOC_16:
+ md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
+ value, 2);
+ break;
+ case BFD_RELOC_32:
+ md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
+ value, 4);
+ break;
+ case BFD_RELOC_ARC_B26:
+ /* If !fixP->fx_done then `value' is an implicit addend.
+ We must shift it right by 2 in this case as well because the
+ linker performs the relocation and then adds this in (as opposed
+ to adding this in and then shifting right by 2). */
+ value >>= 2;
+ md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
+ value, 4);
+ break;
+ default:
+ abort ();
}
}
-
- *expnew = *exp;
- return default_type;
}
-/* Apply a fixup to the object code. This is called for all the
- fixups we generated by the call to fix_new_exp, above. In the call
- above we used a reloc code which was the largest legal reloc code
- plus the operand index. Here we undo that to recover the operand
- index. At this point all symbol values should be fully resolved,
- and we attempt to completely resolve the reloc. If we can not do
- that, we determine the correct reloc code and put it back in the fixup. */
+/* Translate internal representation of relocation info to BFD target
+ format. */
-int
-md_apply_fix3 (fixP, valueP, seg)
- fixS *fixP;
- valueT *valueP;
- segT seg;
+arelent *
+tc_gen_reloc (asection *section ATTRIBUTE_UNUSED,
+ fixS *fixP)
{
-#if 0
- char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
-#endif
- valueT value;
-
- /* FIXME FIXME FIXME: The value we are passed in *valueP includes
- the symbol values. Since we are using BFD_ASSEMBLER, if we are
- doing this relocation the code in write.c is going to call
- bfd_perform_relocation, which is also going to use the symbol
- value. That means that if the reloc is fully resolved we want to
- use *valueP since bfd_perform_relocation is not being used.
- However, if the reloc is not fully resolved we do not want to use
- *valueP, and must use fx_offset instead. However, if the reloc
- is PC relative, we do want to use *valueP since it includes the
- result of md_pcrel_from. This is confusing. */
+ arelent *reloc;
- if (fixP->fx_addsy == (symbolS *) NULL)
+ reloc = xmalloc (sizeof (arelent));
+ reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
+
+ *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy);
+ reloc->address = fixP->fx_frag->fr_address + fixP->fx_where;
+ reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type);
+ if (reloc->howto == (reloc_howto_type *) NULL)
{
- value = *valueP;
- fixP->fx_done = 1;
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ "internal error: can't export reloc type %d (`%s')",
+ fixP->fx_r_type,
+ bfd_get_reloc_code_name (fixP->fx_r_type));
+ return NULL;
}
- else if (fixP->fx_pcrel)
+
+ assert (!fixP->fx_pcrel == !reloc->howto->pc_relative);
+
+ /* Set addend to account for PC being advanced one insn before the
+ target address is computed. */
+
+ reloc->addend = (fixP->fx_pcrel ? -4 : 0);
+
+ return reloc;
+}
+
+const pseudo_typeS md_pseudo_table[] =
+{
+ { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */
+ { "comm", arc_common, 0 },
+ { "common", arc_common, 0 },
+ { "lcomm", arc_common, 1 },
+ { "lcommon", arc_common, 1 },
+ { "2byte", cons, 2 },
+ { "half", cons, 2 },
+ { "short", cons, 2 },
+ { "3byte", cons, 3 },
+ { "4byte", cons, 4 },
+ { "word", cons, 4 },
+ { "option", arc_option, 0 },
+ { "cpu", arc_option, 0 },
+ { "block", s_space, 0 },
+ { "extcondcode", arc_extoper, 0 },
+ { "extcoreregister", arc_extoper, 1 },
+ { "extauxregister", arc_extoper, 2 },
+ { "extinstruction", arc_extinst, 0 },
+ { NULL, 0, 0 },
+};
+
+/* This routine is called for each instruction to be assembled. */
+
+void
+md_assemble (char *str)
+{
+ const struct arc_opcode *opcode;
+ const struct arc_opcode *std_opcode;
+ struct arc_opcode *ext_opcode;
+ char *start;
+ const char *last_errmsg = 0;
+ arc_insn insn;
+ static int init_tables_p = 0;
+
+ /* Opcode table initialization is deferred until here because we have to
+ wait for a possible .option command. */
+ if (!init_tables_p)
{
- value = *valueP;
- /* ELF relocations are against symbols.
- If this symbol is in a different section then we need to leave it for
- the linker to deal with. Unfortunately, md_pcrel_from can't tell,
- so we have to undo it's effects here. */
- if (S_IS_DEFINED (fixP->fx_addsy)
- && S_GET_SEGMENT (fixP->fx_addsy) != seg)
- value += md_pcrel_from (fixP);
- }
- else
+ init_opcode_tables (arc_mach_type);
+ init_tables_p = 1;
+ }
+
+ /* Skip leading white space. */
+ while (ISSPACE (*str))
+ str++;
+
+ /* The instructions are stored in lists hashed by the first letter (though
+ we needn't care how they're hashed). Get the first in the list. */
+
+ ext_opcode = arc_ext_opcodes;
+ std_opcode = arc_opcode_lookup_asm (str);
+
+ /* Keep looking until we find a match. */
+ start = str;
+ for (opcode = (ext_opcode ? ext_opcode : std_opcode);
+ opcode != NULL;
+ opcode = (ARC_OPCODE_NEXT_ASM (opcode)
+ ? ARC_OPCODE_NEXT_ASM (opcode)
+ : (ext_opcode ? ext_opcode = NULL, std_opcode : NULL)))
{
- value = fixP->fx_offset;
- if (fixP->fx_subsy != (symbolS *) NULL)
+ int past_opcode_p, fc, num_suffixes;
+ int fix_up_at = 0;
+ char *syn;
+ struct arc_fixup fixups[MAX_FIXUPS];
+ /* Used as a sanity check. If we need a limm reloc, make sure we ask
+ for an extra 4 bytes from frag_more. */
+ int limm_reloc_p;
+ int ext_suffix_p;
+ const struct arc_operand_value *insn_suffixes[MAX_SUFFIXES];
+
+ /* Is this opcode supported by the selected cpu? */
+ if (! arc_opcode_supported (opcode))
+ continue;
+
+ /* Scan the syntax string. If it doesn't match, try the next one. */
+ arc_opcode_init_insert ();
+ insn = opcode->value;
+ fc = 0;
+ past_opcode_p = 0;
+ num_suffixes = 0;
+ limm_reloc_p = 0;
+ ext_suffix_p = 0;
+
+ /* We don't check for (*str != '\0') here because we want to parse
+ any trailing fake arguments in the syntax string. */
+ for (str = start, syn = opcode->syntax; *syn != '\0';)
{
- if (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section)
- value -= S_GET_VALUE (fixP->fx_subsy);
+ int mods;
+ const struct arc_operand *operand;
+
+ /* Non operand chars must match exactly. */
+ if (*syn != '%' || *++syn == '%')
+ {
+ if (*str == *syn)
+ {
+ if (*syn == ' ')
+ past_opcode_p = 1;
+ ++syn;
+ ++str;
+ }
+ else
+ break;
+ continue;
+ }
+
+ /* We have an operand. Pick out any modifiers. */
+ mods = 0;
+ while (ARC_MOD_P (arc_operands[arc_operand_map[(int) *syn]].flags))
+ {
+ mods |= arc_operands[arc_operand_map[(int) *syn]].flags & ARC_MOD_BITS;
+ ++syn;
+ }
+ operand = arc_operands + arc_operand_map[(int) *syn];
+ if (operand->fmt == 0)
+ as_fatal ("unknown syntax format character `%c'", *syn);
+
+ if (operand->flags & ARC_OPERAND_FAKE)
+ {
+ const char *errmsg = NULL;
+ if (operand->insert)
+ {
+ insn = (*operand->insert) (insn, operand, mods, NULL, 0, &errmsg);
+ if (errmsg != (const char *) NULL)
+ {
+ last_errmsg = errmsg;
+ if (operand->flags & ARC_OPERAND_ERROR)
+ {
+ as_bad (errmsg);
+ return;
+ }
+ else if (operand->flags & ARC_OPERAND_WARN)
+ as_warn (errmsg);
+ break;
+ }
+ if (limm_reloc_p
+ && (operand->flags && operand->flags & ARC_OPERAND_LIMM)
+ && (operand->flags &
+ (ARC_OPERAND_ABSOLUTE_BRANCH | ARC_OPERAND_ADDRESS)))
+ {
+ fixups[fix_up_at].opindex = arc_operand_map[operand->fmt];
+ }
+ }
+ ++syn;
+ }
+ /* Are we finished with suffixes? */
+ else if (!past_opcode_p)
+ {
+ int found;
+ char c;
+ char *s, *t;
+ const struct arc_operand_value *suf, *suffix_end;
+ const struct arc_operand_value *suffix = NULL;
+
+ if (!(operand->flags & ARC_OPERAND_SUFFIX))
+ abort ();
+
+ /* If we're at a space in the input string, we want to skip the
+ remaining suffixes. There may be some fake ones though, so
+ just go on to try the next one. */
+ if (*str == ' ')
+ {
+ ++syn;
+ continue;
+ }
+
+ s = str;
+ if (mods & ARC_MOD_DOT)
+ {
+ if (*s != '.')
+ break;
+ ++s;
+ }
+ else
+ {
+ /* This can happen in "b.nd foo" and we're currently looking
+ for "%q" (ie: a condition code suffix). */
+ if (*s == '.')
+ {
+ ++syn;
+ continue;
+ }
+ }
+
+ /* Pick the suffix out and look it up via the hash table. */
+ for (t = s; *t && ISALNUM (*t); ++t)
+ continue;
+ c = *t;
+ *t = '\0';
+ if ((suf = get_ext_suffix (s)))
+ ext_suffix_p = 1;
+ else
+ suf = hash_find (arc_suffix_hash, s);
+ if (!suf)
+ {
+ /* This can happen in "blle foo" and we're currently using
+ the template "b%q%.n %j". The "bl" insn occurs later in
+ the table so "lle" isn't an illegal suffix. */
+ *t = c;
+ break;
+ }
+
+ /* Is it the right type? Note that the same character is used
+ several times, so we have to examine all of them. This is
+ relatively efficient as equivalent entries are kept
+ together. If it's not the right type, don't increment `str'
+ so we try the next one in the series. */
+ found = 0;
+ if (ext_suffix_p && arc_operands[suf->type].fmt == *syn)
+ {
+ /* Insert the suffix's value into the insn. */
+ *t = c;
+ if (operand->insert)
+ insn = (*operand->insert) (insn, operand,
+ mods, NULL, suf->value,
+ NULL);
+ else
+ insn |= suf->value << operand->shift;
+ suffix = suf;
+ str = t;
+ found = 1;
+ }
+ else
+ {
+ *t = c;
+ suffix_end = arc_suffixes + arc_suffixes_count;
+ for (suffix = suf;
+ suffix < suffix_end && strcmp (suffix->name, suf->name) == 0;
+ ++suffix)
+ {
+ if (arc_operands[suffix->type].fmt == *syn)
+ {
+ /* Insert the suffix's value into the insn. */
+ if (operand->insert)
+ insn = (*operand->insert) (insn, operand,
+ mods, NULL, suffix->value,
+ NULL);
+ else
+ insn |= suffix->value << operand->shift;
+
+ str = t;
+ found = 1;
+ break;
+ }
+ }
+ }
+ ++syn;
+ if (!found)
+ /* Wrong type. Just go on to try next insn entry. */
+ ;
+ else
+ {
+ if (num_suffixes == MAX_SUFFIXES)
+ as_bad ("too many suffixes");
+ else
+ insn_suffixes[num_suffixes++] = suffix;
+ }
+ }
else
+ /* This is either a register or an expression of some kind. */
{
- /* We can't actually support subtracting a symbol. */
- as_bad_where (fixP->fx_file, fixP->fx_line,
- "expression too complex");
+ char *hold;
+ const struct arc_operand_value *reg = NULL;
+ long value = 0;
+ expressionS exp;
+
+ if (operand->flags & ARC_OPERAND_SUFFIX)
+ abort ();
+
+ /* Is there anything left to parse?
+ We don't check for this at the top because we want to parse
+ any trailing fake arguments in the syntax string. */
+ if (is_end_of_line[(unsigned char) *str])
+ break;
+
+ /* Parse the operand. */
+ hold = input_line_pointer;
+ input_line_pointer = str;
+ expression (&exp);
+ str = input_line_pointer;
+ input_line_pointer = hold;
+
+ if (exp.X_op == O_illegal)
+ as_bad ("illegal operand");
+ else if (exp.X_op == O_absent)
+ as_bad ("missing operand");
+ else if (exp.X_op == O_constant)
+ value = exp.X_add_number;
+ else if (exp.X_op == O_register)
+ reg = (struct arc_operand_value *) exp.X_add_number;
+#define IS_REG_DEST_OPERAND(o) ((o) == 'a')
+ else if (IS_REG_DEST_OPERAND (*syn))
+ as_bad ("symbol as destination register");
+ else
+ {
+ if (!strncmp (str, "@h30", 4))
+ {
+ arc_code_symbol (&exp);
+ str += 4;
+ }
+ /* We need to generate a fixup for this expression. */
+ if (fc >= MAX_FIXUPS)
+ as_fatal ("too many fixups");
+ fixups[fc].exp = exp;
+ /* We don't support shimm relocs. break here to force
+ the assembler to output a limm. */
+#define IS_REG_SHIMM_OFFSET(o) ((o) == 'd')
+ if (IS_REG_SHIMM_OFFSET (*syn))
+ break;
+ /* If this is a register constant (IE: one whose
+ register value gets stored as 61-63) then this
+ must be a limm. */
+ /* ??? This bit could use some cleaning up.
+ Referencing the format chars like this goes
+ against style. */
+ if (IS_SYMBOL_OPERAND (*syn))
+ {
+ const char *junk;
+ limm_reloc_p = 1;
+ /* Save this, we don't yet know what reloc to use. */
+ fix_up_at = fc;
+ /* Tell insert_reg we need a limm. This is
+ needed because the value at this point is
+ zero, a shimm. */
+ /* ??? We need a cleaner interface than this. */
+ (*arc_operands[arc_operand_map['Q']].insert)
+ (insn, operand, mods, reg, 0L, &junk);
+ }
+ else
+ fixups[fc].opindex = arc_operand_map[(int) *syn];
+ ++fc;
+ value = 0;
+ }
+
+ /* Insert the register or expression into the instruction. */
+ if (operand->insert)
+ {
+ const char *errmsg = NULL;
+ insn = (*operand->insert) (insn, operand, mods,
+ reg, (long) value, &errmsg);
+ if (errmsg != (const char *) NULL)
+ {
+ last_errmsg = errmsg;
+ if (operand->flags & ARC_OPERAND_ERROR)
+ {
+ as_bad (errmsg);
+ return;
+ }
+ else if (operand->flags & ARC_OPERAND_WARN)
+ as_warn (errmsg);
+ break;
+ }
+ }
+ else
+ insn |= (value & ((1 << operand->bits) - 1)) << operand->shift;
+
+ ++syn;
}
}
- }
- if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED)
- {
- int opindex;
- const struct arc_operand *operand;
- char *where;
- arc_insn insn;
+ /* If we're at the end of the syntax string, we're done. */
+ /* FIXME: try to move this to a separate function. */
+ if (*syn == '\0')
+ {
+ int i;
+ char *f;
+ long limm, limm_p;
- opindex = (int) fixP->fx_r_type - (int) BFD_RELOC_UNUSED;
+ /* For the moment we assume a valid `str' can only contain blanks
+ now. IE: We needn't try again with a longer version of the
+ insn and it is assumed that longer versions of insns appear
+ before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
- operand = &arc_operands[opindex];
+ while (ISSPACE (*str))
+ ++str;
- /* Fetch the instruction, insert the fully resolved operand
- value, and stuff the instruction back again. */
- where = fixP->fx_frag->fr_literal + fixP->fx_where;
- if (target_big_endian)
- insn = bfd_getb32 ((unsigned char *) where);
- else
- insn = bfd_getl32 ((unsigned char *) where);
- insn = arc_insert_operand (insn, operand, -1, NULL, (offsetT) value,
- fixP->fx_file, fixP->fx_line);
- if (target_big_endian)
- bfd_putb32 ((bfd_vma) insn, (unsigned char *) where);
- else
- bfd_putl32 ((bfd_vma) insn, (unsigned char *) where);
+ if (!is_end_of_line[(unsigned char) *str])
+ as_bad ("junk at end of line: `%s'", str);
- if (fixP->fx_done)
- {
- /* Nothing else to do here. */
- return 1;
- }
+ /* Is there a limm value? */
+ limm_p = arc_opcode_limm_p (&limm);
- /* Determine a BFD reloc value based on the operand information.
- We are only prepared to turn a few of the operands into relocs.
- !!! Note that we can't handle limm values here. Since we're using
- implicit addends the addend must be inserted into the instruction,
- however, the opcode insertion routines currently do nothing with
- limm values. */
- if (operand->fmt == 'B')
- {
- assert ((operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0
- && operand->bits == 20
- && operand->shift == 7);
- fixP->fx_r_type = BFD_RELOC_ARC_B22_PCREL;
- }
- else if (operand->fmt == 'J')
- {
- assert ((operand->flags & ARC_OPERAND_ABSOLUTE_BRANCH) != 0
- && operand->bits == 24
- && operand->shift == 32);
- fixP->fx_r_type = BFD_RELOC_ARC_B26;
- }
- else if (operand->fmt == 'L')
- {
- assert ((operand->flags & ARC_OPERAND_LIMM) != 0
- && operand->bits == 32
- && operand->shift == 32);
- fixP->fx_r_type = BFD_RELOC_32;
- }
- else
- {
- as_bad_where (fixP->fx_file, fixP->fx_line,
- "unresolved expression that must be resolved");
- fixP->fx_done = 1;
- return 1;
- }
- }
- else
- {
- switch (fixP->fx_r_type)
- {
- case BFD_RELOC_8:
- md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
- value, 1);
- break;
- case BFD_RELOC_16:
- md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
- value, 2);
- break;
- case BFD_RELOC_32:
- md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
- value, 4);
- break;
-#if 0
- case BFD_RELOC_64:
- md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
- value, 8);
- break;
-#endif
- case BFD_RELOC_ARC_B26:
- /* If !fixP->fx_done then `value' is an implicit addend.
- We must shift it right by 2 in this case as well because the
- linker performs the relocation and then adds this in (as opposed
- to adding this in and then shifting right by 2). */
- value >>= 2;
- md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
- value, 4);
- break;
- default:
- abort ();
- }
- }
+ /* Perform various error and warning tests. */
- fixP->fx_addnumber = value;
+ {
+ static int in_delay_slot_p = 0;
+ static int prev_insn_needs_cc_nop_p = 0;
+ /* delay slot type seen */
+ int delay_slot_type = ARC_DELAY_NONE;
+ /* conditional execution flag seen */
+ int conditional = 0;
+ /* 1 if condition codes are being set */
+ int cc_set_p = 0;
+ /* 1 if conditional branch, including `b' "branch always" */
+ int cond_branch_p = opcode->flags & ARC_OPCODE_COND_BRANCH;
- return 1;
-}
+ for (i = 0; i < num_suffixes; ++i)
+ {
+ switch (arc_operands[insn_suffixes[i]->type].fmt)
+ {
+ case 'n':
+ delay_slot_type = insn_suffixes[i]->value;
+ break;
+ case 'q':
+ conditional = insn_suffixes[i]->value;
+ break;
+ case 'f':
+ cc_set_p = 1;
+ break;
+ }
+ }
-/* Translate internal representation of relocation info to BFD target
- format. */
+ /* Putting an insn with a limm value in a delay slot is supposed to
+ be legal, but let's warn the user anyway. Ditto for 8 byte
+ jumps with delay slots. */
+ if (in_delay_slot_p && limm_p)
+ as_warn ("8 byte instruction in delay slot");
+ if (delay_slot_type != ARC_DELAY_NONE
+ && limm_p && arc_insn_not_jl (insn)) /* except for jl addr */
+ as_warn ("8 byte jump instruction with delay slot");
+ in_delay_slot_p = (delay_slot_type != ARC_DELAY_NONE) && !limm_p;
-arelent *
-tc_gen_reloc (section, fixP)
- asection *section ATTRIBUTE_UNUSED;
- fixS *fixP;
-{
- arelent *reloc;
+ /* Warn when a conditional branch immediately follows a set of
+ the condition codes. Note that this needn't be done if the
+ insn that sets the condition codes uses a limm. */
+ if (cond_branch_p && conditional != 0 /* 0 = "always" */
+ && prev_insn_needs_cc_nop_p && arc_mach_type == bfd_mach_arc_5)
+ as_warn ("conditional branch follows set of flags");
+ prev_insn_needs_cc_nop_p =
+ /* FIXME: ??? not required:
+ (delay_slot_type != ARC_DELAY_NONE) && */
+ cc_set_p && !limm_p;
+ }
- reloc = (arelent *) xmalloc (sizeof (arelent));
+ /* Write out the instruction.
+ It is important to fetch enough space in one call to `frag_more'.
+ We use (f - frag_now->fr_literal) to compute where we are and we
+ don't want frag_now to change between calls. */
+ if (limm_p)
+ {
+ f = frag_more (8);
+ md_number_to_chars (f, insn, 4);
+ md_number_to_chars (f + 4, limm, 4);
+ dwarf2_emit_insn (8);
+ }
+ else if (limm_reloc_p)
+ /* We need a limm reloc, but the tables think we don't. */
+ abort ();
+ else
+ {
+ f = frag_more (4);
+ md_number_to_chars (f, insn, 4);
+ dwarf2_emit_insn (4);
+ }
- reloc->sym_ptr_ptr = &fixP->fx_addsy->bsym;
- reloc->address = fixP->fx_frag->fr_address + fixP->fx_where;
- reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type);
- if (reloc->howto == (reloc_howto_type *) NULL)
- {
- as_bad_where (fixP->fx_file, fixP->fx_line,
- "internal error: can't export reloc type %d (`%s')",
- fixP->fx_r_type,
- bfd_get_reloc_code_name (fixP->fx_r_type));
- return NULL;
- }
+ /* Create any fixups. */
+ for (i = 0; i < fc; ++i)
+ {
+ int op_type, reloc_type;
+ expressionS exptmp;
+ const struct arc_operand *operand;
- assert (!fixP->fx_pcrel == !reloc->howto->pc_relative);
+ /* Create a fixup for this operand.
+ At this point we do not use a bfd_reloc_code_real_type for
+ operands residing in the insn, but instead just use the
+ operand index. This lets us easily handle fixups for any
+ operand type, although that is admittedly not a very exciting
+ feature. We pick a BFD reloc type in md_apply_fix3.
- /* Set addend to account for PC being advanced one insn before the
- target address is computed, drop fx_addnumber as it is handled
- elsewhere mlm */
+ Limm values (4 byte immediate "constants") must be treated
+ normally because they're not part of the actual insn word
+ and thus the insertion routines don't handle them. */
- reloc->addend = (fixP->fx_pcrel ? -4 : 0);
+ if (arc_operands[fixups[i].opindex].flags & ARC_OPERAND_LIMM)
+ {
+ /* Modify the fixup addend as required by the cpu. */
+ fixups[i].exp.X_add_number += arc_limm_fixup_adjust (insn);
+ op_type = fixups[i].opindex;
+ /* FIXME: can we add this data to the operand table? */
+ if (op_type == arc_operand_map['L']
+ || op_type == arc_operand_map['s']
+ || op_type == arc_operand_map['o']
+ || op_type == arc_operand_map['O'])
+ reloc_type = BFD_RELOC_32;
+ else if (op_type == arc_operand_map['J'])
+ reloc_type = BFD_RELOC_ARC_B26;
+ else
+ abort ();
+ reloc_type = get_arc_exp_reloc_type (1, reloc_type,
+ &fixups[i].exp,
+ &exptmp);
+ }
+ else
+ {
+ op_type = get_arc_exp_reloc_type (0, fixups[i].opindex,
+ &fixups[i].exp, &exptmp);
+ reloc_type = op_type + (int) BFD_RELOC_UNUSED;
+ }
+ operand = &arc_operands[op_type];
+ fix_new_exp (frag_now,
+ ((f - frag_now->fr_literal)
+ + (operand->flags & ARC_OPERAND_LIMM ? 4 : 0)), 4,
+ &exptmp,
+ (operand->flags & ARC_OPERAND_RELATIVE_BRANCH) != 0,
+ (bfd_reloc_code_real_type) reloc_type);
+ }
+ return;
+ }
+ }
- return reloc;
+ if (NULL == last_errmsg)
+ as_bad ("bad instruction `%s'", start);
+ else
+ as_bad (last_errmsg);
}
projects / deliverable / binutils-gdb.git / blobdiff