/* GAS interface for targets using CGEN: Cpu tools GENerator.
- Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+ Copyright 1996, 1997, 1998, 1999, 2000, 2001
+ Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
#include "cgen.h"
#include "dwarf2dbg.h"
+static void queue_fixup PARAMS ((int, int, expressionS *));
+
/* Opcode table descriptor, must be set by md_begin. */
CGEN_CPU_DESC gas_cgen_cpu_desc;
++ num_fixups;
}
-/* The following three functions allow a backup of the fixup chain to be made,
- and to have this backup be swapped with the current chain. This allows
- certain ports, eg the m32r, to swap two instructions and swap their fixups
- at the same time. */
-/* ??? I think with cgen_asm_finish_insn (or something else) there is no
- more need for this. */
+/* The following functions allow fixup chains to be stored, retrieved,
+ and swapped. They are a generalization of a pre-existing scheme
+ for storing, restoring and swapping fixup chains that was used by
+ the m32r port. The functionality is essentially the same, only
+ instead of only being able to store a single fixup chain, an entire
+ array of fixup chains can be stored. It is the user's responsibility
+ to keep track of how many fixup chains have been stored and which
+ elements of the array they are in.
+
+ The algorithms used are the same as in the old scheme. Other than the
+ "array-ness" of the whole thing, the functionality is identical to the
+ old scheme.
+
+ gas_cgen_initialize_saved_fixups_array():
+ Sets num_fixups_in_chain to 0 for each element. Call this from
+ md_begin() if you plan to use these functions and you want the
+ fixup count in each element to be set to 0 intially. This is
+ not necessary, but it's included just in case. It performs
+ the same function for each element in the array of fixup chains
+ that gas_init_parse() performs for the current fixups.
+
+ gas_cgen_save_fixups (element):
+ element - element number of the array you wish to store the fixups
+ to. No mechanism is built in for tracking what element
+ was last stored to.
+
+ gas_cgen_restore_fixups (element):
+ element - element number of the array you wish to restore the fixups
+ from.
+
+ gas_cgen_swap_fixups(int element):
+ element - swap the current fixups with those in this element number.
+*/
+
+struct saved_fixups {
+ struct fixup fixup_chain[GAS_CGEN_MAX_FIXUPS];
+ int num_fixups_in_chain;
+};
-static struct fixup saved_fixups[GAS_CGEN_MAX_FIXUPS];
-static int saved_num_fixups;
+static struct saved_fixups stored_fixups[MAX_SAVED_FIXUP_CHAINS];
void
-gas_cgen_save_fixups ()
+gas_cgen_initialize_saved_fixups_array ()
{
- saved_num_fixups = num_fixups;
-
- memcpy (saved_fixups, fixups, sizeof (fixups[0]) * num_fixups);
+ int i = 0;
- num_fixups = 0;
+ while (i < MAX_SAVED_FIXUP_CHAINS)
+ stored_fixups[i++].num_fixups_in_chain = 0;
}
void
-gas_cgen_restore_fixups ()
+gas_cgen_save_fixups (i)
+ int i;
{
- num_fixups = saved_num_fixups;
-
- memcpy (fixups, saved_fixups, sizeof (fixups[0]) * num_fixups);
+ if (i < 0 || i >= MAX_SAVED_FIXUP_CHAINS)
+ {
+ as_fatal ("index into stored_fixups[] out of bounds");
+ return;
+ }
- saved_num_fixups = 0;
+ stored_fixups[i].num_fixups_in_chain = num_fixups;
+ memcpy (stored_fixups[i].fixup_chain, fixups,
+ sizeof (fixups[0]) * num_fixups);
+ num_fixups = 0;
}
void
-gas_cgen_swap_fixups ()
+gas_cgen_restore_fixups (i)
+ int i;
{
- int tmp;
- struct fixup tmp_fixup;
-
- if (num_fixups == 0)
+ if (i < 0 || i >= MAX_SAVED_FIXUP_CHAINS)
{
- gas_cgen_restore_fixups ();
+ as_fatal ("index into stored_fixups[] out of bounds");
+ return;
}
- else if (saved_num_fixups == 0)
+
+ num_fixups = stored_fixups[i].num_fixups_in_chain;
+ memcpy (fixups,stored_fixups[i].fixup_chain,
+ (sizeof (stored_fixups[i].fixup_chain[0])) * num_fixups);
+ stored_fixups[i].num_fixups_in_chain = 0;
+}
+
+void
+gas_cgen_swap_fixups (i)
+ int i;
+{
+ if (i < 0 || i >= MAX_SAVED_FIXUP_CHAINS)
{
- gas_cgen_save_fixups ();
+ as_fatal ("index into stored_fixups[] out of bounds");
+ return;
}
+
+ if (num_fixups == 0)
+ gas_cgen_restore_fixups (i);
+
+ else if (stored_fixups[i].num_fixups_in_chain == 0)
+ gas_cgen_save_fixups (i);
+
else
{
- tmp = saved_num_fixups;
- saved_num_fixups = num_fixups;
+ int tmp;
+ struct fixup tmp_fixup;
+
+ tmp = stored_fixups[i].num_fixups_in_chain;
+ stored_fixups[i].num_fixups_in_chain = num_fixups;
num_fixups = tmp;
for (tmp = GAS_CGEN_MAX_FIXUPS; tmp--;)
{
- tmp_fixup = saved_fixups [tmp];
- saved_fixups [tmp] = fixups [tmp];
- fixups [tmp] = tmp_fixup;
+ tmp_fixup = stored_fixups[i].fixup_chain [tmp];
+ stored_fixups[i].fixup_chain[tmp] = fixups [tmp];
+ fixups [tmp] = tmp_fixup;
}
}
}
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. We pick a BFD reloc type in md_apply_fix. */
+ operand type. We pick a BFD reloc type in md_apply_fix3. */
fixS *
gas_cgen_record_fixup (frag, where, insn, length, operand, opinfo, symbol, offset)
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. We pick a BFD reloc type in md_apply_fix. */
+ operand type. We pick a BFD reloc type in md_apply_fix3. */
fixS *
gas_cgen_record_fixup_exp (frag, where, insn, length, operand, opinfo, exp)
static char *hold;
static enum cgen_parse_operand_result *resultP_1;
#endif
- const char *errmsg = NULL;
+ const char *errmsg;
expressionS exp;
if (want == CGEN_PARSE_OPERAND_INIT)
expr_jmp_buf_p = 0;
input_line_pointer = (char *) hold;
*resultP_1 = CGEN_PARSE_OPERAND_RESULT_ERROR;
- return "illegal operand";
+ return _("illegal operand");
}
expr_jmp_buf_p = 1;
expression (&exp);
expr_jmp_buf_p = 0;
+ errmsg = NULL;
*strP = input_line_pointer;
input_line_pointer = hold;
{
int max_len;
fragS *old_frag;
+ expressionS *exp;
+ symbolS *sym;
+ offsetT off;
#ifdef TC_CGEN_MAX_RELAX
max_len = TC_CGEN_MAX_RELAX (insn, byte_len);
/* Create a relaxable fragment for this instruction. */
old_frag = frag_now;
+ exp = &fixups[relax_operand].exp;
+ sym = exp->X_add_symbol;
+ off = exp->X_add_number;
+ if (exp->X_op != O_constant && exp->X_op != O_symbol)
+ {
+ /* Handle complex expressions. */
+ sym = make_expr_symbol (exp);
+ off = 0;
+ }
+
frag_var (rs_machine_dependent,
max_len - byte_len /* max chars */,
0 /* variable part already allocated */,
/* FIXME: When we machine generate the relax table,
machine generate a macro to compute subtype. */
1 /* subtype */,
- fixups[relax_operand].exp.X_add_symbol,
- fixups[relax_operand].exp.X_add_number,
+ sym,
+ off,
f);
/* Record the operand number with the fragment so md_convert_frag
handles the rest. bfd_install_relocation (or some other bfd function)
should handle them all. */
-int
-gas_cgen_md_apply_fix3 (fixP, valueP, seg)
+void
+gas_cgen_md_apply_fix3 (fixP, valP, seg)
fixS * fixP;
- valueT * valueP;
+ valueT * valP;
segT seg ATTRIBUTE_UNUSED;
{
char *where = fixP->fx_frag->fr_literal + fixP->fx_where;
- valueT value;
+ valueT value = * valP;
/* Canonical name, since used a lot. */
CGEN_CPU_DESC cd = gas_cgen_cpu_desc;
result of md_pcrel_from. This is confusing. */
if (fixP->fx_addsy == (symbolS *) NULL)
- {
- value = *valueP;
- fixP->fx_done = 1;
- }
+ fixP->fx_done = 1;
+
else if (fixP->fx_pcrel)
- value = *valueP;
+ ;
+
else
{
value = fixP->fx_offset;
+
if (fixP->fx_subsy != (symbolS *) NULL)
{
if (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section)
}
if (fixP->fx_done)
- return 1;
+ return;
/* The operand isn't fully resolved. Determine a BFD reloc value
based on the operand information and leave it to
partial_inplace == false. */
reloc_type = md_cgen_lookup_reloc (insn, operand, fixP);
+
if (reloc_type != BFD_RELOC_NONE)
- {
- fixP->fx_r_type = reloc_type;
- }
+ fixP->fx_r_type = reloc_type;
else
{
as_bad_where (fixP->fx_file, fixP->fx_line,
_("unresolved expression that must be resolved"));
fixP->fx_done = 1;
- return 1;
+ return;
}
}
else if (fixP->fx_done)
break;
}
}
- else
- {
- /* bfd_install_relocation will be called to finish things up. */
- }
+ /* else
+ bfd_install_relocation will be called to finish things up. */
/* Tuck `value' away for use by tc_gen_reloc.
See the comment describing fx_addnumber in write.h.
This field is misnamed (or misused :-). */
fixP->fx_addnumber = value;
-
- return 1;
}
/* Translate internal representation of relocation info to BFD target format.
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));
+ _("relocation is not supported"));
return NULL;
}
projects / deliverable / binutils-gdb.git / blobdiff