the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
-
-/*!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- This file is work in progress and was copied from m32r/tc-m32r.c in
- order to all gas/configure to run with the target fr30-unknown-elf.
- Other than changing all occurances for m32r to fr30, this file has not
- been customized for fr30 in any way.
- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
-
#include <stdio.h>
#include <ctype.h>
#include "as.h"
#include "cgen-opc.h"
#include "cgen.h"
-/* Linked list of symbols that are debugging symbols to be defined as the
- beginning of the current instruction. */
+/* Linked list of symbols that are debugging symbols to be
+ defined as the beginning of the current instruction. */
typedef struct sym_link
{
struct sym_link * next;
}
fr30_insn;
-/* prev_insn.insn is non-null if last insn was a 16 bit insn on a 32 bit
- boundary (i.e. was the first of two 16 bit insns). */
-static fr30_insn prev_insn;
-
-/* Non-zero if we've seen a relaxable insn since the last 32 bit
- alignment request. */
-static int seen_relaxable_p = 0;
-
-/* Non-zero if -relax specified, in which case sufficient relocs are output
- for the linker to do relaxing.
- We do simple forms of relaxing internally, but they are always done.
- This flag does not apply to them. */
-static int fr30_relax;
-
-#if 0 /* not supported yet */
-/* If non-NULL, pointer to cpu description file to read.
- This allows runtime additions to the assembler. */
-static const char * fr30_cpu_desc;
-#endif
-
-/* Non-zero if warn when a high/shigh reloc has no matching low reloc.
- Each high/shigh reloc must be paired with it's low cousin in order to
- properly calculate the addend in a relocatable link (since there is a
- potential carry from the low to the high/shigh).
- This option is off by default though for user-written assembler code it
- might make sense to make the default be on (i.e. have gcc pass a flag
- to turn it off). This warning must not be on for GCC created code as
- optimization may delete the low but not the high/shigh (at least we
- shouldn't assume or require it to). */
-static int warn_unmatched_high = 0;
-
-/* stuff for .scomm symbols. */
-static segT sbss_section;
-static asection scom_section;
-static asymbol scom_symbol;
-
const char comment_chars[] = ";";
const char line_comment_chars[] = "#";
const char line_separator_chars[] = "";
const char EXP_CHARS[] = "eE";
const char FLT_CHARS[] = "dD";
-
-/* Relocations against symbols are done in two
- parts, with a HI relocation and a LO relocation. Each relocation
- has only 16 bits of space to store an addend. This means that in
- order for the linker to handle carries correctly, it must be able
- to locate both the HI and the LO relocation. This means that the
- relocations must appear in order in the relocation table.
-
- In order to implement this, we keep track of each unmatched HI
- relocation. We then sort them so that they immediately precede the
- corresponding LO relocation. */
-
-struct fr30_hi_fixup
-{
- struct fr30_hi_fixup * next; /* Next HI fixup. */
- fixS * fixp; /* This fixup. */
- segT seg; /* The section this fixup is in. */
-
-};
-
-/* The list of unmatched HI relocs. */
-
-static struct fr30_hi_fixup * fr30_hi_fixup_list;
-
\f
#define FR30_SHORTOPTS ""
const char * md_shortopts = FR30_SHORTOPTS;
struct option md_longopts[] =
{
- /* Sigh. I guess all warnings must now have both variants. */
-#define OPTION_WARN_UNMATCHED (OPTION_MD_BASE + 4)
- {"warn-unmatched-high", OPTION_WARN_UNMATCHED},
- {"Wuh", OPTION_WARN_UNMATCHED},
-#define OPTION_NO_WARN_UNMATCHED (OPTION_MD_BASE + 5)
- {"no-warn-unmatched-high", OPTION_WARN_UNMATCHED},
- {"Wnuh", OPTION_WARN_UNMATCHED},
-
-#if 0 /* not supported yet */
-#define OPTION_RELAX (OPTION_MD_BASE + 6)
- {"relax", no_argument, NULL, OPTION_RELAX},
-#define OPTION_CPU_DESC (OPTION_MD_BASE + 7)
- {"cpu-desc", required_argument, NULL, OPTION_CPU_DESC},
-#endif
-
{NULL, no_argument, NULL, 0}
};
size_t md_longopts_size = sizeof (md_longopts);
{
switch (c)
{
- case OPTION_WARN_UNMATCHED:
- warn_unmatched_high = 1;
- break;
-
- case OPTION_NO_WARN_UNMATCHED:
- warn_unmatched_high = 0;
- break;
-
-#if 0 /* not supported yet */
- case OPTION_RELAX:
- fr30_relax = 1;
- break;
- case OPTION_CPU_DESC:
- fr30_cpu_desc = arg;
- break;
-#endif
-
default:
return 0;
}
FILE * stream;
{
fprintf (stream, _(" FR30 specific command line options:\n"));
-
- fprintf (stream, _("\
- -warn-unmatched-high warn when an (s)high reloc has no matching low reloc\n"));
- fprintf (stream, _("\
- -no-warn-unmatched-high do not warn about missing low relocs\n"));
- fprintf (stream, _("\
- -Wuh synonym for -warn-unmatched-high\n"));
- fprintf (stream, _("\
- -Wnuh synonym for -no-warn-unmatched-high\n"));
-
-#if 0
- fprintf (stream, _("\
- -relax create linker relaxable code\n"));
- fprintf (stream, _("\
- -cpu-desc provide runtime cpu description file\n"));
-#endif
}
-static void fill_insn PARAMS ((int));
-static void fr30_scomm PARAMS ((int));
-static void debug_sym PARAMS ((int));
-static void expand_debug_syms PARAMS ((sym_linkS *, int));
-
-/* Set by md_assemble for use by fr30_fill_insn. */
-static subsegT prev_subseg;
-static segT prev_seg;
-
/* The target specific pseudo-ops which we support. */
const pseudo_typeS md_pseudo_table[] =
{
{ "word", cons, 4 },
- { "fillinsn", fill_insn, 0 },
- { "scomm", fr30_scomm, 0 },
- { "debugsym", debug_sym, 0 },
- { NULL, NULL, 0 }
+ { NULL, NULL, 0 }
};
-/* FIXME: Should be machine generated. */
-#define NOP_INSN 0x7000
-#define PAR_NOP_INSN 0xf000 /* can only be used in 2nd slot */
-
-/* When we align the .text section, insert the correct NOP pattern.
- N is the power of 2 alignment. LEN is the length of pattern FILL.
- MAX is the maximum number of characters to skip when doing the alignment,
- or 0 if there is no maximum. */
-
-int
-fr30_do_align (n, fill, len, max)
- int n;
- const char * fill;
- int len;
- int max;
-{
- /* Only do this if the fill pattern wasn't specified. */
- if (fill == NULL
- && (now_seg->flags & SEC_CODE) != 0
- /* Only do this special handling if aligning to at least a
- 4 byte boundary. */
- && n > 1
- /* Only do this special handling if we're allowed to emit at
- least two bytes. */
- && (max == 0 || max > 1))
- {
- static const unsigned char nop_pattern[] = { 0xf0, 0x00 };
-
-#if 0
- /* First align to a 2 byte boundary, in case there is an odd .byte. */
- /* FIXME: How much memory will cause gas to use when assembling a big
- program? Perhaps we can avoid the frag_align call? */
- frag_align (1, 0, 0);
-#endif
- /* Next align to a 4 byte boundary (we know n >= 2) using a parallel
- nop. */
- frag_align_pattern (2, nop_pattern, sizeof nop_pattern, 0);
- /* If doing larger alignments use a repeating sequence of appropriate
- nops. */
- if (n > 2)
- {
- static const unsigned char multi_nop_pattern[] =
- { 0x70, 0x00, 0xf0, 0x00 };
- frag_align_pattern (n, multi_nop_pattern, sizeof multi_nop_pattern,
- max ? max - 2 : 0);
- }
-
- prev_insn.insn = NULL;
- return 1;
- }
-
- return 0;
-}
-
-/* If the last instruction was the first of 2 16 bit insns,
- output a nop to move the PC to a 32 bit boundary.
-
- This is done via an alignment specification since branch relaxing
- may make it unnecessary.
-
- Internally, we need to output one of these each time a 32 bit insn is
- seen after an insn that is relaxable. */
-
-static void
-fill_insn (ignore)
- int ignore;
-{
- (void) fr30_do_align (2, NULL, 0, 0);
- prev_insn.insn = NULL;
- seen_relaxable_p = 0;
-}
-
-/* Record the symbol so that when we output the insn, we can create
- a symbol that is at the start of the instruction. This is used
- to emit the label for the start of a breakpoint without causing
- the assembler to emit a NOP if the previous instruction was a
- 16 bit instruction. */
-
-static void
-debug_sym (ignore)
- int ignore;
-{
- register char *name;
- register char delim;
- register char *end_name;
- register symbolS *symbolP;
- register sym_linkS *link;
-
- name = input_line_pointer;
- delim = get_symbol_end ();
- end_name = input_line_pointer;
-
- if ((symbolP = symbol_find (name)) == NULL
- && (symbolP = md_undefined_symbol (name)) == NULL)
- {
- symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
- }
-
- symbol_table_insert (symbolP);
- if (S_IS_DEFINED (symbolP) && S_GET_SEGMENT (symbolP) != reg_section)
- /* xgettext:c-format */
- as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP));
-
- else
- {
- link = (sym_linkS *) xmalloc (sizeof (sym_linkS));
- link->symbol = symbolP;
- link->next = debug_sym_link;
- debug_sym_link = link;
- symbolP->local = 1;
- }
-
- *end_name = delim;
- demand_empty_rest_of_line ();
-}
-
-/* Second pass to expanding the debug symbols, go through linked
- list of symbols and reassign the address. */
-
-static void
-expand_debug_syms (syms, align)
- sym_linkS *syms;
- int align;
-{
- char *save_input_line = input_line_pointer;
- sym_linkS *next_syms;
-
- if (!syms)
- return;
-
- (void) fr30_do_align (align, NULL, 0, 0);
- for (; syms != (sym_linkS *)0; syms = next_syms)
- {
- symbolS *symbolP = syms->symbol;
- next_syms = syms->next;
- input_line_pointer = ".\n";
- pseudo_set (symbolP);
- free ((char *)syms);
- }
-
- input_line_pointer = save_input_line;
-}
-
-/* Cover function to fill_insn called after a label and at end of assembly.
- The result is always 1: we're called in a conditional to see if the
- current line is a label. */
-
-int
-fr30_fill_insn (done)
- int done;
-{
- if (prev_seg != NULL)
- {
- segT seg = now_seg;
- subsegT subseg = now_subseg;
-
- subseg_set (prev_seg, prev_subseg);
-
- fill_insn (0);
-
- subseg_set (seg, subseg);
- }
-
- if (done && debug_sym_link)
- {
- expand_debug_syms (debug_sym_link, 1);
- debug_sym_link = (sym_linkS *)0;
- }
-
- return 1;
-}
\f
void
md_begin ()
/* Initialize the `cgen' interface. */
/* Set the machine number and endian. */
- gas_cgen_opcode_desc = fr30_cgen_opcode_open (0 /* mach number */,
- target_big_endian ?
- CGEN_ENDIAN_BIG
- : CGEN_ENDIAN_LITTLE);
+ gas_cgen_opcode_desc = fr30_cgen_opcode_open (bfd_mach_fr30, CGEN_ENDIAN_BIG);
fr30_cgen_init_asm (gas_cgen_opcode_desc);
/* This is a callback from cgen to gas to parse operands. */
cgen_set_parse_operand_fn (gas_cgen_opcode_desc, gas_cgen_parse_operand);
-
-#if 0 /* not supported yet */
- /* If a runtime cpu description file was provided, parse it. */
- if (fr30_cpu_desc != NULL)
- {
- const char * errmsg;
-
- errmsg = cgen_read_cpu_file (gas_cgen_opcode_desc, fr30_cpu_desc);
- if (errmsg != NULL)
- as_bad ("%s: %s", fr30_cpu_desc, errmsg);
- }
-#endif
-
- /* Save the current subseg so we can restore it [it's the default one and
- we don't want the initial section to be .sbss]. */
- seg = now_seg;
- subseg = now_subseg;
-
- /* The sbss section is for local .scomm symbols. */
- sbss_section = subseg_new (".sbss", 0);
-
- /* This is copied from perform_an_assembly_pass. */
- applicable = bfd_applicable_section_flags (stdoutput);
- bfd_set_section_flags (stdoutput, sbss_section, applicable & SEC_ALLOC);
-
-#if 0 /* What does this do? [see perform_an_assembly_pass] */
- seg_info (bss_section)->bss = 1;
-#endif
-
- subseg_set (seg, subseg);
-
- /* We must construct a fake section similar to bfd_com_section
- but with the name .scommon. */
- scom_section = bfd_com_section;
- scom_section.name = ".scommon";
- scom_section.output_section = & scom_section;
- scom_section.symbol = & scom_symbol;
- scom_section.symbol_ptr_ptr = & scom_section.symbol;
- scom_symbol = * bfd_com_section.symbol;
- scom_symbol.name = ".scommon";
- scom_symbol.section = & scom_section;
}
void
md_assemble (str)
char * str;
{
-#if 0
fr30_insn insn;
char * errmsg;
char * str2 = NULL;
return;
}
- if (CGEN_INSN_BITSIZE (insn.insn) == 32)
- {
- /* 32 bit insns must live on 32 bit boundaries. */
- if (prev_insn.insn || seen_relaxable_p)
- {
- /* ??? If calling fill_insn too many times turns us into a memory
- pig, can we call a fn to assemble a nop instead of
- !seen_relaxable_p? */
- fill_insn (0);
- }
-
- expand_debug_syms (insn.debug_sym_link, 2);
-
- /* Doesn't really matter what we pass for RELAX_P here. */
- gas_cgen_finish_insn (insn.insn, insn.buffer,
- CGEN_FIELDS_BITSIZE (& insn.fields), 1, NULL);
- }
- else
- {
- int on_32bit_boundary_p;
-
- if (CGEN_INSN_BITSIZE (insn.insn) != 16)
- abort();
-
- insn.orig_insn = insn.insn;
-
- /* Compute whether we're on a 32 bit boundary or not.
- prev_insn.insn is NULL when we're on a 32 bit boundary. */
- on_32bit_boundary_p = prev_insn.insn == NULL;
-
- expand_debug_syms (insn.debug_sym_link, 1);
-
- {
- int i;
- finished_insnS fi;
-
- /* Ensure each pair of 16 bit insns is in the same frag. */
- frag_grow (4);
-
- gas_cgen_finish_insn (insn.orig_insn, insn.buffer,
- CGEN_FIELDS_BITSIZE (& insn.fields),
- 1 /*relax_p*/, &fi);
- insn.addr = fi.addr;
- insn.frag = fi.frag;
- insn.num_fixups = fi.num_fixups;
- for (i = 0; i < fi.num_fixups; ++i)
- insn.fixups[i] = fi.fixups[i];
- }
-
- /* Keep track of whether we've seen a pair of 16 bit insns.
- prev_insn.insn is NULL when we're on a 32 bit boundary. */
- if (on_32bit_boundary_p)
- prev_insn = insn;
- else
- prev_insn.insn = NULL;
-
- /* If the insn needs the following one to be on a 32 bit boundary
- (e.g. subroutine calls), fill this insn's slot. */
- if (on_32bit_boundary_p
- && CGEN_INSN_ATTR (insn.orig_insn, CGEN_INSN_FILL_SLOT) != 0)
- fill_insn (0);
-
- /* If this is a relaxable insn (can be replaced with a larger version)
- mark the fact so that we can emit an alignment directive for a
- following 32 bit insn if we see one. */
- if (CGEN_INSN_ATTR (insn.orig_insn, CGEN_INSN_RELAXABLE) != 0)
- seen_relaxable_p = 1;
- }
-
- /* Set these so fr30_fill_insn can use them. */
- prev_seg = now_seg;
- prev_subseg = now_subseg;
-#endif
+ /* Doesn't really matter what we pass for RELAX_P here. */
+ gas_cgen_finish_insn (insn.insn, insn.buffer,
+ CGEN_FIELDS_BITSIZE (& insn.fields), 1, NULL);
}
/* The syntax in the manual says constants begin with '#'.
return 0;
}
\f
-/* .scomm pseudo-op handler.
-
- This is a new pseudo-op to handle putting objects in .scommon.
- By doing this the linker won't need to do any work and more importantly
- it removes the implicit -G arg necessary to correctly link the object file.
-*/
-
-static void
-fr30_scomm (ignore)
- int ignore;
-{
- register char * name;
- register char c;
- register char * p;
- offsetT size;
- register symbolS * symbolP;
- offsetT align;
- int align2;
-
- name = input_line_pointer;
- c = get_symbol_end ();
-
- /* just after name is now '\0' */
- p = input_line_pointer;
- * p = c;
- SKIP_WHITESPACE ();
- if (* input_line_pointer != ',')
- {
- as_bad (_("Expected comma after symbol-name: rest of line ignored."));
- ignore_rest_of_line ();
- return;
- }
-
- input_line_pointer ++; /* skip ',' */
- if ((size = get_absolute_expression ()) < 0)
- {
- /* xgettext:c-format */
- as_warn (_(".SCOMMon length (%ld.) <0! Ignored."), (long) size);
- ignore_rest_of_line ();
- return;
- }
-
- /* The third argument to .scomm is the alignment. */
- if (* input_line_pointer != ',')
- align = 8;
- else
- {
- ++ input_line_pointer;
- align = get_absolute_expression ();
- if (align <= 0)
- {
- as_warn (_("ignoring bad alignment"));
- align = 8;
- }
- }
- /* Convert to a power of 2 alignment. */
- if (align)
- {
- for (align2 = 0; (align & 1) == 0; align >>= 1, ++ align2)
- continue;
- if (align != 1)
- {
- as_bad (_("Common alignment not a power of 2"));
- ignore_rest_of_line ();
- return;
- }
- }
- else
- align2 = 0;
-
- * p = 0;
- symbolP = symbol_find_or_make (name);
- * p = c;
-
- if (S_IS_DEFINED (symbolP))
- {
- /* xgettext:c-format */
- as_bad (_("Ignoring attempt to re-define symbol `%s'."),
- S_GET_NAME (symbolP));
- ignore_rest_of_line ();
- return;
- }
-
- if (S_GET_VALUE (symbolP) && S_GET_VALUE (symbolP) != (valueT) size)
- {
- /* xgettext:c-format */
- as_bad (_("Length of .scomm \"%s\" is already %ld. Not changed to %ld."),
- S_GET_NAME (symbolP),
- (long) S_GET_VALUE (symbolP),
- (long) size);
-
- ignore_rest_of_line ();
- return;
- }
-
- if (symbolP->local)
- {
- segT old_sec = now_seg;
- int old_subsec = now_subseg;
- char * pfrag;
-
- record_alignment (sbss_section, align2);
- subseg_set (sbss_section, 0);
-
- if (align2)
- frag_align (align2, 0, 0);
-
- if (S_GET_SEGMENT (symbolP) == sbss_section)
- symbolP->sy_frag->fr_symbol = 0;
-
- symbolP->sy_frag = frag_now;
-
- pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP, size,
- (char *) 0);
- * pfrag = 0;
- S_SET_SIZE (symbolP, size);
- S_SET_SEGMENT (symbolP, sbss_section);
- S_CLEAR_EXTERNAL (symbolP);
- subseg_set (old_sec, old_subsec);
- }
- else
- {
- S_SET_VALUE (symbolP, (valueT) size);
- S_SET_ALIGN (symbolP, align2);
- S_SET_EXTERNAL (symbolP);
- S_SET_SEGMENT (symbolP, & scom_section);
- }
-
- demand_empty_rest_of_line ();
-}
-\f
/* Interface to relax_segment. */
/* FIXME: Build table by hand, get it working, then machine generate. */
const CGEN_OPERAND * operand;
fixS * fixP;
{
-#if 0
switch (CGEN_OPERAND_TYPE (operand))
{
- case FR30_OPERAND_DISP8 : return BFD_RELOC_FR30_10_PCREL;
- case FR30_OPERAND_DISP16 : return BFD_RELOC_FR30_18_PCREL;
- case FR30_OPERAND_DISP24 : return BFD_RELOC_FR30_26_PCREL;
- case FR30_OPERAND_UIMM24 : return BFD_RELOC_FR30_24;
- case FR30_OPERAND_HI16 :
- case FR30_OPERAND_SLO16 :
- case FR30_OPERAND_ULO16 :
- /* If low/high/shigh/sda was used, it is recorded in `opinfo'. */
- if (fixP->tc_fix_data.opinfo != 0)
- return fixP->tc_fix_data.opinfo;
- break;
+ case FR30_OPERAND_PC : return BFD_RELOC_FR30_12_PCREL;
+ case FR30_OPERAND_RI :
+ case FR30_OPERAND_RJ :
+ case FR30_OPERAND_NBIT :
+ case FR30_OPERAND_VBIT :
+ case FR30_OPERAND_ZBIT :
+ case FR30_OPERAND_CBIT :
default : /* avoid -Wall warning */
break;
}
-#endif
+
return BFD_RELOC_NONE;
}
|| fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
return 1;
- if (! fr30_relax)
- return 0;
-
- return (fix->fx_pcrel
- || 0 /* ??? */);
+ return fix->fx_pcrel;
}
\f
/* Write a value out to the object file, using the appropriate endianness. */
valueT val;
int n;
{
- if (target_big_endian)
- number_to_chars_bigendian (buf, val, n);
- else
- number_to_chars_littleendian (buf, val, n);
+ number_to_chars_bigendian (buf, val, n);
}
/* Turn a string in input_line_pointer into a floating point constant of type
char *
md_atof (type, litP, sizeP)
- char type;
- char *litP;
- int *sizeP;
+ char type;
+ char * litP;
+ int * sizeP;
{
int i;
int prec;
input_line_pointer = t;
* sizeP = prec * sizeof (LITTLENUM_TYPE);
- if (target_big_endian)
- {
- for (i = 0; i < prec; i++)
- {
- md_number_to_chars (litP, (valueT) words[i],
- sizeof (LITTLENUM_TYPE));
- litP += sizeof (LITTLENUM_TYPE);
- }
- }
- else
+ for (i = 0; i < prec; i++)
{
- for (i = prec - 1; i >= 0; i--)
- {
- md_number_to_chars (litP, (valueT) words[i],
- sizeof (LITTLENUM_TYPE));
- litP += sizeof (LITTLENUM_TYPE);
- }
+ md_number_to_chars (litP, (valueT) words[i],
+ sizeof (LITTLENUM_TYPE));
+ litP += sizeof (LITTLENUM_TYPE);
}
return 0;
projects / binutils-gdb.git / commitdiff