From b67f7834e279b0bafe95fa8ef70e754940ca575f Mon Sep 17 00:00:00 2001 From: Nick Clifton Date: Wed, 11 Nov 1998 17:59:42 +0000 Subject: [PATCH] Removed superflous code. --- gas/ChangeLog | 4 + gas/config/tc-fr30.c | 617 ++------------------------------------------------- 2 files changed, 28 insertions(+), 593 deletions(-) diff --git a/gas/ChangeLog b/gas/ChangeLog index dc9f420..48c745b 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,7 @@ +Wed Nov 11 09:58:21 1998 Nick Clifton + + * config/tc-fr30.c: Removed currently superflous code. + Tue Nov 10 13:13:05 1998 Nick Clifton * config/tc-fr30.h: New file. diff --git a/gas/config/tc-fr30.c b/gas/config/tc-fr30.c index 4887219..accb389 100644 --- a/gas/config/tc-fr30.c +++ b/gas/config/tc-fr30.c @@ -18,14 +18,6 @@ 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 #include #include "as.h" @@ -34,8 +26,8 @@ #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; @@ -67,92 +59,17 @@ typedef struct } 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; - #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); @@ -164,23 +81,6 @@ md_parse_option (c, arg) { 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; } @@ -192,214 +92,15 @@ md_show_usage (stream) 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; -} void md_begin () @@ -411,62 +112,17 @@ 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; @@ -486,79 +142,9 @@ md_assemble (str) 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 '#'. @@ -591,137 +177,6 @@ md_undefined_symbol (name) return 0; } -/* .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 (); -} - /* Interface to relax_segment. */ /* FIXME: Build table by hand, get it working, then machine generate. */ @@ -996,24 +451,19 @@ md_cgen_lookup_reloc (insn, operand, fixP) 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; } @@ -1035,11 +485,7 @@ fr30_force_relocation (fix) || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY) return 1; - if (! fr30_relax) - return 0; - - return (fix->fx_pcrel - || 0 /* ??? */); + return fix->fx_pcrel; } /* Write a value out to the object file, using the appropriate endianness. */ @@ -1050,10 +496,7 @@ md_number_to_chars (buf, val, n) 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 @@ -1066,9 +509,9 @@ md_number_to_chars (buf, val, n) char * md_atof (type, litP, sizeP) - char type; - char *litP; - int *sizeP; + char type; + char * litP; + int * sizeP; { int i; int prec; @@ -1104,23 +547,11 @@ md_atof (type, litP, sizeP) 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; -- 2.7.4