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Diffstat (limited to 'gas/config/tc-rx.c')
| -rw-r--r-- | gas/config/tc-rx.c | 2394 |
1 files changed, 2394 insertions, 0 deletions
diff --git a/gas/config/tc-rx.c b/gas/config/tc-rx.c new file mode 100644 index 00000000000..f6353210f18 --- /dev/null +++ b/gas/config/tc-rx.c @@ -0,0 +1,2394 @@ +/* tc-rx.c -- Assembler for the Renesas RX + Copyright 2008, 2009 + Free Software Foundation, Inc. + + This file is part of GAS, the GNU Assembler. + + GAS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + GAS is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with GAS; see the file COPYING. If not, write to the Free + Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA + 02110-1301, USA. */ + +#include "as.h" +#include "struc-symbol.h" +#include "obstack.h" +#include "safe-ctype.h" +#include "dwarf2dbg.h" +#include "libbfd.h" +#include "elf/common.h" +#include "elf/rx.h" +#include "rx-defs.h" +#include "filenames.h" +#include "listing.h" +#include "sb.h" +#include "macro.h" + +#define RX_OPCODE_BIG_ENDIAN 0 + +const char comment_chars[] = ";"; +/* Note that input_file.c hand checks for '#' at the beginning of the + first line of the input file. This is because the compiler outputs + #NO_APP at the beginning of its output. */ +const char line_comment_chars[] = "#"; +const char line_separator_chars[] = "!"; + +const char EXP_CHARS[] = "eE"; +const char FLT_CHARS[] = "dD"; + +/* ELF flags to set in the output file header. */ +static int elf_flags = 0; + +bfd_boolean rx_use_conventional_section_names = FALSE; +static bfd_boolean rx_use_small_data_limit = FALSE; + +enum options +{ + OPTION_BIG = OPTION_MD_BASE, + OPTION_LITTLE, + OPTION_32BIT_DOUBLES, + OPTION_64BIT_DOUBLES, + OPTION_CONVENTIONAL_SECTION_NAMES, + OPTION_RENESAS_SECTION_NAMES, + OPTION_SMALL_DATA_LIMIT, + OPTION_RELAX +}; + +#define RX_SHORTOPTS "" +const char * md_shortopts = RX_SHORTOPTS; + +/* Assembler options. */ +struct option md_longopts[] = +{ + {"mbig-endian-data", no_argument, NULL, OPTION_BIG}, + {"mlittle-endian-data", no_argument, NULL, OPTION_LITTLE}, + /* The next two switches are here because the + generic parts of the linker testsuite uses them. */ + {"EB", no_argument, NULL, OPTION_BIG}, + {"EL", no_argument, NULL, OPTION_LITTLE}, + {"m32bit-doubles", no_argument, NULL, OPTION_32BIT_DOUBLES}, + {"m64bit-doubles", no_argument, NULL, OPTION_64BIT_DOUBLES}, + /* This option is here mainly for the binutils testsuites, + as many of their tests assume conventional section naming. */ + {"muse-conventional-section-names", no_argument, NULL, OPTION_CONVENTIONAL_SECTION_NAMES}, + {"muse-renesas-section-names", no_argument, NULL, OPTION_RENESAS_SECTION_NAMES}, + {"msmall-data-limit", no_argument, NULL, OPTION_SMALL_DATA_LIMIT}, + {"relax", no_argument, NULL, OPTION_RELAX}, + {NULL, no_argument, NULL, 0} +}; +size_t md_longopts_size = sizeof (md_longopts); + +int +md_parse_option (int c ATTRIBUTE_UNUSED, char * arg ATTRIBUTE_UNUSED) +{ + switch (c) + { + case OPTION_BIG: + target_big_endian = 1; + return 1; + + case OPTION_LITTLE: + target_big_endian = 0; + return 1; + + case OPTION_32BIT_DOUBLES: + elf_flags &= ~ E_FLAG_RX_64BIT_DOUBLES; + return 1; + + case OPTION_64BIT_DOUBLES: + elf_flags |= E_FLAG_RX_64BIT_DOUBLES; + return 1; + + case OPTION_CONVENTIONAL_SECTION_NAMES: + rx_use_conventional_section_names = TRUE; + return 1; + + case OPTION_RENESAS_SECTION_NAMES: + rx_use_conventional_section_names = FALSE; + return 1; + + case OPTION_SMALL_DATA_LIMIT: + rx_use_small_data_limit = TRUE; + return 1; + + case OPTION_RELAX: + linkrelax = 1; + return 1; + } + return 0; +} + +void +md_show_usage (FILE * stream) +{ + fprintf (stream, _(" RX specific command line options:\n")); + fprintf (stream, _(" --mbig-endian-data\n")); + fprintf (stream, _(" --mlittle-endian-data [default]\n")); + fprintf (stream, _(" --m32bit-doubles [default]\n")); + fprintf (stream, _(" --m64bit-doubles\n")); + fprintf (stream, _(" --muse-conventional-section-names\n")); + fprintf (stream, _(" --muse-renesas-section-names [default]\n")); + fprintf (stream, _(" --msmall-data-limit\n")); +} + +static void +s_bss (int ignore ATTRIBUTE_UNUSED) +{ + int temp; + + temp = get_absolute_expression (); + subseg_set (bss_section, (subsegT) temp); + demand_empty_rest_of_line (); +} + +static void +rx_float_cons (int ignore ATTRIBUTE_UNUSED) +{ + if (elf_flags & E_FLAG_RX_64BIT_DOUBLES) + return float_cons ('d'); + return float_cons ('f'); +} + +static char * +rx_strcasestr (const char *string, const char *sub) +{ + int subl; + int strl; + + if (!sub || !sub[0]) + return (char *)string; + + subl = strlen (sub); + strl = strlen (string); + + while (strl >= subl) + { + /* strncasecmp is in libiberty. */ + if (strncasecmp (string, sub, subl) == 0) + return (char *)string; + + string ++; + strl --; + } + return NULL; +} + +static void +rx_include (int ignore) +{ + FILE * try; + char * path; + char * filename; + char * current_filename; + char * eof; + char * p; + char * d; + char * f; + char end_char; + size_t len; + + /* The RX version of the .INCLUDE pseudo-op does not + have to have the filename inside double quotes. */ + SKIP_WHITESPACE (); + if (*input_line_pointer == '"') + { + /* Treat as the normal GAS .include pseudo-op. */ + s_include (ignore); + return; + } + + /* Get the filename. Spaces are allowed, NUL characters are not. */ + filename = input_line_pointer; + eof = find_end_of_line (filename, FALSE); + input_line_pointer = eof; + + while (eof >= filename && (* eof == ' ' || * eof == '\n')) + -- eof; + end_char = *(++ eof); + * eof = 0; + if (eof == filename) + { + as_bad (_("no filename following .INCLUDE pseudo-op")); + * eof = end_char; + return; + } + + as_where (& current_filename, NULL); + f = (char *) xmalloc (strlen (current_filename) + strlen (filename) + 1); + + /* Check the filename. If [@]..FILE[@] is found then replace + this with the current assembler source filename, stripped + of any directory prefixes or extensions. */ + if ((p = rx_strcasestr (filename, "..file")) != NULL) + { + char * c; + + len = 6; /* strlen ("..file"); */ + + if (p > filename && p[-1] == '@') + -- p, ++len; + + if (p[len] == '@') + len ++; + + for (d = c = current_filename; *c; c++) + if (IS_DIR_SEPARATOR (* c)) + d = c + 1; + for (c = d; *c; c++) + if (*c == '.') + break; + + sprintf (f, "%.*s%.*s%.*s", (int) (p - filename), filename, + (int) (c - d), d, + (int) (strlen (filename) - ((p + len) - filename)), + p + len); + } + else + strcpy (f, filename); + + /* RX .INCLUDE semantics say that 'filename' is located by: + + 1. If filename is absolute, just try that. Otherwise... + + 2. If the current source file includes a directory component + then prepend that to the filename and try. Otherwise... + + 3. Try any directories specified by the -I command line + option(s). + + 4 .Try a directory specifed by the INC100 environment variable. */ + + if (IS_ABSOLUTE_PATH (f)) + try = fopen (path = f, FOPEN_RT); + else + { + char * env = getenv ("INC100"); + + try = NULL; + + len = strlen (current_filename); + if ((size_t) include_dir_maxlen > len) + len = include_dir_maxlen; + if (env && strlen (env) > len) + len = strlen (env); + + path = (char *) xmalloc (strlen (f) + len + 5); + + if (current_filename != NULL) + { + for (d = NULL, p = current_filename; *p; p++) + if (IS_DIR_SEPARATOR (* p)) + d = p; + + if (d != NULL) + { + sprintf (path, "%.*s/%s", (int) (d - current_filename), current_filename, + f); + try = fopen (path, FOPEN_RT); + } + } + + if (try == NULL) + { + int i; + + for (i = 0; i < include_dir_count; i++) + { + sprintf (path, "%s/%s", include_dirs[i], f); + if ((try = fopen (path, FOPEN_RT)) != NULL) + break; + } + } + + if (try == NULL && env != NULL) + { + sprintf (path, "%s/%s", env, f); + try = fopen (path, FOPEN_RT); + } + + free (f); + } + + if (try == NULL) + { + as_bad (_("unable to locate include file: %s"), filename); + free (path); + } + else + { + fclose (try); + register_dependency (path); + input_scrub_insert_file (path); + } + + * eof = end_char; +} + +static void +parse_rx_section (char * name) +{ + asection * sec; + int type; + int attr = SHF_ALLOC | SHF_EXECINSTR; + int align = 2; + char end_char; + + do + { + char * p; + + SKIP_WHITESPACE (); + for (p = input_line_pointer; *p && strchr ("\n\t, =", *p) == NULL; p++) + ; + end_char = *p; + *p = 0; + + if (strcasecmp (input_line_pointer, "ALIGN") == 0) + { + *p = end_char; + + if (end_char == ' ') + while (ISSPACE (*p)) + p++; + + if (*p == '=') + { + ++ p; + while (ISSPACE (*p)) + p++; + switch (*p) + { + case '2': align = 2; break; + case '4': align = 4; break; + case '8': align = 8; break; + default: + as_bad (_("unrecognised alignment value in .SECTION directive: %s"), p); + ignore_rest_of_line (); + return; + } + ++ p; + } + + end_char = *p; + } + else if (strcasecmp (input_line_pointer, "CODE") == 0) + attr = SHF_ALLOC | SHF_EXECINSTR; + else if (strcasecmp (input_line_pointer, "DATA") == 0) + attr = SHF_ALLOC | SHF_WRITE; + else if (strcasecmp (input_line_pointer, "ROMDATA") == 0) + attr = SHF_ALLOC; + else + { + as_bad (_("unknown parameter following .SECTION directive: %s"), + input_line_pointer); + + *p = end_char; + input_line_pointer = p + 1; + ignore_rest_of_line (); + return; + } + + *p = end_char; + input_line_pointer = p + 1; + } + while (end_char != '\n' && end_char != 0); + + if ((sec = bfd_get_section_by_name (stdoutput, name)) == NULL) + { + if (strcmp (name, "B") && strcmp (name, "B_1") && strcmp (name, "B_2")) + type = SHT_NULL; + else + type = SHT_NOBITS; + + obj_elf_change_section (name, type, attr, 0, NULL, FALSE, FALSE); + } + else /* Try not to redefine a section, especially B_1. */ + { + int flags = sec->flags; + + type = elf_section_type (sec); + + attr = ((flags & SEC_READONLY) ? 0 : SHF_WRITE) + | ((flags & SEC_ALLOC) ? SHF_ALLOC : 0) + | ((flags & SEC_CODE) ? SHF_EXECINSTR : 0) + | ((flags & SEC_MERGE) ? SHF_MERGE : 0) + | ((flags & SEC_STRINGS) ? SHF_STRINGS : 0) + | ((flags & SEC_THREAD_LOCAL) ? SHF_TLS : 0); + + obj_elf_change_section (name, type, attr, 0, NULL, FALSE, FALSE); + } + + bfd_set_section_alignment (stdoutput, now_seg, align); +} + +static void +rx_section (int ignore) +{ + char * p; + + /* The as100 assembler supports a different syntax for the .section + pseudo-op. So check for it and handle it here if necessary. */ + SKIP_WHITESPACE (); + + /* Peek past the section name to see if arguments follow. */ + for (p = input_line_pointer; *p; p++) + if (*p == ',' || *p == '\n') + break; + + if (*p == ',') + { + int len = p - input_line_pointer; + + while (ISSPACE (*++p)) + ; + + if (*p != '"' && *p != '#') + { + char * name = (char *) xmalloc (len + 1); + + strncpy (name, input_line_pointer, len); + name[len] = 0; + + input_line_pointer = p; + parse_rx_section (name); + return; + } + } + + obj_elf_section (ignore); +} + +static void +rx_list (int ignore ATTRIBUTE_UNUSED) +{ + SKIP_WHITESPACE (); + + if (strncasecmp (input_line_pointer, "OFF", 3)) + listing_list (0); + else if (strncasecmp (input_line_pointer, "ON", 2)) + listing_list (1); + else + as_warn (_("expecting either ON or OFF after .list")); +} + +/* Like the .rept pseudo op, but supports the + use of ..MACREP inside the repeated region. */ + +static void +rx_rept (int ignore ATTRIBUTE_UNUSED) +{ + int count = get_absolute_expression (); + + do_repeat_with_expander (count, "MREPEAT", "ENDR", "..MACREP"); +} + +/* Like cons() accept that strings are allowed. */ + +static void +rx_cons (int size) +{ + SKIP_WHITESPACE (); + + if (* input_line_pointer == '"') + stringer (8+0); + else + cons (size); +} + +static void +rx_nop (int ignore ATTRIBUTE_UNUSED) +{ + ignore_rest_of_line (); +} + +static void +rx_unimp (int idx) +{ + as_warn (_("The \".%s\" pseudo-op is not implemented\n"), + md_pseudo_table[idx].poc_name); + ignore_rest_of_line (); +} + +/* The target specific pseudo-ops which we support. */ +const pseudo_typeS md_pseudo_table[] = +{ + /* These are unimplemented. They're listed first so that we can use + the poc_value as the index into this array, to get the name of + the pseudo. So, keep these (1) first, and (2) in order, with (3) + the poc_value's in sequence. */ + { "btglb", rx_unimp, 0 }, + { "call", rx_unimp, 1 }, + { "einsf", rx_unimp, 2 }, + { "fb", rx_unimp, 3 }, + { "fbsym", rx_unimp, 4 }, + { "id", rx_unimp, 5 }, + { "initsct", rx_unimp, 6 }, + { "insf", rx_unimp, 7 }, + { "instr", rx_unimp, 8 }, + { "lbba", rx_unimp, 9 }, + { "len", rx_unimp, 10 }, + { "optj", rx_unimp, 11 }, + { "rvector", rx_unimp, 12 }, + { "sb", rx_unimp, 13 }, + { "sbbit", rx_unimp, 14 }, + { "sbsym", rx_unimp, 15 }, + { "sbsym16", rx_unimp, 16 }, + + /* These are the do-nothing pseudos. */ + { "stk", rx_nop, 0 }, + /* The manual documents ".stk" but the compiler emits ".stack". */ + { "stack", rx_nop, 0 }, + + /* Theae are Renesas as100 assembler pseudo-ops that we do support. */ + { "addr", rx_cons, 3 }, + { "align", s_align_bytes, 2 }, + { "byte", rx_cons, 1 }, + { "fixed", float_cons, 'f' }, + { "form", listing_psize, 0 }, + { "glb", s_globl, 0 }, + { "include", rx_include, 0 }, + { "list", rx_list, 0 }, + { "lword", rx_cons, 4 }, + { "mrepeat", rx_rept, 0 }, + { "section", rx_section, 0 }, + + /* FIXME: The following pseudo-ops place their values (and associated + label if present) in the data section, regardless of whatever + section we are currently in. At the moment this code does not + implement that part of the semantics. */ + { "blka", s_space, 3 }, + { "blkb", s_space, 1 }, + { "blkd", s_space, 8 }, + { "blkf", s_space, 4 }, + { "blkl", s_space, 4 }, + { "blkw", s_space, 2 }, + + /* Our "standard" pseudos. */ + { "double", rx_float_cons, 0 }, + { "bss", s_bss, 0 }, + { "3byte", cons, 3 }, + { "int", cons, 4 }, + { "word", cons, 4 }, + + /* End of list marker. */ + { NULL, NULL, 0 } +}; + +static asymbol * gp_symbol; + +void +md_begin (void) +{ + if (rx_use_small_data_limit) + /* Make the __gp symbol now rather + than after the symbol table is frozen. We only do this + when supporting small data limits because otherwise we + pollute the symbol table. */ + gp_symbol = symbol_get_bfdsym (symbol_find_or_make ("__gp")); +} + +char * rx_lex_start; +char * rx_lex_end; + +typedef struct rx_bytesT +{ + char base[4]; + int n_base; + char ops[8]; + int n_ops; + struct + { + expressionS exp; + char offset; + char nbits; + char type; /* RXREL_*. */ + int reloc; + fixS * fixP; + } fixups[2]; + int n_fixups; + struct + { + char type; + char field_pos; + char val_ofs; + } relax[2]; + int n_relax; + int link_relax; + fixS *link_relax_fixP; +} rx_bytesT; + +static rx_bytesT rx_bytes; + +void +rx_relax (int type, int pos) +{ + rx_bytes.relax[rx_bytes.n_relax].type = type; + rx_bytes.relax[rx_bytes.n_relax].field_pos = pos; + rx_bytes.relax[rx_bytes.n_relax].val_ofs = rx_bytes.n_base + rx_bytes.n_ops; + rx_bytes.n_relax ++; +} + +void +rx_linkrelax_dsp (int pos) +{ + switch (pos) + { + case 4: + rx_bytes.link_relax |= RX_RELAXA_DSP4; + break; + case 6: + rx_bytes.link_relax |= RX_RELAXA_DSP6; + break; + case 14: + rx_bytes.link_relax |= RX_RELAXA_DSP14; + break; + } +} + +void +rx_linkrelax_imm (int pos) +{ + switch (pos) + { + case 6: + rx_bytes.link_relax |= RX_RELAXA_IMM6; + break; + case 12: + rx_bytes.link_relax |= RX_RELAXA_IMM12; + break; + } +} + +void +rx_linkrelax_branch (void) +{ + rx_bytes.link_relax |= RX_RELAXA_BRA; +} + +static void +rx_fixup (expressionS exp, int offsetbits, int nbits, int type) +{ + rx_bytes.fixups[rx_bytes.n_fixups].exp = exp; + rx_bytes.fixups[rx_bytes.n_fixups].offset = offsetbits; + rx_bytes.fixups[rx_bytes.n_fixups].nbits = nbits; + rx_bytes.fixups[rx_bytes.n_fixups].type = type; + rx_bytes.fixups[rx_bytes.n_fixups].reloc = exp.X_md; + rx_bytes.n_fixups ++; +} + +#define rx_field_fixup(exp, offset, nbits, type) \ + rx_fixup (exp, offset, nbits, type) + +#define rx_op_fixup(exp, offset, nbits, type) \ + rx_fixup (exp, offset + 8 * rx_bytes.n_base, nbits, type) + +void +rx_base1 (int b1) +{ + rx_bytes.base[0] = b1; + rx_bytes.n_base = 1; +} + +void +rx_base2 (int b1, int b2) +{ + rx_bytes.base[0] = b1; + rx_bytes.base[1] = b2; + rx_bytes.n_base = 2; +} + +void +rx_base3 (int b1, int b2, int b3) +{ + rx_bytes.base[0] = b1; + rx_bytes.base[1] = b2; + rx_bytes.base[2] = b3; + rx_bytes.n_base = 3; +} + +void +rx_base4 (int b1, int b2, int b3, int b4) +{ + rx_bytes.base[0] = b1; + rx_bytes.base[1] = b2; + rx_bytes.base[2] = b3; + rx_bytes.base[3] = b4; + rx_bytes.n_base = 4; +} + +/* This gets complicated when the field spans bytes, because fields + are numbered from the MSB of the first byte as zero, and bits are + stored LSB towards the LSB of the byte. Thus, a simple four-bit + insertion of 12 at position 4 of 0x00 yields: 0x0b. A three-bit + insertion of b'MXL at position 7 is like this: + + - - - - - - - - - - - - - - - - + M X L */ + +void +rx_field (int val, int pos, int sz) +{ + int valm; + int bytep, bitp; + + if (sz > 0) + { + if (val < 0 || val >= (1 << sz)) + as_bad (_("Value %d doesn't fit in unsigned %d-bit field"), val, sz); + } + else + { + sz = - sz; + if (val < -(1 << (sz - 1)) || val >= (1 << (sz - 1))) + as_bad (_("Value %d doesn't fit in signed %d-bit field"), val, sz); + } + + /* This code points at 'M' in the above example. */ + bytep = pos / 8; + bitp = pos % 8; + + while (bitp + sz > 8) + { + int ssz = 8 - bitp; + int svalm; + + svalm = val >> (sz - ssz); + svalm = svalm & ((1 << ssz) - 1); + svalm = svalm << (8 - bitp - ssz); + gas_assert (bytep < rx_bytes.n_base); + rx_bytes.base[bytep] |= svalm; + + bitp = 0; + sz -= ssz; + bytep ++; + } + valm = val & ((1 << sz) - 1); + valm = valm << (8 - bitp - sz); + gas_assert (bytep < rx_bytes.n_base); + rx_bytes.base[bytep] |= valm; +} + +/* Special case of the above, for 3-bit displacements of 2..9. */ + +void +rx_disp3 (expressionS exp, int pos) +{ + rx_field_fixup (exp, pos, 3, RXREL_PCREL); +} + +/* Special case of the above, for split 5-bit displacements. Assumes + the displacement has been checked with rx_disp5op. */ +/* ---- -432 1--- 0--- */ + +void +rx_field5s (expressionS exp) +{ + int val; + + val = exp.X_add_number; + rx_bytes.base[0] |= val >> 2; + rx_bytes.base[1] |= (val << 6) & 0x80; + rx_bytes.base[1] |= (val << 3) & 0x08; +} + +/* ---- ---- 4--- 3210 */ + +void +rx_field5s2 (expressionS exp) +{ + int val; + + val = exp.X_add_number; + rx_bytes.base[1] |= (val << 3) & 0x80; + rx_bytes.base[1] |= (val ) & 0x0f; +} + +#define OP(x) rx_bytes.ops[rx_bytes.n_ops++] = (x) + +#define F_PRECISION 2 + +void +rx_op (expressionS exp, int nbytes, int type) +{ + int v = 0; + + if ((exp.X_op == O_constant || exp.X_op == O_big) + && type != RXREL_PCREL) + { + if (exp.X_op == O_big && exp.X_add_number <= 0) + { + LITTLENUM_TYPE w[2]; + char * ip = rx_bytes.ops + rx_bytes.n_ops; + + gen_to_words (w, F_PRECISION, 8); +#if RX_OPCODE_BIG_ENDIAN + ip[0] = w[0] >> 8; + ip[1] = w[0]; + ip[2] = w[1] >> 8; + ip[3] = w[1]; +#else + ip[3] = w[0] >> 8; + ip[2] = w[0]; + ip[1] = w[1] >> 8; + ip[0] = w[1]; +#endif + rx_bytes.n_ops += 4; + } + else + { + v = exp.X_add_number; + while (nbytes) + { +#if RX_OPCODE_BIG_ENDIAN + OP ((v >> (8 * (nbytes - 1))) & 0xff); +#else + OP (v & 0xff); + v >>= 8; +#endif + nbytes --; + } + } + } + else + { + rx_op_fixup (exp, rx_bytes.n_ops * 8, nbytes * 8, type); + memset (rx_bytes.ops + rx_bytes.n_ops, 0, nbytes); + rx_bytes.n_ops += nbytes; + } +} + +int +rx_wrap (void) +{ + return 0; +} + +#define APPEND(B, N_B) \ + if (rx_bytes.N_B) \ + { \ + memcpy (bytes + idx, rx_bytes.B, rx_bytes.N_B); \ + idx += rx_bytes.N_B; \ + } + +void +rx_frag_init (fragS * fragP) +{ + if (rx_bytes.n_relax || rx_bytes.link_relax) + { + fragP->tc_frag_data = malloc (sizeof (rx_bytesT)); + memcpy (fragP->tc_frag_data, & rx_bytes, sizeof (rx_bytesT)); + } + else + fragP->tc_frag_data = 0; +} + +/* Handle the as100's version of the .equ pseudo-op. It has the syntax: + <symbol_name> .equ <expression> */ + +static void +rx_equ (char * name, char * expr) +{ + char saved_name_end_char; + char * name_end; + char * saved_ilp; + + while (ISSPACE (* name)) + name ++; + + for (name_end = name + 1; *name_end; name_end ++) + if (! ISALNUM (* name_end)) + break; + + saved_name_end_char = * name_end; + * name_end = 0; + + saved_ilp = input_line_pointer; + input_line_pointer = expr; + + equals (name, 1); + + input_line_pointer = saved_ilp; + * name_end = saved_name_end_char; +} + +/* Look for Renesas as100 pseudo-ops that occur after a symbol name + rather than at the start of a line. (eg .EQU or .DEFINE). If one + is found, process it and return TRUE otherwise return FALSE. */ + +static bfd_boolean +scan_for_infix_rx_pseudo_ops (char * str) +{ + char * p; + char * pseudo_op; + char * dot = strchr (str, '.'); + + if (dot == NULL || dot == str) + return FALSE; + + /* A real pseudo-op must be preceeded by whitespace. */ + if (dot[-1] != ' ' && dot[-1] != '\t') + return FALSE; + + pseudo_op = dot + 1; + + if (!ISALNUM (* pseudo_op)) + return FALSE; + + for (p = pseudo_op + 1; ISALNUM (* p); p++) + ; + + if (strncasecmp ("EQU", pseudo_op, p - pseudo_op) == 0) + rx_equ (str, p); + else if (strncasecmp ("DEFINE", pseudo_op, p - pseudo_op) == 0) + as_warn (_("The .DEFINE pseudo-op is not implemented")); + else if (strncasecmp ("MACRO", pseudo_op, p - pseudo_op) == 0) + as_warn (_("The .MACRO pseudo-op is not implemented")); + else if (strncasecmp ("BTEQU", pseudo_op, p - pseudo_op) == 0) + as_warn (_("The .BTEQU pseudo-op is not implemented.")); + else + return FALSE; + + return TRUE; +} + +void +md_assemble (char * str) +{ + char * bytes; + int idx = 0; + int i, rel; + fragS * frag_then = frag_now; + expressionS *exp; + + memset (& rx_bytes, 0, sizeof (rx_bytes)); + + rx_lex_init (str, str + strlen (str)); + if (scan_for_infix_rx_pseudo_ops (str)) + return; + rx_parse (); + + /* This simplifies the relaxation code. */ + if (rx_bytes.n_relax || rx_bytes.link_relax) + { + /* We do it this way because we want the frag to have the + rx_bytes in it, which we initialize above. */ + bytes = frag_more (12); + frag_then = frag_now; + frag_variant (rs_machine_dependent, + 0 /* max_chars */, + 0 /* var */, + 0 /* subtype */, + 0 /* symbol */, + 0 /* offset */, + 0 /* opcode */); + frag_then->fr_opcode = bytes; + frag_then->fr_fix += rx_bytes.n_base + rx_bytes.n_ops; + frag_then->fr_subtype = rx_bytes.n_base + rx_bytes.n_ops; + } + else + { + bytes = frag_more (rx_bytes.n_base + rx_bytes.n_ops); + frag_then = frag_now; + } + + APPEND (base, n_base); + APPEND (ops, n_ops); + + if (rx_bytes.link_relax && rx_bytes.n_fixups) + { + fixS * f; + + f = fix_new (frag_then, + (char *) bytes - frag_then->fr_literal, + 0, + abs_section_sym, + rx_bytes.link_relax | rx_bytes.n_fixups, + 0, + BFD_RELOC_RX_RELAX); + frag_then->tc_frag_data->link_relax_fixP = f; + } + + for (i = 0; i < rx_bytes.n_fixups; i ++) + { + /* index: [nbytes][type] */ + static int reloc_map[5][4] = + { + { 0, 0, 0, BFD_RELOC_RX_DIR3U_PCREL }, + { BFD_RELOC_8, BFD_RELOC_RX_8U, BFD_RELOC_RX_NEG8, BFD_RELOC_8_PCREL }, + { BFD_RELOC_RX_16_OP, BFD_RELOC_RX_16U, BFD_RELOC_RX_NEG16, BFD_RELOC_16_PCREL }, + { BFD_RELOC_RX_24_OP, BFD_RELOC_RX_24U, BFD_RELOC_RX_NEG24, BFD_RELOC_24_PCREL }, + { BFD_RELOC_RX_32_OP, BFD_RELOC_32, BFD_RELOC_RX_NEG32, BFD_RELOC_32_PCREL }, + }; + fixS * f; + + idx = rx_bytes.fixups[i].offset / 8; + rel = reloc_map [rx_bytes.fixups[i].nbits / 8][(int) rx_bytes.fixups[i].type]; + + if (rx_bytes.fixups[i].reloc) + rel = rx_bytes.fixups[i].reloc; + + if (frag_then->tc_frag_data) + exp = & frag_then->tc_frag_data->fixups[i].exp; + else + exp = & rx_bytes.fixups[i].exp; + + f = fix_new_exp (frag_then, + (char *) bytes + idx - frag_then->fr_literal, + rx_bytes.fixups[i].nbits / 8, + exp, + rx_bytes.fixups[i].type == RXREL_PCREL ? 1 : 0, + rel); + if (frag_then->tc_frag_data) + frag_then->tc_frag_data->fixups[i].fixP = f; + } + + dwarf2_emit_insn (idx); +} + +void +rx_md_end (void) +{ +} + +/* Write a value out to the object file, using the appropriate endianness. */ + +void +md_number_to_chars (char * buf, valueT val, int n) +{ + if (target_big_endian) + number_to_chars_bigendian (buf, val, n); + else + number_to_chars_littleendian (buf, val, n); +} + +static struct +{ + char * fname; + int reloc; +} +reloc_functions[] = +{ + { "gp", BFD_RELOC_GPREL16 }, + { 0, 0 } +}; + +void +md_operand (expressionS * exp ATTRIBUTE_UNUSED) +{ + int reloc = 0; + int i; + + for (i = 0; reloc_functions[i].fname; i++) + { + int flen = strlen (reloc_functions[i].fname); + + if (input_line_pointer[0] == '%' + && strncasecmp (input_line_pointer + 1, reloc_functions[i].fname, flen) == 0 + && input_line_pointer[flen + 1] == '(') + { + reloc = reloc_functions[i].reloc; + input_line_pointer += flen + 2; + break; + } + } + if (reloc == 0) + return; + + expression (exp); + if (* input_line_pointer == ')') + input_line_pointer ++; + + exp->X_md = reloc; +} + +valueT +md_section_align (segT segment, valueT size) +{ + int align = bfd_get_section_alignment (stdoutput, segment); + return ((size + (1 << align) - 1) & (-1 << align)); +} + +/* When relaxing, we need to output a reloc for any .align directive + so that we can retain this alignment as we adjust opcode sizes. */ +void +rx_handle_align (fragS * frag) +{ + if (linkrelax + && (frag->fr_type == rs_align + || frag->fr_type == rs_align_code) + && frag->fr_address + frag->fr_fix > 0 + && frag->fr_offset > 0 + && now_seg != bss_section) + { + fix_new (frag, frag->fr_fix, 0, + &abs_symbol, RX_RELAXA_ALIGN + frag->fr_offset, + 0, BFD_RELOC_RX_RELAX); + /* For the purposes of relaxation, this relocation is attached + to the byte *after* the alignment - i.e. the byte that must + remain aligned. */ + fix_new (frag->fr_next, 0, 0, + &abs_symbol, RX_RELAXA_ELIGN + frag->fr_offset, + 0, BFD_RELOC_RX_RELAX); + } +} + +char * +md_atof (int type, char * litP, int * sizeP) +{ + return ieee_md_atof (type, litP, sizeP, target_big_endian); +} + +symbolS * +md_undefined_symbol (char * name ATTRIBUTE_UNUSED) +{ + return NULL; +} + +/*----------------------------------------------------------------------*/ +/* To recap: we estimate everything based on md_estimate_size, then + adjust based on rx_relax_frag. When it all settles, we call + md_convert frag to update the bytes. The relaxation types and + relocations are in fragP->tc_frag_data, which is a copy of that + rx_bytes. + + Our scheme is as follows: fr_fix has the size of the smallest + opcode (like BRA.S). We store the number of total bytes we need in + fr_subtype. When we're done relaxing, we use fr_subtype and the + existing opcode bytes to figure out what actual opcode we need to + put in there. If the fixup isn't resolvable now, we use the + maximal size. */ + +#define TRACE_RELAX 0 +#define tprintf if (TRACE_RELAX) printf + +typedef enum +{ + OT_other, + OT_bra, + OT_beq, + OT_bne, + OT_bsr, + OT_bcc +} op_type_T; + +/* We're looking for these types of relaxations: + + BRA.S 00001dsp + BRA.B 00101110 dspppppp + BRA.W 00111000 dspppppp pppppppp + BRA.A 00000100 dspppppp pppppppp pppppppp + + BEQ.S 00010dsp + BEQ.B 00100000 dspppppp + BEQ.W 00111010 dspppppp pppppppp + + BNE.S 00011dsp + BNE.B 00100001 dspppppp + BNE.W 00111011 dspppppp pppppppp + + BSR.W 00111001 dspppppp pppppppp + BSR.A 00000101 dspppppp pppppppp pppppppp + + Bcc.B 0010cond dspppppp + + Additionally, we can synthesize longer conditional branches using + pairs of opcodes, one with an inverted conditional (flip LSB): + + Bcc.W 0010ncnd 00000110 00111000 dspppppp pppppppp + Bcc.A 0010ncnd 00000111 00000100 dspppppp pppppppp pppppppp + BEQ.A 00011100 00000100 dspppppp pppppppp pppppppp + BNE.A 00010100 00000100 dspppppp pppppppp pppppppp */ + +/* Given the opcode bytes at OP, figure out which opcode it is and + return the type of opcode. We use this to re-encode the opcode as + a different size later. */ + +static op_type_T +rx_opcode_type (char * op) +{ + unsigned char b = (unsigned char) op[0]; + + switch (b & 0xf8) + { + case 0x08: return OT_bra; + case 0x10: return OT_beq; + case 0x18: return OT_bne; + } + + switch (b) + { + case 0x2e: return OT_bra; + case 0x38: return OT_bra; + case 0x04: return OT_bra; + + case 0x20: return OT_beq; + case 0x3a: return OT_beq; + + case 0x21: return OT_bne; + case 0x3b: return OT_bne; + + case 0x39: return OT_bsr; + case 0x05: return OT_bsr; + } + + if ((b & 0xf0) == 0x20) + return OT_bcc; + + return OT_other; +} + +/* Returns zero if *addrP has the target address. Else returns nonzero + if we cannot compute the target address yet. */ + +static int +rx_frag_fix_value (fragS * fragP, + segT segment, + int which, + addressT * addrP, + int need_diff, + addressT * sym_addr) +{ + addressT addr = 0; + rx_bytesT * b = fragP->tc_frag_data; + expressionS * exp = & b->fixups[which].exp; + + if (need_diff && exp->X_op != O_subtract) + return 1; + + if (exp->X_add_symbol) + { + if (S_FORCE_RELOC (exp->X_add_symbol, 1)) + return 1; + if (S_GET_SEGMENT (exp->X_add_symbol) != segment) + return 1; + addr += S_GET_VALUE (exp->X_add_symbol); + } + + if (exp->X_op_symbol) + { + if (exp->X_op != O_subtract) + return 1; + if (S_FORCE_RELOC (exp->X_op_symbol, 1)) + return 1; + if (S_GET_SEGMENT (exp->X_op_symbol) != segment) + return 1; + addr -= S_GET_VALUE (exp->X_op_symbol); + } + if (sym_addr) + * sym_addr = addr; + addr += exp->X_add_number; + * addrP = addr; + return 0; +} + +/* Estimate how big the opcode is after this relax pass. The return + value is the difference between fr_fix and the actual size. We + compute the total size in rx_relax_frag and store it in fr_subtype, + sowe only need to subtract fx_fix and return it. */ + +int +md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED, segT segment ATTRIBUTE_UNUSED) +{ + int opfixsize; + int delta; + + tprintf ("\033[32m est frag: addr %08lx fix %ld var %ld ofs %ld lit %p opc %p type %d sub %d\033[0m\n", + fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal), + fragP->fr_fix, fragP->fr_var, fragP->fr_offset, + fragP->fr_literal, fragP->fr_opcode, fragP->fr_type, fragP->fr_subtype); + + /* This is the size of the opcode that's accounted for in fr_fix. */ + opfixsize = fragP->fr_fix - (fragP->fr_opcode - fragP->fr_literal); + /* This is the size of the opcode that isn't. */ + delta = (fragP->fr_subtype - opfixsize); + + tprintf (" -> opfixsize %d delta %d\n", opfixsize, delta); + return delta; +} + +/* Given the new addresses for this relax pass, figure out how big + each opcode must be. We store the total number of bytes needed in + fr_subtype. The return value is the difference between the size + after the last pass and the size after this pass, so we use the old + fr_subtype to calculate the difference. */ + +int +rx_relax_frag (segT segment ATTRIBUTE_UNUSED, fragS * fragP, long stretch) +{ + addressT addr0, sym_addr; + addressT mypc; + int disp; + int oldsize = fragP->fr_subtype; + int newsize = oldsize; + op_type_T optype; + /* Index of relaxation we care about. */ + int ri; + + tprintf ("\033[36mrelax frag: addr %08lx fix %ld var %ld ofs %ld lit %p opc %p type %d sub %d str %ld\033[0m\n", + fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal), + fragP->fr_fix, fragP->fr_var, fragP->fr_offset, + fragP->fr_literal, fragP->fr_opcode, fragP->fr_type, fragP->fr_subtype, stretch); + + optype = rx_opcode_type (fragP->fr_opcode); + + /* In the one case where we have both a disp and imm relaxation, we want + the imm relaxation here. */ + ri = 0; + if (fragP->tc_frag_data->n_relax > 1 + && fragP->tc_frag_data->relax[0].type == RX_RELAX_DISP) + ri = 1; + + /* Try to get the target address. */ + if (rx_frag_fix_value (fragP, segment, ri, & addr0, + fragP->tc_frag_data->relax[ri].type != RX_RELAX_BRANCH, + & sym_addr)) + { + /* If we don't, we must use the maximum size for the linker. + Note that we don't use synthetically expanded conditionals + for this. */ + switch (fragP->tc_frag_data->relax[ri].type) + { + case RX_RELAX_BRANCH: + switch (optype) + { + case OT_bra: + case OT_bsr: + newsize = 4; + break; + case OT_beq: + case OT_bne: + newsize = 3; + break; + case OT_bcc: + newsize = 2; + break; + case OT_other: + newsize = oldsize; + break; + } + break; + + case RX_RELAX_IMM: + newsize = fragP->tc_frag_data->relax[ri].val_ofs + 4; + break; + } + fragP->fr_subtype = newsize; + tprintf (" -> new %d old %d delta %d (external)\n", newsize, oldsize, newsize-oldsize); + return newsize - oldsize; + } + + mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal); + if (sym_addr > mypc) + addr0 += stretch; + + switch (fragP->tc_frag_data->relax[ri].type) + { + case RX_RELAX_BRANCH: + tprintf ("branch, addr %08lx pc %08lx disp %ld\n", addr0, mypc, addr0-mypc); + disp = (int) addr0 - (int) mypc; + + switch (optype) + { + case OT_bcc: + if (disp >= -128 && (disp - (oldsize-2)) <= 127) + /* bcc.b */ + newsize = 2; + else if (disp >= -32768 && (disp - (oldsize-5)) <= 32767) + /* bncc.b/bra.w */ + newsize = 5; + else + /* bncc.b/bra.a */ + newsize = 6; + break; + + case OT_beq: + case OT_bne: + if ((disp - (oldsize-1)) >= 3 && (disp - (oldsize-1)) <= 10 && !linkrelax) + /* beq.s */ + newsize = 1; + else if (disp >= -128 && (disp - (oldsize-2)) <= 127) + /* beq.b */ + newsize = 2; + else if (disp >= -32768 && (disp - (oldsize-3)) <= 32767) + /* beq.w */ + newsize = 3; + else + /* bne.s/bra.a */ + newsize = 5; + break; + + case OT_bra: + case OT_bsr: + if ((disp - (oldsize-1)) >= 3 && (disp - (oldsize-1)) <= 10 && !linkrelax) + /* bra.s */ + newsize = 1; + else if (disp >= -128 && (disp - (oldsize-2)) <= 127) + /* bra.b */ + newsize = 2; + else if (disp >= -32768 && (disp - (oldsize-3)) <= 32767) + /* bra.w */ + newsize = 3; + else + /* bra.a */ + newsize = 4; + break; + + case OT_other: + break; + } + tprintf (" - newsize %d\n", newsize); + break; + + case RX_RELAX_IMM: + tprintf ("other, addr %08lx pc %08lx LI %d OF %d\n", addr0, mypc, + fragP->tc_frag_data->relax[ri].field_pos, + fragP->tc_frag_data->relax[ri].val_ofs); + + newsize = fragP->tc_frag_data->relax[ri].val_ofs; + + if ((long) addr0 >= -128 && (long) addr0 <= 127) + newsize += 1; + else if ((long) addr0 >= -32768 && (long) addr0 <= 32767) + newsize += 2; + else if ((long) addr0 >= -8388608 && (long) addr0 <= 8388607) + newsize += 3; + else + newsize += 4; + break; + + default: + break; + } + + if (fragP->tc_frag_data->relax[ri].type == RX_RELAX_BRANCH) + switch (optype) + { + case OT_bra: + case OT_bcc: + case OT_beq: + case OT_bne: + break; + case OT_bsr: + if (newsize < 3) + newsize = 3; + break; + case OT_other: + break; + } + + fragP->fr_subtype = newsize; + tprintf (" -> new %d old %d delta %d\n", newsize, oldsize, newsize-oldsize); + return newsize - oldsize; +} + +/* This lets us test for the opcode type and the desired size in a + switch statement. */ +#define OPCODE(type,size) ((type) * 16 + (size)) + +/* Given the opcode stored in fr_opcode and the number of bytes we + think we need, encode a new opcode. We stored a pointer to the + fixup for this opcode in the tc_frag_data structure. If we can do + the fixup here, we change the relocation type to "none" (we test + for that in tc_gen_reloc) else we change it to the right type for + the new (biggest) opcode. */ + +void +md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, + segT segment ATTRIBUTE_UNUSED, + fragS * fragP ATTRIBUTE_UNUSED) +{ + rx_bytesT * rxb = fragP->tc_frag_data; + addressT addr0, mypc; + int disp; + int reloc_type, reloc_adjust; + char * op = fragP->fr_opcode; + int keep_reloc = 0; + int ri; + int fi = (rxb->n_fixups > 1) ? 1 : 0; + fixS * fix = rxb->fixups[fi].fixP; + + tprintf ("\033[31mconvrt frag: addr %08lx fix %ld var %ld ofs %ld lit %p opc %p type %d sub %d\033[0m\n", + fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal), + fragP->fr_fix, fragP->fr_var, fragP->fr_offset, + fragP->fr_literal, fragP->fr_opcode, fragP->fr_type, fragP->fr_subtype); + +#if TRACE_RELAX + { + int i; + + printf ("lit %08x opc %08x", (int) fragP->fr_literal, (int) fragP->fr_opcode); + for (i = 0; i < 10; i++) + printf (" %02x", (unsigned char) (fragP->fr_opcode[i])); + printf ("\n"); + } +#endif + + /* In the one case where we have both a disp and imm relaxation, we want + the imm relaxation here. */ + ri = 0; + if (fragP->tc_frag_data->n_relax > 1 + && fragP->tc_frag_data->relax[0].type == RX_RELAX_DISP) + ri = 1; + + /* Try to get the target address. If we fail here, we just use the + largest format. */ + if (rx_frag_fix_value (fragP, segment, 0, & addr0, + fragP->tc_frag_data->relax[ri].type != RX_RELAX_BRANCH, 0)) + keep_reloc = 1; + + if (linkrelax) + keep_reloc = 1; + + /* We used a new frag for this opcode, so the opcode address should + be the frag address. */ + mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal); + disp = (int) addr0 - (int) mypc; + + reloc_type = BFD_RELOC_NONE; + reloc_adjust = 0; + + tprintf ("convert, op is %d, disp %d (%lx-%lx)\n", rx_opcode_type (fragP->fr_opcode), disp, addr0, mypc); + switch (fragP->tc_frag_data->relax[ri].type) + { + case RX_RELAX_BRANCH: + switch (OPCODE (rx_opcode_type (fragP->fr_opcode), fragP->fr_subtype)) + { + case OPCODE (OT_bra, 1): /* BRA.S - no change. */ + op[0] = 0x08 + (disp & 7); + break; + case OPCODE (OT_bra, 2): /* BRA.B - 8 bit. */ + op[0] = 0x2e; + op[1] = disp; + reloc_type = keep_reloc ? BFD_RELOC_8_PCREL : BFD_RELOC_NONE; + reloc_adjust = 1; + break; + case OPCODE (OT_bra, 3): /* BRA.W - 16 bit. */ + op[0] = 0x38; +#if RX_OPCODE_BIG_ENDIAN + op[1] = (disp >> 8) & 0xff; + op[2] = disp; +#else + op[2] = (disp >> 8) & 0xff; + op[1] = disp; +#endif + reloc_adjust = 1; + reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; + break; + case OPCODE (OT_bra, 4): /* BRA.A - 24 bit. */ + op[0] = 0x04; +#if RX_OPCODE_BIG_ENDIAN + op[1] = (disp >> 16) & 0xff; + op[2] = (disp >> 8) & 0xff; + op[3] = disp; +#else + op[3] = (disp >> 16) & 0xff; + op[2] = (disp >> 8) & 0xff; + op[1] = disp; +#endif + reloc_type = keep_reloc ? BFD_RELOC_24_PCREL : BFD_RELOC_NONE; + reloc_adjust = 1; + break; + + case OPCODE (OT_beq, 1): /* BEQ.S - no change. */ + op[0] = 0x10 + (disp & 7); + break; + case OPCODE (OT_beq, 2): /* BEQ.B - 8 bit. */ + op[0] = 0x20; + op[1] = disp; + reloc_adjust = 1; + reloc_type = keep_reloc ? BFD_RELOC_8_PCREL : BFD_RELOC_NONE; + break; + case OPCODE (OT_beq, 3): /* BEQ.W - 16 bit. */ + op[0] = 0x3a; +#if RX_OPCODE_BIG_ENDIAN + op[1] = (disp >> 8) & 0xff; + op[2] = disp; +#else + op[2] = (disp >> 8) & 0xff; + op[1] = disp; +#endif + reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; + reloc_adjust = 1; + break; + case OPCODE (OT_beq, 5): /* BEQ.A - synthetic. */ + op[0] = 0x1e; /* bne.s .+4. */ + op[1] = 0x04; /* bra.a dsp:24. */ + disp -= 1; +#if RX_OPCODE_BIG_ENDIAN + op[2] = (disp >> 16) & 0xff; + op[3] = (disp >> 8) & 0xff; + op[4] = disp; +#else + op[4] = (disp >> 16) & 0xff; + op[3] = (disp >> 8) & 0xff; + op[2] = disp; +#endif + reloc_type = keep_reloc ? BFD_RELOC_24_PCREL : BFD_RELOC_NONE; + reloc_adjust = 2; + break; + + case OPCODE (OT_bne, 1): /* BNE.S - no change. */ + op[0] = 0x18 + (disp & 7); + break; + case OPCODE (OT_bne, 2): /* BNE.B - 8 bit. */ + op[0] = 0x21; + op[1] = disp; + reloc_adjust = 1; + reloc_type = keep_reloc ? BFD_RELOC_8_PCREL : BFD_RELOC_NONE; + break; + case OPCODE (OT_bne, 3): /* BNE.W - 16 bit. */ + op[0] = 0x3b; +#if RX_OPCODE_BIG_ENDIAN + op[1] = (disp >> 8) & 0xff; + op[2] = disp; +#else + op[2] = (disp >> 8) & 0xff; + op[1] = disp; +#endif + reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; + reloc_adjust = 1; + break; + case OPCODE (OT_bne, 5): /* BNE.A - synthetic. */ + op[0] = 0x15; /* beq.s .+4. */ + op[1] = 0x04; /* bra.a dsp:24. */ + disp -= 1; +#if RX_OPCODE_BIG_ENDIAN + op[2] = (disp >> 16) & 0xff; + op[3] = (disp >> 8) & 0xff; + op[4] = disp; +#else + op[4] = (disp >> 16) & 0xff; + op[3] = (disp >> 8) & 0xff; + op[2] = disp; +#endif + reloc_type = keep_reloc ? BFD_RELOC_24_PCREL : BFD_RELOC_NONE; + reloc_adjust = 2; + break; + + case OPCODE (OT_bsr, 3): /* BSR.W - 16 bit. */ + op[0] = 0x39; +#if RX_OPCODE_BIG_ENDIAN + op[1] = (disp >> 8) & 0xff; + op[2] = disp; +#else + op[2] = (disp >> 8) & 0xff; + op[1] = disp; +#endif + reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; + reloc_adjust = 0; + break; + case OPCODE (OT_bsr, 4): /* BSR.A - 24 bit. */ + op[0] = 0x05; +#if RX_OPCODE_BIG_ENDIAN + op[1] = (disp >> 16) & 0xff; + op[2] = (disp >> 8) & 0xff; + op[3] = disp; +#else + op[3] = (disp >> 16) & 0xff; + op[2] = (disp >> 8) & 0xff; + op[1] = disp; +#endif + reloc_type = keep_reloc ? BFD_RELOC_24_PCREL : BFD_RELOC_NONE; + reloc_adjust = 0; + break; + + case OPCODE (OT_bcc, 2): /* Bcond.B - 8 bit. */ + op[1] = disp; + reloc_type = keep_reloc ? BFD_RELOC_8_PCREL : BFD_RELOC_NONE; + break; + case OPCODE (OT_bcc, 5): /* Bcond.W - synthetic. */ + op[0] ^= 1; /* Invert condition. */ + op[1] = 5; /* Displacement. */ + op[2] = 0x38; + disp -= 2; +#if RX_OPCODE_BIG_ENDIAN + op[3] = (disp >> 8) & 0xff; + op[4] = disp; +#else + op[4] = (disp >> 8) & 0xff; + op[3] = disp; +#endif + reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; + reloc_adjust = 2; + break; + case OPCODE (OT_bcc, 6): /* Bcond.S - synthetic. */ + op[0] ^= 1; /* Invert condition. */ + op[1] = 6; /* Displacement. */ + op[2] = 0x04; + disp -= 2; +#if RX_OPCODE_BIG_ENDIAN + op[3] = (disp >> 16) & 0xff; + op[4] = (disp >> 8) & 0xff; + op[5] = disp; +#else + op[5] = (disp >> 16) & 0xff; + op[4] = (disp >> 8) & 0xff; + op[3] = disp; +#endif + reloc_type = keep_reloc ? BFD_RELOC_24_PCREL : BFD_RELOC_NONE; + reloc_adjust = 2; + break; + + default: + /* These are opcodes we'll relax in th linker, later. */ + if (rxb->n_fixups) + reloc_type = rxb->fixups[ri].fixP->fx_r_type; + break; + } + break; + + case RX_RELAX_IMM: + { + int nbytes = fragP->fr_subtype - fragP->tc_frag_data->relax[ri].val_ofs; + int li; + char * imm = op + fragP->tc_frag_data->relax[ri].val_ofs; + + switch (nbytes) + { + case 1: + li = 1; + imm[0] = addr0; + reloc_type = BFD_RELOC_8; + break; + case 2: + li = 2; +#if RX_OPCODE_BIG_ENDIAN + imm[1] = addr0; + imm[0] = addr0 >> 8; +#else + imm[0] = addr0; + imm[1] = addr0 >> 8; +#endif + reloc_type = BFD_RELOC_RX_16_OP; + break; + case 3: + li = 3; +#if RX_OPCODE_BIG_ENDIAN + imm[2] = addr0; + imm[1] = addr0 >> 8; + imm[0] = addr0 >> 16; +#else + imm[0] = addr0; + imm[1] = addr0 >> 8; + imm[2] = addr0 >> 16; +#endif + reloc_type = BFD_RELOC_RX_24_OP; + break; + case 4: + li = 0; +#if RX_OPCODE_BIG_ENDIAN + imm[3] = addr0; + imm[2] = addr0 >> 8; + imm[1] = addr0 >> 16; + imm[0] = addr0 >> 24; +#else + imm[0] = addr0; + imm[1] = addr0 >> 8; + imm[2] = addr0 >> 16; + imm[3] = addr0 >> 24; +#endif + reloc_type = BFD_RELOC_RX_32_OP; + break; + default: + as_bad (_("invalid immediate size")); + li = -1; + } + + switch (fragP->tc_frag_data->relax[ri].field_pos) + { + case 6: + op[0] &= 0xfc; + op[0] |= li; + break; + case 12: + op[1] &= 0xf3; + op[1] |= li << 2; + break; + case 20: + op[2] &= 0xf3; + op[2] |= li << 2; + break; + default: + as_bad (_("invalid immediate field position")); + } + } + break; + + default: + if (rxb->n_fixups) + { + reloc_type = fix->fx_r_type; + reloc_adjust = 0; + } + break; + } + + if (rxb->n_fixups) + { + + fix->fx_r_type = reloc_type; + fix->fx_where += reloc_adjust; + switch (reloc_type) + { + case BFD_RELOC_NONE: + fix->fx_size = 0; + break; + case BFD_RELOC_8: + fix->fx_size = 1; + break; + case BFD_RELOC_16_PCREL: + case BFD_RELOC_RX_16_OP: + fix->fx_size = 2; + break; + case BFD_RELOC_24_PCREL: + case BFD_RELOC_RX_24_OP: + fix->fx_size = 3; + break; + case BFD_RELOC_RX_32_OP: + fix->fx_size = 4; + break; + } + } + + fragP->fr_fix = fragP->fr_subtype + (fragP->fr_opcode - fragP->fr_literal); + tprintf ("fragP->fr_fix now %ld (%d + (%p - %p)\n", fragP->fr_fix, + fragP->fr_subtype, fragP->fr_opcode, fragP->fr_literal); + fragP->fr_var = 0; + + if (fragP->fr_next != NULL + && ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) + != fragP->fr_fix)) + as_bad (_("bad frag at %p : fix %ld addr %ld %ld \n"), fragP, + fragP->fr_fix, fragP->fr_address, fragP->fr_next->fr_address); +} + +#undef OPCODE + +int +rx_validate_fix_sub (struct fix * f) +{ + /* We permit the subtraction of two symbols as a 32-bit relocation. */ + if (f->fx_r_type == BFD_RELOC_RX_DIFF + && ! f->fx_pcrel + && f->fx_size == 4) + return 1; + return 0; +} + +long +md_pcrel_from_section (fixS * fixP, segT sec) +{ + long rv; + + if (fixP->fx_addsy != NULL + && (! S_IS_DEFINED (fixP->fx_addsy) + || S_GET_SEGMENT (fixP->fx_addsy) != sec)) + /* The symbol is undefined (or is defined but not in this section). + Let the linker figure it out. */ + return 0; + + rv = fixP->fx_frag->fr_address + fixP->fx_where; + switch (fixP->fx_r_type) + { + case BFD_RELOC_RX_DIR3U_PCREL: + return rv; + default: + return rv - 1; + } +} + +void +rx_cons_fix_new (fragS * frag, + int where, + int size, + expressionS * exp) +{ + bfd_reloc_code_real_type type; + + switch (size) + { + case 1: + type = BFD_RELOC_8; + break; + case 2: + type = BFD_RELOC_16; + break; + case 3: + type = BFD_RELOC_24; + break; + case 4: + type = BFD_RELOC_32; + break; + default: + as_bad (_("unsupported constant size %d\n"), size); + return; + } + + if (exp->X_op == O_subtract && exp->X_op_symbol) + { + if (size != 4 && size != 2 && size != 1) + as_bad (_("difference of two symbols only supported with .long, .short, or .byte")); + else + type = BFD_RELOC_RX_DIFF; + } + + fix_new_exp (frag, where, (int) size, exp, 0, type); +} + +void +md_apply_fix (struct fix * f ATTRIBUTE_UNUSED, + valueT * t ATTRIBUTE_UNUSED, + segT s ATTRIBUTE_UNUSED) +{ + /* Instruction bytes are always little endian. */ + char * op; + unsigned long val; + + if (f->fx_addsy && S_FORCE_RELOC (f->fx_addsy, 1)) + return; + if (f->fx_subsy && S_FORCE_RELOC (f->fx_subsy, 1)) + return; + +#define OP2(x) op[target_big_endian ? 1-x : x] +#define OP3(x) op[target_big_endian ? 2-x : x] +#define OP4(x) op[target_big_endian ? 3-x : x] + + op = f->fx_frag->fr_literal + f->fx_where; + val = (unsigned long) * t; + + /* Opcode words are always the same endian. Data words are either + big or little endian. */ + + switch (f->fx_r_type) + { + case BFD_RELOC_NONE: + break; + + case BFD_RELOC_RX_RELAX: + f->fx_done = 1; + break; + + case BFD_RELOC_RX_DIR3U_PCREL: + if (val < 3 || val > 10) + as_bad_where (f->fx_file, f->fx_line, + _("jump not 3..10 bytes away (is %d)"), (int) val); + op[0] &= 0xf8; + op[0] |= val & 0x07; + break; + + case BFD_RELOC_8: + case BFD_RELOC_8_PCREL: + case BFD_RELOC_RX_8U: + op[0] = val; + break; + + case BFD_RELOC_16: + OP2(1) = val & 0xff; + OP2(0) = (val >> 8) & 0xff; + break; + + case BFD_RELOC_16_PCREL: + case BFD_RELOC_RX_16_OP: + case BFD_RELOC_RX_16U: +#if RX_OPCODE_BIG_ENDIAN + op[1] = val & 0xff; + op[0] = (val >> 8) & 0xff; +#else + op[0] = val & 0xff; + op[1] = (val >> 8) & 0xff; +#endif + break; + + case BFD_RELOC_24: + OP3(0) = val & 0xff; + OP3(1) = (val >> 8) & 0xff; + OP3(2) = (val >> 16) & 0xff; + break; + + case BFD_RELOC_24_PCREL: + case BFD_RELOC_RX_24_OP: + case BFD_RELOC_RX_24U: +#if RX_OPCODE_BIG_ENDIAN + op[2] = val & 0xff; + op[1] = (val >> 8) & 0xff; + op[0] = (val >> 16) & 0xff; +#else + op[0] = val & 0xff; + op[1] = (val >> 8) & 0xff; + op[2] = (val >> 16) & 0xff; +#endif + break; + + case BFD_RELOC_RX_DIFF: + switch (f->fx_size) + { + case 1: + op[0] = val & 0xff; + break; + case 2: + OP2(0) = val & 0xff; + OP2(1) = (val >> 8) & 0xff; + break; + case 4: + OP4(0) = val & 0xff; + OP4(1) = (val >> 8) & 0xff; + OP4(2) = (val >> 16) & 0xff; + OP4(3) = (val >> 24) & 0xff; + break; + } + break; + + case BFD_RELOC_32: + OP4(0) = val & 0xff; + OP4(1) = (val >> 8) & 0xff; + OP4(2) = (val >> 16) & 0xff; + OP4(3) = (val >> 24) & 0xff; + break; + + case BFD_RELOC_RX_32_OP: +#if RX_OPCODE_BIG_ENDIAN + op[3] = val & 0xff; + op[2] = (val >> 8) & 0xff; + op[1] = (val >> 16) & 0xff; + op[0] = (val >> 24) & 0xff; +#else + op[0] = val & 0xff; + op[1] = (val >> 8) & 0xff; + op[2] = (val >> 16) & 0xff; + op[3] = (val >> 24) & 0xff; +#endif + break; + + case BFD_RELOC_RX_NEG8: + op[0] = - val; + break; + + case BFD_RELOC_RX_NEG16: + val = -val; +#if RX_OPCODE_BIG_ENDIAN + op[1] = val & 0xff; + op[0] = (val >> 8) & 0xff; +#else + op[0] = val & 0xff; + op[1] = (val >> 8) & 0xff; +#endif + break; + + case BFD_RELOC_RX_NEG24: + val = -val; +#if RX_OPCODE_BIG_ENDIAN + op[2] = val & 0xff; + op[1] = (val >> 8) & 0xff; + op[0] = (val >> 16) & 0xff; +#else + op[0] = val & 0xff; + op[1] = (val >> 8) & 0xff; + op[2] = (val >> 16) & 0xff; +#endif + break; + + case BFD_RELOC_RX_NEG32: + val = -val; +#if RX_OPCODE_BIG_ENDIAN + op[3] = val & 0xff; + op[2] = (val >> 8) & 0xff; + op[1] = (val >> 16) & 0xff; + op[0] = (val >> 24) & 0xff; +#else + op[0] = val & 0xff; + op[1] = (val >> 8) & 0xff; + op[2] = (val >> 16) & 0xff; + op[3] = (val >> 24) & 0xff; +#endif + break; + + case BFD_RELOC_RX_GPRELL: + val >>= 1; + case BFD_RELOC_RX_GPRELW: + val >>= 1; + case BFD_RELOC_RX_GPRELB: +#if RX_OPCODE_BIG_ENDIAN + op[1] = val & 0xff; + op[0] = (val >> 8) & 0xff; +#else + op[0] = val & 0xff; + op[1] = (val >> 8) & 0xff; +#endif + break; + + default: + as_bad (_("Unknown reloc in md_apply_fix: %s"), + bfd_get_reloc_code_name (f->fx_r_type)); + break; + } + + if (f->fx_addsy == NULL) + f->fx_done = 1; +} + +arelent ** +tc_gen_reloc (asection * seg ATTRIBUTE_UNUSED, fixS * fixp) +{ + static arelent * reloc[5]; + + if (fixp->fx_r_type == BFD_RELOC_NONE) + { + reloc[0] = NULL; + return reloc; + } + + if (fixp->fx_subsy + && S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) + { + fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy); + fixp->fx_subsy = NULL; + } + + reloc[0] = (arelent *) xmalloc (sizeof (arelent)); + reloc[0]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); + * reloc[0]->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); + reloc[0]->address = fixp->fx_frag->fr_address + fixp->fx_where; + reloc[0]->addend = fixp->fx_offset; + + /* Certain BFD relocations cannot be translated directly into + a single (non-Red Hat) RX relocation, but instead need + multiple RX relocations - handle them here. */ + switch (fixp->fx_r_type) + { + case BFD_RELOC_RX_DIFF: + reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_SYM); + + reloc[1] = (arelent *) xmalloc (sizeof (arelent)); + reloc[1]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); + * reloc[1]->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_subsy); + reloc[1]->address = fixp->fx_frag->fr_address + fixp->fx_where; + reloc[1]->addend = 0; + reloc[1]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_SYM); + + reloc[2] = (arelent *) xmalloc (sizeof (arelent)); + reloc[2]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_OP_SUBTRACT); + reloc[2]->addend = 0; + reloc[2]->sym_ptr_ptr = reloc[1]->sym_ptr_ptr; + reloc[2]->address = fixp->fx_frag->fr_address + fixp->fx_where; + + reloc[3] = (arelent *) xmalloc (sizeof (arelent)); + switch (fixp->fx_size) + { + case 1: + reloc[3]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_ABS8); + break; + case 2: + reloc[3]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_ABS16); + break; + case 4: + reloc[3]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_ABS32); + break; + } + reloc[3]->addend = 0; + reloc[3]->sym_ptr_ptr = reloc[1]->sym_ptr_ptr; + reloc[3]->address = fixp->fx_frag->fr_address + fixp->fx_where; + + reloc[4] = NULL; + break; + + case BFD_RELOC_RX_GPRELL: + reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_SYM); + + reloc[1] = (arelent *) xmalloc (sizeof (arelent)); + reloc[1]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); + if (gp_symbol == NULL) + { + if (symbol_table_frozen) + { + symbolS * gp; + + gp = symbol_find ("__gp"); + if (gp == NULL) + as_bad (("unable to create __gp symbol: please re-assemble with the -msmall-data-limit option specified")); + else + gp_symbol = symbol_get_bfdsym (gp); + } + else + gp_symbol = symbol_get_bfdsym (symbol_find_or_make ("__gp")); + } + * reloc[1]->sym_ptr_ptr = gp_symbol; + reloc[1]->address = fixp->fx_frag->fr_address + fixp->fx_where; + reloc[1]->addend = 0; + reloc[1]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_SYM); + + reloc[2] = (arelent *) xmalloc (sizeof (arelent)); + reloc[2]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_OP_SUBTRACT); + reloc[2]->addend = 0; + reloc[2]->sym_ptr_ptr = reloc[1]->sym_ptr_ptr; + reloc[2]->address = fixp->fx_frag->fr_address + fixp->fx_where; + + reloc[3] = (arelent *) xmalloc (sizeof (arelent)); + reloc[3]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_ABS16UL); + reloc[3]->addend = 0; + reloc[3]->sym_ptr_ptr = reloc[1]->sym_ptr_ptr; + reloc[3]->address = fixp->fx_frag->fr_address + fixp->fx_where; + + reloc[4] = NULL; + break; + + case BFD_RELOC_RX_GPRELW: + reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_SYM); + + reloc[1] = (arelent *) xmalloc (sizeof (arelent)); + reloc[1]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); + if (gp_symbol == NULL) + { + if (symbol_table_frozen) + { + symbolS * gp; + + gp = symbol_find ("__gp"); + if (gp == NULL) + as_bad (("unable to create __gp symbol: please re-assemble with the -msmall-data-limit option specified")); + else + gp_symbol = symbol_get_bfdsym (gp); + } + else + gp_symbol = symbol_get_bfdsym (symbol_find_or_make ("__gp")); + } + * reloc[1]->sym_ptr_ptr = gp_symbol; + reloc[1]->address = fixp->fx_frag->fr_address + fixp->fx_where; + reloc[1]->addend = 0; + reloc[1]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_SYM); + + reloc[2] = (arelent *) xmalloc (sizeof (arelent)); + reloc[2]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_OP_SUBTRACT); + reloc[2]->addend = 0; + reloc[2]->sym_ptr_ptr = reloc[1]->sym_ptr_ptr; + reloc[2]->address = fixp->fx_frag->fr_address + fixp->fx_where; + + reloc[3] = (arelent *) xmalloc (sizeof (arelent)); + reloc[3]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_ABS16UW); + reloc[3]->addend = 0; + reloc[3]->sym_ptr_ptr = reloc[1]->sym_ptr_ptr; + reloc[3]->address = fixp->fx_frag->fr_address + fixp->fx_where; + + reloc[4] = NULL; + break; + + case BFD_RELOC_RX_GPRELB: + reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_SYM); + + reloc[1] = (arelent *) xmalloc (sizeof (arelent)); + reloc[1]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); + if (gp_symbol == NULL) + { + if (symbol_table_frozen) + { + symbolS * gp; + + gp = symbol_find ("__gp"); + if (gp == NULL) + as_bad (("unable to create __gp symbol: please re-assemble with the -msmall-data-limit option specified")); + else + gp_symbol = symbol_get_bfdsym (gp); + } + else + gp_symbol = symbol_get_bfdsym (symbol_find_or_make ("__gp")); + } + * reloc[1]->sym_ptr_ptr = gp_symbol; + reloc[1]->address = fixp->fx_frag->fr_address + fixp->fx_where; + reloc[1]->addend = 0; + reloc[1]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_SYM); + + reloc[2] = (arelent *) xmalloc (sizeof (arelent)); + reloc[2]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_OP_SUBTRACT); + reloc[2]->addend = 0; + reloc[2]->sym_ptr_ptr = reloc[1]->sym_ptr_ptr; + reloc[2]->address = fixp->fx_frag->fr_address + fixp->fx_where; + + reloc[3] = (arelent *) xmalloc (sizeof (arelent)); + reloc[3]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RX_ABS16U); + reloc[3]->addend = 0; + reloc[3]->sym_ptr_ptr = reloc[1]->sym_ptr_ptr; + reloc[3]->address = fixp->fx_frag->fr_address + fixp->fx_where; + + reloc[4] = NULL; + break; + + default: + reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); + reloc[1] = NULL; + break; + } + + return reloc; +} + +/* Set the ELF specific flags. */ + +void +rx_elf_final_processing (void) +{ + elf_elfheader (stdoutput)->e_flags |= elf_flags; +} + +/* Scan the current input line for occurances of Renesas + local labels and replace them with the GAS version. */ + +void +rx_start_line (void) +{ + int in_double_quote = 0; + int in_single_quote = 0; + int done = 0; + char * p = input_line_pointer; + + /* Scan the line looking for question marks. Skip past quote enclosed regions. */ + do + { + switch (*p) + { + case '\n': + case 0: + done = 1; + break; + + case '"': + in_double_quote = ! in_double_quote; + break; + + case '\'': + in_single_quote = ! in_single_quote; + break; + + case '?': + if (in_double_quote || in_single_quote) + break; + + if (p[1] == ':') + *p = '1'; + else if (p[1] == '+') + { + p[0] = '1'; + p[1] = 'f'; + } + else if (p[1] == '-') + { + p[0] = '1'; + p[1] = 'b'; + } + break; + + default: + break; + } + + p ++; + } + while (! done); +} |