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- /* tc-sparc.c -- Assemble for the SPARC
- Copyright (C) 1989, 1990, 1991, 1992 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 2, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #define cypress 1234
-
- #include <stdio.h>
- #include <ctype.h>
-
- #include "as.h"
-
- /* careful, this file includes data *declarations* */
- #include "opcode/sparc.h"
-
- void md_begin ();
- void md_end ();
- void md_number_to_chars ();
- void md_assemble ();
- char *md_atof ();
- void md_create_short_jump ();
- void md_create_long_jump ();
- int md_estimate_size_before_relax ();
- void md_ri_to_chars ();
- symbolS *md_undefined_symbol ();
- static void sparc_ip ();
-
- static enum sparc_architecture current_architecture = v6;
- static int architecture_requested;
- static int warn_on_bump;
-
- extern int target_big_endian;
-
- const relax_typeS md_relax_table[1];
-
- /* handle of the OPCODE hash table */
- static struct hash_control *op_hash = NULL;
-
- static void s_seg (), s_proc (), s_data1 (), s_reserve (), s_common ();
- extern void s_globl (), s_long (), s_short (), s_space (), cons ();
- extern void s_align_bytes (), s_ignore ();
-
- /* Ugly hack to keep non-BFD version working. */
- #ifndef BFD_ASSEMBLER
- #define BFD_RELOC_NONE NO_RELOC
- #define BFD_RELOC_32 RELOC_32
- #define BFD_RELOC_HI22 RELOC_HI22
- #define BFD_RELOC_LO10 RELOC_LO10
- #define BFD_RELOC_SPARC_WDISP22 RELOC_WDISP22
- #define BFD_RELOC_32_PCREL_S2 RELOC_WDISP30
- #define BFD_RELOC_SPARC22 RELOC_22
- #define BFD_RELOC_SPARC_BASE13 RELOC_BASE13
- #define BFD_RELOC_SPARC13 RELOC_13
- #define BFD_RELOC_SPARC_BASE22 RELOC_BASE22
- #define subseg_set subseg_new
- #endif
-
- const pseudo_typeS md_pseudo_table[] =
- {
- {"align", s_align_bytes, 0}, /* Defaulting is invalid (0) */
- {"common", s_common, 0},
- {"global", s_globl, 0},
- {"half", cons, 2},
- {"optim", s_ignore, 0},
- {"proc", s_proc, 0},
- {"reserve", s_reserve, 0},
- {"seg", s_seg, 0},
- {"skip", s_space, 0},
- {"word", cons, 4},
- {NULL, 0, 0},
- };
-
- const int md_short_jump_size = 4;
- const int md_long_jump_size = 4;
- const int md_reloc_size = 12; /* Size of relocation record */
-
- /* This array holds the chars that always start a comment. If the
- pre-processor is disabled, these aren't very useful */
- const char comment_chars[] = "!"; /* JF removed '|' from comment_chars */
-
- /* This array holds the chars that only start a comment at the beginning of
- a line. If the line seems to have the form '# 123 filename'
- .line and .file directives will appear in the pre-processed output */
- /* 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. */
- /* Also note that comments started like this one will always
- work if '/' isn't otherwise defined. */
- const char line_comment_chars[] = "#";
-
- const char line_separator_chars[] = "";
-
- /* Chars that can be used to separate mant from exp in floating point nums */
- const char EXP_CHARS[] = "eE";
-
- /* Chars that mean this number is a floating point constant */
- /* As in 0f12.456 */
- /* or 0d1.2345e12 */
- const char FLT_CHARS[] = "rRsSfFdDxXpP";
-
- /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be
- changed in read.c . Ideally it shouldn't have to know about it at all,
- but nothing is ideal around here.
- */
-
- static unsigned char octal[256];
- #define isoctal(c) octal[c]
- static unsigned char toHex[256];
-
- struct sparc_it
- {
- char *error;
- unsigned long opcode;
- struct nlist *nlistp;
- expressionS exp;
- int pcrel;
- #ifdef BFD_ASSEMBLER
- bfd_reloc_code_real_type reloc;
- #else
- enum reloc_type reloc;
- #endif
- };
-
- struct sparc_it the_insn, set_insn;
-
- #if 0
- static void print_insn PARAMS ((struct sparc_it *insn));
- #endif
- static int getExpression PARAMS ((char *str));
-
- static char *expr_end;
- static int special_case;
-
- /*
- * Instructions that require wierd handling because they're longer than
- * 4 bytes.
- */
- #define SPECIAL_CASE_SET 1
- #define SPECIAL_CASE_FDIV 2
-
- /*
- * sort of like s_lcomm
- *
- */
- static int max_alignment = 15;
-
- static void
- s_reserve ()
- {
- #ifndef OBJ_AOUT
- as_fatal ("s_reserve only defined for a.out");
- #else
- char *name;
- char *p;
- char c;
- int align;
- int size;
- int temp;
- symbolS *symbolP;
-
- name = input_line_pointer;
- c = get_symbol_end ();
- p = input_line_pointer;
- *p = c;
- SKIP_WHITESPACE ();
-
- if (*input_line_pointer != ',')
- {
- as_bad ("Expected comma after name");
- ignore_rest_of_line ();
- return;
- }
-
- ++input_line_pointer;
-
- if ((size = get_absolute_expression ()) < 0)
- {
- as_bad ("BSS length (%d.) <0! Ignored.", size);
- ignore_rest_of_line ();
- return;
- } /* bad length */
-
- *p = 0;
- symbolP = symbol_find_or_make (name);
- *p = c;
-
- if (strncmp (input_line_pointer, ",\"bss\"", 6) != 0)
- {
- as_bad ("bad .reserve segment: `%s'", input_line_pointer);
- return;
- } /* if not bss */
-
- input_line_pointer += 6;
- SKIP_WHITESPACE ();
-
- if (*input_line_pointer == ',')
- {
- ++input_line_pointer;
-
- SKIP_WHITESPACE ();
- if (*input_line_pointer == '\n')
- {
- as_bad ("Missing alignment");
- return;
- }
-
- align = get_absolute_expression ();
- if (align > max_alignment)
- {
- align = max_alignment;
- as_warn ("Alignment too large: %d. assumed.", align);
- }
- else if (align < 0)
- {
- align = 0;
- as_warn ("Alignment negative. 0 assumed.");
- }
-
- record_alignment (bss_section, align);
-
- /* convert to a power of 2 alignment */
- for (temp = 0; (align & 1) == 0; align >>= 1, ++temp);;
-
- if (align != 1)
- {
- as_bad ("Alignment not a power of 2");
- ignore_rest_of_line ();
- return;
- } /* not a power of two */
-
- align = temp;
- } /* if has optional alignment */
- else
- align = 0;
-
- if (S_GET_OTHER (symbolP) == 0
- && S_GET_DESC (symbolP) == 0
- && (S_GET_SEGMENT (symbolP) == bss_section
- || !S_IS_DEFINED (symbolP)))
- {
- if (! need_pass_2)
- {
- char *p;
- segT current_seg = now_seg;
- subsegT current_subseg = now_subseg;
-
- subseg_set (bss_section, 1); /* switch to bss */
-
- if (align)
- frag_align (align, 0); /* do alignment */
-
- /* detach from old frag */
- if (S_GET_SEGMENT(symbolP) == bss_section)
- symbolP->sy_frag->fr_symbol = NULL;
-
- symbolP->sy_frag = frag_now;
- p = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP,
- size, (char *)0);
- *p = 0;
-
- S_SET_SEGMENT (symbolP, bss_section);
-
- subseg_set (current_seg, current_subseg);
- }
- }
- else
- {
- as_warn("Ignoring attempt to re-define symbol %s.", name);
- } /* if not redefining */
-
- demand_empty_rest_of_line ();
- #endif
- }
-
- static void
- s_common ()
- {
- register char *name;
- register char c;
- register char *p;
- register int temp;
- register symbolS *symbolP;
-
- 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");
- ignore_rest_of_line ();
- return;
- }
- input_line_pointer++; /* skip ',' */
- if ((temp = get_absolute_expression ()) < 0)
- {
- as_bad (".COMMon length (%d.) <0! Ignored.", temp);
- ignore_rest_of_line ();
- return;
- }
- *p = 0;
- symbolP = symbol_find_or_make (name);
- *p = c;
- if (S_IS_DEFINED (symbolP))
- {
- as_bad ("Ignoring attempt to re-define symbol");
- ignore_rest_of_line ();
- return;
- }
- if (S_GET_VALUE (symbolP) != 0)
- {
- if (S_GET_VALUE (symbolP) != temp)
- {
- as_warn ("Length of .comm \"%s\" is already %d. Not changed to %d.",
- S_GET_NAME (symbolP), S_GET_VALUE (symbolP), temp);
- }
- }
- else
- {
- S_SET_VALUE (symbolP, temp);
- S_SET_EXTERNAL (symbolP);
- #ifdef OBJ_ELF
- /* But not for a.out ... find some sensible way to characterize
- this. */
- S_SET_SEGMENT (symbolP, now_seg);
- #endif
- }
- know (symbolP->sy_frag == &zero_address_frag);
- #ifdef OBJ_ELF
- if (*input_line_pointer != ',')
- {
- as_bad ("Expected command (and alignment) after common length");
- ignore_rest_of_line ();
- return;
- }
- input_line_pointer++;
- temp = get_absolute_expression ();
- if (temp > max_alignment)
- {
- temp = max_alignment;
- as_warn ("Common alignment too large: %d. assumed", temp);
- }
- else if (temp < 0)
- {
- temp = 0;
- as_warn ("Common alignment negative; 0 assumed");
- }
- record_alignment (S_GET_SEGMENT (symbolP), temp);
- #else
- if (strncmp (input_line_pointer, ",\"bss\"", 6) != 0
- && strncmp (input_line_pointer, ",\"data\"", 7) != 0)
- {
- p = input_line_pointer;
- while (*p && *p != '\n')
- p++;
- c = *p;
- *p = '\0';
- as_bad ("bad .common segment: `%s'", input_line_pointer);
- *p = c;
- return;
- }
- input_line_pointer += 6 + (input_line_pointer[2] == 'd'); /* Skip either */
- #endif
- demand_empty_rest_of_line ();
- return;
- } /* s_common() */
-
- static void
- s_seg ()
- {
-
- if (strncmp (input_line_pointer, "\"text\"", 6) == 0)
- {
- input_line_pointer += 6;
- s_text ();
- return;
- }
- if (strncmp (input_line_pointer, "\"data\"", 6) == 0)
- {
- input_line_pointer += 6;
- s_data ();
- return;
- }
- if (strncmp (input_line_pointer, "\"data1\"", 7) == 0)
- {
- input_line_pointer += 7;
- s_data1 ();
- return;
- }
- if (strncmp (input_line_pointer, "\"bss\"", 5) == 0)
- {
- input_line_pointer += 5;
- /* We only support 2 segments -- text and data -- for now, so
- things in the "bss segment" will have to go into data for now.
- You can still allocate SEG_BSS stuff with .lcomm or .reserve. */
- subseg_set (data_section, 255); /* FIXME-SOMEDAY */
- return;
- }
- as_bad ("Unknown segment type");
- demand_empty_rest_of_line ();
- return;
- } /* s_seg() */
-
- static void
- s_data1 ()
- {
- subseg_set (data_section, 1);
- demand_empty_rest_of_line ();
- return;
- } /* s_data1() */
-
- static void
- s_proc ()
- {
- extern char is_end_of_line[];
-
- while (!is_end_of_line[*input_line_pointer])
- {
- ++input_line_pointer;
- }
- ++input_line_pointer;
- return;
- } /* s_proc() */
-
-
- /* This function is called once, at assembler startup time. It should
- set up all the tables, etc. that the MD part of the assembler will need. */
- void
- md_begin ()
- {
- register char *retval = NULL;
- int lose = 0;
- register unsigned int i = 0;
-
- op_hash = hash_new ();
- if (op_hash == NULL)
- as_fatal ("Virtual memory exhausted");
-
- while (i < NUMOPCODES)
- {
- const char *name = sparc_opcodes[i].name;
- retval = hash_insert (op_hash, name, &sparc_opcodes[i]);
- if (retval != NULL && *retval != '\0')
- {
- fprintf (stderr, "internal error: can't hash `%s': %s\n",
- sparc_opcodes[i].name, retval);
- lose = 1;
- }
- do
- {
- if (sparc_opcodes[i].match & sparc_opcodes[i].lose)
- {
- fprintf (stderr, "internal error: losing opcode: `%s' \"%s\"\n",
- sparc_opcodes[i].name, sparc_opcodes[i].args);
- lose = 1;
- }
- ++i;
- }
- while (i < NUMOPCODES
- && !strcmp (sparc_opcodes[i].name, name));
- }
-
- if (lose)
- as_fatal ("Broken assembler. No assembly attempted.");
-
- for (i = '0'; i < '8'; ++i)
- octal[i] = 1;
- for (i = '0'; i <= '9'; ++i)
- toHex[i] = i - '0';
- for (i = 'a'; i <= 'f'; ++i)
- toHex[i] = i + 10 - 'a';
- for (i = 'A'; i <= 'F'; ++i)
- toHex[i] = i + 10 - 'A';
-
-
- target_big_endian = 1;
- } /* md_begin() */
-
- void
- md_end ()
- {
- return;
- } /* md_end() */
-
- void
- md_assemble (str)
- char *str;
- {
- char *toP;
- int rsd;
-
- know (str);
- sparc_ip (str);
-
- /* See if "set" operand is absolute and small; skip sethi if so. */
- if (special_case == SPECIAL_CASE_SET
- && the_insn.exp.X_seg == absolute_section)
- {
- if (the_insn.exp.X_add_number >= -(1 << 12)
- && the_insn.exp.X_add_number < (1 << 12))
- {
- the_insn.opcode = 0x80102000 /* or %g0,imm,... */
- | (the_insn.opcode & 0x3E000000) /* dest reg */
- | (the_insn.exp.X_add_number & 0x1FFF); /* imm */
- special_case = 0; /* No longer special */
- the_insn.reloc = BFD_RELOC_NONE; /* No longer relocated */
- }
- }
-
- toP = frag_more (4);
- /* put out the opcode */
- md_number_to_chars (toP, the_insn.opcode, 4);
-
- /* put out the symbol-dependent stuff */
- if (the_insn.reloc != BFD_RELOC_NONE)
- {
- fix_new (frag_now, /* which frag */
- (toP - frag_now->fr_literal), /* where */
- 4, /* size */
- the_insn.exp.X_add_symbol,
- the_insn.exp.X_subtract_symbol,
- the_insn.exp.X_add_number,
- the_insn.pcrel,
- the_insn.reloc);
- }
-
- switch (special_case)
- {
- case SPECIAL_CASE_SET:
- special_case = 0;
- assert (the_insn.reloc == BFD_RELOC_HI22);
- /* See if "set" operand has no low-order bits; skip OR if so. */
- if (the_insn.exp.X_seg == absolute_section
- && ((the_insn.exp.X_add_number & 0x3FF) == 0))
- return;
- toP = frag_more (4);
- rsd = (the_insn.opcode >> 25) & 0x1f;
- the_insn.opcode = 0x80102000 | (rsd << 25) | (rsd << 14);
- md_number_to_chars (toP, the_insn.opcode, 4);
- fix_new (frag_now, /* which frag */
- (toP - frag_now->fr_literal), /* where */
- 4, /* size */
- the_insn.exp.X_add_symbol,
- the_insn.exp.X_subtract_symbol,
- the_insn.exp.X_add_number,
- the_insn.pcrel,
- BFD_RELOC_LO10
- );
- return;
-
- case SPECIAL_CASE_FDIV:
- /* According to information leaked from Sun, the "fdiv" instructions
- on early SPARC machines would produce incorrect results sometimes.
- The workaround is to add an fmovs of the destination register to
- itself just after the instruction. This was true on machines
- with Weitek 1165 float chips, such as the Sun-4/260 and /280. */
- special_case = 0;
- assert (the_insn.reloc == BFD_RELOC_NONE);
- toP = frag_more (4);
- rsd = (the_insn.opcode >> 25) & 0x1f;
- the_insn.opcode = 0x81A00020 | (rsd << 25) | rsd; /* fmovs dest,dest */
- md_number_to_chars (toP, the_insn.opcode, 4);
- return;
-
- case 0:
- return;
-
- default:
- as_fatal ("failed sanity check.");
- }
- } /* md_assemble() */
-
- static void
- sparc_ip (str)
- char *str;
- {
- char *error_message = "";
- char *s;
- const char *args;
- char c;
- struct sparc_opcode *insn;
- char *argsStart;
- unsigned long opcode;
- unsigned int mask = 0;
- int match = 0;
- int comma = 0;
- long immediate_max = 0;
-
- for (s = str; islower (*s) || (*s >= '0' && *s <= '3'); ++s)
- ;
- switch (*s)
- {
-
- case '\0':
- break;
-
- case ',':
- comma = 1;
-
- /*FALLTHROUGH */
-
- case ' ':
- *s++ = '\0';
- break;
-
- default:
- as_bad ("Unknown opcode: `%s'", str);
- exit (1);
- }
- if ((insn = (struct sparc_opcode *) hash_find (op_hash, str)) == NULL)
- {
- as_bad ("Unknown opcode: `%s'", str);
- return;
- }
- if (comma)
- {
- *--s = ',';
- }
- argsStart = s;
- for (;;)
- {
- opcode = insn->match;
- memset (&the_insn, '\0', sizeof (the_insn));
- the_insn.reloc = BFD_RELOC_NONE;
-
- /*
- * Build the opcode, checking as we go to make
- * sure that the operands match
- */
- for (args = insn->args;; ++args)
- {
- switch (*args)
- {
-
-
- case 'M':
- case 'm':
- if (strncmp (s, "%asr", 4) == 0)
- {
- s += 4;
-
- if (isdigit (*s))
- {
- long num = 0;
-
- while (isdigit (*s))
- {
- num = num * 10 + *s - '0';
- ++s;
- }
-
- if (num < 16 || 31 < num)
- {
- error_message = ": asr number must be between 15 and 31";
- goto error;
- } /* out of range */
-
- opcode |= (*args == 'M' ? RS1 (num) : RD (num));
- continue;
- }
- else
- {
- error_message = ": expecting %asrN";
- goto error;
- } /* if %asr followed by a number. */
-
- } /* if %asr */
- break;
-
-
- case '\0': /* end of args */
- if (*s == '\0')
- {
- match = 1;
- }
- break;
-
- case '+':
- if (*s == '+')
- {
- ++s;
- continue;
- }
- if (*s == '-')
- {
- continue;
- }
- break;
-
- case '[': /* these must match exactly */
- case ']':
- case ',':
- case ' ':
- if (*s++ == *args)
- continue;
- break;
-
- case '#': /* must be at least one digit */
- if (isdigit (*s++))
- {
- while (isdigit (*s))
- {
- ++s;
- }
- continue;
- }
- break;
-
- case 'C': /* coprocessor state register */
- if (strncmp (s, "%csr", 4) == 0)
- {
- s += 4;
- continue;
- }
- break;
-
- case 'b': /* next operand is a coprocessor register */
- case 'c':
- case 'D':
- if (*s++ == '%' && *s++ == 'c' && isdigit (*s))
- {
- mask = *s++;
- if (isdigit (*s))
- {
- mask = 10 * (mask - '0') + (*s++ - '0');
- if (mask >= 32)
- {
- break;
- }
- }
- else
- {
- mask -= '0';
- }
- switch (*args)
- {
-
- case 'b':
- opcode |= mask << 14;
- continue;
-
- case 'c':
- opcode |= mask;
- continue;
-
- case 'D':
- opcode |= mask << 25;
- continue;
- }
- }
- break;
-
- case 'r': /* next operand must be a register */
- case '1':
- case '2':
- case 'd':
- if (*s++ == '%')
- {
- switch (c = *s++)
- {
-
- case 'f': /* frame pointer */
- if (*s++ == 'p')
- {
- mask = 0x1e;
- break;
- }
- goto error;
-
- case 'g': /* global register */
- if (isoctal (c = *s++))
- {
- mask = c - '0';
- break;
- }
- goto error;
-
- case 'i': /* in register */
- if (isoctal (c = *s++))
- {
- mask = c - '0' + 24;
- break;
- }
- goto error;
-
- case 'l': /* local register */
- if (isoctal (c = *s++))
- {
- mask = (c - '0' + 16);
- break;
- }
- goto error;
-
- case 'o': /* out register */
- if (isoctal (c = *s++))
- {
- mask = (c - '0' + 8);
- break;
- }
- goto error;
-
- case 's': /* stack pointer */
- if (*s++ == 'p')
- {
- mask = 0xe;
- break;
- }
- goto error;
-
- case 'r': /* any register */
- if (!isdigit (c = *s++))
- {
- goto error;
- }
- /* FALLTHROUGH */
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- if (isdigit (*s))
- {
- if ((c = 10 * (c - '0') + (*s++ - '0')) >= 32)
- {
- goto error;
- }
- }
- else
- {
- c -= '0';
- }
- mask = c;
- break;
-
- default:
- goto error;
- }
- /*
- * Got the register, now figure out where
- * it goes in the opcode.
- */
- switch (*args)
- {
-
- case '1':
- opcode |= mask << 14;
- continue;
-
- case '2':
- opcode |= mask;
- continue;
-
- case 'd':
- opcode |= mask << 25;
- continue;
-
- case 'r':
- opcode |= (mask << 25) | (mask << 14);
- continue;
- }
- }
- break;
-
- case 'e': /* next operand is a floating point register */
- case 'v':
- case 'V':
-
- case 'f':
- case 'B':
- case 'R':
-
- case 'g':
- case 'H':
- case 'J':
- {
- char format;
-
- if (*s++ == '%'
-
- && ((format = *s) == 'f')
-
- && isdigit (*++s))
- {
-
-
-
- for (mask = 0; isdigit (*s); ++s)
- {
- mask = 10 * mask + (*s - '0');
- } /* read the number */
-
- if ((*args == 'v'
- || *args == 'B'
- || *args == 'H')
- && (mask & 1))
- {
- break;
- } /* register must be even numbered */
-
- if ((*args == 'V'
- || *args == 'R'
- || *args == 'J')
- && (mask & 3))
- {
- break;
- } /* register must be multiple of 4 */
-
- if (format == 'f')
- {
- if (mask >= 32)
- {
- error_message = ": There are only 32 f registers; [0-31]";
- goto error;
- } /* on error */
- } /* if not an 'f' register. */
- } /* on error */
-
- switch (*args)
- {
-
- case 'v':
- case 'V':
- case 'e':
- opcode |= RS1 (mask);
- continue;
-
-
- case 'f':
- case 'B':
- case 'R':
- opcode |= RS2 (mask);
- continue;
-
- case 'g':
- case 'H':
- case 'J':
- opcode |= RD (mask);
- continue;
- } /* pack it in. */
-
- know (0);
- break;
- } /* float arg */
-
- case 'F':
- if (strncmp (s, "%fsr", 4) == 0)
- {
- s += 4;
- continue;
- }
- break;
-
- case 'h': /* high 22 bits */
- the_insn.reloc = BFD_RELOC_HI22;
- goto immediate;
-
- case 'l': /* 22 bit PC relative immediate */
- the_insn.reloc = BFD_RELOC_SPARC_WDISP22;
- the_insn.pcrel = 1;
- goto immediate;
-
- case 'L': /* 30 bit immediate */
- the_insn.reloc = BFD_RELOC_32_PCREL_S2;
- the_insn.pcrel = 1;
- goto immediate;
-
- case 'n': /* 22 bit immediate */
- the_insn.reloc = BFD_RELOC_SPARC22;
- goto immediate;
-
- case 'i': /* 13 bit immediate */
- /* What's the difference between base13 and 13? */
- the_insn.reloc = BFD_RELOC_SPARC_BASE13;
- immediate_max = 0x0FFF;
-
- /*FALLTHROUGH */
-
- immediate:
- if (*s == ' ')
- s++;
- if (*s == '%')
- {
- if ((c = s[1]) == 'h' && s[2] == 'i')
- {
- the_insn.reloc = BFD_RELOC_HI22;
- s += 3;
- }
- else if (c == 'l' && s[2] == 'o')
- {
- the_insn.reloc = BFD_RELOC_LO10;
- s += 3;
- }
- else
- break;
- }
- /* Note that if the getExpression() fails, we
- will still have created U entries in the
- symbol table for the 'symbols' in the input
- string. Try not to create U symbols for
- registers, etc. */
- {
- /* This stuff checks to see if the
- expression ends in +%reg If it does,
- it removes the register from the
- expression, and re-sets 's' to point
- to the right place */
-
- char *s1;
-
- for (s1 = s; *s1 && *s1 != ',' && *s1 != ']'; s1++);;
-
- if (s1 != s && isdigit (s1[-1]))
- {
- if (s1[-2] == '%' && s1[-3] == '+')
- {
- s1 -= 3;
- *s1 = '\0';
- (void) getExpression (s);
- *s1 = '+';
- s = s1;
- continue;
- }
- else if (strchr ("goli0123456789", s1[-2]) && s1[-3] == '%' && s1[-4] == '+')
- {
- s1 -= 4;
- *s1 = '\0';
- (void) getExpression (s);
- *s1 = '+';
- s = s1;
- continue;
- }
- }
- }
- (void) getExpression (s);
- s = expr_end;
-
- /* Check for invalid constant values. Don't
- warn if constant was inside %hi or %lo,
- since these truncate the constant to
- fit. */
- if (immediate_max != 0
- && the_insn.reloc != BFD_RELOC_LO10
- && the_insn.reloc != BFD_RELOC_HI22
- && the_insn.exp.X_add_symbol == 0
- && the_insn.exp.X_subtract_symbol == 0
- && the_insn.exp.X_seg == absolute_section
- && (the_insn.exp.X_add_number > immediate_max
- || the_insn.exp.X_add_number < ~immediate_max))
- as_bad ("constant value must be between %ld and %ld",
- ~immediate_max, immediate_max);
- /* Reset to prevent extraneous range check. */
- immediate_max = 0;
-
- continue;
-
- case 'a':
- if (*s++ == 'a')
- {
- opcode |= ANNUL;
- continue;
- }
- break;
-
- case 'A':
- {
- char *push = input_line_pointer;
- expressionS e;
-
- input_line_pointer = s;
-
- if (expression (&e) == absolute_section)
- {
- opcode |= e.X_add_number << 5;
- s = input_line_pointer;
- input_line_pointer = push;
- continue;
- } /* if absolute */
-
- break;
- } /* alternate space */
-
- case 'p':
- if (strncmp (s, "%psr", 4) == 0)
- {
- s += 4;
- continue;
- }
- break;
-
- case 'q': /* floating point queue */
- if (strncmp (s, "%fq", 3) == 0)
- {
- s += 3;
- continue;
- }
- break;
-
- case 'Q': /* coprocessor queue */
- if (strncmp (s, "%cq", 3) == 0)
- {
- s += 3;
- continue;
- }
- break;
-
- case 'S':
- if (strcmp (str, "set") == 0)
- {
- special_case = SPECIAL_CASE_SET;
- continue;
- }
- else if (strncmp (str, "fdiv", 4) == 0)
- {
- special_case = SPECIAL_CASE_FDIV;
- continue;
- }
- break;
-
-
- case 't':
- if (strncmp (s, "%tbr", 4) != 0)
- break;
- s += 4;
- continue;
-
- case 'w':
- if (strncmp (s, "%wim", 4) != 0)
- break;
- s += 4;
- continue;
-
- case 'y':
- if (strncmp (s, "%y", 2) != 0)
- break;
- s += 2;
- continue;
-
- default:
- as_fatal ("failed sanity check.");
- } /* switch on arg code */
- break;
- } /* for each arg that we expect */
- error:
- if (match == 0)
- {
- /* Args don't match. */
- if (((unsigned) (&insn[1] - sparc_opcodes)) < NUMOPCODES
- && !strcmp (insn->name, insn[1].name))
- {
- ++insn;
- s = argsStart;
- continue;
- }
- else
- {
- as_bad ("Illegal operands%s", error_message);
- return;
- }
- }
- else
- {
- if (insn->architecture > current_architecture)
- {
- if ((!architecture_requested || warn_on_bump)
- &&
- 1
- )
- {
- if (warn_on_bump)
- {
- as_warn ("architecture bumped from \"%s\" to \"%s\" on \"%s\"",
- architecture_pname[current_architecture],
- architecture_pname[insn->architecture],
- str);
- } /* if warning */
-
- current_architecture = insn->architecture;
- }
- else
- {
- as_bad ("architecture mismatch on \"%s\" (\"%s\"). current architecture is \"%s\"",
- str,
- architecture_pname[insn->architecture],
- architecture_pname[current_architecture]);
- return;
- } /* if bump ok else error */
- } /* if architecture higher */
- } /* if no match */
-
- break;
- } /* forever looking for a match */
-
- the_insn.opcode = opcode;
- return;
- } /* sparc_ip() */
-
- static int
- getExpression (str)
- char *str;
- {
- char *save_in;
- segT seg;
-
- save_in = input_line_pointer;
- input_line_pointer = str;
- seg = expression (&the_insn.exp);
- if (seg == absolute_section
- || seg == text_section
- || seg == data_section
- || seg == bss_section
- || seg == undefined_section
- || seg == diff_section
- || seg == big_section
- || seg == absent_section)
- /* ok */;
- else
- {
- the_insn.error = "bad segment";
- expr_end = input_line_pointer;
- input_line_pointer = save_in;
- return 1;
- }
- expr_end = input_line_pointer;
- input_line_pointer = save_in;
- return 0;
- } /* getExpression() */
-
-
- /*
- This is identical to the md_atof in m68k.c. I think this is right,
- but I'm not sure.
-
- Turn a string in input_line_pointer into a floating point constant of type
- type, and store the appropriate bytes in *litP. The number of LITTLENUMS
- emitted is stored in *sizeP . An error message is returned, or NULL on OK.
- */
-
- /* Equal to MAX_PRECISION in atof-ieee.c */
- #define MAX_LITTLENUMS 6
-
- char *
- md_atof (type, litP, sizeP)
- char type;
- char *litP;
- int *sizeP;
- {
- int prec;
- LITTLENUM_TYPE words[MAX_LITTLENUMS];
- LITTLENUM_TYPE *wordP;
- char *t;
- char *atof_ieee ();
-
- switch (type)
- {
-
- case 'f':
- case 'F':
- case 's':
- case 'S':
- prec = 2;
- break;
-
- case 'd':
- case 'D':
- case 'r':
- case 'R':
- prec = 4;
- break;
-
- case 'x':
- case 'X':
- prec = 6;
- break;
-
- case 'p':
- case 'P':
- prec = 6;
- break;
-
- default:
- *sizeP = 0;
- return "Bad call to MD_ATOF()";
- }
- t = atof_ieee (input_line_pointer, type, words);
- if (t)
- input_line_pointer = t;
- *sizeP = prec * sizeof (LITTLENUM_TYPE);
- for (wordP = words; prec--;)
- {
- md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
- litP += sizeof (LITTLENUM_TYPE);
- }
- return 0;
- }
-
- /*
- * Write out big-endian.
- */
- void
- md_number_to_chars (buf, val, n)
- char *buf;
- long val;
- int n;
- {
-
- switch (n)
- {
-
- case 4:
- *buf++ = val >> 24;
- *buf++ = val >> 16;
- case 2:
- *buf++ = val >> 8;
- case 1:
- *buf = val;
- break;
-
- default:
- as_fatal ("failed sanity check.");
- }
- return;
- } /* md_number_to_chars() */
-
- /* Apply a fixS to the frags, now that we know the value it ought to
- hold. */
-
- #ifdef BFD_ASSEMBLER
- int
- #else
- void
- #endif
- md_apply_fix (fixP, value)
- fixS *fixP;
- #ifdef BFD_ASSEMBLER
- long *value;
- #else
- long value;
- #endif
- {
- char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
- long val;
-
- #ifdef BFD_ASSEMBLER
- val = *value;
- #else
- val = value;
- #endif
-
- assert (fixP->fx_size == 4);
- #ifdef BFD_ASSEMBLER
- assert (fixP->fx_r_type < BFD_RELOC_UNUSED);
- #else
- assert (fixP->fx_r_type < NO_RELOC);
- #endif
-
- fixP->fx_addnumber = val; /* Remember value for emit_reloc */
-
- /*
- * This is a hack. There should be a better way to
- * handle this.
- */
- if (fixP->fx_r_type == BFD_RELOC_32_PCREL_S2 && fixP->fx_addsy)
- {
- val += fixP->fx_where + fixP->fx_frag->fr_address;
- }
-
- switch (fixP->fx_r_type)
- {
-
- case BFD_RELOC_32:
- buf[0] = 0; /* val >> 24; */
- buf[1] = 0; /* val >> 16; */
- buf[2] = 0; /* val >> 8; */
- buf[3] = 0; /* val; */
- break;
-
- case BFD_RELOC_32_PCREL_S2:
- val = (val >>= 2) + 1;
- buf[0] |= (val >> 24) & 0x3f;
- buf[1] = (val >> 16);
- buf[2] = val >> 8;
- buf[3] = val;
- break;
-
-
- case BFD_RELOC_HI22:
- if (!fixP->fx_addsy)
- {
- buf[1] |= (val >> 26) & 0x3f;
- buf[2] = val >> 18;
- buf[3] = val >> 10;
- }
- else
- {
- buf[2] = 0;
- buf[3] = 0;
- }
- break;
-
- case BFD_RELOC_SPARC22:
- if (val & ~0x003fffff)
- {
- as_bad ("relocation overflow");
- } /* on overflow */
- buf[1] |= (val >> 16) & 0x3f;
- buf[2] = val >> 8;
- buf[3] = val & 0xff;
- break;
-
- case BFD_RELOC_SPARC13:
- if (val & ~0x00001fff)
- {
- as_bad ("relocation overflow");
- } /* on overflow */
- buf[2] |= (val >> 8) & 0x1f;
- buf[3] = val & 0xff;
- break;
-
-
- case BFD_RELOC_LO10:
- if (!fixP->fx_addsy)
- {
- buf[2] |= (val >> 8) & 0x03;
- buf[3] = val;
- }
- else
- buf[3] = 0;
- break;
- case BFD_RELOC_SPARC_BASE13:
- if (((val > 0) && (val & ~0x00001fff))
- || ((val < 0) && (~(val - 1) & ~0x00001fff)))
- {
- as_bad ("relocation overflow");
- } /* on overflow */
- buf[2] |= (val >> 8) & 0x1f;
- buf[3] = val;
- break;
-
- case BFD_RELOC_SPARC_WDISP22:
- val = (val >>= 2) + 1;
- /* FALLTHROUGH */
- case BFD_RELOC_SPARC_BASE22:
- buf[1] |= (val >> 16) & 0x3f;
- buf[2] = val >> 8;
- buf[3] = val;
- break;
-
- case BFD_RELOC_NONE:
- default:
- as_bad ("bad or unhandled relocation type: 0x%02x", fixP->fx_r_type);
- break;
- }
-
- #ifdef BFD_ASSEMBLER
- return 1;
- #endif
- }
-
- /* should never be called for sparc */
- void
- md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol)
- char *ptr;
- long from_addr;
- long to_addr;
- fragS *frag;
- symbolS *to_symbol;
- {
- as_fatal ("sparc_create_short_jmp\n");
- }
-
- #ifdef BFD_ASSEMBLER
-
- /* Translate internal representation of relocation info to BFD target
- format. */
- arelent *
- tc_gen_reloc (section, fixp)
- asection *section;
- fixS *fixp;
- {
- arelent *reloc;
- bfd_reloc_code_real_type code;
-
- reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent));
- assert (reloc != 0);
-
- reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
- reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
- if (fixp->fx_pcrel == 0)
- reloc->addend = fixp->fx_addnumber;
- else
- switch (OUTPUT_FLAVOR)
- {
- case bfd_target_elf_flavour:
- reloc->addend = 0;
- break;
- case bfd_target_aout_flavour:
- reloc->addend = - reloc->address;
- break;
- default:
- /* What's a good default here? Is there any?? */
- abort ();
- }
-
- switch (fixp->fx_r_type)
- {
- case BFD_RELOC_32:
- case BFD_RELOC_HI22:
- case BFD_RELOC_LO10:
- case BFD_RELOC_32_PCREL_S2:
- case BFD_RELOC_SPARC_BASE13:
- code = fixp->fx_r_type;
- break;
- default:
- abort ();
- }
- reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
- assert (reloc->howto != 0);
-
- return reloc;
- }
-
- #else
-
- /* Translate internal representation of relocation info to target format.
-
- On sparc: first 4 bytes are normal unsigned long address, next three
- bytes are index, most sig. byte first. Byte 7 is broken up with
- bit 7 as external, bits 6 & 5 unused, and the lower
- five bits as relocation type. Next 4 bytes are long addend. */
- /* Thanx and a tip of the hat to Michael Bloom, mb@ttidca.tti.com */
- void
- tc_aout_fix_to_chars (where, fixP, segment_address_in_file)
- char *where;
- fixS *fixP;
- relax_addressT segment_address_in_file;
- {
- long r_index;
- long r_extern;
- long r_addend = 0;
- long r_address;
-
- know (fixP->fx_addsy);
-
- if (!S_IS_DEFINED (fixP->fx_addsy))
- {
- r_extern = 1;
- r_index = fixP->fx_addsy->sy_number;
- }
- else
- {
- r_extern = 0;
- r_index = S_GET_TYPE (fixP->fx_addsy);
- }
-
- /* this is easy */
- md_number_to_chars (where,
- r_address = fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file,
- 4);
-
- /* now the fun stuff */
- where[4] = (r_index >> 16) & 0x0ff;
- where[5] = (r_index >> 8) & 0x0ff;
- where[6] = r_index & 0x0ff;
- where[7] = ((r_extern << 7) & 0x80) | (0 & 0x60) | (fixP->fx_r_type & 0x1F);
-
- /* Also easy */
- if (fixP->fx_addsy->sy_frag)
- {
- r_addend = fixP->fx_addsy->sy_frag->fr_address;
- }
-
- if (fixP->fx_pcrel)
- {
- r_addend += fixP->fx_offset - r_address;
- }
- else
- {
- r_addend = fixP->fx_addnumber;
- }
-
- md_number_to_chars (&where[8], r_addend, 4);
-
- return;
- } /* tc_aout_fix_to_chars() */
- #endif
-
- /* should never be called for sparc */
- void
- md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol)
- char *ptr;
- long from_addr, to_addr;
- fragS *frag;
- symbolS *to_symbol;
- {
- as_fatal ("sparc_create_long_jump\n");
- } /* md_create_long_jump() */
-
- /* should never be called for sparc */
- int
- md_estimate_size_before_relax (fragP, segtype)
- fragS *fragP;
- segT segtype;
- {
- as_fatal ("sparc_estimate_size_before_relax\n");
- return (1);
- } /* md_estimate_size_before_relax() */
-
- #if 0
- /* for debugging only */
- static void
- print_insn (insn)
- struct sparc_it *insn;
- {
- char *Reloc[] =
- {
- "RELOC_8",
- "RELOC_16",
- "RELOC_32",
- "RELOC_DISP8",
- "RELOC_DISP16",
- "RELOC_DISP32",
- "RELOC_WDISP30",
- "RELOC_WDISP22",
- "RELOC_HI22",
- "RELOC_22",
- "RELOC_13",
- "RELOC_LO10",
- "RELOC_SFA_BASE",
- "RELOC_SFA_OFF13",
- "RELOC_BASE10",
- "RELOC_BASE13",
- "RELOC_BASE22",
- "RELOC_PC10",
- "RELOC_PC22",
- "RELOC_JMP_TBL",
- "RELOC_SEGOFF16",
- "RELOC_GLOB_DAT",
- "RELOC_JMP_SLOT",
- "RELOC_RELATIVE",
- "NO_RELOC"
- };
-
- if (insn->error)
- {
- fprintf (stderr, "ERROR: %s\n");
- }
- fprintf (stderr, "opcode=0x%08x\n", insn->opcode);
- fprintf (stderr, "reloc = %s\n", Reloc[insn->reloc]);
- fprintf (stderr, "exp = {\n");
- fprintf (stderr, "\t\tX_add_symbol = %s\n",
- ((insn->exp.X_add_symbol != NULL)
- ? ((S_GET_NAME (insn->exp.X_add_symbol) != NULL)
- ? S_GET_NAME (insn->exp.X_add_symbol)
- : "???")
- : "0"));
- fprintf (stderr, "\t\tX_sub_symbol = %s\n",
- ((insn->exp.X_subtract_symbol != NULL)
- ? (S_GET_NAME (insn->exp.X_subtract_symbol)
- ? S_GET_NAME (insn->exp.X_subtract_symbol)
- : "???")
- : "0"));
- fprintf (stderr, "\t\tX_add_number = %d\n",
- insn->exp.X_add_number);
- fprintf (stderr, "}\n");
- return;
- } /* print_insn() */
-
- #endif
-
- /*
- * md_parse_option
- * Invocation line includes a switch not recognized by the base assembler.
- * See if it's a processor-specific option. These are:
- *
- * -bump
- * Warn on architecture bumps. See also -A.
- *
- * -Av6, -Av7, -Av8, -Asparclite
- * Select the architecture. Instructions or features not
- * supported by the selected architecture cause fatal errors.
- *
- * The default is to start at v6, and bump the architecture up
- * whenever an instruction is seen at a higher level.
- *
- * If -bump is specified, a warning is printing when bumping to
- * higher levels.
- *
- * If an architecture is specified, all instructions must match
- * that architecture. Any higher level instructions are flagged
- * as errors.
- *
- * if both an architecture and -bump are specified, the
- * architecture starts at the specified level, but bumps are
- * warnings.
- *
- */
-
- int
- md_parse_option (argP, cntP, vecP)
- char **argP;
- int *cntP;
- char ***vecP;
- {
- char *p;
- const char **arch;
-
- if (!strcmp (*argP, "bump"))
- {
- warn_on_bump = 1;
-
- }
- else if (**argP == 'A')
- {
- p = (*argP) + 1;
-
- for (arch = architecture_pname; *arch != NULL; ++arch)
- {
- if (strcmp (p, *arch) == 0)
- {
- break;
- } /* found a match */
- } /* walk the pname table */
-
- if (*arch == NULL)
- {
- as_bad ("unknown architecture: %s", p);
- }
- else
- {
- current_architecture = (enum sparc_architecture) (arch - architecture_pname);
- architecture_requested = 1;
- }
- }
- else
- {
- /* Unknown option */
- (*argP)++;
- return 0;
- }
- **argP = '\0'; /* Done parsing this switch */
- return 1;
- } /* md_parse_option() */
-
- /* We have no need to default values of symbols. */
-
- /* ARGSUSED */
- symbolS *
- md_undefined_symbol (name)
- char *name;
- {
- return 0;
- } /* md_undefined_symbol() */
-
- /* Parse an operand that is machine-specific.
- We just return without modifying the expression if we have nothing
- to do. */
-
- /* ARGSUSED */
- void
- md_operand (expressionP)
- expressionS *expressionP;
- {
- }
-
- /* Round up a section size to the appropriate boundary. */
- long
- md_section_align (segment, size)
- segT segment;
- long size;
- {
- /* Round all sects to multiple of 8 */
- return (size + 7) & ~7;
- }
-
- /* Exactly what point is a PC-relative offset relative TO?
- On the sparc, they're relative to the address of the offset, plus
- its size. This gets us to the following instruction.
- (??? Is this right? FIXME-SOON) */
- long
- md_pcrel_from (fixP)
- fixS *fixP;
- {
- return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address;
- }
-
- #ifndef BFD_ASSEMBLER
- void
- tc_aout_pre_write_hook (headers)
- object_headers *headers;
- {
- H_SET_VERSION (headers, 1);
- }
- #endif
-
- /* end of tc-sparc.c */
-