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- /* tc-sparc.c -- Assemble for the SPARC
- Copyright (C) 1989, 90-95, 1996 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, 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
-
- #include <stdio.h>
- #include <ctype.h>
-
- #include "as.h"
- #include "subsegs.h"
-
- /* careful, this file includes data *declarations* */
- #include "opcode/sparc.h"
-
- static void sparc_ip PARAMS ((char *, const struct sparc_opcode **));
-
- /* Current architecture. We don't bump up unless necessary. */
- static enum sparc_opcode_arch_val current_architecture = SPARC_OPCODE_ARCH_V6;
-
- /* The maximum architecture level we can bump up to.
- In a 32 bit environment, don't allow bumping up to v9 by default.
- The native assembler works this way. The user is required to pass
- an explicit argument before we'll create v9 object files. However, if
- we don't see any v9 insns, a v9 object file is not created. */
- #ifdef SPARC_ARCH64
- static enum sparc_opcode_arch_val max_architecture = SPARC_OPCODE_ARCH_V9;
- #else
- /* ??? This should be V8, but sparclite support was added by making it the
- default. GCC now passes -Asparclite, so maybe sometime in the future
- we can set this to V8. */
- static enum sparc_opcode_arch_val max_architecture = SPARC_OPCODE_ARCH_SPARCLITE;
- #endif
-
- static int architecture_requested;
- static int warn_on_bump;
-
- /* If warn_on_bump and the needed architecture is higher than this
- architecture, issue a warning. */
- static enum sparc_opcode_arch_val warn_after_architecture;
-
- /* Non-zero if we are generating PIC code. */
- int sparc_pic_code;
-
- extern int target_big_endian;
-
- /* handle of the OPCODE hash table */
- static struct hash_control *op_hash;
-
- static void s_data1 PARAMS ((void));
- static void s_seg PARAMS ((int));
- static void s_proc PARAMS ((int));
- static void s_reserve PARAMS ((int));
- static void s_common PARAMS ((int));
- static void s_empty PARAMS ((int));
-
- const pseudo_typeS md_pseudo_table[] =
- {
- {"align", s_align_bytes, 0}, /* Defaulting is invalid (0) */
- {"common", s_common, 0},
- {"empty", s_empty, 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},
- {"xword", cons, 8},
- #ifdef OBJ_ELF
- {"uaxword", cons, 8},
- #endif
- #ifdef OBJ_ELF
- /* these are specific to sparc/svr4 */
- {"pushsection", obj_elf_section, 0},
- {"popsection", obj_elf_previous, 0},
- {"uaword", cons, 4},
- {"uahalf", cons, 2},
- #endif
- {NULL, 0, 0},
- };
-
- 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[(unsigned char) (c)]
- static unsigned char toHex[256];
-
- struct sparc_it
- {
- char *error;
- unsigned long opcode;
- struct nlist *nlistp;
- expressionS exp;
- int pcrel;
- bfd_reloc_code_real_type reloc;
- };
-
- struct sparc_it the_insn, set_insn;
-
- /* Return non-zero if VAL is in the range -(MAX+1) to MAX. */
-
- static INLINE int
- in_signed_range (val, max)
- bfd_signed_vma val, max;
- {
- if (max <= 0)
- abort ();
- if (val > max)
- return 0;
- if (val < ~max)
- return 0;
- return 1;
- }
-
- /* Return non-zero if VAL is in the range -(MAX/2+1) to MAX.
- (e.g. -15 to +31). */
-
- static INLINE int
- in_bitfield_range (val, max)
- bfd_signed_vma val, max;
- {
- if (max <= 0)
- abort ();
- if (val > max)
- return 0;
- if (val < ~(max >> 1))
- return 0;
- return 1;
- }
-
- static int
- sparc_ffs (mask)
- unsigned int mask;
- {
- int i;
-
- if (mask == 0)
- return -1;
-
- for (i = 0; (mask & 1) == 0; ++i)
- mask >>= 1;
- return i;
- }
-
- #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
-
- /* The last instruction to be assembled. */
- static const struct sparc_opcode *last_insn;
-
- /*
- * sort of like s_lcomm
- *
- */
- #ifndef OBJ_ELF
- static int max_alignment = 15;
- #endif
-
- static void
- s_reserve (ignore)
- int ignore;
- {
- 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
- && strncmp (input_line_pointer, ",\".bss\"", 7) != 0)
- {
- as_bad ("bad .reserve segment -- expected BSS segment");
- return;
- }
-
- if (input_line_pointer[2] == '.')
- input_line_pointer += 7;
- else
- 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 ();
- #ifndef OBJ_ELF
- if (align > max_alignment)
- {
- align = max_alignment;
- as_warn ("Alignment too large: %d. assumed.", align);
- }
- #endif
- 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_IS_DEFINED (symbolP)
- #ifdef OBJ_AOUT
- && S_GET_OTHER (symbolP) == 0
- && S_GET_DESC (symbolP) == 0
- #endif
- )
- {
- if (! need_pass_2)
- {
- char *pfrag;
- 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;
- pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP,
- size, (char *)0);
- *pfrag = 0;
-
- S_SET_SEGMENT (symbolP, bss_section);
-
- subseg_set (current_seg, current_subseg);
- }
- }
- else
- {
- as_warn("Ignoring attempt to re-define symbol %s",
- S_GET_NAME (symbolP));
- } /* if not redefining */
-
- demand_empty_rest_of_line ();
- }
-
- static void
- s_common (ignore)
- int ignore;
- {
- char *name;
- char c;
- char *p;
- int temp, size;
- 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;
- }
- size = temp;
- *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) != size)
- {
- as_warn ("Length of .comm \"%s\" is already %ld. Not changed to %d.",
- S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size);
- }
- }
- else
- {
- #ifndef OBJ_ELF
- S_SET_VALUE (symbolP, (valueT) size);
- S_SET_EXTERNAL (symbolP);
- #endif
- }
- know (symbolP->sy_frag == &zero_address_frag);
- if (*input_line_pointer != ',')
- {
- as_bad ("Expected comma after common length");
- ignore_rest_of_line ();
- return;
- }
- input_line_pointer++;
- SKIP_WHITESPACE ();
- if (*input_line_pointer != '"')
- {
- temp = get_absolute_expression ();
- #ifndef OBJ_ELF
- if (temp > max_alignment)
- {
- temp = max_alignment;
- as_warn ("Common alignment too large: %d. assumed", temp);
- }
- #endif
- if (temp < 0)
- {
- temp = 0;
- as_warn ("Common alignment negative; 0 assumed");
- }
- #ifdef OBJ_ELF
- if (symbolP->local)
- {
- segT old_sec;
- int old_subsec;
- char *p;
- int align;
-
- allocate_bss:
- old_sec = now_seg;
- old_subsec = now_subseg;
- align = temp;
- record_alignment (bss_section, align);
- subseg_set (bss_section, 0);
- if (align)
- frag_align (align, 0);
- if (S_GET_SEGMENT (symbolP) == bss_section)
- symbolP->sy_frag->fr_symbol = 0;
- 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);
- S_CLEAR_EXTERNAL (symbolP);
- subseg_set (old_sec, old_subsec);
- }
- else
- #endif
- {
- allocate_common:
- S_SET_VALUE (symbolP, (valueT) size);
- #ifdef OBJ_ELF
- S_SET_ALIGN (symbolP, temp);
- #endif
- S_SET_EXTERNAL (symbolP);
- /* should be common, but this is how gas does it for now */
- S_SET_SEGMENT (symbolP, bfd_und_section_ptr);
- }
- }
- else
- {
- input_line_pointer++;
- /* @@ Some use the dot, some don't. Can we get some consistency?? */
- if (*input_line_pointer == '.')
- input_line_pointer++;
- /* @@ Some say data, some say bss. */
- if (strncmp (input_line_pointer, "bss\"", 4)
- && strncmp (input_line_pointer, "data\"", 5))
- {
- while (*--input_line_pointer != '"')
- ;
- input_line_pointer--;
- goto bad_common_segment;
- }
- while (*input_line_pointer++ != '"')
- ;
- goto allocate_common;
- }
- demand_empty_rest_of_line ();
- return;
-
- {
- bad_common_segment:
- p = input_line_pointer;
- while (*p && *p != '\n')
- p++;
- c = *p;
- *p = '\0';
- as_bad ("bad .common segment %s", input_line_pointer + 1);
- *p = c;
- input_line_pointer = p;
- ignore_rest_of_line ();
- return;
- }
- }
-
- /* Handle the .empty pseudo-op. This supresses the warnings about
- invalid delay slot usage. */
-
- static void
- s_empty (ignore)
- int ignore;
- {
- /* The easy way to implement is to just forget about the last
- instruction. */
- last_insn = NULL;
- }
-
- static void
- s_seg (ignore)
- int ignore;
- {
-
- if (strncmp (input_line_pointer, "\"text\"", 6) == 0)
- {
- input_line_pointer += 6;
- s_text (0);
- return;
- }
- if (strncmp (input_line_pointer, "\"data\"", 6) == 0)
- {
- input_line_pointer += 6;
- s_data (0);
- 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 ();
- }
-
- static void
- s_data1 ()
- {
- subseg_set (data_section, 1);
- demand_empty_rest_of_line ();
- }
-
- static void
- s_proc (ignore)
- int ignore;
- {
- while (!is_end_of_line[(unsigned char) *input_line_pointer])
- {
- ++input_line_pointer;
- }
- ++input_line_pointer;
- }
-
- /* We require .word, et. al., to be aligned correctly. We do it by
- setting up an rs_align_code frag, and checking in HANDLE_ALIGN to
- make sure that no unexpected alignment was introduced. */
-
- void
- sparc_cons_align (nbytes)
- int nbytes;
- {
- int nalign;
- char *p;
-
- nalign = 0;
- while ((nbytes & 1) == 0)
- {
- ++nalign;
- nbytes >>= 1;
- }
-
- if (nalign == 0)
- return;
-
- if (now_seg == absolute_section)
- {
- if ((abs_section_offset & ((1 << nalign) - 1)) != 0)
- as_bad ("misaligned data");
- return;
- }
-
- p = frag_var (rs_align_code, 1, 1, (relax_substateT) 0,
- (symbolS *) NULL, (long) nalign, (char *) NULL);
-
- record_alignment (now_seg, nalign);
- }
-
- /* This is where we do the unexpected alignment check. */
-
- void
- sparc_handle_align (fragp)
- fragS *fragp;
- {
- if (fragp->fr_type == rs_align_code
- && fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix != 0)
- as_bad_where (fragp->fr_file, fragp->fr_line, "misaligned data");
- }
-
- /* sparc64 priviledged registers */
-
- struct priv_reg_entry
- {
- char *name;
- int regnum;
- };
-
- struct priv_reg_entry priv_reg_table[] =
- {
- {"tpc", 0},
- {"tnpc", 1},
- {"tstate", 2},
- {"tt", 3},
- {"tick", 4},
- {"tba", 5},
- {"pstate", 6},
- {"tl", 7},
- {"pil", 8},
- {"cwp", 9},
- {"cansave", 10},
- {"canrestore", 11},
- {"cleanwin", 12},
- {"otherwin", 13},
- {"wstate", 14},
- {"fq", 15},
- {"ver", 31},
- {"", -1}, /* end marker */
- };
-
- static int
- cmp_reg_entry (p, q)
- struct priv_reg_entry *p, *q;
- {
- return strcmp (q->name, p->name);
- }
-
- /* 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 const char *retval = NULL;
- int lose = 0;
- register unsigned int i = 0;
-
- op_hash = hash_new ();
-
- while (i < sparc_num_opcodes)
- {
- const char *name = sparc_opcodes[i].name;
- retval = hash_insert (op_hash, name, &sparc_opcodes[i]);
- if (retval != NULL)
- {
- 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 < sparc_num_opcodes
- && !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';
-
- qsort (priv_reg_table, sizeof (priv_reg_table) / sizeof (priv_reg_table[0]),
- sizeof (priv_reg_table[0]), cmp_reg_entry);
-
- target_big_endian = 1;
-
- /* If -bump, record the architecture level at which we start issuing
- warnings. The behaviour is different depending upon whether an
- architecture was explicitly specified. If it wasn't, we issue warnings
- for all upwards bumps. If it was, we don't start issuing warnings until
- we need to bump beyond the requested architecture or when we bump between
- conflicting architectures. */
-
- if (warn_on_bump
- && architecture_requested)
- {
- /* `max_architecture' records the requested architecture.
- Issue warnings if we go above it. */
- warn_after_architecture = max_architecture;
-
- /* Find the highest architecture level that doesn't conflict with
- the requested one. */
- for (max_architecture = SPARC_OPCODE_ARCH_MAX;
- max_architecture > warn_after_architecture;
- --max_architecture)
- if (! SPARC_OPCODE_CONFLICT_P (max_architecture,
- warn_after_architecture))
- break;
- }
- }
-
- /* Called after all assembly has been done. */
-
- void
- sparc_md_end ()
- {
- #ifdef SPARC_ARCH64
- if (current_architecture == SPARC_OPCODE_ARCH_V9A)
- bfd_set_arch_mach (stdoutput, bfd_arch_sparc, bfd_mach_sparc_v9a);
- else
- bfd_set_arch_mach (stdoutput, bfd_arch_sparc, bfd_mach_sparc_v9);
- #else
- if (current_architecture == SPARC_OPCODE_ARCH_V9)
- bfd_set_arch_mach (stdoutput, bfd_arch_sparc, bfd_mach_sparc_v8plus);
- else if (current_architecture == SPARC_OPCODE_ARCH_V9A)
- bfd_set_arch_mach (stdoutput, bfd_arch_sparc, bfd_mach_sparc_v8plusa);
- else if (current_architecture == SPARC_OPCODE_ARCH_SPARCLET)
- bfd_set_arch_mach (stdoutput, bfd_arch_sparc, bfd_mach_sparc_sparclet);
- else
- {
- /* The sparclite is treated like a normal sparc. Perhaps it shouldn't
- be but for now it is (since that's the way it's always been
- treated). */
- bfd_set_arch_mach (stdoutput, bfd_arch_sparc, bfd_mach_sparc);
- }
- #endif
- }
-
- void
- md_assemble (str)
- char *str;
- {
- const struct sparc_opcode *insn;
- char *toP;
- int rsd;
-
- know (str);
- sparc_ip (str, &insn);
-
- /* We warn about attempts to put a floating point branch in a delay
- slot. */
- if (insn != NULL
- && last_insn != NULL
- && (insn->flags & F_FBR) != 0
- && (last_insn->flags & F_DELAYED) != 0)
- as_warn ("FP branch in delay slot");
-
- /* SPARC before v9 requires a nop instruction between a floating
- point instruction and a floating point branch. We insert one
- automatically, with a warning. */
- if (max_architecture < SPARC_OPCODE_ARCH_V9
- && insn != NULL
- && last_insn != NULL
- && (insn->flags & F_FBR) != 0
- && (last_insn->flags & F_FLOAT) != 0)
- {
- as_warn ("FP branch preceded by FP instruction; NOP inserted");
- toP = frag_more (4);
- md_number_to_chars (toP, (valueT) 0x01000000, 4);
- }
-
- /* See if "set" operand is absolute and small; skip sethi if so. */
- if (special_case == SPECIAL_CASE_SET
- && the_insn.exp.X_op == O_constant)
- {
- 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, (valueT) the_insn.opcode, 4);
-
- /* put out the symbol-dependent stuff */
- if (the_insn.reloc != BFD_RELOC_NONE)
- {
- fix_new_exp (frag_now, /* which frag */
- (toP - frag_now->fr_literal), /* where */
- 4, /* size */
- &the_insn.exp,
- the_insn.pcrel,
- the_insn.reloc);
- }
-
- last_insn = insn;
-
- 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_op == O_constant
- && ((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, (valueT) the_insn.opcode, 4);
- fix_new_exp (frag_now, /* which frag */
- (toP - frag_now->fr_literal), /* where */
- 4, /* size */
- &the_insn.exp,
- 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, (valueT) the_insn.opcode, 4);
- return;
-
- case 0:
- return;
-
- default:
- as_fatal ("failed sanity check.");
- }
- }
-
- /* Implement big shift right. */
- static bfd_vma
- BSR (val, amount)
- bfd_vma val;
- int amount;
- {
- if (sizeof (bfd_vma) <= 4 && amount >= 32)
- as_fatal ("Support for 64-bit arithmetic not compiled in.");
- return val >> amount;
- }
-
- /* Parse an argument that can be expressed as a keyword.
- (eg: #StoreStore or %ccfr).
- The result is a boolean indicating success.
- If successful, INPUT_POINTER is updated. */
-
- static int
- parse_keyword_arg (lookup_fn, input_pointerP, valueP)
- int (*lookup_fn) ();
- char **input_pointerP;
- int *valueP;
- {
- int value;
- char c, *p, *q;
-
- p = *input_pointerP;
- for (q = p + (*p == '#' || *p == '%'); isalpha (*q) || *q == '_'; ++q)
- continue;
- c = *q;
- *q = 0;
- value = (*lookup_fn) (p);
- *q = c;
- if (value == -1)
- return 0;
- *valueP = value;
- *input_pointerP = q;
- return 1;
- }
-
- /* Parse an argument that is a constant expression.
- The result is a boolean indicating success. */
-
- static int
- parse_const_expr_arg (input_pointerP, valueP)
- char **input_pointerP;
- int *valueP;
- {
- char *save = input_line_pointer;
- expressionS exp;
-
- input_line_pointer = *input_pointerP;
- /* The next expression may be something other than a constant
- (say if we're not processing the right variant of the insn).
- Don't call expression unless we're sure it will succeed as it will
- signal an error (which we want to defer until later). */
- /* FIXME: It might be better to define md_operand and have it recognize
- things like %asi, etc. but continuing that route through to the end
- is a lot of work. */
- if (*input_line_pointer == '%')
- {
- input_line_pointer = save;
- return 0;
- }
- expression (&exp);
- *input_pointerP = input_line_pointer;
- input_line_pointer = save;
- if (exp.X_op != O_constant)
- return 0;
- *valueP = exp.X_add_number;
- return 1;
- }
-
- static void
- sparc_ip (str, pinsn)
- char *str;
- const struct sparc_opcode **pinsn;
- {
- char *error_message = "";
- char *s;
- const char *args;
- char c;
- const struct sparc_opcode *insn;
- char *argsStart;
- unsigned long opcode;
- unsigned int mask = 0;
- int match = 0;
- int comma = 0;
- long immediate_max = 0;
- int v9_arg_p;
-
- 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_fatal ("Unknown opcode: `%s'", str);
- }
- insn = (struct sparc_opcode *) hash_find (op_hash, str);
- *pinsn = insn;
- if (insn == 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;
- v9_arg_p = 0;
-
- /*
- * Build the opcode, checking as we go to make
- * sure that the operands match
- */
- for (args = insn->args;; ++args)
- {
- switch (*args)
- {
- case 'K':
- {
- int kmask = 0;
-
- /* Parse a series of masks. */
- if (*s == '#')
- {
- while (*s == '#')
- {
- int mask;
-
- if (! parse_keyword_arg (sparc_encode_membar, &s,
- &mask))
- {
- error_message = ": invalid membar mask name";
- goto error;
- }
- kmask |= mask;
- while (*s == ' ') { ++s; continue; }
- if (*s == '|' || *s == '+')
- ++s;
- while (*s == ' ') { ++s; continue; }
- }
- }
- else
- {
- if (! parse_const_expr_arg (&s, &kmask))
- {
- error_message = ": invalid membar mask expression";
- goto error;
- }
- if (kmask < 0 || kmask > 127)
- {
- error_message = ": invalid membar mask number";
- goto error;
- }
- }
-
- opcode |= MEMBAR (kmask);
- continue;
- }
-
- case '*':
- {
- int fcn = 0;
-
- /* Parse a prefetch function. */
- if (*s == '#')
- {
- if (! parse_keyword_arg (sparc_encode_prefetch, &s, &fcn))
- {
- error_message = ": invalid prefetch function name";
- goto error;
- }
- }
- else
- {
- if (! parse_const_expr_arg (&s, &fcn))
- {
- error_message = ": invalid prefetch function expression";
- goto error;
- }
- if (fcn < 0 || fcn > 31)
- {
- error_message = ": invalid prefetch function number";
- goto error;
- }
- }
- opcode |= RD (fcn);
- continue;
- }
-
- case '!':
- case '?':
- /* Parse a sparc64 privileged register. */
- if (*s == '%')
- {
- struct priv_reg_entry *p = priv_reg_table;
- unsigned int len = 9999999; /* init to make gcc happy */
-
- s += 1;
- while (p->name[0] > s[0])
- p++;
- while (p->name[0] == s[0])
- {
- len = strlen (p->name);
- if (strncmp (p->name, s, len) == 0)
- break;
- p++;
- }
- if (p->name[0] != s[0])
- {
- error_message = ": unrecognizable privileged register";
- goto error;
- }
- if (*args == '?')
- opcode |= (p->regnum << 14);
- else
- opcode |= (p->regnum << 25);
- s += len;
- continue;
- }
- else
- {
- error_message = ": unrecognizable privileged register";
- goto error;
- }
-
- 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 (current_architecture >= SPARC_OPCODE_ARCH_V9)
- {
- if (num < 16 || 31 < num)
- {
- error_message = ": asr number must be between 16 and 31";
- goto error;
- }
- }
- else
- {
- if (num < 0 || 31 < num)
- {
- error_message = ": asr number must be between 0 and 31";
- goto error;
- }
- }
-
- opcode |= (*args == 'M' ? RS1 (num) : RD (num));
- continue;
- }
- else
- {
- error_message = ": expecting %asrN";
- goto error;
- }
- } /* if %asr */
- break;
-
- case 'I':
- the_insn.reloc = BFD_RELOC_SPARC_11;
- immediate_max = 0x03FF;
- goto immediate;
-
- case 'j':
- the_insn.reloc = BFD_RELOC_SPARC_10;
- immediate_max = 0x01FF;
- goto immediate;
-
- case 'X':
- /* V8 systems don't understand BFD_RELOC_SPARC_5. */
- if (SPARC_OPCODE_ARCH_V9_P (max_architecture))
- the_insn.reloc = BFD_RELOC_SPARC_5;
- else
- the_insn.reloc = BFD_RELOC_SPARC13;
- /* These fields are unsigned, but for upward compatibility,
- allow negative values as well. */
- immediate_max = 0x1f;
- goto immediate;
-
- case 'Y':
- /* V8 systems don't understand BFD_RELOC_SPARC_6. */
- if (SPARC_OPCODE_ARCH_V9_P (max_architecture))
- the_insn.reloc = BFD_RELOC_SPARC_6;
- else
- the_insn.reloc = BFD_RELOC_SPARC13;
- /* These fields are unsigned, but for upward compatibility,
- allow negative values as well. */
- immediate_max = 0x3f;
- goto immediate;
-
- case 'k':
- the_insn.reloc = /* RELOC_WDISP2_14 */ BFD_RELOC_SPARC_WDISP16;
- the_insn.pcrel = 1;
- goto immediate;
-
- case 'G':
- the_insn.reloc = BFD_RELOC_SPARC_WDISP19;
- the_insn.pcrel = 1;
- goto immediate;
-
- case 'N':
- if (*s == 'p' && s[1] == 'n')
- {
- s += 2;
- continue;
- }
- break;
-
- case 'T':
- if (*s == 'p' && s[1] == 't')
- {
- s += 2;
- continue;
- }
- break;
-
- case 'z':
- if (*s == ' ')
- {
- ++s;
- }
- if (strncmp (s, "%icc", 4) == 0)
- {
- s += 4;
- continue;
- }
- break;
-
- case 'Z':
- if (*s == ' ')
- {
- ++s;
- }
- if (strncmp (s, "%xcc", 4) == 0)
- {
- s += 4;
- continue;
- }
- break;
-
- case '6':
- if (*s == ' ')
- {
- ++s;
- }
- if (strncmp (s, "%fcc0", 5) == 0)
- {
- s += 5;
- continue;
- }
- break;
-
- case '7':
- if (*s == ' ')
- {
- ++s;
- }
- if (strncmp (s, "%fcc1", 5) == 0)
- {
- s += 5;
- continue;
- }
- break;
-
- case '8':
- if (*s == ' ')
- {
- ++s;
- }
- if (strncmp (s, "%fcc2", 5) == 0)
- {
- s += 5;
- continue;
- }
- break;
-
- case '9':
- if (*s == ' ')
- {
- ++s;
- }
- if (strncmp (s, "%fcc3", 5) == 0)
- {
- s += 5;
- continue;
- }
- break;
-
- case 'P':
- if (strncmp (s, "%pc", 3) == 0)
- {
- s += 3;
- continue;
- }
- break;
-
- case 'W':
- if (strncmp (s, "%tick", 5) == 0)
- {
- s += 5;
- continue;
- }
- 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 'O':
- 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;
-
- case 'O':
- opcode |= (mask << 25) | (mask << 0);
- 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 (mask >= 64)
- {
- if (SPARC_OPCODE_ARCH_V9_P (max_architecture))
- error_message = ": There are only 64 f registers; [0-63]";
- else
- error_message = ": There are only 32 f registers; [0-31]";
- goto error;
- } /* on error */
- else if (mask >= 32)
- {
- if (SPARC_OPCODE_ARCH_V9_P (max_architecture))
- {
- v9_arg_p = 1;
- mask -= 31; /* wrap high bit */
- }
- else
- {
- error_message = ": There are only 32 f registers; [0-31]";
- goto error;
- }
- }
- }
- else
- {
- break;
- } /* if not an 'f' register. */
-
- 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 */
- the_insn.reloc = BFD_RELOC_SPARC13;
- 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 if (c == 'u'
- && s[2] == 'h'
- && s[3] == 'i')
- {
- the_insn.reloc = BFD_RELOC_SPARC_HH22;
- s += 4;
- v9_arg_p = 1;
- }
- else if (c == 'u'
- && s[2] == 'l'
- && s[3] == 'o')
- {
- the_insn.reloc = BFD_RELOC_SPARC_HM10;
- s += 4;
- v9_arg_p = 1;
- }
- 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;
-
- if (the_insn.exp.X_op == O_constant
- && the_insn.exp.X_add_symbol == 0
- && the_insn.exp.X_op_symbol == 0)
- {
- /* Handle %uhi/%ulo by moving the upper word to the lower
- one and pretending it's %hi/%lo. We also need to watch
- for %hi/%lo: the top word needs to be zeroed otherwise
- fixup_segment will complain the value is too big. */
- switch (the_insn.reloc)
- {
- case BFD_RELOC_SPARC_HH22:
- the_insn.reloc = BFD_RELOC_HI22;
- the_insn.exp.X_add_number = BSR (the_insn.exp.X_add_number, 32);
- break;
- case BFD_RELOC_SPARC_HM10:
- the_insn.reloc = BFD_RELOC_LO10;
- the_insn.exp.X_add_number = BSR (the_insn.exp.X_add_number, 32);
- break;
- case BFD_RELOC_HI22:
- case BFD_RELOC_LO10:
- the_insn.exp.X_add_number &= 0xffffffff;
- break;
- default:
- break;
- }
-
- /* For pc-relative call instructions, we reject
- constants to get better code. */
- if (the_insn.pcrel
- && the_insn.reloc == BFD_RELOC_32_PCREL_S2
- && in_signed_range (the_insn.exp.X_add_number, 0x3fff)
- )
- {
- error_message = ": PC-relative operand can't be a constant";
- goto error;
- }
- /* 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
- && !in_signed_range (the_insn.exp.X_add_number,
- immediate_max)
- )
- {
- if (the_insn.pcrel)
- /* Who knows? After relocation, we may be within
- range. Let the linker figure it out. */
- {
- the_insn.exp.X_op = O_symbol;
- the_insn.exp.X_add_symbol = section_symbol (absolute_section);
- }
- else
- /* Immediate value is non-pcrel, and out of
- range. */
- as_bad ("constant value %ld out of range (%ld .. %ld)",
- the_insn.exp.X_add_number,
- ~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':
- {
- int asi = 0;
-
- /* Parse an asi. */
- if (*s == '#')
- {
- if (! parse_keyword_arg (sparc_encode_asi, &s, &asi))
- {
- error_message = ": invalid ASI name";
- goto error;
- }
- }
- else
- {
- if (! parse_const_expr_arg (&s, &asi))
- {
- error_message = ": invalid ASI expression";
- goto error;
- }
- if (asi < 0 || asi > 255)
- {
- error_message = ": invalid ASI number";
- goto error;
- }
- }
- opcode |= ASI (asi);
- continue;
- } /* 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 'o':
- if (strncmp (s, "%asi", 4) != 0)
- break;
- s += 4;
- continue;
-
- case 's':
- if (strncmp (s, "%fprs", 5) != 0)
- break;
- s += 5;
- continue;
-
- case 'E':
- if (strncmp (s, "%ccr", 4) != 0)
- break;
- s += 4;
- continue;
-
- 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 'x':
- {
- char *push = input_line_pointer;
- expressionS e;
-
- input_line_pointer = s;
- expression (&e);
- if (e.X_op == O_constant)
- {
- int n = e.X_add_number;
- if (n != e.X_add_number || (n & ~0x1ff) != 0)
- as_bad ("OPF immediate operand out of range (0-0x1ff)");
- else
- opcode |= e.X_add_number << 5;
- }
- else
- as_bad ("non-immediate OPF operand, ignored");
- s = input_line_pointer;
- input_line_pointer = push;
- continue;
- }
-
- case 'y':
- if (strncmp (s, "%y", 2) != 0)
- break;
- s += 2;
- continue;
-
- case 'u':
- case 'U':
- {
- /* Parse a sparclet cpreg. */
- int cpreg;
- if (! parse_keyword_arg (sparc_encode_sparclet_cpreg, &s, &cpreg))
- {
- error_message = ": invalid cpreg name";
- goto error;
- }
- opcode |= (*args == 'U' ? RS1 (cpreg) : RD (cpreg));
- continue;
- }
-
- default:
- as_fatal ("failed sanity check.");
- } /* switch on arg code */
-
- /* Break out of for() loop. */
- break;
- } /* for each arg that we expect */
-
- error:
- if (match == 0)
- {
- /* Args don't match. */
- if (((unsigned) (&insn[1] - sparc_opcodes)) < sparc_num_opcodes
- && (insn->name == insn[1].name
- || !strcmp (insn->name, insn[1].name)))
- {
- ++insn;
- s = argsStart;
- continue;
- }
- else
- {
- as_bad ("Illegal operands%s", error_message);
- return;
- }
- }
- else
- {
- /* We have a match. Now see if the architecture is ok. */
- int needed_arch_mask = insn->architecture;
-
- if (v9_arg_p)
- {
- needed_arch_mask &= ~ ((1 << SPARC_OPCODE_ARCH_V9)
- | (1 << SPARC_OPCODE_ARCH_V9A));
- needed_arch_mask |= (1 << SPARC_OPCODE_ARCH_V9);
- }
-
- if (needed_arch_mask & SPARC_OPCODE_SUPPORTED (current_architecture))
- ; /* ok */
- /* Can we bump up the architecture? */
- else if (needed_arch_mask & SPARC_OPCODE_SUPPORTED (max_architecture))
- {
- enum sparc_opcode_arch_val needed_architecture =
- sparc_ffs (SPARC_OPCODE_SUPPORTED (max_architecture)
- & needed_arch_mask);
-
- assert (needed_architecture <= SPARC_OPCODE_ARCH_MAX);
- if (warn_on_bump
- && needed_architecture > warn_after_architecture)
- {
- as_warn ("architecture bumped from \"%s\" to \"%s\" on \"%s\"",
- sparc_opcode_archs[current_architecture].name,
- sparc_opcode_archs[needed_architecture].name,
- str);
- warn_after_architecture = needed_architecture;
- }
- current_architecture = needed_architecture;
- }
- /* Conflict. */
- /* ??? This seems to be a bit fragile. What if the next entry in
- the opcode table is the one we want and it is supported?
- It is possible to arrange the table today so that this can't
- happen but what about tomorrow? */
- else
- {
- int arch,printed_one_p = 0;
- char *p;
- char required_archs[SPARC_OPCODE_ARCH_MAX * 16];
-
- /* Create a list of the architectures that support the insn. */
- needed_arch_mask &= ~ SPARC_OPCODE_SUPPORTED (max_architecture);
- p = required_archs;
- arch = sparc_ffs (needed_arch_mask);
- while ((1 << arch) <= needed_arch_mask)
- {
- if ((1 << arch) & needed_arch_mask)
- {
- if (printed_one_p)
- *p++ = '|';
- strcpy (p, sparc_opcode_archs[arch].name);
- p += strlen (p);
- printed_one_p = 1;
- }
- ++arch;
- }
-
- as_bad ("Architecture mismatch on \"%s\".", str);
- as_tsktsk (" (Requires %s; requested architecture is %s.)",
- required_archs,
- sparc_opcode_archs[max_architecture].name);
- return;
- }
- } /* if no match */
-
- break;
- } /* forever looking for a match */
-
- the_insn.opcode = opcode;
- }
-
- 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)
- {
- 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, (valueT) (*wordP++), sizeof (LITTLENUM_TYPE));
- litP += sizeof (LITTLENUM_TYPE);
- }
- return 0;
- }
-
- /*
- * Write out big-endian.
- */
- void
- md_number_to_chars (buf, val, n)
- char *buf;
- valueT val;
- int n;
- {
- number_to_chars_bigendian (buf, val, n);
- }
-
- /* Apply a fixS to the frags, now that we know the value it ought to
- hold. */
-
- int
- md_apply_fix (fixP, value)
- fixS *fixP;
- valueT *value;
- {
- char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
- offsetT val;
-
- val = *value;
-
- assert (fixP->fx_r_type < BFD_RELOC_UNUSED);
-
- fixP->fx_addnumber = val; /* Remember value for emit_reloc */
-
- #ifdef OBJ_ELF
- /* FIXME: SPARC ELF relocations don't use an addend in the data
- field itself. This whole approach should be somehow combined
- with the calls to bfd_perform_relocation. Also, the value passed
- in by fixup_segment includes the value of a defined symbol. We
- don't want to include the value of an externally visible symbol. */
- if (fixP->fx_addsy != NULL)
- {
- if ((S_IS_EXTERNAL (fixP->fx_addsy)
- || S_IS_WEAK (fixP->fx_addsy)
- || (sparc_pic_code && ! fixP->fx_pcrel))
- && S_GET_SEGMENT (fixP->fx_addsy) != absolute_section
- && S_GET_SEGMENT (fixP->fx_addsy) != undefined_section
- && ! bfd_is_com_section (S_GET_SEGMENT (fixP->fx_addsy)))
- fixP->fx_addnumber -= S_GET_VALUE (fixP->fx_addsy);
- return 1;
- }
- #endif
-
- /* This is a hack. There should be a better way to
- handle this. Probably in terms of howto fields, once
- we can look at these fixups in terms of howtos. */
- if (fixP->fx_r_type == BFD_RELOC_32_PCREL_S2 && fixP->fx_addsy)
- val += fixP->fx_where + fixP->fx_frag->fr_address;
-
- #ifdef OBJ_AOUT
- /* FIXME: More ridiculous gas reloc hacking. If we are going to
- generate a reloc, then we just want to let the reloc addend set
- the value. We do not want to also stuff the addend into the
- object file. Including the addend in the object file works when
- doing a static link, because the linker will ignore the object
- file contents. However, the dynamic linker does not ignore the
- object file contents. */
- if (fixP->fx_addsy != NULL
- && fixP->fx_r_type != BFD_RELOC_32_PCREL_S2)
- val = 0;
-
- /* When generating PIC code, we do not want an addend for a reloc
- against a local symbol. We adjust fx_addnumber to cancel out the
- value already included in val, and to also cancel out the
- adjustment which bfd_install_relocation will create. */
- if (sparc_pic_code
- && fixP->fx_r_type != BFD_RELOC_32_PCREL_S2
- && fixP->fx_addsy != NULL
- && ! S_IS_COMMON (fixP->fx_addsy)
- && (fixP->fx_addsy->bsym->flags & BSF_SECTION_SYM) == 0)
- fixP->fx_addnumber -= 2 * S_GET_VALUE (fixP->fx_addsy);
- #endif
-
- switch (fixP->fx_r_type)
- {
- case BFD_RELOC_16:
- buf[0] = val >> 8;
- buf[1] = val;
- break;
-
- case BFD_RELOC_32:
- buf[0] = val >> 24;
- buf[1] = val >> 16;
- buf[2] = val >> 8;
- buf[3] = val;
- break;
-
- case BFD_RELOC_32_PCREL_S2:
- val = val >> 2;
- /* FIXME: This increment-by-one deserves a comment of why it's
- being done! */
- if (! sparc_pic_code
- || fixP->fx_addsy == NULL
- || (fixP->fx_addsy->bsym->flags & BSF_SECTION_SYM) != 0)
- ++val;
- buf[0] |= (val >> 24) & 0x3f;
- buf[1] = val >> 16;
- buf[2] = val >> 8;
- buf[3] = val;
- break;
-
- case BFD_RELOC_64:
- {
- bfd_vma valh = BSR (val, 32);
- buf[0] = valh >> 24;
- buf[1] = valh >> 16;
- buf[2] = valh >> 8;
- buf[3] = valh;
- buf[4] = val >> 24;
- buf[5] = val >> 16;
- buf[6] = val >> 8;
- buf[7] = val;
- }
- break;
-
- case BFD_RELOC_SPARC_11:
- if (! in_signed_range (val, 0x7ff))
- as_bad ("relocation overflow.");
-
- buf[2] |= (val >> 8) & 0x7;
- buf[3] = val;
- break;
-
- case BFD_RELOC_SPARC_10:
- if (! in_signed_range (val, 0x3ff))
- as_bad ("relocation overflow.");
-
- buf[2] |= (val >> 8) & 0x3;
- buf[3] = val;
- break;
-
- case BFD_RELOC_SPARC_6:
- if (! in_bitfield_range (val, 0x3f))
- as_bad ("relocation overflow.");
-
- buf[3] |= val & 0x3f;
- break;
-
- case BFD_RELOC_SPARC_5:
- if (! in_bitfield_range (val, 0x1f))
- as_bad ("relocation overflow.");
-
- buf[3] |= val & 0x1f;
- break;
-
- case BFD_RELOC_SPARC_WDISP16:
- /* FIXME: simplify */
- if (((val > 0) && (val & ~0x3fffc))
- || ((val < 0) && (~(val - 1) & ~0x3fffc)))
- {
- as_bad ("relocation overflow.");
- }
-
- /* FIXME: The +1 deserves a comment. */
- val = (val >> 2) + 1;
- buf[1] |= ((val >> 14) & 0x3) << 4;
- buf[2] |= (val >> 8) & 0x3f;
- buf[3] = val;
- break;
-
- case BFD_RELOC_SPARC_WDISP19:
- /* FIXME: simplify */
- if (((val > 0) && (val & ~0x1ffffc))
- || ((val < 0) && (~(val - 1) & ~0x1ffffc)))
- {
- as_bad ("relocation overflow.");
- }
-
- /* FIXME: The +1 deserves a comment. */
- val = (val >> 2) + 1;
- buf[1] |= (val >> 16) & 0x7;
- buf[2] = (val >> 8) & 0xff;
- buf[3] = val;
- break;
-
- case BFD_RELOC_SPARC_HH22:
- val = BSR (val, 32);
- /* intentional fallthrough */
-
- case BFD_RELOC_SPARC_LM22:
- 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;
- break;
-
- case BFD_RELOC_SPARC_HM10:
- val = BSR (val, 32);
- /* intentional fallthrough */
-
- case BFD_RELOC_LO10:
- if (!fixP->fx_addsy)
- {
- buf[2] |= (val >> 8) & 0x03;
- buf[3] = val;
- }
- else
- buf[3] = 0;
- break;
-
- case BFD_RELOC_SPARC13:
- if (! in_signed_range (val, 0x1fff))
- as_bad ("relocation 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;
- }
-
- /* Are we finished with this relocation now? */
- if (fixP->fx_addsy == 0 && !fixP->fx_pcrel)
- fixP->fx_done = 1;
-
- return 1;
- }
-
- /* 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;
-
- switch (fixp->fx_r_type)
- {
- case BFD_RELOC_16:
- case BFD_RELOC_32:
- case BFD_RELOC_HI22:
- case BFD_RELOC_LO10:
- case BFD_RELOC_32_PCREL_S2:
- case BFD_RELOC_SPARC13:
- case BFD_RELOC_SPARC_BASE13:
- case BFD_RELOC_SPARC_WDISP16:
- case BFD_RELOC_SPARC_WDISP19:
- case BFD_RELOC_SPARC_WDISP22:
- case BFD_RELOC_64:
- case BFD_RELOC_SPARC_5:
- case BFD_RELOC_SPARC_6:
- case BFD_RELOC_SPARC_10:
- case BFD_RELOC_SPARC_11:
- case BFD_RELOC_SPARC_HH22:
- case BFD_RELOC_SPARC_HM10:
- case BFD_RELOC_SPARC_LM22:
- case BFD_RELOC_SPARC_PC_HH22:
- case BFD_RELOC_SPARC_PC_HM10:
- case BFD_RELOC_SPARC_PC_LM22:
- code = fixp->fx_r_type;
- break;
- default:
- abort ();
- }
-
- #if defined (OBJ_ELF) || defined (OBJ_AOUT)
- /* If we are generating PIC code, we need to generate a different
- set of relocs. */
-
- #ifdef OBJ_ELF
- #define GOT_NAME "_GLOBAL_OFFSET_TABLE_"
- #else
- #define GOT_NAME "__GLOBAL_OFFSET_TABLE_"
- #endif
-
- if (sparc_pic_code)
- {
- switch (code)
- {
- case BFD_RELOC_32_PCREL_S2:
- if (! S_IS_DEFINED (fixp->fx_addsy)
- || S_IS_EXTERNAL (fixp->fx_addsy)
- || S_IS_WEAK (fixp->fx_addsy))
- code = BFD_RELOC_SPARC_WPLT30;
- break;
- case BFD_RELOC_HI22:
- if (fixp->fx_addsy != NULL
- && strcmp (S_GET_NAME (fixp->fx_addsy), GOT_NAME) == 0)
- code = BFD_RELOC_SPARC_PC22;
- else
- code = BFD_RELOC_SPARC_GOT22;
- break;
- case BFD_RELOC_LO10:
- if (fixp->fx_addsy != NULL
- && strcmp (S_GET_NAME (fixp->fx_addsy), GOT_NAME) == 0)
- code = BFD_RELOC_SPARC_PC10;
- else
- code = BFD_RELOC_SPARC_GOT10;
- break;
- case BFD_RELOC_SPARC13:
- code = BFD_RELOC_SPARC_GOT13;
- break;
- default:
- break;
- }
- }
- #endif /* defined (OBJ_ELF) || defined (OBJ_AOUT) */
-
- reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
- if (reloc->howto == 0)
- {
- as_bad_where (fixp->fx_file, fixp->fx_line,
- "internal error: can't export reloc type %d (`%s')",
- fixp->fx_r_type, bfd_get_reloc_code_name (code));
- return 0;
- }
-
- /* @@ Why fx_addnumber sometimes and fx_offset other times? */
- #ifdef OBJ_AOUT
-
- if (reloc->howto->pc_relative == 0
- || code == BFD_RELOC_SPARC_PC10
- || code == BFD_RELOC_SPARC_PC22)
- reloc->addend = fixp->fx_addnumber;
- else
- reloc->addend = fixp->fx_offset - reloc->address;
-
- #else /* elf or coff */
-
- if (reloc->howto->pc_relative == 0
- || code == BFD_RELOC_SPARC_PC10
- || code == BFD_RELOC_SPARC_PC22)
- reloc->addend = fixp->fx_addnumber;
- else if ((fixp->fx_addsy->bsym->flags & BSF_SECTION_SYM) != 0)
- reloc->addend = (section->vma
- + fixp->fx_addnumber
- + md_pcrel_from (fixp));
- else
- reloc->addend = fixp->fx_offset;
- #endif
-
- return reloc;
- }
-
-
- #if 0
- /* for debugging only */
- static void
- print_insn (insn)
- struct sparc_it *insn;
- {
- const char *const 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_op_symbol != NULL)
- ? (S_GET_NAME (insn->exp.X_op_symbol)
- ? S_GET_NAME (insn->exp.X_op_symbol)
- : "???")
- : "0"));
- fprintf (stderr, "\t\tX_add_number = %d\n",
- insn->exp.X_add_number);
- fprintf (stderr, "}\n");
- }
- #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, -Av9, -Av9a, -Asparclite
- * -xarch=v8plus, -xarch=v8plusa
- * 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 32 bit
- * environments, v9 is not bumped up to, the user must pass -Av9.
- *
- * -xarch=v8plus{,a} is for compatibility with the Sun assembler.
- *
- * 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. Note that in the 32 bit environment specifying
- * -Av9 does not automatically create a v9 object file, a v9
- * insn must be seen.
- *
- * If both an architecture and -bump are specified, the
- * architecture starts at the specified level, but bumps are
- * warnings. Note that we can't set `current_architecture' to
- * the requested level in this case: in the 32 bit environment,
- * we still must avoid creating v9 object files unless v9 insns
- * are seen.
- *
- * Note:
- * Bumping between incompatible architectures is always an
- * error. For example, from sparclite to v9.
- */
-
- #ifdef OBJ_ELF
- CONST char *md_shortopts = "A:K:VQ:sq";
- #else
- #ifdef OBJ_AOUT
- CONST char *md_shortopts = "A:k";
- #else
- CONST char *md_shortopts = "A:";
- #endif
- #endif
- struct option md_longopts[] = {
- #define OPTION_BUMP (OPTION_MD_BASE)
- {"bump", no_argument, NULL, OPTION_BUMP},
- #define OPTION_SPARC (OPTION_MD_BASE + 1)
- {"sparc", no_argument, NULL, OPTION_SPARC},
- #define OPTION_XARCH (OPTION_MD_BASE + 2)
- {"xarch", required_argument, NULL, OPTION_XARCH},
- {NULL, no_argument, NULL, 0}
- };
- size_t md_longopts_size = sizeof(md_longopts);
-
- int
- md_parse_option (c, arg)
- int c;
- char *arg;
- {
- switch (c)
- {
- case OPTION_BUMP:
- warn_on_bump = 1;
- warn_after_architecture = SPARC_OPCODE_ARCH_V6;
- break;
-
- case OPTION_XARCH:
- /* ??? We could add v8plus and v8plusa to sparc_opcode_archs.
- But we might want v8plus to mean something different than v9
- someday, and we'd recognize more -xarch options than Sun's
- assembler does (which may lead to a conflict someday). */
- if (strcmp (arg, "v8plus") == 0)
- arg = "v9";
- else if (strcmp (arg, "v8plusa") == 0)
- arg = "v9a";
- else
- {
- as_bad ("invalid architecture -xarch=%s", arg);
- return 0;
- }
-
- /* fall through */
-
- case 'A':
- {
- enum sparc_opcode_arch_val new_arch = sparc_opcode_lookup_arch (arg);
-
- if (new_arch == SPARC_OPCODE_ARCH_BAD)
- {
- as_bad ("invalid architecture -A%s", arg);
- return 0;
- }
- else
- {
- max_architecture = new_arch;
- architecture_requested = 1;
- }
- }
- break;
-
- case OPTION_SPARC:
- /* Ignore -sparc, used by SunOS make default .s.o rule. */
- break;
-
- #ifdef OBJ_AOUT
- case 'k':
- sparc_pic_code = 1;
- break;
- #endif
-
- #ifdef OBJ_ELF
- case 'V':
- print_version_id ();
- break;
-
- case 'Q':
- /* Qy - do emit .comment
- Qn - do not emit .comment */
- break;
-
- case 's':
- /* use .stab instead of .stab.excl */
- break;
-
- case 'q':
- /* quick -- native assembler does fewer checks */
- break;
-
- case 'K':
- if (strcmp (arg, "PIC") != 0)
- as_warn ("Unrecognized option following -K");
- else
- sparc_pic_code = 1;
- break;
- #endif
-
- default:
- return 0;
- }
-
- return 1;
- }
-
- void
- md_show_usage (stream)
- FILE *stream;
- {
- const struct sparc_opcode_arch *arch;
-
- fprintf(stream, "SPARC options:\n");
- for (arch = &sparc_opcode_archs[0]; arch->name; arch++)
- {
- if (arch != &sparc_opcode_archs[0])
- fprintf (stream, " | ");
- fprintf (stream, "-A%s", arch->name);
- }
- fprintf (stream, "\n-xarch=v8plus | -xarch=v8plusa\n");
- fprintf (stream, "\
- specify variant of SPARC architecture\n\
- -bump warn when assembler switches architectures\n\
- -sparc ignored\n");
- #ifdef OBJ_AOUT
- fprintf (stream, "\
- -k generate PIC\n");
- #endif
- #ifdef OBJ_ELF
- fprintf (stream, "\
- -KPIC generate PIC\n\
- -V print assembler version number\n\
- -q ignored\n\
- -Qy, -Qn ignored\n\
- -s ignored\n");
- #endif
- }
-
- /* We have no need to default values of symbols. */
-
- /* ARGSUSED */
- symbolS *
- md_undefined_symbol (name)
- char *name;
- {
- return 0;
- } /* md_undefined_symbol() */
-
- /* Round up a section size to the appropriate boundary. */
- valueT
- md_section_align (segment, size)
- segT segment;
- valueT size;
- {
- #ifndef OBJ_ELF
- /* This is not right for ELF; a.out wants it, and COFF will force
- the alignment anyways. */
- valueT align = ((valueT) 1
- << (valueT) bfd_get_section_alignment (stdoutput, segment));
- valueT newsize;
- /* turn alignment value into a mask */
- align--;
- newsize = (size + align) & ~align;
- return newsize;
- #else
- return size;
- #endif
- }
-
- /* 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;
- {
- long ret;
-
- ret = fixP->fx_where + fixP->fx_frag->fr_address;
- if (! sparc_pic_code
- || fixP->fx_addsy == NULL
- || (fixP->fx_addsy->bsym->flags & BSF_SECTION_SYM) != 0)
- ret += fixP->fx_size;
- return ret;
- }
-
- /* end of tc-sparc.c */
-