/* write.c - emit .o file
+ Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 96, 97, 98, 1999
+ Free Software Foundation, Inc.
- Copyright (C) 1986, 1987, 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. */
+ 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. */
/* This thing should be set up to do byteordering correctly. But... */
#include "obstack.h"
#include "output-file.h"
-/* The NOP_OPCODE is for the alignment fill value.
- * fill it a nop instruction so that the disassembler does not choke
- * on it
- */
+/* This looks like a good idea. Let's try turning it on always, for now. */
+#undef BFD_FAST_SECTION_FILL
+#define BFD_FAST_SECTION_FILL
+
+/* The NOP_OPCODE is for the alignment fill value. Fill it with a nop
+ instruction so that the disassembler does not choke on it. */
#ifndef NOP_OPCODE
#define NOP_OPCODE 0x00
#endif
-#ifndef MANY_SEGMENTS
-static struct frag *text_frag_root;
-static struct frag *data_frag_root;
+#ifndef TC_ADJUST_RELOC_COUNT
+#define TC_ADJUST_RELOC_COUNT(FIXP,COUNT)
+#endif
-static struct frag *text_last_frag; /* Last frag in segment. */
-static struct frag *data_last_frag; /* Last frag in segment. */
+#ifndef TC_FORCE_RELOCATION
+#define TC_FORCE_RELOCATION(FIXP) 0
#endif
-static object_headers headers;
+#ifndef TC_FORCE_RELOCATION_SECTION
+#define TC_FORCE_RELOCATION_SECTION(FIXP,SEG) TC_FORCE_RELOCATION(FIXP)
+#endif
-long string_byte_count;
+#ifndef MD_PCREL_FROM_SECTION
+#define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from(FIXP)
+#endif
+
+#ifndef WORKING_DOT_WORD
+extern CONST int md_short_jump_size;
+extern CONST int md_long_jump_size;
+#endif
-static char *the_object_file;
+int symbol_table_frozen;
+void print_fixup PARAMS ((fixS *));
-char *next_object_file_charP; /* Tracks object file bytes. */
+#ifdef BFD_ASSEMBLER
+static void renumber_sections PARAMS ((bfd *, asection *, PTR));
-int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE;
+/* We generally attach relocs to frag chains. However, after we have
+ chained these all together into a segment, any relocs we add after
+ that must be attached to a segment. This will include relocs added
+ in md_estimate_size_for_relax, for example. */
+static int frags_chained = 0;
+#endif
-/* static long length; JF unused */ /* String length, including trailing '\0'. */
+#ifndef BFD_ASSEMBLER
+#ifndef MANY_SEGMENTS
+struct frag *text_frag_root;
+struct frag *data_frag_root;
+struct frag *bss_frag_root;
-#if __STDC__ == 1
+struct frag *text_last_frag; /* Last frag in segment. */
+struct frag *data_last_frag; /* Last frag in segment. */
+static struct frag *bss_last_frag; /* Last frag in segment. */
+#endif
-static int is_dnrange(struct frag *f1, struct frag *f2);
-static long fixup_segment(fixS *fixP, segT this_segment_type);
-static relax_addressT relax_align(relax_addressT address, long alignment);
-void relax_segment(struct frag *segment_frag_root, segT segment_type);
+#ifndef BFD
+static object_headers headers;
+#endif
-#else
+long string_byte_count;
+char *next_object_file_charP; /* Tracks object file bytes. */
+
+#ifndef OBJ_VMS
+int magic_number_for_object_file = DEFAULT_MAGIC_NUMBER_FOR_OBJECT_FILE;
+#endif
-static int is_dnrange();
-static long fixup_segment();
-static relax_addressT relax_align();
-void relax_segment();
+#endif /* BFD_ASSEMBLER */
-#endif /* not __STDC__ */
+static int n_fixups;
+
+#ifdef BFD_ASSEMBLER
+static fixS *fix_new_internal PARAMS ((fragS *, int where, int size,
+ symbolS *add, symbolS *sub,
+ offsetT offset, int pcrel,
+ bfd_reloc_code_real_type r_type));
+#else
+static fixS *fix_new_internal PARAMS ((fragS *, int where, int size,
+ symbolS *add, symbolS *sub,
+ offsetT offset, int pcrel,
+ int r_type));
+#endif
+#if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS))
+static long fixup_segment PARAMS ((fixS * fixP, segT this_segment_type));
+#endif
+static relax_addressT relax_align PARAMS ((relax_addressT addr, int align));
+#if defined (BFD_ASSEMBLER) || ! defined (BFD)
+static fragS *chain_frchains_together_1 PARAMS ((segT, struct frchain *));
+#endif
+#ifdef BFD_ASSEMBLER
+static void chain_frchains_together PARAMS ((bfd *, segT, PTR));
+static void cvt_frag_to_fill PARAMS ((segT, fragS *));
+static void relax_and_size_seg PARAMS ((bfd *, asection *, PTR));
+static void adjust_reloc_syms PARAMS ((bfd *, asection *, PTR));
+static void write_relocs PARAMS ((bfd *, asection *, PTR));
+static void write_contents PARAMS ((bfd *, asection *, PTR));
+static void set_symtab PARAMS ((void));
+#endif
+#if defined (BFD_ASSEMBLER) || (! defined (BFD) && ! defined (OBJ_AOUT))
+static void merge_data_into_text PARAMS ((void));
+#endif
+#if ! defined (BFD_ASSEMBLER) && ! defined (BFD)
+static void cvt_frag_to_fill PARAMS ((object_headers *, segT, fragS *));
+static void remove_subsegs PARAMS ((frchainS *, int, fragS **, fragS **));
+static void relax_and_size_all_segments PARAMS ((void));
+#endif
/*
* fix_new()
*
* Create a fixS in obstack 'notes'.
*/
-fixS *fix_new(frag, where, size, add_symbol, sub_symbol, offset, pcrel, r_type)
-fragS *frag; /* Which frag? */
-int where; /* Where in that frag? */
-short int size; /* 1, 2, or 4 usually. */
-symbolS *add_symbol; /* X_add_symbol. */
-symbolS *sub_symbol; /* X_subtract_symbol. */
-long offset; /* X_add_number. */
-int pcrel; /* TRUE if PC-relative relocation. */
-int r_type; /* Relocation type */
+static fixS *
+fix_new_internal (frag, where, size, add_symbol, sub_symbol, offset, pcrel,
+ r_type)
+ fragS *frag; /* Which frag? */
+ int where; /* Where in that frag? */
+ int size; /* 1, 2, or 4 usually. */
+ symbolS *add_symbol; /* X_add_symbol. */
+ symbolS *sub_symbol; /* X_op_symbol. */
+ offsetT offset; /* X_add_number. */
+ int pcrel; /* TRUE if PC-relative relocation. */
+#ifdef BFD_ASSEMBLER
+ bfd_reloc_code_real_type r_type; /* Relocation type */
+#else
+ int r_type; /* Relocation type */
+#endif
{
- fixS *fixP;
-
- fixP = (fixS *) obstack_alloc(¬es, sizeof(fixS));
-
- fixP->fx_frag = frag;
- fixP->fx_where = where;
- fixP->fx_size = size;
- fixP->fx_addsy = add_symbol;
- fixP->fx_subsy = sub_symbol;
- fixP->fx_offset = offset;
- fixP->fx_pcrel = pcrel;
-#if defined(TC_SPARC) || defined(TC_A29K) || defined( NEED_FX_R_TYPE)
- fixP->fx_r_type = r_type;
-#endif
- /* JF these 'cuz of the NS32K stuff */
- fixP->fx_im_disp = 0;
- fixP->fx_pcrel_adjust = 0;
- fixP->fx_bsr = 0;
- fixP->fx_bit_fixP = 0;
-
- /* usually, we want relocs sorted numerically, but while
- comparing to older versions of gas that have relocs
- reverse sorted, it is convenient to have this compile
- time option. xoxorich. */
-
+ fixS *fixP;
+
+ n_fixups++;
+
+ fixP = (fixS *) obstack_alloc (¬es, sizeof (fixS));
+
+ fixP->fx_frag = frag;
+ fixP->fx_where = where;
+ fixP->fx_size = size;
+ /* We've made fx_size a narrow field; check that it's wide enough. */
+ if (fixP->fx_size != size)
+ {
+ as_bad (_("field fx_size too small to hold %d"), size);
+ abort ();
+ }
+ fixP->fx_addsy = add_symbol;
+ fixP->fx_subsy = sub_symbol;
+ fixP->fx_offset = offset;
+ fixP->fx_pcrel = pcrel;
+ fixP->fx_plt = 0;
+#if defined(NEED_FX_R_TYPE) || defined (BFD_ASSEMBLER)
+ fixP->fx_r_type = r_type;
+#endif
+ fixP->fx_im_disp = 0;
+ fixP->fx_pcrel_adjust = 0;
+ fixP->fx_bit_fixP = 0;
+ fixP->fx_addnumber = 0;
+ fixP->fx_tcbit = 0;
+ fixP->fx_done = 0;
+ fixP->fx_no_overflow = 0;
+ fixP->fx_signed = 0;
+
+#ifdef USING_CGEN
+ fixP->fx_cgen.insn = NULL;
+ fixP->fx_cgen.opinfo = 0;
+#endif
+
+#ifdef TC_FIX_TYPE
+ TC_INIT_FIX_DATA(fixP);
+#endif
+
+ as_where (&fixP->fx_file, &fixP->fx_line);
+
+ /* Usually, we want relocs sorted numerically, but while
+ comparing to older versions of gas that have relocs
+ reverse sorted, it is convenient to have this compile
+ time option. xoxorich. */
+
+ {
+
+#ifdef BFD_ASSEMBLER
+ fixS **seg_fix_rootP = (frags_chained
+ ? &seg_info (now_seg)->fix_root
+ : &frchain_now->fix_root);
+ fixS **seg_fix_tailP = (frags_chained
+ ? &seg_info (now_seg)->fix_tail
+ : &frchain_now->fix_tail);
+#endif
+
#ifdef REVERSE_SORT_RELOCS
-
- fixP->fx_next = *seg_fix_rootP;
- *seg_fix_rootP = fixP;
-
+
+ fixP->fx_next = *seg_fix_rootP;
+ *seg_fix_rootP = fixP;
+
#else /* REVERSE_SORT_RELOCS */
-
- fixP->fx_next = NULL;
-
- if (*seg_fix_tailP)
- (*seg_fix_tailP)->fx_next = fixP;
- else
- *seg_fix_rootP = fixP;
- *seg_fix_tailP = fixP;
-
+
+ fixP->fx_next = NULL;
+
+ if (*seg_fix_tailP)
+ (*seg_fix_tailP)->fx_next = fixP;
+ else
+ *seg_fix_rootP = fixP;
+ *seg_fix_tailP = fixP;
+
#endif /* REVERSE_SORT_RELOCS */
-
- fixP->fx_callj = 0;
- return(fixP);
-} /* fix_new() */
-#ifndef BFD
-void write_object_file()
-{
- register struct frchain * frchainP; /* Track along all frchains. */
- register fragS * fragP; /* Track along all frags. */
- register struct frchain * next_frchainP;
- register fragS * * prev_fragPP;
- /* register char * name; */
- /* symbolS *symbolP; */
- /* register symbolS ** symbolPP; */
- /* register fixS * fixP; JF unused */
- unsigned int data_siz;
-
- long object_file_size;
-
-#ifdef VMS
- /*
- * Under VMS we try to be compatible with VAX-11 "C". Thus, we
- * call a routine to check for the definition of the procedure
- * "_main", and if so -- fix it up so that it can be program
- * entry point.
- */
- VMS_Check_For_Main();
-#endif /* VMS */
- /*
- * After every sub-segment, we fake an ".align ...". This conforms to BSD4.2
- * brane-damage. We then fake ".fill 0" because that is the kind of frag
- * that requires least thought. ".align" frags like to have a following
- * frag since that makes calculating their intended length trivial.
- */
-#define SUB_SEGMENT_ALIGN (2)
- for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next) {
-#ifdef VMS
- /*
- * Under VAX/VMS, the linker (and PSECT specifications)
- * take care of correctly aligning the segments.
- * Doing the alignment here (on initialized data) can
- * mess up the calculation of global data PSECT sizes.
- */
-#undef SUB_SEGMENT_ALIGN
-#define SUB_SEGMENT_ALIGN ((frchainP->frch_seg != SEG_DATA) ? 2 : 0)
-#endif /* VMS */
- subseg_new (frchainP->frch_seg, frchainP->frch_subseg);
- frag_align (SUB_SEGMENT_ALIGN, NOP_OPCODE);
- /* frag_align will have left a new frag. */
- /* Use this last frag for an empty ".fill". */
- /*
- * For this segment ...
- * Create a last frag. Do not leave a "being filled in frag".
- */
- frag_wane (frag_now);
- frag_now->fr_fix = 0;
- know( frag_now->fr_next == NULL );
- /* know( frags . obstack_c_base == frags . obstack_c_next_free ); */
- /* Above shows we haven't left a half-completed object on obstack. */
- } /* walk the frag chain */
-
- /*
- * From now on, we don't care about sub-segments.
- * Build one frag chain for each segment. Linked thru fr_next.
- * We know that there is at least 1 text frchain & at least 1 data frchain.
- */
- prev_fragPP = &text_frag_root;
- for (frchainP = frchain_root; frchainP; frchainP = next_frchainP) {
- know( frchainP->frch_root );
- * prev_fragPP = frchainP->frch_root;
- prev_fragPP = & frchainP->frch_last->fr_next;
-
- if (((next_frchainP = frchainP->frch_next) == NULL)
- || next_frchainP == data0_frchainP) {
- prev_fragPP = & data_frag_root;
- if (next_frchainP) {
- text_last_frag = frchainP->frch_last;
- } else {
- data_last_frag = frchainP->frch_last;
- }
- }
- } /* walk the frag chain */
-
- /*
- * We have two segments. If user gave -R flag, then we must put the
- * data frags into the text segment. Do this before relaxing so
- * we know to take advantage of -R and make shorter addresses.
- */
- if (flagseen[ 'R' ]) {
- fixS *tmp;
-
- text_last_frag->fr_next = data_frag_root;
- text_last_frag = data_last_frag;
- data_last_frag = NULL;
- data_frag_root = NULL;
- if (text_fix_root) {
- for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next) ;;
- tmp->fx_next=data_fix_root;
- text_fix_tail = data_fix_tail;
- } else
- text_fix_root=data_fix_root;
- data_fix_root=NULL;
- }
-
- relax_segment(text_frag_root, SEG_TEXT);
- relax_segment(data_frag_root, SEG_DATA);
- /*
- * Now the addresses of frags are correct within the segment.
- */
-
- know(text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0);
- H_SET_TEXT_SIZE(&headers, text_last_frag->fr_address);
- text_last_frag->fr_address = H_GET_TEXT_SIZE(&headers);
-
- /*
- * Join the 2 segments into 1 huge segment.
- * To do this, re-compute every rn_address in the SEG_DATA frags.
- * Then join the data frags after the text frags.
- *
- * Determine a_data [length of data segment].
- */
- if (data_frag_root) {
- register relax_addressT slide;
-
- know((text_last_frag->fr_type == rs_fill) && (text_last_frag->fr_offset == 0));
-
- H_SET_DATA_SIZE(&headers, data_last_frag->fr_address);
- data_last_frag->fr_address = H_GET_DATA_SIZE(&headers);
- slide = H_GET_TEXT_SIZE(&headers); /* & in file of the data segment. */
-#ifdef OBJ_BOUT
-#define RoundUp(N,S) (((N)+(S)-1)&-(S))
- /* For b.out: If the data section has a strict alignment
- requirement, its load address in the .o file will be
- rounded up from the size of the text section. These
- two values are *not* the same! Similarly for the bss
- section.... */
- slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]);
-#endif
-
- for (fragP = data_frag_root; fragP; fragP = fragP->fr_next) {
- fragP->fr_address += slide;
- } /* for each data frag */
-
- know(text_last_frag != 0);
- text_last_frag->fr_next = data_frag_root;
- } else {
- H_SET_DATA_SIZE(&headers,0);
- data_siz = 0;
- }
+ }
-#ifdef OBJ_BOUT
- /* See above comments on b.out data section address. */
- {
- long bss_vma;
- if (data_last_frag == 0)
- bss_vma = H_GET_TEXT_SIZE (&headers);
- else
- bss_vma = data_last_frag->fr_address;
- bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]);
- bss_address_frag.fr_address = bss_vma;
- }
+ return fixP;
+}
+
+/* Create a fixup relative to a symbol (plus a constant). */
+
+fixS *
+fix_new (frag, where, size, add_symbol, offset, pcrel, r_type)
+ fragS *frag; /* Which frag? */
+ int where; /* Where in that frag? */
+ int size; /* 1, 2, or 4 usually. */
+ symbolS *add_symbol; /* X_add_symbol. */
+ offsetT offset; /* X_add_number. */
+ int pcrel; /* TRUE if PC-relative relocation. */
+#ifdef BFD_ASSEMBLER
+ bfd_reloc_code_real_type r_type; /* Relocation type */
#else
- bss_address_frag.fr_address = (H_GET_TEXT_SIZE(&headers) +
- H_GET_DATA_SIZE(&headers));
-#endif
-
- H_SET_BSS_SIZE(&headers,local_bss_counter);
-
- /*
- *
- * Crawl the symbol chain.
- *
- * For each symbol whose value depends on a frag, take the address of
- * that frag and subsume it into the value of the symbol.
- * After this, there is just one way to lookup a symbol value.
- * Values are left in their final state for object file emission.
- * We adjust the values of 'L' local symbols, even if we do
- * not intend to emit them to the object file, because their values
- * are needed for fix-ups.
- *
- * Unless we saw a -L flag, remove all symbols that begin with 'L'
- * from the symbol chain. (They are still pointed to by the fixes.)
- *
- * Count the remaining symbols.
- * Assign a symbol number to each symbol.
- * Count the number of string-table chars we will emit.
- * Put this info into the headers as appropriate.
- *
- */
- know(zero_address_frag.fr_address == 0);
- string_byte_count = sizeof(string_byte_count);
-
- obj_crawl_symbol_chain(&headers);
-
- if (string_byte_count == sizeof(string_byte_count)) {
- string_byte_count = 0;
- } /* if no strings, then no count. */
-
- H_SET_STRING_SIZE(&headers, string_byte_count);
-
- /*
- * Addresses of frags now reflect addresses we use in the object file.
- * Symbol values are correct.
- * Scan the frags, converting any ".org"s and ".align"s to ".fill"s.
- * Also converting any machine-dependent frags using md_convert_frag();
- */
- subseg_change(SEG_TEXT, 0);
-
- for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) {
- switch (fragP->fr_type) {
- case rs_align:
- case rs_org:
- fragP->fr_type = rs_fill;
- know(fragP->fr_var == 1);
- know(fragP->fr_next != NULL);
-
- fragP->fr_offset = (fragP->fr_next->fr_address
- - fragP->fr_address
- - fragP->fr_fix);
- break;
-
- case rs_fill:
- break;
-
- case rs_machine_dependent:
- md_convert_frag(&headers, fragP);
-
- know((fragP->fr_next == NULL) || ((fragP->fr_next->fr_address - fragP->fr_address) == fragP->fr_fix));
-
- /*
- * After md_convert_frag, we make the frag into a ".space 0".
- * Md_convert_frag() should set up any fixSs and constants
- * required.
- */
- frag_wane(fragP);
- break;
-
-#ifndef WORKING_DOT_WORD
- case rs_broken_word: {
- struct broken_word *lie;
- extern md_short_jump_size;
- extern md_long_jump_size;
-
- if (fragP->fr_subtype) {
- fragP->fr_fix+=md_short_jump_size;
- for (lie=(struct broken_word *)(fragP->fr_symbol);lie && lie->dispfrag==fragP;lie=lie->next_broken_word)
- if (lie->added==1)
- fragP->fr_fix+=md_long_jump_size;
- }
- frag_wane(fragP);
- }
- break;
+ int r_type; /* Relocation type */
#endif
-
- default:
- BAD_CASE( fragP->fr_type );
- break;
- } /* switch (fr_type) */
+{
+ return fix_new_internal (frag, where, size, add_symbol,
+ (symbolS *) NULL, offset, pcrel, r_type);
+}
- if (!((fragP->fr_next == NULL)
-#ifdef OBJ_BOUT
- || (fragP->fr_next == data_frag_root)
-#endif
- || ((fragP->fr_next->fr_address - fragP->fr_address)
- == (fragP->fr_fix + (fragP->fr_offset * fragP->fr_var)))))
- {
- fprintf (stderr, "assertion failed: file `%s', line %d\n",
- __FILE__, __LINE__ - 4);
- exit (1);
- }
- } /* for each frag. */
-
-#ifndef WORKING_DOT_WORD
- {
- struct broken_word *lie;
- struct broken_word **prevP;
-
- prevP= &broken_words;
- for (lie=broken_words; lie; lie=lie->next_broken_word)
- if (!lie->added) {
-#ifdef TC_NS32K
- fix_new_ns32k(lie->frag,
- lie->word_goes_here - lie->frag->fr_literal,
- 2,
- lie->add,
- lie->sub,
- lie->addnum,
- 0, 0, 2, 0, 0);
+/* Create a fixup for an expression. Currently we only support fixups
+ for difference expressions. That is itself more than most object
+ file formats support anyhow. */
+
+fixS *
+fix_new_exp (frag, where, size, exp, pcrel, r_type)
+ fragS *frag; /* Which frag? */
+ int where; /* Where in that frag? */
+ int size; /* 1, 2, or 4 usually. */
+ expressionS *exp; /* Expression. */
+ int pcrel; /* TRUE if PC-relative relocation. */
+#ifdef BFD_ASSEMBLER
+ bfd_reloc_code_real_type r_type; /* Relocation type */
#else
-# if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE)
- fix_new( lie->frag, lie->word_goes_here - lie->frag->fr_literal,
- 2, lie->add,
- lie->sub, lie->addnum,
- 0, NO_RELOC);
-# else
- fix_new( lie->frag, lie->word_goes_here - lie->frag->fr_literal,
- 2, lie->add,
- lie->sub, lie->addnum,
- 0, 0);
-
-# endif /* tc_sparc|tc_a29k|need_fx_r_type */
-#endif /* TC_NS32K */
- /* md_number_to_chars(lie->word_goes_here,
- S_GET_VALUE(lie->add)
- + lie->addnum
- - S_GET_VALUE(lie->sub),
- 2); */
- *prevP=lie->next_broken_word;
- } else
- prevP= &(lie->next_broken_word);
-
- for (lie=broken_words;lie;) {
- struct broken_word *untruth;
- char *table_ptr;
- long table_addr;
- long from_addr,
- to_addr;
- int n,
- m;
-
- extern md_short_jump_size;
- extern md_long_jump_size;
-
- fragP=lie->dispfrag;
-
- /* Find out how many broken_words go here */
- n=0;
- for (untruth=lie;untruth && untruth->dispfrag==fragP;untruth=untruth->next_broken_word)
- if (untruth->added==1)
- n++;
-
- table_ptr=lie->dispfrag->fr_opcode;
- table_addr=lie->dispfrag->fr_address+(table_ptr - lie->dispfrag->fr_literal);
- /* Create the jump around the long jumps */
- /* This is a short jump from table_ptr+0 to table_ptr+n*long_jump_size */
- from_addr=table_addr;
- to_addr = table_addr + md_short_jump_size + n * md_long_jump_size;
- md_create_short_jump(table_ptr, from_addr, to_addr, lie->dispfrag, lie->add);
- table_ptr+=md_short_jump_size;
- table_addr+=md_short_jump_size;
-
- for (m=0;lie && lie->dispfrag==fragP;m++,lie=lie->next_broken_word) {
- if (lie->added==2)
- continue;
- /* Patch the jump table */
- /* This is the offset from ??? to table_ptr+0 */
- to_addr = table_addr
- - S_GET_VALUE(lie->sub);
- md_number_to_chars(lie->word_goes_here,to_addr,2);
- for (untruth=lie->next_broken_word;untruth && untruth->dispfrag==fragP;untruth=untruth->next_broken_word) {
- if (untruth->use_jump==lie)
- md_number_to_chars(untruth->word_goes_here,to_addr,2);
- }
-
- /* Install the long jump */
- /* this is a long jump from table_ptr+0 to the final target */
- from_addr=table_addr;
- to_addr=S_GET_VALUE(lie->add) + lie->addnum;
- md_create_long_jump(table_ptr,from_addr,to_addr,lie->dispfrag,lie->add);
- table_ptr+=md_long_jump_size;
- table_addr+=md_long_jump_size;
- }
- }
- }
-#endif /* not WORKING_DOT_WORD */
-
-#ifndef VMS
- { /* not vms */
- /*
- * Scan every FixS performing fixups. We had to wait until now to do
- * this because md_convert_frag() may have made some fixSs.
- */
-
- H_SET_RELOCATION_SIZE(&headers,
- md_reloc_size * fixup_segment(text_fix_root, SEG_TEXT),
- md_reloc_size * fixup_segment(data_fix_root, SEG_DATA));
-
-
- /* FIXME move this stuff into the pre-write-hook */
- H_SET_MAGIC_NUMBER(&headers, magic_number_for_object_file);
- H_SET_ENTRY_POINT(&headers, 0);
-
- obj_pre_write_hook(&headers); /* extra coff stuff */
- if ((had_warnings() && flagseen['Z'])
- || had_errors() > 0) {
- if (flagseen['Z']) {
- as_warn("%d error%s, %d warning%s, generating bad object file.\n",
- had_errors(), had_errors() == 1 ? "" : "s",
- had_warnings(), had_warnings() == 1 ? "" : "s");
- } else {
- as_fatal("%d error%s, %d warning%s, no object file generated.\n",
- had_errors(), had_errors() == 1 ? "" : "s",
- had_warnings(), had_warnings() == 1 ? "" : "s");
- } /* on want output */
- } /* on error condition */
-
- object_file_size = H_GET_FILE_SIZE(&headers);
- next_object_file_charP = the_object_file = xmalloc(object_file_size);
-
- output_file_create(out_file_name);
-
- obj_header_append(&next_object_file_charP, &headers);
-
- know((next_object_file_charP - the_object_file) == H_GET_HEADER_SIZE(&headers));
-
- /*
- * Emit code.
- */
- for (fragP = text_frag_root; fragP; fragP = fragP->fr_next) {
- register long count;
- register char *fill_literal;
- register long fill_size;
-
- know(fragP->fr_type == rs_fill);
- append(&next_object_file_charP, fragP->fr_literal, (unsigned long) fragP->fr_fix);
- fill_literal = fragP->fr_literal + fragP->fr_fix;
- fill_size = fragP->fr_var;
- know(fragP->fr_offset >= 0);
-
- for (count = fragP->fr_offset; count; count--) {
- append(&next_object_file_charP, fill_literal, (unsigned long) fill_size);
- } /* for each */
-
- } /* for each code frag. */
-
- know((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE(&headers) + H_GET_TEXT_SIZE(&headers) + H_GET_DATA_SIZE(&headers)));
-
- /*
- * Emit relocations.
- */
- obj_emit_relocations(&next_object_file_charP, text_fix_root, (relax_addressT)0);
- know((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE(&headers) + H_GET_TEXT_SIZE(&headers) + H_GET_DATA_SIZE(&headers) + H_GET_TEXT_RELOCATION_SIZE(&headers)));
-#ifdef TC_I960
- /* Make addresses in data relocation directives relative to beginning of
- * first data fragment, not end of last text fragment: alignment of the
- * start of the data segment may place a gap between the segments.
- */
- obj_emit_relocations(&next_object_file_charP, data_fix_root, data0_frchainP->frch_root->fr_address);
-#else /* TC_I960 */
- obj_emit_relocations(&next_object_file_charP, data_fix_root, text_last_frag->fr_address);
-#endif /* TC_I960 */
-
- know((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE(&headers) + H_GET_TEXT_SIZE(&headers) + H_GET_DATA_SIZE(&headers) + H_GET_TEXT_RELOCATION_SIZE(&headers) + H_GET_DATA_RELOCATION_SIZE(&headers)));
-
- /*
- * Emit line number entries.
- */
- OBJ_EMIT_LINENO(&next_object_file_charP, lineno_rootP, the_object_file);
- know((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE(&headers) + H_GET_TEXT_SIZE(&headers) + H_GET_DATA_SIZE(&headers) + H_GET_TEXT_RELOCATION_SIZE(&headers) + H_GET_DATA_RELOCATION_SIZE(&headers) + H_GET_LINENO_SIZE(&headers)));
-
- /*
- * Emit symbols.
- */
- obj_emit_symbols(&next_object_file_charP, symbol_rootP);
- know((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE(&headers) + H_GET_TEXT_SIZE(&headers) + H_GET_DATA_SIZE(&headers) + H_GET_TEXT_RELOCATION_SIZE(&headers) + H_GET_DATA_RELOCATION_SIZE(&headers) + H_GET_LINENO_SIZE(&headers) + H_GET_SYMBOL_TABLE_SIZE(&headers)));
-
- /*
- * Emit strings.
- */
-
- if (string_byte_count > 0) {
- obj_emit_strings(&next_object_file_charP);
- } /* only if we have a string table */
-
- /* know((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE(&headers) + H_GET_TEXT_SIZE(&headers) + H_GET_DATA_SIZE(&headers) + H_GET_TEXT_RELOCATION_SIZE(&headers) + H_GET_DATA_RELOCATION_SIZE(&headers) + H_GET_LINENO_SIZE(&headers) + H_GET_SYMBOL_TABLE_SIZE(&headers) + H_GET_STRING_SIZE(&headers)));
- */
- /* know(next_object_file_charP == the_object_file + object_file_size);*/
-
-#ifdef BFD_HEADERS
- bfd_seek(stdoutput, 0, 0);
- bfd_write(the_object_file, 1, object_file_size, stdoutput);
+ int r_type; /* Relocation type */
+#endif
+{
+ symbolS *add = NULL;
+ symbolS *sub = NULL;
+ offsetT off = 0;
+
+ switch (exp->X_op)
+ {
+ case O_absent:
+ break;
+
+ case O_add:
+ /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if
+ the difference expression cannot immediately be reduced. */
+ {
+ symbolS *stmp = make_expr_symbol (exp);
+ exp->X_op = O_symbol;
+ exp->X_op_symbol = 0;
+ exp->X_add_symbol = stmp;
+ exp->X_add_number = 0;
+ return fix_new_exp (frag, where, size, exp, pcrel, r_type);
+ }
+
+ case O_symbol_rva:
+ add = exp->X_add_symbol;
+ off = exp->X_add_number;
+
+#if defined(BFD_ASSEMBLER)
+ r_type = BFD_RELOC_RVA;
#else
-
- /* Write the data to the file */
- output_file_append(the_object_file,object_file_size,out_file_name);
-#endif
-
- output_file_close(out_file_name);
- } /* non vms output */
-#else /* VMS */
- /*
- * Now do the VMS-dependent part of writing the object file
- */
- VMS_write_object_file(text_siz, data_siz, text_frag_root, data_frag_root);
-#endif /* VMS */
-} /* write_object_file() */
+#if defined(TC_RVA_RELOC)
+ r_type = TC_RVA_RELOC;
#else
+ as_fatal(_("rva not supported"));
#endif
+#endif
+ break;
-/*
- * relax_segment()
- *
- * Now we have a segment, not a crowd of sub-segments, we can make fr_address
- * values.
- *
- * Relax the frags.
- *
- * After this, all frags in this segment have addresses that are correct
- * within the segment. Since segments live in different file addresses,
- * these frag addresses may not be the same as final object-file addresses.
- */
+ case O_uminus:
+ sub = exp->X_add_symbol;
+ off = exp->X_add_number;
+ break;
+
+ case O_subtract:
+ sub = exp->X_op_symbol;
+ /* Fall through. */
+ case O_symbol:
+ add = exp->X_add_symbol;
+ /* Fall through. */
+ case O_constant:
+ off = exp->X_add_number;
+ break;
+ default:
+ add = make_expr_symbol (exp);
+ break;
+ }
+ return fix_new_internal (frag, where, size, add, sub, off,
+ pcrel, r_type);
+}
-void relax_segment(segment_frag_root, segment)
-struct frag * segment_frag_root;
-segT segment; /* SEG_DATA or SEG_TEXT */
+/* Append a string onto another string, bumping the pointer along. */
+void
+append (charPP, fromP, length)
+ char **charPP;
+ char *fromP;
+ unsigned long length;
{
- register struct frag * fragP;
- register relax_addressT address;
- /* register relax_addressT old_address; JF unused */
- /* register relax_addressT new_address; JF unused */
-#ifndef MANY_SEGMENTS
- know(segment == SEG_DATA || segment == SEG_TEXT);
-#endif
- /* In case md_estimate_size_before_relax() wants to make fixSs. */
- subseg_change(segment, 0);
-
- /*
- * For each frag in segment: count and store (a 1st guess of) fr_address.
- */
- address = 0;
- for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) {
- fragP->fr_address = address;
- address += fragP->fr_fix;
-
- switch (fragP->fr_type) {
- case rs_fill:
- address += fragP->fr_offset * fragP->fr_var ;
- break;
-
- case rs_align:
- address += relax_align(address, fragP->fr_offset);
- break;
-
- case rs_org:
- /*
- * Assume .org is nugatory. It will grow with 1st relax.
- */
- break;
-
- case rs_machine_dependent:
- address += md_estimate_size_before_relax(fragP, segment);
- break;
-
-#ifndef WORKING_DOT_WORD
- /* Broken words don't concern us yet */
- case rs_broken_word:
- break;
-#endif
-
- default:
- BAD_CASE(fragP->fr_type);
- break;
- } /* switch(fr_type) */
- } /* for each frag in the segment */
-
- /*
- * Do relax().
- */
- {
- register long stretch; /* May be any size, 0 or negative. */
- /* Cumulative number of addresses we have */
- /* relaxed this pass. */
- /* We may have relaxed more than one address. */
- register long stretched; /* Have we stretched on this pass? */
- /* This is 'cuz stretch may be zero, when,
- in fact some piece of code grew, and
- another shrank. If a branch instruction
- doesn't fit anymore, we could be scrod */
-
- do {
- stretch = stretched = 0;
- for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next) {
- register long growth = 0;
- register unsigned long was_address;
- /* register long var; */
- register long offset;
- register symbolS *symbolP;
- register long target;
- register long after;
- register long aim;
-
- was_address = fragP->fr_address;
- address = fragP->fr_address += stretch;
- symbolP = fragP->fr_symbol;
- offset = fragP->fr_offset;
- /* var = fragP->fr_var; */
-
- switch (fragP->fr_type) {
- case rs_fill: /* .fill never relaxes. */
- growth = 0;
- break;
-
-#ifndef WORKING_DOT_WORD
- /* JF: This is RMS's idea. I do *NOT* want to be blamed
- for it I do not want to write it. I do not want to have
- anything to do with it. This is not the proper way to
- implement this misfeature. */
- case rs_broken_word: {
- struct broken_word *lie;
- struct broken_word *untruth;
- extern int md_short_jump_size;
- extern int md_long_jump_size;
-
- /* Yes this is ugly (storing the broken_word pointer
- in the symbol slot). Still, this whole chunk of
- code is ugly, and I don't feel like doing anything
- about it. Think of it as stubbornness in action */
- growth=0;
- for (lie=(struct broken_word *)(fragP->fr_symbol);
- lie && lie->dispfrag==fragP;
- lie=lie->next_broken_word) {
-
- if (lie->added)
- continue;
-
- offset= lie->add->sy_frag->fr_address+ S_GET_VALUE(lie->add) + lie->addnum -
- (lie->sub->sy_frag->fr_address+ S_GET_VALUE(lie->sub));
- if (offset<=-32768 || offset>=32767) {
- if (flagseen['K'])
- as_warn(".word %s-%s+%ld didn't fit",
- S_GET_NAME(lie->add),
- S_GET_NAME(lie->sub),
- lie->addnum);
- lie->added=1;
- if (fragP->fr_subtype==0) {
- fragP->fr_subtype++;
- growth+=md_short_jump_size;
- }
- for (untruth=lie->next_broken_word;untruth && untruth->dispfrag==lie->dispfrag;untruth=untruth->next_broken_word)
- if ((untruth->add->sy_frag == lie->add->sy_frag)
- && S_GET_VALUE(untruth->add) == S_GET_VALUE(lie->add)) {
- untruth->added=2;
- untruth->use_jump=lie;
- }
- growth+=md_long_jump_size;
- }
- }
-
- break;
- } /* case rs_broken_word */
-#endif
- case rs_align:
- growth = relax_align((relax_addressT) (address + fragP->fr_fix), offset)
- - relax_align((relax_addressT) (was_address + fragP->fr_fix), offset);
- break;
-
- case rs_org:
- target = offset;
-
- if (symbolP) {
-#ifdef MANY_SEGMENTS
-#else
- know((S_GET_SEGMENT(symbolP) == SEG_ABSOLUTE) || (S_GET_SEGMENT(symbolP) == SEG_DATA) || (S_GET_SEGMENT(symbolP) == SEG_TEXT));
- know(symbolP->sy_frag);
- know(!(S_GET_SEGMENT(symbolP) == SEG_ABSOLUTE) || (symbolP->sy_frag == &zero_address_frag));
-#endif
- target += S_GET_VALUE(symbolP)
- + symbolP->sy_frag->fr_address;
- } /* if we have a symbol */
-
- know(fragP->fr_next);
- after = fragP->fr_next->fr_address;
- growth = ((target - after ) > 0) ? (target - after) : 0;
- /* Growth may be -ve, but variable part */
- /* of frag cannot have < 0 chars. */
- /* That is, we can't .org backwards. */
-
- growth -= stretch; /* This is an absolute growth factor */
- break;
-
- case rs_machine_dependent: {
- register const relax_typeS * this_type;
- register const relax_typeS * start_type;
- register relax_substateT next_state;
- register relax_substateT this_state;
-
- start_type = this_type = md_relax_table + (this_state = fragP->fr_subtype);
- target = offset;
-
- if (symbolP) {
-#ifndef MANY_SEGMENTS
- know((S_GET_SEGMENT(symbolP) == SEG_ABSOLUTE) || (S_GET_SEGMENT(symbolP) == SEG_DATA) || (S_GET_SEGMENT(symbolP) == SEG_TEXT));
-#endif
- know(symbolP->sy_frag);
- know(!(S_GET_SEGMENT(symbolP) == SEG_ABSOLUTE) || symbolP->sy_frag==&zero_address_frag );
- target +=
- S_GET_VALUE(symbolP)
- + symbolP->sy_frag->fr_address;
-
- /* If frag has yet to be reached on this pass,
- assume it will move by STRETCH just as we did.
- If this is not so, it will be because some frag
- between grows, and that will force another pass. */
-
- /* JF was just address */
- /* JF also added is_dnrange hack */
- /* There's gotta be a better/faster/etc way
- to do this. . . */
- /* gnu@cygnus.com: I changed this from > to >=
- because I ran into a zero-length frag (fr_fix=0)
- which was created when the obstack needed a new
- chunk JUST AFTER the opcode of a branch. Since
- fr_fix is zero, fr_address of this frag is the same
- as fr_address of the next frag. This
- zero-length frag was variable and jumped to .+2
- (in the next frag), but since the > comparison
- below failed (the two were =, not >), "stretch"
- was not added to the target. Stretch was 178, so
- the offset appeared to be .-176 instead, which did
- not fit into a byte branch, so the assembler
- relaxed the branch to a word. This didn't compare
- with what happened when the same source file was
- assembled on other machines, which is how I found it.
- You might want to think about what other places have
- trouble with zero length frags... */
-
- if (symbolP->sy_frag->fr_address >= was_address
- && is_dnrange(fragP,symbolP->sy_frag)) {
- target += stretch;
- } /* */
-
- } /* if there's a symbol attached */
-
- aim = target - address - fragP->fr_fix;
- /* The displacement is affected by the instruction size
- * for the 32k architecture. I think we ought to be able
- * to add fragP->fr_pcrel_adjust in all cases (it should be
- * zero if not used), but just in case it breaks something
- * else we'll put this inside #ifdef NS32K ... #endif
- */
-#ifdef TC_NS32K
- aim += fragP->fr_pcrel_adjust;
-#endif /* TC_NS32K */
-
- if (aim < 0) {
- /* Look backwards. */
- for (next_state = this_type->rlx_more; next_state; ) {
- if (aim >= this_type->rlx_backward) {
- next_state = 0;
- } else { /* Grow to next state. */
- this_type = md_relax_table + (this_state = next_state);
- next_state = this_type->rlx_more;
- }
- }
- } else {
-#ifdef DONTDEF
- /* JF these next few lines of code are for the mc68020 which can't handle short
- offsets of zero in branch instructions. What a kludge! */
- if (aim==0 && this_state==(1<<2+0)) { /* FOO hard encoded from m.c */
- aim=this_type->rlx_forward+1; /* Force relaxation into word mode */
- }
-#endif
-#ifdef M68K_AIM_KLUDGE
- M68K_AIM_KLUDGE(aim, this_state, this_type);
-#endif
- /* JF end of 68020 code */
- /* Look forwards. */
- for (next_state = this_type->rlx_more; next_state; ) {
- if (aim <= this_type->rlx_forward) {
- next_state = 0;
- } else { /* Grow to next state. */
- this_type = md_relax_table + (this_state = next_state);
- next_state = this_type->rlx_more;
- }
- }
- }
-
- if ((growth = this_type->rlx_length - start_type->rlx_length) != 0)
- fragP->fr_subtype = this_state;
-
- break;
- } /* case rs_machine_dependent */
-
- default:
- BAD_CASE( fragP->fr_type );
- break;
- }
- if (growth) {
- stretch += growth;
- stretched++;
- }
- } /* For each frag in the segment. */
- } while (stretched); /* Until nothing further to relax. */
- } /* do_relax */
-
- /*
- * We now have valid fr_address'es for each frag.
- */
-
- /*
- * All fr_address's are correct, relative to their own segment.
- * We have made all the fixS we will ever make.
- */
-} /* relax_segment() */
+ /* Don't trust memcpy() of 0 chars. */
+ if (length == 0)
+ return;
+
+ memcpy (*charPP, fromP, length);
+ *charPP += length;
+}
+
+#ifndef BFD_ASSEMBLER
+int section_alignment[SEG_MAXIMUM_ORDINAL];
+#endif
/*
- * Relax_align. Advance location counter to next address that has 'alignment'
- * lowest order bits all 0s.
+ * This routine records the largest alignment seen for each segment.
+ * If the beginning of the segment is aligned on the worst-case
+ * boundary, all of the other alignments within it will work. At
+ * least one object format really uses this info.
*/
+void
+record_alignment (seg, align)
+ /* Segment to which alignment pertains */
+ segT seg;
+ /* Alignment, as a power of 2 (e.g., 1 => 2-byte boundary, 2 => 4-byte
+ boundary, etc.) */
+ int align;
+{
+ if (seg == absolute_section)
+ return;
+#ifdef BFD_ASSEMBLER
+ if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg))
+ bfd_set_section_alignment (stdoutput, seg, align);
+#else
+ if (align > section_alignment[(int) seg])
+ section_alignment[(int) seg] = align;
+#endif
+}
+
+#ifdef BFD_ASSEMBLER
+
+/* Reset the section indices after removing the gas created sections. */
-/* How many addresses does the .align take? */
-static relax_addressT relax_align(address, alignment)
-register relax_addressT address; /* Address now. */
-register long alignment; /* Alignment (binary). */
+static void
+renumber_sections (abfd, sec, countparg)
+ bfd *abfd;
+ asection *sec;
+ PTR countparg;
{
- relax_addressT mask;
- relax_addressT new_address;
-
- mask = ~ ( (~0) << alignment );
- new_address = (address + mask) & (~ mask);
- return (new_address - address);
-} /* relax_align() */
+ int *countp = (int *) countparg;
-/* fixup_segment()
-
- Go through all the fixS's in a segment and see which ones can be
- handled now. (These consist of fixS where we have since discovered
- the value of a symbol, or the address of the frag involved.)
- For each one, call md_apply_fix to put the fix into the frag data.
-
- Result is a count of how many relocation structs will be needed to
- handle the remaining fixS's that we couldn't completely handle here.
- These will be output later by emit_relocations(). */
+ sec->index = *countp;
+ ++*countp;
+}
+
+#endif /* defined (BFD_ASSEMBLER) */
+
+#if defined (BFD_ASSEMBLER) || ! defined (BFD)
-static long fixup_segment(fixP, this_segment_type)
-register fixS * fixP;
-segT this_segment_type; /* N_TYPE bits for segment. */
+static fragS *
+chain_frchains_together_1 (section, frchp)
+ segT section;
+ struct frchain *frchp;
{
- register long seg_reloc_count;
- register symbolS *add_symbolP;
- register symbolS *sub_symbolP;
- register long add_number;
- register int size;
- register char *place;
- register long where;
- register char pcrel;
- register fragS *fragP;
- register segT add_symbol_segment = SEG_ABSOLUTE;
-
- /* FIXME: remove this line */ /* fixS *orig = fixP; */
- seg_reloc_count = 0;
-
- for ( ; fixP; fixP = fixP->fx_next) {
- fragP = fixP->fx_frag;
- know(fragP);
- where = fixP->fx_where;
- place = fragP->fr_literal + where;
- size = fixP->fx_size;
- add_symbolP = fixP->fx_addsy;
-#ifdef TC_I960
- if (fixP->fx_callj && TC_S_IS_CALLNAME(add_symbolP)) {
- /* Relocation should be done via the
- associated 'bal' entry point
- symbol. */
-
- if (!TC_S_IS_BALNAME(tc_get_bal_of_call(add_symbolP))) {
- as_bad("No 'bal' entry point for leafproc %s",
- S_GET_NAME(add_symbolP));
- continue;
- }
- fixP->fx_addsy = add_symbolP = tc_get_bal_of_call(add_symbolP);
- } /* callj relocation */
-#endif
- sub_symbolP = fixP->fx_subsy;
- add_number = fixP->fx_offset;
- pcrel = fixP->fx_pcrel;
-
- if (add_symbolP) {
- add_symbol_segment = S_GET_SEGMENT(add_symbolP);
- } /* if there is an addend */
-
- if (sub_symbolP) {
- if (!add_symbolP) {
- /* Its just -sym */
- if (S_GET_SEGMENT(sub_symbolP) != SEG_ABSOLUTE) {
- as_bad("Negative of non-absolute symbol %s", S_GET_NAME(sub_symbolP));
- } /* not absolute */
-
- add_number -= S_GET_VALUE(sub_symbolP);
-
- /* if sub_symbol is in the same segment that add_symbol
- and add_symbol is either in DATA, TEXT, BSS or ABSOLUTE */
- } else if ((S_GET_SEGMENT(sub_symbolP) == add_symbol_segment)
- && (SEG_NORMAL(add_symbol_segment)
- || (add_symbol_segment == SEG_ABSOLUTE))) {
- /* Difference of 2 symbols from same segment. */
- /* Can't make difference of 2 undefineds: 'value' means */
- /* something different for N_UNDF. */
-#ifdef TC_I960
- /* Makes no sense to use the difference of 2 arbitrary symbols
- * as the target of a call instruction.
- */
- if (fixP->fx_callj) {
- as_bad("callj to difference of 2 symbols");
- }
-#endif /* TC_I960 */
- add_number += S_GET_VALUE(add_symbolP) -
- S_GET_VALUE(sub_symbolP);
-
- add_symbolP = NULL;
- fixP->fx_addsy = NULL;
- } else {
- /* Different segments in subtraction. */
- know(!(S_IS_EXTERNAL(sub_symbolP) && (S_GET_SEGMENT(sub_symbolP) == SEG_ABSOLUTE)));
-
- if ((S_GET_SEGMENT(sub_symbolP) == SEG_ABSOLUTE)) {
- add_number -= S_GET_VALUE(sub_symbolP);
- } else {
- as_bad("Can't emit reloc {- %s-seg symbol \"%s\"} @ file address %d.",
- segment_name(S_GET_SEGMENT(sub_symbolP)),
- S_GET_NAME(sub_symbolP), fragP->fr_address + where);
- } /* if absolute */
- }
- } /* if sub_symbolP */
-
- if (add_symbolP) {
- if (add_symbol_segment == this_segment_type && pcrel) {
- /*
- * This fixup was made when the symbol's segment was
- * SEG_UNKNOWN, but it is now in the local segment.
- * So we know how to do the address without relocation.
- */
-#ifdef TC_I960
- /* reloc_callj() may replace a 'call' with a 'calls' or a 'bal',
- * in which cases it modifies *fixP as appropriate. In the case
- * of a 'calls', no further work is required, and *fixP has been
- * set up to make the rest of the code below a no-op.
- */
- reloc_callj(fixP);
-#endif /* TC_I960 */
-
- add_number += S_GET_VALUE(add_symbolP);
- add_number -= md_pcrel_from (fixP);
- pcrel = 0; /* Lie. Don't want further pcrel processing. */
- fixP->fx_addsy = NULL; /* No relocations please. */
- } else {
- switch (add_symbol_segment) {
- case SEG_ABSOLUTE:
-#ifdef TC_I960
- reloc_callj(fixP); /* See comment about reloc_callj() above*/
-#endif /* TC_I960 */
- add_number += S_GET_VALUE(add_symbolP);
- fixP->fx_addsy = NULL;
- add_symbolP = NULL;
- break;
- default:
- seg_reloc_count ++;
- add_number += S_GET_VALUE(add_symbolP);
- break;
-
- case SEG_UNKNOWN:
-#ifdef TC_I960
- if ((int)fixP->fx_bit_fixP == 13) {
- /* This is a COBR instruction. They have only a
- * 13-bit displacement and are only to be used
- * for local branches: flag as error, don't generate
- * relocation.
- */
- as_bad("can't use COBR format with external label");
- fixP->fx_addsy = NULL; /* No relocations please. */
- continue;
- } /* COBR */
-#endif /* TC_I960 */
+ fragS dummy, *prev_frag = &dummy;
+#ifdef BFD_ASSEMBLER
+ fixS fix_dummy, *prev_fix = &fix_dummy;
+#endif
-#ifdef OBJ_COFF
-#ifdef TE_I386AIX
- if (S_IS_COMMON(add_symbolP))
- add_number += S_GET_VALUE(add_symbolP);
-#endif /* TE_I386AIX */
-#endif /* OBJ_COFF */
- ++seg_reloc_count;
-
- break;
-
-
- } /* switch on symbol seg */
- } /* if not in local seg */
- } /* if there was a + symbol */
-
- if (pcrel) {
- add_number -= md_pcrel_from(fixP);
- if (add_symbolP == 0) {
- fixP->fx_addsy = & abs_symbol;
- ++seg_reloc_count;
- } /* if there's an add_symbol */
- } /* if pcrel */
-
- if (!fixP->fx_bit_fixP) {
- if ((size==1 &&
- (add_number& ~0xFF) && (add_number&~0xFF!=(-1&~0xFF))) ||
- (size==2 &&
- (add_number& ~0xFFFF) && (add_number&~0xFFFF!=(-1&~0xFFFF)))) {
- as_bad("Value of %d too large for field of %d bytes at 0x%x",
- add_number, size, fragP->fr_address + where);
- } /* generic error checking */
- } /* not a bit fix */
-
- md_apply_fix(fixP, add_number);
- } /* For each fixS in this segment. */
-
-#ifdef OBJ_COFF
-#ifdef TC_I960
+ for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next)
+ {
+ prev_frag->fr_next = frchp->frch_root;
+ prev_frag = frchp->frch_last;
+ assert (prev_frag->fr_type != 0);
+#ifdef BFD_ASSEMBLER
+ if (frchp->fix_root != (fixS *) NULL)
{
- fixS *topP = fixP;
-
- /* two relocs per callj under coff. */
- for (fixP = topP; fixP; fixP = fixP->fx_next) {
- if (fixP->fx_callj && fixP->fx_addsy != 0) {
- ++seg_reloc_count;
- } /* if callj and not already fixed. */
- } /* for each fix */
+ if (seg_info (section)->fix_root == (fixS *) NULL)
+ seg_info (section)->fix_root = frchp->fix_root;
+ prev_fix->fx_next = frchp->fix_root;
+ seg_info (section)->fix_tail = frchp->fix_tail;
+ prev_fix = frchp->fix_tail;
}
-#endif /* TC_I960 */
-
-#endif /* OBJ_COFF */
- return(seg_reloc_count);
-} /* fixup_segment() */
+#endif
+ }
+ assert (prev_frag->fr_type != 0);
+ prev_frag->fr_next = 0;
+ return prev_frag;
+}
+
+#endif
+#ifdef BFD_ASSEMBLER
-static int is_dnrange(f1,f2)
-struct frag *f1;
-struct frag *f2;
+static void
+chain_frchains_together (abfd, section, xxx)
+ bfd *abfd; /* unused */
+ segT section;
+ PTR xxx; /* unused */
{
- while (f1) {
- if (f1->fr_next==f2)
- return 1;
- f1=f1->fr_next;
- }
- return 0;
-} /* is_dnrange() */
+ segment_info_type *info;
-/* Append a string onto another string, bumping the pointer along. */
-void
- append (charPP, fromP, length)
-char **charPP;
-char *fromP;
-unsigned long length;
+ /* BFD may have introduced its own sections without using
+ subseg_new, so it is possible that seg_info is NULL. */
+ info = seg_info (section);
+ if (info != (segment_info_type *) NULL)
+ info->frchainP->frch_last
+ = chain_frchains_together_1 (section, info->frchainP);
+
+ /* Now that we've chained the frags together, we must add new fixups
+ to the segment, not to the frag chain. */
+ frags_chained = 1;
+}
+
+#endif
+
+#if !defined (BFD) && !defined (BFD_ASSEMBLER)
+
+static void
+remove_subsegs (head, seg, root, last)
+ frchainS *head;
+ int seg;
+ fragS **root;
+ fragS **last;
+{
+ *root = head->frch_root;
+ *last = chain_frchains_together_1 (seg, head);
+}
+
+#endif /* BFD */
+
+#if defined (BFD_ASSEMBLER) || !defined (BFD)
+
+#ifdef BFD_ASSEMBLER
+static void
+cvt_frag_to_fill (sec, fragP)
+ segT sec;
+ fragS *fragP;
+#else
+static void
+cvt_frag_to_fill (headersP, sec, fragP)
+ object_headers *headersP;
+ segT sec;
+ fragS *fragP;
+#endif
{
- if (length) { /* Don't trust memcpy() of 0 chars. */
- memcpy(*charPP, fromP, (int) length);
- *charPP += length;
+ switch (fragP->fr_type)
+ {
+ case rs_align:
+ case rs_align_code:
+ case rs_org:
+ case rs_space:
+#ifdef HANDLE_ALIGN
+ HANDLE_ALIGN (fragP);
+#endif
+ know (fragP->fr_next != NULL);
+ fragP->fr_offset = (fragP->fr_next->fr_address
+ - fragP->fr_address
+ - fragP->fr_fix) / fragP->fr_var;
+ if (fragP->fr_offset < 0)
+ {
+ as_bad (_("attempt to .org/.space backwards? (%ld)"),
+ (long) fragP->fr_offset);
}
+ fragP->fr_type = rs_fill;
+ break;
+
+ case rs_fill:
+ break;
+
+ case rs_leb128:
+ {
+ valueT value = S_GET_VALUE (fragP->fr_symbol);
+ int size;
+
+ size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value,
+ fragP->fr_subtype);
+
+ fragP->fr_fix += size;
+ fragP->fr_type = rs_fill;
+ fragP->fr_var = 0;
+ fragP->fr_offset = 0;
+ fragP->fr_symbol = NULL;
+ }
+ break;
+
+ case rs_cfa:
+ eh_frame_convert_frag (fragP);
+ break;
+
+ case rs_machine_dependent:
+#ifdef BFD_ASSEMBLER
+ md_convert_frag (stdoutput, sec, fragP);
+#else
+ md_convert_frag (headersP, sec, fragP);
+#endif
+
+ assert (fragP->fr_next == NULL
+ || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address)
+ == fragP->fr_fix));
+
+ /*
+ * After md_convert_frag, we make the frag into a ".space 0".
+ * Md_convert_frag() should set up any fixSs and constants
+ * required.
+ */
+ frag_wane (fragP);
+ break;
+
+#ifndef WORKING_DOT_WORD
+ case rs_broken_word:
+ {
+ struct broken_word *lie;
+
+ if (fragP->fr_subtype)
+ {
+ fragP->fr_fix += md_short_jump_size;
+ for (lie = (struct broken_word *) (fragP->fr_symbol);
+ lie && lie->dispfrag == fragP;
+ lie = lie->next_broken_word)
+ if (lie->added == 1)
+ fragP->fr_fix += md_long_jump_size;
+ }
+ frag_wane (fragP);
+ }
+ break;
+#endif
+
+ default:
+ BAD_CASE (fragP->fr_type);
+ break;
+ }
}
-int section_alignment[SEG_MAXIMUM_ORDINAL];
+#endif /* defined (BFD_ASSEMBLER) || !defined (BFD) */
-/*
- * This routine records the largest alignment seen for each segment.
- * If the beginning of the segment is aligned on the worst-case
- * boundary, all of the other alignments within it will work. At
- * least one object format really uses this info.
- */
-void record_alignment(seg, align)
-segT seg; /* Segment to which alignment pertains */
-int align; /* Alignment, as a power of 2
- * (e.g., 1 => 2-byte boundary, 2 => 4-byte boundary, etc.)
- */
+#ifdef BFD_ASSEMBLER
+static void
+relax_and_size_seg (abfd, sec, xxx)
+ bfd *abfd;
+ asection *sec;
+ PTR xxx;
{
-
- if ( align > section_alignment[(int) seg] ){
- section_alignment[(int) seg] = align;
- } /* if highest yet */
-
- return;
-} /* record_alignment() */
+ flagword flags;
+ fragS *fragp;
+ segment_info_type *seginfo;
+ int x;
+ valueT size, newsize;
-/*
- * Local Variables:
- * comment-column: 0
- * fill-column: 131
- * End:
- */
+ subseg_change (sec, 0);
+
+ flags = bfd_get_section_flags (abfd, sec);
+
+ seginfo = seg_info (sec);
+ if (seginfo && seginfo->frchainP)
+ {
+ relax_segment (seginfo->frchainP->frch_root, sec);
+ for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next)
+ cvt_frag_to_fill (sec, fragp);
+ for (fragp = seginfo->frchainP->frch_root;
+ fragp->fr_next;
+ fragp = fragp->fr_next)
+ /* walk to last elt */;
+ size = fragp->fr_address + fragp->fr_fix;
+ }
+ else
+ size = 0;
+
+ if (size > 0 && ! seginfo->bss)
+ flags |= SEC_HAS_CONTENTS;
+
+ /* @@ This is just an approximation. */
+ if (seginfo && seginfo->fix_root)
+ flags |= SEC_RELOC;
+ else
+ flags &= ~SEC_RELOC;
+ x = bfd_set_section_flags (abfd, sec, flags);
+ assert (x == true);
+
+ newsize = md_section_align (sec, size);
+ x = bfd_set_section_size (abfd, sec, newsize);
+ assert (x == true);
+
+ /* If the size had to be rounded up, add some padding in the last
+ non-empty frag. */
+ assert (newsize >= size);
+ if (size != newsize)
+ {
+ fragS *last = seginfo->frchainP->frch_last;
+ fragp = seginfo->frchainP->frch_root;
+ while (fragp->fr_next != last)
+ fragp = fragp->fr_next;
+ last->fr_address = size;
+ fragp->fr_offset += newsize - size;
+ }
+
+#ifdef tc_frob_section
+ tc_frob_section (sec);
+#endif
+#ifdef obj_frob_section
+ obj_frob_section (sec);
+#endif
+}
+
+#ifdef DEBUG2
+static void
+dump_section_relocs (abfd, sec, stream_)
+ bfd *abfd;
+ asection *sec;
+ char *stream_;
+{
+ FILE *stream = (FILE *) stream_;
+ segment_info_type *seginfo = seg_info (sec);
+ fixS *fixp = seginfo->fix_root;
+
+ if (!fixp)
+ return;
+
+ fprintf (stream, "sec %s relocs:\n", sec->name);
+ while (fixp)
+ {
+ symbolS *s = fixp->fx_addsy;
+ if (s)
+ {
+ fprintf (stream, " %08x: %s(%s", fixp, S_GET_NAME (s),
+ s->bsym->section->name);
+ if (s->bsym->flags & BSF_SECTION_SYM)
+ {
+ fprintf (stream, " section sym");
+ if (S_GET_VALUE (s))
+ fprintf (stream, "+%x", S_GET_VALUE (s));
+ }
+ else
+ fprintf (stream, "+%x", S_GET_VALUE (s));
+ fprintf (stream, ")+%x\n", fixp->fx_offset);
+ }
+ else
+ fprintf (stream, " %08x: type %d no sym\n", fixp, fixp->fx_r_type);
+ fixp = fixp->fx_next;
+ }
+}
+#else
+#define dump_section_relocs(ABFD,SEC,STREAM) ((void) 0)
+#endif
+
+#ifndef EMIT_SECTION_SYMBOLS
+#define EMIT_SECTION_SYMBOLS 1
+#endif
+
+static void
+adjust_reloc_syms (abfd, sec, xxx)
+ bfd *abfd;
+ asection *sec;
+ PTR xxx;
+{
+ segment_info_type *seginfo = seg_info (sec);
+ fixS *fixp;
+
+ if (seginfo == NULL)
+ return;
+
+ dump_section_relocs (abfd, sec, stderr);
+
+ for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
+ if (fixp->fx_done)
+ /* ignore it */;
+ else if (fixp->fx_addsy)
+ {
+ symbolS *sym;
+ asection *symsec;
+
+#ifdef DEBUG5
+ fprintf (stderr, "\n\nadjusting fixup:\n");
+ print_fixup (fixp);
+#endif
+
+ sym = fixp->fx_addsy;
+
+ /* All symbols should have already been resolved at this
+ point. It is possible to see unresolved expression
+ symbols, though, since they are not in the regular symbol
+ table. */
+ if (sym != NULL)
+ resolve_symbol_value (sym, 1);
+
+ if (fixp->fx_subsy != NULL)
+ resolve_symbol_value (fixp->fx_subsy, 1);
+
+ /* If this symbol is equated to an undefined symbol, convert
+ the fixup to being against that symbol. */
+ if (sym != NULL && symbol_equated_p (sym)
+ && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym)))
+ {
+ fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
+ sym = symbol_get_value_expression (sym)->X_add_symbol;
+ fixp->fx_addsy = sym;
+ }
+
+ if (sym != NULL && symbol_mri_common_p (sym))
+ {
+ /* These symbols are handled specially in fixup_segment. */
+ goto done;
+ }
+
+ symsec = S_GET_SEGMENT (sym);
+
+ if (symsec == NULL)
+ abort ();
+
+ if (bfd_is_abs_section (symsec))
+ {
+ /* The fixup_segment routine will not use this symbol in a
+ relocation unless TC_FORCE_RELOCATION returns 1. */
+ if (TC_FORCE_RELOCATION (fixp))
+ {
+ symbol_mark_used_in_reloc (fixp->fx_addsy);
+#ifdef UNDEFINED_DIFFERENCE_OK
+ if (fixp->fx_subsy != NULL)
+ symbol_mark_used_in_reloc (fixp->fx_subsy);
+#endif
+ }
+ goto done;
+ }
+
+ /* If it's one of these sections, assume the symbol is
+ definitely going to be output. The code in
+ md_estimate_size_before_relax in tc-mips.c uses this test
+ as well, so if you change this code you should look at that
+ code. */
+ if (bfd_is_und_section (symsec)
+ || bfd_is_com_section (symsec))
+ {
+ symbol_mark_used_in_reloc (fixp->fx_addsy);
+#ifdef UNDEFINED_DIFFERENCE_OK
+ /* We have the difference of an undefined symbol and some
+ other symbol. Make sure to mark the other symbol as used
+ in a relocation so that it will always be output. */
+ if (fixp->fx_subsy)
+ symbol_mark_used_in_reloc (fixp->fx_subsy);
+#endif
+ goto done;
+ }
+
+ /* Don't try to reduce relocs which refer to non-local symbols
+ in .linkonce sections. It can lead to confusion when a
+ debugging section refers to a .linkonce section. I hope
+ this will always be correct. */
+ if (symsec != sec && ! S_IS_LOCAL (sym))
+ {
+ boolean linkonce;
+
+ linkonce = false;
+#ifdef BFD_ASSEMBLER
+ if ((bfd_get_section_flags (stdoutput, symsec) & SEC_LINK_ONCE)
+ != 0)
+ linkonce = true;
+#endif
+#ifdef OBJ_ELF
+ /* The GNU toolchain uses an extension for ELF: a section
+ beginning with the magic string .gnu.linkonce is a
+ linkonce section. */
+ if (strncmp (segment_name (symsec), ".gnu.linkonce",
+ sizeof ".gnu.linkonce" - 1) == 0)
+ linkonce = true;
+#endif
+
+ if (linkonce)
+ {
+ symbol_mark_used_in_reloc (fixp->fx_addsy);
+#ifdef UNDEFINED_DIFFERENCE_OK
+ if (fixp->fx_subsy != NULL)
+ symbol_mark_used_in_reloc (fixp->fx_subsy);
+#endif
+ goto done;
+ }
+ }
+
+ /* Since we're reducing to section symbols, don't attempt to reduce
+ anything that's already using one. */
+ if (symbol_section_p (sym))
+ {
+ symbol_mark_used_in_reloc (fixp->fx_addsy);
+ goto done;
+ }
+
+#ifdef BFD_ASSEMBLER
+ /* We can never adjust a reloc against a weak symbol. If we
+ did, and the weak symbol was overridden by a real symbol
+ somewhere else, then our relocation would be pointing at
+ the wrong area of memory. */
+ if (S_IS_WEAK (sym))
+ {
+ symbol_mark_used_in_reloc (fixp->fx_addsy);
+ goto done;
+ }
+#endif
+
+ /* Is there some other reason we can't adjust this one? (E.g.,
+ call/bal links in i960-bout symbols.) */
+#ifdef obj_fix_adjustable
+ if (! obj_fix_adjustable (fixp))
+ {
+ symbol_mark_used_in_reloc (fixp->fx_addsy);
+ goto done;
+ }
+#endif
+
+ /* Is there some other (target cpu dependent) reason we can't adjust
+ this one? (E.g. relocations involving function addresses on
+ the PA. */
+#ifdef tc_fix_adjustable
+ if (! tc_fix_adjustable (fixp))
+ {
+ symbol_mark_used_in_reloc (fixp->fx_addsy);
+ goto done;
+ }
+#endif
+
+ /* If the section symbol isn't going to be output, the relocs
+ at least should still work. If not, figure out what to do
+ when we run into that case.
+
+ We refetch the segment when calling section_symbol, rather
+ than using symsec, because S_GET_VALUE may wind up changing
+ the section when it calls resolve_symbol_value. */
+ fixp->fx_offset += S_GET_VALUE (sym);
+ fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym));
+ symbol_mark_used_in_reloc (fixp->fx_addsy);
+
+ done:
+ ;
+ }
+#if 1/*def RELOC_REQUIRES_SYMBOL*/
+ else
+ {
+ /* There was no symbol required by this relocation. However,
+ BFD doesn't really handle relocations without symbols well.
+ (At least, the COFF support doesn't.) So for now we fake up
+ a local symbol in the absolute section. */
+
+ fixp->fx_addsy = section_symbol (absolute_section);
+/* fixp->fx_addsy->sy_used_in_reloc = 1; */
+ }
+#endif
+
+ dump_section_relocs (abfd, sec, stderr);
+}
+
+static void
+write_relocs (abfd, sec, xxx)
+ bfd *abfd;
+ asection *sec;
+ PTR xxx;
+{
+ segment_info_type *seginfo = seg_info (sec);
+ int i;
+ unsigned int n;
+ arelent **relocs;
+ fixS *fixp;
+ char *err;
+
+ /* If seginfo is NULL, we did not create this section; don't do
+ anything with it. */
+ if (seginfo == NULL)
+ return;
+
+ fixup_segment (seginfo->fix_root, sec);
+
+ n = 0;
+ for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
+ n++;
+
+#ifndef RELOC_EXPANSION_POSSIBLE
+ /* Set up reloc information as well. */
+ relocs = (arelent **) xmalloc (n * sizeof (arelent *));
+ memset ((char*)relocs, 0, n * sizeof (arelent*));
+
+ i = 0;
+ for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
+ {
+ arelent *reloc;
+ bfd_reloc_status_type s;
+ symbolS *sym;
+
+ if (fixp->fx_done)
+ {
+ n--;
+ continue;
+ }
+
+ /* If this is an undefined symbol which was equated to another
+ symbol, then use generate the reloc against the latter symbol
+ rather than the former. */
+ sym = fixp->fx_addsy;
+ while (symbol_equated_p (sym)
+ && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym)))
+ {
+ symbolS *n;
+
+ /* We must avoid looping, as that can occur with a badly
+ written program. */
+ n = symbol_get_value_expression (sym)->X_add_symbol;
+ if (n == sym)
+ break;
+ fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
+ sym = n;
+ }
+ fixp->fx_addsy = sym;
+
+ reloc = tc_gen_reloc (sec, fixp);
+ if (!reloc)
+ {
+ n--;
+ continue;
+ }
+
+#if 0
+ /* This test is triggered inappropriately for the SH. */
+ if (fixp->fx_where + fixp->fx_size
+ > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
+ abort ();
+#endif
+
+ s = bfd_install_relocation (stdoutput, reloc,
+ fixp->fx_frag->fr_literal,
+ fixp->fx_frag->fr_address,
+ sec, &err);
+ switch (s)
+ {
+ case bfd_reloc_ok:
+ break;
+ case bfd_reloc_overflow:
+ as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation overflow"));
+ break;
+ case bfd_reloc_outofrange:
+ as_bad_where (fixp->fx_file, fixp->fx_line, _("relocation out of range"));
+ break;
+ default:
+ as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x"),
+ fixp->fx_file, fixp->fx_line, s);
+ }
+ relocs[i++] = reloc;
+ }
+#else
+ n = n * MAX_RELOC_EXPANSION;
+ /* Set up reloc information as well. */
+ relocs = (arelent **) xmalloc (n * sizeof (arelent *));
+
+ i = 0;
+ for (fixp = seginfo->fix_root; fixp != (fixS *) NULL; fixp = fixp->fx_next)
+ {
+ arelent **reloc;
+ char *data;
+ bfd_reloc_status_type s;
+ symbolS *sym;
+ int j;
+
+ if (fixp->fx_done)
+ {
+ n--;
+ continue;
+ }
+
+ /* If this is an undefined symbol which was equated to another
+ symbol, then use generate the reloc against the latter symbol
+ rather than the former. */
+ sym = fixp->fx_addsy;
+ while (symbol_equated_p (sym)
+ && (! S_IS_DEFINED (sym) || S_IS_COMMON (sym)))
+ sym = symbol_get_value_expression (sym)->X_add_symbol;
+ fixp->fx_addsy = sym;
+
+ reloc = tc_gen_reloc (sec, fixp);
+
+ for (j = 0; reloc[j]; j++)
+ {
+ relocs[i++] = reloc[j];
+ assert(i <= n);
+ }
+ data = fixp->fx_frag->fr_literal + fixp->fx_where;
+ if (fixp->fx_where + fixp->fx_size
+ > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
+ as_bad_where (fixp->fx_file, fixp->fx_line,
+ _("internal error: fixup not contained within frag"));
+ for (j = 0; reloc[j]; j++)
+ {
+ s = bfd_install_relocation (stdoutput, reloc[j],
+ fixp->fx_frag->fr_literal,
+ fixp->fx_frag->fr_address,
+ sec, &err);
+ switch (s)
+ {
+ case bfd_reloc_ok:
+ break;
+ case bfd_reloc_overflow:
+ as_bad_where (fixp->fx_file, fixp->fx_line,
+ _("relocation overflow"));
+ break;
+ default:
+ as_fatal (_("%s:%u: bad return from bfd_install_relocation"),
+ fixp->fx_file, fixp->fx_line);
+ }
+ }
+ }
+ n = i;
+#endif
+
+#ifdef DEBUG4
+ {
+ int i, j, nsyms;
+ asymbol **sympp;
+ sympp = bfd_get_outsymbols (stdoutput);
+ nsyms = bfd_get_symcount (stdoutput);
+ for (i = 0; i < n; i++)
+ if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0)
+ {
+ for (j = 0; j < nsyms; j++)
+ if (sympp[j] == *relocs[i]->sym_ptr_ptr)
+ break;
+ if (j == nsyms)
+ abort ();
+ }
+ }
+#endif
+
+ if (n)
+ bfd_set_reloc (stdoutput, sec, relocs, n);
+ else
+ bfd_set_section_flags (abfd, sec,
+ (bfd_get_section_flags (abfd, sec)
+ & (flagword) ~SEC_RELOC));
+
+#ifdef DEBUG3
+ {
+ int i;
+ arelent *r;
+ asymbol *s;
+ fprintf (stderr, "relocs for sec %s\n", sec->name);
+ for (i = 0; i < n; i++)
+ {
+ r = relocs[i];
+ s = *r->sym_ptr_ptr;
+ fprintf (stderr, " reloc %2d @%08x off %4x : sym %-10s addend %x\n",
+ i, r, r->address, s->name, r->addend);
+ }
+ }
+#endif
+}
+
+static void
+write_contents (abfd, sec, xxx)
+ bfd *abfd;
+ asection *sec;
+ PTR xxx;
+{
+ segment_info_type *seginfo = seg_info (sec);
+ unsigned long offset = 0;
+ fragS *f;
+
+ /* Write out the frags. */
+ if (seginfo == NULL
+ || ! (bfd_get_section_flags (abfd, sec) & SEC_HAS_CONTENTS))
+ return;
+
+ for (f = seginfo->frchainP->frch_root;
+ f;
+ f = f->fr_next)
+ {
+ int x;
+ unsigned long fill_size;
+ char *fill_literal;
+ long count;
+
+ assert (f->fr_type == rs_fill);
+ if (f->fr_fix)
+ {
+ x = bfd_set_section_contents (stdoutput, sec,
+ f->fr_literal, (file_ptr) offset,
+ (bfd_size_type) f->fr_fix);
+ if (x == false)
+ {
+ bfd_perror (stdoutput->filename);
+ as_perror (_("FATAL: Can't write %s"), stdoutput->filename);
+ exit (EXIT_FAILURE);
+ }
+ offset += f->fr_fix;
+ }
+ fill_literal = f->fr_literal + f->fr_fix;
+ fill_size = f->fr_var;
+ count = f->fr_offset;
+ assert (count >= 0);
+ if (fill_size && count)
+ {
+ char buf[256];
+ if (fill_size > sizeof(buf))
+ {
+ /* Do it the old way. Can this ever happen? */
+ while (count--)
+ {
+ x = bfd_set_section_contents (stdoutput, sec,
+ fill_literal,
+ (file_ptr) offset,
+ (bfd_size_type) fill_size);
+ if (x == false)
+ {
+ bfd_perror (stdoutput->filename);
+ as_perror (_("FATAL: Can't write %s"), stdoutput->filename);
+ exit (EXIT_FAILURE);
+ }
+ offset += fill_size;
+ }
+ }
+ else
+ {
+ /* Build a buffer full of fill objects and output it as
+ often as necessary. This saves on the overhead of
+ potentially lots of bfd_set_section_contents calls. */
+ int n_per_buf, i;
+ if (fill_size == 1)
+ {
+ n_per_buf = sizeof (buf);
+ memset (buf, *fill_literal, n_per_buf);
+ }
+ else
+ {
+ char *bufp;
+ n_per_buf = sizeof(buf)/fill_size;
+ for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size)
+ memcpy(bufp, fill_literal, fill_size);
+ }
+ for (; count > 0; count -= n_per_buf)
+ {
+ n_per_buf = n_per_buf > count ? count : n_per_buf;
+ x = bfd_set_section_contents (stdoutput, sec,
+ buf, (file_ptr) offset,
+ (bfd_size_type) n_per_buf * fill_size);
+ if (x != true)
+ as_fatal (_("Cannot write to output file."));
+ offset += n_per_buf * fill_size;
+ }
+ }
+ }
+ }
+}
+#endif
+
+#if defined(BFD_ASSEMBLER) || (!defined (BFD) && !defined(OBJ_AOUT))
+static void
+merge_data_into_text ()
+{
+#if defined(BFD_ASSEMBLER) || defined(MANY_SEGMENTS)
+ seg_info (text_section)->frchainP->frch_last->fr_next =
+ seg_info (data_section)->frchainP->frch_root;
+ seg_info (text_section)->frchainP->frch_last =
+ seg_info (data_section)->frchainP->frch_last;
+ seg_info (data_section)->frchainP = 0;
+#else
+ fixS *tmp;
+
+ text_last_frag->fr_next = data_frag_root;
+ text_last_frag = data_last_frag;
+ data_last_frag = NULL;
+ data_frag_root = NULL;
+ if (text_fix_root)
+ {
+ for (tmp = text_fix_root; tmp->fx_next; tmp = tmp->fx_next);;
+ tmp->fx_next = data_fix_root;
+ text_fix_tail = data_fix_tail;
+ }
+ else
+ text_fix_root = data_fix_root;
+ data_fix_root = NULL;
+#endif
+}
+#endif /* BFD_ASSEMBLER || (! BFD && ! OBJ_AOUT) */
+
+#if !defined (BFD_ASSEMBLER) && !defined (BFD)
+static void
+relax_and_size_all_segments ()
+{
+ fragS *fragP;
+
+ relax_segment (text_frag_root, SEG_TEXT);
+ relax_segment (data_frag_root, SEG_DATA);
+ relax_segment (bss_frag_root, SEG_BSS);
+ /*
+ * Now the addresses of frags are correct within the segment.
+ */
+
+ know (text_last_frag->fr_type == rs_fill && text_last_frag->fr_offset == 0);
+ H_SET_TEXT_SIZE (&headers, text_last_frag->fr_address);
+ text_last_frag->fr_address = H_GET_TEXT_SIZE (&headers);
+
+ /*
+ * Join the 2 segments into 1 huge segment.
+ * To do this, re-compute every rn_address in the SEG_DATA frags.
+ * Then join the data frags after the text frags.
+ *
+ * Determine a_data [length of data segment].
+ */
+ if (data_frag_root)
+ {
+ register relax_addressT slide;
+
+ know ((text_last_frag->fr_type == rs_fill) && (text_last_frag->fr_offset == 0));
+
+ H_SET_DATA_SIZE (&headers, data_last_frag->fr_address);
+ data_last_frag->fr_address = H_GET_DATA_SIZE (&headers);
+ slide = H_GET_TEXT_SIZE (&headers); /* & in file of the data segment. */
+#ifdef OBJ_BOUT
+#define RoundUp(N,S) (((N)+(S)-1)&-(S))
+ /* For b.out: If the data section has a strict alignment
+ requirement, its load address in the .o file will be
+ rounded up from the size of the text section. These
+ two values are *not* the same! Similarly for the bss
+ section.... */
+ slide = RoundUp (slide, 1 << section_alignment[SEG_DATA]);
+#endif
+
+ for (fragP = data_frag_root; fragP; fragP = fragP->fr_next)
+ {
+ fragP->fr_address += slide;
+ } /* for each data frag */
+
+ know (text_last_frag != 0);
+ text_last_frag->fr_next = data_frag_root;
+ }
+ else
+ {
+ H_SET_DATA_SIZE (&headers, 0);
+ }
+
+#ifdef OBJ_BOUT
+ /* See above comments on b.out data section address. */
+ {
+ long bss_vma;
+ if (data_last_frag == 0)
+ bss_vma = H_GET_TEXT_SIZE (&headers);
+ else
+ bss_vma = data_last_frag->fr_address;
+ bss_vma = RoundUp (bss_vma, 1 << section_alignment[SEG_BSS]);
+ bss_address_frag.fr_address = bss_vma;
+ }
+#else /* ! OBJ_BOUT */
+ bss_address_frag.fr_address = (H_GET_TEXT_SIZE (&headers) +
+ H_GET_DATA_SIZE (&headers));
+
+#endif /* ! OBJ_BOUT */
+
+ /* Slide all the frags */
+ if (bss_frag_root)
+ {
+ relax_addressT slide = bss_address_frag.fr_address;
+
+ for (fragP = bss_frag_root; fragP; fragP = fragP->fr_next)
+ {
+ fragP->fr_address += slide;
+ } /* for each bss frag */
+ }
+
+ if (bss_last_frag)
+ H_SET_BSS_SIZE (&headers,
+ bss_last_frag->fr_address - bss_frag_root->fr_address);
+ else
+ H_SET_BSS_SIZE (&headers, 0);
+}
+#endif /* ! BFD_ASSEMBLER && ! BFD */
+
+#if defined (BFD_ASSEMBLER) || !defined (BFD)
+
+#ifdef BFD_ASSEMBLER
+static void
+set_symtab ()
+{
+ int nsyms;
+ asymbol **asympp;
+ symbolS *symp;
+ boolean result;
+ extern PTR bfd_alloc PARAMS ((bfd *, size_t));
+
+ /* Count symbols. We can't rely on a count made by the loop in
+ write_object_file, because *_frob_file may add a new symbol or
+ two. */
+ nsyms = 0;
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ nsyms++;
+
+ if (nsyms)
+ {
+ int i;
+
+ asympp = (asymbol **) bfd_alloc (stdoutput,
+ nsyms * sizeof (asymbol *));
+ symp = symbol_rootP;
+ for (i = 0; i < nsyms; i++, symp = symbol_next (symp))
+ {
+ asympp[i] = symbol_get_bfdsym (symp);
+ symbol_mark_written (symp);
+ }
+ }
+ else
+ asympp = 0;
+ result = bfd_set_symtab (stdoutput, asympp, nsyms);
+ assert (result == true);
+ symbol_table_frozen = 1;
+}
+#endif
+
+/* Finish the subsegments. After every sub-segment, we fake an
+ ".align ...". This conforms to BSD4.2 brane-damage. We then fake
+ ".fill 0" because that is the kind of frag that requires least
+ thought. ".align" frags like to have a following frag since that
+ makes calculating their intended length trivial. */
+
+#ifndef SUB_SEGMENT_ALIGN
+#ifdef BFD_ASSEMBLER
+#define SUB_SEGMENT_ALIGN(SEG) (0)
+#else
+#define SUB_SEGMENT_ALIGN(SEG) (2)
+#endif
+#endif
+
+void
+subsegs_finish ()
+{
+ struct frchain *frchainP;
+
+ for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next)
+ {
+ subseg_set (frchainP->frch_seg, frchainP->frch_subseg);
+
+ /* This now gets called even if we had errors. In that case,
+ any alignment is meaningless, and, moreover, will look weird
+ if we are generating a listing. */
+ frag_align (had_errors () ? 0 : SUB_SEGMENT_ALIGN (now_seg),
+ subseg_text_p (now_seg) ? NOP_OPCODE : 0,
+ 0);
+
+ /* frag_align will have left a new frag.
+ Use this last frag for an empty ".fill".
+
+ For this segment ...
+ Create a last frag. Do not leave a "being filled in frag". */
+
+ frag_wane (frag_now);
+ frag_now->fr_fix = 0;
+ know (frag_now->fr_next == NULL);
+ }
+}
+
+/* Write the object file. */
+
+void
+write_object_file ()
+{
+#if ! defined (BFD_ASSEMBLER) || ! defined (WORKING_DOT_WORD)
+ fragS *fragP; /* Track along all frags. */
+#endif
+
+ /* Do we really want to write it? */
+ {
+ int n_warns, n_errs;
+ n_warns = had_warnings ();
+ n_errs = had_errors ();
+ /* The -Z flag indicates that an object file should be generated,
+ regardless of warnings and errors. */
+ if (flag_always_generate_output)
+ {
+ if (n_warns || n_errs)
+ as_warn (_("%d error%s, %d warning%s, generating bad object file.\n"),
+ n_errs, n_errs == 1 ? "" : "s",
+ n_warns, n_warns == 1 ? "" : "s");
+ }
+ else
+ {
+ if (n_errs)
+ as_fatal (_("%d error%s, %d warning%s, no object file generated.\n"),
+ n_errs, n_errs == 1 ? "" : "s",
+ n_warns, n_warns == 1 ? "" : "s");
+ }
+ }
+
+#ifdef OBJ_VMS
+ /* Under VMS we try to be compatible with VAX-11 "C". Thus, we call
+ a routine to check for the definition of the procedure "_main",
+ and if so -- fix it up so that it can be program entry point. */
+ vms_check_for_main ();
+#endif /* OBJ_VMS */
+
+ /* From now on, we don't care about sub-segments. Build one frag chain
+ for each segment. Linked thru fr_next. */
+
+#ifdef BFD_ASSEMBLER
+ /* Remove the sections created by gas for its own purposes. */
+ {
+ asection **seclist, *sec;
+ int i;
+
+ seclist = &stdoutput->sections;
+ while (seclist && *seclist)
+ {
+ sec = *seclist;
+ while (sec == reg_section || sec == expr_section)
+ {
+ sec = sec->next;
+ *seclist = sec;
+ stdoutput->section_count--;
+ if (!sec)
+ break;
+ }
+ if (*seclist)
+ seclist = &(*seclist)->next;
+ }
+ i = 0;
+ bfd_map_over_sections (stdoutput, renumber_sections, &i);
+ }
+
+ bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0);
+#else
+ remove_subsegs (frchain_root, SEG_TEXT, &text_frag_root, &text_last_frag);
+ remove_subsegs (data0_frchainP, SEG_DATA, &data_frag_root, &data_last_frag);
+ remove_subsegs (bss0_frchainP, SEG_BSS, &bss_frag_root, &bss_last_frag);
+#endif
+
+ /* We have two segments. If user gave -R flag, then we must put the
+ data frags into the text segment. Do this before relaxing so
+ we know to take advantage of -R and make shorter addresses. */
+#if !defined (OBJ_AOUT) || defined (BFD_ASSEMBLER)
+ if (flag_readonly_data_in_text)
+ {
+ merge_data_into_text ();
+ }
+#endif
+
+#ifdef BFD_ASSEMBLER
+ bfd_map_over_sections (stdoutput, relax_and_size_seg, (char *) 0);
+#else
+ relax_and_size_all_segments ();
+#endif /* BFD_ASSEMBLER */
+
+#ifndef BFD_ASSEMBLER
+ /*
+ *
+ * Crawl the symbol chain.
+ *
+ * For each symbol whose value depends on a frag, take the address of
+ * that frag and subsume it into the value of the symbol.
+ * After this, there is just one way to lookup a symbol value.
+ * Values are left in their final state for object file emission.
+ * We adjust the values of 'L' local symbols, even if we do
+ * not intend to emit them to the object file, because their values
+ * are needed for fix-ups.
+ *
+ * Unless we saw a -L flag, remove all symbols that begin with 'L'
+ * from the symbol chain. (They are still pointed to by the fixes.)
+ *
+ * Count the remaining symbols.
+ * Assign a symbol number to each symbol.
+ * Count the number of string-table chars we will emit.
+ * Put this info into the headers as appropriate.
+ *
+ */
+ know (zero_address_frag.fr_address == 0);
+ string_byte_count = sizeof (string_byte_count);
+
+ obj_crawl_symbol_chain (&headers);
+
+ if (string_byte_count == sizeof (string_byte_count))
+ string_byte_count = 0;
+
+ H_SET_STRING_SIZE (&headers, string_byte_count);
+
+ /*
+ * Addresses of frags now reflect addresses we use in the object file.
+ * Symbol values are correct.
+ * Scan the frags, converting any ".org"s and ".align"s to ".fill"s.
+ * Also converting any machine-dependent frags using md_convert_frag();
+ */
+ subseg_change (SEG_TEXT, 0);
+
+ for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
+ {
+ /* At this point we have linked all the frags into a single
+ chain. However, cvt_frag_to_fill may call md_convert_frag
+ which may call fix_new. We need to ensure that fix_new adds
+ the fixup to the right section. */
+ if (fragP == data_frag_root)
+ subseg_change (SEG_DATA, 0);
+
+ cvt_frag_to_fill (&headers, SEG_TEXT, fragP);
+
+ /* Some assert macros don't work with # directives mixed in. */
+#ifndef NDEBUG
+ if (!(fragP->fr_next == NULL
+#ifdef OBJ_BOUT
+ || fragP->fr_next == data_frag_root
+#endif
+ || ((fragP->fr_next->fr_address - fragP->fr_address)
+ == (fragP->fr_fix + fragP->fr_offset * fragP->fr_var))))
+ abort ();
+#endif
+ }
+#endif /* ! BFD_ASSEMBLER */
+
+#ifndef WORKING_DOT_WORD
+ {
+ struct broken_word *lie;
+ struct broken_word **prevP;
+
+ prevP = &broken_words;
+ for (lie = broken_words; lie; lie = lie->next_broken_word)
+ if (!lie->added)
+ {
+ expressionS exp;
+
+ subseg_change (lie->seg, lie->subseg);
+ exp.X_op = O_subtract;
+ exp.X_add_symbol = lie->add;
+ exp.X_op_symbol = lie->sub;
+ exp.X_add_number = lie->addnum;
+#ifdef BFD_ASSEMBLER
+#ifdef TC_CONS_FIX_NEW
+ TC_CONS_FIX_NEW (lie->frag,
+ lie->word_goes_here - lie->frag->fr_literal,
+ 2, &exp);
+#else
+ fix_new_exp (lie->frag,
+ lie->word_goes_here - lie->frag->fr_literal,
+ 2, &exp, 0, BFD_RELOC_16);
+#endif
+#else
+#if defined(TC_SPARC) || defined(TC_A29K) || defined(NEED_FX_R_TYPE)
+ fix_new_exp (lie->frag,
+ lie->word_goes_here - lie->frag->fr_literal,
+ 2, &exp, 0, NO_RELOC);
+#else
+#ifdef TC_NS32K
+ fix_new_ns32k_exp (lie->frag,
+ lie->word_goes_here - lie->frag->fr_literal,
+ 2, &exp, 0, 0, 2, 0, 0);
+#else
+ fix_new_exp (lie->frag,
+ lie->word_goes_here - lie->frag->fr_literal,
+ 2, &exp, 0, 0);
+#endif /* TC_NS32K */
+#endif /* TC_SPARC|TC_A29K|NEED_FX_R_TYPE */
+#endif /* BFD_ASSEMBLER */
+ *prevP = lie->next_broken_word;
+ }
+ else
+ prevP = &(lie->next_broken_word);
+
+ for (lie = broken_words; lie;)
+ {
+ struct broken_word *untruth;
+ char *table_ptr;
+ addressT table_addr;
+ addressT from_addr, to_addr;
+ int n, m;
+
+ subseg_change (lie->seg, lie->subseg);
+ fragP = lie->dispfrag;
+
+ /* Find out how many broken_words go here. */
+ n = 0;
+ for (untruth = lie; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word)
+ if (untruth->added == 1)
+ n++;
+
+ table_ptr = lie->dispfrag->fr_opcode;
+ table_addr = lie->dispfrag->fr_address + (table_ptr - lie->dispfrag->fr_literal);
+ /* Create the jump around the long jumps. This is a short
+ jump from table_ptr+0 to table_ptr+n*long_jump_size. */
+ from_addr = table_addr;
+ to_addr = table_addr + md_short_jump_size + n * md_long_jump_size;
+ md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add);
+ table_ptr += md_short_jump_size;
+ table_addr += md_short_jump_size;
+
+ for (m = 0; lie && lie->dispfrag == fragP; m++, lie = lie->next_broken_word)
+ {
+ if (lie->added == 2)
+ continue;
+ /* Patch the jump table */
+ /* This is the offset from ??? to table_ptr+0 */
+ to_addr = table_addr - S_GET_VALUE (lie->sub);
+#ifdef BFD_ASSEMBLER
+ to_addr -= symbol_get_frag (lie->sub)->fr_address;
+#endif
+ md_number_to_chars (lie->word_goes_here, to_addr, 2);
+ for (untruth = lie->next_broken_word; untruth && untruth->dispfrag == fragP; untruth = untruth->next_broken_word)
+ {
+ if (untruth->use_jump == lie)
+ md_number_to_chars (untruth->word_goes_here, to_addr, 2);
+ }
+
+ /* Install the long jump */
+ /* this is a long jump from table_ptr+0 to the final target */
+ from_addr = table_addr;
+ to_addr = S_GET_VALUE (lie->add) + lie->addnum;
+#ifdef BFD_ASSEMBLER
+ to_addr += symbol_get_frag (lie->add)->fr_address;
+#endif
+ md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag, lie->add);
+ table_ptr += md_long_jump_size;
+ table_addr += md_long_jump_size;
+ }
+ }
+ }
+#endif /* not WORKING_DOT_WORD */
+
+#ifndef BFD_ASSEMBLER
+#ifndef OBJ_VMS
+ { /* not vms */
+ char *the_object_file;
+ long object_file_size;
+ /*
+ * Scan every FixS performing fixups. We had to wait until now to do
+ * this because md_convert_frag() may have made some fixSs.
+ */
+ int trsize, drsize;
+
+ subseg_change (SEG_TEXT, 0);
+ trsize = md_reloc_size * fixup_segment (text_fix_root, SEG_TEXT);
+ subseg_change (SEG_DATA, 0);
+ drsize = md_reloc_size * fixup_segment (data_fix_root, SEG_DATA);
+ H_SET_RELOCATION_SIZE (&headers, trsize, drsize);
+
+ /* FIXME move this stuff into the pre-write-hook */
+ H_SET_MAGIC_NUMBER (&headers, magic_number_for_object_file);
+ H_SET_ENTRY_POINT (&headers, 0);
+
+ obj_pre_write_hook (&headers); /* extra coff stuff */
+
+ object_file_size = H_GET_FILE_SIZE (&headers);
+ next_object_file_charP = the_object_file = xmalloc (object_file_size);
+
+ output_file_create (out_file_name);
+
+ obj_header_append (&next_object_file_charP, &headers);
+
+ know ((next_object_file_charP - the_object_file) == H_GET_HEADER_SIZE (&headers));
+
+ /*
+ * Emit code.
+ */
+ for (fragP = text_frag_root; fragP; fragP = fragP->fr_next)
+ {
+ register long count;
+ register char *fill_literal;
+ register long fill_size;
+
+ PROGRESS (1);
+ know (fragP->fr_type == rs_fill);
+ append (&next_object_file_charP, fragP->fr_literal, (unsigned long) fragP->fr_fix);
+ fill_literal = fragP->fr_literal + fragP->fr_fix;
+ fill_size = fragP->fr_var;
+ know (fragP->fr_offset >= 0);
+
+ for (count = fragP->fr_offset; count; count--)
+ {
+ append (&next_object_file_charP, fill_literal, (unsigned long) fill_size);
+ } /* for each */
+
+ } /* for each code frag. */
+
+ know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers)));
+
+ /*
+ * Emit relocations.
+ */
+ obj_emit_relocations (&next_object_file_charP, text_fix_root, (relax_addressT) 0);
+ know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers)));
+#ifdef TC_I960
+ /* Make addresses in data relocation directives relative to beginning of
+ * first data fragment, not end of last text fragment: alignment of the
+ * start of the data segment may place a gap between the segments.
+ */
+ obj_emit_relocations (&next_object_file_charP, data_fix_root, data0_frchainP->frch_root->fr_address);
+#else /* TC_I960 */
+ obj_emit_relocations (&next_object_file_charP, data_fix_root, text_last_frag->fr_address);
+#endif /* TC_I960 */
+
+ know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers)));
+
+ /*
+ * Emit line number entries.
+ */
+ OBJ_EMIT_LINENO (&next_object_file_charP, lineno_rootP, the_object_file);
+ know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers) + H_GET_LINENO_SIZE (&headers)));
+
+ /*
+ * Emit symbols.
+ */
+ obj_emit_symbols (&next_object_file_charP, symbol_rootP);
+ know ((next_object_file_charP - the_object_file) == (H_GET_HEADER_SIZE (&headers) + H_GET_TEXT_SIZE (&headers) + H_GET_DATA_SIZE (&headers) + H_GET_TEXT_RELOCATION_SIZE (&headers) + H_GET_DATA_RELOCATION_SIZE (&headers) + H_GET_LINENO_SIZE (&headers) + H_GET_SYMBOL_TABLE_SIZE (&headers)));
+
+ /*
+ * Emit strings.
+ */
+
+ if (string_byte_count > 0)
+ {
+ obj_emit_strings (&next_object_file_charP);
+ } /* only if we have a string table */
+
+#ifdef BFD_HEADERS
+ bfd_seek (stdoutput, 0, 0);
+ bfd_write (the_object_file, 1, object_file_size, stdoutput);
+#else
+
+ /* Write the data to the file */
+ output_file_append (the_object_file, object_file_size, out_file_name);
+ free (the_object_file);
+#endif
+ } /* non vms output */
+#else /* OBJ_VMS */
+ /*
+ * Now do the VMS-dependent part of writing the object file
+ */
+ vms_write_object_file (H_GET_TEXT_SIZE (&headers),
+ H_GET_DATA_SIZE (&headers),
+ H_GET_BSS_SIZE (&headers),
+ text_frag_root, data_frag_root);
+#endif /* OBJ_VMS */
+#else /* BFD_ASSEMBLER */
+
+ /* Resolve symbol values. This needs to be done before processing
+ the relocations. */
+ if (symbol_rootP)
+ {
+ symbolS *symp;
+
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ resolve_symbol_value (symp, 1);
+ }
+ resolve_local_symbol_values ();
+
+ PROGRESS (1);
+
+#ifdef tc_frob_file_before_adjust
+ tc_frob_file_before_adjust ();
+#endif
+#ifdef obj_frob_file_before_adjust
+ obj_frob_file_before_adjust ();
+#endif
+
+ bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *)0);
+
+ /* Set up symbol table, and write it out. */
+ if (symbol_rootP)
+ {
+ symbolS *symp;
+
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ {
+ int punt = 0;
+ const char *name;
+
+ if (symbol_mri_common_p (symp))
+ {
+ if (S_IS_EXTERNAL (symp))
+ as_bad (_("%s: global symbols not supported in common sections"),
+ S_GET_NAME (symp));
+ symbol_remove (symp, &symbol_rootP, &symbol_lastP);
+ continue;
+ }
+
+ name = S_GET_NAME (symp);
+ if (name)
+ {
+ const char *name2 = decode_local_label_name ((char *)S_GET_NAME (symp));
+ /* They only differ if `name' is a fb or dollar local
+ label name. */
+ if (name2 != name && ! S_IS_DEFINED (symp))
+ as_bad (_("local label %s is not defined"), name2);
+ }
+
+ /* Do it again, because adjust_reloc_syms might introduce
+ more symbols. They'll probably only be section symbols,
+ but they'll still need to have the values computed. */
+ resolve_symbol_value (symp, 1);
+
+ /* Skip symbols which were equated to undefined or common
+ symbols. */
+ if (symbol_equated_p (symp)
+ && (! S_IS_DEFINED (symp) || S_IS_COMMON (symp)))
+ {
+ symbol_remove (symp, &symbol_rootP, &symbol_lastP);
+ continue;
+ }
+
+ /* So far, common symbols have been treated like undefined symbols.
+ Put them in the common section now. */
+ if (S_IS_DEFINED (symp) == 0
+ && S_GET_VALUE (symp) != 0)
+ S_SET_SEGMENT (symp, bfd_com_section_ptr);
+#if 0
+ printf ("symbol `%s'\n\t@%x: value=%d flags=%x seg=%s\n",
+ S_GET_NAME (symp), symp,
+ S_GET_VALUE (symp),
+ symbol_get_bfdsym (symp)->flags,
+ segment_name (S_GET_SEGMENT (symp)));
+#endif
+
+#ifdef obj_frob_symbol
+ obj_frob_symbol (symp, punt);
+#endif
+#ifdef tc_frob_symbol
+ if (! punt || symbol_used_in_reloc_p (symp))
+ tc_frob_symbol (symp, punt);
+#endif
+
+ /* If we don't want to keep this symbol, splice it out of
+ the chain now. If EMIT_SECTION_SYMBOLS is 0, we never
+ want section symbols. Otherwise, we skip local symbols
+ and symbols that the frob_symbol macros told us to punt,
+ but we keep such symbols if they are used in relocs. */
+ if ((! EMIT_SECTION_SYMBOLS
+ && symbol_section_p (symp))
+ /* Note that S_IS_EXTERN and S_IS_LOCAL are not always
+ opposites. Sometimes the former checks flags and the
+ latter examines the name... */
+ || (!S_IS_EXTERN (symp)
+ && (S_IS_LOCAL (symp) || punt)
+ && ! symbol_used_in_reloc_p (symp)))
+ {
+ symbol_remove (symp, &symbol_rootP, &symbol_lastP);
+ /* After symbol_remove, symbol_next(symp) still returns
+ the one that came after it in the chain. So we don't
+ need to do any extra cleanup work here. */
+
+ continue;
+ }
+
+ /* Make sure we really got a value for the symbol. */
+ if (! symbol_resolved_p (symp))
+ {
+ as_bad (_("can't resolve value for symbol \"%s\""),
+ S_GET_NAME (symp));
+ symbol_mark_resolved (symp);
+ }
+
+ /* Set the value into the BFD symbol. Up til now the value
+ has only been kept in the gas symbolS struct. */
+ symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);
+ }
+ }
+
+ PROGRESS (1);
+
+ /* Now do any format-specific adjustments to the symbol table, such
+ as adding file symbols. */
+#ifdef tc_adjust_symtab
+ tc_adjust_symtab ();
+#endif
+#ifdef obj_adjust_symtab
+ obj_adjust_symtab ();
+#endif
+
+ /* Now that all the sizes are known, and contents correct, we can
+ start writing to the file. */
+ set_symtab ();
+
+ /* If *_frob_file changes the symbol value at this point, it is
+ responsible for moving the changed value into symp->bsym->value
+ as well. Hopefully all symbol value changing can be done in
+ *_frob_symbol. */
+#ifdef tc_frob_file
+ tc_frob_file ();
+#endif
+#ifdef obj_frob_file
+ obj_frob_file ();
+#endif
+
+ bfd_map_over_sections (stdoutput, write_relocs, (char *) 0);
+
+#ifdef tc_frob_file_after_relocs
+ tc_frob_file_after_relocs ();
+#endif
+#ifdef obj_frob_file_after_relocs
+ obj_frob_file_after_relocs ();
+#endif
+
+ bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
+#endif /* BFD_ASSEMBLER */
+}
+#endif /* ! BFD */
+
+/*
+ * relax_segment()
+ *
+ * Now we have a segment, not a crowd of sub-segments, we can make fr_address
+ * values.
+ *
+ * Relax the frags.
+ *
+ * After this, all frags in this segment have addresses that are correct
+ * within the segment. Since segments live in different file addresses,
+ * these frag addresses may not be the same as final object-file addresses.
+ */
+
+#ifdef TC_GENERIC_RELAX_TABLE
+
+static int is_dnrange PARAMS ((fragS *, fragS *));
+
+/* Subroutines of relax_segment. */
+static int
+is_dnrange (f1, f2)
+ fragS *f1;
+ fragS *f2;
+{
+ for (; f1; f1 = f1->fr_next)
+ if (f1->fr_next == f2)
+ return 1;
+ return 0;
+}
+
+/* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE. */
+
+long
+relax_frag (fragP, stretch)
+ fragS *fragP;
+ long stretch;
+{
+ const relax_typeS *this_type;
+ const relax_typeS *start_type;
+ relax_substateT next_state;
+ relax_substateT this_state;
+ long aim, target, growth;
+ symbolS *symbolP = fragP->fr_symbol;
+ long offset = fragP->fr_offset;
+ /* Recompute was_address by undoing "+= stretch" done by relax_segment. */
+ unsigned long was_address = fragP->fr_address - stretch;
+ unsigned long address = fragP->fr_address;
+ const relax_typeS *table = TC_GENERIC_RELAX_TABLE;
+
+ this_state = fragP->fr_subtype;
+ start_type = this_type = table + this_state;
+ target = offset;
+
+ if (symbolP)
+ {
+#ifndef DIFF_EXPR_OK
+#if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
+ know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
+ || (S_GET_SEGMENT (symbolP) == SEG_DATA)
+ || (S_GET_SEGMENT (symbolP) == SEG_BSS)
+ || (S_GET_SEGMENT (symbolP) == SEG_TEXT));
+#endif
+ know (symbolP->sy_frag);
+#endif
+ know (!(S_GET_SEGMENT (symbolP) == absolute_section)
+ || symbolP->sy_frag == &zero_address_frag);
+ target += S_GET_VALUE (symbolP) + symbol_get_frag (symbolP)->fr_address;
+
+ /* If frag has yet to be reached on this pass,
+ assume it will move by STRETCH just as we did.
+ If this is not so, it will be because some frag
+ between grows, and that will force another pass.
+
+ Beware zero-length frags.
+
+ There should be a faster way to do this. */
+
+ if (symbol_get_frag (symbolP)->fr_address >= was_address
+ && is_dnrange (fragP, symbol_get_frag (symbolP)))
+ {
+ target += stretch;
+ }
+ }
+
+ aim = target - address - fragP->fr_fix;
+#ifdef TC_PCREL_ADJUST
+ /* Currently only the ns32k family needs this */
+ aim += TC_PCREL_ADJUST(fragP);
+/*#else*/
+ /* This machine doesn't want to use pcrel_adjust.
+ In that case, pcrel_adjust should be zero. */
+/* assert (fragP->fr_targ.ns32k.pcrel_adjust == 0);*/
+#endif
+#ifdef md_prepare_relax_scan /* formerly called M68K_AIM_KLUDGE */
+ md_prepare_relax_scan (fragP, address, aim, this_state, this_type);
+#endif
+
+ if (aim < 0)
+ {
+ /* Look backwards. */
+ for (next_state = this_type->rlx_more; next_state;)
+ if (aim >= this_type->rlx_backward)
+ next_state = 0;
+ else
+ {
+ /* Grow to next state. */
+ this_state = next_state;
+ this_type = table + this_state;
+ next_state = this_type->rlx_more;
+ }
+ }
+ else
+ {
+ /* Look forwards. */
+ for (next_state = this_type->rlx_more; next_state;)
+ if (aim <= this_type->rlx_forward)
+ next_state = 0;
+ else
+ {
+ /* Grow to next state. */
+ this_state = next_state;
+ this_type = table + this_state;
+ next_state = this_type->rlx_more;
+ }
+ }
+
+ growth = this_type->rlx_length - start_type->rlx_length;
+ if (growth != 0)
+ fragP->fr_subtype = this_state;
+ return growth;
+}
+
+#endif /* defined (TC_GENERIC_RELAX_TABLE) */
+
+/* Relax_align. Advance location counter to next address that has 'alignment'
+ lowest order bits all 0s, return size of adjustment made. */
+static relax_addressT
+relax_align (address, alignment)
+ register relax_addressT address; /* Address now. */
+ register int alignment; /* Alignment (binary). */
+{
+ relax_addressT mask;
+ relax_addressT new_address;
+
+ mask = ~((~0) << alignment);
+ new_address = (address + mask) & (~mask);
+#ifdef LINKER_RELAXING_SHRINKS_ONLY
+ if (linkrelax)
+ /* We must provide lots of padding, so the linker can discard it
+ when needed. The linker will not add extra space, ever. */
+ new_address += (1 << alignment);
+#endif
+ return (new_address - address);
+}
+
+void
+relax_segment (segment_frag_root, segment)
+ struct frag *segment_frag_root;
+ segT segment;
+{
+ register struct frag *fragP;
+ register relax_addressT address;
+#if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
+ know (segment == SEG_DATA || segment == SEG_TEXT || segment == SEG_BSS);
+#endif
+ /* In case md_estimate_size_before_relax() wants to make fixSs. */
+ subseg_change (segment, 0);
+
+ /* For each frag in segment: count and store (a 1st guess of)
+ fr_address. */
+ address = 0;
+ for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
+ {
+ fragP->fr_address = address;
+ address += fragP->fr_fix;
+
+ switch (fragP->fr_type)
+ {
+ case rs_fill:
+ address += fragP->fr_offset * fragP->fr_var;
+ break;
+
+ case rs_align:
+ case rs_align_code:
+ {
+ addressT offset = relax_align (address, (int) fragP->fr_offset);
+
+ if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype)
+ offset = 0;
+
+ if (offset % fragP->fr_var != 0)
+ {
+ as_bad (_("alignment padding (%lu bytes) not a multiple of %ld"),
+ (unsigned long) offset, (long) fragP->fr_var);
+ offset -= (offset % fragP->fr_var);
+ }
+
+ address += offset;
+ }
+ break;
+
+ case rs_org:
+ case rs_space:
+ /* Assume .org is nugatory. It will grow with 1st relax. */
+ break;
+
+ case rs_machine_dependent:
+ address += md_estimate_size_before_relax (fragP, segment);
+ break;
+
+#ifndef WORKING_DOT_WORD
+ /* Broken words don't concern us yet */
+ case rs_broken_word:
+ break;
+#endif
+
+ case rs_leb128:
+ /* Initial guess is always 1; doing otherwise can result in
+ stable solutions that are larger than the minimum. */
+ address += fragP->fr_offset = 1;
+ break;
+
+ case rs_cfa:
+ address += eh_frame_estimate_size_before_relax (fragP);
+ break;
+
+ default:
+ BAD_CASE (fragP->fr_type);
+ break;
+ } /* switch(fr_type) */
+ } /* for each frag in the segment */
+
+ /* Do relax(). */
+ {
+ long stretch; /* May be any size, 0 or negative. */
+ /* Cumulative number of addresses we have */
+ /* relaxed this pass. */
+ /* We may have relaxed more than one address. */
+ long stretched; /* Have we stretched on this pass? */
+ /* This is 'cuz stretch may be zero, when, in fact some piece of code
+ grew, and another shrank. If a branch instruction doesn't fit anymore,
+ we could be scrod. */
+
+ do
+ {
+ stretch = stretched = 0;
+ for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
+ {
+ long growth = 0;
+ addressT was_address;
+ offsetT offset;
+ symbolS *symbolP;
+
+ was_address = fragP->fr_address;
+ address = fragP->fr_address += stretch;
+ symbolP = fragP->fr_symbol;
+ offset = fragP->fr_offset;
+
+ switch (fragP->fr_type)
+ {
+ case rs_fill: /* .fill never relaxes. */
+ growth = 0;
+ break;
+
+#ifndef WORKING_DOT_WORD
+ /* JF: This is RMS's idea. I do *NOT* want to be blamed
+ for it I do not want to write it. I do not want to have
+ anything to do with it. This is not the proper way to
+ implement this misfeature. */
+ case rs_broken_word:
+ {
+ struct broken_word *lie;
+ struct broken_word *untruth;
+
+ /* Yes this is ugly (storing the broken_word pointer
+ in the symbol slot). Still, this whole chunk of
+ code is ugly, and I don't feel like doing anything
+ about it. Think of it as stubbornness in action. */
+ growth = 0;
+ for (lie = (struct broken_word *) (fragP->fr_symbol);
+ lie && lie->dispfrag == fragP;
+ lie = lie->next_broken_word)
+ {
+
+ if (lie->added)
+ continue;
+
+ offset = (symbol_get_frag (lie->add)->fr_address
+ + S_GET_VALUE (lie->add)
+ + lie->addnum
+ - (symbol_get_frag (lie->sub)->fr_address
+ + S_GET_VALUE (lie->sub)));
+ if (offset <= -32768 || offset >= 32767)
+ {
+ if (flag_warn_displacement)
+ {
+ char buf[50];
+ sprint_value (buf, (addressT) lie->addnum);
+ as_warn (_(".word %s-%s+%s didn't fit"),
+ S_GET_NAME (lie->add),
+ S_GET_NAME (lie->sub),
+ buf);
+ }
+ lie->added = 1;
+ if (fragP->fr_subtype == 0)
+ {
+ fragP->fr_subtype++;
+ growth += md_short_jump_size;
+ }
+ for (untruth = lie->next_broken_word;
+ untruth && untruth->dispfrag == lie->dispfrag;
+ untruth = untruth->next_broken_word)
+ if ((symbol_get_frag (untruth->add)
+ == symbol_get_frag (lie->add))
+ && (S_GET_VALUE (untruth->add)
+ == S_GET_VALUE (lie->add)))
+ {
+ untruth->added = 2;
+ untruth->use_jump = lie;
+ }
+ growth += md_long_jump_size;
+ }
+ }
+
+ break;
+ } /* case rs_broken_word */
+#endif
+ case rs_align:
+ case rs_align_code:
+ {
+ addressT oldoff, newoff;
+
+ oldoff = relax_align (was_address + fragP->fr_fix,
+ (int) offset);
+ newoff = relax_align (address + fragP->fr_fix,
+ (int) offset);
+
+ if (fragP->fr_subtype != 0)
+ {
+ if (oldoff > fragP->fr_subtype)
+ oldoff = 0;
+ if (newoff > fragP->fr_subtype)
+ newoff = 0;
+ }
+
+ growth = newoff - oldoff;
+ }
+ break;
+
+ case rs_org:
+ {
+ long target = offset;
+ long after;
+
+ if (symbolP)
+ {
+#if !defined (MANY_SEGMENTS) && !defined (BFD_ASSEMBLER)
+ know ((S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
+ || (S_GET_SEGMENT (symbolP) == SEG_DATA)
+ || (S_GET_SEGMENT (symbolP) == SEG_TEXT)
+ || S_GET_SEGMENT (symbolP) == SEG_BSS);
+ know (symbolP->sy_frag);
+ know (!(S_GET_SEGMENT (symbolP) == SEG_ABSOLUTE)
+ || (symbolP->sy_frag == &zero_address_frag));
+#endif
+ target += (S_GET_VALUE (symbolP)
+ + symbol_get_frag (symbolP)->fr_address);
+ } /* if we have a symbol */
+
+ know (fragP->fr_next);
+ after = fragP->fr_next->fr_address;
+ growth = target - after;
+ if (growth < 0)
+ {
+ /* Growth may be negative, but variable part of frag
+ cannot have fewer than 0 chars. That is, we can't
+ .org backwards. */
+ as_bad (_("attempt to .org backwards ignored"));
+ growth = 0;
+ }
+
+ growth -= stretch; /* This is an absolute growth factor */
+ break;
+ }
+
+ case rs_space:
+ if (symbolP)
+ {
+ growth = S_GET_VALUE (symbolP);
+ if (symbol_get_frag (symbolP) != &zero_address_frag
+ || S_IS_COMMON (symbolP)
+ || ! S_IS_DEFINED (symbolP))
+ as_bad_where (fragP->fr_file, fragP->fr_line,
+ _(".space specifies non-absolute value"));
+ fragP->fr_symbol = 0;
+ if (growth < 0)
+ {
+ as_warn (_(".space or .fill with negative value, ignored"));
+ growth = 0;
+ }
+ }
+ else
+ growth = 0;
+ break;
+
+ case rs_machine_dependent:
+#ifdef md_relax_frag
+ growth = md_relax_frag (fragP, stretch);
+#else
+#ifdef TC_GENERIC_RELAX_TABLE
+ /* The default way to relax a frag is to look through
+ TC_GENERIC_RELAX_TABLE. */
+ growth = relax_frag (fragP, stretch);
+#endif /* TC_GENERIC_RELAX_TABLE */
+#endif
+ break;
+
+ case rs_leb128:
+ {
+ valueT value;
+ int size;
+
+ value = resolve_symbol_value (fragP->fr_symbol, 0);
+ size = sizeof_leb128 (value, fragP->fr_subtype);
+ growth = size - fragP->fr_offset;
+ fragP->fr_offset = size;
+ }
+ break;
+
+ case rs_cfa:
+ growth = eh_frame_relax_frag (fragP);
+ break;
+
+ default:
+ BAD_CASE (fragP->fr_type);
+ break;
+ }
+ if (growth)
+ {
+ stretch += growth;
+ stretched++;
+ }
+ } /* For each frag in the segment. */
+ }
+ while (stretched); /* Until nothing further to relax. */
+ } /* do_relax */
+
+ /*
+ * We now have valid fr_address'es for each frag.
+ */
+
+ /*
+ * All fr_address's are correct, relative to their own segment.
+ * We have made all the fixS we will ever make.
+ */
+} /* relax_segment() */
+
+#if defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS))
+
+#ifndef TC_RELOC_RTSYM_LOC_FIXUP
+#define TC_RELOC_RTSYM_LOC_FIXUP(X) (1)
+#endif
+
+/* fixup_segment()
+
+ Go through all the fixS's in a segment and see which ones can be
+ handled now. (These consist of fixS where we have since discovered
+ the value of a symbol, or the address of the frag involved.)
+ For each one, call md_apply_fix to put the fix into the frag data.
+
+ Result is a count of how many relocation structs will be needed to
+ handle the remaining fixS's that we couldn't completely handle here.
+ These will be output later by emit_relocations(). */
+
+static long
+fixup_segment (fixP, this_segment_type)
+ register fixS *fixP;
+ segT this_segment_type; /* N_TYPE bits for segment. */
+{
+ long seg_reloc_count = 0;
+ symbolS *add_symbolP;
+ symbolS *sub_symbolP;
+ valueT add_number;
+ int size;
+ char *place;
+ long where;
+ int pcrel, plt;
+ fragS *fragP;
+ segT add_symbol_segment = absolute_section;
+
+ /* If the linker is doing the relaxing, we must not do any fixups.
+
+ Well, strictly speaking that's not true -- we could do any that are
+ PC-relative and don't cross regions that could change size. And for the
+ i960 (the only machine for which we've got a relaxing linker right now),
+ we might be able to turn callx/callj into bal anyways in cases where we
+ know the maximum displacement. */
+ if (linkrelax)
+ {
+ for (; fixP; fixP = fixP->fx_next)
+ seg_reloc_count++;
+ TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
+ return seg_reloc_count;
+ }
+
+ for (; fixP; fixP = fixP->fx_next)
+ {
+
+#ifdef DEBUG5
+ fprintf (stderr, "\nprocessing fixup:\n");
+ print_fixup (fixP);
+#endif
+
+
+ fragP = fixP->fx_frag;
+ know (fragP);
+ where = fixP->fx_where;
+ place = fragP->fr_literal + where;
+ size = fixP->fx_size;
+ add_symbolP = fixP->fx_addsy;
+#ifdef TC_VALIDATE_FIX
+ TC_VALIDATE_FIX (fixP, this_segment_type, skip);
+#endif
+ sub_symbolP = fixP->fx_subsy;
+ add_number = fixP->fx_offset;
+ pcrel = fixP->fx_pcrel;
+ plt = fixP->fx_plt;
+
+ if (add_symbolP != NULL
+ && symbol_mri_common_p (add_symbolP))
+ {
+ know (add_symbolP->sy_value.X_op == O_symbol);
+ add_number += S_GET_VALUE (add_symbolP);
+ fixP->fx_offset = add_number;
+ add_symbolP = fixP->fx_addsy =
+ symbol_get_value_expression (add_symbolP)->X_add_symbol;
+ }
+
+ if (add_symbolP)
+ add_symbol_segment = S_GET_SEGMENT (add_symbolP);
+
+ if (sub_symbolP)
+ {
+ resolve_symbol_value (sub_symbolP, 1);
+ if (add_symbolP == NULL || add_symbol_segment == absolute_section)
+ {
+ if (add_symbolP != NULL)
+ {
+ add_number += S_GET_VALUE (add_symbolP);
+ add_symbolP = NULL;
+ fixP->fx_addsy = NULL;
+ }
+
+ /* It's just -sym */
+ if (S_GET_SEGMENT (sub_symbolP) == absolute_section)
+ {
+ add_number -= S_GET_VALUE (sub_symbolP);
+ fixP->fx_subsy = NULL;
+ }
+ else if (pcrel
+ && S_GET_SEGMENT (sub_symbolP) == this_segment_type)
+ {
+ /* Should try converting to a constant. */
+ goto bad_sub_reloc;
+ }
+ else
+ bad_sub_reloc:
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("Negative of non-absolute symbol %s"),
+ S_GET_NAME (sub_symbolP));
+ }
+ else if (S_GET_SEGMENT (sub_symbolP) == add_symbol_segment
+ && SEG_NORMAL (add_symbol_segment))
+ {
+ /* Difference of 2 symbols from same segment.
+ Can't make difference of 2 undefineds: 'value' means
+ something different for N_UNDF. */
+#ifdef TC_I960
+ /* Makes no sense to use the difference of 2 arbitrary symbols
+ as the target of a call instruction. */
+ if (fixP->fx_tcbit)
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("callj to difference of 2 symbols"));
+#endif /* TC_I960 */
+ add_number += S_GET_VALUE (add_symbolP) -
+ S_GET_VALUE (sub_symbolP);
+
+ add_symbolP = NULL;
+ pcrel = 0; /* No further pcrel processing. */
+
+ /* Let the target machine make the final determination
+ as to whether or not a relocation will be needed to
+ handle this fixup. */
+ if (!TC_FORCE_RELOCATION_SECTION (fixP, this_segment_type))
+ {
+ fixP->fx_pcrel = 0;
+ fixP->fx_addsy = NULL;
+ fixP->fx_subsy = NULL;
+ }
+ }
+ else
+ {
+ /* Different segments in subtraction. */
+ know (!(S_IS_EXTERNAL (sub_symbolP)
+ && (S_GET_SEGMENT (sub_symbolP) == absolute_section)));
+
+ if ((S_GET_SEGMENT (sub_symbolP) == absolute_section))
+ add_number -= S_GET_VALUE (sub_symbolP);
+
+#ifdef DIFF_EXPR_OK
+ else if (S_GET_SEGMENT (sub_symbolP) == this_segment_type
+#if 0 /* Do this even if it's already described as pc-relative. For example,
+ on the m68k, an operand of "pc@(foo-.-2)" should address "foo" in a
+ pc-relative mode. */
+ && pcrel
+#endif
+ )
+ {
+ /* Make it pc-relative. */
+ add_number += (MD_PCREL_FROM_SECTION (fixP, this_segment_type)
+ - S_GET_VALUE (sub_symbolP));
+ pcrel = 1;
+ fixP->fx_pcrel = 1;
+ sub_symbolP = 0;
+ fixP->fx_subsy = 0;
+ }
+#endif
+#ifdef UNDEFINED_DIFFERENCE_OK
+ /* The PA needs this for PIC code generation. We basically
+ don't want to do anything if we have the difference of two
+ symbols at this point. */
+ else if (1)
+ {
+ /* Leave it alone. */
+ }
+#endif
+#ifdef BFD_ASSEMBLER
+ else if (fixP->fx_r_type == BFD_RELOC_GPREL32
+ || fixP->fx_r_type == BFD_RELOC_GPREL16)
+ {
+ /* Leave it alone. */
+ }
+#endif
+ else
+ {
+ char buf[50];
+ sprint_value (buf, fragP->fr_address + where);
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("Subtraction of two symbols in different sections \"%s\" {%s section} - \"%s\" {%s section} at file address %s."),
+ S_GET_NAME (add_symbolP),
+ segment_name (S_GET_SEGMENT (add_symbolP)),
+ S_GET_NAME (sub_symbolP),
+ segment_name (S_GET_SEGMENT (sub_symbolP)),
+ buf);
+ }
+ }
+ }
+
+ if (add_symbolP)
+ {
+ if (add_symbol_segment == this_segment_type && pcrel && !plt
+ && TC_RELOC_RTSYM_LOC_FIXUP (fixP))
+ {
+ /*
+ * This fixup was made when the symbol's segment was
+ * SEG_UNKNOWN, but it is now in the local segment.
+ * So we know how to do the address without relocation.
+ */
+#ifdef TC_I960
+ /* reloc_callj() may replace a 'call' with a 'calls' or a
+ 'bal', in which cases it modifies *fixP as appropriate.
+ In the case of a 'calls', no further work is required,
+ and *fixP has been set up to make the rest of the code
+ below a no-op. */
+ reloc_callj (fixP);
+#endif /* TC_I960 */
+
+ add_number += S_GET_VALUE (add_symbolP);
+ add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type);
+ pcrel = 0; /* Lie. Don't want further pcrel processing. */
+
+ /* Let the target machine make the final determination
+ as to whether or not a relocation will be needed to
+ handle this fixup. */
+ if (!TC_FORCE_RELOCATION (fixP))
+ {
+ fixP->fx_pcrel = 0;
+ fixP->fx_addsy = NULL;
+ }
+ }
+ else
+ {
+ if (add_symbol_segment == absolute_section
+ && ! pcrel)
+ {
+#ifdef TC_I960
+ /* See comment about reloc_callj() above. */
+ reloc_callj (fixP);
+#endif /* TC_I960 */
+ add_number += S_GET_VALUE (add_symbolP);
+
+ /* Let the target machine make the final determination
+ as to whether or not a relocation will be needed to
+ handle this fixup. */
+
+ if (!TC_FORCE_RELOCATION (fixP))
+ {
+ fixP->fx_addsy = NULL;
+ add_symbolP = NULL;
+ }
+ }
+ else if (add_symbol_segment == undefined_section
+#ifdef BFD_ASSEMBLER
+ || bfd_is_com_section (add_symbol_segment)
+#endif
+ )
+ {
+#ifdef TC_I960
+ if ((int) fixP->fx_bit_fixP == 13)
+ {
+ /* This is a COBR instruction. They have only a
+ * 13-bit displacement and are only to be used
+ * for local branches: flag as error, don't generate
+ * relocation.
+ */
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("can't use COBR format with external label"));
+ fixP->fx_addsy = NULL;
+ fixP->fx_done = 1;
+ continue;
+ } /* COBR */
+#endif /* TC_I960 */
+
+#ifdef OBJ_COFF
+#ifdef TE_I386AIX
+ if (S_IS_COMMON (add_symbolP))
+ add_number += S_GET_VALUE (add_symbolP);
+#endif /* TE_I386AIX */
+#endif /* OBJ_COFF */
+ ++seg_reloc_count;
+ }
+ else
+ {
+ seg_reloc_count++;
+#if !(defined (TC_V850) && defined (OBJ_ELF))
+#if !(defined (TC_M68K) && defined (OBJ_ELF))
+#if !(defined (TC_ARM) && defined (OBJ_ELF))
+#if !(defined (TC_I960) && defined (OBJ_ELF))
+#if !defined (TC_I386) || !(defined (OBJ_ELF) || defined (OBJ_COFF)) || defined (TE_PE)
+ add_number += S_GET_VALUE (add_symbolP);
+#endif
+#endif
+#endif
+#endif
+#endif
+ }
+ }
+ }
+
+ if (pcrel)
+ {
+ add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment_type);
+ if (add_symbolP == 0)
+ {
+#ifndef BFD_ASSEMBLER
+ fixP->fx_addsy = &abs_symbol;
+#else
+ fixP->fx_addsy = section_symbol (absolute_section);
+#endif
+ symbol_mark_used_in_reloc (fixP->fx_addsy);
+ ++seg_reloc_count;
+ }
+ }
+
+ if (!fixP->fx_done)
+ {
+#ifdef MD_APPLY_FIX3
+ md_apply_fix3 (fixP, &add_number, this_segment_type);
+#else
+#ifdef BFD_ASSEMBLER
+ md_apply_fix (fixP, &add_number);
+#else
+ md_apply_fix (fixP, add_number);
+#endif
+#endif
+
+#ifndef TC_HANDLES_FX_DONE
+ /* If the tc-* files haven't been converted, assume it's handling
+ it the old way, where a null fx_addsy means that the fix has
+ been applied completely, and no further work is needed. */
+ if (fixP->fx_addsy == 0 && fixP->fx_pcrel == 0)
+ fixP->fx_done = 1;
+#endif
+ }
+
+ if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && size > 0)
+ {
+ if ((size_t) size < sizeof (valueT))
+ {
+ valueT mask, hibit;
+
+ /* set all bits to one */
+ mask = 0;
+ mask--;
+ /* Technically, combining these produces an undefined result
+ if size is sizeof (valueT), though I think these two
+ half-way operations should both be defined. And the
+ compiler should be able to combine them if it's valid on
+ the host architecture. */
+ mask <<= size * 4;
+ mask <<= size * 4;
+ hibit = (valueT) 1 << (size * 8 - 1);
+ if (((add_number & mask) != 0
+ || (fixP->fx_signed
+ && (add_number & hibit) != 0))
+ && ((add_number & mask) != mask
+ || (add_number & hibit) == 0))
+ {
+ char buf[50], buf2[50];
+ sprint_value (buf, fragP->fr_address + where);
+ if (add_number > 1000)
+ sprint_value (buf2, add_number);
+ else
+ sprintf (buf2, "%ld", (long) add_number);
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("Value of %s too large for field of %d bytes at %s"),
+ buf2, size, buf);
+ } /* generic error checking */
+ }
+#ifdef WARN_SIGNED_OVERFLOW_WORD
+ /* Warn if a .word value is too large when treated as a signed
+ number. We already know it is not too negative. This is to
+ catch over-large switches generated by gcc on the 68k. */
+ if (!flag_signed_overflow_ok
+ && size == 2
+ && add_number > 0x7fff)
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ _("Signed .word overflow; switch may be too large; %ld at 0x%lx"),
+ (long) add_number,
+ (unsigned long) (fragP->fr_address + where));
+#endif
+ } /* not a bit fix */
+
+#ifdef TC_VALIDATE_FIX
+ skip: ;
+#endif
+#ifdef DEBUG5
+ fprintf (stderr, "result:\n");
+ print_fixup (fixP);
+#endif
+ } /* For each fixS in this segment. */
+
+ TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
+ return seg_reloc_count;
+}
+
+#endif /* defined (BFD_ASSEMBLER) || (!defined (BFD) && !defined (OBJ_VMS)) */
+
+void
+number_to_chars_bigendian (buf, val, n)
+ char *buf;
+ valueT val;
+ int n;
+{
+ if ((size_t) n > sizeof (val) || n <= 0)
+ abort ();
+ while (n--)
+ {
+ buf[n] = val & 0xff;
+ val >>= 8;
+ }
+}
+
+void
+number_to_chars_littleendian (buf, val, n)
+ char *buf;
+ valueT val;
+ int n;
+{
+ if ((size_t) n > sizeof (val) || n <= 0)
+ abort ();
+ while (n--)
+ {
+ *buf++ = val & 0xff;
+ val >>= 8;
+ }
+}
+
+void
+write_print_statistics (file)
+ FILE *file;
+{
+ fprintf (file, "fixups: %d\n", n_fixups);
+}
+
+/* for debugging */
+extern int indent_level;
+
+void
+print_fixup (fixp)
+ fixS *fixp;
+{
+ indent_level = 1;
+ fprintf (stderr, "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line);
+ if (fixp->fx_pcrel)
+ fprintf (stderr, " pcrel");
+ if (fixp->fx_pcrel_adjust)
+ fprintf (stderr, " pcrel_adjust=%d", fixp->fx_pcrel_adjust);
+ if (fixp->fx_im_disp)
+ {
+#ifdef TC_NS32K
+ fprintf (stderr, " im_disp=%d", fixp->fx_im_disp);
+#else
+ fprintf (stderr, " im_disp");
+#endif
+ }
+ if (fixp->fx_tcbit)
+ fprintf (stderr, " tcbit");
+ if (fixp->fx_done)
+ fprintf (stderr, " done");
+ fprintf (stderr, "\n size=%d frag=%lx where=%ld offset=%lx addnumber=%lx",
+ fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where,
+ (long) fixp->fx_offset, (long) fixp->fx_addnumber);
+#ifdef BFD_ASSEMBLER
+ fprintf (stderr, "\n %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type),
+ fixp->fx_r_type);
+#else
+#ifdef NEED_FX_R_TYPE
+ fprintf (stderr, " r_type=%d", fixp->fx_r_type);
+#endif
+#endif
+ if (fixp->fx_addsy)
+ {
+ fprintf (stderr, "\n +<");
+ print_symbol_value_1 (stderr, fixp->fx_addsy);
+ fprintf (stderr, ">");
+ }
+ if (fixp->fx_subsy)
+ {
+ fprintf (stderr, "\n -<");
+ print_symbol_value_1 (stderr, fixp->fx_subsy);
+ fprintf (stderr, ">");
+ }
+ fprintf (stderr, "\n");
+#ifdef TC_FIX_DATA_PRINT
+ TC_FIX_DATA_PRINT (stderr, fixp);
+#endif
+}
/* end of write.c */
projects / external / binutils.git / blobdiff