* objdump.c (syms2): Removed unused variable.
* objdump.c (remove_useless_symbols): New function. * objdump.c (comp): Simplify. * objdump.c (dis-assemble_data): Make simpler and more efficient how we filter out useless symbols: Just filter BEFORE the sort (using remove_useless_symbols). * objdump.c (objdump_print_address): Simplify. Change output syntax to match gdb.
This commit is contained in:
Per Bothner
parent
d4bbd6ace2
commit
3ae36cb686
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@ -1,3 +1,14 @@
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Fri Jun 18 14:29:12 1993 Per Bothner (bothner@deneb.cygnus.com)
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* objdump.c (syms2): Removed unused variable.
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* objdump.c (remove_useless_symbols): New function.
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* objdump.c (comp): Simplify.
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* objdump.c (dis-assemble_data): Make simpler and more
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efficient how we filter out useless symbols: Just filter
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BEFORE the sort (using remove_useless_symbols).
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* objdump.c (objdump_print_address): Simplify.
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Change output syntax to match gdb.
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Thu Jun 17 16:53:56 1993 david d `zoo' zuhn (zoo@cygnus.com)
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* Makefile.in: canonicalize install.sh; for use within
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@ -65,7 +65,6 @@ char *only;
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char *machine = (char *) NULL;
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asymbol **syms;
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asymbol **syms2;
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unsigned int storage;
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@ -180,6 +179,34 @@ DEFUN (slurp_symtab, (abfd),
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return sy;
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}
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/* Filter out (in place) symbols that are useless for dis-assemble.
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Return count of useful symbols. */
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int remove_useless_symbols (syms, count)
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asymbol **syms;
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int count;
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{
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register asymbol **in_ptr = syms;
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register asymbol **out_ptr = syms;
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while ( --count >= 0 )
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{
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asymbol *sym = *in_ptr++;
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if (sym->name == NULL || sym->name[0] == '\0')
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continue;
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if (sym->flags & (BSF_DEBUGGING))
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continue;
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if (sym->section == &bfd_und_section
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|| bfd_is_com_section (sym->section))
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continue;
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*out_ptr++ = sym;
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}
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return out_ptr - syms;
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}
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/* Sort symbols into value order */
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static int
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comp (ap, bp)
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@ -188,29 +215,17 @@ comp (ap, bp)
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{
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asymbol *a = *(asymbol **)ap;
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asymbol *b = *(asymbol **)bp;
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int diff;
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bfd *a_bfd, *b_bfd;
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if (a->name == (char *) NULL || (a->flags & (BSF_DEBUGGING)))
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a_bfd = 0;
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else
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a_bfd = bfd_asymbol_bfd(a);
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if (b->name == (char *) NULL || (b->flags & (BSF_DEBUGGING)))
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b_bfd = 0;
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else
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b_bfd = bfd_asymbol_bfd(b);
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if (a->value > b->value)
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return 1;
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else if (a->value < b->value)
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return -1;
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diff = a_bfd - b_bfd;
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if (diff)
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{
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return -diff;
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}
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diff = a->value - b->value;
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if (diff)
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{
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return diff;
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}
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return a->section - b->section;
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if (a->section > b->section)
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return 1;
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else if (a->section < b->section)
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return -1;
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return 0;
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}
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/* Print the supplied address symbolically if possible */
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@ -230,53 +245,27 @@ objdump_print_address (vma, info)
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int vardiff;
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if (symcount == 0)
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{
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fprintf_vma (info->stream, vma);
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}
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else
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fprintf_vma (info->stream, vma);
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if (symcount > 0)
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{
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while (true)
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{
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asymbol *sym; asection *sym_sec;
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oldthisplace = thisplace;
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thisplace = (max + min) / 2;
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if (thisplace == oldthisplace)
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break;
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vardiff = syms[thisplace]->value - vma;
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sym = syms[thisplace];
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vardiff = sym->value - vma;
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sym_sec = sym->section;
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if (vardiff
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/* Check that the value isn't merely a coincidence.
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(if not checked, we might print some undefined symbol
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for the address 0 rather than "main", for example. */
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|| !(syms[thisplace]->flags & (BSF_GLOBAL|BSF_LOCAL)))
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{
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if (vardiff > 0)
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{
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max = thisplace;
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}
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else
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{
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min = thisplace;
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}
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}
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if (vardiff > 0)
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max = thisplace;
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else if (vardiff < 0)
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min = thisplace;
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else
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{
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/* Totally awesome! the exact right symbol */
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CONST char *match_name = syms[thisplace]->name;
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int sym_len = strlen (match_name);
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/* Avoid "filename.o" as a match */
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if (sym_len > 2
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&& match_name[sym_len - 2] == '.'
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&& match_name[sym_len - 1] == 'o'
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&& thisplace + 1 < symcount
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&& syms[thisplace + 1]->value == vma)
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match_name = syms[thisplace + 1]->name;
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/* Totally awesome! the exact right symbol */
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fprintf_vma (info->stream, vma);
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fprintf (info->stream, " (%s+)0000", syms[thisplace]->name);
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return;
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}
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goto found;
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}
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/* We've run out of places to look, print the symbol before this one
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see if this or the symbol before describes this location the best */
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@ -291,17 +280,17 @@ objdump_print_address (vma, info)
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}
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}
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fprintf_vma (info->stream, vma);
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found:
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fprintf (info->stream, " <%s", syms[thisplace]->name);
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if (syms[thisplace]->value > vma)
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{
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fprintf (info->stream, " (%s-)", syms[thisplace]->name);
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fprintf (info->stream, "%04x", syms[thisplace]->value - vma);
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fprintf (info->stream, "-%04x", syms[thisplace]->value - vma);
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}
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else
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else if (vma > syms[thisplace]->value)
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{
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fprintf (info->stream, " (%s+)", syms[thisplace]->name);
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fprintf (info->stream, "%04x", vma - syms[thisplace]->value);
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fprintf (info->stream, "+%04x", vma - syms[thisplace]->value);
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}
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fprintf (info->stream, ">");
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}
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}
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@ -315,7 +304,6 @@ disassemble_data (abfd)
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bfd_size_type i;
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unsigned int (*print) ()= 0; /* Old style */
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disassembler_ftype disassemble = 0; /* New style */
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unsigned int print_insn_h8300 ();
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enum bfd_architecture a;
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struct disassemble_info disasm_info;
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@ -335,28 +323,11 @@ disassemble_data (abfd)
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syms[i]->value += syms[i]->section->vma;
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}
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/* We keep a copy of the symbols in the original order */
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syms2 = slurp_symtab (abfd);
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symcount = remove_useless_symbols (syms, symcount);
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/* Sort the symbols into section and symbol order */
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(void) qsort (syms, symcount, sizeof (asymbol *), comp);
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/* Find the first useless symbol */
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{
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unsigned int i;
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for (i = 0; i < symcount; i++)
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{
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if (syms[i]->name == (char *) NULL
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|| (syms[i]->flags & BSF_DEBUGGING) != 0)
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{
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symcount = i;
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break;
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}
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}
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}
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if (machine != (char *) NULL)
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{
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info = bfd_scan_arch (machine);
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@ -396,6 +367,12 @@ disassemble_data (abfd)
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case bfd_arch_h8500:
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disassemble = print_insn_h8500;
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break;
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case bfd_arch_h8300:
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if (bfd_get_mach(abfd) == bfd_mach_h8300h)
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disassemble = print_insn_h8300h;
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else
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disassemble = print_insn_h8300;
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break;
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case bfd_arch_sh:
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disassemble = print_insn_sh;
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break;
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@ -737,6 +714,8 @@ display_bfd (abfd)
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dump_relocs (abfd);
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if (dump_section_contents)
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dump_data (abfd);
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/* Note that disassemble_data re-orders the syms table, but that is
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safe - as long as it is done last! */
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if (disassemble)
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disassemble_data (abfd);
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}
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@ -911,6 +890,7 @@ dump_relocs (abfd)
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arelent **p;
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relpp = (arelent **) xmalloc (bfd_get_reloc_upper_bound (abfd, a));
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/* Note that this must be done *before* we sort the syms table. */
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relcount = bfd_canonicalize_reloc (abfd, a, relpp, syms);
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if (relcount == 0)
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{
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