* coff-h8300.c (h8300_reloc16_extra_cases): Make name a const
pointer. (h8300_bfd_link_add_symbols): Likewise.
This commit is contained in:
Ian Lance Taylor
parent
370181a2ae
commit
142aa7d93a
2 changed files with 124 additions and 3 deletions
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@ -1,3 +1,9 @@
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Tue Jun 18 13:54:18 1996 Ian Lance Taylor <ian@cygnus.com>
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* coff-h8300.c (h8300_reloc16_extra_cases): Make name a const
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pointer.
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(h8300_bfd_link_add_symbols): Likewise.
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Mon Jun 17 10:06:50 1996 Jeffrey A. Law <law@rtl.cygnus.com>
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* som.h (R_HPPA_BEGIN_TRY, R_HPPA_END_TRY): Define.
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121
bfd/coff-h8300.c
121
bfd/coff-h8300.c
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@ -247,6 +247,9 @@ static reloc_howto_type howto_table[] =
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HOWTO (R_MOVL2, 0, 1, 16, false, 0, complain_overflow_bitfield, special, "32/24 relaxed move", false, 0x0000ffff, 0x0000ffff, false),
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HOWTO (R_BCC_INV, 0, 0, 8, true, 0, complain_overflow_signed, special, "DISP8 inverted", false, 0x000000ff, 0x000000ff, true),
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HOWTO (R_JMP_DEL, 0, 0, 8, true, 0, complain_overflow_signed, special, "Deleted jump", false, 0x000000ff, 0x000000ff, true),
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};
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@ -340,6 +343,12 @@ rtype2howto (internal, dst)
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case R_MOVL2:
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internal->howto = howto_table + 17;
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break;
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case R_BCC_INV:
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internal->howto = howto_table + 18;
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break;
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case R_JMP_DEL:
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internal->howto = howto_table + 19;
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break;
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default:
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abort ();
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break;
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@ -387,6 +396,33 @@ reloc_processing (relent, reloc, symbols, abfd, section)
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/* relent->section = 0;*/
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}
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static boolean
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h8300_symbol_address_p (abfd, input_section, address)
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bfd *abfd;
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asection *input_section;
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bfd_vma address;
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{
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asymbol **s;
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s = _bfd_generic_link_get_symbols (abfd);
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BFD_ASSERT (s != (asymbol **) NULL);
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/* Search all the symbols for one in INPUT_SECTION with
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address ADDRESS. */
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while (*s)
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{
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asymbol *p = *s;
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if (p->section == input_section
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&& (input_section->output_section->vma
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+ input_section->output_offset
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+ p->value) == address)
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return true;
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s++;
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}
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return false;
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}
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/* If RELOC represents a relaxable instruction/reloc, change it into
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the relaxed reloc, notify the linker that symbol addresses
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have changed (bfd_perform_slip) and return how much the current
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@ -406,6 +442,8 @@ h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info)
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bfd_vma value;
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bfd_vma dot;
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bfd_vma gap;
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static asection *last_input_section = NULL;
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static arelent *last_reloc = NULL;
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/* The address of the thing to be relocated will have moved back by
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the size of the shrink - but we don't change reloc->address here,
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@ -413,6 +451,9 @@ h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info)
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uncooked section. */
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bfd_vma address = reloc->address - shrink;
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if (input_section != last_input_section)
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last_reloc = NULL;
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/* Only examine the relocs which might be relaxable. */
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switch (reloc->howto->type)
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{
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@ -436,9 +477,45 @@ h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info)
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/* If the distance is within -128..+128 inclusive, then we can relax
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this jump. +128 is valid since the target will move two bytes
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this jump. */
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closer if we do relax this branch. */
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if ((int)gap >= -128 && (int)gap <= 128 )
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{
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/* It's possible we may be able to eliminate this branch entirely;
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if the previous instruction is a branch around this instruction,
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and there's no label at this instruction, then we can reverse
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the condition on the previous branch and eliminate this jump.
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original: new:
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bCC lab1 bCC' lab2
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jmp lab2
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lab1: lab1:
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This saves 4 bytes instead of two, and should be relatively
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common. */
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if (gap <= 126
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&& last_reloc
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&& last_reloc->howto->type == R_PCRBYTE)
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{
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bfd_vma last_value;
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last_value = bfd_coff_reloc16_get_value (last_reloc, link_info,
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input_section) + 1;
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if (last_value == dot + 2
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&& last_reloc->address + 1 == reloc->address
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&& ! h8300_symbol_address_p (abfd, input_section, dot - 2))
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{
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reloc->howto = howto_table + 19;
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last_reloc->howto = howto_table + 18;
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last_reloc->sym_ptr_ptr = reloc->sym_ptr_ptr;
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last_reloc->addend = reloc->addend;
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shrink += 4;
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bfd_perform_slip (abfd, 4, input_section, address);
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break;
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}
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}
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/* Change the reloc type. */
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reloc->howto = reloc->howto + 1;
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@ -552,6 +629,8 @@ h8300_reloc16_estimate(abfd, input_section, reloc, shrink, link_info)
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break;
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}
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last_reloc = reloc;
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last_input_section = input_section;
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return shrink;
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}
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@ -916,6 +995,42 @@ h8300_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
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src_address += 4;
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break;
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case R_BCC_INV:
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/* Get the address of the target of this branch. */
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value = bfd_coff_reloc16_get_value(reloc, link_info, input_section);
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dot = (link_order->offset
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+ dst_address
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+ link_order->u.indirect.section->output_section->vma) + 1;
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gap = value - dot;
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/* Sanity check. */
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if (gap < -128 || gap > 126)
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{
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if (! ((*link_info->callbacks->reloc_overflow)
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(link_info, bfd_asymbol_name (*reloc->sym_ptr_ptr),
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reloc->howto->name, reloc->addend, input_section->owner,
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input_section, reloc->address)))
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abort ();
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}
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/* Everything looks OK. Fix the condition in the instruction, apply
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the relocation, and update the src/dst address appropriately. */
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bfd_put_8 (abfd, bfd_get_8 (abfd, data + dst_address - 1) ^ 1,
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data + dst_address - 1);
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bfd_put_8 (abfd, gap, data + dst_address);
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dst_address++;
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src_address++;
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/* All done. */
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break;
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case R_JMP_DEL:
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src_address += 4;
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break;
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/* An 8bit memory indirect instruction (jmp/jsr).
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There's several things that need to be done to handle
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@ -934,7 +1049,7 @@ h8300_reloc16_extra_cases (abfd, link_info, link_order, reloc, data, src_ptr,
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address in the function vector table. */
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asymbol *symbol;
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bfd_vma value;
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char *name;
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const char *name;
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struct funcvec_hash_entry *h;
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asection *vectors_sec = h8300_coff_hash_table (link_info)->vectors_sec;
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@ -1131,7 +1246,7 @@ h8300_bfd_link_add_symbols(abfd, info)
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{
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arelent *reloc = relocs[i];
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asymbol *symbol = *(reloc->sym_ptr_ptr);
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char *name;
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const char *name;
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/* We've got an indirect reloc. See if we need to add it
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to the function vector table. At this point, we have
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