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-rw-r--r--bfd/elf32-rl78.c1553
1 files changed, 1553 insertions, 0 deletions
diff --git a/bfd/elf32-rl78.c b/bfd/elf32-rl78.c
new file mode 100644
index 0000000..c969c71
--- /dev/null
+++ b/bfd/elf32-rl78.c
@@ -0,0 +1,1553 @@
+/* Renesas RL78 specific support for 32-bit ELF.
+ Copyright (C) 2011
+ Free Software Foundation, Inc.
+
+ This file is part of BFD, the Binary File Descriptor library.
+
+ This program 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 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "sysdep.h"
+#include "bfd.h"
+#include "bfd_stdint.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/rl78.h"
+#include "libiberty.h"
+
+#define valid_16bit_address(v) ((v) <= 0x0ffff || (v) >= 0xf0000)
+
+#define RL78REL(n,sz,bit,shift,complain,pcrel) \
+ HOWTO (R_RL78_##n, shift, sz, bit, pcrel, 0, complain_overflow_ ## complain, \
+ bfd_elf_generic_reloc, "R_RL78_" #n, FALSE, 0, ~0, FALSE)
+
+/* Note that the relocations around 0x7f are internal to this file;
+ feel free to move them as needed to avoid conflicts with published
+ relocation numbers. */
+
+static reloc_howto_type rl78_elf_howto_table [] =
+{
+ RL78REL (NONE, 0, 0, 0, dont, FALSE),
+ RL78REL (DIR32, 2, 32, 0, signed, FALSE),
+ RL78REL (DIR24S, 2, 24, 0, signed, FALSE),
+ RL78REL (DIR16, 1, 16, 0, dont, FALSE),
+ RL78REL (DIR16U, 1, 16, 0, unsigned, FALSE),
+ RL78REL (DIR16S, 1, 16, 0, signed, FALSE),
+ RL78REL (DIR8, 0, 8, 0, dont, FALSE),
+ RL78REL (DIR8U, 0, 8, 0, unsigned, FALSE),
+ RL78REL (DIR8S, 0, 8, 0, signed, FALSE),
+ RL78REL (DIR24S_PCREL, 2, 24, 0, signed, TRUE),
+ RL78REL (DIR16S_PCREL, 1, 16, 0, signed, TRUE),
+ RL78REL (DIR8S_PCREL, 0, 8, 0, signed, TRUE),
+ RL78REL (DIR16UL, 1, 16, 2, unsigned, FALSE),
+ RL78REL (DIR16UW, 1, 16, 1, unsigned, FALSE),
+ RL78REL (DIR8UL, 0, 8, 2, unsigned, FALSE),
+ RL78REL (DIR8UW, 0, 8, 1, unsigned, FALSE),
+ RL78REL (DIR32_REV, 1, 16, 0, dont, FALSE),
+ RL78REL (DIR16_REV, 1, 16, 0, dont, FALSE),
+ RL78REL (DIR3U_PCREL, 0, 3, 0, dont, TRUE),
+
+ EMPTY_HOWTO (0x13),
+ EMPTY_HOWTO (0x14),
+ EMPTY_HOWTO (0x15),
+ EMPTY_HOWTO (0x16),
+ EMPTY_HOWTO (0x17),
+ EMPTY_HOWTO (0x18),
+ EMPTY_HOWTO (0x19),
+ EMPTY_HOWTO (0x1a),
+ EMPTY_HOWTO (0x1b),
+ EMPTY_HOWTO (0x1c),
+ EMPTY_HOWTO (0x1d),
+ EMPTY_HOWTO (0x1e),
+ EMPTY_HOWTO (0x1f),
+
+ EMPTY_HOWTO (0x20),
+ EMPTY_HOWTO (0x21),
+ EMPTY_HOWTO (0x22),
+ EMPTY_HOWTO (0x23),
+ EMPTY_HOWTO (0x24),
+ EMPTY_HOWTO (0x25),
+ EMPTY_HOWTO (0x26),
+ EMPTY_HOWTO (0x27),
+ EMPTY_HOWTO (0x28),
+ EMPTY_HOWTO (0x29),
+ EMPTY_HOWTO (0x2a),
+ EMPTY_HOWTO (0x2b),
+ EMPTY_HOWTO (0x2c),
+ EMPTY_HOWTO (0x2d),
+
+ EMPTY_HOWTO (0x2e),
+ EMPTY_HOWTO (0x2f),
+ EMPTY_HOWTO (0x30),
+ EMPTY_HOWTO (0x31),
+ EMPTY_HOWTO (0x32),
+ EMPTY_HOWTO (0x33),
+ EMPTY_HOWTO (0x34),
+ EMPTY_HOWTO (0x35),
+ EMPTY_HOWTO (0x36),
+ EMPTY_HOWTO (0x37),
+ EMPTY_HOWTO (0x38),
+ EMPTY_HOWTO (0x39),
+ EMPTY_HOWTO (0x3a),
+ EMPTY_HOWTO (0x3b),
+ EMPTY_HOWTO (0x3c),
+ EMPTY_HOWTO (0x3d),
+ EMPTY_HOWTO (0x3e),
+ EMPTY_HOWTO (0x3f),
+ EMPTY_HOWTO (0x40),
+
+ RL78REL (ABS32, 2, 32, 0, dont, FALSE),
+ RL78REL (ABS24S, 2, 24, 0, signed, FALSE),
+ RL78REL (ABS16, 1, 16, 0, dont, FALSE),
+ RL78REL (ABS16U, 1, 16, 0, unsigned, FALSE),
+ RL78REL (ABS16S, 1, 16, 0, signed, FALSE),
+ RL78REL (ABS8, 0, 8, 0, dont, FALSE),
+ RL78REL (ABS8U, 0, 8, 0, unsigned, FALSE),
+ RL78REL (ABS8S, 0, 8, 0, signed, FALSE),
+ RL78REL (ABS24S_PCREL, 2, 24, 0, signed, TRUE),
+ RL78REL (ABS16S_PCREL, 1, 16, 0, signed, TRUE),
+ RL78REL (ABS8S_PCREL, 0, 8, 0, signed, TRUE),
+ RL78REL (ABS16UL, 1, 16, 0, unsigned, FALSE),
+ RL78REL (ABS16UW, 1, 16, 0, unsigned, FALSE),
+ RL78REL (ABS8UL, 0, 8, 0, unsigned, FALSE),
+ RL78REL (ABS8UW, 0, 8, 0, unsigned, FALSE),
+ RL78REL (ABS32_REV, 2, 32, 0, dont, FALSE),
+ RL78REL (ABS16_REV, 1, 16, 0, dont, FALSE),
+
+#define STACK_REL_P(x) ((x) <= R_RL78_ABS16_REV && (x) >= R_RL78_ABS32)
+
+ EMPTY_HOWTO (0x52),
+ EMPTY_HOWTO (0x53),
+ EMPTY_HOWTO (0x54),
+ EMPTY_HOWTO (0x55),
+ EMPTY_HOWTO (0x56),
+ EMPTY_HOWTO (0x57),
+ EMPTY_HOWTO (0x58),
+ EMPTY_HOWTO (0x59),
+ EMPTY_HOWTO (0x5a),
+ EMPTY_HOWTO (0x5b),
+ EMPTY_HOWTO (0x5c),
+ EMPTY_HOWTO (0x5d),
+ EMPTY_HOWTO (0x5e),
+ EMPTY_HOWTO (0x5f),
+ EMPTY_HOWTO (0x60),
+ EMPTY_HOWTO (0x61),
+ EMPTY_HOWTO (0x62),
+ EMPTY_HOWTO (0x63),
+ EMPTY_HOWTO (0x64),
+ EMPTY_HOWTO (0x65),
+ EMPTY_HOWTO (0x66),
+ EMPTY_HOWTO (0x67),
+ EMPTY_HOWTO (0x68),
+ EMPTY_HOWTO (0x69),
+ EMPTY_HOWTO (0x6a),
+ EMPTY_HOWTO (0x6b),
+ EMPTY_HOWTO (0x6c),
+ EMPTY_HOWTO (0x6d),
+ EMPTY_HOWTO (0x6e),
+ EMPTY_HOWTO (0x6f),
+ EMPTY_HOWTO (0x70),
+ EMPTY_HOWTO (0x71),
+ EMPTY_HOWTO (0x72),
+ EMPTY_HOWTO (0x73),
+ EMPTY_HOWTO (0x74),
+ EMPTY_HOWTO (0x75),
+ EMPTY_HOWTO (0x76),
+ EMPTY_HOWTO (0x77),
+
+ EMPTY_HOWTO (0x78),
+ EMPTY_HOWTO (0x79),
+ EMPTY_HOWTO (0x7a),
+ EMPTY_HOWTO (0x7b),
+ EMPTY_HOWTO (0x7c),
+ EMPTY_HOWTO (0x7d),
+ EMPTY_HOWTO (0x7e),
+ EMPTY_HOWTO (0x7f),
+
+ RL78REL (SYM, 2, 32, 0, dont, FALSE),
+ RL78REL (OPneg, 2, 32, 0, dont, FALSE),
+ RL78REL (OPadd, 2, 32, 0, dont, FALSE),
+ RL78REL (OPsub, 2, 32, 0, dont, FALSE),
+ RL78REL (OPmul, 2, 32, 0, dont, FALSE),
+ RL78REL (OPdiv, 2, 32, 0, dont, FALSE),
+ RL78REL (OPshla, 2, 32, 0, dont, FALSE),
+ RL78REL (OPshra, 2, 32, 0, dont, FALSE),
+ RL78REL (OPsctsize, 2, 32, 0, dont, FALSE),
+ EMPTY_HOWTO (0x89),
+ EMPTY_HOWTO (0x8a),
+ EMPTY_HOWTO (0x8b),
+ EMPTY_HOWTO (0x8c),
+ RL78REL (OPscttop, 2, 32, 0, dont, FALSE),
+ EMPTY_HOWTO (0x8e),
+ EMPTY_HOWTO (0x8f),
+ RL78REL (OPand, 2, 32, 0, dont, FALSE),
+ RL78REL (OPor, 2, 32, 0, dont, FALSE),
+ RL78REL (OPxor, 2, 32, 0, dont, FALSE),
+ RL78REL (OPnot, 2, 32, 0, dont, FALSE),
+ RL78REL (OPmod, 2, 32, 0, dont, FALSE),
+ RL78REL (OPromtop, 2, 32, 0, dont, FALSE),
+ RL78REL (OPramtop, 2, 32, 0, dont, FALSE)
+};
+
+/* Map BFD reloc types to RL78 ELF reloc types. */
+
+struct rl78_reloc_map
+{
+ bfd_reloc_code_real_type bfd_reloc_val;
+ unsigned int rl78_reloc_val;
+};
+
+static const struct rl78_reloc_map rl78_reloc_map [] =
+{
+ { BFD_RELOC_NONE, R_RL78_NONE },
+ { BFD_RELOC_8, R_RL78_DIR8S },
+ { BFD_RELOC_16, R_RL78_DIR16S },
+ { BFD_RELOC_24, R_RL78_DIR24S },
+ { BFD_RELOC_32, R_RL78_DIR32 },
+ { BFD_RELOC_RL78_16_OP, R_RL78_DIR16 },
+ { BFD_RELOC_RL78_DIR3U_PCREL, R_RL78_DIR3U_PCREL },
+ { BFD_RELOC_8_PCREL, R_RL78_DIR8S_PCREL },
+ { BFD_RELOC_16_PCREL, R_RL78_DIR16S_PCREL },
+ { BFD_RELOC_24_PCREL, R_RL78_DIR24S_PCREL },
+ { BFD_RELOC_RL78_8U, R_RL78_DIR8U },
+ { BFD_RELOC_RL78_16U, R_RL78_DIR16U },
+ { BFD_RELOC_RL78_SYM, R_RL78_SYM },
+ { BFD_RELOC_RL78_OP_SUBTRACT, R_RL78_OPsub },
+ { BFD_RELOC_RL78_OP_NEG, R_RL78_OPneg },
+ { BFD_RELOC_RL78_OP_AND, R_RL78_OPand },
+ { BFD_RELOC_RL78_OP_SHRA, R_RL78_OPshra },
+ { BFD_RELOC_RL78_ABS8, R_RL78_ABS8 },
+ { BFD_RELOC_RL78_ABS16, R_RL78_ABS16 },
+ { BFD_RELOC_RL78_ABS16_REV, R_RL78_ABS16_REV },
+ { BFD_RELOC_RL78_ABS32, R_RL78_ABS32 },
+ { BFD_RELOC_RL78_ABS32_REV, R_RL78_ABS32_REV },
+ { BFD_RELOC_RL78_ABS16UL, R_RL78_ABS16UL },
+ { BFD_RELOC_RL78_ABS16UW, R_RL78_ABS16UW },
+ { BFD_RELOC_RL78_ABS16U, R_RL78_ABS16U }
+};
+
+static reloc_howto_type *
+rl78_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
+{
+ unsigned int i;
+
+ if (code == BFD_RELOC_RL78_32_OP)
+ return rl78_elf_howto_table + R_RL78_DIR32;
+
+ for (i = ARRAY_SIZE (rl78_reloc_map); --i;)
+ if (rl78_reloc_map [i].bfd_reloc_val == code)
+ return rl78_elf_howto_table + rl78_reloc_map[i].rl78_reloc_val;
+
+ return NULL;
+}
+
+static reloc_howto_type *
+rl78_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, const char * r_name)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE (rl78_elf_howto_table); i++)
+ if (rl78_elf_howto_table[i].name != NULL
+ && strcasecmp (rl78_elf_howto_table[i].name, r_name) == 0)
+ return rl78_elf_howto_table + i;
+
+ return NULL;
+}
+
+/* Set the howto pointer for an RL78 ELF reloc. */
+
+static void
+rl78_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
+ arelent * cache_ptr,
+ Elf_Internal_Rela * dst)
+{
+ unsigned int r_type;
+
+ r_type = ELF32_R_TYPE (dst->r_info);
+ BFD_ASSERT (r_type < (unsigned int) R_RL78_max);
+ cache_ptr->howto = rl78_elf_howto_table + r_type;
+}
+
+static bfd_vma
+get_symbol_value (const char * name,
+ bfd_reloc_status_type * status,
+ struct bfd_link_info * info,
+ bfd * input_bfd,
+ asection * input_section,
+ int offset)
+{
+ bfd_vma value = 0;
+ struct bfd_link_hash_entry * h;
+
+ h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
+
+ if (h == NULL
+ || (h->type != bfd_link_hash_defined
+ && h->type != bfd_link_hash_defweak))
+ * status = info->callbacks->undefined_symbol
+ (info, name, input_bfd, input_section, offset, TRUE);
+ else
+ value = (h->u.def.value
+ + h->u.def.section->output_section->vma
+ + h->u.def.section->output_offset);
+
+ return value;
+}
+
+static bfd_vma
+get_romstart (bfd_reloc_status_type * status,
+ struct bfd_link_info * info,
+ bfd * abfd,
+ asection * sec,
+ int offset)
+{
+ static bfd_boolean cached = FALSE;
+ static bfd_vma cached_value = 0;
+
+ if (!cached)
+ {
+ cached_value = get_symbol_value ("_start", status, info, abfd, sec, offset);
+ cached = TRUE;
+ }
+ return cached_value;
+}
+
+static bfd_vma
+get_ramstart (bfd_reloc_status_type * status,
+ struct bfd_link_info * info,
+ bfd * abfd,
+ asection * sec,
+ int offset)
+{
+ static bfd_boolean cached = FALSE;
+ static bfd_vma cached_value = 0;
+
+ if (!cached)
+ {
+ cached_value = get_symbol_value ("__datastart", status, info, abfd, sec, offset);
+ cached = TRUE;
+ }
+ return cached_value;
+}
+
+#define NUM_STACK_ENTRIES 16
+static int32_t rl78_stack [ NUM_STACK_ENTRIES ];
+static unsigned int rl78_stack_top;
+
+#define RL78_STACK_PUSH(val) \
+ do \
+ { \
+ if (rl78_stack_top < NUM_STACK_ENTRIES) \
+ rl78_stack [rl78_stack_top ++] = (val); \
+ else \
+ r = bfd_reloc_dangerous; \
+ } \
+ while (0)
+
+#define RL78_STACK_POP(dest) \
+ do \
+ { \
+ if (rl78_stack_top > 0) \
+ (dest) = rl78_stack [-- rl78_stack_top]; \
+ else \
+ (dest) = 0, r = bfd_reloc_dangerous; \
+ } \
+ while (0)
+
+/* Relocate an RL78 ELF section.
+ There is some attempt to make this function usable for many architectures,
+ both USE_REL and USE_RELA ['twould be nice if such a critter existed],
+ if only to serve as a learning tool.
+
+ The RELOCATE_SECTION function is called by the new ELF backend linker
+ to handle the relocations for a section.
+
+ The relocs are always passed as Rela structures; if the section
+ actually uses Rel structures, the r_addend field will always be
+ zero.
+
+ This function is responsible for adjusting the section contents as
+ necessary, and (if using Rela relocs and generating a relocatable
+ output file) adjusting the reloc addend as necessary.
+
+ This function does not have to worry about setting the reloc
+ address or the reloc symbol index.
+
+ LOCAL_SYMS is a pointer to the swapped in local symbols.
+
+ LOCAL_SECTIONS is an array giving the section in the input file
+ corresponding to the st_shndx field of each local symbol.
+
+ The global hash table entry for the global symbols can be found
+ via elf_sym_hashes (input_bfd).
+
+ When generating relocatable output, this function must handle
+ STB_LOCAL/STT_SECTION symbols specially. The output symbol is
+ going to be the section symbol corresponding to the output
+ section, which means that the addend must be adjusted
+ accordingly. */
+
+static bfd_boolean
+rl78_elf_relocate_section
+ (bfd * output_bfd,
+ struct bfd_link_info * info,
+ bfd * input_bfd,
+ asection * input_section,
+ bfd_byte * contents,
+ Elf_Internal_Rela * relocs,
+ Elf_Internal_Sym * local_syms,
+ asection ** local_sections)
+{
+ Elf_Internal_Shdr * symtab_hdr;
+ struct elf_link_hash_entry ** sym_hashes;
+ Elf_Internal_Rela * rel;
+ Elf_Internal_Rela * relend;
+ bfd *dynobj;
+ asection *splt;
+
+ symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (input_bfd);
+ relend = relocs + input_section->reloc_count;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ splt = NULL;
+ if (dynobj != NULL)
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+
+ for (rel = relocs; rel < relend; rel ++)
+ {
+ reloc_howto_type * howto;
+ unsigned long r_symndx;
+ Elf_Internal_Sym * sym;
+ asection * sec;
+ struct elf_link_hash_entry * h;
+ bfd_vma relocation;
+ bfd_reloc_status_type r;
+ const char * name = NULL;
+ bfd_boolean unresolved_reloc = TRUE;
+ int r_type;
+
+ r_type = ELF32_R_TYPE (rel->r_info);
+ r_symndx = ELF32_R_SYM (rel->r_info);
+
+ howto = rl78_elf_howto_table + ELF32_R_TYPE (rel->r_info);
+ h = NULL;
+ sym = NULL;
+ sec = NULL;
+ relocation = 0;
+
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ sec = local_sections [r_symndx];
+ relocation = _bfd_elf_rela_local_sym (output_bfd, sym, & sec, rel);
+
+ name = bfd_elf_string_from_elf_section
+ (input_bfd, symtab_hdr->sh_link, sym->st_name);
+ name = (sym->st_name == 0) ? bfd_section_name (input_bfd, sec) : name;
+ }
+ else
+ {
+ bfd_boolean warned;
+
+ RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+ r_symndx, symtab_hdr, sym_hashes, h,
+ sec, relocation, unresolved_reloc,
+ warned);
+
+ name = h->root.root.string;
+ }
+
+ if (sec != NULL && elf_discarded_section (sec))
+ RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+ rel, relend, howto, contents);
+
+ if (info->relocatable)
+ {
+ /* This is a relocatable link. We don't have to change
+ anything, unless the reloc is against a section symbol,
+ in which case we have to adjust according to where the
+ section symbol winds up in the output section. */
+ if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ rel->r_addend += sec->output_offset;
+ continue;
+ }
+
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_RL78_DIR16S:
+ {
+ bfd_vma *plt_offset;
+
+ if (h != NULL)
+ plt_offset = &h->plt.offset;
+ else
+ plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
+
+ /* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)",
+ relocation, *plt_offset);*/
+ if (valid_16bit_address (relocation))
+ {
+ /* If the symbol is in range for a 16-bit address, we should
+ have deallocated the plt entry in relax_section. */
+ BFD_ASSERT (*plt_offset == (bfd_vma) -1);
+ }
+ else
+ {
+ /* If the symbol is out of range for a 16-bit address,
+ we must have allocated a plt entry. */
+ BFD_ASSERT (*plt_offset != (bfd_vma) -1);
+
+ /* If this is the first time we've processed this symbol,
+ fill in the plt entry with the correct symbol address. */
+ if ((*plt_offset & 1) == 0)
+ {
+ unsigned int x;
+
+ x = 0x000000ec; /* br !!abs24 */
+ x |= (relocation << 8) & 0xffffff00;
+ bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
+ *plt_offset |= 1;
+ }
+
+ relocation = (splt->output_section->vma
+ + splt->output_offset
+ + (*plt_offset & -2));
+ if (name)
+ {
+ char *newname = bfd_malloc (strlen(name)+5);
+ strcpy (newname, name);
+ strcat(newname, ".plt");
+ _bfd_generic_link_add_one_symbol (info,
+ input_bfd,
+ newname,
+ BSF_FUNCTION | BSF_WEAK,
+ splt,
+ (*plt_offset & -2),
+ 0,
+ 1,
+ 0,
+ 0);
+ }
+ }
+ }
+ break;
+ }
+
+ if (h != NULL && h->root.type == bfd_link_hash_undefweak)
+ /* If the symbol is undefined and weak
+ then the relocation resolves to zero. */
+ relocation = 0;
+ else
+ {
+ if (howto->pc_relative)
+ {
+ relocation -= (input_section->output_section->vma
+ + input_section->output_offset
+ + rel->r_offset);
+ relocation -= bfd_get_reloc_size (howto);
+ }
+
+ relocation += rel->r_addend;
+ }
+
+ r = bfd_reloc_ok;
+
+#define RANGE(a,b) if (a > (long) relocation || (long) relocation > b) r = bfd_reloc_overflow
+#define ALIGN(m) if (relocation & m) r = bfd_reloc_other;
+#define OP(i) (contents[rel->r_offset + (i)])
+
+ /* Opcode relocs are always big endian. Data relocs are bi-endian. */
+ switch (r_type)
+ {
+ case R_RL78_NONE:
+ break;
+
+ case R_RL78_DIR8S_PCREL:
+ RANGE (-128, 127);
+ OP (0) = relocation;
+ break;
+
+ case R_RL78_DIR8S:
+ RANGE (-128, 255);
+ OP (0) = relocation;
+ break;
+
+ case R_RL78_DIR8U:
+ RANGE (0, 255);
+ OP (0) = relocation;
+ break;
+
+ case R_RL78_DIR16S_PCREL:
+ RANGE (-32768, 32767);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ break;
+
+ case R_RL78_DIR16S:
+ if ((relocation & 0xf0000) == 0xf0000)
+ relocation &= 0xffff;
+ RANGE (-32768, 65535);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ break;
+
+ case R_RL78_DIR16U:
+ RANGE (0, 65536);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ break;
+
+ case R_RL78_DIR16:
+ RANGE (-32768, 65536);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ break;
+
+ case R_RL78_DIR16_REV:
+ RANGE (-32768, 65536);
+ OP (1) = relocation;
+ OP (0) = relocation >> 8;
+ break;
+
+ case R_RL78_DIR3U_PCREL:
+ RANGE (3, 10);
+ OP (0) &= 0xf8;
+ OP (0) |= relocation & 0x07;
+ break;
+
+ case R_RL78_DIR24S_PCREL:
+ RANGE (-0x800000, 0x7fffff);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ OP (2) = relocation >> 16;
+ break;
+
+ case R_RL78_DIR24S:
+ RANGE (-0x800000, 0x7fffff);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ OP (2) = relocation >> 16;
+ break;
+
+ case R_RL78_DIR32:
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ OP (2) = relocation >> 16;
+ OP (3) = relocation >> 24;
+ break;
+
+ case R_RL78_DIR32_REV:
+ OP (3) = relocation;
+ OP (2) = relocation >> 8;
+ OP (1) = relocation >> 16;
+ OP (0) = relocation >> 24;
+ break;
+
+ /* Complex reloc handling: */
+
+ case R_RL78_ABS32:
+ RL78_STACK_POP (relocation);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ OP (2) = relocation >> 16;
+ OP (3) = relocation >> 24;
+ break;
+
+ case R_RL78_ABS32_REV:
+ RL78_STACK_POP (relocation);
+ OP (3) = relocation;
+ OP (2) = relocation >> 8;
+ OP (1) = relocation >> 16;
+ OP (0) = relocation >> 24;
+ break;
+
+ case R_RL78_ABS24S_PCREL:
+ case R_RL78_ABS24S:
+ RL78_STACK_POP (relocation);
+ RANGE (-0x800000, 0x7fffff);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ OP (2) = relocation >> 16;
+ break;
+
+ case R_RL78_ABS16:
+ RL78_STACK_POP (relocation);
+ RANGE (-32768, 65535);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ break;
+
+ case R_RL78_ABS16_REV:
+ RL78_STACK_POP (relocation);
+ RANGE (-32768, 65535);
+ OP (1) = relocation;
+ OP (0) = relocation >> 8;
+ break;
+
+ case R_RL78_ABS16S_PCREL:
+ case R_RL78_ABS16S:
+ RL78_STACK_POP (relocation);
+ RANGE (-32768, 32767);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ break;
+
+ case R_RL78_ABS16U:
+ RL78_STACK_POP (relocation);
+ RANGE (0, 65536);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ break;
+
+ case R_RL78_ABS16UL:
+ RL78_STACK_POP (relocation);
+ relocation >>= 2;
+ RANGE (0, 65536);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ break;
+
+ case R_RL78_ABS16UW:
+ RL78_STACK_POP (relocation);
+ relocation >>= 1;
+ RANGE (0, 65536);
+ OP (0) = relocation;
+ OP (1) = relocation >> 8;
+ break;
+
+ case R_RL78_ABS8:
+ RL78_STACK_POP (relocation);
+ RANGE (-128, 255);
+ OP (0) = relocation;
+ break;
+
+ case R_RL78_ABS8U:
+ RL78_STACK_POP (relocation);
+ RANGE (0, 255);
+ OP (0) = relocation;
+ break;
+
+ case R_RL78_ABS8UL:
+ RL78_STACK_POP (relocation);
+ relocation >>= 2;
+ RANGE (0, 255);
+ OP (0) = relocation;
+ break;
+
+ case R_RL78_ABS8UW:
+ RL78_STACK_POP (relocation);
+ relocation >>= 1;
+ RANGE (0, 255);
+ OP (0) = relocation;
+ break;
+
+ case R_RL78_ABS8S_PCREL:
+ case R_RL78_ABS8S:
+ RL78_STACK_POP (relocation);
+ RANGE (-128, 127);
+ OP (0) = relocation;
+ break;
+
+ case R_RL78_SYM:
+ if (r_symndx < symtab_hdr->sh_info)
+ RL78_STACK_PUSH (sec->output_section->vma
+ + sec->output_offset
+ + sym->st_value
+ + rel->r_addend);
+ else
+ {
+ if (h != NULL
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak))
+ RL78_STACK_PUSH (h->root.u.def.value
+ + sec->output_section->vma
+ + sec->output_offset
+ + rel->r_addend);
+ else
+ _bfd_error_handler (_("Warning: RL78_SYM reloc with an unknown symbol"));
+ }
+ break;
+
+ case R_RL78_OPneg:
+ {
+ int32_t tmp;
+
+ RL78_STACK_POP (tmp);
+ tmp = - tmp;
+ RL78_STACK_PUSH (tmp);
+ }
+ break;
+
+ case R_RL78_OPadd:
+ {
+ int32_t tmp1, tmp2;
+
+ RL78_STACK_POP (tmp2);
+ RL78_STACK_POP (tmp1);
+ tmp1 += tmp2;
+ RL78_STACK_PUSH (tmp1);
+ }
+ break;
+
+ case R_RL78_OPsub:
+ {
+ int32_t tmp1, tmp2;
+
+ RL78_STACK_POP (tmp2);
+ RL78_STACK_POP (tmp1);
+ tmp2 -= tmp1;
+ RL78_STACK_PUSH (tmp2);
+ }
+ break;
+
+ case R_RL78_OPmul:
+ {
+ int32_t tmp1, tmp2;
+
+ RL78_STACK_POP (tmp2);
+ RL78_STACK_POP (tmp1);
+ tmp1 *= tmp2;
+ RL78_STACK_PUSH (tmp1);
+ }
+ break;
+
+ case R_RL78_OPdiv:
+ {
+ int32_t tmp1, tmp2;
+
+ RL78_STACK_POP (tmp2);
+ RL78_STACK_POP (tmp1);
+ tmp1 /= tmp2;
+ RL78_STACK_PUSH (tmp1);
+ }
+ break;
+
+ case R_RL78_OPshla:
+ {
+ int32_t tmp1, tmp2;
+
+ RL78_STACK_POP (tmp2);
+ RL78_STACK_POP (tmp1);
+ tmp1 <<= tmp2;
+ RL78_STACK_PUSH (tmp1);
+ }
+ break;
+
+ case R_RL78_OPshra:
+ {
+ int32_t tmp1, tmp2;
+
+ RL78_STACK_POP (tmp2);
+ RL78_STACK_POP (tmp1);
+ tmp1 >>= tmp2;
+ RL78_STACK_PUSH (tmp1);
+ }
+ break;
+
+ case R_RL78_OPsctsize:
+ RL78_STACK_PUSH (input_section->size);
+ break;
+
+ case R_RL78_OPscttop:
+ RL78_STACK_PUSH (input_section->output_section->vma);
+ break;
+
+ case R_RL78_OPand:
+ {
+ int32_t tmp1, tmp2;
+
+ RL78_STACK_POP (tmp2);
+ RL78_STACK_POP (tmp1);
+ tmp1 &= tmp2;
+ RL78_STACK_PUSH (tmp1);
+ }
+ break;
+
+ case R_RL78_OPor:
+ {
+ int32_t tmp1, tmp2;
+
+ RL78_STACK_POP (tmp2);
+ RL78_STACK_POP (tmp1);
+ tmp1 |= tmp2;
+ RL78_STACK_PUSH (tmp1);
+ }
+ break;
+
+ case R_RL78_OPxor:
+ {
+ int32_t tmp1, tmp2;
+
+ RL78_STACK_POP (tmp2);
+ RL78_STACK_POP (tmp1);
+ tmp1 ^= tmp2;
+ RL78_STACK_PUSH (tmp1);
+ }
+ break;
+
+ case R_RL78_OPnot:
+ {
+ int32_t tmp;
+
+ RL78_STACK_POP (tmp);
+ tmp = ~ tmp;
+ RL78_STACK_PUSH (tmp);
+ }
+ break;
+
+ case R_RL78_OPmod:
+ {
+ int32_t tmp1, tmp2;
+
+ RL78_STACK_POP (tmp2);
+ RL78_STACK_POP (tmp1);
+ tmp1 %= tmp2;
+ RL78_STACK_PUSH (tmp1);
+ }
+ break;
+
+ case R_RL78_OPromtop:
+ RL78_STACK_PUSH (get_romstart (&r, info, input_bfd, input_section, rel->r_offset));
+ break;
+
+ case R_RL78_OPramtop:
+ RL78_STACK_PUSH (get_ramstart (&r, info, input_bfd, input_section, rel->r_offset));
+ break;
+
+ default:
+ r = bfd_reloc_notsupported;
+ break;
+ }
+
+ if (r != bfd_reloc_ok)
+ {
+ const char * msg = NULL;
+
+ switch (r)
+ {
+ case bfd_reloc_overflow:
+ /* Catch the case of a missing function declaration
+ and emit a more helpful error message. */
+ if (r_type == R_RL78_DIR24S_PCREL)
+ msg = _("%B(%A): error: call to undefined function '%s'");
+ else
+ r = info->callbacks->reloc_overflow
+ (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
+ input_bfd, input_section, rel->r_offset);
+ break;
+
+ case bfd_reloc_undefined:
+ r = info->callbacks->undefined_symbol
+ (info, name, input_bfd, input_section, rel->r_offset,
+ TRUE);
+ break;
+
+ case bfd_reloc_other:
+ msg = _("%B(%A): warning: unaligned access to symbol '%s' in the small data area");
+ break;
+
+ case bfd_reloc_outofrange:
+ msg = _("%B(%A): internal error: out of range error");
+ break;
+
+ case bfd_reloc_notsupported:
+ msg = _("%B(%A): internal error: unsupported relocation error");
+ break;
+
+ case bfd_reloc_dangerous:
+ msg = _("%B(%A): internal error: dangerous relocation");
+ break;
+
+ default:
+ msg = _("%B(%A): internal error: unknown error");
+ break;
+ }
+
+ if (msg)
+ _bfd_error_handler (msg, input_bfd, input_section, name);
+
+ if (! r)
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
+/* Function to set the ELF flag bits. */
+
+static bfd_boolean
+rl78_elf_set_private_flags (bfd * abfd, flagword flags)
+{
+ elf_elfheader (abfd)->e_flags = flags;
+ elf_flags_init (abfd) = TRUE;
+ return TRUE;
+}
+
+static bfd_boolean no_warn_mismatch = FALSE;
+
+void bfd_elf32_rl78_set_target_flags (bfd_boolean);
+
+void
+bfd_elf32_rl78_set_target_flags (bfd_boolean user_no_warn_mismatch)
+{
+ no_warn_mismatch = user_no_warn_mismatch;
+}
+
+/* Merge backend specific data from an object file to the output
+ object file when linking. */
+
+static bfd_boolean
+rl78_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
+{
+ flagword old_flags;
+ flagword new_flags;
+ bfd_boolean error = FALSE;
+
+ new_flags = elf_elfheader (ibfd)->e_flags;
+ old_flags = elf_elfheader (obfd)->e_flags;
+
+ if (!elf_flags_init (obfd))
+ {
+ /* First call, no flags set. */
+ elf_flags_init (obfd) = TRUE;
+ elf_elfheader (obfd)->e_flags = new_flags;
+ }
+
+ return !error;
+}
+
+static bfd_boolean
+rl78_elf_print_private_bfd_data (bfd * abfd, void * ptr)
+{
+ FILE * file = (FILE *) ptr;
+ flagword flags;
+
+ BFD_ASSERT (abfd != NULL && ptr != NULL);
+
+ /* Print normal ELF private data. */
+ _bfd_elf_print_private_bfd_data (abfd, ptr);
+
+ flags = elf_elfheader (abfd)->e_flags;
+ fprintf (file, _("private flags = 0x%lx:"), (long) flags);
+
+ fputc ('\n', file);
+ return TRUE;
+}
+
+/* Return the MACH for an e_flags value. */
+
+static int
+elf32_rl78_machine (bfd * abfd)
+{
+ if ((elf_elfheader (abfd)->e_flags & EF_RL78_CPU_MASK) == EF_RL78_CPU_RL78)
+ return bfd_mach_rl78;
+
+ return 0;
+}
+
+static bfd_boolean
+rl78_elf_object_p (bfd * abfd)
+{
+ bfd_default_set_arch_mach (abfd, bfd_arch_rl78,
+ elf32_rl78_machine (abfd));
+ return TRUE;
+}
+
+#ifdef DEBUG
+void
+rl78_dump_symtab (bfd * abfd, void * internal_syms, void * external_syms)
+{
+ size_t locsymcount;
+ Elf_Internal_Sym * isymbuf;
+ Elf_Internal_Sym * isymend;
+ Elf_Internal_Sym * isym;
+ Elf_Internal_Shdr * symtab_hdr;
+ bfd_boolean free_internal = FALSE, free_external = FALSE;
+ char * st_info_str;
+ char * st_info_stb_str;
+ char * st_other_str;
+ char * st_shndx_str;
+
+ if (! internal_syms)
+ {
+ internal_syms = bfd_malloc (1000);
+ free_internal = 1;
+ }
+ if (! external_syms)
+ {
+ external_syms = bfd_malloc (1000);
+ free_external = 1;
+ }
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ locsymcount = symtab_hdr->sh_size / get_elf_backend_data (abfd)->s->sizeof_sym;
+ if (free_internal)
+ isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ internal_syms, external_syms, NULL);
+ else
+ isymbuf = internal_syms;
+ isymend = isymbuf + locsymcount;
+
+ for (isym = isymbuf ; isym < isymend ; isym++)
+ {
+ switch (ELF_ST_TYPE (isym->st_info))
+ {
+ case STT_FUNC: st_info_str = "STT_FUNC";
+ case STT_SECTION: st_info_str = "STT_SECTION";
+ case STT_FILE: st_info_str = "STT_FILE";
+ case STT_OBJECT: st_info_str = "STT_OBJECT";
+ case STT_TLS: st_info_str = "STT_TLS";
+ default: st_info_str = "";
+ }
+ switch (ELF_ST_BIND (isym->st_info))
+ {
+ case STB_LOCAL: st_info_stb_str = "STB_LOCAL";
+ case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL";
+ default: st_info_stb_str = "";
+ }
+ switch (ELF_ST_VISIBILITY (isym->st_other))
+ {
+ case STV_DEFAULT: st_other_str = "STV_DEFAULT";
+ case STV_INTERNAL: st_other_str = "STV_INTERNAL";
+ case STV_PROTECTED: st_other_str = "STV_PROTECTED";
+ default: st_other_str = "";
+ }
+ switch (isym->st_shndx)
+ {
+ case SHN_ABS: st_shndx_str = "SHN_ABS";
+ case SHN_COMMON: st_shndx_str = "SHN_COMMON";
+ case SHN_UNDEF: st_shndx_str = "SHN_UNDEF";
+ default: st_shndx_str = "";
+ }
+
+ printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s "
+ "st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n",
+ isym,
+ (unsigned long) isym->st_value,
+ (unsigned long) isym->st_size,
+ isym->st_name,
+ bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link,
+ isym->st_name),
+ isym->st_info, st_info_str, st_info_stb_str,
+ isym->st_other, st_other_str,
+ isym->st_shndx, st_shndx_str);
+ }
+ if (free_internal)
+ free (internal_syms);
+ if (free_external)
+ free (external_syms);
+}
+
+char *
+rl78_get_reloc (long reloc)
+{
+ if (0 <= reloc && reloc < R_RL78_max)
+ return rl78_elf_howto_table[reloc].name;
+ return "";
+}
+#endif /* DEBUG */
+
+
+/* support PLT for 16-bit references to 24-bit functions. */
+
+/* We support 16-bit pointers to code above 64k by generating a thunk
+ below 64k containing a JMP instruction to the final address. */
+
+static bfd_boolean
+rl78_elf_check_relocs
+ (bfd * abfd,
+ struct bfd_link_info * info,
+ asection * sec,
+ const Elf_Internal_Rela * relocs)
+{
+ Elf_Internal_Shdr * symtab_hdr;
+ struct elf_link_hash_entry ** sym_hashes;
+ const Elf_Internal_Rela * rel;
+ const Elf_Internal_Rela * rel_end;
+ bfd_vma *local_plt_offsets;
+ asection *splt;
+ bfd *dynobj;
+
+ if (info->relocatable)
+ return TRUE;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ local_plt_offsets = elf_local_got_offsets (abfd);
+ splt = NULL;
+ dynobj = elf_hash_table(info)->dynobj;
+
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
+ {
+ struct elf_link_hash_entry *h;
+ unsigned long r_symndx;
+ bfd_vma *offset;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
+ {
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ }
+
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ /* This relocation describes a 16-bit pointer to a function.
+ We may need to allocate a thunk in low memory; reserve memory
+ for it now. */
+ case R_RL78_DIR16S:
+ if (dynobj == NULL)
+ elf_hash_table (info)->dynobj = dynobj = abfd;
+ if (splt == NULL)
+ {
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ if (splt == NULL)
+ {
+ flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED
+ | SEC_READONLY | SEC_CODE);
+ splt = bfd_make_section_with_flags (dynobj, ".plt", flags);
+ if (splt == NULL
+ || ! bfd_set_section_alignment (dynobj, splt, 1))
+ return FALSE;
+ }
+ }
+
+ if (h != NULL)
+ offset = &h->plt.offset;
+ else
+ {
+ if (local_plt_offsets == NULL)
+ {
+ size_t size;
+ unsigned int i;
+
+ size = symtab_hdr->sh_info * sizeof (bfd_vma);
+ local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size);
+ if (local_plt_offsets == NULL)
+ return FALSE;
+ elf_local_got_offsets (abfd) = local_plt_offsets;
+
+ for (i = 0; i < symtab_hdr->sh_info; i++)
+ local_plt_offsets[i] = (bfd_vma) -1;
+ }
+ offset = &local_plt_offsets[r_symndx];
+ }
+
+ if (*offset == (bfd_vma) -1)
+ {
+ *offset = splt->size;
+ splt->size += 4;
+ }
+ break;
+ }
+ }
+
+ return TRUE;
+}
+
+/* This must exist if dynobj is ever set. */
+
+static bfd_boolean
+rl78_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ bfd *dynobj;
+ asection *splt;
+
+ /* As an extra sanity check, verify that all plt entries have
+ been filled in. */
+
+ if ((dynobj = elf_hash_table (info)->dynobj) != NULL
+ && (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL)
+ {
+ bfd_byte *contents = splt->contents;
+ unsigned int i, size = splt->size;
+ for (i = 0; i < size; i += 4)
+ {
+ unsigned int x = bfd_get_32 (dynobj, contents + i);
+ BFD_ASSERT (x != 0);
+ }
+ }
+
+ return TRUE;
+}
+
+static bfd_boolean
+rl78_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ bfd *dynobj;
+ asection *splt;
+
+ if (info->relocatable)
+ return TRUE;
+
+ dynobj = elf_hash_table (info)->dynobj;
+ if (dynobj == NULL)
+ return TRUE;
+
+ splt = bfd_get_section_by_name (dynobj, ".plt");
+ BFD_ASSERT (splt != NULL);
+
+ splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size);
+ if (splt->contents == NULL)
+ return FALSE;
+
+ return TRUE;
+}
+
+
+
+/* Handle relaxing. */
+
+/* A subroutine of rl78_elf_relax_section. If the global symbol H
+ is within the low 64k, remove any entry for it in the plt. */
+
+struct relax_plt_data
+{
+ asection *splt;
+ bfd_boolean *again;
+};
+
+static bfd_boolean
+rl78_relax_plt_check (struct elf_link_hash_entry *h,
+ PTR xdata)
+{
+ struct relax_plt_data *data = (struct relax_plt_data *) xdata;
+
+ if (h->plt.offset != (bfd_vma) -1)
+ {
+ bfd_vma address;
+
+ if (h->root.type == bfd_link_hash_undefined
+ || h->root.type == bfd_link_hash_undefweak)
+ address = 0;
+ else
+ address = (h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset
+ + h->root.u.def.value);
+
+ if (valid_16bit_address (address))
+ {
+ h->plt.offset = -1;
+ data->splt->size -= 4;
+ *data->again = TRUE;
+ }
+ }
+
+ return TRUE;
+}
+
+/* A subroutine of rl78_elf_relax_section. If the global symbol H
+ previously had a plt entry, give it a new entry offset. */
+
+static bfd_boolean
+rl78_relax_plt_realloc (struct elf_link_hash_entry *h,
+ PTR xdata)
+{
+ bfd_vma *entry = (bfd_vma *) xdata;
+
+ if (h->plt.offset != (bfd_vma) -1)
+ {
+ h->plt.offset = *entry;
+ *entry += 4;
+ }
+
+ return TRUE;
+}
+
+static bfd_boolean
+rl78_elf_relax_plt_section (bfd *dynobj,
+ asection *splt,
+ struct bfd_link_info *info,
+ bfd_boolean *again)
+{
+ struct relax_plt_data relax_plt_data;
+ bfd *ibfd;
+
+ /* Assume nothing changes. */
+ *again = FALSE;
+
+ if (info->relocatable)
+ return TRUE;
+
+ /* We only relax the .plt section at the moment. */
+ if (dynobj != elf_hash_table (info)->dynobj
+ || strcmp (splt->name, ".plt") != 0)
+ return TRUE;
+
+ /* Quick check for an empty plt. */
+ if (splt->size == 0)
+ return TRUE;
+
+ /* Map across all global symbols; see which ones happen to
+ fall in the low 64k. */
+ relax_plt_data.splt = splt;
+ relax_plt_data.again = again;
+ elf_link_hash_traverse (elf_hash_table (info), rl78_relax_plt_check,
+ &relax_plt_data);
+
+ /* Likewise for local symbols, though that's somewhat less convenient
+ as we have to walk the list of input bfds and swap in symbol data. */
+ for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
+ {
+ bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Sym *isymbuf = NULL;
+ unsigned int idx;
+
+ if (! local_plt_offsets)
+ continue;
+
+ symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ if (symtab_hdr->sh_info != 0)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ return FALSE;
+ }
+
+ for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
+ {
+ Elf_Internal_Sym *isym;
+ asection *tsec;
+ bfd_vma address;
+
+ if (local_plt_offsets[idx] == (bfd_vma) -1)
+ continue;
+
+ isym = &isymbuf[idx];
+ if (isym->st_shndx == SHN_UNDEF)
+ continue;
+ else if (isym->st_shndx == SHN_ABS)
+ tsec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ tsec = bfd_com_section_ptr;
+ else
+ tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
+
+ address = (tsec->output_section->vma
+ + tsec->output_offset
+ + isym->st_value);
+ if (valid_16bit_address (address))
+ {
+ local_plt_offsets[idx] = -1;
+ splt->size -= 4;
+ *again = TRUE;
+ }
+ }
+
+ if (isymbuf != NULL
+ && symtab_hdr->contents != (unsigned char *) isymbuf)
+ {
+ if (! info->keep_memory)
+ free (isymbuf);
+ else
+ {
+ /* Cache the symbols for elf_link_input_bfd. */
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+ }
+ }
+ }
+
+ /* If we changed anything, walk the symbols again to reallocate
+ .plt entry addresses. */
+ if (*again && splt->size > 0)
+ {
+ bfd_vma entry = 0;
+
+ elf_link_hash_traverse (elf_hash_table (info),
+ rl78_relax_plt_realloc, &entry);
+
+ for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
+ {
+ bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
+ unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
+ unsigned int idx;
+
+ if (! local_plt_offsets)
+ continue;
+
+ for (idx = 0; idx < nlocals; ++idx)
+ if (local_plt_offsets[idx] != (bfd_vma) -1)
+ {
+ local_plt_offsets[idx] = entry;
+ entry += 4;
+ }
+ }
+ }
+
+ return TRUE;
+}
+
+static bfd_boolean
+rl78_elf_relax_section
+ (bfd * abfd,
+ asection * sec,
+ struct bfd_link_info * link_info,
+ bfd_boolean * again)
+{
+ if (abfd == elf_hash_table (link_info)->dynobj
+ && strcmp (sec->name, ".plt") == 0)
+ return rl78_elf_relax_plt_section (abfd, sec, link_info, again);
+
+ /* Assume nothing changes. */
+ *again = FALSE;
+ return TRUE;
+}
+
+
+
+#define ELF_ARCH bfd_arch_rl78
+#define ELF_MACHINE_CODE EM_RL78
+#define ELF_MAXPAGESIZE 0x1000
+
+#define TARGET_LITTLE_SYM bfd_elf32_rl78_vec
+#define TARGET_LITTLE_NAME "elf32-rl78"
+
+#define elf_info_to_howto_rel NULL
+#define elf_info_to_howto rl78_info_to_howto_rela
+#define elf_backend_object_p rl78_elf_object_p
+#define elf_backend_relocate_section rl78_elf_relocate_section
+#define elf_symbol_leading_char ('_')
+#define elf_backend_can_gc_sections 1
+
+#define bfd_elf32_bfd_reloc_type_lookup rl78_reloc_type_lookup
+#define bfd_elf32_bfd_reloc_name_lookup rl78_reloc_name_lookup
+#define bfd_elf32_bfd_set_private_flags rl78_elf_set_private_flags
+#define bfd_elf32_bfd_merge_private_bfd_data rl78_elf_merge_private_bfd_data
+#define bfd_elf32_bfd_print_private_bfd_data rl78_elf_print_private_bfd_data
+
+#define bfd_elf32_bfd_relax_section rl78_elf_relax_section
+#define elf_backend_check_relocs rl78_elf_check_relocs
+#define elf_backend_always_size_sections \
+ rl78_elf_always_size_sections
+#define elf_backend_finish_dynamic_sections \
+ rl78_elf_finish_dynamic_sections
+
+#include "elf32-target.h"
generated by cgit v1.1 at 2024-12-12 19:07:48 +0000