diff options
Diffstat (limited to 'bfd/elfxx-mips.c')
| -rw-r--r-- | bfd/elfxx-mips.c | 55 |
1 files changed, 49 insertions, 6 deletions
diff --git a/bfd/elfxx-mips.c b/bfd/elfxx-mips.c index fa99c9d..5dcbcf9 100644 --- a/bfd/elfxx-mips.c +++ b/bfd/elfxx-mips.c @@ -6339,7 +6339,7 @@ mips_elf_perform_relocation (struct bfd_link_info *info, /* Set the field. */ x |= (value & howto->dst_mask); - /* Detect incorrect JALX usage. If required, turn JAL into JALX. */ + /* Detect incorrect JALX usage. If required, turn JAL or BAL into JALX. */ if (!cross_mode_jump_p && jal_reloc_p (r_type)) { bfd_vma opcode = x >> 26; @@ -6393,10 +6393,50 @@ mips_elf_perform_relocation (struct bfd_link_info *info, } else if (cross_mode_jump_p && b_reloc_p (r_type)) { - info->callbacks->einfo - (_("%X%H: Unsupported branch between ISA modes\n"), - input_bfd, input_section, relocation->r_offset); - return TRUE; + bfd_boolean ok = FALSE; + bfd_vma opcode = x >> 16; + bfd_vma jalx_opcode = 0; + bfd_vma addr; + bfd_vma dest; + + if (r_type == R_MICROMIPS_PC16_S1) + { + ok = opcode == 0x4060; + jalx_opcode = 0x3c; + value <<= 1; + } + else if (r_type == R_MIPS_PC16 || r_type == R_MIPS_GNU_REL16_S2) + { + ok = opcode == 0x411; + jalx_opcode = 0x1d; + value <<= 2; + } + + if (bfd_link_pic (info) || !ok) + { + info->callbacks->einfo + (_("%X%H: Unsupported branch between ISA modes\n"), + input_bfd, input_section, relocation->r_offset); + return TRUE; + } + + addr = (input_section->output_section->vma + + input_section->output_offset + + relocation->r_offset + + 4); + dest = addr + (((value & 0x3ffff) ^ 0x20000) - 0x20000); + + if ((addr >> 28) << 28 != (dest >> 28) << 28) + { + info->callbacks->einfo + (_("%X%H: Cannot convert branch between ISA modes " + "to JALX: relocation out of range\n"), + input_bfd, input_section, relocation->r_offset); + return TRUE; + } + + /* Make this the JALX opcode. */ + x = ((dest >> 2) & 0x3ffffff) | jalx_opcode << 26; } /* Try converting JAL to BAL and J(AL)R to B(AL), if the target is in @@ -10390,7 +10430,10 @@ _bfd_mips_elf_relocate_section (bfd *output_bfd, struct bfd_link_info *info, ? _("Jump to a non-word-aligned address") : _("Jump to a non-instruction-aligned address"))); else if (b_reloc_p (howto->type)) - msg = _("Branch to a non-instruction-aligned address"); + msg = (cross_mode_jump_p + ? _("Cannot convert a branch to JALX " + "for a non-word-aligned address") + : _("Branch to a non-instruction-aligned address")); else if (aligned_pcrel_reloc_p (howto->type)) msg = _("PC-relative load from unaligned address"); if (msg) |