diff options
Diffstat (limited to 'bfd/coff64-rs6000.c')
| -rw-r--r-- | bfd/coff64-rs6000.c | 116 |
1 files changed, 115 insertions, 1 deletions
diff --git a/bfd/coff64-rs6000.c b/bfd/coff64-rs6000.c index b1bc2f5..931a914 100644 --- a/bfd/coff64-rs6000.c +++ b/bfd/coff64-rs6000.c @@ -152,6 +152,42 @@ static boolean xcoff64_generate_rtinit PARAMS ((bfd *, const char *, const char *, boolean)); static boolean xcoff64_bad_format_hook PARAMS ((bfd *, PTR )); +/* Relocation functions */ +static boolean xcoff64_reloc_type_br PARAMS ((XCOFF_RELOC_FUNCTION_ARGS)); + +boolean (*xcoff64_calculate_relocation[XCOFF_MAX_CALCULATE_RELOCATION]) + (XCOFF_RELOC_FUNCTION_ARGS) = +{ + xcoff_reloc_type_pos, /* R_POS (0x00) */ + xcoff_reloc_type_neg, /* R_NEG (0x01) */ + xcoff_reloc_type_rel, /* R_REL (0x02) */ + xcoff_reloc_type_toc, /* R_TOC (0x03) */ + xcoff_reloc_type_fail, /* R_RTB (0x04) */ + xcoff_reloc_type_toc, /* R_GL (0x05) */ + xcoff_reloc_type_toc, /* R_TCL (0x06) */ + xcoff_reloc_type_fail, /* (0x07) */ + xcoff_reloc_type_ba, /* R_BA (0x08) */ + xcoff_reloc_type_fail, /* (0x09) */ + xcoff64_reloc_type_br, /* R_BR (0x0a) */ + xcoff_reloc_type_fail, /* (0x0b) */ + xcoff_reloc_type_pos, /* R_RL (0x0c) */ + xcoff_reloc_type_pos, /* R_RLA (0x0d) */ + xcoff_reloc_type_fail, /* (0x0e) */ + xcoff_reloc_type_noop, /* R_REF (0x0f) */ + xcoff_reloc_type_fail, /* (0x10) */ + xcoff_reloc_type_fail, /* (0x11) */ + xcoff_reloc_type_toc, /* R_TRL (0x12) */ + xcoff_reloc_type_toc, /* R_TRLA (0x13) */ + xcoff_reloc_type_fail, /* R_RRTBI (0x14) */ + xcoff_reloc_type_fail, /* R_RRTBA (0x15) */ + xcoff_reloc_type_ba, /* R_CAI (0x16) */ + xcoff_reloc_type_crel, /* R_CREL (0x17) */ + xcoff_reloc_type_ba, /* R_RBA (0x18) */ + xcoff_reloc_type_ba, /* R_RBAC (0x19) */ + xcoff64_reloc_type_br, /* R_RBR (0x1a) */ + xcoff_reloc_type_ba, /* R_RBRC (0x1b) */ +}; + /* coffcode.h needs these to be defined. */ /* Internalcoff.h and coffcode.h modify themselves based on these flags. */ #define XCOFF64 @@ -1030,6 +1066,84 @@ xcoff64_write_object_contents (abfd) return true; } +static boolean +xcoff64_reloc_type_br (input_bfd, input_section, output_bfd, rel, sym, howto, + val, addend, relocation, contents) + bfd *input_bfd; + asection *input_section; + bfd *output_bfd ATTRIBUTE_UNUSED; + struct internal_reloc *rel; + struct internal_syment *sym ATTRIBUTE_UNUSED; + struct reloc_howto_struct *howto; + bfd_vma val; + bfd_vma addend; + bfd_vma *relocation; + bfd_byte *contents; +{ + struct xcoff_link_hash_entry *h; + + if (0 > rel->r_symndx) + return false; + + h = obj_xcoff_sym_hashes (input_bfd)[rel->r_symndx]; + + /* If we see an R_BR or R_RBR reloc which is jumping to global + linkage code, and it is followed by an appropriate cror nop + instruction, we replace the cror with ld r2,40(r1). This + restores the TOC after the glink code. Contrariwise, if the + call is followed by a ld r2,40(r1), but the call is not + going to global linkage code, we can replace the load with a + cror. */ + if (NULL != h + && bfd_link_hash_defined == h->root.type + && (rel->r_vaddr - input_section->vma + 8 <= + input_section->_cooked_size)) + { + bfd_byte *pnext; + unsigned long next; + + pnext = contents + (rel->r_vaddr - input_section->vma) + 4; + next = bfd_get_32 (input_bfd, pnext); + + /* The _ptrgl function is magic. It is used by the AIX compiler to call + a function through a pointer. */ + if (h->smclas == XMC_GL || strcmp (h->root.root.string, "._ptrgl") == 0) + { + if (next == 0x4def7b82 /* cror 15,15,15 */ + || next == 0x4ffffb82 /* cror 31,31,31 */ + || next == 0x60000000) /* ori r0,r0,0 */ + bfd_put_32 (input_bfd, 0xe8410028, pnext); /* ld r2,40(r1) */ + } + else + { + if (next == 0xe8410028) /* ld r2,40(r1) */ + bfd_put_32 (input_bfd, 0x60000000, pnext); /* ori r0,r0,0 */ + } + } + else if (NULL != h && bfd_link_hash_undefined == h->root.type) + { + /* Normally, this relocation is against a defined symbol. In the + case where this is a partial link and the output section offset + is greater than 2^25, the linker will return an invalid error + message that the relocation has been truncated. Yes it has been + truncated but no it not important. For this case, disable the + overflow checking. */ + howto->complain_on_overflow = complain_overflow_dont; + } + + howto->pc_relative = true; + howto->src_mask &= ~3; + howto->dst_mask = howto->src_mask; + + /* A PC relative reloc includes the section address. */ + addend += input_section->vma; + + *relocation = val + addend; + *relocation -= (input_section->output_section->vma + + input_section->output_offset); + return true; +} + /* This is the relocation function for the PowerPC64. See xcoff_ppc_relocation_section for more information. */ @@ -1146,7 +1260,7 @@ xcoff64_ppc_relocate_section (output_bfd, info, input_bfd, } if (rel->r_type >= XCOFF_MAX_CALCULATE_RELOCATION - || (false == xcoff_calculate_relocation[rel->r_type] + || (false == xcoff64_calculate_relocation[rel->r_type] (input_bfd, input_section, output_bfd, rel, sym, &howto, val, addend, &relocation, contents))) return false; |