From 1fe532cf6090bf2babd3c630e07b3c8f01c2c333 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Fri, 26 Oct 2012 03:40:37 +0000 Subject: PR target/14758 bfd/ * elf32-ppc.c (ppc_elf_reloc_type_lookup): Decode ppc64 _DS bfd_reloc values. Map to corresponding D-form relocs. (is_insn_ds_form, is_insn_qs_form): New functions. (ppc_elf_relocate_section): Validate insn with DS-form or DQ-form fields using D-form reloc. gas/ * config/tc-ppc.c (ppc_setup_opcodes): Fix comment. (md_assemble): Translate to _DS relocs for ppc32 as well as ppc64. (tc_gen_reloc): Handle _DS relocs in ppc32 mode. --- bfd/ChangeLog | 9 +++++++ bfd/elf32-ppc.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 84 insertions(+) (limited to 'bfd') diff --git a/bfd/ChangeLog b/bfd/ChangeLog index c5e0390..42e9e4f 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,12 @@ +2012-10-26 Alan Modra + + PR target/14758 + * elf32-ppc.c (ppc_elf_reloc_type_lookup): Decode ppc64 _DS + bfd_reloc values. Map to corresponding D-form relocs. + (is_insn_ds_form, is_insn_qs_form): New functions. + (ppc_elf_relocate_section): Validate insn with DS-form or DQ-form + fields using D-form reloc. + 2012-10-25 H.J. Lu * elf32-i386.c (elf_i386_size_dynamic_sections): Replace diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c index 3d55ac4..4df92ee 100644 --- a/bfd/elf32-ppc.c +++ b/bfd/elf32-ppc.c @@ -1815,7 +1815,9 @@ ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, case BFD_RELOC_NONE: r = R_PPC_NONE; break; case BFD_RELOC_32: r = R_PPC_ADDR32; break; case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break; + case BFD_RELOC_PPC64_ADDR16_DS: case BFD_RELOC_16: r = R_PPC_ADDR16; break; + case BFD_RELOC_PPC64_ADDR16_LO_DS: case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break; case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break; case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break; @@ -1826,7 +1828,9 @@ ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break; case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break; case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break; + case BFD_RELOC_PPC64_GOT16_DS: case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break; + case BFD_RELOC_PPC64_GOT16_LO_DS: case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break; case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break; case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break; @@ -1837,26 +1841,34 @@ ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break; case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break; case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break; + case BFD_RELOC_PPC64_PLT16_LO_DS: case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break; case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break; case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break; case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break; + case BFD_RELOC_PPC64_SECTOFF_DS: case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break; + case BFD_RELOC_PPC64_SECTOFF_LO_DS: case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break; case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break; case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break; case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break; + case BFD_RELOC_PPC64_TOC16_DS: case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break; case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break; case BFD_RELOC_PPC_TLSGD: r = R_PPC_TLSGD; break; case BFD_RELOC_PPC_TLSLD: r = R_PPC_TLSLD; break; case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break; + case BFD_RELOC_PPC64_TPREL16_DS: case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break; + case BFD_RELOC_PPC64_TPREL16_LO_DS: case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break; case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break; case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break; case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break; + case BFD_RELOC_PPC64_DTPREL16_DS: case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break; + case BFD_RELOC_PPC64_DTPREL16_LO_DS: case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break; case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break; case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break; @@ -7243,6 +7255,21 @@ _bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg) return insn; } +static bfd_boolean +is_insn_ds_form (unsigned int insn) +{ + return ((insn & (0x3f << 26)) == 58u << 26 /* ld,ldu,lwa */ + || (insn & (0x3f << 26)) == 62u << 26 /* std,stdu,stq */ + || (insn & (0x3f << 26)) == 57u << 26 /* lfdp */ + || (insn & (0x3f << 26)) == 61u << 26 /* stfdp */); +} + +static bfd_boolean +is_insn_dq_form (unsigned int insn) +{ + return (insn & (0x3f << 26)) == 56u << 26; /* lq */ +} + /* The RELOCATE_SECTION function is called by the ELF backend linker to handle the relocations for a section. @@ -8788,6 +8815,54 @@ ppc_elf_relocate_section (bfd *output_bfd, Bits 0:15 are not used. */ addend += 0x8000; break; + + case R_PPC_ADDR16: + case R_PPC_ADDR16_LO: + case R_PPC_GOT16: + case R_PPC_GOT16_LO: + case R_PPC_SDAREL16: + case R_PPC_SECTOFF: + case R_PPC_SECTOFF_LO: + case R_PPC_DTPREL16: + case R_PPC_DTPREL16_LO: + case R_PPC_TPREL16: + case R_PPC_TPREL16_LO: + case R_PPC_GOT_TLSGD16: + case R_PPC_GOT_TLSGD16_LO: + case R_PPC_GOT_TLSLD16: + case R_PPC_GOT_TLSLD16_LO: + case R_PPC_GOT_DTPREL16: + case R_PPC_GOT_DTPREL16_LO: + case R_PPC_GOT_TPREL16: + case R_PPC_GOT_TPREL16_LO: + { + /* The 32-bit ABI lacks proper relocations to deal with + certain 64-bit instructions. Prevent damage to bits + that make up part of the insn opcode. */ + unsigned int insn, mask, lobit; + + insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset); + mask = 0; + if (is_insn_ds_form (insn)) + mask = 3; + else if (is_insn_dq_form (insn)) + mask = 15; + else + break; + lobit = mask & (relocation + addend); + if (lobit != 0) + { + addend -= lobit; + info->callbacks->einfo + (_("%P: %H: error: %s against `%s' not a multiple of %u\n"), + input_bfd, input_section, rel->r_offset, + howto->name, sym_name, mask + 1); + bfd_set_error (bfd_error_bad_value); + ret = FALSE; + } + addend += insn & mask; + } + break; } #ifdef DEBUG -- cgit v1.1