/* BFD back-end for PowerPC Microsoft Portable Executable files. Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc. Original version pieced together by Kim Knuttila (krk@cygnus.com) There is nothing new under the sun. This file draws a lot on other coff files, in particular, those for the rs/6000, alpha, mips, and intel backends, and the PE work for the arm. 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Current State: - objdump works - relocs generated by gas */ #include "bfd.h" #include "sysdep.h" #include "libbfd.h" #include "obstack.h" #include "coff/powerpc.h" #include "coff/internal.h" #include "coff/pe.h" #ifdef BADMAG #undef BADMAG #endif #define BADMAG(x) PPCBADMAG(x) #include "libcoff.h" /* The main body of code is in coffcode.h. */ #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3) /* In case we're on a 32-bit machine, construct a 64-bit "-1" value from smaller values. Start with zero, widen, *then* decrement. */ #define MINUS_ONE (((bfd_vma)0) - 1) /* these should definitely go in a header file somewhere... */ /* NOP */ #define IMAGE_REL_PPC_ABSOLUTE 0x0000 /* 64-bit address */ #define IMAGE_REL_PPC_ADDR64 0x0001 /* 32-bit address */ #define IMAGE_REL_PPC_ADDR32 0x0002 /* 26-bit address, shifted left 2 (branch absolute) */ #define IMAGE_REL_PPC_ADDR24 0x0003 /* 16-bit address */ #define IMAGE_REL_PPC_ADDR16 0x0004 /* 16-bit address, shifted left 2 (load doubleword) */ #define IMAGE_REL_PPC_ADDR14 0x0005 /* 26-bit PC-relative offset, shifted left 2 (branch relative) */ #define IMAGE_REL_PPC_REL24 0x0006 /* 16-bit PC-relative offset, shifted left 2 (br cond relative) */ #define IMAGE_REL_PPC_REL14 0x0007 /* 16-bit offset from TOC base */ #define IMAGE_REL_PPC_TOCREL16 0x0008 /* 16-bit offset from TOC base, shifted left 2 (load doubleword) */ #define IMAGE_REL_PPC_TOCREL14 0x0009 /* 32-bit addr w/o image base */ #define IMAGE_REL_PPC_ADDR32NB 0x000A /* va of containing section (as in an image sectionhdr) */ #define IMAGE_REL_PPC_SECREL 0x000B /* sectionheader number */ #define IMAGE_REL_PPC_SECTION 0x000C /* substitute TOC restore instruction iff symbol is glue code */ #define IMAGE_REL_PPC_IFGLUE 0x000D /* symbol is glue code; virtual address is TOC restore instruction */ #define IMAGE_REL_PPC_IMGLUE 0x000E /* va of containing section (limited to 16 bits) */ #define IMAGE_REL_PPC_SECREL16 0x000F /* stuff to handle immediate data when the number of bits in the */ /* data is greater than the number of bits in the immediate field */ /* We need to do (usually) 32 bit arithmetic on 16 bit chunks */ #define IMAGE_REL_PPC_REFHI 0x0010 #define IMAGE_REL_PPC_REFLO 0x0011 #define IMAGE_REL_PPC_PAIR 0x0012 /* Flag bits in IMAGE_RELOCATION.TYPE */ /* subtract reloc value rather than adding it */ #define IMAGE_REL_PPC_NEG 0x0100 /* fix branch prediction bit to predict branch taken */ #define IMAGE_REL_PPC_BRTAKEN 0x0200 /* fix branch prediction bit to predict branch not taken */ #define IMAGE_REL_PPC_BRNTAKEN 0x0400 /* toc slot defined in file (or, data in toc) */ #define IMAGE_REL_PPC_TOCDEFN 0x0800 /* masks to isolate above values in IMAGE_RELOCATION.Type */ #define IMAGE_REL_PPC_TYPEMASK 0x00FF #define IMAGE_REL_PPC_FLAGMASK 0x0F00 #define EXTRACT_TYPE(x) ((x) & IMAGE_REL_PPC_TYPEMASK) #define EXTRACT_FLAGS(x) ((x) & IMAGE_REL_PPC_FLAGMASK) #define EXTRACT_JUNK(x) \ ((x) & ~(IMAGE_REL_PPC_TYPEMASK | IMAGE_REL_PPC_FLAGMASK)) /* static helper functions to make relocation work */ /* (Work In Progress) */ static bfd_reloc_status_type ppc_refhi_reloc PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data, asection *section, bfd *output_bfd, char **error)); static bfd_reloc_status_type ppc_reflo_reloc PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data, asection *section, bfd *output_bfd, char **error)); static bfd_reloc_status_type ppc_pair_reloc PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data, asection *section, bfd *output_bfd, char **error)); static bfd_reloc_status_type ppc_toc16_reloc PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data, asection *section, bfd *output_bfd, char **error)); static bfd_reloc_status_type ppc_addr32nb_reloc PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data, asection *section, bfd *output_bfd, char **error)); static bfd_reloc_status_type ppc_section_reloc PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data, asection *section, bfd *output_bfd, char **error)); static bfd_reloc_status_type ppc_secrel_reloc PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data, asection *section, bfd *output_bfd, char **error)); static bfd_reloc_status_type ppc_imglue_reloc PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data, asection *section, bfd *output_bfd, char **error)); /* FIXME: It'll take a while to get through all of these. I only need a few to get us started, so those I'll make sure work. Those marked FIXME are either completely unverified or have a specific unknown marked in the comment */ /*---------------------------------------------------------------------------*/ /* */ /* Relocation entries for Windows/NT on PowerPC. */ /* */ /* From the document "" we find the following listed as used relocs: */ /* */ /* ABSOLUTE : The noop */ /* ADDR[64|32|16] : fields that hold addresses in data fields or the */ /* 16 bit displacement field on a load/store. */ /* ADDR[24|14] : fields that hold addresses in branch and cond */ /* branches. These represent [26|16] bit addresses. */ /* The low order 2 bits are preserved. */ /* REL[24|14] : branches relative to the Instruction Address */ /* register. These represent [26|16] bit addresses, */ /* as before. The instruction field will be zero, and */ /* the address of the SYM will be inserted at link time. */ /* TOCREL16 : 16 bit displacement field referring to a slot in */ /* toc. */ /* TOCREL14 : 16 bit displacement field, similar to REL14 or ADDR14. */ /* ADDR32NB : 32 bit address relative to the virtual origin. */ /* (On the alpha, this is always a linker generated thunk)*/ /* (i.e. 32bit addr relative to the image base) */ /* SECREL : The value is relative to the start of the section */ /* containing the symbol. */ /* SECTION : access to the header containing the item. Supports the */ /* codeview debugger. */ /* */ /* In particular, note that the document does not indicate that the */ /* relocations listed in the header file are used. */ /* */ /* */ /* */ /*---------------------------------------------------------------------------*/ static reloc_howto_type ppc_coff_howto_table[] = { /* IMAGE_REL_PPC_ABSOLUTE 0x0000 NOP */ /* Unused: */ HOWTO (IMAGE_REL_PPC_ABSOLUTE, /* type */ 0, /* rightshift */ 0, /* size (0 = byte, 1 = short, 2 = long) */ 0, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* dont complain_on_overflow */ 0, /* special_function */ "ABSOLUTE", /* name */ false, /* partial_inplace */ 0x00, /* src_mask */ 0x00, /* dst_mask */ false), /* pcrel_offset */ /* IMAGE_REL_PPC_ADDR64 0x0001 64-bit address */ /* Unused: */ HOWTO(IMAGE_REL_PPC_ADDR64, /* type */ 0, /* rightshift */ 3, /* size (0 = byte, 1 = short, 2 = long) */ 64, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "ADDR64", /* name */ true, /* partial_inplace */ MINUS_ONE, /* src_mask */ MINUS_ONE, /* dst_mask */ false), /* pcrel_offset */ /* IMAGE_REL_PPC_ADDR32 0x0002 32-bit address */ /* Used: */ HOWTO (IMAGE_REL_PPC_ADDR32, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "ADDR32", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* IMAGE_REL_PPC_ADDR24 0x0003 26-bit address, shifted left 2 (branch absolute) */ /* the LI field is in bit 6 through bit 29 is 24 bits, + 2 for the shift */ /* Of course, That's the IBM approved bit numbering, which is not what /* anyone else uses.... The li field is in bit 2 thru 25 */ /* Used: */ HOWTO (IMAGE_REL_PPC_ADDR24, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 26, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "ADDR24", /* name */ true, /* partial_inplace */ 0x07fffffc, /* src_mask */ 0x07fffffc, /* dst_mask */ false), /* pcrel_offset */ /* IMAGE_REL_PPC_ADDR16 0x0004 16-bit address */ /* Used: */ HOWTO (IMAGE_REL_PPC_ADDR16, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ 0, /* special_function */ "ADDR16", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* IMAGE_REL_PPC_ADDR14 0x0005 */ /* 16-bit address, shifted left 2 (load doubleword) */ /* FIXME: the mask is likely wrong, and the bit position may be as well */ /* Unused: */ HOWTO (IMAGE_REL_PPC_ADDR14, /* type */ 1, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ 0, /* special_function */ "ADDR16", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* IMAGE_REL_PPC_REL24 0x0006 */ /* 26-bit PC-relative offset, shifted left 2 (branch relative) */ /* Used: */ HOWTO (IMAGE_REL_PPC_REL24, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 26, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ 0, /* special_function */ "REL24", /* name */ true, /* partial_inplace */ 0x3fffffc, /* src_mask */ 0x3fffffc, /* dst_mask */ false), /* pcrel_offset */ /* IMAGE_REL_PPC_REL14 0x0007 */ /* 16-bit PC-relative offset, shifted left 2 (br cond relative) */ /* FIXME: the mask is likely wrong, and the bit position may be as well */ /* FIXME: how does it know how far to shift? */ /* Unused: */ HOWTO (IMAGE_REL_PPC_ADDR14, /* type */ 1, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ 0, /* special_function */ "ADDR16", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ true), /* pcrel_offset */ /* IMAGE_REL_PPC_TOCREL16 0x0008 */ /* 16-bit offset from TOC base */ /* Used: */ HOWTO (IMAGE_REL_PPC_TOCREL16,/* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ ppc_toc16_reloc, /* special_function */ "TOCREL16", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* IMAGE_REL_PPC_TOCREL14 0x0009 */ /* 16-bit offset from TOC base, shifted left 2 (load doubleword) */ /* Unused: */ HOWTO (IMAGE_REL_PPC_TOCREL14,/* type */ 1, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ 0, /* special_function */ "TOCREL14", /* name */ false, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ true), /* pcrel_offset */ /* IMAGE_REL_PPC_ADDR32NB 0x000A */ /* 32-bit addr w/ image base */ /* Unused: */ HOWTO (IMAGE_REL_PPC_ADDR32NB,/* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ ppc_addr32nb_reloc, /* special_function */ "ADDR32NB", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ true), /* pcrel_offset */ /* IMAGE_REL_PPC_SECREL 0x000B */ /* va of containing section (as in an image sectionhdr) */ /* Unused: */ HOWTO (IMAGE_REL_PPC_SECREL,/* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ ppc_secrel_reloc, /* special_function */ "SECREL", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ true), /* pcrel_offset */ /* IMAGE_REL_PPC_SECTION 0x000C */ /* sectionheader number */ /* Unused: */ HOWTO (IMAGE_REL_PPC_SECTION,/* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ ppc_section_reloc, /* special_function */ "SECTION", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ true), /* pcrel_offset */ /* IMAGE_REL_PPC_IFGLUE 0x000D */ /* substitute TOC restore instruction iff symbol is glue code */ /* Used: */ HOWTO (IMAGE_REL_PPC_IFGLUE,/* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ 0, /* special_function */ "IFGLUE", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ true), /* pcrel_offset */ /* IMAGE_REL_PPC_IMGLUE 0x000E */ /* symbol is glue code; virtual address is TOC restore instruction */ /* Unused: */ HOWTO (IMAGE_REL_PPC_IMGLUE,/* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_dont, /* complain_on_overflow */ ppc_imglue_reloc, /* special_function */ "IMGLUE", /* name */ false, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* IMAGE_REL_PPC_SECREL16 0x000F */ /* va of containing section (limited to 16 bits) */ /* Unused: */ HOWTO (IMAGE_REL_PPC_SECREL16,/* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ 0, /* special_function */ "SECREL16", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ true), /* pcrel_offset */ /* IMAGE_REL_PPC_REFHI 0x0010 */ /* Unused: */ HOWTO (IMAGE_REL_PPC_REFHI, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ ppc_refhi_reloc, /* special_function */ "REFHI", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* IMAGE_REL_PPC_REFLO 0x0011 */ /* Unused: */ HOWTO (IMAGE_REL_PPC_REFLO, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ ppc_refhi_reloc, /* special_function */ "REFLO", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* IMAGE_REL_PPC_PAIR 0x0012 */ /* Unused: */ HOWTO (IMAGE_REL_PPC_PAIR, /* type */ 0, /* rightshift */ 1, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ ppc_pair_reloc, /* special_function */ "PAIR", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false) /* pcrel_offset */ }; /* Provided the symbol, returns the value reffed */ static long get_symbol_value PARAMS ((asymbol *)); static long get_symbol_value (symbol) asymbol *symbol; { long relocation = 0; if (bfd_is_com_section (symbol->section)) { relocation = 0; } else { relocation = symbol->value + symbol->section->output_section->vma + symbol->section->output_offset; } return(relocation); } /* this function is in charge of performing all the ppc PE relocations */ /* Don't yet know if we want to do this this particular way ... (krk) */ /* (it is not yet enabled) */ static bfd_reloc_status_type pe_ppc_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd, error_message) bfd *abfd; arelent *reloc_entry; asymbol *symbol_in; PTR data; asection *input_section; bfd *output_bfd; char **error_message; { /* the consth relocation comes in two parts, we have to remember the state between calls, in these variables */ static boolean part1_consth_active = false; static unsigned long part1_consth_value; unsigned long insn; unsigned long sym_value; unsigned long unsigned_value; unsigned short r_type; long signed_value; unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/ bfd_byte *hit_data =addr + (bfd_byte *)(data); r_type = reloc_entry->howto->type; if (output_bfd) { /* Partial linking - do nothing */ reloc_entry->address += input_section->output_offset; return bfd_reloc_ok; } if (symbol_in != NULL && bfd_is_und_section (symbol_in->section)) { /* Keep the state machine happy in case we're called again */ if (r_type == IMAGE_REL_PPC_REFHI) { part1_consth_active = true; part1_consth_value = 0; } return(bfd_reloc_undefined); } if ((part1_consth_active) && (r_type != IMAGE_REL_PPC_PAIR)) { part1_consth_active = false; *error_message = (char *) "Missing PAIR"; return(bfd_reloc_dangerous); } sym_value = get_symbol_value(symbol_in); #if 0 switch (r_type) { case R_IREL: insn = bfd_get_32(abfd, hit_data); /* Take the value in the field and sign extend it */ signed_value = EXTRACT_HWORD(insn); signed_value = SIGN_EXTEND_HWORD(signed_value); signed_value <<= 2; signed_value += sym_value + reloc_entry->addend; if (((signed_value + reloc_entry->address) & ~0x3ffff) == 0) { /* Absolute jmp/call */ insn |= (1<<24); /* Make it absolute */ signed_value += reloc_entry->address; /* FIXME: Should we change r_type to R_IABS */ } else { /* Relative jmp/call, so subtract from the value the address of the place we're coming from */ signed_value -= (input_section->output_section->vma + input_section->output_offset); if (signed_value>0x1ffff || signed_value<-0x20000) return(bfd_reloc_overflow); } signed_value >>= 2; insn = INSERT_HWORD(insn, signed_value); bfd_put_32(abfd, insn ,hit_data); break; case R_ILOHALF: insn = bfd_get_32(abfd, hit_data); unsigned_value = EXTRACT_HWORD(insn); unsigned_value += sym_value + reloc_entry->addend; insn = INSERT_HWORD(insn, unsigned_value); bfd_put_32(abfd, insn, hit_data); break; case R_IHIHALF: insn = bfd_get_32(abfd, hit_data); /* consth, part 1 Just get the symbol value that is referenced */ part1_consth_active = true; part1_consth_value = sym_value + reloc_entry->addend; /* Don't modify insn until R_IHCONST */ break; case R_IHCONST: insn = bfd_get_32(abfd, hit_data); /* consth, part 2 Now relocate the reference */ if (part1_consth_active == false) { *error_message = (char *) "Missing IHIHALF"; return(bfd_reloc_dangerous); } /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */ unsigned_value = 0; /*EXTRACT_HWORD(insn) << 16;*/ unsigned_value += reloc_entry->addend; /* r_symndx */ unsigned_value += part1_consth_value; unsigned_value = unsigned_value >> 16; insn = INSERT_HWORD(insn, unsigned_value); part1_consth_active = false; bfd_put_32(abfd, insn, hit_data); break; case R_BYTE: insn = bfd_get_8(abfd, hit_data); unsigned_value = insn + sym_value + reloc_entry->addend; if (unsigned_value & 0xffffff00) { fprintf(stderr,"Relocation problem : "); fprintf(stderr,"byte value too large in module %s\n", abfd->filename); return(bfd_reloc_overflow); } bfd_put_8(abfd, unsigned_value, hit_data); break; case R_HWORD: insn = bfd_get_16(abfd, hit_data); unsigned_value = insn + sym_value + reloc_entry->addend; if (unsigned_value & 0xffff0000) { fprintf(stderr,"Relocation problem : "); fprintf(stderr,"hword value too large in module %s\n", abfd->filename); return(bfd_reloc_overflow); } bfd_put_16(abfd, insn, hit_data); break; case R_WORD: insn = bfd_get_32(abfd, hit_data); insn += sym_value + reloc_entry->addend; bfd_put_32(abfd, insn, hit_data); break; default: *error_message = "Unrecognized reloc"; return (bfd_reloc_dangerous); } #endif return(bfd_reloc_ok); } /* The reloc processing routine for the optimized COFF linker. */ static boolean coff_ppc_relocate_section (output_bfd, info, input_bfd, input_section, contents, relocs, syms, sections) bfd *output_bfd; struct bfd_link_info *info; bfd *input_bfd; asection *input_section; bfd_byte *contents; struct internal_reloc *relocs; struct internal_syment *syms; asection **sections; { struct internal_reloc *rel; struct internal_reloc *relend; boolean hihalf; bfd_vma hihalf_val; unsigned short r_type = EXTRACT_TYPE (rel->r_type); unsigned short r_flags = EXTRACT_FLAGS(rel->r_type); unsigned short junk = EXTRACT_JUNK (rel->r_type); /* If we are performing a relocateable link, we don't need to do a thing. The caller will take care of adjusting the reloc addresses and symbol indices. */ if (info->relocateable) return true; hihalf = false; hihalf_val = 0; rel = relocs; relend = rel + input_section->reloc_count; for (; rel < relend; rel++) { long symndx; bfd_byte *loc; struct coff_link_hash_entry *h; struct internal_syment *sym; asection *sec; bfd_vma val; boolean overflow; unsigned long insn; long signed_value; unsigned long unsigned_value; bfd_reloc_status_type rstat; symndx = rel->r_symndx; loc = contents + rel->r_vaddr - input_section->vma; if (symndx == -1) h = NULL; else h = obj_coff_sym_hashes (input_bfd)[symndx]; sym = NULL; sec = NULL; val = 0; overflow = false; switch (r_type) { default: fprintf( stderr, "unsupported reloc %s\n", ppc_coff_howto_table[r_type].name); bfd_set_error (bfd_error_bad_value); return false; case IMAGE_REL_PPC_TOCREL16: case IMAGE_REL_PPC_IFGLUE: case IMAGE_REL_PPC_SECTION: case IMAGE_REL_PPC_SECREL: case IMAGE_REL_PPC_IMGLUE: case IMAGE_REL_PPC_ABSOLUTE: break; case IMAGE_REL_PPC_ADDR16: case IMAGE_REL_PPC_REL24: case IMAGE_REL_PPC_ADDR24: case IMAGE_REL_PPC_ADDR32: case IMAGE_REL_PPC_ADDR32NB: rstat = _bfd_relocate_contents (ppc_coff_howto_table + r_type, input_bfd, val, loc); if (rstat == bfd_reloc_overflow) overflow = true; else if (rstat != bfd_reloc_ok) abort (); break; } if (overflow) { const char *name; char buf[SYMNMLEN + 1]; if (symndx == -1) name = "*ABS*"; else if (h != NULL) name = h->root.root.string; else if (sym == NULL) name = "*unknown*"; else if (sym->_n._n_n._n_zeroes == 0 && sym->_n._n_n._n_offset != 0) name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset; else { strncpy (buf, sym->_n._n_name, SYMNMLEN); buf[SYMNMLEN] = '\0'; name = buf; } if (! ((*info->callbacks->reloc_overflow) (info, name, ppc_coff_howto_table[r_type].name, (bfd_vma) 0, input_bfd, input_section, rel->r_vaddr - input_section->vma))) return false; } } return true; } /* Some really cheezy macros that can be turned on to test stderr :-) */ #ifdef DEBUG_RELOC #define UN_IMPL(x) \ { \ static int i; \ if (i == 0) \ { \ i = 1; \ fprintf(stderr,"Unimplemented Relocation -- %s\n",x); \ } \ } #define DUMP_RELOC(n,r) \ { \ fprintf(stderr,"%s sym %d, addr %d, addend %d\n", \ n, (*(r->sym_ptr_ptr))->name, \ r->address, r->addend); \ } #define DUMP_RELOC2(n,r) \ { \ fprintf(stderr,"%s sym %d, r_vaddr %d\n", \ n, r->r_symndx, r->r_vaddr); \ } #else #define UN_IMPL(x) #define DUMP_RELOC(n,r) #define DUMP_RELOC2(n,r) #endif static bfd_reloc_status_type ppc_refhi_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, error_message) bfd *abfd; arelent *reloc_entry; asymbol *symbol; PTR data; asection *input_section; bfd *output_bfd; char **error_message; { UN_IMPL("REFHI"); DUMP_RELOC("REFHI",reloc_entry); if (output_bfd == (bfd *) NULL) return bfd_reloc_continue; return bfd_reloc_undefined; } static bfd_reloc_status_type ppc_reflo_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, error_message) bfd *abfd; arelent *reloc_entry; asymbol *symbol; PTR data; asection *input_section; bfd *output_bfd; char **error_message; { UN_IMPL("REFLO"); DUMP_RELOC("REFLO",reloc_entry); if (output_bfd == (bfd *) NULL) return bfd_reloc_continue; return bfd_reloc_undefined; } static bfd_reloc_status_type ppc_pair_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, error_message) bfd *abfd; arelent *reloc_entry; asymbol *symbol; PTR data; asection *input_section; bfd *output_bfd; char **error_message; { UN_IMPL("PAIR"); DUMP_RELOC("PAIR",reloc_entry); if (output_bfd == (bfd *) NULL) return bfd_reloc_continue; return bfd_reloc_undefined; } static bfd_reloc_status_type ppc_toc16_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, error_message) bfd *abfd; arelent *reloc_entry; asymbol *symbol; PTR data; asection *input_section; bfd *output_bfd; char **error_message; { UN_IMPL("TOCREL16"); DUMP_RELOC("TOCREL16",reloc_entry); if (output_bfd == (bfd *) NULL) { return bfd_reloc_continue; } return bfd_reloc_ok; } /* ADDR32NB : 32 bit address relative to the virtual origin. */ /* (On the alpha, this is always a linker generated thunk)*/ /* (i.e. 32bit addr relative to the image base) */ /* */ /* */ static bfd_reloc_status_type ppc_addr32nb_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, error_message) bfd *abfd; arelent *reloc_entry; asymbol *symbol; PTR data; asection *input_section; bfd *output_bfd; char **error_message; { UN_IMPL("ADDR32NB"); DUMP_RELOC("ADDR32NB",reloc_entry); return bfd_reloc_ok; } static bfd_reloc_status_type ppc_secrel_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, error_message) bfd *abfd; arelent *reloc_entry; asymbol *symbol; PTR data; asection *input_section; bfd *output_bfd; char **error_message; { UN_IMPL("SECREL"); DUMP_RELOC("SECREL",reloc_entry); if (output_bfd == (bfd *) NULL) return bfd_reloc_continue; return bfd_reloc_ok; } static bfd_reloc_status_type ppc_section_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, error_message) bfd *abfd; arelent *reloc_entry; asymbol *symbol; PTR data; asection *input_section; bfd *output_bfd; char **error_message; { UN_IMPL("SECTION"); DUMP_RELOC("SECTION",reloc_entry); if (output_bfd == (bfd *) NULL) return bfd_reloc_continue; return bfd_reloc_ok; } static bfd_reloc_status_type ppc_imglue_reloc (abfd, reloc_entry, symbol, data, input_section, output_bfd, error_message) bfd *abfd; arelent *reloc_entry; asymbol *symbol; PTR data; asection *input_section; bfd *output_bfd; char **error_message; { UN_IMPL("IMGLUE"); DUMP_RELOC("IMGLUE",reloc_entry); if (output_bfd == (bfd *) NULL) return bfd_reloc_continue; return bfd_reloc_ok; } #define MAX_RELOC_INDEX \ (sizeof(ppc_coff_howto_table) / sizeof(ppc_coff_howto_table[0]) - 1) /* FIXME: There is a possiblity that when we read in a reloc from a file, that there are some bits encoded in the upper portion of the type field. Not yet implemented. */ static void ppc_coff_rtype2howto PARAMS ((arelent *relent, struct internal_reloc *internal)); static void ppc_coff_rtype2howto (relent, internal) arelent *relent; struct internal_reloc *internal; { /* We can encode one of three things in the type field, aside from the type: 1. IMAGE_REL_PPC_NEG - indicates the value field is a subtraction value, rather than an addition value 2. IMAGE_REL_PPC_BRTAKEN, IMAGE_REL_PPC_BRNTAKEN - indicates that the branch is expected to be taken or not. 3. IMAGE_REL_PPC_TOCDEFN - toc slot definition in the file For now, we just strip this stuff to find the type, and ignore it other than that. */ unsigned short r_type = EXTRACT_TYPE (internal->r_type); unsigned short r_flags = EXTRACT_FLAGS(internal->r_type); unsigned short junk = EXTRACT_JUNK (internal->r_type); /* the masking process only slices off the bottom byte for r_type. */ if ( r_type > MAX_RELOC_INDEX ) { fprintf(stderr, "ppc_coff_rtype2howto: reloc index %d out of range [%d, %d]\n", internal->r_type, 0, MAX_RELOC_INDEX); abort(); } /* check for absolute crap */ if ( junk != 0 ) { fprintf(stderr, "ppc_coff_rtype2howto: reloc index %d contains junk %d\n", internal->r_type, junk); abort(); } #ifdef DEBUG_RELOC /* now examine flags */ if (r_flags != 0) { fprintf (stderr, "Reloc with flags found!"); if ( r_flags & IMAGE_REL_PPC_NEG ) fprintf (stderr, " NEG"); if ( r_flags & IMAGE_REL_PPC_BRTAKEN ) fprintf (stderr, " BRTAKEN"); if ( r_flags & IMAGE_REL_PPC_BRNTAKEN ) fprintf (stderr, " BRNTAKEN"); if ( r_flags & IMAGE_REL_PPC_TOCDEFN ) fprintf (stderr, " TOCDEFN"); fprintf(stderr, "\n"); } #endif switch(r_type) { case IMAGE_REL_PPC_ADDR16: case IMAGE_REL_PPC_REL24: case IMAGE_REL_PPC_ADDR24: case IMAGE_REL_PPC_TOCREL16: case IMAGE_REL_PPC_ADDR32: case IMAGE_REL_PPC_IFGLUE: case IMAGE_REL_PPC_ADDR32NB: case IMAGE_REL_PPC_SECTION: case IMAGE_REL_PPC_SECREL: DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal); break; case IMAGE_REL_PPC_IMGLUE: DUMP_RELOC2(ppc_coff_howto_table[r_type].name, internal); /* IMGLUE relocs have big numbers in them. Don't know what for yet. */ internal->r_vaddr = 0; /* make it zero for now */ break; default: fprintf(stderr, "Warning: Unsupported reloc %s [%d] used -- it may not work.\n", ppc_coff_howto_table[r_type].name, r_type); break; } relent->howto = ppc_coff_howto_table + r_type; } static reloc_howto_type * coff_ppc_rtype_to_howto (abfd, sec, rel, h, sym, addendp) bfd *abfd; asection *sec; struct internal_reloc *rel; struct coff_link_hash_entry *h; struct internal_syment *sym; bfd_vma *addendp; { reloc_howto_type *howto; /* We can encode one of three things in the type field, aside from the type: 1. IMAGE_REL_PPC_NEG - indicates the value field is a subtraction value, rather than an addition value 2. IMAGE_REL_PPC_BRTAKEN, IMAGE_REL_PPC_BRNTAKEN - indicates that the branch is expected to be taken or not. 3. IMAGE_REL_PPC_TOCDEFN - toc slot definition in the file For now, we just strip this stuff to find the type, and ignore it other than that. */ unsigned short r_type = EXTRACT_TYPE (rel->r_type); unsigned short r_flags = EXTRACT_FLAGS(rel->r_type); unsigned short junk = EXTRACT_JUNK (rel->r_type); /* the masking process only slices off the bottom byte for r_type. */ if ( r_type > MAX_RELOC_INDEX ) { fprintf(stderr, "coff_ppc_rtype_to_howto: index %d out of range [%d, %d]\n", r_type, 0, MAX_RELOC_INDEX); abort(); } /* check for absolute crap */ if ( junk != 0 ) { fprintf(stderr, "coff_ppc_rtype_to_howto: reloc index %d contains junk %d\n", rel->r_type, junk); abort(); } #ifdef DEBUG_RELOC /* now examine flags */ if (r_flags != 0) { fprintf (stderr, "Reloc with flags found!"); if ( r_flags & IMAGE_REL_PPC_NEG ) fprintf (stderr, " NEG"); if ( r_flags & IMAGE_REL_PPC_BRTAKEN ) fprintf (stderr, " BRTAKEN"); if ( r_flags & IMAGE_REL_PPC_BRNTAKEN ) fprintf (stderr, " BRNTAKEN"); if ( r_flags & IMAGE_REL_PPC_TOCDEFN ) fprintf (stderr, " TOCDEFN"); fprintf(stderr, "\n"); } #endif switch(r_type) { case IMAGE_REL_PPC_ADDR32NB: DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel); *addendp -= pe_data(sec->output_section->owner)->pe_opthdr.ImageBase; break; case IMAGE_REL_PPC_ADDR16: case IMAGE_REL_PPC_REL24: case IMAGE_REL_PPC_ADDR24: case IMAGE_REL_PPC_TOCREL16: case IMAGE_REL_PPC_ADDR32: case IMAGE_REL_PPC_IFGLUE: case IMAGE_REL_PPC_SECTION: case IMAGE_REL_PPC_SECREL: DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel); break; case IMAGE_REL_PPC_IMGLUE: DUMP_RELOC2(ppc_coff_howto_table[r_type].name, rel); /* IMGLUE relocs have big numbers in them. Don't know what for yet. */ rel->r_vaddr = 0; /* make it zero for now */ break; default: fprintf(stderr, "Warning: Unsupported reloc %s [%d] used -- it may not work.\n", ppc_coff_howto_table[r_type].name, r_type); break; } howto = ppc_coff_howto_table + r_type; return howto; } /* a cheesy little macro to make the code a little more readable */ #define HOW2MAP(bfd_rtype,ppc_rtype) \ case bfd_rtype: return &ppc_coff_howto_table[ppc_rtype] static reloc_howto_type *ppc_coff_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type)); static reloc_howto_type * ppc_coff_reloc_type_lookup (abfd, code) bfd *abfd; bfd_reloc_code_real_type code; { #ifdef DEBUG_RELOC fprintf(stderr, "ppc_coff_reloc_type_lookup for %s\n", bfd_get_reloc_code_name(code)); #endif switch (code) { HOW2MAP(BFD_RELOC_16_GOT_PCREL, IMAGE_REL_PPC_IFGLUE); HOW2MAP(BFD_RELOC_16, IMAGE_REL_PPC_ADDR16); HOW2MAP(BFD_RELOC_PPC_B26, IMAGE_REL_PPC_REL24); HOW2MAP(BFD_RELOC_PPC_BA26, IMAGE_REL_PPC_ADDR24); HOW2MAP(BFD_RELOC_PPC_TOC16, IMAGE_REL_PPC_TOCREL16); HOW2MAP(BFD_RELOC_32, IMAGE_REL_PPC_ADDR32); default: return NULL; } return NULL; } #undef HOW2MAP /* Tailor coffcode.h -- macro heaven. */ #define RTYPE2HOWTO(cache_ptr, dst) ppc_coff_rtype2howto (cache_ptr, dst) /* We use the special COFF backend linker. */ /* #define coff_relocate_section _bfd_coff_generic_relocate_section */ #define coff_bfd_reloc_type_lookup ppc_coff_reloc_type_lookup #define coff_rtype_to_howto coff_ppc_rtype_to_howto #define coff_relocate_section coff_ppc_relocate_section #define SELECT_RELOC(internal, howto) {internal.r_type=howto->type;} #define COFF_PAGE_SIZE 0x1000 #include "coffcode.h" /* The transfer vectors that lead the outside world to all of the above. */ #ifdef TARGET_LITTLE_SYM const bfd_target TARGET_LITTLE_SYM = { TARGET_LITTLE_NAME, /* name or coff-arm-little */ bfd_target_coff_flavour, false, /* data byte order is little */ false, /* header byte order is little */ (HAS_RELOC | EXEC_P | /* FIXME: object flags */ HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS | WP_TEXT), (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ 0, /* leading char */ '/', /* ar_pad_char */ 15, /* ar_max_namelen??? FIXMEmgo */ bfd_getl64, bfd_getl_signed_64, bfd_putl64, bfd_getl32, bfd_getl_signed_32, bfd_putl32, bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ bfd_getl64, bfd_getl_signed_64, bfd_putl64, bfd_getl32, bfd_getl_signed_32, bfd_putl32, bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ bfd_generic_archive_p, /* _bfd_dummy_target */ coff_object_p }, {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ bfd_false}, {bfd_false, coff_write_object_contents, /* bfd_write_contents */ _bfd_write_archive_contents, bfd_false}, BFD_JUMP_TABLE_GENERIC (coff), BFD_JUMP_TABLE_COPY (coff), BFD_JUMP_TABLE_CORE (_bfd_nocore), BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), BFD_JUMP_TABLE_SYMBOLS (coff), BFD_JUMP_TABLE_RELOCS (coff), BFD_JUMP_TABLE_WRITE (coff), BFD_JUMP_TABLE_LINK (coff), BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), COFF_SWAP_TABLE, }; #endif #ifdef TARGET_BIG_SYM const bfd_target TARGET_BIG_SYM = { TARGET_BIG_NAME, bfd_target_coff_flavour, true, /* data byte order is big */ true, /* header byte order is big */ (HAS_RELOC | EXEC_P | /* FIXME: object flags */ HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS | WP_TEXT), (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ 0, /* leading char */ '/', /* ar_pad_char */ 15, /* ar_max_namelen??? FIXMEmgo */ bfd_getb64, bfd_getb_signed_64, bfd_putb64, bfd_getb32, bfd_getb_signed_32, bfd_putb32, bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */ bfd_getb64, bfd_getb_signed_64, bfd_putb64, bfd_getb32, bfd_getb_signed_32, bfd_putb32, bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */ {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ bfd_generic_archive_p, /* _bfd_dummy_target */ coff_object_p }, {bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */ bfd_false}, {bfd_false, coff_write_object_contents, /* bfd_write_contents */ _bfd_write_archive_contents, bfd_false}, BFD_JUMP_TABLE_GENERIC (coff), BFD_JUMP_TABLE_COPY (coff), BFD_JUMP_TABLE_CORE (_bfd_nocore), BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), BFD_JUMP_TABLE_SYMBOLS (coff), BFD_JUMP_TABLE_RELOCS (coff), BFD_JUMP_TABLE_WRITE (coff), BFD_JUMP_TABLE_LINK (coff), BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), COFF_SWAP_TABLE, }; #endif