/* Support for 32-bit PowerPC NLM (NetWare Loadable Module) Copyright (C) 1994 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 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. */ #include "bfd.h" #include "sysdep.h" #include "libbfd.h" #define ARCH_SIZE 32 #include "nlm/ppc-ext.h" #define Nlm_External_Fixed_Header Nlm32_powerpc_External_Fixed_Header #include "libnlm.h" static boolean nlm_powerpc_backend_object_p PARAMS ((bfd *)); static boolean nlm_powerpc_write_prefix PARAMS ((bfd *)); static boolean nlm_powerpc_read_reloc PARAMS ((bfd *, nlmNAME(symbol_type) *, asection **, arelent *)); static boolean nlm_powerpc_mangle_relocs PARAMS ((bfd *, asection *, PTR, bfd_vma, bfd_size_type)); static boolean nlm_powerpc_read_import PARAMS ((bfd *, nlmNAME(symbol_type) *)); static boolean nlm_powerpc_write_reloc PARAMS ((bfd *, asection *, arelent *, int)); static boolean nlm_powerpc_write_import PARAMS ((bfd *, asection *, arelent *)); static boolean nlm_powerpc_write_external PARAMS ((bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *)); /* PowerPC NLM's have a prefix header before the standard NLM. This function reads it in, verifies the version, and seeks the bfd to the location before the regular NLM header. */ static boolean nlm_powerpc_backend_object_p (abfd) bfd *abfd; { struct nlm32_powerpc_external_prefix_header s; if (bfd_read ((PTR) &s, sizeof s, 1, abfd) != sizeof s) return false; if (memcmp (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature) != 0 || bfd_h_get_32 (abfd, s.headerVersion) != NLM32_POWERPC_HEADER_VERSION) return false; return true; } /* Write out the prefix. */ static boolean nlm_powerpc_write_prefix (abfd) bfd *abfd; { struct nlm32_powerpc_external_prefix_header s; memset (&s, 0, sizeof s); memcpy (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature); bfd_h_put_32 (abfd, (bfd_vma) NLM32_POWERPC_HEADER_VERSION, s.headerVersion); bfd_h_put_32 (abfd, (bfd_vma) 0, s.origins); /* FIXME: What should we do about the date? */ if (bfd_write ((PTR) &s, sizeof s, 1, abfd) != sizeof s) return false; return true; } /* How to process the various reloc types. PowerPC NLMs use XCOFF reloc types, and I have just copied the XCOFF reloc table here. */ static reloc_howto_type nlm_powerpc_howto_table[] = { /* Standard 32 bit relocation. */ HOWTO (0, /* 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 */ "R_POS", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* 32 bit relocation, but store negative value. */ HOWTO (1, /* 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 */ "R_NEG", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* 32 bit PC relative relocation. */ HOWTO (2, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 32, /* bitsize */ true, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ 0, /* special_function */ "R_REL", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* 16 bit TOC relative relocation. */ HOWTO (3, /* 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 */ "R_TOC", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* I don't really know what this is. */ HOWTO (4, /* type */ 1, /* 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 */ "R_RTB", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* External TOC relative symbol. */ HOWTO (5, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "R_GL", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Local TOC relative symbol. */ HOWTO (6, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "R_TCL", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ { 7 }, /* Non modifiable absolute branch. */ HOWTO (8, /* 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 */ "R_BA", /* name */ true, /* partial_inplace */ 0x3fffffc, /* src_mask */ 0x3fffffc, /* dst_mask */ false), /* pcrel_offset */ { 9 }, /* Non modifiable relative branch. */ HOWTO (0xa, /* 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 */ "R_BR", /* name */ true, /* partial_inplace */ 0x3fffffc, /* src_mask */ 0x3fffffc, /* dst_mask */ false), /* pcrel_offset */ { 0xb }, /* Indirect load. */ HOWTO (0xc, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "R_RL", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Load address. */ HOWTO (0xd, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "R_RLA", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ { 0xe }, /* Non-relocating reference. */ HOWTO (0xf, /* 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 */ "R_REF", /* name */ false, /* partial_inplace */ 0, /* src_mask */ 0, /* dst_mask */ false), /* pcrel_offset */ { 0x10 }, { 0x11 }, /* TOC relative indirect load. */ HOWTO (0x12, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "R_TRL", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* TOC relative load address. */ HOWTO (0x13, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "R_TRLA", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Modifiable relative branch. */ HOWTO (0x14, /* type */ 1, /* 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 */ "R_RRTBI", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* Modifiable absolute branch. */ HOWTO (0x15, /* type */ 1, /* 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 */ "R_RRTBA", /* name */ true, /* partial_inplace */ 0xffffffff, /* src_mask */ 0xffffffff, /* dst_mask */ false), /* pcrel_offset */ /* Modifiable call absolute indirect. */ HOWTO (0x16, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "R_CAI", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Modifiable call relative. */ HOWTO (0x17, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "R_REL", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Modifiable branch absolute. */ HOWTO (0x18, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "R_RBA", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Modifiable branch absolute. */ HOWTO (0x19, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "R_RBAC", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Modifiable branch relative. */ HOWTO (0x1a, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 26, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_signed, /* complain_on_overflow */ 0, /* special_function */ "R_REL", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false), /* pcrel_offset */ /* Modifiable branch absolute. */ HOWTO (0x1b, /* type */ 0, /* rightshift */ 2, /* size (0 = byte, 1 = short, 2 = long) */ 16, /* bitsize */ false, /* pc_relative */ 0, /* bitpos */ complain_overflow_bitfield, /* complain_on_overflow */ 0, /* special_function */ "R_REL", /* name */ true, /* partial_inplace */ 0xffff, /* src_mask */ 0xffff, /* dst_mask */ false) /* pcrel_offset */ }; #define HOWTO_COUNT (sizeof nlm_powerpc_howto_table \ / sizeof nlm_powerpc_howto_table[0]) /* Read a PowerPC NLM reloc. */ static boolean nlm_powerpc_read_reloc (abfd, sym, secp, rel) bfd *abfd; nlmNAME(symbol_type) *sym; asection **secp; arelent *rel; { struct nlm32_powerpc_external_reloc ext; bfd_vma l_vaddr; unsigned long l_symndx; int l_rtype; int l_rsecnm; asection *code_sec, *data_sec, *bss_sec; /* Read the reloc from the file. */ if (bfd_read (&ext, sizeof ext, 1, abfd) != sizeof ext) return false; /* Swap in the fields. */ l_vaddr = bfd_h_get_32 (abfd, ext.l_vaddr); l_symndx = bfd_h_get_32 (abfd, ext.l_symndx); l_rtype = bfd_h_get_16 (abfd, ext.l_rtype); l_rsecnm = bfd_h_get_16 (abfd, ext.l_rsecnm); /* Get the sections now, for convenience. */ code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME); /* Work out the arelent fields. */ if (sym != NULL) { /* This is an import. sym_ptr_ptr is filled in by nlm_canonicalize_reloc. */ rel->sym_ptr_ptr = NULL; } else { asection *sec; if (l_symndx == 0) sec = code_sec; else if (l_symndx == 1) sec = data_sec; else if (l_symndx == 2) sec = bss_sec; else { bfd_set_error (bfd_error_bad_value); return false; } rel->sym_ptr_ptr = sec->symbol_ptr_ptr; } rel->addend = 0; BFD_ASSERT ((l_rtype & 0xff) < HOWTO_COUNT); rel->howto = nlm_powerpc_howto_table + (l_rtype & 0xff); BFD_ASSERT (rel->howto->name != NULL && ((l_rtype & 0x8000) != 0 ? (rel->howto->complain_on_overflow == complain_overflow_signed) : (rel->howto->complain_on_overflow == complain_overflow_bitfield)) && ((l_rtype >> 8) & 0x1f) == rel->howto->bitsize - 1); if (l_rsecnm == 0) *secp = code_sec; else if (l_rsecnm == 1) { *secp = data_sec; l_vaddr -= bfd_section_size (abfd, code_sec); } else { bfd_set_error (bfd_error_bad_value); return false; } rel->address = l_vaddr; return true; } /* Mangle PowerPC NLM relocs for output. */ static boolean nlm_powerpc_mangle_relocs (abfd, sec, data, offset, count) bfd *abfd; asection *sec; PTR data; bfd_vma offset; bfd_size_type count; { return true; } /* Read a PowerPC NLM import record */ static boolean nlm_powerpc_read_import (abfd, sym) bfd *abfd; nlmNAME(symbol_type) *sym; { struct nlm_relent *nlm_relocs; /* relocation records for symbol */ bfd_size_type rcount; /* number of relocs */ bfd_byte temp[NLM_TARGET_LONG_SIZE]; /* temporary 32-bit value */ unsigned char symlength; /* length of symbol name */ char *name; if (bfd_read ((PTR) &symlength, sizeof (symlength), 1, abfd) != sizeof (symlength)) return (false); sym -> symbol.the_bfd = abfd; name = bfd_alloc (abfd, symlength + 1); if (name == NULL) { bfd_set_error (bfd_error_no_memory); return false; } if (bfd_read (name, symlength, 1, abfd) != symlength) return (false); name[symlength] = '\0'; sym -> symbol.name = name; sym -> symbol.flags = 0; sym -> symbol.value = 0; sym -> symbol.section = &bfd_und_section; if (bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp)) return (false); rcount = bfd_h_get_32 (abfd, temp); nlm_relocs = ((struct nlm_relent *) bfd_alloc (abfd, rcount * sizeof (struct nlm_relent))); if (nlm_relocs == (struct nlm_relent *) NULL) { bfd_set_error (bfd_error_no_memory); return false; } sym -> relocs = nlm_relocs; sym -> rcnt = 0; while (sym -> rcnt < rcount) { asection *section; if (nlm_powerpc_read_reloc (abfd, sym, §ion, &nlm_relocs -> reloc) == false) return false; nlm_relocs -> section = section; nlm_relocs++; sym -> rcnt++; } return true; } /* Write a PowerPC NLM reloc. */ static boolean nlm_powerpc_write_reloc (abfd, sec, rel, indx) bfd *abfd; asection *sec; arelent *rel; int indx; { struct nlm32_powerpc_external_reloc ext; asection *code_sec, *data_sec, *bss_sec; asymbol *sym; asection *symsec; unsigned long l_symndx; int l_rtype; int l_rsecnm; const reloc_howto_type *howto; bfd_size_type address; /* Get the sections now, for convenience. */ code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); bss_sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME); sym = *rel->sym_ptr_ptr; symsec = bfd_get_section (sym); if (indx != -1) { BFD_ASSERT (symsec == &bfd_und_section); l_symndx = indx + 3; } else { if (symsec == code_sec) l_symndx = 0; else if (symsec == data_sec) l_symndx = 1; else if (symsec == bss_sec) l_symndx = 2; else { bfd_set_error (bfd_error_bad_value); return false; } } bfd_h_put_32 (abfd, (bfd_vma) l_symndx, ext.l_symndx); for (howto = nlm_powerpc_howto_table; howto < nlm_powerpc_howto_table + HOWTO_COUNT; howto++) { if (howto->rightshift == rel->howto->rightshift && howto->size == rel->howto->size && howto->bitsize == rel->howto->bitsize && howto->pc_relative == rel->howto->pc_relative && howto->bitpos == rel->howto->bitpos && (howto->partial_inplace == rel->howto->partial_inplace || (! rel->howto->partial_inplace && rel->addend == 0)) && (howto->src_mask == rel->howto->src_mask || (rel->howto->src_mask == 0 && rel->addend == 0)) && howto->dst_mask == rel->howto->dst_mask && howto->pcrel_offset == rel->howto->pcrel_offset) break; } if (howto >= nlm_powerpc_howto_table + HOWTO_COUNT) { bfd_set_error (bfd_error_bad_value); return false; } l_rtype = howto->type; if (howto->complain_on_overflow == complain_overflow_signed) l_rtype |= 0x8000; l_rtype |= (howto->bitsize - 1) << 8; bfd_h_put_16 (abfd, (bfd_vma) l_rtype, ext.l_rtype); address = rel->address; if (sec == code_sec) l_rsecnm = 0; else if (sec == data_sec) { l_rsecnm = 1; address += bfd_section_size (abfd, code_sec); } else { bfd_set_error (bfd_error_bad_value); return false; } bfd_h_put_16 (abfd, (bfd_vma) l_rsecnm, ext.l_rsecnm); bfd_h_put_32 (abfd, (bfd_vma) address, ext.l_vaddr); if (bfd_write (&ext, sizeof ext, 1, abfd) != sizeof ext) return false; return true; } /* Write a PowerPC NLM import. */ static boolean nlm_powerpc_write_import (abfd, sec, rel) bfd *abfd; asection *sec; arelent *rel; { return nlm_powerpc_write_reloc (abfd, sec, rel, -1); } /* Write a PowerPC NLM external symbol. This routine keeps a static count of the symbol index. FIXME: I don't know if this is necessary, and the index never gets reset. */ static boolean nlm_powerpc_write_external (abfd, count, sym, relocs) bfd *abfd; bfd_size_type count; asymbol *sym; struct reloc_and_sec *relocs; { int i; bfd_byte len; unsigned char temp[NLM_TARGET_LONG_SIZE]; static int indx; len = strlen (sym->name); if ((bfd_write (&len, sizeof (bfd_byte), 1, abfd) != sizeof(bfd_byte)) || bfd_write (sym->name, len, 1, abfd) != len) return false; bfd_put_32 (abfd, count, temp); if (bfd_write (temp, sizeof(temp), 1, abfd) != sizeof (temp)) return false; for (i = 0; i < count; i++) { if (nlm_powerpc_write_reloc (abfd, relocs[i].sec, relocs[i].rel, indx) == false) return false; } ++indx; return true; } #include "nlmswap.h" static const struct nlm_backend_data nlm32_powerpc_backend = { "NetWare PowerPC Module \032", sizeof (Nlm32_powerpc_External_Fixed_Header), sizeof (struct nlm32_powerpc_external_prefix_header), bfd_arch_powerpc, 0, false, nlm_powerpc_backend_object_p, nlm_powerpc_write_prefix, nlm_powerpc_read_reloc, nlm_powerpc_mangle_relocs, nlm_powerpc_read_import, nlm_powerpc_write_import, 0, /* set_public_section */ 0, /* get_public_offset */ nlm_swap_fixed_header_in, nlm_swap_fixed_header_out, nlm_powerpc_write_external, 0, /* write_export */ }; #define TARGET_BIG_NAME "nlm32-powerpc" #define TARGET_BIG_SYM nlmNAME(powerpc_vec) #define TARGET_BACKEND_DATA &nlm32_powerpc_backend #include "nlm-target.h"