| /* Support for 32-bit Alpha NLM (NetWare Loadable Module) |
| Copyright 1993, 1994, 2000, 2001, 2002, 2003 |
| Free Software Foundation, Inc. |
| Written by Ian Lance Taylor, Cygnus Support. |
| |
| 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| /* This file describes the 32 bit Alpha NLM format. You might think |
| that an Alpha chip would use a 64 bit format, but, for some reason, |
| it doesn't. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include "libbfd.h" |
| |
| #define ARCH_SIZE 32 |
| |
| #include "nlm/alpha-ext.h" |
| #define Nlm_External_Fixed_Header Nlm32_alpha_External_Fixed_Header |
| |
| #include "libnlm.h" |
| |
| static bfd_boolean nlm_alpha_backend_object_p |
| PARAMS ((bfd *)); |
| static bfd_boolean nlm_alpha_write_prefix |
| PARAMS ((bfd *)); |
| static bfd_boolean nlm_alpha_read_reloc |
| PARAMS ((bfd *, nlmNAME(symbol_type) *, asection **, arelent *)); |
| static bfd_boolean nlm_alpha_mangle_relocs |
| PARAMS ((bfd *, asection *, const PTR, bfd_vma, bfd_size_type)); |
| static bfd_boolean nlm_alpha_read_import |
| PARAMS ((bfd *, nlmNAME(symbol_type) *)); |
| static bfd_boolean nlm_alpha_write_import |
| PARAMS ((bfd *, asection *, arelent *)); |
| static bfd_boolean nlm_alpha_set_public_section |
| PARAMS ((bfd *, nlmNAME(symbol_type) *)); |
| static bfd_vma nlm_alpha_get_public_offset |
| PARAMS ((bfd *, asymbol *)); |
| static bfd_boolean nlm_alpha_write_external |
| PARAMS ((bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *)); |
| |
| /* Alpha 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 bfd_boolean |
| nlm_alpha_backend_object_p (abfd) |
| bfd *abfd; |
| { |
| struct nlm32_alpha_external_prefix_header s; |
| file_ptr size; |
| |
| if (bfd_bread ((PTR) &s, (bfd_size_type) sizeof s, abfd) != sizeof s) |
| return FALSE; |
| |
| if (H_GET_32 (abfd, s.magic) != NLM32_ALPHA_MAGIC) |
| return FALSE; |
| |
| /* FIXME: Should we check the format number? */ |
| |
| /* Skip to the end of the header. */ |
| size = H_GET_32 (abfd, s.size); |
| if (bfd_seek (abfd, size, SEEK_SET) != 0) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| /* Write out the prefix. */ |
| |
| static bfd_boolean |
| nlm_alpha_write_prefix (abfd) |
| bfd *abfd; |
| { |
| struct nlm32_alpha_external_prefix_header s; |
| |
| memset (&s, 0, sizeof s); |
| H_PUT_32 (abfd, NLM32_ALPHA_MAGIC, s.magic); |
| H_PUT_32 (abfd, 2, s.format); |
| H_PUT_32 (abfd, sizeof s, s.size); |
| if (bfd_bwrite ((PTR) &s, (bfd_size_type) sizeof s, abfd) != sizeof s) |
| return FALSE; |
| return TRUE; |
| } |
| |
| #define ONES(n) (((bfd_vma) 1 << ((n) - 1) << 1) - 1) |
| |
| /* How to process the various reloc types. */ |
| |
| static reloc_howto_type nlm32_alpha_howto_table[] = |
| { |
| /* Reloc type 0 is ignored by itself. However, it appears after a |
| GPDISP reloc to identify the location where the low order 16 bits |
| of the gp register are loaded. */ |
| HOWTO (ALPHA_R_IGNORE, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 8, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "IGNORE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A 32 bit reference to a symbol. */ |
| HOWTO (ALPHA_R_REFLONG, /* 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 */ |
| "REFLONG", /* name */ |
| TRUE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A 64 bit reference to a symbol. */ |
| HOWTO (ALPHA_R_REFQUAD, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_bitfield, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "REFQUAD", /* name */ |
| TRUE, /* partial_inplace */ |
| ONES (64), /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A 32 bit GP relative offset. This is just like REFLONG except |
| that when the value is used the value of the gp register will be |
| added in. */ |
| HOWTO (ALPHA_R_GPREL32, /* 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 */ |
| "GPREL32", /* name */ |
| TRUE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Used for an instruction that refers to memory off the GP |
| register. The offset is 16 bits of the 32 bit instruction. This |
| reloc always seems to be against the .lita section. */ |
| HOWTO (ALPHA_R_LITERAL, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "LITERAL", /* name */ |
| TRUE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* This reloc only appears immediately following a LITERAL reloc. |
| It identifies a use of the literal. It seems that the linker can |
| use this to eliminate a portion of the .lita section. The symbol |
| index is special: 1 means the literal address is in the base |
| register of a memory format instruction; 2 means the literal |
| address is in the byte offset register of a byte-manipulation |
| instruction; 3 means the literal address is in the target |
| register of a jsr instruction. This does not actually do any |
| relocation. */ |
| HOWTO (ALPHA_R_LITUSE, /* type */ |
| 0, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 32, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "LITUSE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Load the gp register. This is always used for a ldah instruction |
| which loads the upper 16 bits of the gp register. The next reloc |
| will be an IGNORE reloc which identifies the location of the lda |
| instruction which loads the lower 16 bits. The symbol index of |
| the GPDISP instruction appears to actually be the number of bytes |
| between the ldah and lda instructions. This gives two different |
| ways to determine where the lda instruction is; I don't know why |
| both are used. The value to use for the relocation is the |
| difference between the GP value and the current location; the |
| load will always be done against a register holding the current |
| address. */ |
| HOWTO (ALPHA_R_GPDISP, /* type */ |
| 16, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "GPDISP", /* name */ |
| TRUE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| TRUE), /* pcrel_offset */ |
| |
| /* A 21 bit branch. The native assembler generates these for |
| branches within the text segment, and also fills in the PC |
| relative offset in the instruction. It seems to me that this |
| reloc, unlike the others, is not partial_inplace. */ |
| HOWTO (ALPHA_R_BRADDR, /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 21, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "BRADDR", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0x1fffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A hint for a jump to a register. */ |
| HOWTO (ALPHA_R_HINT, /* type */ |
| 2, /* rightshift */ |
| 2, /* size (0 = byte, 1 = short, 2 = long) */ |
| 14, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "HINT", /* name */ |
| TRUE, /* partial_inplace */ |
| 0x3fff, /* src_mask */ |
| 0x3fff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 16 bit PC relative offset. */ |
| HOWTO (ALPHA_R_SREL16, /* type */ |
| 0, /* rightshift */ |
| 1, /* size (0 = byte, 1 = short, 2 = long) */ |
| 16, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "SREL16", /* name */ |
| TRUE, /* partial_inplace */ |
| 0xffff, /* src_mask */ |
| 0xffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* 32 bit PC relative offset. */ |
| HOWTO (ALPHA_R_SREL32, /* 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 */ |
| "SREL32", /* name */ |
| TRUE, /* partial_inplace */ |
| 0xffffffff, /* src_mask */ |
| 0xffffffff, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* A 64 bit PC relative offset. */ |
| HOWTO (ALPHA_R_SREL64, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| TRUE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_signed, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "SREL64", /* name */ |
| TRUE, /* partial_inplace */ |
| ONES (64), /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Push a value on the reloc evaluation stack. */ |
| HOWTO (ALPHA_R_OP_PUSH, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "OP_PUSH", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Store the value from the stack at the given address. Store it in |
| a bitfield of size r_size starting at bit position r_offset. */ |
| HOWTO (ALPHA_R_OP_STORE, /* type */ |
| 0, /* rightshift */ |
| 4, /* size (0 = byte, 1 = short, 2 = long) */ |
| 64, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "OP_STORE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| ONES (64), /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Subtract the reloc address from the value on the top of the |
| relocation stack. */ |
| HOWTO (ALPHA_R_OP_PSUB, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "OP_PSUB", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Shift the value on the top of the relocation stack right by the |
| given value. */ |
| HOWTO (ALPHA_R_OP_PRSHIFT, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "OP_PRSHIFT", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE), /* pcrel_offset */ |
| |
| /* Adjust the GP value for a new range in the object file. */ |
| HOWTO (ALPHA_R_GPVALUE, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "GPVALUE", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE) /* pcrel_offset */ |
| }; |
| |
| static reloc_howto_type nlm32_alpha_nw_howto = |
| HOWTO (ALPHA_R_NW_RELOC, /* type */ |
| 0, /* rightshift */ |
| 0, /* size (0 = byte, 1 = short, 2 = long) */ |
| 0, /* bitsize */ |
| FALSE, /* pc_relative */ |
| 0, /* bitpos */ |
| complain_overflow_dont, /* complain_on_overflow */ |
| 0, /* special_function */ |
| "NW_RELOC", /* name */ |
| FALSE, /* partial_inplace */ |
| 0, /* src_mask */ |
| 0, /* dst_mask */ |
| FALSE); /* pcrel_offset */ |
| |
| /* Read an Alpha NLM reloc. This routine keeps some static data which |
| it uses when handling local relocs. This only works correctly |
| because all the local relocs are read at once. */ |
| |
| static bfd_boolean |
| nlm_alpha_read_reloc (abfd, sym, secp, rel) |
| bfd *abfd; |
| nlmNAME(symbol_type) *sym; |
| asection **secp; |
| arelent *rel; |
| { |
| static bfd_vma gp_value; |
| static bfd_vma lita_address; |
| struct nlm32_alpha_external_reloc ext; |
| bfd_vma r_vaddr; |
| long r_symndx; |
| int r_type, r_extern, r_offset, r_size; |
| asection *code_sec, *data_sec; |
| |
| /* Read the reloc from the file. */ |
| if (bfd_bread (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext) |
| return FALSE; |
| |
| /* Swap in the reloc information. */ |
| r_vaddr = H_GET_64 (abfd, ext.r_vaddr); |
| r_symndx = H_GET_32 (abfd, ext.r_symndx); |
| |
| BFD_ASSERT (bfd_little_endian (abfd)); |
| |
| r_type = ((ext.r_bits[0] & RELOC_BITS0_TYPE_LITTLE) |
| >> RELOC_BITS0_TYPE_SH_LITTLE); |
| r_extern = (ext.r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0; |
| r_offset = ((ext.r_bits[1] & RELOC_BITS1_OFFSET_LITTLE) |
| >> RELOC_BITS1_OFFSET_SH_LITTLE); |
| /* Ignore the reserved bits. */ |
| r_size = ((ext.r_bits[3] & RELOC_BITS3_SIZE_LITTLE) |
| >> RELOC_BITS3_SIZE_SH_LITTLE); |
| |
| /* Fill in the BFD arelent structure. */ |
| code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); |
| data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); |
| if (r_extern) |
| { |
| /* External relocations are only used for imports. */ |
| BFD_ASSERT (sym != NULL); |
| /* We don't need to set sym_ptr_ptr for this case. It is set in |
| nlm_canonicalize_reloc. */ |
| rel->sym_ptr_ptr = NULL; |
| rel->addend = 0; |
| } |
| else |
| { |
| /* Internal relocations are only used for local relocation |
| fixups. If they are not NW_RELOC or GPDISP or IGNORE, they |
| must be against .text or .data. */ |
| BFD_ASSERT (r_type == ALPHA_R_NW_RELOC || sym == NULL); |
| if (r_type == ALPHA_R_NW_RELOC |
| || r_type == ALPHA_R_GPDISP |
| || r_type == ALPHA_R_IGNORE) |
| { |
| rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| rel->addend = 0; |
| } |
| else if (r_symndx == ALPHA_RELOC_SECTION_TEXT) |
| { |
| rel->sym_ptr_ptr = code_sec->symbol_ptr_ptr; |
| BFD_ASSERT (bfd_get_section_vma (abfd, code_sec) == 0); |
| rel->addend = 0; |
| } |
| else if (r_symndx == ALPHA_RELOC_SECTION_DATA) |
| { |
| rel->sym_ptr_ptr = data_sec->symbol_ptr_ptr; |
| rel->addend = - bfd_get_section_vma (abfd, data_sec); |
| } |
| else |
| { |
| BFD_ASSERT (0); |
| rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| rel->addend = 0; |
| } |
| } |
| |
| /* We use the address to determine whether the reloc is in the .text |
| or .data section. R_NW_RELOC relocs don't really have a section, |
| so we put them in .text. */ |
| if (r_type == ALPHA_R_NW_RELOC |
| || r_vaddr < bfd_section_size (abfd, code_sec)) |
| { |
| *secp = code_sec; |
| rel->address = r_vaddr; |
| } |
| else |
| { |
| *secp = data_sec; |
| rel->address = r_vaddr - bfd_section_size (abfd, code_sec); |
| } |
| |
| /* We must adjust the addend based on the type. */ |
| BFD_ASSERT ((r_type >= 0 && r_type <= ALPHA_R_GPVALUE) |
| || r_type == ALPHA_R_NW_RELOC); |
| |
| switch (r_type) |
| { |
| case ALPHA_R_BRADDR: |
| case ALPHA_R_SREL16: |
| case ALPHA_R_SREL32: |
| case ALPHA_R_SREL64: |
| /* The PC relative relocs do not seem to use the section VMA as |
| a negative addend. */ |
| rel->addend = 0; |
| break; |
| |
| case ALPHA_R_GPREL32: |
| /* Copy the gp value for this object file into the addend, to |
| ensure that we are not confused by the linker. */ |
| if (! r_extern) |
| rel->addend += gp_value; |
| break; |
| |
| case ALPHA_R_LITERAL: |
| BFD_ASSERT (! r_extern); |
| rel->addend += lita_address; |
| break; |
| |
| case ALPHA_R_LITUSE: |
| case ALPHA_R_GPDISP: |
| /* The LITUSE and GPDISP relocs do not use a symbol, or an |
| addend, but they do use a special code. Put this code in the |
| addend field. */ |
| rel->addend = r_symndx; |
| rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| break; |
| |
| case ALPHA_R_OP_STORE: |
| /* The STORE reloc needs the size and offset fields. We store |
| them in the addend. */ |
| BFD_ASSERT (r_offset < 256 && r_size < 256); |
| rel->addend = (r_offset << 8) + r_size; |
| break; |
| |
| case ALPHA_R_OP_PUSH: |
| case ALPHA_R_OP_PSUB: |
| case ALPHA_R_OP_PRSHIFT: |
| /* The PUSH, PSUB and PRSHIFT relocs do not actually use an |
| address. I believe that the address supplied is really an |
| addend. */ |
| rel->addend = r_vaddr; |
| break; |
| |
| case ALPHA_R_GPVALUE: |
| /* Record the new gp value. */ |
| gp_value += r_symndx; |
| rel->addend = gp_value; |
| break; |
| |
| case ALPHA_R_IGNORE: |
| /* If the type is ALPHA_R_IGNORE, make sure this is a reference |
| to the absolute section so that the reloc is ignored. For |
| some reason the address of this reloc type is not adjusted by |
| the section vma. We record the gp value for this object file |
| here, for convenience when doing the GPDISP relocation. */ |
| rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| rel->address = r_vaddr; |
| rel->addend = gp_value; |
| break; |
| |
| case ALPHA_R_NW_RELOC: |
| /* If this is SETGP, we set the addend to 0. Otherwise we set |
| the addend to the size of the .lita section (this is |
| r_symndx) plus 1. We have already set the address of the |
| reloc to r_vaddr. */ |
| if (r_size == ALPHA_R_NW_RELOC_SETGP) |
| { |
| gp_value = r_vaddr; |
| rel->addend = 0; |
| } |
| else if (r_size == ALPHA_R_NW_RELOC_LITA) |
| { |
| lita_address = r_vaddr; |
| rel->addend = r_symndx + 1; |
| } |
| else |
| BFD_ASSERT (0); |
| rel->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (r_type == ALPHA_R_NW_RELOC) |
| rel->howto = &nlm32_alpha_nw_howto; |
| else |
| rel->howto = &nlm32_alpha_howto_table[r_type]; |
| |
| return TRUE; |
| } |
| |
| /* Mangle Alpha NLM relocs for output. */ |
| |
| static bfd_boolean |
| nlm_alpha_mangle_relocs (abfd, sec, data, offset, count) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| asection *sec ATTRIBUTE_UNUSED; |
| const PTR data ATTRIBUTE_UNUSED; |
| bfd_vma offset ATTRIBUTE_UNUSED; |
| bfd_size_type count ATTRIBUTE_UNUSED; |
| { |
| return TRUE; |
| } |
| |
| /* Read an ALPHA NLM import record */ |
| |
| static bfd_boolean |
| nlm_alpha_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; |
| bfd_size_type amt; |
| |
| if (bfd_bread ((PTR) &symlength, (bfd_size_type) sizeof (symlength), abfd) |
| != sizeof (symlength)) |
| return FALSE; |
| sym -> symbol.the_bfd = abfd; |
| name = bfd_alloc (abfd, (bfd_size_type) symlength + 1); |
| if (name == NULL) |
| return FALSE; |
| if (bfd_bread (name, (bfd_size_type) symlength, 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_ptr; |
| if (bfd_bread ((PTR) temp, (bfd_size_type) sizeof (temp), abfd) |
| != sizeof (temp)) |
| return FALSE; |
| rcount = H_GET_32 (abfd, temp); |
| amt = rcount * sizeof (struct nlm_relent); |
| nlm_relocs = (struct nlm_relent *) bfd_alloc (abfd, amt); |
| if (!nlm_relocs) |
| return FALSE; |
| sym -> relocs = nlm_relocs; |
| sym -> rcnt = 0; |
| while (sym -> rcnt < rcount) |
| { |
| asection *section; |
| |
| if (! nlm_alpha_read_reloc (abfd, sym, §ion, &nlm_relocs -> reloc)) |
| return FALSE; |
| nlm_relocs -> section = section; |
| nlm_relocs++; |
| sym -> rcnt++; |
| } |
| |
| return TRUE; |
| } |
| |
| /* Write an Alpha NLM reloc. */ |
| |
| static bfd_boolean |
| nlm_alpha_write_import (abfd, sec, rel) |
| bfd *abfd; |
| asection *sec; |
| arelent *rel; |
| { |
| asymbol *sym; |
| bfd_vma r_vaddr; |
| long r_symndx; |
| int r_type, r_extern, r_offset, r_size; |
| struct nlm32_alpha_external_reloc ext; |
| |
| sym = *rel->sym_ptr_ptr; |
| |
| /* Get values for the relocation fields. */ |
| r_type = rel->howto->type; |
| if (r_type != ALPHA_R_NW_RELOC) |
| { |
| r_vaddr = bfd_get_section_vma (abfd, sec) + rel->address; |
| if ((sec->flags & SEC_CODE) == 0) |
| r_vaddr += bfd_section_size (abfd, |
| bfd_get_section_by_name (abfd, |
| NLM_CODE_NAME)); |
| if (bfd_is_und_section (bfd_get_section (sym))) |
| { |
| r_extern = 1; |
| r_symndx = 0; |
| } |
| else |
| { |
| r_extern = 0; |
| if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE) |
| r_symndx = ALPHA_RELOC_SECTION_TEXT; |
| else |
| r_symndx = ALPHA_RELOC_SECTION_DATA; |
| } |
| r_offset = 0; |
| r_size = 0; |
| |
| switch (r_type) |
| { |
| case ALPHA_R_LITUSE: |
| case ALPHA_R_GPDISP: |
| r_symndx = rel->addend; |
| break; |
| |
| case ALPHA_R_OP_STORE: |
| r_size = rel->addend & 0xff; |
| r_offset = (rel->addend >> 8) & 0xff; |
| break; |
| |
| case ALPHA_R_OP_PUSH: |
| case ALPHA_R_OP_PSUB: |
| case ALPHA_R_OP_PRSHIFT: |
| r_vaddr = rel->addend; |
| break; |
| |
| case ALPHA_R_IGNORE: |
| r_vaddr = rel->address; |
| break; |
| |
| default: |
| break; |
| } |
| } |
| else |
| { |
| /* r_type == ALPHA_R_NW_RELOC */ |
| r_vaddr = rel->address; |
| if (rel->addend == 0) |
| { |
| r_symndx = 0; |
| r_size = ALPHA_R_NW_RELOC_SETGP; |
| } |
| else |
| { |
| r_symndx = rel->addend - 1; |
| r_size = ALPHA_R_NW_RELOC_LITA; |
| } |
| r_extern = 0; |
| r_offset = 0; |
| } |
| |
| /* Swap out the relocation fields. */ |
| H_PUT_64 (abfd, r_vaddr, ext.r_vaddr); |
| H_PUT_32 (abfd, r_symndx, ext.r_symndx); |
| |
| BFD_ASSERT (bfd_little_endian (abfd)); |
| |
| ext.r_bits[0] = ((r_type << RELOC_BITS0_TYPE_SH_LITTLE) |
| & RELOC_BITS0_TYPE_LITTLE); |
| ext.r_bits[1] = ((r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0) |
| | ((r_offset << RELOC_BITS1_OFFSET_SH_LITTLE) |
| & RELOC_BITS1_OFFSET_LITTLE)); |
| ext.r_bits[2] = 0; |
| ext.r_bits[3] = ((r_size << RELOC_BITS3_SIZE_SH_LITTLE) |
| & RELOC_BITS3_SIZE_LITTLE); |
| |
| /* Write out the relocation. */ |
| if (bfd_bwrite (&ext, (bfd_size_type) sizeof ext, abfd) != sizeof ext) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| /* Alpha NetWare does not use the high bit to determine whether a |
| public symbol is in the code segment or the data segment. Instead, |
| it just uses the address. The set_public_section and |
| get_public_offset routines override the default code which uses the |
| high bit. */ |
| |
| /* Set the section for a public symbol. */ |
| |
| static bfd_boolean |
| nlm_alpha_set_public_section (abfd, sym) |
| bfd *abfd; |
| nlmNAME(symbol_type) *sym; |
| { |
| asection *code_sec, *data_sec; |
| |
| code_sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); |
| data_sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); |
| if (sym->symbol.value < bfd_section_size (abfd, code_sec)) |
| { |
| sym->symbol.section = code_sec; |
| sym->symbol.flags |= BSF_FUNCTION; |
| } |
| else |
| { |
| sym->symbol.section = data_sec; |
| sym->symbol.value -= bfd_section_size (abfd, code_sec); |
| /* The data segment had better be aligned. */ |
| BFD_ASSERT ((bfd_section_size (abfd, code_sec) & 0xf) == 0); |
| } |
| return TRUE; |
| } |
| |
| /* Get the offset to write out for a public symbol. */ |
| |
| static bfd_vma |
| nlm_alpha_get_public_offset (abfd, sym) |
| bfd *abfd ATTRIBUTE_UNUSED; |
| asymbol *sym; |
| { |
| return bfd_asymbol_value (sym); |
| } |
| |
| /* Write an Alpha NLM external symbol. */ |
| |
| static bfd_boolean |
| nlm_alpha_write_external (abfd, count, sym, relocs) |
| bfd *abfd; |
| bfd_size_type count; |
| asymbol *sym; |
| struct reloc_and_sec *relocs; |
| { |
| bfd_size_type i; |
| bfd_byte len; |
| unsigned char temp[NLM_TARGET_LONG_SIZE]; |
| arelent r; |
| |
| len = strlen (sym->name); |
| if ((bfd_bwrite (&len, (bfd_size_type) sizeof (bfd_byte), abfd) |
| != sizeof (bfd_byte)) |
| || bfd_bwrite (sym->name, (bfd_size_type) len, abfd) != len) |
| return FALSE; |
| |
| bfd_put_32 (abfd, count + 2, temp); |
| if (bfd_bwrite (temp, (bfd_size_type) sizeof (temp), abfd) != sizeof (temp)) |
| return FALSE; |
| |
| /* The first two relocs for each external symbol are the .lita |
| address and the GP value. */ |
| r.sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| r.howto = &nlm32_alpha_nw_howto; |
| |
| r.address = nlm_alpha_backend_data (abfd)->lita_address; |
| r.addend = nlm_alpha_backend_data (abfd)->lita_size + 1; |
| if (! nlm_alpha_write_import (abfd, (asection *) NULL, &r)) |
| return FALSE; |
| |
| r.address = nlm_alpha_backend_data (abfd)->gp; |
| r.addend = 0; |
| if (! nlm_alpha_write_import (abfd, (asection *) NULL, &r)) |
| return FALSE; |
| |
| for (i = 0; i < count; i++) |
| { |
| if (! nlm_alpha_write_import (abfd, relocs[i].sec, relocs[i].rel)) |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| #include "nlmswap.h" |
| |
| static const struct nlm_backend_data nlm32_alpha_backend = |
| { |
| "NetWare Alpha Module \032", |
| sizeof (Nlm32_alpha_External_Fixed_Header), |
| sizeof (struct nlm32_alpha_external_prefix_header), |
| bfd_arch_alpha, |
| 0, |
| TRUE, /* no uninitialized data permitted by Alpha NetWare. */ |
| nlm_alpha_backend_object_p, |
| nlm_alpha_write_prefix, |
| nlm_alpha_read_reloc, |
| nlm_alpha_mangle_relocs, |
| nlm_alpha_read_import, |
| nlm_alpha_write_import, |
| nlm_alpha_set_public_section, |
| nlm_alpha_get_public_offset, |
| nlm_swap_fixed_header_in, |
| nlm_swap_fixed_header_out, |
| nlm_alpha_write_external, |
| 0, /* write_export */ |
| }; |
| |
| #define TARGET_LITTLE_NAME "nlm32-alpha" |
| #define TARGET_LITTLE_SYM nlmNAME(alpha_vec) |
| #define TARGET_BACKEND_DATA &nlm32_alpha_backend |
| |
| #include "nlm-target.h" |