|
|
/* Support for 32-bit Alpha NLM (NetWare Loadable Module) |
|
|
Copyright (C) 1993-2014 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 3 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., 51 Franklin Street - Fifth Floor, Boston, |
|
|
MA 02110-1301, 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 "sysdep.h" |
|
|
#include "bfd.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" |
|
|
|
|
|
/* 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 (bfd *abfd) |
|
|
{ |
|
|
struct nlm32_alpha_external_prefix_header s; |
|
|
file_ptr size; |
|
|
|
|
|
if (bfd_bread (&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 (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 (&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, /* Source mask. */ |
|
|
0, /* Dest 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, /* Source mask. */ |
|
|
0xffffffff, /* Dest 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), /* Source mask. */ |
|
|
ONES (64), /* Dest 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, /* Source mask. */ |
|
|
0xffffffff, /* Dest 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, /* Source mask. */ |
|
|
0xffff, /* Dest 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, /* Source mask. */ |
|
|
0, /* Dest 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, /* Source mask. */ |
|
|
0xffff, /* Dest 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, /* Source mask. */ |
|
|
0x1fffff, /* Dest 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, /* Source mask. */ |
|
|
0x3fff, /* Dest 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, /* Source mask. */ |
|
|
0xffff, /* Dest 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, /* Source mask. */ |
|
|
0xffffffff, /* Dest 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), /* Source mask. */ |
|
|
ONES (64), /* Dest 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, /* Source mask. */ |
|
|
0, /* Dest 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, /* Source mask. */ |
|
|
ONES (64), /* Dest 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, /* Source mask. */ |
|
|
0, /* Dest 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, /* Source mask. */ |
|
|
0, /* Dest 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, /* Source mask. */ |
|
|
0, /* Dest 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, /* Source mask. */ |
|
|
0, /* Dest 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 (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 < code_sec->size) |
|
|
{ |
|
|
*secp = code_sec; |
|
|
rel->address = r_vaddr; |
|
|
} |
|
|
else |
|
|
{ |
|
|
*secp = data_sec; |
|
|
rel->address = r_vaddr - code_sec->size; |
|
|
} |
|
|
|
|
|
/* 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 (bfd *abfd ATTRIBUTE_UNUSED, |
|
|
asection *sec ATTRIBUTE_UNUSED, |
|
|
const void * 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 (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 (& 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 (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 = 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 (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_get_section_by_name (abfd, NLM_CODE_NAME) -> size; |
|
|
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 (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 < code_sec->size) |
|
|
{ |
|
|
sym->symbol.section = code_sec; |
|
|
sym->symbol.flags |= BSF_FUNCTION; |
|
|
} |
|
|
else |
|
|
{ |
|
|
sym->symbol.section = data_sec; |
|
|
sym->symbol.value -= code_sec->size; |
|
|
/* The data segment had better be aligned. */ |
|
|
BFD_ASSERT ((code_sec->size & 0xf) == 0); |
|
|
} |
|
|
return TRUE; |
|
|
} |
|
|
|
|
|
/* Get the offset to write out for a public symbol. */ |
|
|
|
|
|
static bfd_vma |
|
|
nlm_alpha_get_public_offset (bfd * abfd ATTRIBUTE_UNUSED, asymbol * sym) |
|
|
{ |
|
|
return bfd_asymbol_value (sym); |
|
|
} |
|
|
|
|
|
/* Write an Alpha NLM external symbol. */ |
|
|
|
|
|
static bfd_boolean |
|
|
nlm_alpha_write_external (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, NULL, &r)) |
|
|
return FALSE; |
|
|
|
|
|
r.address = nlm_alpha_backend_data (abfd)->gp; |
|
|
r.addend = 0; |
|
|
if (! nlm_alpha_write_import (abfd, 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 alpha_nlm32_vec |
|
|
#define TARGET_BACKEND_DATA & nlm32_alpha_backend |
|
|
|
|
|
#include "nlm-target.h"
|
|
|
|
