/* Support for 32-bit PowerPC NLM (NetWare Loadable Module)
- Copyright (C) 1994 Free Software Foundation, Inc.
+ Copyright (C) 1994, 1995, 1999 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
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. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
+/* The format of a PowerPC NLM changed. Define OLDFORMAT to get the
+ old format. */
+
#define ARCH_SIZE 32
#include "nlm/ppc-ext.h"
#include "libnlm.h"
+#ifdef OLDFORMAT
static boolean nlm_powerpc_backend_object_p
PARAMS ((bfd *));
static boolean nlm_powerpc_write_prefix
PARAMS ((bfd *));
+#endif
+
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) *));
+
+#ifdef OLDFORMAT
static boolean nlm_powerpc_write_reloc
PARAMS ((bfd *, asection *, arelent *, int));
+#endif
+
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 *));
+
+#ifndef OLDFORMAT
+static boolean nlm_powerpc_set_public_section
+ PARAMS ((bfd *, nlmNAME(symbol_type) *));
+static bfd_vma nlm_powerpc_get_public_offset
+ PARAMS ((bfd *, asymbol *));
+#endif
\f
+#ifdef OLDFORMAT
+
+/* The prefix header is only used in the old format. */
+
/* 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. */
return true;
}
+
+#endif /* OLDFORMAT */
\f
+#ifndef OLDFORMAT
+
+/* There is only one type of reloc in a PowerPC NLM. */
+
+static reloc_howto_type nlm_powerpc_howto =
+ 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 */
+ "32", /* name */
+ true, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ false); /* pcrel_offset */
+
+/* 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;
+{
+ bfd_byte temp[4];
+ bfd_vma val;
+ const char *name;
+
+ if (bfd_read (temp, sizeof (temp), 1, abfd) != sizeof (temp))
+ return false;
+
+ val = bfd_get_32 (abfd, temp);
+
+ /* The value is a word offset into either the code or data segment.
+ This is the location which needs to be adjusted.
+
+ The high bit is 0 if the value is an offset into the data
+ segment, or 1 if the value is an offset into the text segment.
+
+ If this is a relocation fixup rather than an imported symbol (the
+ sym argument is NULL), then the second most significant bit is 0
+ if the address of the data segment should be added to the
+ location addressed by the value, or 1 if the address of the text
+ segment should be added.
+
+ If this is an imported symbol, the second most significant bit is
+ not used and must be 0. */
+
+ if ((val & NLM_HIBIT) == 0)
+ name = NLM_INITIALIZED_DATA_NAME;
+ else
+ {
+ name = NLM_CODE_NAME;
+ val &=~ NLM_HIBIT;
+ }
+ *secp = bfd_get_section_by_name (abfd, name);
+
+ if (sym == NULL)
+ {
+ if ((val & (NLM_HIBIT >> 1)) == 0)
+ name = NLM_INITIALIZED_DATA_NAME;
+ else
+ {
+ name = NLM_CODE_NAME;
+ val &=~ (NLM_HIBIT >> 1);
+ }
+ rel->sym_ptr_ptr = bfd_get_section_by_name (abfd, name)->symbol_ptr_ptr;
+ }
+
+ rel->howto = &nlm_powerpc_howto;
+
+ rel->address = val << 2;
+ rel->addend = 0;
+
+ return true;
+}
+
+#else /* OLDFORMAT */
+
+/* This reloc handling is only applicable to the old format. */
+
/* How to process the various reloc types. PowerPC NLMs use XCOFF
reloc types, and I have just copied the XCOFF reloc table here. */
/* Read the reloc from the file. */
if (bfd_read (&ext, sizeof ext, 1, abfd) != sizeof ext)
- {
- bfd_set_error (bfd_error_system_call);
- return false;
- }
+ return false;
/* Swap in the fields. */
l_vaddr = bfd_h_get_32 (abfd, ext.l_vaddr);
return true;
}
+#endif /* OLDFORMAT */
+
/* 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;
+ bfd *abfd ATTRIBUTE_UNUSED;
+ asection *sec ATTRIBUTE_UNUSED;
+ PTR data ATTRIBUTE_UNUSED;
+ bfd_vma offset ATTRIBUTE_UNUSED;
+ bfd_size_type count ATTRIBUTE_UNUSED;
{
return true;
}
if (bfd_read ((PTR) &symlength, sizeof (symlength), 1, abfd)
!= sizeof (symlength))
- {
- bfd_set_error (bfd_error_system_call);
- return (false);
- }
+ 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;
- }
+ return false;
if (bfd_read (name, symlength, 1, abfd) != symlength)
- {
- bfd_set_error (bfd_error_system_call);
- return (false);
- }
+ return (false);
name[symlength] = '\0';
sym -> symbol.name = name;
sym -> symbol.flags = 0;
sym -> symbol.value = 0;
- sym -> symbol.section = &bfd_und_section;
+ sym -> symbol.section = bfd_und_section_ptr;
if (bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp))
- {
- bfd_set_error (bfd_error_system_call);
- return (false);
- }
+ 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;
- }
+ return false;
sym -> relocs = nlm_relocs;
sym -> rcnt = 0;
while (sym -> rcnt < rcount)
return true;
}
+#ifndef OLDFORMAT
+
+/* Write a PowerPC NLM reloc. */
+
+static boolean
+nlm_powerpc_write_import (abfd, sec, rel)
+ bfd *abfd;
+ asection *sec;
+ arelent *rel;
+{
+ asymbol *sym;
+ bfd_vma val;
+ bfd_byte temp[4];
+
+ /* PowerPC NetWare only supports one kind of reloc. */
+ if (rel->addend != 0
+ || rel->howto == NULL
+ || rel->howto->rightshift != 0
+ || rel->howto->size != 2
+ || rel->howto->bitsize != 32
+ || rel->howto->bitpos != 0
+ || rel->howto->pc_relative
+ || (rel->howto->src_mask != 0xffffffff && rel->addend != 0)
+ || rel->howto->dst_mask != 0xffffffff)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
+
+ sym = *rel->sym_ptr_ptr;
+
+ /* The value we write out is the offset into the appropriate
+ segment, rightshifted by two. This offset is the section vma,
+ adjusted by the vma of the lowest section in that segment, plus
+ the address of the relocation. */
+ val = bfd_get_section_vma (abfd, sec) + rel->address;
+ if ((val & 3) != 0)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ val >>= 2;
+
+ /* The high bit is 0 if the reloc is in the data section, or 1 if
+ the reloc is in the code section. */
+ if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
+ val -= nlm_get_data_low (abfd);
+ else
+ {
+ val -= nlm_get_text_low (abfd);
+ val |= NLM_HIBIT;
+ }
+
+ if (! bfd_is_und_section (bfd_get_section (sym)))
+ {
+ /* This is an internal relocation fixup. The second most
+ significant bit is 0 if this is a reloc against the data
+ segment, or 1 if it is a reloc against the text segment. */
+ if (bfd_get_section_flags (abfd, bfd_get_section (sym)) & SEC_CODE)
+ val |= NLM_HIBIT >> 1;
+ }
+
+ bfd_put_32 (abfd, val, temp);
+ if (bfd_write (temp, sizeof (temp), 1, abfd) != sizeof (temp))
+ return false;
+
+ return true;
+}
+
+#else /* OLDFORMAT */
+
+/* This is used for the reloc handling in the old format. */
+
/* Write a PowerPC NLM reloc. */
static boolean
unsigned long l_symndx;
int l_rtype;
int l_rsecnm;
- const reloc_howto_type *howto;
+ reloc_howto_type *howto;
bfd_size_type address;
/* Get the sections now, for convenience. */
symsec = bfd_get_section (sym);
if (indx != -1)
{
- BFD_ASSERT (symsec == &bfd_und_section);
+ BFD_ASSERT (bfd_is_und_section (symsec));
l_symndx = indx + 3;
}
else
return nlm_powerpc_write_reloc (abfd, sec, rel, -1);
}
+#endif /* OLDFORMAT */
+
/* 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. */
asymbol *sym;
struct reloc_and_sec *relocs;
{
- int i;
+ unsigned int i;
bfd_byte len;
unsigned char temp[NLM_TARGET_LONG_SIZE];
+#ifdef OLDFORMAT
static int indx;
+#endif
len = strlen (sym->name);
if ((bfd_write (&len, sizeof (bfd_byte), 1, abfd) != sizeof(bfd_byte))
|| bfd_write (sym->name, len, 1, abfd) != len)
- {
- bfd_set_error (bfd_error_system_call);
- return false;
- }
+ return false;
bfd_put_32 (abfd, count, temp);
if (bfd_write (temp, sizeof(temp), 1, abfd) != sizeof (temp))
- {
- bfd_set_error (bfd_error_system_call);
- return false;
- }
+ return false;
for (i = 0; i < count; i++)
{
- if (nlm_powerpc_write_reloc (abfd, relocs[i].sec,
- relocs[i].rel, indx) == false)
+#ifndef OLDFORMAT
+ if (! nlm_powerpc_write_import (abfd, relocs[i].sec, relocs[i].rel))
+ return false;
+#else
+ if (! nlm_powerpc_write_reloc (abfd, relocs[i].sec,
+ relocs[i].rel, indx))
return false;
+#endif
}
+#ifdef OLDFORMAT
++indx;
+#endif
+
+ return true;
+}
+\f
+#ifndef OLDFORMAT
+
+/* PowerPC Netware uses a word offset, not a byte offset, for public
+ symbols. */
+
+/* Set the section for a public symbol. */
+
+static boolean
+nlm_powerpc_set_public_section (abfd, sym)
+ bfd *abfd;
+ nlmNAME(symbol_type) *sym;
+{
+ if (sym->symbol.value & NLM_HIBIT)
+ {
+ sym->symbol.value &= ~NLM_HIBIT;
+ sym->symbol.flags |= BSF_FUNCTION;
+ sym->symbol.section =
+ bfd_get_section_by_name (abfd, NLM_CODE_NAME);
+ }
+ else
+ {
+ sym->symbol.section =
+ bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME);
+ }
+
+ sym->symbol.value <<= 2;
return true;
}
+/* Get the offset to write out for a public symbol. */
+
+static bfd_vma
+nlm_powerpc_get_public_offset (abfd, sym)
+ bfd *abfd;
+ asymbol *sym;
+{
+ bfd_vma offset;
+ asection *sec;
+
+ offset = bfd_asymbol_value (sym);
+ sec = bfd_get_section (sym);
+ if (sec->flags & SEC_CODE)
+ {
+ offset -= nlm_get_text_low (abfd);
+ offset |= NLM_HIBIT;
+ }
+ else if (sec->flags & (SEC_DATA | SEC_ALLOC))
+ {
+ /* SEC_ALLOC is for the .bss section. */
+ offset -= nlm_get_data_low (abfd);
+ }
+ else
+ {
+ /* We can't handle an exported symbol that is not in the code or
+ data segment. */
+ bfd_set_error (bfd_error_invalid_operation);
+ /* FIXME: No way to return error. */
+ abort ();
+ }
+
+ return offset;
+}
+
+#endif /* ! defined (OLDFORMAT) */
+\f
#include "nlmswap.h"
static const struct nlm_backend_data nlm32_powerpc_backend =
{
"NetWare PowerPC Module \032",
sizeof (Nlm32_powerpc_External_Fixed_Header),
+#ifndef OLDFORMAT
+ 0, /* optional_prefix_size */
+#else
sizeof (struct nlm32_powerpc_external_prefix_header),
+#endif
bfd_arch_powerpc,
0,
false,
+#ifndef OLDFORMAT
+ 0, /* backend_object_p */
+ 0, /* write_prefix */
+#else
nlm_powerpc_backend_object_p,
nlm_powerpc_write_prefix,
+#endif
nlm_powerpc_read_reloc,
nlm_powerpc_mangle_relocs,
nlm_powerpc_read_import,
nlm_powerpc_write_import,
+#ifndef OLDFORMAT
+ nlm_powerpc_set_public_section,
+ nlm_powerpc_get_public_offset,
+#else
0, /* set_public_section */
0, /* get_public_offset */
+#endif
nlm_swap_fixed_header_in,
nlm_swap_fixed_header_out,
nlm_powerpc_write_external,
projects / deliverable / binutils-gdb.git / blobdiff