#include <sys/file.h>
#include <assert.h>
#include <getopt.h>
-#include <bfd.h>
+#include "bfd.h"
+#include "libiberty.h"
#include "sysdep.h"
#include "bucomm.h"
/* Internal BFD NLM header. */
#include "libnlm.h"
#include "nlmconv.h"
-/* Needed for Alpha support. */
+#ifdef NLMCONV_ALPHA
#include "coff/sym.h"
#include "coff/ecoff.h"
+#endif
/* If strerror is just a macro, we want to use the one from libiberty
since it will handle undefined values. */
/* The symbol table. */
static asymbol **symbols;
+/* A section we create in the output file to hold pointers to where
+ the sections of the input file end up. We will put a pointer to
+ this section in the NLM header. These is an entry for each input
+ section. The format is
+ null terminated section name
+ zeroes to adjust to 4 byte boundary
+ 4 byte section data file pointer
+ 4 byte section size
+ We don't need a version number. The way we find this information
+ is by finding a stamp in the NLM header information. If we need to
+ change the format of this information, we can simply change the
+ stamp. */
+static asection *secsec;
+
/* A temporary file name to be unlinked on exit. Actually, for most
errors, we leave it around. It's not clear whether that is helpful
or not. */
static void setup_sections PARAMS ((bfd *, asection *, PTR));
static void copy_sections PARAMS ((bfd *, asection *, PTR));
static void mangle_relocs PARAMS ((bfd *, asection *, arelent ***,
- bfd_size_type *, char *,
+ long *, char *,
bfd_size_type));
-static void i386_mangle_relocs PARAMS ((bfd *, asection *, arelent ***,
- bfd_size_type *, char *,
- bfd_size_type));
-static void alpha_mangle_relocs PARAMS ((bfd *, asection *, arelent ***,
- bfd_size_type *, char *,
- bfd_size_type));
static void default_mangle_relocs PARAMS ((bfd *, asection *, arelent ***,
- bfd_size_type *, char *,
+ long *, char *,
bfd_size_type));
static char *link_inputs PARAMS ((struct string_list *, char *));
static const char *choose_temp_base_try PARAMS ((const char *,
const char *));
static void choose_temp_base PARAMS ((void));
static int pexecute PARAMS ((char *, char *[]));
+
+#ifdef NLMCONV_I386
+static void i386_mangle_relocs PARAMS ((bfd *, asection *, arelent ***,
+ long *, char *,
+ bfd_size_type));
+#endif
+
+#ifdef NLMCONV_ALPHA
+static void alpha_mangle_relocs PARAMS ((bfd *, asection *, arelent ***,
+ long *, char *,
+ bfd_size_type));
+#endif
+
+#ifdef NLMCONV_POWERPC
+static void powerpc_build_stubs PARAMS ((bfd *, bfd *, asymbol ***, long *));
+static void powerpc_resolve_stubs PARAMS ((bfd *, bfd *));
+static void powerpc_mangle_relocs PARAMS ((bfd *, asection *, arelent ***,
+ long *, char *,
+ bfd_size_type));
+#endif
\f
/* The main routine. */
bfd *inbfd;
bfd *outbfd;
asymbol **newsyms, **outsyms;
- unsigned int symcount, newsymalloc, newsymcount;
- asection *bss_sec, *data_sec;
+ long symcount, newsymalloc, newsymcount;
+ long symsize;
+ asection *text_sec, *bss_sec, *data_sec;
bfd_vma vma;
bfd_size_type align;
asymbol *endsym;
- unsigned int i;
+ long i;
char inlead, outlead;
boolean gotstart, gotexit, gotcheck;
struct stat st;
char **matching;
program_name = argv[0];
+ xmalloc_set_program_name (program_name);
bfd_init ();
if (! bfd_check_format_matches (inbfd, bfd_object, &matching))
{
bfd_nonfatal (input_file);
- if (bfd_error == file_ambiguously_recognized)
+ if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
{
list_matching_formats (matching);
free (matching);
if (! bfd_set_file_flags (outbfd, bfd_get_file_flags (inbfd)))
bfd_fatal (bfd_get_filename (outbfd));
- symbols = (asymbol **) xmalloc (get_symtab_upper_bound (inbfd));
+ symsize = bfd_get_symtab_upper_bound (inbfd);
+ if (symsize < 0)
+ bfd_fatal (input_file);
+ symbols = (asymbol **) xmalloc (symsize);
symcount = bfd_canonicalize_symtab (inbfd, symbols);
+ if (symcount < 0)
+ bfd_fatal (input_file);
/* Make sure we have a .bss section. */
bss_sec = bfd_get_section_by_name (outbfd, NLM_UNINITIALIZED_DATA_NAME);
bfd_fatal ("make .bss section");
}
+ /* We store the original section names in the .nlmsections section,
+ so that programs which understand it can resurrect the original
+ sections from the NLM. We will put a pointer to .nlmsections in
+ the NLM header area. */
+ secsec = bfd_make_section (outbfd, ".nlmsections");
+ if (secsec == NULL)
+ bfd_fatal ("make .nlmsections section");
+ if (! bfd_set_section_flags (outbfd, secsec, SEC_HAS_CONTENTS))
+ bfd_fatal ("set .nlmsections flags");
+
+#ifdef NLMCONV_POWERPC
+ /* For PowerPC NetWare we need to build stubs for calls to undefined
+ symbols. Because each stub requires an entry in the TOC section
+ which must be at the same location as other entries in the TOC
+ section, we must do this before determining where the TOC section
+ goes in setup_sections. */
+ if (bfd_get_arch (inbfd) == bfd_arch_powerpc)
+ powerpc_build_stubs (inbfd, outbfd, &symbols, &symcount);
+#endif
+
/* Set up the sections. */
bfd_map_over_sections (inbfd, setup_sections, (PTR) outbfd);
+ text_sec = bfd_get_section_by_name (outbfd, NLM_CODE_NAME);
+
/* The .bss section immediately follows the .data section. */
data_sec = bfd_get_section_by_name (outbfd, NLM_INITIALIZED_DATA_NAME);
if (data_sec != NULL)
/* Force _edata and _end to be defined. This would normally be
done by the linker, but the manipulation of the common
symbols will confuse it. */
- if (bfd_asymbol_name (sym)[0] == '_'
- && bfd_get_section (sym) == &bfd_und_section)
+ if ((sym->flags & BSF_DEBUGGING) == 0
+ && bfd_asymbol_name (sym)[0] == '_'
+ && bfd_is_und_section (bfd_get_section (sym)))
{
if (strcmp (bfd_asymbol_name (sym), "_edata") == 0)
{
sym->section = bss_sec;
endsym = sym;
}
- }
+
+#ifdef NLMCONV_POWERPC
+ /* For PowerPC NetWare, we define __GOT0. This is the start
+ of the .got section. */
+ if (bfd_get_arch (inbfd) == bfd_arch_powerpc
+ && strcmp (bfd_asymbol_name (sym), "__GOT0") == 0)
+ {
+ asection *got_sec;
+
+ got_sec = bfd_get_section_by_name (inbfd, ".got");
+ assert (got_sec != (asection *) NULL);
+ sym->value = got_sec->output_offset;
+ sym->section = got_sec->output_section;
+ }
+#endif
+ }
/* If this is a global symbol, check the export list. */
if ((sym->flags & (BSF_EXPORT | BSF_GLOBAL)) != 0)
/* If it's an undefined symbol, see if it's on the import list.
Change the prefix if necessary. */
- if (bfd_get_section (sym) == &bfd_und_section)
+ if (bfd_is_und_section (bfd_get_section (sym)))
{
register struct string_list *l;
}
/* See if it's one of the special named symbols. */
- if (strcmp (bfd_asymbol_name (sym), start_procedure) == 0)
- {
- if (! bfd_set_start_address (outbfd, bfd_asymbol_value (sym)))
- bfd_fatal ("set start address");
- gotstart = true;
- }
- if (strcmp (bfd_asymbol_name (sym), exit_procedure) == 0)
- {
- nlm_fixed_header (outbfd)->exitProcedureOffset =
- bfd_asymbol_value (sym);
- gotexit = true;
- }
- if (check_procedure != NULL
- && strcmp (bfd_asymbol_name (sym), check_procedure) == 0)
+ if ((sym->flags & BSF_DEBUGGING) == 0)
{
- nlm_fixed_header (outbfd)->checkUnloadProcedureOffset =
- bfd_asymbol_value (sym);
- gotcheck = true;
+ bfd_vma val;
+
+ /* FIXME: If these symbols are not in the .text section, we
+ add the .text section size to the value. This may not be
+ correct for all targets. I'm not sure how this should
+ really be handled. */
+ if (strcmp (bfd_asymbol_name (sym), start_procedure) == 0)
+ {
+ val = bfd_asymbol_value (sym);
+ if (bfd_get_section (sym) == data_sec
+ && text_sec != (asection *) NULL)
+ val += bfd_section_size (outbfd, text_sec);
+ if (! bfd_set_start_address (outbfd, val))
+ bfd_fatal ("set start address");
+ gotstart = true;
+ }
+ if (strcmp (bfd_asymbol_name (sym), exit_procedure) == 0)
+ {
+ val = bfd_asymbol_value (sym);
+ if (bfd_get_section (sym) == data_sec
+ && text_sec != (asection *) NULL)
+ val += bfd_section_size (outbfd, text_sec);
+ nlm_fixed_header (outbfd)->exitProcedureOffset = val;
+ gotexit = true;
+ }
+ if (check_procedure != NULL
+ && strcmp (bfd_asymbol_name (sym), check_procedure) == 0)
+ {
+ val = bfd_asymbol_value (sym);
+ if (bfd_get_section (sym) == data_sec
+ && text_sec != (asection *) NULL)
+ val += bfd_section_size (outbfd, text_sec);
+ nlm_fixed_header (outbfd)->checkUnloadProcedureOffset = val;
+ gotcheck = true;
+ }
}
}
if (endsym != NULL)
- endsym->value = bfd_get_section_size_before_reloc (bss_sec);
+ {
+ endsym->value = bfd_get_section_size_before_reloc (bss_sec);
+
+ /* FIXME: If any relocs referring to _end use inplace addends,
+ then I think they need to be updated. This is handled by
+ i386_mangle_relocs. Is it needed for any other object
+ formats? */
+ }
if (newsymcount == 0)
outsyms = symbols;
|| ! bfd_check_format (sharedbfd, bfd_object))
{
fprintf (stderr, "%s:%s: %s\n", program_name, sharelib_file,
- bfd_errmsg (bfd_error));
+ bfd_errmsg (bfd_get_error ()));
sharelib_file = NULL;
}
else
is what NLMLINK does. */
strncpy (nlm_extended_header (outbfd)->stamp, "MeSsAgEs", 8);
+ strncpy (nlm_cygnus_ext_header (outbfd)->stamp, "CyGnUsEx", 8);
+
/* If the date was not given, force it in. */
if (nlm_version_header (outbfd)->month == 0
&& nlm_version_header (outbfd)->day == 0
strncpy (version_hdr->stamp, "VeRsIoN#", 8);
}
+#ifdef NLMCONV_POWERPC
+ /* Resolve the stubs we build for PowerPC NetWare. */
+ if (bfd_get_arch (inbfd) == bfd_arch_powerpc)
+ powerpc_resolve_stubs (inbfd, outbfd);
+#endif
+
/* Copy over the sections. */
bfd_map_over_sections (inbfd, copy_sections, (PTR) outbfd);
strncpy (nlm_variable_header (outbfd)->oldThreadName, " LONG",
NLM_OLD_THREAD_NAME_LENGTH);
+ nlm_cygnus_ext_header (outbfd)->offset = secsec->filepos;
+ nlm_cygnus_ext_header (outbfd)->length = bfd_section_size (outbfd, secsec);
+
if (! bfd_close (outbfd))
bfd_fatal (output_file);
if (! bfd_close (inbfd))
{
switch (arch)
{
+#ifdef NLMCONV_I386
case bfd_arch_i386:
return "nlm32-i386";
+#endif
+#ifdef NLMCONV_SPARC
case bfd_arch_sparc:
return "nlm32-sparc";
+#endif
+#ifdef NLMCONV_ALPHA
case bfd_arch_alpha:
return "nlm32-alpha";
+#endif
+#ifdef NLMCONV_POWERPC
+ case bfd_arch_powerpc:
+ return "nlm32-powerpc";
+#endif
default:
- fprintf (stderr, "%s: no default NLM format for %s\n",
+ fprintf (stderr, "%s: support not compiled in for %s\n",
program_name, bfd_printable_arch_mach (arch, mach));
exit (1);
/* Avoid warning. */
bfd_vma offset;
bfd_size_type align;
bfd_size_type add;
-
- /* FIXME: We don't want to copy the .reginfo section of an ECOFF
- file. However, I don't have a good way to describe this section.
- We do want to copy the section when using objcopy. */
- if (bfd_get_flavour (inbfd) == bfd_target_ecoff_flavour
- && strcmp (bfd_section_name (inbfd, insec), ".reginfo") == 0)
- return;
+ bfd_size_type secsecsize;
f = bfd_get_section_flags (inbfd, insec);
if (f & SEC_CODE)
bfd_fatal ("set section flags");
bfd_set_reloc (outbfd, outsec, (arelent **) NULL, 0);
+
+ /* For each input section we allocate space for an entry in
+ .nlmsections. */
+ secsecsize = bfd_section_size (outbfd, secsec);
+ secsecsize += strlen (bfd_section_name (inbfd, insec)) + 1;
+ secsecsize = (secsecsize + 3) &~ 3;
+ secsecsize += 8;
+ if (! bfd_set_section_size (outbfd, secsec, secsecsize))
+ bfd_fatal ("set .nlmsections size");
}
/* Copy the section contents. */
asection *insec;
PTR data_ptr;
{
+ static bfd_size_type secsecoff = 0;
bfd *outbfd = (bfd *) data_ptr;
+ const char *inname;
asection *outsec;
bfd_size_type size;
PTR contents;
- bfd_size_type reloc_size;
+ long reloc_size;
+ bfd_byte buf[4];
+ bfd_size_type add;
- /* FIXME: We don't want to copy the .reginfo section of an ECOFF
- file. However, I don't have a good way to describe this section.
- We do want to copy the section when using objcopy. */
- if (bfd_get_flavour (inbfd) == bfd_target_ecoff_flavour
- && strcmp (bfd_section_name (inbfd, insec), ".reginfo") == 0)
- return;
+ inname = bfd_section_name (inbfd, insec);
outsec = insec->output_section;
assert (outsec != NULL);
size = bfd_get_section_size_before_reloc (insec);
- if (size == 0)
- return;
/* FIXME: Why are these necessary? */
insec->_cooked_size = insec->_raw_size;
}
reloc_size = bfd_get_reloc_upper_bound (inbfd, insec);
+ if (reloc_size < 0)
+ bfd_fatal (bfd_get_filename (inbfd));
if (reloc_size != 0)
{
arelent **relocs;
- bfd_size_type reloc_count;
+ long reloc_count;
relocs = (arelent **) xmalloc (reloc_size);
reloc_count = bfd_canonicalize_reloc (inbfd, insec, relocs, symbols);
+ if (reloc_count < 0)
+ bfd_fatal (bfd_get_filename (inbfd));
mangle_relocs (outbfd, insec, &relocs, &reloc_count, (char *) contents,
size);
arelent **combined;
total_count = reloc_count + outsec->reloc_count;
- combined = (arelent **) xmalloc (total_count * sizeof (arelent));
+ combined = (arelent **) xmalloc (total_count * sizeof (arelent *));
memcpy (combined, outsec->orelocation,
- outsec->reloc_count * sizeof (arelent));
+ outsec->reloc_count * sizeof (arelent *));
memcpy (combined + outsec->reloc_count, relocs,
- (size_t) (reloc_count * sizeof (arelent)));
+ (size_t) (reloc_count * sizeof (arelent *)));
free (outsec->orelocation);
reloc_count = total_count;
relocs = combined;
bfd_fatal (bfd_get_filename (outbfd));
free (contents);
}
+
+ /* Add this section to .nlmsections. */
+ if (! bfd_set_section_contents (outbfd, secsec, (PTR) inname, secsecoff,
+ strlen (inname) + 1))
+ bfd_fatal ("set .nlmsection contents");
+ secsecoff += strlen (inname) + 1;
+
+ add = ((secsecoff + 3) &~ 3) - secsecoff;
+ if (add != 0)
+ {
+ bfd_h_put_32 (outbfd, (bfd_vma) 0, buf);
+ if (! bfd_set_section_contents (outbfd, secsec, buf, secsecoff, add))
+ bfd_fatal ("set .nlmsection contents");
+ secsecoff += add;
+ }
+
+ if (contents != NULL)
+ bfd_h_put_32 (outbfd, (bfd_vma) outsec->filepos, buf);
+ else
+ bfd_h_put_32 (outbfd, (bfd_vma) 0, buf);
+ if (! bfd_set_section_contents (outbfd, secsec, buf, secsecoff, 4))
+ bfd_fatal ("set .nlmsection contents");
+ secsecoff += 4;
+
+ bfd_h_put_32 (outbfd, (bfd_vma) size, buf);
+ if (! bfd_set_section_contents (outbfd, secsec, buf, secsecoff, 4))
+ bfd_fatal ("set .nlmsection contents");
+ secsecoff += 4;
}
/* Some, perhaps all, NetWare targets require changing the relocs used
bfd *outbfd;
asection *insec;
arelent ***relocs_ptr;
- bfd_size_type *reloc_count_ptr;
+ long *reloc_count_ptr;
char *contents;
bfd_size_type contents_size;
{
switch (bfd_get_arch (outbfd))
{
+#ifdef NLMCONV_I386
case bfd_arch_i386:
i386_mangle_relocs (outbfd, insec, relocs_ptr, reloc_count_ptr,
contents, contents_size);
break;
+#endif
+#ifdef NLMCONV_ALPHA
case bfd_arch_alpha:
alpha_mangle_relocs (outbfd, insec, relocs_ptr, reloc_count_ptr,
contents, contents_size);
break;
+#endif
+#ifdef NLMCONV_POWERPC
+ case bfd_arch_powerpc:
+ powerpc_mangle_relocs (outbfd, insec, relocs_ptr, reloc_count_ptr,
+ contents, contents_size);
+ break;
+#endif
default:
default_mangle_relocs (outbfd, insec, relocs_ptr, reloc_count_ptr,
contents, contents_size);
bfd *outbfd;
asection *insec;
arelent ***relocs_ptr;
- bfd_size_type *reloc_count_ptr;
+ long *reloc_count_ptr;
char *contents;
bfd_size_type contents_size;
{
if (insec->output_offset != 0)
{
- bfd_size_type reloc_count;
+ long reloc_count;
register arelent **relocs;
- register bfd_size_type i;
+ register long i;
reloc_count = *reloc_count_ptr;
relocs = *relocs_ptr;
(*relocs)->address += insec->output_offset;
}
}
+\f
+#ifdef NLMCONV_I386
/* NetWare on the i386 supports a restricted set of relocs, which are
different from those used on other i386 targets. This routine
bfd *outbfd;
asection *insec;
arelent ***relocs_ptr;
- bfd_size_type *reloc_count_ptr;
+ long *reloc_count_ptr;
char *contents;
bfd_size_type contents_size;
{
- bfd_size_type reloc_count, i;
+ long reloc_count, i;
arelent **relocs;
reloc_count = *reloc_count_ptr;
/* Adjust the reloc for the changes we just made. */
rel->addend = 0;
- if (bfd_get_section (sym) != &bfd_und_section)
+ if (! bfd_is_und_section (bfd_get_section (sym)))
rel->sym_ptr_ptr = bfd_get_section (sym)->symbol_ptr_ptr;
}
}
}
+#endif /* NLMCONV_I386 */
+\f
+#ifdef NLMCONV_ALPHA
+
/* On the Alpha the first reloc for every section must be a special
relocs which hold the GP address. Also, the first reloc in the
file must be a special reloc which holds the address of the .lita
bfd *outbfd;
asection *insec;
register arelent ***relocs_ptr;
- bfd_size_type *reloc_count_ptr;
+ long *reloc_count_ptr;
char *contents;
bfd_size_type contents_size;
{
- bfd_size_type old_reloc_count;
+ long old_reloc_count;
arelent **old_relocs;
register arelent **relocs;
}
*relocs = (arelent *) xmalloc (sizeof (arelent));
- (*relocs)->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
+ (*relocs)->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
(*relocs)->address = nlm_alpha_backend_data (outbfd)->lita_address;
(*relocs)->addend = nlm_alpha_backend_data (outbfd)->lita_size + 1;
(*relocs)->howto = &nlm32_alpha_nw_howto;
++(*reloc_count_ptr);
}
- /* Get the GP value from bfd. It is in the .reginfo section. */
+ /* Get the GP value from bfd. */
if (nlm_alpha_backend_data (outbfd)->gp == 0)
- {
- bfd *inbfd;
- asection *reginfo_sec;
- struct ecoff_reginfo sreginfo;
-
- inbfd = insec->owner;
- assert (bfd_get_flavour (inbfd) == bfd_target_ecoff_flavour);
- reginfo_sec = bfd_get_section_by_name (inbfd, REGINFO);
- if (reginfo_sec != (asection *) NULL
- && bfd_get_section_contents (inbfd, reginfo_sec,
- (PTR) &sreginfo, (file_ptr) 0,
- sizeof sreginfo) != false)
- nlm_alpha_backend_data (outbfd)->gp = sreginfo.gp_value;
- }
+ nlm_alpha_backend_data (outbfd)->gp =
+ bfd_ecoff_get_gp_value (insec->owner);
*relocs = (arelent *) xmalloc (sizeof (arelent));
- (*relocs)->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr;
+ (*relocs)->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
(*relocs)->address = nlm_alpha_backend_data (outbfd)->gp;
(*relocs)->addend = 0;
(*relocs)->howto = &nlm32_alpha_nw_howto;
(*relocs)->address += insec->output_offset;
}
}
+
+#endif /* NLMCONV_ALPHA */
+\f
+#ifdef NLMCONV_POWERPC
+
+/* We keep a linked list of stubs which we must build. Because BFD
+ requires us to know the sizes of all sections before we can set the
+ contents of any, we must figure out which stubs we want to build
+ before we can actually build any of them. */
+
+struct powerpc_stub
+{
+ /* Next stub in linked list. */
+ struct powerpc_stub *next;
+
+ /* Symbol whose value is the start of the stub. This is a symbol
+ whose name begins with `.'. */
+ asymbol *start;
+
+ /* Symbol we are going to create a reloc against. This is a symbol
+ with the same name as START but without the leading `.'. */
+ asymbol *reloc;
+
+ /* The TOC index for this stub. This is the index into the TOC
+ section at which the reloc is created. */
+ unsigned int toc_index;
+};
+
+/* The linked list of stubs. */
+
+static struct powerpc_stub *powerpc_stubs;
+
+/* This is what a stub looks like. The first instruction will get
+ adjusted with the correct TOC index. */
+
+static unsigned long powerpc_stub_insns[] =
+{
+ 0x81820000, /* lwz r12,0(r2) */
+ 0x90410014, /* stw r2,20(r1) */
+ 0x800c0000, /* lwz r0,0(r12) */
+ 0x804c0004, /* lwz r2,r(r12) */
+ 0x7c0903a6, /* mtctr r0 */
+ 0x4e800420, /* bctr */
+ 0, /* Traceback table. */
+ 0xc8000,
+ 0
+};
+
+#define POWERPC_STUB_INSN_COUNT \
+ (sizeof powerpc_stub_insns / sizeof powerpc_stub_insns[0])
+
+#define POWERPC_STUB_SIZE (4 * POWERPC_STUB_INSN_COUNT)
+
+/* Each stub uses a four byte TOC entry. */
+#define POWERPC_STUB_TOC_ENTRY_SIZE (4)
+
+/* The original size of the .got section. */
+static bfd_size_type powerpc_initial_got_size;
+
+/* Look for all undefined symbols beginning with `.', and prepare to
+ build a stub for each one. */
+
+static void
+powerpc_build_stubs (inbfd, outbfd, symbols_ptr, symcount_ptr)
+ bfd *inbfd;
+ bfd *outbfd;
+ asymbol ***symbols_ptr;
+ long *symcount_ptr;
+{
+ asection *stub_sec;
+ asection *got_sec;
+ unsigned int got_base;
+ long i;
+ long symcount;
+ long stubcount;
+
+ /* Make a section to hold stubs. We don't set SEC_HAS_CONTENTS for
+ the section to prevent copy_sections from reading from it. */
+ stub_sec = bfd_make_section (inbfd, ".stubs");
+ if (stub_sec == (asection *) NULL
+ || ! bfd_set_section_flags (inbfd, stub_sec,
+ (SEC_CODE
+ | SEC_RELOC
+ | SEC_ALLOC
+ | SEC_LOAD))
+ || ! bfd_set_section_alignment (inbfd, stub_sec, 2))
+ bfd_fatal (".stubs");
+
+ /* Get the TOC section, which is named .got. */
+ got_sec = bfd_get_section_by_name (inbfd, ".got");
+ if (got_sec == (asection *) NULL)
+ {
+ got_sec = bfd_make_section (inbfd, ".got");
+ if (got_sec == (asection *) NULL
+ || ! bfd_set_section_flags (inbfd, got_sec,
+ (SEC_DATA
+ | SEC_RELOC
+ | SEC_ALLOC
+ | SEC_LOAD
+ | SEC_HAS_CONTENTS))
+ || ! bfd_set_section_alignment (inbfd, got_sec, 2))
+ bfd_fatal (".got");
+ }
+
+ powerpc_initial_got_size = bfd_section_size (inbfd, got_sec);
+ got_base = powerpc_initial_got_size;
+ got_base = (got_base + 3) &~ 3;
+
+ stubcount = 0;
+
+ symcount = *symcount_ptr;
+ for (i = 0; i < symcount; i++)
+ {
+ asymbol *sym;
+ asymbol *newsym;
+ char *newname;
+ struct powerpc_stub *item;
+
+ sym = (*symbols_ptr)[i];
+
+ /* We must make a stub for every undefined symbol whose name
+ starts with '.'. */
+ if (bfd_asymbol_name (sym)[0] != '.'
+ || ! bfd_is_und_section (bfd_get_section (sym)))
+ continue;
+
+ /* Make a new undefined symbol with the same name but without
+ the leading `.'. */
+ newsym = (asymbol *) xmalloc (sizeof (asymbol));
+ *newsym = *sym;
+ newname = (char *) xmalloc (strlen (bfd_asymbol_name (sym)));
+ strcpy (newname, bfd_asymbol_name (sym) + 1);
+ newsym->name = newname;
+
+ /* Define the `.' symbol to be in the stub section. */
+ sym->section = stub_sec;
+ sym->value = stubcount * POWERPC_STUB_SIZE;
+ /* We set the BSF_DYNAMIC flag here so that we can check it when
+ we are mangling relocs. FIXME: This is a hack. */
+ sym->flags = BSF_LOCAL | BSF_DYNAMIC;
+
+ /* Add this stub to the linked list. */
+ item = (struct powerpc_stub *) xmalloc (sizeof (struct powerpc_stub));
+ item->start = sym;
+ item->reloc = newsym;
+ item->toc_index = got_base + stubcount * POWERPC_STUB_TOC_ENTRY_SIZE;
+
+ item->next = powerpc_stubs;
+ powerpc_stubs = item;
+
+ ++stubcount;
+ }
+
+ if (stubcount > 0)
+ {
+ asymbol **s;
+ struct powerpc_stub *l;
+
+ /* Add the new symbols we just created to the symbol table. */
+ *symbols_ptr = (asymbol **) xrealloc ((char *) *symbols_ptr,
+ ((symcount + stubcount)
+ * sizeof (asymbol)));
+ *symcount_ptr += stubcount;
+ s = &(*symbols_ptr)[symcount];
+ for (l = powerpc_stubs; l != (struct powerpc_stub *) NULL; l = l->next)
+ *s++ = l->reloc;
+
+ /* Set the size of the .stubs section and increase the size of
+ the .got section. */
+ if (! bfd_set_section_size (inbfd, stub_sec,
+ stubcount * POWERPC_STUB_SIZE)
+ || ! bfd_set_section_size (inbfd, got_sec,
+ (got_base
+ + (stubcount
+ * POWERPC_STUB_TOC_ENTRY_SIZE))))
+ bfd_fatal ("stub section sizes");
+ }
+
+ /* PowerPC NetWare requires a custom header. We create it here.
+ The first word is the header version number, currently 1. The
+ second word is the timestamp of the input file. Unfortunately,
+ they do not conform to the emergent standard for custom headers.
+ We must fake the version number and timestamp in the offset and
+ length fields. */
+ memcpy (nlm_custom_header (outbfd)->stamp, "CuStHeAd", 8);
+ nlm_custom_header (outbfd)->hdrLength = 0;
+ /* Put version number in dataOffset field. */
+ nlm_custom_header (outbfd)->dataOffset = 1;
+ /* Put timestamp in length field. */
+ {
+ struct stat s;
+
+ if (stat (bfd_get_filename (inbfd), &s) < 0)
+ s.st_mtime = 0;
+ nlm_custom_header (outbfd)->dataLength = s.st_mtime;
+ }
+ /* No data stamp. */
+ memset (nlm_custom_header (outbfd)->dataStamp, 0,
+ sizeof (nlm_custom_header (outbfd)->dataStamp));
+}
+
+/* Resolve all the stubs for PowerPC NetWare. We fill in the contents
+ of the output section, and create new relocs in the TOC. */
+
+static void
+powerpc_resolve_stubs (inbfd, outbfd)
+ bfd *inbfd;
+ bfd *outbfd;
+{
+ bfd_byte buf[POWERPC_STUB_SIZE];
+ unsigned int i;
+ unsigned int stubcount;
+ arelent **relocs;
+ asection *got_sec;
+ arelent **r;
+ struct powerpc_stub *l;
+
+ if (powerpc_stubs == (struct powerpc_stub *) NULL)
+ return;
+
+ for (i = 0; i < POWERPC_STUB_INSN_COUNT; i++)
+ bfd_put_32 (outbfd, (bfd_vma) powerpc_stub_insns[i], buf + i * 4);
+
+ got_sec = bfd_get_section_by_name (inbfd, ".got");
+ assert (got_sec != (asection *) NULL);
+ assert (got_sec->output_section->orelocation == (arelent **) NULL);
+
+ stubcount = 0;
+ for (l = powerpc_stubs; l != (struct powerpc_stub *) NULL; l = l->next)
+ ++stubcount;
+ relocs = (arelent **) xmalloc (stubcount * sizeof (arelent *));
+
+ r = relocs;
+ for (l = powerpc_stubs; l != (struct powerpc_stub *) NULL; l = l->next)
+ {
+ arelent *reloc;
+
+ /* Adjust the first instruction to use the right TOC index. */
+ bfd_put_32 (outbfd, (bfd_vma) powerpc_stub_insns[0] + l->toc_index, buf);
+
+ /* Write this stub out. */
+ if (! bfd_set_section_contents (outbfd,
+ bfd_get_section (l->start),
+ buf,
+ l->start->value,
+ POWERPC_STUB_SIZE))
+ bfd_fatal ("writing stub");
+
+ /* Create a new reloc for the TOC entry. */
+ reloc = (arelent *) xmalloc (sizeof (arelent));
+ reloc->sym_ptr_ptr = &l->reloc;
+ reloc->address = l->toc_index + got_sec->output_offset;
+ reloc->addend = 0;
+ reloc->howto = bfd_reloc_type_lookup (inbfd, BFD_RELOC_32);
+
+ *r++ = reloc;
+ }
+
+ bfd_set_reloc (outbfd, got_sec->output_section, relocs, stubcount);
+}
+
+/* Adjust relocation entries for PowerPC NetWare. We do not output
+ TOC relocations. The object code already contains the offset from
+ the TOC pointer. When the function is called, the TOC register,
+ r2, will be set to the correct TOC value, so there is no need for
+ any further reloc. */
+
+/*ARGSUSED*/
+static void
+powerpc_mangle_relocs (outbfd, insec, relocs_ptr, reloc_count_ptr, contents,
+ contents_size)
+ bfd *outbfd;
+ asection *insec;
+ register arelent ***relocs_ptr;
+ long *reloc_count_ptr;
+ char *contents;
+ bfd_size_type contents_size;
+{
+ const reloc_howto_type *toc_howto;
+ long reloc_count;
+ register arelent **relocs;
+ register long i;
+
+ toc_howto = bfd_reloc_type_lookup (insec->owner, BFD_RELOC_PPC_TOC16);
+ if (toc_howto == (reloc_howto_type *) NULL)
+ abort ();
+
+ /* If this is the .got section, clear out all the contents beyond
+ the initial size. We must do this here because copy_sections is
+ going to write out whatever we return in the contents field. */
+ if (strcmp (bfd_get_section_name (insec->owner, insec), ".got") == 0)
+ memset (contents + powerpc_initial_got_size, 0,
+ (bfd_get_section_size_after_reloc (insec)
+ - powerpc_initial_got_size));
+
+ reloc_count = *reloc_count_ptr;
+ relocs = *relocs_ptr;
+ for (i = 0; i < reloc_count; i++)
+ {
+ arelent *rel;
+ asymbol *sym;
+ bfd_vma symvalue;
+
+ rel = *relocs++;
+ sym = *rel->sym_ptr_ptr;
+
+ /* We must be able to resolve all PC relative relocs at this
+ point. If we get a branch to an undefined symbol we build a
+ stub, since NetWare will resolve undefined symbols into a
+ pointer to a function descriptor. */
+ if (rel->howto->pc_relative)
+ {
+ /* This check for whether a symbol is in the same section as
+ the reloc will be wrong if there is a PC relative reloc
+ between two sections both of which were placed in the
+ same output section. This should not happen. */
+ if (bfd_get_section (sym) != insec->output_section)
+ fprintf (stderr, "%s: unresolved PC relative reloc against %s\n",
+ program_name, bfd_asymbol_name (sym));
+ else
+ {
+ bfd_vma val;
+
+ assert (rel->howto->size == 2 && rel->howto->pcrel_offset);
+ val = bfd_get_32 (outbfd, (bfd_byte *) contents + rel->address);
+ val = ((val &~ rel->howto->dst_mask)
+ | (((val & rel->howto->src_mask)
+ + (sym->value - rel->address)
+ + rel->addend)
+ & rel->howto->dst_mask));
+ bfd_put_32 (outbfd, val, (bfd_byte *) contents + rel->address);
+
+ /* If this reloc is against an stubbed symbol and the
+ next instruction is
+ cror 31,31,31
+ then we replace the next instruction with
+ lwz r2,20(r1)
+ This reloads the TOC pointer after a stub call. */
+ if (bfd_asymbol_name (sym)[0] == '.'
+ && (sym->flags & BSF_DYNAMIC) != 0
+ && (bfd_get_32 (outbfd,
+ (bfd_byte *) contents + rel->address + 4)
+ == 0x4ffffb82)) /* cror 31,31,31 */
+ bfd_put_32 (outbfd, (bfd_vma) 0x80410014, /* lwz r2,20(r1) */
+ (bfd_byte *) contents + rel->address + 4);
+
+ --*reloc_count_ptr;
+ --relocs;
+ memmove (relocs, relocs + 1,
+ (size_t) ((reloc_count - 1) * sizeof (arelent *)));
+ continue;
+ }
+ }
+
+ /* When considering a TOC reloc, we do not want to include the
+ symbol value. The symbol will be start of the TOC section
+ (which is named .got). We do want to include the addend. */
+ if (rel->howto == toc_howto)
+ symvalue = 0;
+ else
+ symvalue = sym->value;
+
+ /* If this is a relocation against a symbol with a value, or
+ there is a reloc addend, we need to update the addend in the
+ object file. */
+ if (symvalue + rel->addend != 0)
+ {
+ bfd_vma val;
+
+ switch (rel->howto->size)
+ {
+ case 1:
+ val = bfd_get_16 (outbfd,
+ (bfd_byte *) contents + rel->address);
+ val = ((val &~ rel->howto->dst_mask)
+ | (((val & rel->howto->src_mask)
+ + symvalue
+ + rel->addend)
+ & rel->howto->dst_mask));
+ if ((bfd_signed_vma) val < - 0x8000
+ || (bfd_signed_vma) val >= 0x8000)
+ fprintf (stderr,
+ "%s: overflow when adjusting relocation against %s\n",
+ program_name, bfd_asymbol_name (sym));
+ bfd_put_16 (outbfd, val, (bfd_byte *) contents + rel->address);
+ break;
+
+ case 2:
+ val = bfd_get_32 (outbfd,
+ (bfd_byte *) contents + rel->address);
+ val = ((val &~ rel->howto->dst_mask)
+ | (((val & rel->howto->src_mask)
+ + symvalue
+ + rel->addend)
+ & rel->howto->dst_mask));
+ bfd_put_32 (outbfd, val, (bfd_byte *) contents + rel->address);
+ break;
+
+ default:
+ abort ();
+ }
+
+ rel->sym_ptr_ptr = bfd_get_section (sym)->symbol_ptr_ptr;
+ rel->addend = 0;
+ }
+
+ /* Now that we have incorporated the addend, remove any TOC
+ relocs. */
+ if (rel->howto == toc_howto)
+ {
+ --*reloc_count_ptr;
+ --relocs;
+ memmove (relocs, relocs + 1,
+ (size_t) ((reloc_count - i) * sizeof (arelent *)));
+ continue;
+ }
+
+ rel->address += insec->output_offset;
+ }
+}
+
+#endif /* NLMCONV_POWERPC */
\f
/* Name of linker. */
#ifndef LD_NAME
projects / deliverable / binutils-gdb.git / blobdiff