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-rw-r--r--bfd/ecoff.c295
1 files changed, 257 insertions, 38 deletions
diff --git a/bfd/ecoff.c b/bfd/ecoff.c
index 68fe010..4accb5c 100644
--- a/bfd/ecoff.c
+++ b/bfd/ecoff.c
@@ -44,6 +44,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* Prototypes for static functions. */
+static int ecoff_get_magic PARAMS ((bfd *abfd));
static void ecoff_set_symbol_info PARAMS ((bfd *abfd, SYMR *ecoff_sym,
asymbol *asym, int ext,
asymbol **indirect_ptr_ptr));
@@ -93,11 +94,64 @@ ecoff_mkobject (abfd)
/* Always create a .scommon section for every BFD. This is a hack so
that the linker has something to attach scSCommon symbols to. */
- bfd_make_section (abfd, SCOMMON);
+ if (bfd_make_section (abfd, SCOMMON) == NULL)
+ return false;
return true;
}
+/* This is a hook called by coff_real_object_p to create any backend
+ specific information. */
+
+PTR
+ecoff_mkobject_hook (abfd, filehdr, aouthdr)
+ bfd *abfd;
+ PTR filehdr;
+ PTR aouthdr;
+{
+ struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
+ struct internal_aouthdr *internal_a = (struct internal_aouthdr *) aouthdr;
+ ecoff_data_type *ecoff;
+ asection *regsec;
+
+ if (ecoff_mkobject (abfd) == false)
+ return NULL;
+
+ ecoff = ecoff_data (abfd);
+ ecoff->gp_size = 8;
+ ecoff->sym_filepos = internal_f->f_symptr;
+
+ /* Create the .reginfo section to give programs outside BFD a way to
+ see the information stored in the a.out header. See the comment
+ in coff/ecoff.h. */
+ regsec = bfd_make_section (abfd, REGINFO);
+ if (regsec == NULL)
+ return NULL;
+
+ if (internal_a != (struct internal_aouthdr *) NULL)
+ {
+ int i;
+
+ ecoff->text_start = internal_a->text_start;
+ ecoff->text_end = internal_a->text_start + internal_a->tsize;
+ ecoff->gp = internal_a->gp_value;
+ ecoff->gprmask = internal_a->gprmask;
+ for (i = 0; i < 4; i++)
+ ecoff->cprmask[i] = internal_a->cprmask[i];
+ ecoff->fprmask = internal_a->fprmask;
+ if (internal_a->magic == ECOFF_AOUT_ZMAGIC)
+ abfd->flags |= D_PAGED;
+ }
+
+ /* It turns out that no special action is required by the MIPS or
+ Alpha ECOFF backends. They have different information in the
+ a.out header, but we just copy it all (e.g., gprmask, cprmask and
+ fprmask) and let the swapping routines ensure that only relevant
+ information is written out. */
+
+ return (PTR) ecoff;
+}
+
/* This is a hook needed by SCO COFF, but we have nothing to do. */
asection *
@@ -129,6 +183,11 @@ ecoff_new_section_hook (abfd, section)
else if (strcmp (section->name, _BSS) == 0
|| strcmp (section->name, _SBSS) == 0)
section->flags |= SEC_ALLOC;
+ else if (strcmp (section->name, REGINFO) == 0)
+ {
+ section->flags |= SEC_HAS_CONTENTS | SEC_NEVER_LOAD;
+ section->_raw_size = sizeof (struct ecoff_reginfo);
+ }
/* Probably any other section name is SEC_NEVER_LOAD, but I'm
uncertain about .init on some systems and I don't know how shared
@@ -137,7 +196,10 @@ ecoff_new_section_hook (abfd, section)
return true;
}
-/* Determine the machine architecture and type. */
+/* Determine the machine architecture and type. This is called from
+ the generic COFF routines. It is the inverse of ecoff_get_magic,
+ below. This could be an ECOFF backend routine, with one version
+ for each target, but there aren't all that many ECOFF targets. */
boolean
ecoff_set_arch_mach_hook (abfd, filehdr)
@@ -146,6 +208,7 @@ ecoff_set_arch_mach_hook (abfd, filehdr)
{
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
enum bfd_architecture arch;
+ unsigned long mach;
switch (internal_f->f_magic)
{
@@ -153,20 +216,78 @@ ecoff_set_arch_mach_hook (abfd, filehdr)
case MIPS_MAGIC_LITTLE:
case MIPS_MAGIC_BIG:
arch = bfd_arch_mips;
+ mach = 3000;
+ break;
+
+ case MIPS_MAGIC_LITTLE2:
+ case MIPS_MAGIC_BIG2:
+ /* MIPS ISA level 2: the r6000 */
+ arch = bfd_arch_mips;
+ mach = 6000;
+ break;
+
+ case MIPS_MAGIC_LITTLE3:
+ case MIPS_MAGIC_BIG3:
+ /* MIPS ISA level 3: the r4000 */
+ arch = bfd_arch_mips;
+ mach = 4000;
break;
case ALPHA_MAGIC:
arch = bfd_arch_alpha;
+ mach = 0;
break;
default:
arch = bfd_arch_obscure;
+ mach = 0;
break;
}
- bfd_default_set_arch_mach (abfd, arch, (unsigned long) 0);
+ return bfd_default_set_arch_mach (abfd, arch, mach);
+}
- return true;
+/* Get the magic number to use based on the architecture and machine.
+ This is the inverse of ecoff_set_arch_mach_hook, above. */
+
+static int
+ecoff_get_magic (abfd)
+ bfd *abfd;
+{
+ int big, little;
+
+ switch (bfd_get_arch (abfd))
+ {
+ case bfd_arch_mips:
+ switch (bfd_get_mach (abfd))
+ {
+ default:
+ case 0:
+ case 3000:
+ big = MIPS_MAGIC_BIG;
+ little = MIPS_MAGIC_LITTLE;
+ break;
+
+ case 6000:
+ big = MIPS_MAGIC_BIG2;
+ little = MIPS_MAGIC_LITTLE2;
+ break;
+
+ case 4000:
+ big = MIPS_MAGIC_BIG3;
+ little = MIPS_MAGIC_LITTLE3;
+ break;
+ }
+
+ return abfd->xvec->byteorder_big_p ? big : little;
+
+ case bfd_arch_alpha:
+ return ALPHA_MAGIC;
+
+ default:
+ abort ();
+ return 0;
+ }
}
/* Get the section s_flags to use for a section. */
@@ -198,6 +319,8 @@ ecoff_sec_to_styp_flags (name, flags)
styp = STYP_SBSS;
else if (strcmp (name, _INIT) == 0)
styp = STYP_ECOFF_INIT;
+ else if (strcmp (name, _FINI) == 0)
+ styp = STYP_ECOFF_FINI;
else if (flags & SEC_CODE)
styp = STYP_TEXT;
else if (flags & SEC_DATA)
@@ -232,7 +355,8 @@ ecoff_styp_to_sec_flags (abfd, hdr)
/* For 386 COFF, at least, an unloadable text or data section is
actually a shared library section. */
if ((styp_flags & STYP_TEXT)
- || (styp_flags & STYP_ECOFF_INIT))
+ || (styp_flags & STYP_ECOFF_INIT)
+ || (styp_flags & STYP_ECOFF_FINI))
{
if (sec_flags & SEC_NEVER_LOAD)
sec_flags |= SEC_CODE | SEC_SHARED_LIBRARY;
@@ -483,6 +607,8 @@ ecoff_slurp_symbolic_info (abfd)
char *fraw_src;
char *fraw_end;
struct fdr *fdr_ptr;
+ bfd_size_type raw_end;
+ bfd_size_type cb_end;
/* Check whether we've already gotten it, and whether there's any to
get. */
@@ -530,30 +656,34 @@ ecoff_slurp_symbolic_info (abfd)
/* Read all the symbolic information at once. */
raw_base = ecoff_data (abfd)->sym_filepos + external_hdr_size;
- if (internal_symhdr->cbExtOffset != 0)
- raw_size = (internal_symhdr->cbExtOffset
- - raw_base
- + internal_symhdr->iextMax * backend->external_ext_size);
- else
- {
- long cbline, issmax, issextmax;
-
- cbline = (internal_symhdr->cbLine + 3) &~ 3;
- issmax = (internal_symhdr->issMax + 3) &~ 3;
- issextmax = (internal_symhdr->issExtMax + 3) &~ 3;
- raw_size = (cbline * sizeof (unsigned char)
- + internal_symhdr->idnMax * backend->external_dnr_size
- + internal_symhdr->ipdMax * backend->external_pdr_size
- + internal_symhdr->isymMax * backend->external_sym_size
- + internal_symhdr->ioptMax * backend->external_opt_size
- + internal_symhdr->iauxMax * sizeof (union aux_ext)
- + issmax * sizeof (char)
- + issextmax * sizeof (char)
- + internal_symhdr->ifdMax * backend->external_fdr_size
- + internal_symhdr->crfd * backend->external_rfd_size
- + internal_symhdr->iextMax * backend->external_ext_size);
- }
-
+ /* Alpha ecoff makes the determination of raw_size difficult. It has
+ an undocumented debug data section between the symhdr and the first
+ documented section. And the ordering of the sections varies between
+ statically and dynamically linked executables.
+ If bfd supports SEEK_END someday, this code could be simplified. */
+
+ raw_end = 0;
+
+#define UPDATE_RAW_END(start, count, size) \
+ cb_end = internal_symhdr->start + internal_symhdr->count * (size); \
+ if (cb_end > raw_end) \
+ raw_end = cb_end
+
+ UPDATE_RAW_END (cbLineOffset, cbLine, sizeof (unsigned char));
+ UPDATE_RAW_END (cbDnOffset, idnMax, backend->external_dnr_size);
+ UPDATE_RAW_END (cbPdOffset, ipdMax, backend->external_pdr_size);
+ UPDATE_RAW_END (cbSymOffset, isymMax, backend->external_sym_size);
+ UPDATE_RAW_END (cbOptOffset, ioptMax, backend->external_opt_size);
+ UPDATE_RAW_END (cbAuxOffset, iauxMax, sizeof (union aux_ext));
+ UPDATE_RAW_END (cbSsOffset, issMax, sizeof (char));
+ UPDATE_RAW_END (cbSsExtOffset, issExtMax, sizeof (char));
+ UPDATE_RAW_END (cbFdOffset, ifdMax, backend->external_fdr_size);
+ UPDATE_RAW_END (cbRfdOffset, crfd, backend->external_rfd_size);
+ UPDATE_RAW_END (cbExtOffset, iextMax, backend->external_ext_size);
+
+#undef UPDATE_RAW_END
+
+ raw_size = raw_end - raw_base;
if (raw_size == 0)
{
ecoff_data (abfd)->sym_filepos = 0;
@@ -2821,16 +2951,63 @@ ecoff_set_arch_mach (abfd, arch, machine)
}
/* Get the size of the section headers. We do not output the .scommon
- section which we created in ecoff_mkobject. */
+ section which we created in ecoff_mkobject, nor do we output any
+ .reginfo section. */
int
ecoff_sizeof_headers (abfd, reloc)
bfd *abfd;
boolean reloc;
{
+ asection *current;
+ int c;
+
+ c = 0;
+ for (current = abfd->sections;
+ current != (asection *)NULL;
+ current = current->next)
+ if (strcmp (current->name, SCOMMON) != 0
+ && strcmp (current->name, REGINFO) != 0)
+ ++c;
+
return (bfd_coff_filhsz (abfd)
+ bfd_coff_aoutsz (abfd)
- + (abfd->section_count - 1) * bfd_coff_scnhsz (abfd));
+ + c * bfd_coff_scnhsz (abfd));
+}
+
+
+/* Get the contents of a section. This is where we handle reading the
+ .reginfo section, which implicitly holds the contents of an
+ ecoff_reginfo structure. */
+
+boolean
+ecoff_get_section_contents (abfd, section, location, offset, count)
+ bfd *abfd;
+ asection *section;
+ PTR location;
+ file_ptr offset;
+ bfd_size_type count;
+{
+ ecoff_data_type *tdata = ecoff_data (abfd);
+ struct ecoff_reginfo s;
+ int i;
+
+ if (strcmp (section->name, REGINFO) != 0)
+ return bfd_generic_get_section_contents (abfd, section, location,
+ offset, count);
+
+ s.gp_value = tdata->gp;
+ s.gprmask = tdata->gprmask;
+ for (i = 0; i < 4; i++)
+ s.cprmask[i] = tdata->cprmask[i];
+ s.fprmask = tdata->fprmask;
+
+ /* bfd_get_section_contents has already checked that the offset and
+ size is reasonable. We don't have to worry about swapping or any
+ such thing; the .reginfo section is defined such that the
+ contents are an ecoff_reginfo structure as seen on the host. */
+ memcpy (location, ((char *) &s) + offset, count);
+ return true;
}
/* Calculate the file position for each section, and set
@@ -2857,7 +3034,8 @@ ecoff_compute_section_file_positions (abfd)
{
/* Only deal with sections which have contents */
if ((current->flags & (SEC_HAS_CONTENTS | SEC_LOAD)) == 0
- || strcmp (current->name, SCOMMON) == 0)
+ || strcmp (current->name, SCOMMON) == 0
+ || strcmp (current->name, REGINFO) == 0)
continue;
/* On Ultrix, the data sections in an executable file must be
@@ -2893,7 +3071,9 @@ ecoff_compute_section_file_positions (abfd)
ecoff_data (abfd)->reloc_filepos = sofar;
}
-/* Set the contents of a section. */
+/* Set the contents of a section. This is where we handle setting the
+ contents of the .reginfo section, which implicitly holds a
+ ecoff_reginfo structure. */
boolean
ecoff_set_section_contents (abfd, section, location, offset, count)
@@ -2906,6 +3086,40 @@ ecoff_set_section_contents (abfd, section, location, offset, count)
if (abfd->output_has_begun == false)
ecoff_compute_section_file_positions (abfd);
+ if (strcmp (section->name, REGINFO) == 0)
+ {
+ ecoff_data_type *tdata = ecoff_data (abfd);
+ struct ecoff_reginfo s;
+ int i;
+
+ /* If the caller is only changing part of the structure, we must
+ retrieve the current information before the memcpy. */
+ if (offset != 0 || count != sizeof (struct ecoff_reginfo))
+ {
+ s.gp_value = tdata->gp;
+ s.gprmask = tdata->gprmask;
+ for (i = 0; i < 4; i++)
+ s.cprmask[i] = tdata->cprmask[i];
+ s.fprmask = tdata->fprmask;
+ }
+
+ /* bfd_set_section_contents has already checked that the offset
+ and size is reasonable. We don't have to worry about
+ swapping or any such thing; the .reginfo section is defined
+ such that the contents are an ecoff_reginfo structure as seen
+ on the host. */
+ memcpy (((char *) &s) + offset, location, count);
+
+ tdata->gp = s.gp_value;
+ tdata->gprmask = s.gprmask;
+ for (i = 0; i < 4; i++)
+ tdata->cprmask[i] = s.cprmask[i];
+ tdata->fprmask = s.fprmask;
+
+ return true;
+
+ }
+
bfd_seek (abfd, (file_ptr) (section->filepos + offset), SEEK_SET);
if (count != 0)
@@ -2964,7 +3178,8 @@ ecoff_write_object_contents (abfd)
current != (asection *)NULL;
current = current->next)
{
- if (strcmp (current->name, SCOMMON) == 0)
+ if (strcmp (current->name, SCOMMON) == 0
+ || strcmp (current->name, REGINFO) == 0)
continue;
current->target_index = count;
++count;
@@ -3020,6 +3235,13 @@ ecoff_write_object_contents (abfd)
&& current->reloc_count == 0);
continue;
}
+ if (strcmp (current->name, REGINFO) == 0)
+ {
+ BFD_ASSERT ((bfd_get_section_size_before_reloc (current)
+ == sizeof (struct ecoff_reginfo))
+ && current->reloc_count == 0);
+ continue;
+ }
++internal_f.f_nscns;
@@ -3084,10 +3306,7 @@ ecoff_write_object_contents (abfd)
/* Set up the file header. */
- if (abfd->xvec->header_byteorder_big_p != false)
- internal_f.f_magic = backend->big_magic;
- else
- internal_f.f_magic = backend->little_magic;
+ internal_f.f_magic = ecoff_get_magic (abfd);
/* We will NOT put a fucking timestamp in the header here. Every
time you put it back, I will come in and take it out again. I'm
generated by cgit v1.1 at 2024-12-26 09:00:50 +0000