# This shell script emits a C file. -*- C -*-
-# Copyright 2007 Free Software Foundation, Inc.
+# Copyright 2007, 2008, 2009 Free Software Foundation, Inc.
# Contributed by M R Swami Reddy <MR.Swami.Reddy@nsc.com>
#
# This file is part of the GNU Binutils.
/* Flag for the emulation-specific "--no-relax" option. */
static bfd_boolean disable_relaxation = FALSE;
+static void check_sections (bfd *, asection *, void *);
+
+
+/* This function is run after all the input files have been opened. */
+
+static void
+cr16_elf_after_open (void)
+{
+ /* Call the standard elf routine. */
+ gld${EMULATION_NAME}_after_open ();
+
+ if (command_line.embedded_relocs
+ && (! link_info.relocatable))
+ {
+ bfd *abfd;
+
+ /* In the embedded relocs mode we create a .emreloc section for each
+ input file with a nonzero .data section. The BFD backend will fill in
+ these sections with magic numbers which can be used to relocate the
+ data section at run time. */
+ for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
+ {
+ asection *datasec;
+
+ /* As first-order business, make sure that each input BFD is either
+ COFF or ELF. We need to call a special BFD backend function to
+ generate the embedded relocs, and we have such functions only for
+ COFF and ELF. */
+ if (bfd_get_flavour (abfd) != bfd_target_coff_flavour
+ && bfd_get_flavour (abfd) != bfd_target_elf_flavour)
+ einfo ("%F%B: all input objects must be COFF or ELF for --embedded-relocs\n");
+
+ datasec = bfd_get_section_by_name (abfd, ".data.rel");
+
+ /* Note that we assume that the reloc_count field has already
+ been set up. We could call bfd_get_reloc_upper_bound, but
+ that returns the size of a memory buffer rather than a reloc
+ count. We do not want to call bfd_canonicalize_reloc,
+ because although it would always work it would force us to
+ read in the relocs into BFD canonical form, which would waste
+ a significant amount of time and memory. */
+ if (datasec != NULL && datasec->reloc_count > 0)
+ {
+ asection *relsec;
+
+ relsec = bfd_make_section (abfd, ".emreloc");
+ if (relsec == NULL
+ || ! bfd_set_section_flags (abfd, relsec,
+ (SEC_ALLOC
+ | SEC_LOAD
+ | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY))
+ || ! bfd_set_section_alignment (abfd, relsec, 2)
+ || ! bfd_set_section_size (abfd, relsec,
+ datasec->reloc_count * 8))
+ einfo ("%F%B: can not create .emreloc section: %E\n");
+ }
+
+ /* Double check that all other data sections are empty, as is
+ required for embedded PIC code. */
+ bfd_map_over_sections (abfd, check_sections, datasec);
+ }
+ }
+}
+
+/* Check that of the data sections, only the .data section has
+ relocs. This is called via bfd_map_over_sections. */
+
+static void
+check_sections (bfd *abfd, asection *sec, void *datasec)
+{
+ if ((strncmp (bfd_get_section_name (abfd, sec), ".data.rel", 9) == 0)
+ && sec != datasec
+ && sec->reloc_count == 0 )
+ einfo ("%B%X: section %s has relocs; can not use --embedded-relocs\n",
+ abfd, bfd_get_section_name (abfd, sec));
+}
+
static void
cr16elf_after_parse (void)
{
meaninful in CR16 embedded systems. Moreover, when magic_demand_paged
is true the link sometimes fails. */
config.magic_demand_paged = FALSE;
+
+ after_parse_default ();
}
/* This is called after the sections have been attached to output
/* Call the default first. */
gld${EMULATION_NAME}_before_allocation ();
+ if (command_line.embedded_relocs
+ && (! link_info.relocatable))
+ {
+
+ bfd *abfd;
+
+ /* If we are generating embedded relocs, call a special BFD backend
+ routine to do the work. */
+ for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
+ {
+ asection *datasec, *relsec;
+ char *errmsg;
+
+ datasec = bfd_get_section_by_name (abfd, ".data.rel");
+
+ if (datasec == NULL || datasec->reloc_count == 0)
+ continue;
+
+ relsec = bfd_get_section_by_name (abfd, ".emreloc");
+ ASSERT (relsec != NULL);
+
+ if (! bfd_cr16_elf32_create_embedded_relocs (abfd, &link_info,
+ datasec, relsec,
+ &errmsg))
+ {
+ if (errmsg == NULL)
+ einfo ("%B%X: can not create runtime reloc information: %E\n",
+ abfd);
+ else
+ einfo ("%X%B: can not create runtime reloc information: %s\n",
+ abfd, errmsg);
+ }
+ }
+ }
+
/* Enable relaxation by default if the "--no-relax" option was not
specified. This is done here instead of in the before_parse hook
because there is a check in main() to prohibit use of --relax and
# Put these extra cr16-elf routines in ld_${EMULATION_NAME}_emulation
#
+LDEMUL_AFTER_OPEN=cr16_elf_after_open
LDEMUL_AFTER_PARSE=cr16elf_after_parse
LDEMUL_BEFORE_ALLOCATION=cr16elf_before_allocation
projects / msp430-binutils.git / blobdiff