aboutsummaryrefslogtreecommitdiff
path: root/bfd/aout-cris.c
diff options
context:
space:
mode:
authorHans-Peter Nilsson <hp@axis.com>2000-07-20 16:21:07 +0000
committerHans-Peter Nilsson <hp@axis.com>2000-07-20 16:21:07 +0000
commit06c15ad74f391b3c7197cce61f70f0ae7dd3fb8e (patch)
tree29cd2f9cddf002f65f05bbab8282c9f56ca7ff44 /bfd/aout-cris.c
parent19e3be22a42ccf898065738decc2908fcb86924e (diff)
downloadgdb-06c15ad74f391b3c7197cce61f70f0ae7dd3fb8e.zip
gdb-06c15ad74f391b3c7197cce61f70f0ae7dd3fb8e.tar.gz
gdb-06c15ad74f391b3c7197cce61f70f0ae7dd3fb8e.tar.bz2
* Makefile.am (ALL_MACHINES): Add cpu-cris.lo.
(ALL_MACHINES_CFILES): Add cpu-cris.c. (BFD32_BACKENDS): Add aout-cris.lo and elf32-cris.lo. (BFD32_BACKENDS_CFILES): Add aout-cris.c and elf32-cris.c. (cpu-cris.lo, aout-cris.lo, elf32-cris.lo): New rules. * Makefile.in: Rebuild. * aclocal.m4: Rebuild. * aoutx.h (NAME(aout,machine_type)): Add case for bfd_arch_cris. * archures.c (enum bfd_architecture): Add bfd_arch_cris. (bfd_cris_arch): Declare. (bfd_archures_list): Add bfd_cris_arch. * bfd-in2.h: Rebuild. * config.bfd: (cris-*-*): New target. * configure.in (bfd_elf32_cris_vec, cris_aout_vec): New vectors. * configure: Rebuild. * elf.c (prep_headers): Add bfd_arch_cris. * libbfd.h: Rebuild. * libaout.h (enum machine_type): Add M_CRIS. * reloc.c: Add CRIS relocations. * targets.c (bfd_target bfd_elf32_cris_vec, cris_aout_vec): Declare. (bfd_target_vect): Add bfd_elf32_cris_vec and cris_aout_vec. * cpu-cris.c, aout-cris.c, elf32-cris.c: New files. * po/POTFILES.in, po/bfd.pot: Regenerate.
Diffstat (limited to 'bfd/aout-cris.c')
-rw-r--r--bfd/aout-cris.c298
1 files changed, 298 insertions, 0 deletions
diff --git a/bfd/aout-cris.c b/bfd/aout-cris.c
new file mode 100644
index 0000000..36f8553
--- /dev/null
+++ b/bfd/aout-cris.c
@@ -0,0 +1,298 @@
+/* BFD backend for CRIS a.out binaries.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ Contributed by Axis Communications AB.
+ Written by Hans-Peter Nilsson.
+
+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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* See info in the file PORTING for documentation of these macros and
+ functions. Beware; some of the information there is outdated. */
+
+#define N_HEADER_IN_TEXT(x) 0
+#define BYTES_IN_WORD 4
+#define N_TXTOFF(x) 32
+#define ENTRY_CAN_BE_ZERO
+#define TEXT_START_ADDR 0
+
+/* If you change this to 4, you can not link to an address N*4+2. */
+#define SEGMENT_SIZE 2
+
+/* For some reason, if the a.out file has Z_MAGIC, then
+ adata(abfd).exec_bytes_size is not used, but rather
+ adata(abfd).zmagic_disk_block_size, even though the exec_header is
+ *not* included in the text segment. A simple workaround is to
+ #define ZMAGIC_DISK_BLOCK_SIZE, which is used if defined; otherwise
+ TARGET_PAGE_SIZE is used. */
+#define ZMAGIC_DISK_BLOCK_SIZE N_TXTOFF (0)
+
+/* It seems odd at first to set a page-size this low, but gives greater
+ freedom in where things can be linked. The drawback is that you have
+ to set alignment and padding in linker scripts. */
+#define TARGET_PAGE_SIZE SEGMENT_SIZE
+#define TARGETNAME "a.out-cris"
+
+/* N_SHARED_LIB gets this reasonable default as of 1999-07-12, but we
+ have to work with 2.9.1. Note that N_SHARED_LIB is used in a
+ SUN-specific context, not applicable to CRIS. */
+#define N_SHARED_LIB(x) 0
+
+/* The definition here seems not used; just provided as a convention. */
+#define DEFAULT_ARCH bfd_arch_cris
+
+/* ??? Spacing might be essential for the parameters in this macro.
+ Do Not Change. */
+#define MY(OP) CAT (cris_aout_,OP)
+#define NAME(x,y) CAT3(cris_aout,_32_,y)
+
+#include "bfd.h"
+
+/* Version 1 of the header. */
+#define MY_exec_hdr_flags 1
+
+#define MY_write_object_contents MY(write_object_contents)
+static boolean MY(write_object_contents) PARAMS ((bfd *));
+
+/* Forward this, so we can use a pointer to it in PARAMS. */
+struct reloc_ext_external;
+
+#define MY_swap_ext_reloc_out MY(swap_ext_reloc_out)
+static void MY(swap_ext_reloc_out) PARAMS ((bfd *, arelent *,
+ struct reloc_ext_external *));
+
+#define MY_swap_ext_reloc_in MY(swap_ext_reloc_in)
+static void MY(swap_ext_reloc_in) PARAMS ((bfd *, struct
+ reloc_ext_external *,
+ arelent *, asymbol **,
+ bfd_size_type));
+
+#define MY_set_sizes MY(set_sizes)
+static boolean MY(set_sizes) PARAMS ((bfd *));
+
+/* To set back reloc_size to ext, we make MY(set_sizes) be called
+ through this construct. Note that MY_set_arch_mach is only called
+ through SET_ARCH_MACH. The default bfd_default_set_arch_mach will
+ not call set_sizes. */
+
+#define MY_set_arch_mach NAME (aout, set_arch_mach)
+#define SET_ARCH_MACH(BFD, EXEC) \
+ MY_set_arch_mach (BFD, DEFAULT_ARCH, N_MACHTYPE (EXEC))
+
+/* These macros describe the binary layout of the reloc information we
+ use in a file. */
+#define RELOC_EXT_BITS_EXTERN_LITTLE 0x80
+#define RELOC_EXT_BITS_TYPE_LITTLE 3
+#define RELOC_EXT_BITS_TYPE_SH_LITTLE 0
+
+#ifndef MY_get_section_contents
+#define MY_get_section_contents aout_32_get_section_contents
+#endif
+
+/* Include generic functions (some are overridden above). */
+#include "aout32.c"
+#include "aout-target.h"
+
+
+/* We need our own version to set header flags. */
+
+static boolean
+MY(write_object_contents) (abfd)
+ bfd *abfd;
+{
+ struct external_exec exec_bytes;
+ struct internal_exec *execp = exec_hdr (abfd);
+
+ /* We set the reloc type to RELOC_EXT_SIZE, although setting it at all
+ seems unnecessary when inspecting as and ld behavior (not an
+ exhaustive inspection). The default write_object_contents
+ definition sets RELOC_EXT_SIZE, so we follow suite and set it too. */
+ obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
+
+ /* Setting N_SET_MACHTYPE and using N_SET_FLAGS is not performed by
+ the default definition. */
+ if (bfd_get_arch(abfd) == bfd_arch_cris)
+ N_SET_MACHTYPE(*execp, M_CRIS);
+
+ N_SET_FLAGS (*execp, aout_backend_info (abfd)->exec_hdr_flags);
+
+ WRITE_HEADERS (abfd, execp);
+
+ return true;
+}
+
+
+/* We need our own for these reasons:
+ - Assert that a normal 8, 16 or 32 reloc is output.
+ - Fix what seems to be a weak-bug (perhaps there for valid reasons). */
+
+static void
+MY(swap_ext_reloc_out) (abfd, g, natptr)
+ bfd *abfd;
+ arelent *g;
+ struct reloc_ext_external *natptr;
+{
+ int r_index;
+ int r_extern;
+ unsigned int r_type;
+ unsigned int r_addend;
+ asymbol *sym = *(g->sym_ptr_ptr);
+ asection *output_section = sym->section->output_section;
+
+ PUT_WORD (abfd, g->address, natptr->r_address);
+
+ r_type = (unsigned int) g->howto->type;
+
+ r_addend = g->addend;
+ if ((sym->flags & BSF_SECTION_SYM) != 0)
+ r_addend += (*(g->sym_ptr_ptr))->section->output_section->vma;
+
+ /* If this relocation is relative to a symbol then set the
+ r_index to the symbols index, and the r_extern bit.
+
+ Absolute symbols can come in in two ways, either as an offset
+ from the abs section, or as a symbol which has an abs value.
+ check for that here. */
+
+ if (bfd_is_abs_section (bfd_get_section (sym)))
+ {
+ r_extern = 0;
+ r_index = N_ABS;
+ }
+ else if ((sym->flags & BSF_SECTION_SYM) == 0)
+ {
+ if (bfd_is_und_section (bfd_get_section (sym))
+ /* Remember to check for weak symbols; they count as global. */
+ || (sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0)
+ r_extern = 1;
+ else
+ r_extern = 0;
+ r_index = (*(g->sym_ptr_ptr))->KEEPIT;
+ }
+ else
+ {
+ /* Just an ordinary section. */
+ r_extern = 0;
+ r_index = output_section->target_index;
+ }
+
+ /* The relocation type is the same as the canonical ones, but only
+ the first 3 are used: RELOC_8, RELOC_16, RELOC_32.
+ We may change this later, but assert this for the moment. */
+ if (r_type > 2)
+ {
+ (*_bfd_error_handler) (_("%s: Invalid relocation type exported: %d"),
+ bfd_get_filename (abfd), r_type);
+
+ bfd_set_error (bfd_error_wrong_format);
+ }
+
+ /* Now the fun stuff. */
+ natptr->r_index[2] = r_index >> 16;
+ natptr->r_index[1] = r_index >> 8;
+ natptr->r_index[0] = r_index;
+ natptr->r_type[0] =
+ (r_extern ? RELOC_EXT_BITS_EXTERN_LITTLE : 0)
+ | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
+
+ PUT_WORD (abfd, r_addend, natptr->r_addend);
+}
+
+
+/* We need our own to assert that a normal 8, 16 or 32 reloc is input. */
+
+static void
+MY(swap_ext_reloc_in) (abfd, bytes, cache_ptr, symbols, symcount)
+ bfd *abfd;
+ struct reloc_ext_external *bytes;
+ arelent *cache_ptr;
+ asymbol **symbols;
+ bfd_size_type symcount;
+{
+ unsigned int r_index;
+ int r_extern;
+ unsigned int r_type;
+ struct aoutdata *su = &(abfd->tdata.aout_data->a);
+
+ cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
+
+ /* Now the fun stuff. */
+ r_index = (bytes->r_index[2] << 16)
+ | (bytes->r_index[1] << 8)
+ | bytes->r_index[0];
+ r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
+ r_type = ((bytes->r_type[0]) >> RELOC_EXT_BITS_TYPE_SH_LITTLE)
+ & RELOC_EXT_BITS_TYPE_LITTLE;
+
+ if (r_type > 2)
+ {
+ (*_bfd_error_handler) (_("%s: Invalid relocation type imported: %d"),
+ bfd_get_filename (abfd), r_type);
+
+ bfd_set_error(bfd_error_wrong_format);
+ }
+
+ cache_ptr->howto = howto_table_ext + r_type;
+
+ if (r_extern && r_index > symcount)
+ {
+ (*_bfd_error_handler)
+ (_("%s: Bad relocation record imported: %d"),
+ bfd_get_filename (abfd), r_index);
+
+ bfd_set_error (bfd_error_wrong_format);
+
+ /* We continue, so we can catch further errors. */
+ r_extern = 0;
+ r_index = N_ABS;
+ }
+
+ /* Magically uses r_extern, symbols etc. Ugly, but it's what's in the
+ default. */
+ MOVE_ADDRESS (GET_SWORD (abfd, bytes->r_addend));
+}
+
+
+/* We use the same as the default, except that we also set
+ "obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;", to avoid changing
+ NAME (aout, set_arch_mach) in aoutx. */
+
+static boolean
+MY(set_sizes) (abfd)
+ bfd *abfd;
+{
+ /* Just as the default in aout-target.h (with some #ifdefs folded)... */
+
+ adata(abfd).page_size = TARGET_PAGE_SIZE;
+ adata(abfd).segment_size = SEGMENT_SIZE;
+ adata(abfd).zmagic_disk_block_size = ZMAGIC_DISK_BLOCK_SIZE;
+ adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
+
+ /* ... except for that we have the extended reloc. The alternative
+ would be to add a check on bfd_arch_cris in NAME (aout,
+ set_arch_mach) in aoutx.h, but I don't want to do that since
+ target-specific things should not be added there. */
+
+ obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
+
+ return true;
+}
+
+/*
+ * Local variables:
+ * eval: (c-set-style "gnu")
+ * indent-tabs-mode: t
+ * End:
+ */