summaryrefslogtreecommitdiffstats
path: root/binutils-2.22/bfd/elf32-m68hc1x.c
diff options
context:
space:
mode:
Diffstat (limited to 'binutils-2.22/bfd/elf32-m68hc1x.c')
-rw-r--r--binutils-2.22/bfd/elf32-m68hc1x.c172
1 files changed, 160 insertions, 12 deletions
diff --git a/binutils-2.22/bfd/elf32-m68hc1x.c b/binutils-2.22/bfd/elf32-m68hc1x.c
index 961dce4..442a411 100644
--- a/binutils-2.22/bfd/elf32-m68hc1x.c
+++ b/binutils-2.22/bfd/elf32-m68hc1x.c
@@ -1,6 +1,6 @@
/* Motorola 68HC11/HC12-specific support for 32-bit ELF
Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
- 2009, 2010, 2011 Free Software Foundation, Inc.
+ 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
Contributed by Stephane Carrez (stcarrez@nerim.fr)
This file is part of BFD, the Binary File Descriptor library.
@@ -20,8 +20,8 @@
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
-#include "alloca-conf.h"
#include "sysdep.h"
+#include "alloca-conf.h"
#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
@@ -50,7 +50,7 @@ static void m68hc11_elf_set_symbol (bfd* abfd, struct bfd_link_info *info,
static bfd_boolean m68hc11_elf_export_one_stub
(struct bfd_hash_entry *gen_entry, void *in_arg);
-static void scan_sections_for_abi (bfd*, asection*, PTR);
+static void scan_sections_for_abi (bfd*, asection*, void *);
struct m68hc11_scan_param
{
@@ -214,6 +214,20 @@ elf32_m68hc11_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
return TRUE;
}
+/* Merge non-visibility st_other attributes, STO_M68HC12_FAR and
+ STO_M68HC12_INTERRUPT. */
+
+void
+elf32_m68hc11_merge_symbol_attribute (struct elf_link_hash_entry *h,
+ const Elf_Internal_Sym *isym,
+ bfd_boolean definition,
+ bfd_boolean dynamic ATTRIBUTE_UNUSED)
+{
+ if (definition)
+ h->other = ((isym->st_other & ~ELF_ST_VISIBILITY (-1))
+ | ELF_ST_VISIBILITY (h->other));
+}
+
/* External entry points for sizing and building linker stubs. */
/* Set up various things so that we can make a list of input sections
@@ -934,13 +948,16 @@ elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
bfd_vma insn_addr;
bfd_vma insn_page;
bfd_boolean is_far = FALSE;
+ bfd_boolean is_xgate_symbol = FALSE;
+ bfd_boolean is_section_symbol = FALSE;
struct elf_link_hash_entry *h;
+ bfd_vma val;
r_symndx = ELF32_R_SYM (rel->r_info);
r_type = ELF32_R_TYPE (rel->r_info);
if (r_type == R_M68HC11_GNU_VTENTRY
- || r_type == R_M68HC11_GNU_VTINHERIT )
+ || r_type == R_M68HC11_GNU_VTINHERIT)
continue;
(*ebd->elf_info_to_howto_rel) (input_bfd, &arel, rel);
@@ -957,6 +974,8 @@ elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
+ sec->output_offset
+ sym->st_value);
is_far = (sym && (sym->st_other & STO_M68HC12_FAR));
+ is_xgate_symbol = (sym && (sym->st_target_internal));
+ is_section_symbol = ELF_ST_TYPE (sym->st_info) & STT_SECTION;
}
else
{
@@ -968,11 +987,12 @@ elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
warned);
is_far = (h && (h->other & STO_M68HC12_FAR));
+ is_xgate_symbol = (h && (h->target_internal));
}
- if (sec != NULL && elf_discarded_section (sec))
+ if (sec != NULL && discarded_section (sec))
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
- rel, relend, howto, contents);
+ rel, 1, relend, howto, 0, contents);
if (info->relocatable)
{
@@ -1015,6 +1035,50 @@ elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
phys_page = m68hc11_phys_page (pinfo, relocation + rel->r_addend);
switch (r_type)
{
+ case R_M68HC12_LO8XG:
+ /* This relocation is specific to XGATE IMM16 calls and will precede
+ a HI8. tc-m68hc11 only generates them in pairs.
+ Leave the relocation to the HI8XG step. */
+ r = bfd_reloc_ok;
+ r_type = R_M68HC11_NONE;
+ break;
+
+ case R_M68HC12_HI8XG:
+ /* This relocation is specific to XGATE IMM16 calls and must follow
+ a LO8XG. Does not actually check that it was a LO8XG.
+ Adjusts high and low bytes. */
+ relocation = phys_addr;
+ if ((elf_elfheader (input_bfd)->e_flags & E_M68HC11_XGATE_RAMOFFSET)
+ && (relocation >= 0x2000))
+ relocation += 0xc000; /* HARDCODED RAM offset for XGATE. */
+
+ /* Fetch 16 bit value including low byte in previous insn. */
+ val = (bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset) << 8)
+ | bfd_get_8 (input_bfd, (bfd_byte*) contents + rel->r_offset - 2);
+
+ /* Add on value to preserve carry, then write zero to high byte. */
+ relocation += val;
+
+ /* Write out top byte. */
+ bfd_put_8 (input_bfd, (relocation >> 8) & 0xff,
+ (bfd_byte*) contents + rel->r_offset);
+
+ /* Write out low byte to previous instruction. */
+ bfd_put_8 (input_bfd, relocation & 0xff,
+ (bfd_byte*) contents + rel->r_offset - 2);
+
+ /* Mark as relocation completed. */
+ r = bfd_reloc_ok;
+ r_type = R_M68HC11_NONE;
+ break;
+
+ /* The HI8 and LO8 relocs are generated by %hi(expr) %lo(expr)
+ assembler directives. %hi does not support carry. */
+ case R_M68HC11_HI8:
+ case R_M68HC11_LO8:
+ relocation = phys_addr;
+ break;
+
case R_M68HC11_24:
/* Reloc used by 68HC12 call instruction. */
bfd_put_16 (input_bfd, phys_addr,
@@ -1063,12 +1127,45 @@ elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
insn_page = m68hc11_phys_page (pinfo, insn_addr);
+ /* If we are linking an S12 instruction against an XGATE symbol, we
+ need to change the offset of the symbol value so that it's correct
+ from the S12's perspective. */
+ if (is_xgate_symbol)
+ {
+ /* The ram in the global space is mapped to 0x2000 in the 16-bit
+ address space for S12 and 0xE000 in the 16-bit address space
+ for XGATE. */
+ if (relocation >= 0xE000)
+ {
+ /* We offset the address by the difference
+ between these two mappings. */
+ relocation -= 0xC000;
+ break;
+ }
+ else
+ {
+ const char * msg;
+ char * buf;
+
+ msg = _("XGATE address (%lx) is not within shared RAM"
+ "(0xE000-0xFFFF), therefore you must manually offset "
+ "the address, and possibly manage the page, in your "
+ "code.");
+ buf = alloca (strlen (msg) + 128);
+ sprintf (buf, msg, phys_addr);
+ if (!((*info->callbacks->warning) (info, buf, name, input_bfd,
+ input_section, insn_addr)))
+ return FALSE;
+ break;
+ }
+ }
+
if (m68hc11_addr_is_banked (pinfo, relocation + rel->r_addend)
&& m68hc11_addr_is_banked (pinfo, insn_addr)
&& phys_page != insn_page)
{
- const char* msg;
- char* buf;
+ const char * msg;
+ char * buf;
msg = _("banked address [%lx:%04lx] (%lx) is not in the same bank "
"as current banked address [%lx:%04lx] (%lx)");
@@ -1084,10 +1181,11 @@ elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
return FALSE;
break;
}
+
if (phys_page != 0 && insn_page == 0)
{
- const char* msg;
- char* buf;
+ const char * msg;
+ char * buf;
msg = _("reference to a banked address [%lx:%04lx] in the "
"normal address space at %04lx");
@@ -1109,10 +1207,57 @@ elf32_m68hc11_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
relocation = phys_addr;
break;
}
+
+ /* If we are linking an XGATE instruction against an S12 symbol, we
+ need to change the offset of the symbol value so that it's correct
+ from the XGATE's perspective. */
+ if (!strcmp (howto->name, "R_XGATE_IMM8_LO")
+ || !strcmp (howto->name, "R_XGATE_IMM8_HI"))
+ {
+ /* We can only offset S12 addresses that lie within the non-paged
+ area of RAM. */
+ if (!is_xgate_symbol && !is_section_symbol)
+ {
+ /* The ram in the global space is mapped to 0x2000 and stops at
+ 0x4000 in the 16-bit address space for S12 and 0xE000 in the
+ 16-bit address space for XGATE. */
+ if (relocation >= 0x2000 && relocation < 0x4000)
+ /* We offset the address by the difference
+ between these two mappings. */
+ relocation += 0xC000;
+ else
+ {
+ const char * msg;
+ char * buf;
+
+ /* Get virtual address of instruction having the relocation. */
+ insn_addr = input_section->output_section->vma
+ + input_section->output_offset + rel->r_offset;
+
+ msg = _("S12 address (%lx) is not within shared RAM"
+ "(0x2000-0x4000), therefore you must manually "
+ "offset the address in your code");
+ buf = alloca (strlen (msg) + 128);
+ sprintf (buf, msg, phys_addr);
+ if (!((*info->callbacks->warning) (info, buf, name, input_bfd,
+ input_section, insn_addr)))
+ return FALSE;
+ break;
+ }
+ }
+ }
+
if (r_type != R_M68HC11_NONE)
- r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ {
+ if ((r_type == R_M68HC12_PCREL_9) || (r_type == R_M68HC12_PCREL_10))
+ r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
- relocation, rel->r_addend);
+ relocation - 2, rel->r_addend);
+ else
+ r = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents, rel->r_offset,
+ relocation, rel->r_addend);
+ }
if (r != bfd_reloc_ok)
{
@@ -1303,6 +1448,9 @@ _bfd_m68hc11_elf_print_private_bfd_data (bfd *abfd, void *ptr)
else
fprintf (file, _(" [memory=flat]"));
+ if (elf_elfheader (abfd)->e_flags & E_M68HC11_XGATE_RAMOFFSET)
+ fprintf (file, _(" [XGATE RAM offsetting]"));
+
fputc ('\n', file);
return TRUE;
generated by cgit v1.1 at 2025-08-04 23:33:55 +0000