* libbfd-in.h (_bfd_clear_contents): New prototype.
* reloc.c (_bfd_clear_contents): New.
* libbfd.h: Regenerated.
* elf32-arm.c (elf32_arm_final_link_relocate): Use
_bfd_clear_contents.
* elf32-d10v.c (elf32_d10v_relocate_section): Likewise.
* elf32-hppa.c (elf32_hppa_relocate_section): Likewise.
* elf32-i386.c (elf_i386_relocate_section): Likewise.
* elf32-ppc.c (ppc_elf_relocate_section): Likewise.
* elf32-s390.c (elf_s390_relocate_section): Likewise.
* elf32-sh.c (sh_elf_relocate_section): Likewise.
* elf32-xtensa.c (elf_xtensa_relocate_section): Likewise.
* elf64-ppc.c (ppc64_elf_relocate_section): Likewise.
* elf64-s390.c (elf_s390_relocate_section): Likewise.
* elf64-x86-64.c (elf64_x86_64_relocate_section): Likewise.
* elfxx-sparc.c (_bfd_sparc_elf_relocate_section): Likewise.
* elfxx-ia64.c (elfNN_ia64_relocate_section): Set value to
zero for discarded symbols.
* elfxx-mips.c (mips_elf_calculate_relocation): Likewise.
ld/testsuite/
* ld-discard/zero-rel.d, ld-discard/zero-rel.s: New files.
+2006-11-02 Daniel Jacobowitz <dan@codesourcery.com>
+
+ * libbfd-in.h (_bfd_clear_contents): New prototype.
+ * reloc.c (_bfd_clear_contents): New.
+ * libbfd.h: Regenerated.
+
+ * elf32-arm.c (elf32_arm_final_link_relocate): Use
+ _bfd_clear_contents.
+ * elf32-d10v.c (elf32_d10v_relocate_section): Likewise.
+ * elf32-hppa.c (elf32_hppa_relocate_section): Likewise.
+ * elf32-i386.c (elf_i386_relocate_section): Likewise.
+ * elf32-ppc.c (ppc_elf_relocate_section): Likewise.
+ * elf32-s390.c (elf_s390_relocate_section): Likewise.
+ * elf32-sh.c (sh_elf_relocate_section): Likewise.
+ * elf32-xtensa.c (elf_xtensa_relocate_section): Likewise.
+ * elf64-ppc.c (ppc64_elf_relocate_section): Likewise.
+ * elf64-s390.c (elf_s390_relocate_section): Likewise.
+ * elf64-x86-64.c (elf64_x86_64_relocate_section): Likewise.
+ * elfxx-sparc.c (_bfd_sparc_elf_relocate_section): Likewise.
+
+ * elfxx-ia64.c (elfNN_ia64_relocate_section): Set value to
+ zero for discarded symbols.
+ * elfxx-mips.c (mips_elf_calculate_relocation): Likewise.
+
2006-11-01 Thiemo Seufer <ths@mips.com>
David Ung <davidu@mips.com>
from removed linkonce sections, or sections discarded by
a linker script. */
if (r_symndx == 0)
- return bfd_reloc_ok;
+ {
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ return bfd_reloc_ok;
+ }
/* Handle relocations which should use the PLT entry. ABS32/REL32
will use the symbol's value, which may point to a PLT entry, but we
unresolved_reloc, warned);
}
+ if (r_symndx == 0)
+ {
+ /* r_symndx will be zero only for relocs against symbols from
+ removed linkonce sections, or sections discarded by a linker
+ script. For these relocs, we just want the section contents
+ zeroed. Avoid any special processing. */
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ continue;
+ }
+
if (h != NULL)
name = h->root.root.string;
else
/* r_symndx will be zero only for relocs against symbols
from removed linkonce sections, or sections discarded by
a linker script. */
- if (r_symndx == 0
- || (input_section->flags & SEC_ALLOC) == 0)
+ if (r_symndx == 0)
+ {
+ _bfd_clear_contents (elf_hppa_howto_table + r_type, input_bfd,
+ contents + rela->r_offset);
+ break;
+ }
+
+ if ((input_section->flags & SEC_ALLOC) == 0)
break;
/* The reloc types handled here and this conditional
if (r_symndx == 0)
{
- /* r_symndx will be zero only for relocs against symbols from
- removed linkonce sections, or sections discarded by a linker
- script. For these relocs, we just want the section contents
- zeroed. Avoid any special processing in the switch below. */
- r_type = R_386_NONE;
-
- relocation = 0;
- if (howto->pc_relative)
- relocation = (input_section->output_section->vma
- + input_section->output_offset
- + rel->r_offset);
+ /* r_symndx will be zero only for relocs against symbols from
+ removed linkonce sections, or sections discarded by a linker
+ script. For these relocs, we just want the section contents
+ zeroed. Avoid any special processing. */
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ continue;
}
switch (r_type)
a linker script. */
dodyn:
if (r_symndx == 0)
- break;
+ {
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ break;
+ }
/* Fall thru. */
if ((input_section->flags & SEC_ALLOC) == 0)
/* r_symndx will be zero only for relocs against symbols
from removed linkonce sections, or sections discarded by
a linker script. */
- if (r_symndx == 0
- || (input_section->flags & SEC_ALLOC) == 0)
+ if (r_symndx == 0)
+ {
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ break;
+ }
+
+ if ((input_section->flags & SEC_ALLOC) == 0)
break;
if ((info->shared
case R_SH_IMM_MEDHI16_PCREL:
case R_SH_IMM_HI16_PCREL:
#endif
+ /* r_symndx will be zero only for relocs against symbols
+ from removed linkonce sections, or sections discarded by
+ a linker script. */
+ if (r_symndx == 0)
+ {
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ continue;
+ }
+
if (info->shared
&& (h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
return FALSE;
}
+ if (r_symndx == 0)
+ {
+ /* r_symndx will be zero only for relocs against symbols from
+ removed linkonce sections, or sections discarded by a linker
+ script. For these relocs, we just want the section contents
+ zeroed. Avoid any special processing. */
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ continue;
+ }
+
/* There's no point in calling bfd_perform_relocation here.
Just go directly to our "special function". */
r = elf_xtensa_do_reloc (howto, input_bfd, input_section,
a linker script. */
dodyn:
if (r_symndx == 0)
- break;
+ {
+ _bfd_clear_contents (ppc64_elf_howto_table[r_type], input_bfd,
+ contents + rel->r_offset);
+ break;
+ }
/* Fall thru. */
dodyn2:
/* r_symndx will be zero only for relocs against symbols
from removed linkonce sections, or sections discarded by
a linker script. */
- if (r_symndx == 0
- || (input_section->flags & SEC_ALLOC) == 0)
+ if (r_symndx == 0)
+ {
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ break;
+ }
+
+ if ((input_section->flags & SEC_ALLOC) == 0)
break;
if ((info->shared
/* r_symndx will be zero only for relocs against symbols
from removed linkonce sections, or sections discarded by
a linker script. */
- if (r_symndx == 0
- || (input_section->flags & SEC_ALLOC) == 0)
+ if (r_symndx == 0)
+ {
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ break;
+ }
+
+ if ((input_section->flags & SEC_ALLOC) == 0)
break;
if ((info->shared
case R_IA64_LTV32LSB:
case R_IA64_LTV64MSB:
case R_IA64_LTV64LSB:
+ /* r_symndx will be zero only for relocs against symbols
+ from removed linkonce sections, or sections discarded by
+ a linker script. */
+ if (r_symndx == 0)
+ value = 0;
+
r = elfNN_ia64_install_value (hit_addr, value, r_type);
break;
input_section))
return bfd_reloc_undefined;
}
+ else if (r_symndx == 0)
+ /* r_symndx will be zero only for relocs against symbols
+ from removed linkonce sections, or sections discarded by
+ a linker script. */
+ value = 0;
else
{
if (r_type != R_MIPS_REL32)
/* r_symndx will be zero only for relocs against symbols
from removed linkonce sections, or sections discarded by
a linker script. */
- if (r_symndx == 0
- || (input_section->flags & SEC_ALLOC) == 0)
+ if (r_symndx == 0)
+ {
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ break;
+ }
+
+ if ((input_section->flags & SEC_ALLOC) == 0)
break;
if ((info->shared
extern bfd_reloc_status_type _bfd_relocate_contents
(reloc_howto_type *, bfd *, bfd_vma, bfd_byte *);
+/* Clear a given location using a given howto. */
+extern void _bfd_clear_contents (reloc_howto_type *howto, bfd *input_bfd,
+ bfd_byte *location);
+
/* Link stabs in sections in the first pass. */
extern bfd_boolean _bfd_link_section_stabs
extern bfd_reloc_status_type _bfd_relocate_contents
(reloc_howto_type *, bfd *, bfd_vma, bfd_byte *);
+/* Clear a given location using a given howto. */
+extern void _bfd_clear_contents (reloc_howto_type *howto, bfd *input_bfd,
+ bfd_byte *location);
+
/* Link stabs in sections in the first pass. */
extern bfd_boolean _bfd_link_section_stabs
return flag;
}
+/* Clear a given location using a given howto, by applying a relocation value
+ of zero and discarding any in-place addend. This is used for fixed-up
+ relocations against discarded symbols, to make ignorable debug or unwind
+ information more obvious. */
+
+void
+_bfd_clear_contents (reloc_howto_type *howto,
+ bfd *input_bfd,
+ bfd_byte *location)
+{
+ int size;
+ bfd_vma x = 0;
+
+ /* Get the value we are going to relocate. */
+ size = bfd_get_reloc_size (howto);
+ switch (size)
+ {
+ default:
+ case 0:
+ abort ();
+ case 1:
+ x = bfd_get_8 (input_bfd, location);
+ break;
+ case 2:
+ x = bfd_get_16 (input_bfd, location);
+ break;
+ case 4:
+ x = bfd_get_32 (input_bfd, location);
+ break;
+ case 8:
+#ifdef BFD64
+ x = bfd_get_64 (input_bfd, location);
+#else
+ abort ();
+#endif
+ break;
+ }
+
+ /* Zero out the unwanted bits of X. */
+ x &= ~howto->dst_mask;
+
+ /* Put the relocated value back in the object file. */
+ switch (size)
+ {
+ default:
+ case 0:
+ abort ();
+ case 1:
+ bfd_put_8 (input_bfd, x, location);
+ break;
+ case 2:
+ bfd_put_16 (input_bfd, x, location);
+ break;
+ case 4:
+ bfd_put_32 (input_bfd, x, location);
+ break;
+ case 8:
+#ifdef BFD64
+ bfd_put_64 (input_bfd, x, location);
+#else
+ abort ();
+#endif
+ break;
+ }
+}
+
/*
DOCDD
INODE
+2006-11-02 Daniel Jacobowitz <dan@codesourcery.com>
+
+ * ld-discard/zero-rel.d, ld-discard/zero-rel.s: New files.
+
2006-11-01 Thiemo Seufer <ths@mips.com>
* ld-mips-elf/mips16-intermix-1.s, ld-mips-elf/mips16-intermix-2.s,
--- /dev/null
+#source: zero-rel.s
+#ld: -T discard.ld
+#objdump: -s -j .debug_info
+
+.*: file format .*elf.*
+
+Contents of section .debug_info:
+ 0000 0+( 0+)? +(\.+) .*
--- /dev/null
+ .text
+ .globl _start
+_start:
+
+ .section .debug_info
+ .long .Ltext
+ .long .Ltext + 2
+
+ .section .text.exit,"ax"
+.Ltext:
+ .long 0
projects / thirdparty / binutils-gdb.git / commitdiff
