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binutils/SOURCES/binutils-clearing-discarded-relocs.patch

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import binutils-2.30-108.el8
2021-11-09 09:52:09 +00:00
diff -rup binutils.orig/bfd/cofflink.c binutils-2.30/bfd/cofflink.c
--- binutils.orig/bfd/cofflink.c 2021-06-15 15:38:31.578170486 +0100
+++ binutils-2.30/bfd/cofflink.c 2021-06-15 15:59:12.394611963 +0100
@@ -3084,8 +3084,8 @@ _bfd_coff_generic_relocate_section (bfd
then zero this reloc field. */
if (sec != NULL && discarded_section (sec))
{
- _bfd_clear_contents (howto, input_bfd, input_section,
- contents + (rel->r_vaddr - input_section->vma));
+ (void) _bfd_clear_contents (howto, input_bfd, input_section,
+ contents, (rel->r_vaddr - input_section->vma));
continue;
}
diff -rup binutils.orig/bfd/dwarf2.c binutils-2.30/bfd/dwarf2.c
--- binutils.orig/bfd/dwarf2.c 2021-06-15 15:38:31.597170370 +0100
+++ binutils-2.30/bfd/dwarf2.c 2021-06-15 15:42:19.979779516 +0100
@@ -2865,7 +2865,9 @@ find_abstract_instance_name (struct comp
info_ptr = unit->stash->info_ptr_memory;
info_ptr_end = unit->stash->info_ptr_end;
total = info_ptr_end - info_ptr;
- if (!die_ref || die_ref >= total)
+ if (!die_ref)
+ return TRUE;
+ if (die_ref >= total)
{
_bfd_error_handler
(_("Dwarf Error: Invalid abstract instance DIE ref."));
diff -rup binutils.orig/bfd/elf-bfd.h binutils-2.30/bfd/elf-bfd.h
--- binutils.orig/bfd/elf-bfd.h 2021-06-15 15:38:31.595170382 +0100
+++ binutils-2.30/bfd/elf-bfd.h 2021-06-15 15:58:55.365715715 +0100
@@ -2829,8 +2829,8 @@ extern asection _bfd_elf_large_com_secti
howto, index, contents) \
{ \
int i_; \
- _bfd_clear_contents (howto, input_bfd, input_section, \
- contents + rel[index].r_offset); \
+ (void) _bfd_clear_contents (howto, input_bfd, input_section, \
+ contents, rel[index].r_offset); \
\
if (bfd_link_relocatable (info) \
&& (input_section->flags & SEC_DEBUGGING)) \
diff -rup binutils.orig/bfd/elf32-arc.c binutils-2.30/bfd/elf32-arc.c
--- binutils.orig/bfd/elf32-arc.c 2021-06-15 15:38:31.579170480 +0100
+++ binutils-2.30/bfd/elf32-arc.c 2021-06-15 15:58:28.869877138 +0100
@@ -1532,8 +1532,8 @@ elf_arc_relocate_section (bfd * outp
/* Clean relocs for symbols in discarded sections. */
if (sec != NULL && discarded_section (sec))
{
- _bfd_clear_contents (howto, input_bfd, input_section,
- contents + rel->r_offset);
+ (void) _bfd_clear_contents (howto, input_bfd, input_section,
+ contents, rel->r_offset);
rel->r_offset = rel->r_offset;
rel->r_info = 0;
rel->r_addend = 0;
diff -rup binutils.orig/bfd/elf32-i386.c binutils-2.30/bfd/elf32-i386.c
--- binutils.orig/bfd/elf32-i386.c 2021-06-15 15:38:31.578170486 +0100
+++ binutils-2.30/bfd/elf32-i386.c 2021-06-15 15:58:12.694975692 +0100
@@ -2165,8 +2165,8 @@ elf_i386_relocate_section (bfd *output_b
if (sec != NULL && discarded_section (sec))
{
- _bfd_clear_contents (howto, input_bfd, input_section,
- contents + rel->r_offset);
+ (void) _bfd_clear_contents (howto, input_bfd, input_section,
+ contents, rel->r_offset);
wrel->r_offset = rel->r_offset;
wrel->r_info = 0;
wrel->r_addend = 0;
diff -rup binutils.orig/bfd/elf32-metag.c binutils-2.30/bfd/elf32-metag.c
--- binutils.orig/bfd/elf32-metag.c 2021-06-15 15:38:31.593170394 +0100
+++ binutils-2.30/bfd/elf32-metag.c 2021-06-15 15:57:48.039125909 +0100
@@ -1392,8 +1392,8 @@ metag_final_link_relocate (reloc_howto_t
#define METAG_RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
rel, relend, howto, contents) \
{ \
- _bfd_clear_contents (howto, input_bfd, input_section, \
- contents + rel->r_offset); \
+ (void) _bfd_clear_contents (howto, input_bfd, input_section, \
+ contents, rel->r_offset); \
\
if (bfd_link_relocatable (info) \
&& (input_section->flags & SEC_DEBUGGING)) \
diff -rup binutils.orig/bfd/elf32-nds32.c binutils-2.30/bfd/elf32-nds32.c
--- binutils.orig/bfd/elf32-nds32.c 2021-06-15 15:38:31.589170419 +0100
+++ binutils-2.30/bfd/elf32-nds32.c 2021-06-15 15:56:30.184600239 +0100
@@ -12771,18 +12771,17 @@ nds32_elf_get_relocated_section_contents
symbol = *(*parent)->sym_ptr_ptr;
if (symbol->section && discarded_section (symbol->section))
{
- bfd_byte *p;
+ bfd_vma off;
static reloc_howto_type none_howto
= HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, NULL,
"unused", FALSE, 0, 0, FALSE);
- p = data + (*parent)->address * bfd_octets_per_byte (input_bfd);
- _bfd_clear_contents ((*parent)->howto, input_bfd, input_section,
- p);
- (*parent)->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
+ off = (*parent)->address * bfd_octets_per_byte (input_bfd);
+ r = _bfd_clear_contents ((*parent)->howto, input_bfd,
+ input_section, data, off);
+ (*parent)->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
(*parent)->addend = 0;
(*parent)->howto = &none_howto;
- r = bfd_reloc_ok;
}
else
r = bfd_perform_relocation (input_bfd, *parent, data,
diff -rup binutils.orig/bfd/elf32-ppc.c binutils-2.30/bfd/elf32-ppc.c
--- binutils.orig/bfd/elf32-ppc.c 2021-06-15 15:38:31.597170370 +0100
+++ binutils-2.30/bfd/elf32-ppc.c 2021-06-15 15:56:39.367544293 +0100
@@ -7778,8 +7778,8 @@ ppc_elf_relocate_section (bfd *output_bf
if (r_type < R_PPC_max)
howto = ppc_elf_howto_table[r_type];
- _bfd_clear_contents (howto, input_bfd, input_section,
- contents + rel->r_offset);
+ (void) _bfd_clear_contents (howto, input_bfd, input_section,
+ contents, rel->r_offset);
wrel->r_offset = rel->r_offset;
wrel->r_info = 0;
wrel->r_addend = 0;
diff -rup binutils.orig/bfd/elf32-visium.c binutils-2.30/bfd/elf32-visium.c
--- binutils.orig/bfd/elf32-visium.c 2021-06-15 15:38:31.580170473 +0100
+++ binutils-2.30/bfd/elf32-visium.c 2021-06-15 15:57:29.271240254 +0100
@@ -616,8 +616,8 @@ visium_elf_relocate_section (bfd *output
/* For relocs against symbols from removed linkonce sections,
or sections discarded by a linker script, we just want the
section contents zeroed. Avoid any special processing. */
- _bfd_clear_contents (howto, input_bfd, input_section,
- contents + rel->r_offset);
+ (void) _bfd_clear_contents (howto, input_bfd, input_section,
+ contents, rel->r_offset);
rel->r_info = 0;
rel->r_addend = 0;
diff -rup binutils.orig/bfd/elf64-ppc.c binutils-2.30/bfd/elf64-ppc.c
--- binutils.orig/bfd/elf64-ppc.c 2021-06-15 15:38:31.578170486 +0100
+++ binutils-2.30/bfd/elf64-ppc.c 2021-06-15 15:57:01.529409265 +0100
@@ -13526,9 +13526,9 @@ ppc64_elf_relocate_section (bfd *output_
if (sec != NULL && discarded_section (sec))
{
- _bfd_clear_contents (ppc64_elf_howto_table[r_type],
- input_bfd, input_section,
- contents + rel->r_offset);
+ (void) _bfd_clear_contents (ppc64_elf_howto_table[r_type],
+ input_bfd, input_section,
+ contents, rel->r_offset);
wrel->r_offset = rel->r_offset;
wrel->r_info = 0;
wrel->r_addend = 0;
diff -rup binutils.orig/bfd/elf64-x86-64.c binutils-2.30/bfd/elf64-x86-64.c
--- binutils.orig/bfd/elf64-x86-64.c 2021-06-15 15:38:31.585170443 +0100
+++ binutils-2.30/bfd/elf64-x86-64.c 2021-06-15 15:57:09.831358693 +0100
@@ -2457,8 +2457,8 @@ elf_x86_64_relocate_section (bfd *output
if (sec != NULL && discarded_section (sec))
{
- _bfd_clear_contents (howto, input_bfd, input_section,
- contents + rel->r_offset);
+ (void) _bfd_clear_contents (howto, input_bfd, input_section,
+ contents, rel->r_offset);
wrel->r_offset = rel->r_offset;
wrel->r_info = 0;
wrel->r_addend = 0;
diff -rup binutils.orig/bfd/libbfd-in.h binutils-2.30/bfd/libbfd-in.h
--- binutils.orig/bfd/libbfd-in.h 2021-06-15 15:38:31.593170394 +0100
+++ binutils-2.30/bfd/libbfd-in.h 2021-06-15 15:54:10.856449129 +0100
@@ -674,8 +674,9 @@ extern bfd_reloc_status_type _bfd_reloca
(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,
- asection *input_section, bfd_byte *location);
+extern bfd_reloc_status_type _bfd_clear_contents
+ (reloc_howto_type *howto, bfd *input_bfd,
+ asection *input_section, bfd_byte *, bfd_vma);
/* Link stabs in sections in the first pass. */
diff -rup binutils.orig/bfd/libbfd.h binutils-2.30/bfd/libbfd.h
--- binutils.orig/bfd/libbfd.h 2021-06-15 15:38:31.581170467 +0100
+++ binutils-2.30/bfd/libbfd.h 2021-06-15 15:53:55.863540475 +0100
@@ -679,8 +679,9 @@ extern bfd_reloc_status_type _bfd_reloca
(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,
- asection *input_section, bfd_byte *location);
+extern bfd_reloc_status_type _bfd_clear_contents
+ (reloc_howto_type *howto, bfd *input_bfd,
+ asection *input_section, bfd_byte *, bfd_vma);
/* Link stabs in sections in the first pass. */
diff -rup binutils.orig/bfd/reloc.c binutils-2.30/bfd/reloc.c
--- binutils.orig/bfd/reloc.c 2021-06-15 15:38:31.593170394 +0100
+++ binutils-2.30/bfd/reloc.c 2021-06-15 15:51:59.449249747 +0100
@@ -1604,23 +1604,29 @@ _bfd_relocate_contents (reloc_howto_type
relocations against discarded symbols, to make ignorable debug or unwind
information more obvious. */
-void
+bfd_reloc_status_type
_bfd_clear_contents (reloc_howto_type *howto,
bfd *input_bfd,
asection *input_section,
- bfd_byte *location)
+ bfd_byte *buf,
+ bfd_vma off)
{
int size;
bfd_vma x = 0;
+ bfd_byte *location;
+
+ if (!bfd_reloc_offset_in_range (howto, input_bfd, input_section, off))
+ return bfd_reloc_outofrange;
/* Get the value we are going to relocate. */
- size = bfd_get_reloc_size (howto);
+ location = buf + off;
+ size = bfd_get_reloc_size (howto);
switch (size)
{
default:
- abort ();
+ return bfd_reloc_notsupported;
case 0:
- return;
+ return bfd_reloc_ok;
case 1:
x = bfd_get_8 (input_bfd, location);
break;
@@ -1634,7 +1640,7 @@ _bfd_clear_contents (reloc_howto_type *h
#ifdef BFD64
x = bfd_get_64 (input_bfd, location);
#else
- abort ();
+ return bfd_reloc_notsupported;
#endif
break;
}
@@ -1654,7 +1660,7 @@ _bfd_clear_contents (reloc_howto_type *h
{
default:
case 0:
- abort ();
+ return bfd_reloc_notsupported;
case 1:
bfd_put_8 (input_bfd, x, location);
break;
@@ -1668,10 +1674,12 @@ _bfd_clear_contents (reloc_howto_type *h
#ifdef BFD64
bfd_put_64 (input_bfd, x, location);
#else
- abort ();
+ return bfd_reloc_notsupported;
#endif
break;
}
+
+ return bfd_reloc_ok;
}
/*
@@ -8209,20 +8217,30 @@ bfd_generic_get_relocated_section_conten
goto error_return;
}
- if (symbol->section && discarded_section (symbol->section))
+ /* Zap reloc field when the symbol is from a discarded
+ section, ignoring any addend. Do the same when called
+ from bfd_simple_get_relocated_section_contents for
+ undefined symbols in debug sections. This is to keep
+ debug info reasonably sane, in particular so that
+ DW_FORM_ref_addr to another file's .debug_info isn't
+ confused with an offset into the current file's
+ .debug_info. */
+ if ((symbol->section != NULL && discarded_section (symbol->section))
+ || (symbol->section == bfd_und_section_ptr
+ && (input_section->flags & SEC_DEBUGGING) != 0
+ && link_info->input_bfds == link_info->output_bfd))
{
- bfd_byte *p;
+ bfd_vma off;
static reloc_howto_type none_howto
= HOWTO (0, 0, 0, 0, FALSE, 0, complain_overflow_dont, NULL,
"unused", FALSE, 0, 0, FALSE);
- p = data + (*parent)->address * bfd_octets_per_byte (input_bfd);
- _bfd_clear_contents ((*parent)->howto, input_bfd, input_section,
- p);
+ off = (*parent)->address * bfd_octets_per_byte (input_bfd);
+ r = _bfd_clear_contents ((*parent)->howto, input_bfd,
+ input_section, data, off);
(*parent)->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
(*parent)->addend = 0;
(*parent)->howto = &none_howto;
- r = bfd_reloc_ok;
}
else
r = bfd_perform_relocation (input_bfd,
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