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authorNick Clifton <nickc@redhat.com>2015-01-15 16:22:55 +0000
committerNick Clifton <nickc@redhat.com>2015-01-15 16:22:55 +0000
commitcd21f5daad4335b50366b838664ade64bec29957 (patch)
tree51f091bb808e6350a6c63a77cd8a4d5db16769e4
parent2d071cfc6614b4ec30fa4ef8b8af5bdf2c177858 (diff)
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Fix memory access violations triggered by running objdump on fuzzed binaries.
PR binutils/17512 * elf-m10300.c (mn10300_info_to_howto): Replace assertion with an error message. Never return an invalid howto pointer. * elf32-cr16.c (cr16_info_to_howto): Likewise. * elf32-crx.c (elf_crx_info_to_howto): Likewise. * elf32-i370.c (i370_elf_info_to_howto): Likewise. * elf32-mcore.c (mcore_elf_info_to_howto): Likewise. * elf32-microblaze.c (microblaze_elf_info_to_howto): Likewise. * elf32-mips.c (mips_elf32_rtype_to_howto): Likewise. * elf32-pj.c (pj_elf_info_to_howto): Likewise. * elf32-ppc.c (ppc_elf_info_to_howto): Likewise. * elf32-spu.c (spu_elf_info_to_howto): Likewise. * elf32-v850.c (v850_elf_info_to_howto_rela): Likewise. * elf32-vax.c (rtype_to_howto): Likewise. * elf64-alpha.c (elf64_alpha_info_to_howto): Likewise. * elf64-mips.c (mips_elf64_rtype_to_howto): Likewise. * elfn32-mips.c (sh_elf_info_to_howto): Likewise. * elf32-sh.c (sh_elf_info_to_howto): Likewise. (sh_elf_reloc): Check that the reloc is in range. * reloc.c (bfd_perform_relocation): Check that the section is big enough for the entire reloc. (bfd_generic_get_relocated_section_contents): Report unexpected return values from perform_reloc.
-rw-r--r--bfd/ChangeLog26
-rw-r--r--bfd/elf-m10300.c8
-rw-r--r--bfd/elf32-cr16.c8
-rw-r--r--bfd/elf32-crx.c8
-rw-r--r--bfd/elf32-i370.c13
-rw-r--r--bfd/elf32-mcore.c13
-rw-r--r--bfd/elf32-microblaze.c13
-rw-r--r--bfd/elf32-mips.c7
-rw-r--r--bfd/elf32-pj.c8
-rw-r--r--bfd/elf32-ppc.c15
-rw-r--r--bfd/elf32-sh.c27
-rw-r--r--bfd/elf32-spu.c9
-rw-r--r--bfd/elf32-v850.c6
-rw-r--r--bfd/elf32-vax.c13
-rw-r--r--bfd/elf64-alpha.c9
-rw-r--r--bfd/elf64-mips.c7
-rw-r--r--bfd/elfn32-mips.c7
-rw-r--r--bfd/reloc.c11
18 files changed, 178 insertions, 30 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 3a2d6f6..8c376e2 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,5 +1,31 @@
2015-01-15 Nick Clifton <nickc@redhat.com>
+ PR binutils/17512
+ * elf-m10300.c (mn10300_info_to_howto): Replace assertion with an
+ error message. Never return an invalid howto pointer.
+ * elf32-cr16.c (cr16_info_to_howto): Likewise.
+ * elf32-crx.c (elf_crx_info_to_howto): Likewise.
+ * elf32-i370.c (i370_elf_info_to_howto): Likewise.
+ * elf32-mcore.c (mcore_elf_info_to_howto): Likewise.
+ * elf32-microblaze.c (microblaze_elf_info_to_howto): Likewise.
+ * elf32-mips.c (mips_elf32_rtype_to_howto): Likewise.
+ * elf32-pj.c (pj_elf_info_to_howto): Likewise.
+ * elf32-ppc.c (ppc_elf_info_to_howto): Likewise.
+ * elf32-spu.c (spu_elf_info_to_howto): Likewise.
+ * elf32-v850.c (v850_elf_info_to_howto_rela): Likewise.
+ * elf32-vax.c (rtype_to_howto): Likewise.
+ * elf64-alpha.c (elf64_alpha_info_to_howto): Likewise.
+ * elf64-mips.c (mips_elf64_rtype_to_howto): Likewise.
+ * elfn32-mips.c (sh_elf_info_to_howto): Likewise.
+ * elf32-sh.c (sh_elf_info_to_howto): Likewise.
+ (sh_elf_reloc): Check that the reloc is in range.
+ * reloc.c (bfd_perform_relocation): Check that the section is big
+ enough for the entire reloc.
+ (bfd_generic_get_relocated_section_contents): Report unexpected
+ return values from perform_reloc.
+
+2015-01-15 Nick Clifton <nickc@redhat.com>
+
* elf32-msp430.c (msp430_elf_relax_section): Skip unhandled
relocs. Include PC-relative adjustment for R_MSP430X_ABS16
relaxation.
diff --git a/bfd/elf-m10300.c b/bfd/elf-m10300.c
index 6a18b44..52457ed 100644
--- a/bfd/elf-m10300.c
+++ b/bfd/elf-m10300.c
@@ -806,7 +806,13 @@ mn10300_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
unsigned int r_type;
r_type = ELF32_R_TYPE (dst->r_info);
- BFD_ASSERT (r_type < (unsigned int) R_MN10300_MAX);
+ if (r_type >= R_MN10300_MAX)
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised MN10300 reloc number: %d"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_MN10300_NONE;
+ }
cache_ptr->howto = elf_mn10300_howto_table + r_type;
}
diff --git a/bfd/elf32-cr16.c b/bfd/elf32-cr16.c
index dafbc08..7b9976a 100644
--- a/bfd/elf32-cr16.c
+++ b/bfd/elf32-cr16.c
@@ -673,7 +673,13 @@ elf_cr16_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
{
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
- BFD_ASSERT (r_type < (unsigned int) R_CR16_MAX);
+ if (r_type >= R_CR16_MAX)
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised CR16 reloc number: %d"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_CR16_NONE;
+ }
cache_ptr->howto = cr16_elf_howto_table + r_type;
}
diff --git a/bfd/elf32-crx.c b/bfd/elf32-crx.c
index 90948bc..3d82da2 100644
--- a/bfd/elf32-crx.c
+++ b/bfd/elf32-crx.c
@@ -423,7 +423,13 @@ elf_crx_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
unsigned int r_type = ELF32_R_TYPE (dst->r_info);
- BFD_ASSERT (r_type < (unsigned int) R_CRX_MAX);
+ if (r_type >= R_CRX_MAX)
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised CRX reloc number: %d"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_CRX_NONE;
+ }
cache_ptr->howto = &crx_elf_howto_table[r_type];
}
diff --git a/bfd/elf32-i370.c b/bfd/elf32-i370.c
index d4ff515..ab65cfc 100644
--- a/bfd/elf32-i370.c
+++ b/bfd/elf32-i370.c
@@ -294,12 +294,21 @@ i370_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
+ unsigned int r_type;
+
if (!i370_elf_howto_table[ R_I370_ADDR31 ])
/* Initialize howto table. */
i370_elf_howto_init ();
- BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_I370_max);
- cache_ptr->howto = i370_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
+ r_type = ELF32_R_TYPE (dst->r_info);
+ if (r_type >= R_I370_max)
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised I370 reloc number: %d"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_I370_NONE;
+ }
+ cache_ptr->howto = i370_elf_howto_table[r_type];
}
/* Hack alert -- the following several routines look generic to me ...
diff --git a/bfd/elf32-mcore.c b/bfd/elf32-mcore.c
index 01b136a..7e29901 100644
--- a/bfd/elf32-mcore.c
+++ b/bfd/elf32-mcore.c
@@ -340,13 +340,22 @@ mcore_elf_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED,
arelent * cache_ptr,
Elf_Internal_Rela * dst)
{
+ unsigned int r_type;
+
if (! mcore_elf_howto_table [R_MCORE_PCRELIMM8BY4])
/* Initialize howto table if needed. */
mcore_elf_howto_init ();
- BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_MCORE_max);
+ r_type = ELF32_R_TYPE (dst->r_info);
+ if (r_type >= R_MCORE_max)
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised MCore reloc number: %d"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_MCORE_NONE;
+ }
- cache_ptr->howto = mcore_elf_howto_table [ELF32_R_TYPE (dst->r_info)];
+ cache_ptr->howto = mcore_elf_howto_table [r_type];
}
/* The RELOCATE_SECTION function is called by the ELF backend linker
diff --git a/bfd/elf32-microblaze.c b/bfd/elf32-microblaze.c
index ab102b3..4217dd7 100644
--- a/bfd/elf32-microblaze.c
+++ b/bfd/elf32-microblaze.c
@@ -643,13 +643,22 @@ microblaze_elf_info_to_howto (bfd * abfd ATTRIBUTE_UNUSED,
arelent * cache_ptr,
Elf_Internal_Rela * dst)
{
+ unsigned int r_type;
+
if (!microblaze_elf_howto_table [R_MICROBLAZE_32])
/* Initialize howto table if needed. */
microblaze_elf_howto_init ();
- BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_MICROBLAZE_max);
+ r_type = ELF32_R_TYPE (dst->r_info);
+ if (r_type >= R_MICROBLAZE_max)
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised MicroBlaze reloc number: %d"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_MICROBLAZE_NONE;
+ }
- cache_ptr->howto = microblaze_elf_howto_table [ELF32_R_TYPE (dst->r_info)];
+ cache_ptr->howto = microblaze_elf_howto_table [r_type];
}
/* Microblaze ELF local labels start with 'L.' or '$L', not '.L'. */
diff --git a/bfd/elf32-mips.c b/bfd/elf32-mips.c
index 201c41a..c762d9a 100644
--- a/bfd/elf32-mips.c
+++ b/bfd/elf32-mips.c
@@ -2204,7 +2204,12 @@ mips_elf32_rtype_to_howto (unsigned int r_type,
return &elf_micromips_howto_table_rel[r_type - R_MICROMIPS_min];
if (r_type >= R_MIPS16_min && r_type < R_MIPS16_max)
return &elf_mips16_howto_table_rel[r_type - R_MIPS16_min];
- BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
+ if (r_type >= (unsigned int) R_MIPS_max)
+ {
+ (*_bfd_error_handler) (_("Unrecognised MIPS reloc number: %d"), r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_MIPS_NONE;
+ }
return &elf_mips_howto_table_rel[r_type];
}
}
diff --git a/bfd/elf32-pj.c b/bfd/elf32-pj.c
index 2d041e5..7498094 100644
--- a/bfd/elf32-pj.c
+++ b/bfd/elf32-pj.c
@@ -319,7 +319,13 @@ pj_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
r = ELF32_R_TYPE (dst->r_info);
- BFD_ASSERT (r < (unsigned int) R_PJ_max);
+ if (r >= R_PJ_max)
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised PicoJava reloc number: %d"),
+ abfd, r);
+ bfd_set_error (bfd_error_bad_value);
+ r = R_PJ_NONE;
+ }
cache_ptr->howto = &pj_elf_howto_table[r];
}
diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c
index a17ff12..2a0bdd3 100644
--- a/bfd/elf32-ppc.c
+++ b/bfd/elf32-ppc.c
@@ -2019,19 +2019,28 @@ ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
+ unsigned int r_type;
+
/* Initialize howto table if not already done. */
if (!ppc_elf_howto_table[R_PPC_ADDR32])
ppc_elf_howto_init ();
- BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
- cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
+ r_type = ELF32_R_TYPE (dst->r_info);
+ if (r_type >= R_PPC_max)
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised PPC reloc number: %d"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_PPC_NONE;
+ }
+ cache_ptr->howto = ppc_elf_howto_table[r_type];
/* Just because the above assert didn't trigger doesn't mean that
ELF32_R_TYPE (dst->r_info) is necessarily a valid relocation. */
if (!cache_ptr->howto)
{
(*_bfd_error_handler) (_("%B: invalid relocation type %d"),
- abfd, ELF32_R_TYPE (dst->r_info));
+ abfd, r_type);
bfd_set_error (bfd_error_bad_value);
cache_ptr->howto = ppc_elf_howto_table[R_PPC_NONE];
diff --git a/bfd/elf32-sh.c b/bfd/elf32-sh.c
index 04e588d..a13a6f6 100644
--- a/bfd/elf32-sh.c
+++ b/bfd/elf32-sh.c
@@ -255,6 +255,13 @@ sh_elf_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol_in,
&& bfd_is_und_section (symbol_in->section))
return bfd_reloc_undefined;
+ /* PR 17512: file: 9891ca98. */
+ if (addr > bfd_get_section_limit (abfd, input_section)
+ - bfd_get_reloc_size (reloc_entry->howto)
+ || bfd_get_reloc_size (reloc_entry->howto)
+ > bfd_get_section_limit (abfd, input_section))
+ return bfd_reloc_outofrange;
+
if (bfd_is_com_section (symbol_in->section))
sym_value = 0;
else
@@ -474,13 +481,19 @@ sh_elf_info_to_howto (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
r = ELF32_R_TYPE (dst->r_info);
- BFD_ASSERT (r < (unsigned int) R_SH_max);
- BFD_ASSERT (r < R_SH_FIRST_INVALID_RELOC || r > R_SH_LAST_INVALID_RELOC);
- BFD_ASSERT (r < R_SH_FIRST_INVALID_RELOC_2 || r > R_SH_LAST_INVALID_RELOC_2);
- BFD_ASSERT (r < R_SH_FIRST_INVALID_RELOC_3 || r > R_SH_LAST_INVALID_RELOC_3);
- BFD_ASSERT (r < R_SH_FIRST_INVALID_RELOC_4 || r > R_SH_LAST_INVALID_RELOC_4);
- BFD_ASSERT (r < R_SH_FIRST_INVALID_RELOC_5 || r > R_SH_LAST_INVALID_RELOC_5);
- BFD_ASSERT (r < R_SH_FIRST_INVALID_RELOC_6 || r > R_SH_LAST_INVALID_RELOC_6);
+ if (r >= R_SH_max
+ || (r >= R_SH_FIRST_INVALID_RELOC && r <= R_SH_LAST_INVALID_RELOC)
+ || (r >= R_SH_FIRST_INVALID_RELOC_2 && r <= R_SH_LAST_INVALID_RELOC_2)
+ || (r >= R_SH_FIRST_INVALID_RELOC_3 && r <= R_SH_LAST_INVALID_RELOC_3)
+ || (r >= R_SH_FIRST_INVALID_RELOC_4 && r <= R_SH_LAST_INVALID_RELOC_4)
+ || (r >= R_SH_FIRST_INVALID_RELOC_5 && r <= R_SH_LAST_INVALID_RELOC_5)
+ || (r >= R_SH_FIRST_INVALID_RELOC_6 && r <= R_SH_LAST_INVALID_RELOC_6))
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised SH reloc number: %d"),
+ abfd, r);
+ bfd_set_error (bfd_error_bad_value);
+ r = R_SH_NONE;
+ }
cache_ptr->howto = get_howto_table (abfd) + r;
}
diff --git a/bfd/elf32-spu.c b/bfd/elf32-spu.c
index ace7c29..21fd856 100644
--- a/bfd/elf32-spu.c
+++ b/bfd/elf32-spu.c
@@ -151,7 +151,14 @@ spu_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
enum elf_spu_reloc_type r_type;
r_type = (enum elf_spu_reloc_type) ELF32_R_TYPE (dst->r_info);
- BFD_ASSERT (r_type < R_SPU_max);
+ /* PR 17512: file: 90c2a92e. */
+ if (r_type >= R_SPU_max)
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised SPU reloc number: %d"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_SPU_NONE;
+ }
cache_ptr->howto = &elf_howto_table[(int) r_type];
}
diff --git a/bfd/elf32-v850.c b/bfd/elf32-v850.c
index 31cbcc9..ea60c59 100644
--- a/bfd/elf32-v850.c
+++ b/bfd/elf32-v850.c
@@ -1914,7 +1914,11 @@ v850_elf_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
unsigned int r_type;
r_type = ELF32_R_TYPE (dst->r_info);
- BFD_ASSERT (r_type < (unsigned int) R_V850_max);
+ if (r_type >= (unsigned int) R_V850_max)
+ {
+ _bfd_error_handler (_("%A: invalid V850 reloc number: %d"), abfd, r_type);
+ r_type = 0;
+ }
cache_ptr->howto = &v850_elf_howto_table[r_type];
}
diff --git a/bfd/elf32-vax.c b/bfd/elf32-vax.c
index cae0bb2..3282d19 100644
--- a/bfd/elf32-vax.c
+++ b/bfd/elf32-vax.c
@@ -283,8 +283,17 @@ static void
rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
- BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_VAX_max);
- cache_ptr->howto = &howto_table[ELF32_R_TYPE(dst->r_info)];
+ unsigned int r_type;
+
+ r_type = ELF32_R_TYPE (dst->r_info);
+ if (r_type >= R_VAX_max)
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised VAX reloc number: %d"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_VAX_NONE;
+ }
+ cache_ptr->howto = &howto_table[r_type];
}
#define elf_info_to_howto rtype_to_howto
diff --git a/bfd/elf64-alpha.c b/bfd/elf64-alpha.c
index 0ffe3fa..8f64114 100644
--- a/bfd/elf64-alpha.c
+++ b/bfd/elf64-alpha.c
@@ -1105,7 +1105,14 @@ elf64_alpha_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
Elf_Internal_Rela *dst)
{
unsigned r_type = ELF64_R_TYPE(dst->r_info);
- BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
+
+ if (r_type >= R_ALPHA_max)
+ {
+ (*_bfd_error_handler) (_("%A: unrecognised Alpha reloc number: %d"),
+ abfd, r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_ALPHA_NONE;
+ }
cache_ptr->howto = &elf64_alpha_howto_table[r_type];
}
diff --git a/bfd/elf64-mips.c b/bfd/elf64-mips.c
index 017efac..7ad872c 100644
--- a/bfd/elf64-mips.c
+++ b/bfd/elf64-mips.c
@@ -3585,7 +3585,12 @@ mips_elf64_rtype_to_howto (unsigned int r_type, bfd_boolean rela_p)
else
return &mips16_elf64_howto_table_rel[r_type - R_MIPS16_min];
}
- BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
+ if (r_type >= R_MIPS_max)
+ {
+ (*_bfd_error_handler) (_("unrecognised MIPS reloc number: %d"), r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_MIPS_NONE;
+ }
if (rela_p)
return &mips_elf64_howto_table_rela[r_type];
else
diff --git a/bfd/elfn32-mips.c b/bfd/elfn32-mips.c
index 08fbd48..299ea4d 100644
--- a/bfd/elfn32-mips.c
+++ b/bfd/elfn32-mips.c
@@ -3403,7 +3403,12 @@ mips_elf_n32_rtype_to_howto (unsigned int r_type, bfd_boolean rela_p)
else
return &elf_mips16_howto_table_rel[r_type - R_MIPS16_min];
}
- BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
+ if (r_type >= R_MIPS_max)
+ {
+ (*_bfd_error_handler) (_("unrecognised MIPS reloc number: %d"), r_type);
+ bfd_set_error (bfd_error_bad_value);
+ r_type = R_MIPS_NONE;
+ }
if (rela_p)
return &elf_mips_howto_table_rela[r_type];
else
diff --git a/bfd/reloc.c b/bfd/reloc.c
index 4167608..b018a3e 100644
--- a/bfd/reloc.c
+++ b/bfd/reloc.c
@@ -623,7 +623,10 @@ bfd_perform_relocation (bfd *abfd,
/* PR 17512: file: c146ab8b.
PR 17512: file: 46dff27f.
Include the size of the reloc in the test for out of range addresses. */
- - bfd_get_reloc_size (howto))
+ - bfd_get_reloc_size (howto)
+ /* PR 17512: file: 38e53ebf
+ Add make sure that there is enough room for the relocation to be applied. */
+ || bfd_get_reloc_size (howto) > bfd_get_section_limit (abfd, input_section))
return bfd_reloc_outofrange;
/* Work out which section the relocation is targeted at and the
@@ -7691,7 +7694,11 @@ bfd_generic_get_relocated_section_contents (bfd *abfd,
goto error_return;
default:
- abort ();
+ /* PR 17512; file: 90c2a92e.
+ Report unexpected results, without aborting. */
+ link_info->callbacks->einfo
+ (_("%X%P: %B(%A): relocation \"%R\" returns an unrecognized value %x\n"),
+ abfd, input_section, * parent, r);
break;
}