+2016-03-15 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR ld/19807
+ * elf64-x86-64.c (elf_x86_64_relocate_section): Check
+ no_reloc_overflow_check to diable R_X86_64_32/R_X86_64_32S
+ relocation overflow check.
+
2016-03-14 H.J. Lu <hongjiu.lu@intel.com>
* bfd-in2.h: Regenerated.
/* Let's help debug shared library creation. These relocs
cannot be used in shared libs. Don't error out for
sections we don't care about, such as debug sections or
- non-constant sections. */
- if (bfd_link_pic (info)
+ non-constant sections, or when relocation overflow check
+ is disabled. */
+ if (!info->no_reloc_overflow_check
+ && bfd_link_pic (info)
&& (sec->flags & SEC_ALLOC) != 0
&& (sec->flags & SEC_READONLY) != 0)
{
}
else
{
- /* This symbol is local, or marked to become local. */
- if (r_type == htab->pointer_r_type)
+ /* This symbol is local, or marked to become local.
+ When relocation overflow check is disabled, we
+ convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
+ if (r_type == htab->pointer_r_type
+ || (r_type == R_X86_64_32
+ && info->no_reloc_overflow_check))
{
relocate = TRUE;
outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
+2016-03-15 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR ld/19807
+ * bfdlink.h (bfd_link_info): Add no_reloc_overflow_check.
+
2016-03-08 Cupertino Miranda <Cupertino.Miranda@synopsys.com>
Andrew Burgess <andrew.burgess@embecosm.com>
/* TRUE if generation of .interp/PT_INTERP should be suppressed. */
unsigned int nointerp: 1;
+ /* TRUE if we shouldn't check relocation overflow. */
+ unsigned int no_reloc_overflow_check: 1;
+
/* TRUE if generate a 1-byte NOP as suffix for x86 call instruction. */
unsigned int call_nop_as_suffix : 1;
+2016-03-15 H.J. Lu <hongjiu.lu@intel.com>
+
+ PR ld/19807
+ * Makefile.am (ELF_X86_DEPS): Add
+ $(srcdir)/emulparams/reloc_overflow.sh.
+ * Makefile.in: Regenerated.
+ * NEWS: Mention -z noreloc-overflow.
+ * ld.texinfo: Document -z noreloc-overflow.
+ * emulparams/elf32_x86_64.sh: Source
+ ${srcdir}/emulparams/reloc_overflow.sh.
+ * emulparams/elf_x86_64.sh: Likewise.
+ * emulparams/reloc_overflow.sh: New file.
+ * testsuite/ld-x86-64/pr19807-1.s: New file.
+ * testsuite/ld-x86-64/pr19807-1a.d: Likewise.
+ * testsuite/ld-x86-64/pr19807-1b.d: Likewise.
+ * testsuite/ld-x86-64/pr19807-2.s: Likewise.
+ * testsuite/ld-x86-64/pr19807-2a.d: Likewise.
+ * testsuite/ld-x86-64/pr19807-2b.d: Likewise.
+ * testsuite/ld-x86-64/pr19807-2c.d: Likewise.
+ * testsuite/ld-x86-64/pr19807-2d.d: Likewise.
+ * testsuite/ld-x86-64/pr19807-2e.d: Likewise.
+ * testsuite/ld-x86-64/x86-64.exp: Run PR ld/19807 tests.
+
2016-03-13 H.J. Lu <hongjiu.lu@intel.com>
PR ld/19539
ELF_X86_DEPS = $(ELF_DEPS) $(srcdir)/emulparams/plt_unwind.sh \
$(srcdir)/emulparams/extern_protected_data.sh \
$(srcdir)/emulparams/dynamic_undefined_weak.sh \
+ $(srcdir)/emulparams/reloc_overflow.sh \
$(srcdir)/emulparams/call_nop.sh
@TDIRS@
ELF_X86_DEPS = $(ELF_DEPS) $(srcdir)/emulparams/plt_unwind.sh \
$(srcdir)/emulparams/extern_protected_data.sh \
$(srcdir)/emulparams/dynamic_undefined_weak.sh \
+ $(srcdir)/emulparams/reloc_overflow.sh \
$(srcdir)/emulparams/call_nop.sh
-*- text -*-
+* Support for -z noreloc-overflow in the x86-64 ELF linker to disable
+ relocation overflow check.
+
* Add -z common/-z nocommon options for ELF targets to control whether to
convert common symbols to the STT_COMMON type during a relocatable link.
. ${srcdir}/emulparams/plt_unwind.sh
. ${srcdir}/emulparams/extern_protected_data.sh
. ${srcdir}/emulparams/dynamic_undefined_weak.sh
+. ${srcdir}/emulparams/reloc_overflow.sh
. ${srcdir}/emulparams/call_nop.sh
SCRIPT_NAME=elf
ELFSIZE=32
. ${srcdir}/emulparams/plt_unwind.sh
. ${srcdir}/emulparams/extern_protected_data.sh
. ${srcdir}/emulparams/dynamic_undefined_weak.sh
+. ${srcdir}/emulparams/reloc_overflow.sh
. ${srcdir}/emulparams/call_nop.sh
SCRIPT_NAME=elf
ELFSIZE=64
--- /dev/null
+PARSE_AND_LIST_OPTIONS_RELOC_OVERFLOW='
+ fprintf (file, _("\
+ -z noreloc-overflow Disable relocation overflow check\n"));
+'
+PARSE_AND_LIST_ARGS_CASE_Z_RELOC_OVERFLOW='
+ else if (strcmp (optarg, "noreloc-overflow") == 0)
+ link_info.no_reloc_overflow_check = TRUE;
+'
+
+PARSE_AND_LIST_OPTIONS="$PARSE_AND_LIST_OPTIONS $PARSE_AND_LIST_OPTIONS_RELOC_OVERFLOW"
+PARSE_AND_LIST_ARGS_CASE_Z="$PARSE_AND_LIST_ARGS_CASE_Z $PARSE_AND_LIST_ARGS_CASE_Z_RELOC_OVERFLOW"
dynamic relocations against undefined weak symbols in executable.
Supported for i386 and x86-64.
+@item noreloc-overflow
+Disable relocation overflow check. This can be used to disable
+relocation overflow check if there will be no dynamic relocation
+overflow at run-time. Supported for x86_64.
+
@item call-nop=prefix-addr
@itemx call-nop=prefix-nop
@itemx call-nop=suffix-nop
--- /dev/null
+ .globl _start
+ .type _start, @function
+_start:
+ movq $foo, %rax
+ .size _start, .-_start
+ .data
+foo:
+ .quad 0
--- /dev/null
+#source: pr19807-1.s
+#as: --64
+#ld: -pie -melf_x86_64 -z noreloc-overflow
+#objdump: -dw
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+[a-f0-9]+ <_start>:
+[ ]*[a-f0-9]+: 48 c7 c0 ([0-9a-f]{2} ){4} mov \$0x[a-f0-9]+,%rax
+#pass
--- /dev/null
+#source: pr19807-1.s
+#as: --x32
+#ld: -pie -melf32_x86_64 -z noreloc-overflow
+#objdump: -dw
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+[a-f0-9]+ <_start>:
+[ ]*[a-f0-9]+: 48 c7 c0 ([0-9a-f]{2} ){4} mov \$0x[a-f0-9]+,%rax
+#pass
--- /dev/null
+ .globl _start
+ .type _start, @function
+_start:
+ movl $foo, %eax
+ .size _start, .-_start
+ .data
+foo:
+ .quad 0
--- /dev/null
+#source: pr19807-2.s
+#as: --64
+#ld: -pie -melf_x86_64
+#error: .*relocation R_X86_64_32 against `.data' can not be used when making a shared object; recompile with -fPIC
--- /dev/null
+#source: pr19807-2.s
+#as: --x32
+#ld: -pie -melf32_x86_64
+#readelf: -r --wide
+
+Relocation section '.rela.dyn' at offset 0x[0-9a-f]+ contains 1 entries:
+ Offset Info Type Sym. Value Symbol's Name \+ Addend
+[0-9a-f]+ +[0-9a-f]+ +R_X86_64_RELATIVE +[0-9a-f]+
--- /dev/null
+#source: pr19807-2.s
+#as: --x32
+#ld: -pie -melf32_x86_64
+#objdump: -dw
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+[a-f0-9]+ <_start>:
+[ ]*[a-f0-9]+: b8 ([0-9a-f]{2} ){4} mov \$0x[a-f0-9]+,%eax
+#pass
--- /dev/null
+#source: pr19807-2.s
+#as: --64
+#ld: -pie -melf_x86_64 -z noreloc-overflow
+#readelf: -r --wide
+
+Relocation section '.rela.dyn' at offset 0x[0-9a-f]+ contains 1 entries:
+ Offset Info Type Symbol's Value Symbol's Name \+ Addend
+[0-9a-f]+ +[0-9a-f]+ +R_X86_64_RELATIVE +[0-9a-f]+
--- /dev/null
+#source: pr19807-2.s
+#as: --64
+#ld: -pie -melf_x86_64 -z noreloc-overflow
+#objdump: -dw
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+[a-f0-9]+ <_start>:
+[ ]*[a-f0-9]+: b8 ([0-9a-f]{2} ){4} mov \$0x[a-f0-9]+,%eax
+#pass
run_dump_test "largecomm-1f"
run_dump_test "pr19539a"
run_dump_test "pr19539b"
+run_dump_test "pr19807-1a"
+run_dump_test "pr19807-1b"
+run_dump_test "pr19807-2a"
+run_dump_test "pr19807-2b"
+run_dump_test "pr19807-2c"
+run_dump_test "pr19807-2d"
+run_dump_test "pr19807-2e"
if { ![istarget "x86_64-*-linux*"] && ![istarget "x86_64-*-nacl*"]} {
return
projects / binutils-gdb.git / commitdiff