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Author SHA1 Message Date
H.J. Lu
caa65211bb Add "-z call-nop=PADDING" option to ld 
The ld linker can transform indirect call to a locally defined function,
foo, via its GOT slot, to either "NOP call foo" or "call foo NOP" where
NOP is a 1-byte NOP padding.  This patch adds a "-z call-nop=PADDING"
option to x86 ld to control 1-byte NOP padding for x86 call instruction.
PADDING is one of prefix-addr, prefix-nop, suffix-nop, prefix-NUMBER or
suffix-NUMBER.

bfd/

	* elf32-i386.c (elf_i386_convert_load): Use call_nop_byte and
	check call_nop_as_suffix for 1-byte NOP padding to pad call.
	* elf64-x86-64.c (elf_x86_64_convert_load): Likewise.

include/

	* bfdlink.h (bfd_link_info): Add call_nop_as_suffix and
	call_nop_byte.

ld/

	* ld/ld.texinfo: Document "-z call-nop=PADDING" option.
	* emulparams/call_nop.sh: New file.
	* emulparams/elf_i386_be.sh: Source
	${srcdir}/emulparams/call_nop.sh.
	* emulparams/elf_i386_chaos.sh: Likewise.
	* emulparams/elf_i386_ldso.sh: Likewise.
	* emulparams/elf_i386_vxworks.sh: Likewise.
	* emulparams/elf_iamcu.sh: Likewise.
	* emulparams/elf_k1om.sh: Likewise.
	* emulparams/elf_l1om.sh: Likewise.
	* emulparams/elf_x86_64.sh: Likewise.
	* emultempl/elf32.em (gld${EMULATION_NAME}_before_parse): Set
	link_info.call_nop_byte if $CALL_NOP_BYTE isn't empty.

ld/testsuite/

	* ld-i386/call3.s: New file.
	* ld-i386/call3a.d: Likewise.
	* ld-i386/call3b.d: Likewise.
	* ld-i386/call3c.d: Likewise.
	* ld-i386/call3d.d: Likewise.
	* ld-i386/call3e.d: Likewise.
	* ld-i386/call3f.d: Likewise.
	* ld-i386/call3g.d: Likewise.
	* ld-i386/call3h.d: Likewise.
	* ld-i386/load1-nacl.d: Likewise.
	* ld-x86-64/call1.s: Likewise.
	* ld-x86-64/call1a.d: Likewise.
	* ld-x86-64/call1b.d: Likewise.
	* ld-x86-64/call1c.d: Likewise.
	* ld-x86-64/call1d.d: Likewise.
	* ld-x86-64/call1e.d: Likewise.
	* ld-x86-64/call1f.d: Likewise.
	* ld-x86-64/call1g.d: Likewise.
	* ld-x86-64/call1h.d: Likewise.
	* ld-x86-64/call1i.d: Likewise.
	* ld-x86-64/load1a-nacl.d: Likewise.
	* ld-x86-64/load1b-nacl.d: Likewise.
	* ld-x86-64/load1c-nacl.d: Likewise.
	* ld-x86-64/load1d-nacl.d: Likewise.
 2015-10-22 04:56:39 -07:00
H.J. Lu
889c2a6796 Add -z noextern-protected-data to ld for ELF/x86 
Address of protected data defined in the shared library may be external,
i.e., due to copy relocation.  By default, linker backend checks if
relocations against protected data symbols are valid for building shared
library and issues an error if relocation isn't allowed.  The new option
override linker backend default.  When -z noextern-protected-data is used,
updates on protected data symbols by another module won't be visibile
to the resulting shared library.  This option is specific to ELF/i386
and ELF/x86-64.

bfd/

	PR ld/pr17709
	* elflink.c (_bfd_elf_adjust_dynamic_copy): Check
	info->extern_protected_data when warning copy relocs against
	protected symbols.
	(_bfd_elf_symbol_refs_local_p): Check info->extern_protected_data
	when checking protected non-function symbols.

include/

	PR ld/pr17709
	* bfdlink.h (bfd_link_info): Add extern_protected_data.

ld/

	PR ld/pr17709
	* ld.texinfo: Document "-z noextern-protected-data".
	* ldmain.c (main): Initialize link_info.extern_protected_data
	to -1.
	* lexsup.c (elf_shlib_list_options): Add
	"-z [no]extern-protected-data".
	* emulparams/elf32_x86_64.sh: Source extern_protected_data.sh.
	* emulparams/elf_i386.sh: Likewise.
	* emulparams/elf_i386_be.sh: Likewise.
	* emulparams/elf_i386_chaos.sh: Likewise.
	* emulparams/elf_i386_ldso.sh: Likewise.
	* emulparams/elf_i386_vxworks.sh: Likewise.
	* emulparams/elf_k1om.sh: Likewise.
	* emulparams/elf_l1om.sh: Likewise.
	* emulparams/elf_x86_64.sh: Source extern_protected_data.sh.
	(PARSE_AND_LIST_OPTIONS): Renamed to ...
	(PARSE_AND_LIST_OPTIONS_BNDPLT): This.
	(PARSE_AND_LIST_ARGS_CASE_Z): Renamed to ...
	(PARSE_AND_LIST_ARGS_CASE_Z_BNDPLT): This.
	(PARSE_AND_LIST_OPTIONS): Append $PARSE_AND_LIST_OPTIONS_BNDPLT.
	(PARSE_AND_LIST_ARGS_CASE_Z): Append
	$PARSE_AND_LIST_ARGS_CASE_Z_BNDPLT.
	* emulparams/extern_protected_data.sh: New file.

ld/testsuite/

	PR ld/pr17709
	* ld-i386/i386.exp: Run protected6b.
	* ld-i386/protected6b.d: New file.
	* ld-x86-64/protected6b.d: Likewise.
	* ld-x86-64/x86-64.exp:  Run protected6b.
 2015-04-14 04:13:11 -07:00
Alan Modra
fb42df5ed9 * emultempl/elf32.em (gld${EMULATION_NAME}_add_options, 
gld${EMULATION_NAME}_handle_option, gld${EMULATION_NAME}_list_options):
	Provide --build-id, -z defs, -z muldefs, -z max-page-size,
	-z common-page-size, -z execstack, -z noexecstack for all targets.
	Add help for --exclude-libs.
	(OPTION_LD_GENERATED_UNWIND_INFO,
	OPTION_NO_LD_GENERATED_UNWIND_INFO): Move this..
	(gld${EMULATION_NAME}_handle_option): ..and code handling
	--ld-generated-unwind-info and --no-ld-generated-unwind-info..
	* emulparams/plt_unwind.sh: ..to here.  New file.  Add help.
	* emulparams/elf32_x86_64.sh: Include plt_unwind.sh.
	* emulparams/elf_i386.sh: Likewise.
	* emulparams/elf_i386_chaos.sh: Likewise.
	* emulparams/elf_i386_ldso.sh: Likewise.
	* emulparams/elf_l1om.sh: Likewise.
	* emulparams/elf_x86_64.sh: Likewise.
 2011-07-14 02:38:43 +00:00
Alan Modra
88bba78dc4 PR 4515 
* genscripts.sh: Delete all references to NONPAGED_TEXT_START_ADDR.
	* ldint.texinfo: Likewise.
	* emulparams/armaoutb.sh (NONPAGED_TEXT_START_ADDRESS): Delete.
	* emulparams/armaoutl.sh: Likewise.
	* emulparams/arcelf.sh (NONPAGED_TEXT_START_ADDR): Delete.
	* emulparams/bfin.sh: Likewise
	* emulparams/crisaout.sh: Likewise
	* emulparams/elf32_sparc.sh: Likewise
	* emulparams/elf32am33lin.sh: Likewise
	* emulparams/elf32b4300.sh: Likewise
	* emulparams/elf32bmip.sh: Likewise
	* emulparams/elf32mcore.sh: Likewise
	* emulparams/elf32xtensa.sh: Likewise
	* emulparams/elf64_s390.sh: Likewise
	* emulparams/elf64_sparc.sh: Likewise
	* emulparams/elf64alpha.sh: Likewise
	* emulparams/elf_i386.sh: Likewise
	* emulparams/elf_i386_be.sh: Likewise
	* emulparams/elf_i386_chaos.sh: Likewise
	* emulparams/elf_i386_ldso.sh: Likewise
	* emulparams/elf_i386_vxworks.sh: Likewise
	* emulparams/elf_s390.sh: Likewise
	* emulparams/elf_x86_64.sh: Likewise
	* emulparams/i386aout.sh: Likewise
	* emulparams/i386moss.sh: Likewise
	* emulparams/i386msdos.sh: Likewise
	* emulparams/i386nto.sh: Likewise
	* emulparams/i386nw.sh: Likewise
	* emulparams/m68kaout.sh: Likewise
	* emulparams/m68kelf.sh: Likewise
	* emulparams/ppcnw.sh: Likewise
	* emulparams/sun4.sh: Likewise
	* emulparams/tic80coff.sh: Likewise
	* emulparams/vaxnbsd.sh: Likewise
	* emulparams/armnbsd.sh (NONPAGED_TEXT_START_ADDR): Delete.
	(TEXT_START_ADDR): Set for -n, -N.
	* emulparams/coff_sparc.sh: Likewise
	* emulparams/elf32vax.sh: Likewise
	* emulparams/i386bsd.sh: Likewise
	* emulparams/i386go32.sh: Likewise
	* emulparams/i386linux.sh: Likewise
	* emulparams/i386lynx.sh: Likewise
	* emulparams/i386mach.sh: Likewise
	* emulparams/m68k4knbsd.sh: Likewise
	* emulparams/m68klinux.sh: Likewise
	* emulparams/m68knbsd.sh: Likewise
	* emulparams/ns32knbsd.sh: Likewise
	* emulparams/pc532macha.sh: Likewise
	* emulparams/ppclynx.sh: Likewise
	* emulparams/scoreelf.sh: Likewise
	* emulparams/sparcaout.sh: Likewise
	* emulparams/sparclinux.sh: Likewise
	* emulparams/sun3.sh: Likewise
	* emulparams/vsta.sh: Likewise
 2007-08-09 11:02:24 +00:00
H.J. Lu
24718e3ba5 bfd/ 
2006-05-30  H.J. Lu  <hongjiu.lu@intel.com>

	* bfd.c (bfd_emul_get_maxpagesize): New.
	(bfd_elf_set_pagesize): Likewise.
	(bfd_emul_set_maxpagesize): Likewise.
	(bfd_emul_get_commonpagesize): Likewise.
	(bfd_emul_set_commonpagesize): Likewise.
	* bfd-in2.h: Regenerated.

	* elf-bfd.h (elf_backend_data): Add commonpagesize.
	(xvec_get_elf_backend_data): New.
	(get_elf_backend_data): Use xvec_get_elf_backend_data.

	* elf32-arm.c (elf32_arm_vxworks_bed): Remove const.
	* elfxx-target.h (elfNN_bed): Likewise.

	* elf32-arm.c (ELF_COMMONPAGESIZE): Defined.
	* elf32-mips.c (ELF_COMMONPAGESIZE): Likewise.
	* elf32-ppc.c (ELF_COMMONPAGESIZE): Likewise.
	* elf32-sh.c (ELF_COMMONPAGESIZE): Likewise.
	* elf32-sh64.c (ELF_COMMONPAGESIZE): Likewise.
	* elf32-sparc.c (ELF_COMMONPAGESIZE): Likewise.
	* elf64-alpha.c (ELF_COMMONPAGESIZE): Likewise.
	* elf64-ppc.c (ELF_COMMONPAGESIZE): Likewise.
	* elf64-sparc.c (ELF_COMMONPAGESIZE): Likewise.
	* elf64-x86-64.c (ELF_COMMONPAGESIZE): Likewise.
	* elfn32-mips.c (ELF_COMMONPAGESIZE): Likewise.
	* elfxx-ia64.c (ELF_COMMONPAGESIZE): Likewise.

	* elfxx-target.h (ELF_COMMONPAGESIZE): Define if not defined.
	(elfNN_bed): Initialize commonpagesize with ELF_COMMONPAGESIZE.

	* targets.c (bfd_find_target): Support NULL abfd.

ld/

2006-05-30  H.J. Lu  <hongjiu.lu@intel.com>

	* emulparams/arcelf.sh (MAXPAGESIZE): Changed to
	"CONSTANT (MAXPAGESIZE)".
	* emulparams/armelf_nbsd.sh: Likewise.
	* emulparams/armelf_vxworks.sh: Likewise.
	* emulparams/armnto.sh: Likewise.
	* emulparams/armsymbian.sh: Likewise.
	* emulparams/crislinux.sh: Likewise.
	* emulparams/elf32_i860.sh: Likewise.
	* emulparams/elf32_i960.sh: Likewise.
	* emulparams/elf32am33lin.sh: Likewise.
	* emulparams/elf32bfinfd.sh: Likewise.
	* emulparams/elf32bmipn32-defs.sh: Likewise.
	* emulparams/elf32frvfd.sh: Likewise.
	* emulparams/elf32i370.sh: Likewise.
	* emulparams/elf32lppcnto.sh: Likewise.
	* emulparams/elf32mcore.sh: Likewise.
	* emulparams/elf32openrisc.sh: Likewise.
	* emulparams/elf32ppcnto.sh: Likewise.
	* emulparams/elf32ppcwindiss.sh: Likewise.
	* emulparams/elf32vax.sh: Likewise.
	* emulparams/elf32xc16x.sh: Likewise.
	* emulparams/elf32xc16xl.sh: Likewise.
	* emulparams/elf32xc16xs.sh: Likewise.
	* emulparams/elf64_aix.sh: Likewise.
	* emulparams/elf64hppa.sh: Likewise.
	* emulparams/elf64mmix.sh: Likewise.
	* emulparams/elf_i386_be.sh: Likewise.
	* emulparams/elf_i386_chaos.sh: Likewise.
	* emulparams/elf_i386_ldso.sh: Likewise.
	* emulparams/hppa64linux.sh: Likewise.
	* emulparams/hppalinux.sh: Likewise.
	* emulparams/hppaobsd.sh: Likewise.
	* emulparams/i386lynx.sh: Likewise.
	* emulparams/i386moss.sh: Likewise.
	* emulparams/i386nto.sh: Likewise.
	* emulparams/i386nw.sh: Likewise.
	* emulparams/m32relf_linux.sh: Likewise.
	* emulparams/m68kpsos.sh: Likewise.
	* emulparams/or32elf.sh: Likewise.
	* emulparams/pjelf.sh: Likewise.
	* emulparams/pjlelf.sh: Likewise.
	* emulparams/ppclynx.sh: Likewise.
	* emulparams/ppcnw.sh: Likewise.
	* emulparams/shelf32_nbsd.sh : Likewise.
	* emulparams/shelf_nbsd.sh: Likewise.
	* emulparams/shelf_nto.sh: Likewise.
	* emulparams/shlelf_nto.sh: Likewise.
	* emulparams/xtensa-config.sh: Likewise.

	* emulparams/armelf_linux.sh (MAXPAGESIZE): Changed to
	"CONSTANT (MAXPAGESIZE)".
	(COMMONPAGESIZE): Changed to "CONSTANT (COMMONPAGESIZE)".
	* emulparams/elf32_sparc.sh: Likewise.
	* emulparams/elf32bmip.sh: Likewise.
	* emulparams/elf32ppccommon.sh: Likewise.
	* emulparams/elf64_ia64.sh: Likewise.
	* emulparams/elf64_s390.sh: Likewise.
	* emulparams/elf64_sparc.sh: Likewise.
	* emulparams/elf64alpha.sh: Likewise.
	* emulparams/elf64ppc.sh: Likewise.
	* emulparams/elf_i386.sh: Likewise.
	* emulparams/elf_i386_vxworks.sh: Likewise.
	* emulparams/elf_s390.sh: Likewise.
	* emulparams/elf_x86_64.sh: Likewise.
	* emulparams/shlelf32_linux.sh: Likewise.
	* emulparams/shlelf_linux.sh: Likewise.

	* emulparams/elf32bmipn32.sh (COMMONPAGESIZE): Changed to
	"CONSTANT (COMMONPAGESIZE)".
	* emulparams/elf32btsmipn32.sh: Likewise.

	* emultempl/elf32.em (gld${EMULATION_NAME}_handle_option): Add
	"-z max-page-size=" and "-z common-page-size=".
	(gld${EMULATION_NAME}_list_options): Likewise.

	* ld.h (ld_config_type): Add maxpagesize and commonpagesize.

	* ld.texinfo: Document "-z max-page-size=" and
	"-z common-page-size=".

	* ldexp.c (exp_print_token): Handle CONSTANT.
	(fold_name): Likewise.
	* ldgram.y: Likewise.
	* ldlex.l: Likewise.

	* ldmain.c (main): Initiliaze config.maxpagesize and
	config.commonpagesize. Call bfd_emul_set_maxpagesize if
	config.maxpagesize isn't 0. Call bfd_emul_set_commonpagesize if
	config.commonpagesize config.maxpagesize isn't 0.
ld/testsuite/

2006-05-30  H.J. Lu  <hongjiu.lu@intel.com>

	* ld-elf/binutils.exp: New file.
	* ld-elf/commonpage1.d: Likewise.
	* ld-elf/maxpage1.d: Likewise.
	* ld-elf/maxpage1.s: Likewise.
 2006-05-30 16:45:32 +00:00
Nick Clifton
b4477fa895 Install new elf_chaos.sc script. 2002-05-27 17:52:56 +00:00
H.J. Lu
484593416a 2001-11-27 H.J. Lu <hjl@gnu.org> 
* emulparams/elf_i386.sh (NO_SMALL_DATA): Set to yes.
	* emulparams/elf_i386_be.sh (NO_SMALL_DATA): Likewise.
	* emulparams/elf_i386_chaos.sh (NO_SMALL_DATA): Likewise.
	* emulparams/elf_i386_ldso.sh (NO_SMALL_DATA): Likewise.
	* emulparams/elf_x86_64.sh (NO_SMALL_DATA): Likewise.
	* emulparams/m68kelf.sh (NO_SMALL_DATA): Likewise.
	* emulparams/elf32_sparc.sh (NO_SMALL_DATA): Likewise.
	* emulparams/elf64_sparc.sh (NO_SMALL_DATA): Likewise.

	* scripttempl/elf.sc (SBSS): New. Define if ${NO_SMALL_DATA}
	is not empty.
	(SDATA): Likewise.
	(REL_SDATA): Likewise.
	(REL_SBSS): Likewise.
	(REL_SDATA2): Likewise.
	(REL_SBSS2): Likewise.
	(SBSS2): Define if ${NO_SMALL_DATA} is not empty.
	(SDATA2): Likewise.
 2001-11-27 19:06:07 +00:00
Alan Modra
563e308f24 * ld.texinfo: Document that fill values now use the four least 
significant bytes.
	* emulparams/elf32fr30.sh (NOP): Update.
	* emulparams/elf32mcore.sh: Likewise.
	* emulparams/elf64_s390.sh: Likewise.
	* emulparams/elf_i386.sh: Likewise.
	* emulparams/elf_i386_be.sh: Likewise.
	* emulparams/elf_i386_chaos.sh: Likewise.
	* emulparams/elf_i386_ldso.sh: Likewise.
	* emulparams/elf_s390.sh: Likewise.
	* emulparams/elf_x86_64.sh: Likewise.
	* emulparams/i386moss.sh: Likewise.
	* emulparams/i386nw.sh: Likewise.
	* emulparams/m68kelf.sh: Likewise.
	* scripttempl/elf.sc: Update NOP comment.
	* scripttempl/elfi370.sc: Likewise.
	* scripttempl/elfm68hc11.sc: Likewise.
	* scripttempl/elfm68hc12.sc: Likewise.
	* scripttempl/nw.sc: Likewise.
 2001-08-17 09:51:08 +00:00
Nick Clifton
59ff2774bb Add support for *-storm-chaos target 2000-11-02 23:03:24 +00:00